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Патент USA US2405635

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Aug. 13, 1946.
A. BECHLER
2,405,635
' DEVICE FOR RETARDING THE DISENGAGEMENT OF AN AUTOMATIC MACHINE
FilQd April 16, 1945
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Patented Aug. 13, 1946
2,405,635
UNITED STATES PATENT OFFICE
2,405,635
DEVICE FOR RETARDING THE DISENGAGE
MENT OF AUTOMATIC MACHINES
André Bechler, Moutier, Switzerland
Application April 16, 1945, Serial No. 588,628
In Switzerland April 24, 1944
5 Claims.
(Cl. 51—.-50)
1
2
This invention relates to a device for retarding
the disengagement of an automatic machine.
In certain machines as, for instance, in auto
The mainshaft of the machine drives by a
toothed gearing H a worm l2 engaging a worm
wheel. A cam I 3 is ?xed to the Worm wheel, con
matic grinding or screwing machines, owing to
trolling the longitudinal movement of the tool
carrier M.
For this purpose a lever i5 is provided, pivoted
at It on the frame, Which,,under the in?uence
the de?ection of the tool holders under the effect
of the force necessary for removing the chips or
for holding the grinding tool against the work
piece, the position of the tool with regard to the
of a spring I‘! abuts by means of a roller on the
Work piece is, at the end of its transverse stroke,
cam !3. This spring i7, is, at the one end, ?xed
not always the same and, in consequence, the last 10 to the frame and, at the other end, to a pin l8
diameter machined is not equal from work piece
attached to an extension it of the carrier l4 con
to work piece. In machines attended to by hand
nected with the lever I5 by means of a rod 29.
it is usual to make some additional longitudinal
On the extension i9 of the carrier It a lever
movements in the transverse end position of the
2| is pivoted, having, on one end, a notch 22 and
tool in order to be quite sure with regard to the
on the other end, an adjustable feeler 23 cooper
de?nite dimension of the work piece.
ating with a pawl 25, by means of which the
Object of this invention is to arrive at the
ratchet wheel H! can be gradually operated.
same result in automatic machines by retarding
Lever 25 carries, besides, a weight 24 for tilting
their disengagement which, up till now, has been
the same in order to bring the feeler 23 under
controlled by the stop for the transverse stroke 20 the pawl 25 and to rotate the ratchet wheel in
of the tool carrier. The retarding device form
for bringing the driver 9 in contact with feeler
ing the object of the present invention comprises
8 and, in this way, for disengaging the main
a mechanism for disengaging the machine, which
shait by opening the clutch 3.
only becomes active after a certain number of
The carrier !4 carries a grinding wheel 26
supplemental longitudinal movements after the 25 driven by a pulley 2'1. The longitudinal move
stop of the transverse carrier.
ments of the carrier imparted by the cam I 3 make
The said disengaging mechanism comprises by
the grinding Wheel penetrate into the driver 28
preference a driver whose initial position is ad
which a ring 29 is clamped fast, whose inside
justable in order to determine the number of
is to be ground. The carrier i4; is, in a usual
these supplemental longitudinal movements. - manner, mounted on a slide whose transverse
This driver is ?xed to a ratchet Wheel which is
movement is caused by a spring 35 and controlled
only operated by the longitudinal movements of
by a screw 34 to the end of which a ratchet wheel
the carrier after the termination of its transverse
lit is ?xed. This latter is, on each termination
stroke. For this purpose a lever is used, which
of the longitudinal stroke of the carrier l6, ro
is released on the contact of the stops for the
tated by a certain angle by means of a lever 3|
transverse stroke of the carrier.
controlling the pawl 32 and displaced at the end
The accompanying drawing illustrates, by way
of the longitudinal stroke by means of a stop 33
of example, a device for retarding the disengage
?xed to the frame I. At the end of each longi
ment in an internal grinding machine,
Fig. 1 is an elevation of the whole device and of
certain parts of the machine, which are neces
sary for the comprehension of the invention,
Fig. 2 is a view of the carrier, on a greater
scale,
Fig. 3 is an elevation of a detail.
The frame I of the machine in question car
ries a ?xed headstock 2. Between the bearings
a clutch 3 is mounted ‘by means of which the
shaft 4 of the machine can be coupled with a
pulley 5, driven by a non-illustrated transmission. '
This clutch 3 is controlled by means of a lever
6, pivoted at 1 on one of the bearings. On its
lower end it has a feeler 8 lying in reach of a
driver 9 ?xed to a ratchet wheel l0 loosely mount
ed on an axle attached to the frame.
lU
tudinal stroke of the tool carrier M the screw 34
is rotated by a certain angle in order to allow the
carrier Hi to advance.
