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Патент USA US3046715

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July 31, 1962
T. S. GATES
3,046,705
GEAR FINISHING MACHINE
Filed June 8, 1959
8 Sheets~Sheet 1
H62.
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52
‘
FIG.|
ATTORNEYS
i
July 31, 1962
T. s. GATES
3,046,705‘
GEAR FINISHING MACHINE
Filed June 8, 1959
8 Sheets-Sheetv 2
ATTOR N EYS
July 31, 1962
T. s. GATES
3,046,705
GEAR FINISHING MACHINE
Filed June 8, 1959
8 Sheets-Sheet 3
@
FIG.6
FIG.7
FIG.5
JNVENTOR.
'
THQMAS s. GATES
BY
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ATTORNEYS
July 31, 1962
3,046,705
T. s. GATES
GEAR FINISHING MACHINE
8 Sheets-Sheet 4
Filed June 8, 1959
FIG-3.8.
INVENTOR.
THq ‘AS seams
BY 5" " "' 1m
Q6 0&1"- @f
ATTORNEYS
July 31, 1962
T. s. GATES
3,046,705
GEAR FINISHING MACHINE
Filed June 8, 1959
8 Sheets-Sheet 5
1 HWIENTOR.
ATTbF'NEYS
July 31, 1962
T. s. GATES
3,046,705
GEAR FINISHING MACHINE
Filed June 8, 1959
8 Sheets-Sheet 6
lIi».
\
ATTORNEY
July 31, 1962
T. s. GATES
3,046,705
GEAR FINISHING MACHINE
Filed June 8, 1959
8 Sheets-Sheet 7
FIGJI.
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T
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L1.-:1LILI
INVEMTOR.
HOM WTEFS
/
ATTORNEYS
July 31, 1962
‘T. s. GATES
3,046,705
GEAR FINISHING MACHINE
Filed June 8, 1959
8 Sheets-Sheet 8_
INVENTOR.
ATTORNE , S
3,046,705
United States Patent 0 ”
Patented July .31, 1 962
2
1
ment of the work support so as to crown the teeth of a
3,046,705
work gear supported thereby.
GEAR FINISHZNG MACHINE
It is a further object of the present invention to pro
vide pressure feeding mechanism for a gear-like hone
which includes friction locking mechanism to lock the
hone against further feed after it has been urged into con
tact with a work gear at predetermined pressure.
It is a further object of the present invention to pro-vide
Thomas S. Gates, Grosse Pointe Woods, Mich, assignor
to National Broachjdz Machine Company, Detroit,
Mich, a corporation of Michigan
Filed June 8, I959, Ser. No. 318,574
16 Claims.
(Cl. sir-r105)
‘
The present invention relates to a gear ?nishing
machine, and more particularly to a gear ?nishing machine
of the type in which a gear-like ?nishing tool is rotated in
mesh with a work gear, either the gear or the tool being
driven directly and the other of the two members being
driven solely by the meshed engagement therebetween.
Preferably, the gear and tool are positioned with their
vaxes crossed in space ‘and for this purpose the tool has a
a gear ?nishing machine of the class described character
ized by its simplicity, its rigidity, and the ease with which
it may be adjusted and operated.
Other objects and features ofthe invention ‘will become
apparent as the description proceeds, especialy when taken
in conjunction with ‘the accompanying drawings, illus
15 trating preferred embodiments of the invention, wherein:
FIGURE 1 is a front elevational view of the gear ?nish-v
helix angle di?erent from the helix angle of the work
ing machine constructed in accordance with the present
gear. The gear and tool are relatively traversed or recip
invention.
rocated in a direction occupying a plane parallel to the
I
.
FIGURE 2 is a side elevational view, as seen from the
axes of both the gear and tool and this relative traverse
or reciprocation may be in a direction parallel ‘to the axis
of the gear or in a direction oblique thereto.
Means are provided for effecting a relative feed between
right of FIGURE 1.
FIGURE 3 is a side elevational view, as seen from
the left of FIGURE 1.
~
FIGURE 4 is a plan view of the machine.
