close

Вход

Забыли?

вход по аккаунту

?

Патент USA US3069987

код для вставки
Dec. 25, 1962
J. A. MILLS
3,069,977
GEAR SHAVING OR GEAR FINISHING MACHINES
Filed April 20. 196 0
4 Sheets-Sheet 1
1
“7
\ __L_______,
Dec. 25, 1962
J. A. MILLS
3,069,977
GEAR srmvmc OR GEAR FINISHING MACHINES
Filed April 20. 1960
4 Sheets-Sheet 2
Dec. 25, 1962
J. A. MILLS
3,069,977
GEAR SHAVIN G OR GEAR FINISHING MACHINES
Filed April 20, 1960
4 Sheets-Sheet 3
Dec. 25, 1962
_
J. A. MILLS
'
3,069,977
GEAR SHAVING OR GEAR FINISHING MACHINES
Filed April 20. 1960
4 Sheets-Sheet 4
United States Patent Office
1
3,069,977
GEAR SHAWNG 6R GEAR FINISHING
MACHINES
John Alfred Mills, 24 Kingsley Ave., Melton Park, North
Gosforth, Newcastle-upon-Tyne, England
Filed Apr. 20, 1960, Ser. No. 23,507
Claims priority, application Great Britain Feb. 3, 1960
7 Elaims. (Cl. 90--1.6)
This invention has reference to gear shaving or gear
3,069,977
Patented Dec. 25, 1962
2
centrally positioned tenons 26 of inverted T formation,
which tenons travel in T shaped keyways 27 formed
in the knee. It will be seen that by reason of the frame,
its tenons and the keyways, the shaft and rollers must
travel in a ?xed path which cannot be varied.
The table 15, which carries the stocks or centres by
which the gear to be ?nished is rotatably supported, is
provided with front and rear downwardly extending webs
29 having aligned openings positioned centrally between
the two ends of the table and the projecting ends of the
?nishing machines, hereafter referred to as gear ?nishing
shaft 19 ?t snugly in the said openings. Further the under
machines.
face of the table has a half bearing 30 which makes
It is the common practice to ?nish gears by what is
bearing contact with the shaft.
known as diagonal cross-axes ?nishing. In this method
The shaft is provided with a centrally positioned ver
of gear ?nishing a gear-like cutter and gear having con 15
tical diametrical bore 31. Fitted in this bore is a spindle
jugate teeth are operated in mesh with the axis of the
32. The spindle extends upwardly through the half bear
cutter non-parallel to the axis of the gear and the gear
ing
30 and table 15 and its lower end carries the inner
is traversed in a path which is parallel to neither axis.
My invention relates particularly to machines for ?n
ishing gears by this method of the kind comprising a
frame having an overhanging portion from which de
pends a head, the head being rotatably adjustable about
race 32a of a spherical ball bearing. The outer race 32b
is ?tted within a housing 33 carried by a feed slide 34.
The feed slide, at one end thereof, carries the nut like
member 35. Through this member is screwed a feed
screw 36 which is supported in bearings 37 carried by a
a vertical axis, a knee positioned below said overhanging
rotatable supporting table 38 ?tted in a housing 39 posi
portion, a table carried by the knee and means for travers
ing the table in a path at any desired angle to the axis 25 tioned centrally in the knee. The axis of the rotatable
table is oo-incident with the vertical axis of the head 12.
of the gear, the head and table being adapted to rotatably
Secured to the rotatable table is a downwardly extending
support intermeshing members one of which is a gear
barrel 40 which constitutes a worm wheel and meshing
type cutter and the other the gear to be ?nished and
therewith is a worm 41 fast on a spindle 42. The spindle
either of which is driven.
The invention has for its object to provide in a gear 30 can be rotated by a hand tool and when rotated it rotates
through the worm and worm wheel, the rotatable table
?nishing machine of the kind set forth improved means
38 together with the feed slide and its feed screw. Thus
for supporting and traversing the table in a path at any
by means of the worm and worm wheel the rotatable
desired angle relative to the axis of the gear.
table with feed slide and its screw can be adjusted so
The invention will now be described with reference to
the accompanying drawings wherein—
35 that the screw is in a vertical plane which is parallel to
the path in which it is desired to traverse the table 15.
FIGURE 1 is an elevation of a gear ?nishing machine
The table 38 can be locked in its adjusted position by
of the kind set forth;
means
of two locking devices each consisting of a spindle
FIGURE 2 is a sectional elevation of the knee of said
48 having right and left hand screw threads on which
machine, the knee having a preferred embodiment of the
invention and the section being on the line 2—2 of FIG 40 are screwed clamping shoes 49 provided with concave
faces to bear on the periphery of the rotatable table. By
URE 3;
rotating
