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Патент USA US3049037

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Aug- 14, 1962
G. SCHAMING
3,049,029
PRESSES
Filed Sept. 9, 1958
5 Sheets-Sheet 1
56.3
FIG-l
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Aug. 14, 1962
G. SCHAMING
'
Filed Sept. 9, 1958
3,049,029
PRESSES
56.2
5 Sheets-Sheet 2
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Aug- 14, 1962
G. SCHAMING
3,049,029
PRESSES
Fi1ed sept- 9, 1958
56.7
5 Sheets-Sheet 4
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Aug. 14, 1962
G. SCHAMING
3,049,029
PRESSEIS
Filed Sept. 9, 1958
5 Sheets-Sheet 5
m. n
64
3,649,929
Patented Aug. 14, 1962
2
FIG. ‘6 is a section showing the arrangement for the
supply of ?uid in FIG. 5;
FIGS. 7 and 8 are enlarged details respectively in lon
gitudinal section and in section along the line VIII--VIII
of FIG. 7, showing means for varying the stroke of the
3,049,029
PRESSES
Guillaume Schaming, Le Perreux, France, assignor to
Societe Anonyme Schostal, Vaduz, Liechtenstein, a so
ciety of Liechtenstein
extractor;
Filed Sept. 9, 1958, Ser. No. 759,878
Claims priority, application France Sept. 13, 1957
5 Claims. (Cl. 74-785)
FIGS. 9 to 11 are part sectional details of a brake for
the press.
As represented in FIGS. 1 and 3, the press comprises
The present invention refers to mechanically operated 10 a frame 1, a slide block 2, a shaft 3‘ having an eccentric
presses comprising a slide-block actuated by a connecting
rod driven by an eccentric or crank shaft.
The invention comprises improvements in such presses,
or crank-throw 4, and a connecting rod 5 mounted on the
eccentric, the other end of which is attached to a pin or
gudgeon 6 for connection with the slide block 2. It also
especially for improving their operation, by rendering it
comprises a table 7 provided with an extractor device 8'.
The press is driven, for example by an electric motor
(not shown) by means of V-belts passing over a grooved
is secured to a plate on which there are rotatably mounted
pulley 9, the shaft 3 being driven through a clutch, which
planet pinions engaging with a stationary outer gear ring
may be controlled mechanically, electro-magnetically or
by ?uid under pressure.
and with a central pinion secured to the driving member
of the press. Thus, with a driving member rotating at a 20
In the embodiment represented in FIG. 2, the press is
relatively high speed, there can be obtained a suf?ciently
driven through a clutch with electro-magnetic control.
low speed of the eccentric or crank shaft. Such an
In this embodiment, the pulley 9, concentric with the
arrangement permits of driving the press by means of an
shaft 3, is secured to a plate .10 inside which there is
electric motor, and reducing its speed simply by a normal
provided a magnet winding 11. Beside this plate there
belt-pulley transmission, without having to use mechani 25 is mounted a ring 12, connected thereto by means of rods
cal reduction gearing of the usual type, with a small pinion
13 slidable against springs 14, in such a way that, while
keyed on the motor shaft and a large-diameter gear wheel
rotating with the plate 10, the ring 12 can move axially
keyed on the driving shaft of the press. Furthermore, by
in relation thereto. The plate 10 and the ring 12 are
reason of the use of a plurality of symmetrically disposed
made of magnetic material, forming an electro-magnet
planet pinions, a balanced drive is obtained, exerted at 30 energized by the winding 11. In the air-gap of this
a plurality of points, instead of at one single point as in
electro-magnet there is provided a disc 15 ?tted with
the usual arrangements.
linings 116 of a material having a high coef?cient of fric
In accordance with another feature of the invention, the
tion. This disc is connected by a spider or plate 19 to a
connection between the driving member of the press and
pinion 17 rotatably mounted on the shaft 3. The supply
the source of power is effected by means of a friction 35 of electric current to the winding 11 is effected by means
clutch controlled mechanically, electromagnetically or by
of brushes 18a contacting with conductor rings 18 carried
pressure ?uid, which permits a slipping action in the case
by the pulley 9 and connected to the winding 11.
of an excessive force exerted upon the press.
When the electromagnet 10, 12 is energized, the mov
The invention also comprises an arrangement whereby
able ring or armature 12 is ‘attracted towards the plate
the pin or gudgeon coupling the sliding block of the press 40 10, and the disc 15 is frictionally connected to the pulley
with the connecting rod is mounted eccentrically at its
9, the movement of the latter being thus transmitted to
more certain and more ?exible.