FIGURE 5 is a side elevational view of the hone head
the gear and tool radially of the gear. In operation, the
gear and tool may be brought into mesh under a predeter 25 with parts broken away.
mined pressure and thereafter maintained at a constant
center distance, or maintained at a. constant center dis
tance with intermittent radial depth feed. Alternatively,
FIGURE 6A is an enlarged view of a portion of FIG
URE 6.
means may be provided for urging the gear and tool to
ward each other at a constant pressure so that as material
FIGURE 7 is a fragmentary elevational view looking 7
is removed from the gear there is a relative approach be
tween the axes of the gearand tool.
Reference’has heretofore been made to a gear-like tool.
Thils tool may be a gear shaving tool or a gear honing
too .
-
. FIGURE 6 is a fragmentary front elevational view of
the hone head with parts broken away.
‘
in the direction of the arrows 7—7, FIGURE 5.‘
FIGURE 8 is a front elevational view with parts
broken away ‘of-the hone supporting column and the hone
35
A gear shaving tool is a tool in the form of a gear
conjugate to a work gear in which the ?anks or sides of
supporting and driving assembly carried thereby.
FIGURE 9 is a plan view of the hone supporting col
umn and hone supporting and driving assembly carried
thereby.
I
p
.
,
I
,
,
the teeth of the gear are interrupted by parallel grooves
0r serrations extending generally in the plane of the gear
FIGURE 10 is a side elevational view of the structure
shown in FIGURE 8, as seen from the ‘right.
and providing alternate land surfaces having sharp cutting 40 FIGURE 11 is a side elevational view of the struc-'
or shaving edges at the corners thereof adapted to remove
ture shown in FIGURE 8, as viewed from the left.
material from the teeth of the work gear by. a shaving
FIGURE 12 is an elevational view of a honefeeding
operation.
device with parts broken away, employed in the present
>
A gear hone is a tool in the form of a gear in which
‘at least the surface portions of the teeth are‘forrned of 45
machine.
'
‘
Referring ?rst to FIGURES l—4 the machine comprises
a solid, hard but slightly yieldable resilient resin com
a base It} provided with a slide 12 mounted on ways or '
pound having abrasive particles embedded therein. Hones
rails I4 and adapted to be traversed rectilinearly along
of this type are commonly made of epoxy resin.
such ways by traverse mechanism including a feed screw
‘It is an object of the present invention to provide a
50 16 and associated feed nut 18 indicated diagrammatically
machine of the character described which includes a novei
in FIGURE 2. Feed screw I6 is driven in rotation
arrangement providing for convenient angular adjustment
through bevel gearing 17a, and drive shaft 17b, from
between the axes of the gear and tool while at the same
motor 170. As is conventional in the art the traverse is
time providing for limited radial ‘feed.
accomplished by motor means for effecting relative rota- ‘
More speci?cally, it is an object of the present invention 55 tion between the feed screw ‘and nut, and the motor is
to provide ‘an adjustable work support adapted to be
preferably controlled by suitable reversing means so that
maintained in a ?xed position during a machining opera
the cycle includes a predetermined number of traverse
tion, in combination with a hone supporting and driving
strokes or reciprocations;
I
assembly including a motor, a rotary hone supporting
Mounted on the base It} is a work support platform
spindle, and transmission means connecting the motor and
20 having a'tail stock 22 thereon and a power head
spindle, in which the entire hone supporting and driving
stock 24' associated therewith. The power headstock in
assembly is adjustable as a unit about an axis perpendic
cludes an air cylinder 26 connected by a suitable yoke
ular to and intersecting the axis of the gear to provide for
different crossed axes adjustment, and in which the hone
28 to the center of the headstock 20 so that the center
may be advanced or retracted relative to the center of
supporting spindle is mounted in the hone supporting and
driving assembly for limited traverse radially of the
the tail stock so as to engage or release a work gear.
gear.
.
It is a further object of the present invention to provide
The work supporting platform 20 is mounted for rock
ing movement about a vertical axis adapted to pass cen
trally through a work piece supported between the stocks- '
a machine as described in the preceding paragraph in
The pivot support for the platform 20 is indicated, at 30
cluding means responsive to traverse of said hone support 70 which it will be observed is midway between the head
ing and driving assembly for effecting a rocking move
and tail stocks. Outboard sliding supports indicated at
3,046,705
3
4
32 are provided between the base 10 and the work plat
form 20 for stabilizing the platform.
arm 72 adjustably carried in a circular slot 74 on the as
Mounted on the slide 12 is a pin 34 which is received
in a slot 36 formed in an angularly adjustable block 38
to the column.
sembly permits ?ne adjustments of the assembly relative
carried by a bracket 40 ?xed to the work support plat
form 20 adjacent one end thereof. The block 38 may
be adjusted to a desired position and locked in place by
When the clamp screws 66 are released angular adjust
ment of the assembly 5%) may be accomplished by rota
tion of a cylindrical pilot 76 projecting rearwardly from
a portion of the tool supporting and driving assembly hous
rock the work support platform 20 about its vertical
inner end with worm gear teeth 80 adapted to mesh with
ing 73 as best seen in FIGURE 5. The pilot 76 is re
suitable means such as a clamping screw indicated at 42.
ceived in a suitable bushing provided in the tool column
If the slot 36 is set into parallelism with the ways 14, it
will be apparent that traverse of the slide 12 will not 10 48 and as best seen in FIGURE 5, it is provided at its
axis. In fact, the pin 34- will prevent angular movement
of the work support platform 20 about its vertical axis
and will eliminate the necessity for any separate clamp
ing or fastening means to retain it in position. On the
other hand, if the block 38 is set at a small angle, traverse
of the hone slide 12 will result-in oscillation of the
work support platform 20 about its vertical axis in a
an adjusting worm 82.
The worm 82 as best seen 1n
FIGURES 9 and 10, is suported on- a shaft 84 journaled in
the tool column 48 and terminating in a squared end 86
which permits adjustment of crossed axes angle by a suit
able hand tool.
The tool supporting and driving assembly 50 includes
a frame 96 on which the motor 52 is mounted, the motor
being connected through a suitable coupling 92 to a
controlled manner in timed relation to traverse or re
ciprocation of the hone slide. This will have the effect 20 train of gears including pinions 94 and 96 to gear 98
of producing a crown on the teeth of the gear.
In the present machine the work supporting centers
are provided on free running spindles in the tail and
headstocks 22, 24 and direct rotation is imparted to the
gear ?nishing tool T. In addition, the necessary rela
tive adjustment between a work gear and the tool T to
provide for the desired crossed axes relationship is pro- .
vided speci?cally by mounting the tool for angular ad
justment. Also, the means for e?ecting relative radial
which is mounted on a shaft 100 carrying ‘a change gear
102. A second change gear 104 is mounted on a shaft
106 carrying another gear 108 which is in mesh with a
gear 110 keyed or otherwise secured to a shaft 112 which
is adapted to be connected to the spindle of the tool ‘as will
subsequently be described in detail.
The gear 110 is shown in FIGURE 6 and its shaft 112
is connected by a ?exible coupling indicated generally at
114- to the tool supporting spindle 116.
approach and separation between the gear and tool is 30 The present invention involves mounting the tool for
movement generally radial of its axis toward and away
accomplished by providing a cross slide on the tool slide
from the work gear so as to establish a predetermined
12. Finally, in order to provide for movement of the
pressure between the tool and work gear. In order that
tool T into engagement with the work piece under a rela
this pressure may be most accurately controlled the mecha
tively light and accurately controlled pressure, means are
provided for supporting a relatively light hone head for 35 nism movable with the tool at this time is reduced to a
minimum. For this purpose the tool head 54 is mounted
traverse relative to the adjustable hone supporting and
for limited movement on the tool supporting and driving
driving structure. More speci?cally, the foregoing is
accomplished by providing a cross slide 44, which as best
seen in FIGURESZ and 3 is movable on the tool slide
12 horizontally‘toward and away from the work support
platform 24). This adjustment is a rough adjustment and
is effected by a feed screw 46.
assembly 59.
Referring particularly to FIGURES 5, 6, and 6A, the
assembly housing 7 8 and pilot 76 are provided with regis
tering openings in which is received a bearing sleeve 120
which receives a multiplicity of ball bearings 122. Ex
tending rearwardly from the tool or hone head 54 is a
cylindrical stud 124 which ?ts within the ball bearings
Carried by and movable with the cross slide 44 is the
tool support column 48. Connected to the tool support
122. In addition, the tool supporting and driving housing
column as will subsequently be described in detail, is a 45 78 is provided with a pair of forwardly extending guide
tool supporting and driving assembly indicated generally
pins 126 received in ball sleeve vbearings 128. By this
at 50. The assembly includes the motor 52 and a trans
arrangement the tool or hone head 54 is mounted for
mission adapted to connect the motor to the tool T. The
movement to- the right and left as seen in FIGURE 5
tool T however is mounted in a separately movable tool
in ‘anti-friction bearings and is at the same time ?rmly
head 54 which is connected to the motor transmission by 50 and accurately guided during such movement relative to
a ?exible coupling and which is capable of movement
the tool supporting and driving housing 78.
perpendicular to the axis of the tool T. '
It will be observed that the supporting structure thus
Referring now to FIGURES 8-11 the tool cross slide
movable in the sleeve bearings 129 and 122 is relatively
44, the tool column 48, and the tool or hone supporting
light so that the force with which this component may be
and driving assembly 50 are shown in detail. ‘The cross 55 urged against a work piece may be controlled with great
slide 44, as previously described, is provided with the
accuracy.
hand operated feed screw 46 which is associated with a
Referring now more particularly to FIGURES 6 and
nut 60 which is bolted to the top of the tool slide 12.
6A, it will be observed that the spline shaft 112 is as
In FIGURE 11 the feed screw 46 is shown as associated
sembled with a sleeve 13!) rotatable in bearings 132
with a hand crank 62. This adjustment is provided for 60 mounted in an opening provided in the housing 78. Ac
moving the gear ?nishing tool into and out of the operat
cordingly, the stub spline shaft 112 is rotatable in the
ing position and to accommodate different sizes of gears
housing ‘78 but is ?xed against transverse movement rela
and tools. A ?ne adjustment which takes place during
tive thereto. On the other hand, the tool head 54 is mov
a machining cycle will subsequently be described.
able relative to the housing 73 through a limited range
The tool supporting and‘driving assembly St) is mounted
of movement. The tool head 54 includes the rotary
on the front face of the tool column 48 and is adapted
spindle 116 having a reduced end portion 134 on which
to be rotated into a position in accordance with the re
the gear-like honing or ?nishing tool is supported for rota
quired angle of crossed axes between the gear and tool. tion. The tool head 54 includes a rearwardly extending
Circular T-slot means indicated in FIGURE 8 at 64 are
generally tubular portion 136 in which are received spaced
provided and the tool supporting and driving assembly is 70 bearings 13% and 140 in which the tool spindle 116 is ro
adapted to be clamped in adjusted position by clamp screws
tatable. The spindle 116 is hollow and receives the uni
66. As best seen in FIGURE 10, the crossed axes angle
versal coupling 114 loosely therein, the coupling extend
may be read by matching scales indicated generally at 68
ing between the splined stub shaft 112 and ‘a similar
on circular portions of the column 48 and assembly 50.
splined stub shaft 142 located at the front end of the
In addition, an indicator 70 is provided operated by an 75 spindle. With this arrangement it will be observed that
3,046,705
5
the tool head 54 may be moved laterally relative to the
with respect to the housing 78. For this purpose there is
housing 78 for a limited range.
provided a block 170 connected by the screws 172 to a
7
Attention is directed to FIGURE 6A showing the
same parts on a somewhat enlarged scale, and in this
?gure it will be observed that a labyrinth type seal is
provided between the rotary sleeve 130 and the transverse
movable but non-rotary tubular portion of the tool head
54. Speci?cally, this labyrinth type seal comprises a pair
portion of the housing 78. A pair of levers 174 and 176
are pivoted to the underside of the tool head 54 by pivot
screws 178. The free ends of the levers'174 and 176 are
urged together by a tension spring 180, One of the levers,
as for, example the lever 176, carries an air cylinder 182,
having a piston therein connected to a piston rod 184
terminating in a headed abutment screw 186, theouter
of ?anged discs 144 and 146 pressed against a shoulder
148 on the sleeve 13-2. The labyrinth seal is completed 10 end of which is engageable with the other pivoted lever
by an annular member 15%) bolted or otherwise secured
174. When air is admitted to the cylinder 182 the levers
to the tool head as indicated 1at 152 and includes an in
174 and 176 are urged apart. When the air is released
wardly radially directed ?ange portion received between
the spring tends to move the free ends of the levers to
the outwardly extending ?ange portions of the members
gether.