The end of the transverse stroke of the tool
carrier is limited by the screw 36 which then
abuts on a stop 31 under which the notched end
of the lever 2| is held by a piston 38 which is
under the in?uence of a spring 39 and which has
an extension 40 coaxial to the screw 36 and tra
versing the stop 31,
At the end of the transverse stroke, this screw
36 abuts on the extension 40 and releases lever
2|, which under the in?uence of the weight 24,
tilts in order to bring the feeler 23 into contact
with the pawl 25. On each stroke of the carrier,
strokes which, owing to the abutment of the
screw 36 on the stop 31, have no in?uence what
\ \
2,405,635
4
3
ating device for said carrier, and a device for
ever upon the transverse position of the tool, the
retarding the disengagement of the automatic
ratchet wheel I0 is rotated by one tooth and,
machine, comprising a mechanism for the dis
according to the initial position given to it, more
engagement of the machine, arranged to become
or less supplemental longitudinal movements are
only active after a certain number of supple
necessary in order to bring the driver 9 into
mental longitudinal movements at the end of the
contact with the feeler 8 and to open the clutch
transverse stroke of said carrier, a ratchet-wheel,
3. The moment of the opening 01-‘ the clutch, that
a lever coupling said longitudinal operating de
is of the disengagement of the machine, therefore,
vice and said ratchet-wheel, arranged to be re
no longervcorresponds to the end of the trans
verse stroke of the tool carrier [4. It is, there 10 leased on the contact of said stops, and a driver
- ?xed to said ratchet-wheel and destined to act
fore, possible in this extreme position of the
upon said mechanism, the initial position of said
grinding wheel to execute a certain number of
driver being adjustable in order to determine the
longitudinal movements which are more or less
number of supplemental longitudinal movements
effective according to the conditions under which
the preceding work has been effected, but which 15 of said carrier.
4. In an automatic machine, a tool carrier ar
?nally result in dimensions of the work piece
ranged to carry out longitudinal movements and
a transverse stroke, stops for stopping the trans
vversevstroke of said carrier, a longitudinal oper
corresponding to the normal tolerances of the
machine.
If it be a question of another machine, e. g.
an automatic screwing machine, the principle of 20 ating device for said carrier, and a device for
retarding the disengagement of the automatic
machine, comprising, a mechanism for the dis
engagement of the machine, arranged to become
What I claim is:
only active after a certain number of supple
1. In an automatic machine, a tool carrier ar
ranged to carry out longitudinal movements and 25 mental longitudinal movements at the end of the
transverse stroke of said carrier, a ratchet-wheel,
a transverse stroke, an adjustable stop destined
a lever coupling said longitudinal operating de
to limit said transverse stroke, and a device for
vice and said ratchet-Wheel. arranged to be held
retarding the disengagement of the automatic
by friction in inactive position and to be re
machine comprising, a mechanism for the dis
engagement of the machine, arranged to become 30 leased on the contact of said stops and a driver
?xed to said ratchet-wheel and destined to act
only active after a certain number of supple
upon said mechanism, the initial position of said
mental longitudinal movements at the end of
driver being adjustable in order to determine the
the transverse stroke of said carrier, a ratchet
number of supplemental longitudinal movements
wheel operable only after stopping of said car
of said carrier.
rier, and a driver ?xed to said ratchet-wheel and
5. In an automatic machine, a tool carrier ar
destined to act upon said mechanism, the'initial
ranged to carry out longitudinal movements and
position of said driver being adjustable in order
a transverse stroke, stops for stopping the trans
to determine the number of supplemental longi
verse stroke of said carrier, :1. stop screw, a spring
tudinal movements of said carrier.
2. In an automatic machine, a tool carrier 40 controlled piston, having an extension traversing
one of said stops, a longitudinal operating device
arranged to carry out longitudinal movements
construction of the retarding device would be the
same.
for said carrier, and a device for retarding the
and a transverse stroke, an adjustable stop des
disengagement of the automatic machine, com
tined to limit said transverse stroke, a longitu
prising, a mechanism for the disengagement of
dinal operating device for said carrier, and a
device for retarding the disengagement of the 45 the machine, arranged to become only active
after a certain number of supplemental longi
automatic machine, comprising, a mechanism for
tudinal movements at the end of the transverse
the disengagement of the machine, arranged to
stroke of said carrier, a ratchet-wheel, a lever
become only active after a certain number of
coupling said longitudinal operating device and
supplemental longitudinal movements at the end
of the transverse stroke of said carrier, a ratchet 50 said ratchet-wheel, arranged to be held under said
stop by means of said spring controlled piston
wheel arranged to be driven by said longitudinal
and to be released on the contact of said stops,
operating device only after stopping of said car
and a driver ?xed to said ratchet-wheel and des
rier and a driver ?xed to said ratchet-wheel and
tined to act upon said mechanism, the initial po
destined to act upon said mechanism, the initial
position of said driver being adjustable, in order 55 sition of said driver being adjustable in order to
determine the number of supplemental longitu
to determine the number of supplemental longi
dinal movements of said carrier, said extension
tudinal movements of said carrier.
being arranged to cooperate with said stop screw
3. In an automatic machine, a tool carrier ar
for releasing said lever.
ranged to carry out longitudinal movements and
a transverse stroke, stops for stopping the trans
verse stroke of said carrier, a longitudinal oper
60
ANDRE BECHLER.
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