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Патент USA US3090296

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May 21, 1963
H. KEsTEL
3,090,286
SWING SYSTEM FOR A MOTOR-DRIVEN AND
MANUALLY-GUIDED WORKING DEVICE
Filed Oct. 4, 1960
FIG. l.
5 Sheets-Sheet 1
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INVENTOR
BYz
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ATTORNEY.
May 21, 1963
Filed oct. 4,' 1960
H. KESTEL
SWING SYSTEM FOR A MOTOR-DRIVEN AND
3,090,286
MANUALLY-GUIDED WORKING DEVICE
5 Sheets-Sheet 2
lNVENTOR
BY
E @l
ATTORNEY.
May 2l, 1963
H. KESTEL
SWING SYSTEM FOR A MOTOR-DRIVEN AND
Filed Oct. 4, 1960
3,090,286
MANUALLY-GUIDED WORKING DEVICE
3 Sheets-Sheet 3
FIG. 4.
INVENTOR
WML@ ma
„Yi
ATTORNEY.
United States Patent O " ,.ICC
1
2
for instance of the tamping plate, which again leads to a
3,090,286
better stability and, thereby, a safer guidance of the de
SWING SYSTEM FOR A MGTOR-DRIVEN AND
MANUALLY-GUIDED WORKING DEVICE
Heinrich Kestel, Munich, Germany, assignor to Herman
Wacker and Peter Wacker, Munich, Germany
Filed Oct. 4, 1960, Ser. No. 60,330
Claims priority, application Germany Oct. 24, 1959
2 Claims. (Cl. 94-49)
magst
Patented May 21, 1963
vlce.
It is yet another object of the present invention to
5 provide a swing system for a motor-driven and manually
The present invention relates to a swing system for a
motor-driven and manually-guided working device.
There are two different types of such working devices
known, wherein the tool performs reciprocating working
movements. The driving motor is in these arrangements
either rigidly or exchangeably connected with the work
ing device. The power transfer from the driving motor
to Ithe swing system is brought about by means of a
pinion mounted on the shaft of the driving motor, a gear
meshing with the pinion and a crank drive. A connect
ing rod is operated from the crank drive.
guided working device, wherein the guiding cylinder is
connected with a tool by means of a clamping ring and
one or a plurality of conically or wedge-shaped clamp
ing elements, which are disposed between inter-engaging
faces of the guiding cylinder and a sleeve rigidly con
nected with the too‘l, respectively. The guiding cylinder
and the tool can be also easily exchangeably connected
with each other by means of conically inter-engaging
bushings.
Between the guiding cylinder and the outer cylinder
forming the housing of the working device, particularly
dirt-ejecting elements can be interposed.
With these and other objects in view which will be
come apparent in the following detailed description, the
present invention will be clearly understood .in connec
In one of the known embodiments of such working 20 tion with the accompanying drawings, in which:
devices, a piston is pivotally connected to the lower end
FIGURE 1 is an axial section of the structure of the
of the connecting rod by means of a pivot bolt, which
swing system for a motor-driven and manually-guided
piston performs in a housing of the working device a
reciprocating movement. The piston carries a piston
rod on which a ‘beater piston is guided by means of an 25
intermediate arrangement of one or a plurality of springs.
The beater piston performs during the reciprocating
working device, designed in accordance with the present
invention;
FIG. 2 is a section along the lines 2_2 of FIG. l;
FIG. 3 is a fragmentary axial section of another em
bodiment of the lower portion of the device;
FIG. 4 is a section along the lines 4_4 of FIG. 3;
latter and hits during one stroke of the working cycle
and
30
always the tool mounted in the lower part of the hous
FIG. 5 is a section along the lines 5--5 of FIG. 4.
ing of the device.
Referring now to the drawings, and in particular to
In a second known embodiment of such devices, the
FIGS. 1 and 2, the structure comprises a motor 1°, the
connecting rod engages a cylinder which is axially mov
shaft of which car-ries a pinion 1', the latter meshing
able in the housing of the device. Inside of this movable
with a gear 2° operating a crank drive 3’ including a
cylinder is disposed a piston, which is supported by
connecting rod 1, which constitutes the driving means
springs between the end bottoms of the cylinder. The
for the tool 5. The free end of the connecting rod 1
piston is operatively connected with the tool and the
is connected with the free end of a piston rod 2 by means
latter is exchangeably mounted at the lower end of the
of a pivot bolt 3, the piston rod 2 carrying a piston 2'.
device.
40 The latter `slides in a guiding cylinder 6 which is either in
The springs disposed above and below the piston are
tegrally „or exchangeably connected with the tool 5.
alternately compressed during the reciprocating move
Springs 8 and 9 are ldisposed between the two opposite
ment of the piston rod and of the cylinder and impart
faces of the guiding piston 2’ and the corresponding
a reciprocating movement to the piston which is con
opposite bottom members 6’ and 6” of the guiding
nected with the tool.