144 and 146.
Adjacent the pivots provided by the screws 178 are
15
The inner end of the stud 124 of the tool head 54 is
projecting abutments 190 engageable with side portions
provided with a headed connector 154 for a purpose
of the block 17{9. The arrangement is such that extremely
' which will presently appear. A rigid arm 156 is provided
large wedging forces, may be provided which have the
which extends laterally from the tool ‘head ‘as best seen
effect of positively locking the head 54 against movement
in FIGURE 6, and is adapted to actuate an indicator 158
relative to the assembly housing 78. ‘If desired, for this
through ‘a bell crank lever 160 pivoted as indicated at
purpose the edges of the block ‘170 may be slightly in
162. The bell crank includes a downwardly open slot
clined as for example one or two degrees.
'
164 which receives a reduced end portion of ‘the arm 156.
Referring now to FIGURE 12 there is shown a mech*
From the foregoing description it will be observed that
anism for applying a predetermined variable constant '
the tool support mechanism includes a main tool slide, a 25 accurately controlled force to the hone head. Details of
cross slide movable on the main slide and including an
the mechanism shown in FIGURE 12 form no ‘part of
upstanding column, and a tool supporting and driving
assembly pivoted to the column for angular adjustment
about ‘a horizontal axis. The tool supporting and, driving
assembly includes a motor and transmission means to con
nect the motor to a tool supporting spindle. The tool
the present ‘invention ‘and are more fully shown and
claimed in the copending Davis application referred to.
above. However, for completeness thev mechanism is
illustrated herein.
The connector 154 which extends rearwardly from the
supporting spindle is provided with a relatively small light
hone head is illustrated in FIGURE 12. The feeding or
mounting head movable relative to the tool supporting and
driving assembly housing so that limited movement may
be imparted to the tool without the necessity of moving
biasing mechanism includes a dog 200 received behind
the head of the connector 154 and the head of the coni
the relatively massive tool supporting and driving as
sembly.
nector is engageable with the ?exible leaf. spring 2012.
The ?exible leaf spring is carried by a tiltable bracket in
dicated generally at 204, its pivot axisbeing indicated at
206. Vertically movable in the structure shownin FIG
Means later to be described are provided for moving
the tool head 54 relative to the assembly housing 78.
URE 12 is a post 208 having an inclined cam surface 210
However, at this time it may be noted that in the opera 40 engageable by roller 212 carried by the bracket 204.
tion of the machine the tool head may be. urged toward
Removable ‘Weights are carried at the upper end of the
a work gear under predetermined force under the control
post 208 to exert av predetermined force thereon ‘and
of the operator. Thereafter, the gear ?nishing operation
downward movement of the post is opposed by the fric
is carried out in one of two ways. In the ?rst place, after
tion of a bearing indicated at 214. Thus, so long as no
the gear and tool have been brought intopressure with a 45 force opposes clockwise rotation of the bracket 204, the
predetermined force, the relatively movable tool head
weight urges the post 208 downwardly without substantial
may be locked in position sO' that during the succeeding
opposition. However, as a tool on the tool head engages
?nishing operation it is not permitted to move either
a Work gear, rocking movement of the bracket 204'is
toward or away from the work piece, Alternatively, the
opposed and forces of sliding friction are developed be
tool head may be continuously urged toward the work 50 tween the bushing or roller 212 and the post 208.- Accord
gear and be permitted freedom of movement during the
ingly, at a de?nite loading on the bracket 204,.further
gear ?nishing operation.
downward movement of the post 208 is terminated. As
In the ?rst case the gear ?nishing operation is some
material is removed from the gear, additional rocking
what more effective in removing eccentricity for example,
movement of the bracket 204 and corresponding further
because since the tool head is not allowed to move away 55 downward movement of the post 208 is permitted.
from the work gear, relatively greater pressure maybe
exerted on portions of the work gear which are at ‘a
‘In order to prevent ‘forces due to inertia of the parts, .
downward movement of the post 208 is controlled at'a
slow rate byva pivoted lever 216 motion of which is con»
greater radial distance from its axis than other portions
trolled through gearing indicated at 218 from a motor
thereof. On the other hand, in the case of relatively
great eccentricity, this condition might conceivably lead 60 220. Reversal of the motor operatesthe lever 216 to
raise the post 208 and adjacent its lower end the post is
to greater than desirable pressure being exerted between
the teeth of the gear and tool, in which case it may be
desirable to permit the tool head to “float” under prede
termined pressure during the operation.
provided with a more abrupt oppositelyinclined cam suri
face 222 engageable with the roller 224 to effect reverse
rocking of the bracket 204 to pull the tool head away
An alternative of course is in the provision of take-up 65 from ‘a work gear after a gear ?nishing operation has been
completed.
means which permits the tool head to move inwardly as
stock is removed from the gear but which either effectively
The drawings and the foregoing speci?cation constitute
a description of the improved gear, ?nishing machine in
such full, clear, concise and exact terms as to enable any
approaches dangerous values.
70 person skilled in the art to practice the invention, the
Mechanism for accomplishing this last result is shown
scope of which isindicated by the appended claims.
prevents movement away from the gear or permits such
movement only when the force between the gear and tool
in the ccpending application of .Kenneth J. Davis, Serial
‘What I claim is:
'
l. A gear ?nishing machine comprising a base, a work
However, in FIGURES 5-7 there is shown mechanism
support on said 'base, said work support including a re}
effective to lock the tool head against relative movement 75 tary work spindle adapted to support a work gear, a tool
No. 817,405, ?led June 1, 1959.
‘
3,046,705
7
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0
of said work spindle, motor means for driving said tool
slide mounted on said base for reciprocation in a plane
parallel to the axis of said work spindle, a cross slide
mounted on said tool slide and including a column, a tool
slide in back and forth traverse strokes, a cross slide on
said tool slide, said cross slide including a column, a tool
supporting and driving assembly mounted on said column
for angular adjustment about a horizontal axis perpendic
ular to and intersecting the axis of said work spindle, said
assembly comprising a frame, a relatively light tool head
supporting and driving assembly mounted on said column
for angular adjustment about an axis perpendicular to
and intersecting the axis of said work spindle, a relative
ly light tool head mounted on said assembly for limited
movement toward and away from said work support, said
mounted on said frame for limited movement toward and
away from said work spindle, said tool head including a
tool head including a rotary tool spindle for supporting a
gear-like tool, said assembly including a drive motor, 10 rotatable tool spindle, a motor on said frame, a driving
transmission on said frame, a drive shaft on said frame
?exible transmission means connecting said motor to said
in substantial axial alignment with said tool spindle, and
tool spindle and providing for movement of said tool
spindle relative to said tool supporting and driving assem
bly, ‘and means for urging said tool head toward said
a universal coupling between said drive shaft and said
tool spindle to permit movement of said tool spindle rel
ative to said drive shaft and relative to said frame.
work support with a predetermined constant force.
6. A gear ?nishing machine comprising a base, a work
2. A gear ?nishing machine comprising a base, a work
support on said base including a rotary work spindle
support on said base, said work support including a ro
having its axis horizontal, a tool slide on said base
tary work spindle adapted to support a work gear, a tool
mounted for movement in a direction generally parallel
slide mounted on said base for reciprocation in a plane
parallel to the axis of said work spindle, a cross slide 20 to the mis of said work spindle, motor means for driving
said tool slide in back and forth traverse strokes, a cross
mounted on said tool slide and including a column, a tool
slide on said tool slide, said cross slide including a col
supporting and driving assembly mounted on said column
for angular adjustment about an axis perpendicular to and
intersecting the axis of said work spindle, a relatively light
tool head mounted on said assembly for limited move
ment toward and away from said work support, said tool
head including a rotary tool spindle for supporting a
gearelike tool, said assembly including a drive motor, ?ex
ible transmission means connecting said motor to said
tool spindle and providing for movement of said tool
spindle relative to said tool supporting and driving assem
bly, and means for urging said tool head toward said
work support with a predetermined constant force, said
?exible transmission means including a universal coupling
permitting movement of said tool head relative to said
tool supporting and driving assembly in a direction per
pendicular to the axis of said tool spindle.