15
According to the invention, the eccentric or crank shaft
two ends, so that the eccentricity can be varied and con
sequently the position of the slide block in relation to the
lower table can be adjusted for the working stroke of the
tools operated by the press. This adjustment can be
the pinion 17.
This pinion 17 engages with planet pinions 20, for ex
ample four in number and spaced at 90° apart. These
pinions rotate on spindles 21 carried by a plate 22 keyed
effected micrometrically by means of a worm actuated 45 to the shaft 3, and they also engage with a stationary
outer gear ring 23 secured to the frame 1 of the press.
from the exterior and in engagement with a toothed ring
provided on the eccentric pin or gudgeon coupling the
connecting rod to the slide block.
For the guidance of the slide block, detachable slide
ways of considerable length are used, which increase the 50
bearing surfaces of the guides. These slide-ways may be
removable, as by mounting them in dovetailed grooves
on the sides of the slide block.
The invention enables the eccentric or crank shaft to
Thus the shaft 3 is driven for operation of the crank
4 through the intermediary of the planet pinions 21, the
gear-ratio between said pinions and the central pinion 17
being selected in such a way that a suitable reduction of
speed is obtained.
In the embodiment represented in FIGS. 5 and 6, the
press is driven through a clutch with pressure-?uid con
trol. The pulley ‘9 is here shown secured to a plate 30
be made in one piece, the connecting rod being also made
concentric with the shaft 3 and on which there is ?xed
in one piece or provided with a divided bearing cap at
an annular plate 31, also concentric with the shaft. As
one end.
in the preceding embodiment, the means for driving the
Other objects and advantages of the invention will here
press comprises a toothed pinion 17 rotatably mounted
inafter appear from the following description of suitable
on the shaft 3, and planet pinions 20 rotatable on spindle
embodiments given simply by way of example, with ref
21 carried by a plate 22 secured to the shaft 3, these
erence to the accompanying drawings, wherein:
planet pinions engaging with an outer toothed ring 23
FIG. 1 is an elevation of the press;
secured to the frame of the press.
FIG. 2 is an enlarged detail of the device for driving
In the annular plate 31, there is mounted in ?uid
the press by means of an electro-magnetically controlled
tight manner an elastic diaphragm 32, facing which there
clutch;
65 is provided an annular plate 33 adapted to press against
FIG. 3 is a section along the line III-III in FIG. 1;
a ring 34 which is secured to rods 35 slidable in the plate
FIG. 4 is an enlarged detail of a device for adjusting
30 against the action of springs 36.
the position of the slide block in relation to the table of
In the space between the ring 34 and the internal face
the press;
of the plate 30, there is provided a disc 40 which is se
FIG. 5 is an enlarged detail in section of another em
cured to the pinion 17. Linings 37 of a material having
bodiment of the device for driving the press by means 70 a high coe?icient of friction are provided between the disc
of a clutch controlled by pressure ?uid;
40 and the plate 30 and ring 34 on opposite sides thereof.
3,049,029
A.
3
When the press is idle, the springs 36 cause the ring
34 to move away from the plate 30, the clutch being
free. To operate the shaft 3 of the press, pressure ?uid
is admitted between the plate 31 and the diaphragm 32;
the latter therefore presses back the parts 33, 34, so that
the disc 44) is driven by the friction linings 37. The cen
tral pinion 17 is thus driven and the press operates as
in the preceding example. The bearings provided upon
ring 64, and parallel to its axis, there are slidably mounted
two plates 65, 66 carrying linings 67, 68 of a material
having a high coe?icient of friction. As seen in FIG. 9,
these two plates have aligned holes through which there
pass members 69 each having a shoulder 70 and each en
gaged internally by a screw-threaded rod 71, also having
a shoulder 72. A compression spring 73 bears at one
end on the inner plate 66 and at the other end on the
shoulder 72 of the rod 71, bringing the two plates towards
ranged in such a way as to permit the slight longitudinal 10 one another and thereby effecting a braking action upon
the central disc 62 secured to the shaft 3.
play necessary for the clutch engagement and disengage
In a chamber 85 inside the ring 64, as seen in FIG. 10,
ment.