the spindle 48 in the appropriate direction the
FIGURE 3 is a plan view partly in section of FIGURE
clamping shoes can be moved towards each other to bear
2 the section being on the line 3-—3 of FIGURE 2;
hard against the periphery of the rotatable table and
FIGURE 4 is a section on the line 4-—4 of FIGURE 2.
thereby
lock it against rotation. The said slide 34 travels
As shown in FIGURE 1 the gear ?nishing machine
in guides 43 provided on the rotatable table 38.
comprises a frame 10 having an overhanging portion 11
The feed screw 36 has fast thereon a bevel wheel 44
from which depends a head 12 which rotatably supports
which meshes with a bevel wheel 45 fast on the upper
a power driven gear type cutter 13, the head being rotat
end of a driving shaft 46 which extends centrally through
ably adjustable about a vertical axis. A knee 14 is posi~
tioned below said overhanging portion and carried by 50 the said horizontal rotatably adjustable supporting table
38. Driving shaft 46 is driven by a motor 47 carried by
the knee is a gear supporting table 15, the gear, which
the
knee through any suitable gearing.
is designated 16, having teeth conjugate with those of
Should it be desired to traverse the table in a path
parallel to the tracks 17 the rotatable support 38 is ad
extending tracks 17. Mounted to roll on the tracks are 55 justed by rotating the spindle 42 so that the feed screw
36 is parallel to said path. The movement of the nut
rollers 18 free on a shaft 19 which extends transversely
like member 35 due to the rotation of the feed screw
of the tracks, the two ends of the shaft extending sub
is transmitted through the slide 34, the spherical ball
stantially beyond the two rollers. The tracks and the
bearing and spindle 32 to the shaft 19. The rollers 18
rollers are hardened and ground. The shaft is guided
for axial movement by means of a horizontal frame 20 60 run on the tracks 17 and the table 15 moves with the
shaft. During such feed of the table there is no axial
having front and rear limbs 21 and 22 provided with
movement
of the shaft. The spindle 32 prevents move
aligned openings 23 in which are journalled hubs 24
ment of the table axially of the shaft.
which are integral with the rollers and extend axially
If the rotatable support 38 is turned so that the feed
therefrom. The shaft 19 passes through said hubs. Suit
screw
36 is now at right angles to the tracks the travel
able means are provided to prevent axial movement of 65
of the slide 34 is such that the movement of the shaft is
the hubs, and therefore the rollers relative to the frame.
at right angles to the tracks and the rollers do not roll
Thus the inner faces of the rollers may bear against the
on
the tracks. The table will, of course, make a like
outer faces of the limbs and retaining circlets 25 inserted
movement. That is, the shaft moves axially relative
in annular grooves in the hubs bear on the inner faces of
to the rollers 18 and hubs 23, the rollers 18 and hubs
the limbs.
70 23 being prevented from axial movement by reason of
The frame 20 at the two ends thereof is provided with
the cutter 13. The gear is supported by stocks 16a.
The knee is provided with front and rear horizontally
the hubs being journalled in the aligned openings in the
3,069,977
3
front and rear limbs 21 ‘of the frame 20 which latter
can travel only in a ?xed path, and the hubs being re
tained in said openings by the retaining circlets 25.
4:
tatably adjustable about a vertical axis, a knee positioned
below said overhanging portion, an upper table carried
by the knee, said head and table being adapted to support
feed of the table is the resultant of a component which
intermeshing members one of which is a gear type cutter
and the other the gear to be ?nished, means for driving
one of said members, front and rear horizontally extend
moves the shaft so that the rollers run on the tracks and
a component which moves the shaft axially, such resultant
rollers which run on the tracks, the transverse member
If now the rotatable support 38 is turned so ‘that the
feed screw is in an intermediate position the direction of
ing tracks carried by the knee, a transverse member with
' being capable of axial movement relative to the rollers
being in a path which is parallel to the feed screw. Thus
and the upper table being mounted on the transverse
10
the direction of the feed of the table relative to the axis
member to travel therewith, a rotatably adjustable lower
of the cutter can be adjusted as desired by adjusting the
table carried by the knee, its axis of rotation being co
said supporting table 38 to a rotary position wherein
incident with the vertical axis of "the rotatably adjustable