3. A gear ?nishing machine comprising a base, a work
support on said base, said work support including a ro
tary work spindle adapted to support a work gear, a tool
slide mounted on said base for reciprocation in a plane
parallel to the axis of said work spindle, a cross slide
umn, a tool supporting and driving assembly mounted
on said column for angular adjustment about a horizontal
25
tool head including a rotatable tool spindle, a motor on
30 said frame, a driving transmission on said frame, a drive
shaft on said frame in substantial axial alignment with
said tool spindle, and a universal coupling between said
drive shaft and said tool spindle to permit movement of
said tool spindle relative to said drive shaft and relative
35 to said frame, the frame of said tool head including a
horizontal post, said assembly including a recess in which
said post is slidably received to mount said tool head for
limited adjustment thereon relative to the frame of said
tool supporting and driving assembly.
40
mounted on said tool slide and including a column, a tool
supporting and driving assembly mounted on said column
for angular adjustment about an axis perpendicular to
and intersecting the axis of said work spindle, a relatively‘
light tool head mounted on said assembly for limited
movement toward and away from said work support, said
tool head including a rotary tool spindle for supporting a
gear-like tool, said assembly including a drive motor, ?ex 50
ible transmission means connecting said motor to said
tool spindle and providing for movement of said tool
spindle relative to said tool supporting and driving assem
axis perpendicular to and intersectingthe axis of said
work spindle, said assembly comprising a frame, a rela
tively light tool head mounted on said frame for limited
movement toward and away from said work spindle, said
7. A gear ?nishing machine as de?ned in claim 6 and
mechanism for aplying a predetermined and substantially
constant force to move the tool head relative to the frame
of the tool supporting and driving assembly toward and
away from said work spindle.
8. A gear ?nishing machine as de?ned in claim 6 in
cluding mechanism for applying a substantially constant
and uniform force to said tool head to move it toward
said work spindle and means to prevent movement of said
tool head away from said work spindle except under a
predetermined force substantially greater than the force
with which said tool head is urged toward said work
spindle.
9. A gear ?nishing machine as de?ned in claim 8 in
which the means for preventing movement of said tool
55 head away from said work spindle includes a spring.
10. A gear ?nishing machine comprising a base, a
head to provide for engagement between a tool carried
work support including a work spindle for rotatably
by the tool spindle with a work gear at a predetermined
receiving a work gear, means pivoting said support to
pressure and the prevention thereafter of relative radial
said base for movement about an axis perpendicular to
movement between the work gear and a tool on said tool
and intersecting the axis of said work spindle, a tool
spindle.
support including a slide mounted on said base for recti
4. A gear ?nishing machine as de?ned in claim 3, in
linear reciprocation in a direction parallel to the axis of
which said clamping means comprises a pair of clamping
said work spindle, a tool spindle on said tool support,
levers and a block adapted to be clampingly engaged by
means for driving one of said spindles in rotation, means
said levers connected between said tool supporting and
bly, and selectively operable clamping means connecting
said tool supporting and driving assembly and said tool
driving assembly and said tool head, a ?uid piston and 65 for traversing said tool slide in opposite directions, and
crowning and work support stabilizing mechanism com
cylinder mechanism connected between said levers and
prising a pin and slot device extending between and di
means for selectively actuating said mechanism to effect
rectly connecting said work support and tool slide, said
clamping engagement between said levers and said
device comprising an angularly adjustable slotted mem
block to prevent relative movement between said work
spindle and said tool spindle in a direction radial of said 70 ber whose slot may be adjusted into parallelism with the
direction of traverse of said slide to prevent rocking of
said work support during traverse of said slide, or dis
5. A gear ?nishing machine comprising a base, a work
posed at an angle thereto to rock said work support to
support on said base including a rotary work spindle hav
produce crowned work gears.
ing its axis horizontal, a tool slide on said base mounted
11. A gear ?nishing machine comprising a base, a
for movement in a direction generally parallel to the axis 75
work spindle.