there are provided two cheek plates 74, 75, concentric
As represented in FIG. 6, pressure ?uid from a distrib
with the axis of the shaft 3, and movable in relation to
utor working in timed relation with the press, is delivered
through a conduit 41 opening into a rotary joint member 15 one another. These two cheek plates are mounted on a
plate 76 fixed on the ring 64, being assembled thereto by
42 in axial relation to the shaft 3 of the press.
means of rings 77, 78 secured to the plate 76, and on
This joint 42 is connected by conduits 43, 44, leading
which the cheek plates 74, 75 can slide.
through radial grooves 45 provided on the plate 31 to a
The part 76a of the plate 76 ‘comprises a channel 79
circular channel 46. The conduits 43, 44 may be ar
ranged in threes, disposed at 120° apart, in order to ob 20 in communication through a joint member 80 and a pipe
81 with a source of pressure ?uid. The channel 79 opens
tain a good distribution of the pressure ?uid and properly
balanced action.
out through ports ‘82 into the space included between
the shaft 3 and the parts driven by the disc 40 are ar
The pin or gudgeon 6, by which the connecting rod 5
is attached to the slide block 2 of the press, is preferably
the cheek plates 74, 75.
The check plate 74 contacts with gudgeons 83 secured
made eccentric at its two ends. Variation of this eccen 25 to the plate 65. The cheek plate 75 is secured to gudgeons
tricity is effected by means of a worm 25 mounted on
84 fast with the plates 66, as shown in FIG. 11.
the slide block and capable of being controlled from
the exterior by means of a square end 26, as seen in
FIG. 4. This tangential worm ‘25 engages with a toothed
When the press is in operation, pressure ?uid is intro
duced through the pipe 81 into the space between the
cheek plates 74, 75. The result is a lateral pressure be
ring 27 provided on the pin 6. By turning the pin 6, 30 tween these two cheek plates which pushes them apart
the eccentricity can be varied, whereby the limiting posi
and consequently thrusts the plate 65 outwards and draws
tion of the slide block in relation to the table 7 can be
the plate 66 inwards, against the action of the spring 73.
adjusted. Means may be provided for locking the pin in
Thus there is no braking of the press while in operation,
the position which has been adjusted in this way.
but breaking is exerted ‘as soon as the supply of the pres
In order to improve the guiding of the slide block 2, 35 sure ?uid stops.
'
there may be attached on the uprights 23 parallel slide
The press may be provided with cams for ensuring the
ways 29 of considerable length, these slide-ways being
control of its various operations, and with the usual ac
preferably mounted on dovetails and secured by any
cessories.
appropriate means.
The invention is not limited to the forms of embodi
It will be observed that the crank shaft 3 is in one 40 ment described, but can be carried out in accordance with
single piece with its eccentric or crank throw 4. The
various modi?cations within the scope of the appended
same applies to the connecting rod 5, which may how
claims.
ever be ?tted with a divided bearing at one end.
What I claim is:
The press can be provided with means for extraction
l. A mechanically operated press comprising, in com
of the work-pieces, having a stroke continuously variable 45 bination, a press frame; a slide reciprocable in said press
by shifting the fulcrum of the actuating lever, such an
frame; a drive shaft turnably mounted in said press frame;
arrangement being represented in FIGS. 7 and 8. The
means operatively connected to said shaft and said slide
extractor 8, which may be multiple or may be arranged
for reciprocating said slide upon turning of said shaft;
as a movable pressure table, is operated by means of links
a combined pulley and ?ywheel member turnably mounted
A control member
on said shaft; a sun gear turnably mounted on said shaft;
59 acts through a joint 52 and an articulation 53 upon
one end of this ‘lever, the other end of which is mounted
on a fulcrum 54 which is movable in relation to the
frame of the press. In the form of embodiment repre—
50 articulated at 50a on a lever 51.
said sun gear and in meshing engagement therewith;
support means for supporting said planet gears and being
?xed to said shaft for rotation therewith; an outer gear
sented, the lever 51 formed of two side-pieces having
slotted engagement with a die or fulcrum 54 adjustable
along slideways 55, the die forming a nut for a screw 56
which can be operated from the exterior.
It will be seen that by turning this screw, the die or
nut is shifted bodily along the slideways, and that conse
quently the fulcrum position of the lever 51 varies, there
by allowing for longer or shorter stroke of the extractor.
The press may be provided with a braking device
mounted at the end of the crank shaft, and adapted for
a plurality of planet gears uniformly distributed about
ring surrounding said planet gears in meshing engagement
with the latter, said outer gear ring being ?xedly carried
by said press frame; and clutch means interposed between
said combined pulley and ?ywheel member and said sun
gear for connecting and disconnecting said member to and
from said sun gear.
2. A mechanically operated press comprising, in com
bination, a press frame; a slide reciprooable in said press
frame; a drive shaft turnably mounted in said press
frame; means operatively connected to said shaft and
actuation by any appropriate means, for example electro 65 said slide for reciprocating said slide upon turning of said
shaft; a combined pulley and ?ywheel member turnably
In FIGS. 9 to 11, there are represented three radial
mounted on said shaft, said combined pulley and fly
sections, taken at different angular positions, of a disc
wheel member having ‘an outer rim portion and a ?ange
braking device mounted on the crank shaft 3 on the
portion extending transverse to said outer rim portion
side of the press opposite to that Where the driving pulley
from one side of the latter, the inner surfaces of said
is mounted.
portions de?ning a substantially cylindrical hollow space
pneumatic.
On the shaft 3, there is keyed a sleeve 60, on which
there is ?xed by screws 61 a disc 62. Furthermore, a
ring 64 is mounted by screws 63 on the press frame 1.
in said member; a sun gear turnably mounted on said
shaft; a plurality of planet gears uniformly distributed
about said sun gear and in meshing engagement there
Engaging in grooves formed on the outer edge of this 75 with; support means for supporting said planet gears
3,049,029
5
6
and being ?xed to said shaft for rotation therewith; an
outer gear ring surrounding said planet gears in meshing
engagement with the latter, said outer gear ring being
?xedly carried by said press frame; and clutch means
interposed between said combined pulley and ?ywheel
member and said sun gear for connecting and discon
4. For use in a machine as recited in claim 3, said
frame having a side surface beyond which said drive shaft
extends and said ring gear being ?xed to and located ad
jacent said side surface of said frame, said support means
being located between said planetary gears and said side
surface of said frame and said clutch means being lo
cated adjacent to said sun gear ‘and planetary gears at
the side ‘of the latter opposite from said support means.
necting said member to and from said sun gear, said gears
and clutch means being located in said hollow space of
said combined pulley and ?ywheel member.
3. For use in a machine such as a mechanically oper
5. For use in a machine as recited in claim 4, said
10 pulley also acting as a ?ywheel and being freely turnable
ated press or the like, in combination, a stationary frame;
on a free end portion of said shaft at the part thereof
a rotary drive shaft carried by said frame; a sun gear
extending beyond said side surface of said frame, said
pulley being hollow, having a free annular edge portion
coaxially surrounding and freely turnable with respect
to said shaft; an outer ring gear having inner teeth di
located adjacent said side surface of said frame and all
rected toward said sun gear, said ring gear coaxially sur 15 of said gearing, said support means, and said clutch means
rounding and ‘being spaced from said sun gear and said
being housed within said hollow pulley.
ring gear being ?xedly carried by said stationary frame
so that said ring gear also is stationary; a plurality of
planetary gears located between and meshing with said
sun gear and ring gear; support means supporting each 20
of said planetary gears for free rotary movement about
its axis, said support means being ?xed to said ‘drive ‘shaft
so that movement of the planetary gears about the axis
of said ‘drive shaft transmits a drive thereto; a rotary
driving pulley coaxial with said drive shaft and located
adjacent said gears; and friction clutch means operatively
connected to said pulley and sun gear for transmitting a
drive from said pulley to said sun gear when said friction
clutch means is engaged, whereby said drive shaft will
be driven from said pulley at a substantially lower speed 30
than said pulley when said clutch means is engaged and
whereby said clutch means can slip even when engaged
to prevent damage to other elements.
References Cited in the file of this patent
UNITED STATES PATENTS
311,255
Pedersen ______________ ._ Jan. 27, 1885
1,675,669
Snyder _______________ __ July 3, 1928
2,151,890
2,280,849
Bobst ________________ __ Mar. 28, 1939
Pocock _____________ __ Apr. 28, 1942
2,523,393‘
2,553,521
Rhodes ______________ __ Sept. 26, 1950
Reitberger ___________ __ May 15, 1951
2,577,641
2,608,253
2,755,147
2,781,879
2,818,798
Wissman _______________ __ Dec. 4,
Battles ______________ .__ Aug. 26,
Ernst _______________ __ July 17,
Ebersold _____________ __ Feb. 19,
Deykin _______________ __ Jan. 7,
1951
1952
1956
1957
1958
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