45 cylinder `6. The guiding cylinder 6 which carries the
It is one object of the present invention to provide a
tool 5, for instance a tamping plate, slides in the outer
swing system for a motor-driven and manually-guided
cylinder 4 which forms the housing of the working de
working device wherein the connecting rod of the crank
vice.
drive is connected with the piston rod of a guiding piston
The guiding cylinder 6 is connected with the tool 5
by means of a pivot bo'lt and wherein the guiding piston 50 by means of a clamping ring 12.
slides in a guiding cylinder either rigidly or exchange
The bottom portion of the guiding cylinder 6 is sur
ably connected with the tool by intermediate arrange
rounded by a sleeve member :11 and pairs of conical
ment of springs disposed between the guiding piston and
or wedge-shaped elements 10 are disposed between the
the bottom-s of the guiding cylinder, and wherein addi
outer face of the guiding cylinder 6 and the inner face
tionally, the guiding cylinder connected with the tool 55 of the sleeve member 11. The clamping ring l2 has an
is axially movable in an outer cylinder forming the hous
outer thread engaging the complementary inner thread
ing of the working device.
of the sleeve member 11. As indicated in FIGS. l and 2,
The present invention brings about the advantage, in
disclosing one embodiment of the present invention,
comparison with the known beating and swinging sys
the lower end of the clamping ring 12 abuts the wedge
tem, that a particularly low «structure is brought about. 60 -shaped elements 10 and exerts a wedge effect on the
The total structure of the swing system can thus be main
latter, so that the latter connect by friction the outer
tained at a low height. Due to the low structure the de
face of the gui-ding cylinder 6 and the inner face of
vice is particularly manageable and can be applied par
the sleeve member 11 and, thereby providing connection
ticularly also for compressing material in dikes or the
of the tool 5 with the guiding cylinder 6.
movement of the piston rod a greater stroke than the
like.
Referring now to FIGS. 3 and 4 of the drawings, dis
Another advantage of the structure of the present in 65 closing a second embodiment of the present invention,
vention resides in the possibility of providing an appreci
ably larger stroke of the tool. By this arrangement a
better compression of the material to be compressed is
secured. Furthermore, it has been made possible, by 70
the arrangement in accordance with the present inven
tion, to increase appreciably the diameter of the tool,
it is quite apparent that the device is substantially iden
tical with the ñrst described embodiment with the excep
tion of the means of connecting the guiding cylinder
with the sleeve member.
As clearly shown in FIG. 3, the bottom member 6”“
of the guiding cylinder 6 is downwardly tapered and the
3,090,286
sleeve member "11’ has a complementary inner tape, so
that the sleeve member is mounted on the bottom member
‘6"3 by means of a press seat.
4
axially in the latter, a tool connected to and movable with
.said guiding cylinder, a piston reciprocating in said guid
ing cylinder and having a piston rod, the free end of said
piston rod being pivotally connected with the free end of
said connecting rod, and a spring disposed on each side
of said piston and each of said springs engaging one face
of said piston and the corresponding opposite inner end
face of said guiding cylinder, so that said second guiding
faces 112 to the bottom face 1&14 of the sleeve member
cylinder reciprocates jointly with said tool in axial move
11' and receiving screw bolts '14 which project from the
tool 5 through and beyond the bores 113, to receive nuts 10 ments by following the forced reciprocating movement of
said piston by the intermediary of said springs, the strokes
1S, which secure thus the tool 5 to the sleeve member 151’.
FIGS. 4 and 5 disclose quite clearly the connection of
the sleeve member ‘11' with the tool 5. The edge portions
of the sleeve member 1«1'-are equipped with inclined en
gagement Afaces l112 and with bores '113 leading from the
The same securing means between the sleeve member
11 and the tool 5 are also applied to the embodiment dis
closed in FIGS. 1 and 2.
Sealing members l13 are disposed between the inner
guiding cylinder 6 and the outer cylinder 4 »forming the
housing for the working device, which sealing members
13 function as dirt-deterring means.
While I have disclosed several embodiments of the pres
ent invention, it is to be understood that these embodi
ments are given by example only and not in a limiting
sense, the scope of the present invention being determined
by the objects and the claims.
I claim:
1. A swing system for a motor-driven manually-guided 25
working device including a reciprocating tool, compris
ing a driving motor operatively connected with said Work
ing device, said driving motor having a shaft, the latter
carrying a pinion, a gear meshingiwith said pinion, a crank
drive operated by said gear and including a connecting 30
rod, said crank drive transmitting the driving force to
said swing system, a first, outer cylinder »forming a. hous
ing for said Working device, a second, guiding cylinder
coaxially disposed in said lirst cylinder and movable
of said guiding cylinder being of greater axial length than
those of said piston.
2. The swing system, as set lforth in claim l, wherein
said ûrst, outer cylinder and said second, inner guiding
cylinder deñne an annular space therebetween, and pack
ing means disposed in said annular space at the lower
end thereof, in order to provide a sealing between said
cylinders, said packing means to operate as dirt-deterring
means.
References Cited in the fiile of this patent
UNITED STATES PATENTS
769,943
2,318,315
2,845,050
2,942,589
2,944,523
Embleton ____________ __ Sept. 13,
Johnston ______________ __ May 4,
Wacker et al ___________ __ July 29,
Wacker ______________ __ June 28,
Werstein _____________ __ July 12,
1904
1943
1958
1960
1960
FOREIGN PATENTS
358,793
166,995
877,278
Germany ____________ __ Sept. 16, 1922
Austria ______________ __ Oct. 25, 1950
Germany ____________ __ May 21, 1953
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