3,046,705
9
19
.
horizontal work support including a work spindle f0
ing a base, a main slide mounted for horizontal rectilinear
rotatably receiving a work gear, means pivoting said sup
port to said base for movement about a vertical axis per
movement on said base, a cross slide mounted on said main
slide for horizontal rectilinear movement in a direction
pendicular to and intersecting the axis of said work spin
perpendicular to the path of movement of said main slide,
dle, a'tool support including a slide mounted on said base
a vertical column on said cross slide, a support and drive
assembly comprising a frame connected to one side of said‘
column for angularadjustment about a horizontal axis, a
head of relatively light construction mounted on said frame
for limited rectilinear movement in a direction ‘parallel
for rectilinear horizontal reciprocation in' a direction '
parallel to the axis of said work spindle, a tool spindle
.on said tool support, means for driving one of said spin
dles in rotation, means for traversing said tool slide in
opposite directions, and crowning and work support 10 to the aforesaid horizontal axis, a plurality of guide posts
stabilizing mechanism comprising a pin and slot device
and sleeve bearings connected between said frame and head
extending between and directly connecting said work
to provide substantially free horizontal movement of said
support and tool slide, said device comprising an angu
head, a rotary spindle carried by said head with its axis
larly adjustable slotted member whose slot may be ad
perpendicular to the direction of rectilinear movement of
justed into parallelism with the direction of traverse of 15 said head, a motor on said frame, and transmission means
said slide to prevent rocking of said work support during
connecting said motor and spindle including a drive shaft
traverse of said slide, or disposed at an angle thereto to
generally aligned with an end of said spindle, means
rock said work support to produce crowned work gears.
mounting said shaft for rotation in said frame, and a
‘12. In a gear ?nishing machine, a tool supporting and
flexible drive connection between said shaft and spindle.
driving assembly comprising a frame, a tool head includ 20 15. In a gear honing machine, means for movably sup
ing a tool support spindle, rectilinear guide means mount
porting and driving ‘a gear~like member in rotation com
ing said head on said frame for limited movement per
prising a frame, a head having a rotary spindle therein,
pendicular to the axis of said spindle member, a rotary
guide means mounting said head on said frame for limited
drive shaft member mounted on said frame in a ?xed
rectilinear reciprocation in a direction perpendicular to
position generally aligned with the axis of said spindle 25 the axis of said spindle without angular relative movement
member, a motor on said frame, driving transmission
means connecting said motor and shaft member, a ?exi
ble drive connection including a universal joint connect
therebetween, a motor on said frame, and transmission
means connecting said motor and spindle including a drive
shaft generally aligned with said spindle at one end there
ing said members, one of said members being of hollow
of, and a universal coupling connecting said shaft and
tubular form, said universal joint being located within 30 spindle to provide for limited movement of said head on
said one member.
said frame.
13. In a gear honing machine, means for adjustably
‘ 16. In a gear honing machine, means for movably sup
supporting driving and feeding a gear-like member com
porting and driving a gear-like honing tool in rotation
prising a base, a main slide mounted for horizontal recti
linear movement on said base, a cross slide mounted on
said main slide for horizontal rectilinear movement in
comprising a column, a frame mounted at one side of said
35 column for adjustment about a horizontal axis, a tool head
a direction perpendicular to the path of movement of said
main slide, a vertical column on said cross slide, a sup
port and drive assembly comprising a frame connected
to one side of said column for angular adjustment about
a horizontal axis, a head of relatively light construction
mounted on said frame for limited rectilinear movement
in a direction parallel to the aforesaid horizontal axis,
a rotary spindle carried by said head with its axis per
pendicular to the direction of rectilinear movement of said 45
head, a motor on said frame, and transmission means
connecting said motor and spindle including a drive shaft
generally aligned with an end of said spindle, means
mounting said shaft for rotation in said frame, and a
?exible drive connection between said shaft and spindle. 50
14. In a gear honing machine, means for adjustably sup
porting driving and feeding a gear-like member compris
having a rotary tool ‘spindle therein, means mounting said
head on said frame for limited rectilinear reciprocation ‘
in a direction perpendicular to the axis of said spindle,‘
a motor on said frame, and transmission means connecting
said motor and spindleincluding a drive 'shaft generally
aligned with said spindle at one end thereof, and a uni~
versal coupling connecting said shaft and spindle to pro
vide for limited movement of said head on said frame.
References Cited in the ?le of this patent
UNITED STATES PATENTS
1,575,307
Bachmann __.___, _______ __ Mar. 2, 1926
2,032,589
2,232,408
Overstedt ____________ __.__ Mar. 3, 1936
Shaw ________________ __ Feb. 18, 1941
2,319,117
7 Drummond _______ __.____ May 11, 1943
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