the feed screw assumes the direction in which it is de
head, a feed slide and means for feeding the slide carried
sired to feed the table.
by the rotatable table, means forming a driving connec
When the feed is such that the rollers travel on the
tion from the feed slide to the upper table and means
tracks and the shaft is moved axially relative to the
whereby the rotatably adjustable ‘table can be adjusted
rollers it is found that the rotation of the rollers sub
stantially reduces the friction resisting the axial move
about its axis so that the feed means and feed slide as
each having rollers to run on the tracks and in such case
which forms a driving ‘connection between the feed slide
cylinder and piston assembly.
means is in the form of a feed screw, means for rotat
sume a position corresponding to the desired path of
ment of the shaft.
Provision is made for the lubrication of the rollers 20 traverse of the upper table, the arrangement being such
that the upper table will be traversed in the path pre
and their extended hubs. Thus the shaft may be pro
determined by the setting of the feed means.
vided with axial oil passages communicating with verti
3. A machine as claimed in claim 2 wherein the trans
cal passages which terminate between the hubs and the
verse
member is provided with a frame which co-operates
holes in the frame in which they are ?tted.
The gears are ?nished in known manner by bringing 25 with ?xed guide means by which the frame is con~
strained to travel in a ?xed path to maintain parallelism
them into mesh with the cutter which is driven, and
of the transverse member and thereby maintain a pre
traversing the table and therefore the gear carried thereby
determined angular relationship of the gear to the cutter
in a path which is parallel neither to the axis of the
during the traverse of the upper table.
cutter nor to the axis of the gear.
4. A machine as claimed in claim 2 wherein the trans
The rollers may take the form of spur wheels which 30
verse
member is provided with a centrally positioned
mesh with ?xed racks, such racks constituting the tracks.
diametrically extending bore in which is housed a spindle
If desired the table may be carried by a pair of shafts
and the transverse member and therefore the supporting
the feed is transmitted directly to the table 15.
In lieu of the feed screw and the nut-like member the 35 table carried by the transverse member.
5. A machine as claimed in claim 1 wherein the feed
slide may be traversed by a hydraulic or compressed air
ing the screw and a nut-like member carried by ‘the feed
What I claim is:
slide and in engagement with the feed screw.
1. A gear ?nishing machine comprising a frame having
6. A machine as claimed in claim 1 wherein the trans
an overhanging portion from which depends a head ro 40
verse member is provided with a frame which cooperates
tatably adjustable about a vertical axis, a knee positioned
with ?xed guide means by which the frame is constrained
below said overhanging portion and a table carried by
to travel in a ?xed path to maintain parallelism of the.
the knee, said head and table being adapted to support
transverse member and thereby maintain a predetermined 3
intermeshing members one of which is a gear type cutter
angular relationship of the gear to the cutter during the
and'the other the gear to be ?nished, means for driving
traverse of the gear supporting table.
one of said members, front and rear horizontally extend
7. A machine as claimed in claim 1 wherein the trans
ing tracks carried by the knee, a transverse member
verse member is provided with a centrally positioned
with supporting means which travel on the tracks, the
diametrically extending bore in which is housed a spindle
transverse member being capable of axial movement rela
which forms a driving connection between the feed slide
tive to the supporting means and the table being mounted
and the transverse member and therefore the supporting
on the transverse member to travel therewith, a feed
table carried by the transverse member.
slide by which said transverse member and table is
traversed and means for traversing the slide, the feed
References Cited in the ?le of this patent
slide and means for traversing the slide being adjustable
about a vertical axis so that they can be set to corre
spond to the desired line of traverse of the table.
2. A gear ?nishing machine comprising a frame having
an overhanging portion from which depends a head ro
55
UNITED STATES PATENTS
2,542,569
2,561,706
Praeg _______________ __ Feb. 20, 1951
Miller _______________ __ July 24, 1951
Документ
Категория
Без категории
Просмотров
0
Размер файла
491 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа