JPH0574721B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention includes a casing, a driven shaft rotatably supported within the casing, and a swing piston coupled to the shaft in a relatively non-rotatable manner. A hydraulic or pneumatic swiveling piston motor having a swiveling piston configured as a lever with two arms each having a different pressure surface, the swiveling piston being configured as a lever with two arms each having a different pressure surface, the arms being In the casing, two working chambers which can be loaded by a pressure medium are divided and bounded by the arms of a swiveling piston that moves in a sealed manner, and the swiveling piston is actuated by a pressure medium and is capable of reciprocating swivel over the maximum rotation angle defined by the stopper device, and the casing surrounds the shaft in the circumferential direction and has no joints in the working range of the swivel piston. The present invention relates to a type consisting of a shell and a cover that closes the shell.

BACKGROUND OF THE INVENTION A swiveling piston motor of this type is described in DE 2309959 A1.

The maximum rotation angle of the pivot piston in this case is approximately 90°, and obtaining a rotation angle greater than that is not possible due to the construction, as beyond the 90° mark, the sealing function is significantly reduced or rendered ineffective. It is impossible for the following reasons.

The casing of this known swivel piston motor has an enclosure which essentially has the contour of two circular sectors, in which case the end face of one of the lever arms is movable along the arcuate surface of the first sector. while the second sector is assigned a smaller second lever arm, and the end face of this second lever arm is also sealed to the second sector in close contact with the second sector. It can slide along an arcuate surface.

These two circular sectors each have an opening angle of approximately 90°, which defines the maximum rotation angle.

In order to limit deviations in the rotation angle, a non-adjustable stop is integrally molded on one of the lever arms, so that the variable rotation angle range cannot be adjusted arbitrarily in advance.

(Problems to be Solved by the Invention) Therefore, the object of the present invention is to improve the conventional type of swiveling piston motor so as to achieve a swiveling motion of significantly more than 90° with a simple structure, advantageously a small amount. The object of the present invention is to enable a 180° turning movement in both directions, and to ensure that the turning range between the two turning end positions of the turning piston can be continuously adjusted.

(Means for Solving the Problems) According to the present invention, in order to solve the above problems, the first lever arm surrounds the driven shaft.
It is structured as a hollow cylindrical bush of seeds,
The jacket surface of the bushing is surrounded, at least in part, along its outer periphery by a coaxially disposed jacket seal, the jacket seals being evenly distributed along its periphery. The second lever arm has a ribbed sealing lip which is designed to cooperate exclusively with a counter surface which is fixedly arranged on the casing, whereas the second lever arm has a ribbed sealing lip. The lever arm has a larger radial extension than the lever arm of No. 1 and is completely sealed by a circumferentially extending sealing member, and the maximum rotation angle of the pivot piston is set to at least 180°. , this value can be fixed or adjusted by means of an adjustable adjustment device, such that the raceway surface in the casing on which the two lever arms of the swiveling piston rest is as follows:
That is, one lever arm is arranged relative to one another in such a way that it can only leave the corresponding track surface once the other lever arm has reached its maximum tilted position.

(Operations and Effects of the Invention) The advantage of the swiveling piston motor according to the present invention is that the swiveling range of the swiveling piston is significantly expanded, and a swiveling movement of at least 180° or more is made possible. .

The swiveling piston motor according to the invention has a simple construction, in particular there is no need for a special shape of the sealing surface cooperating with the jacket seal.
Rather, this sealing surface need only be provided as a flat surface on the housing part or on the cover or shell.

The formation of this sealing surface is easily achieved, for example using conventional grinding tools, thus ensuring a low-cost manufacture of the swivel piston motor. One of the lever arms is, as it were, "degenerated" into a bushing surrounding the shaft, so that a very small first lever arm is formed without a projection.

Moreover, the smaller this first lever arm is, the closer the drive shaft can be to the wall delimiting the casing, for example the cover, and at the same time the dimensions of the counter surface provided in the stationary part are reduced. Reduced.

Another advantage of the swiveling piston motor according to the invention is that, despite the large swiveling range of the swiveling piston, only a sealing mating occurs between the casing material and the sealing material;
A single seal mating allows for a better design from a wear standpoint without having to make any compromises.

The design of the swiveling piston motor according to the invention allows a simple manufacture of the sealing surface.
In this case, the housing cover, which has an approximately rectangular external contour, need only be surface-ground to obtain the sealing surface, for example at an easily accessible point. When the cover is made flat in this manner, it becomes easy to hold it in place during processing.

In addition, a swivel movement of the swiveling piston over at least 180° is possible, and the sealing function between the bush forming the first lever arm and the casing is not compromised thereby. The symmetrical construction of the swiveling piston motor and thus its manufacture are simplified.

The arrangement of the invention ensures a reliable abutment of the jacket seal on the bushing, and at the same time provides a satisfactory sealing function in each position of the pivoting piston.

According to the configuration of the present invention, the inside of the casing of the swing piston motor can be reliably cleaned by simple means.
Moreover, it is partitioned into two working chambers with good sealing.

According to the present invention, a sealing member for sealing a swinging piston can be manufactured easily and at low cost, and at the same time, it becomes possible to quickly attach this sealing member to the swinging piston. Additionally, the one-piece design in this case eliminates the need for additional equipment to deal with leakage of the working medium, and the seamless construction of the single seal member ensures a reliable seal at each corresponding seal point. Guarantee.

According to the invention, the sealing effect between the first lever arm, which is designed as a bushing, and a sealing surface provided thereon, for example on a housing cover, is optimal.

In this case, a precise sealing effect is obtained at the point of contact between the sealing lip and the stationary sealing surface, so that a reliable seal that does not deteriorate even under high operating pressures is guaranteed.

According to the invention, the housing material itself is designed directly as a sealing surface, so that there is no need to provide special sealing elements that cooperate with the jacket seal. The number of wear points is thus significantly reduced and the manufacturing costs of the swiveling piston motor according to the invention are also kept to a minimum.

The adjustment device provided in order to be able to take full advantage of the large rotation angle range of the swivel piston motor according to the invention acts between the rotatable and the stationary parts of the swivel piston motor. Advantageously, the adjusting device has an adjusting disk which is fixedly connected to the shaft, and which follows the pivoting movement of the pivoting piston.

By adjusting the position of the stopper body, the advantage arises that the range of rotation of the swivel piston can be adjusted steplessly. This adjustment takes place outside the swiveling piston casing and can take place in any position occupied by the swiveling piston.

According to the invention, it is also possible to limit the angle of rotation within the swivel interval given by the two end positions of the swivel piston. This arrangement is particularly advantageous when the driven shaft must occupy a predefined position from the outside.

According to the invention, an unintentional displacement of the stop body relative to the adjustment disk is prevented. Therefore, the position of the stopper body is ensured, especially even if the stopper body is impactfully struck against a corresponding stopper fixed to the casing. In this case, in addition to the loose clamping force that firmly tightens the stop body on the adjustment disk, there is additionally a friction factor that ensures the position of the stop body or bodies under any load. act.

According to the configuration according to the invention, a friction lining that guarantees a reliable "braking action" between the two cooperating parts can be produced at low cost.

According to the invention, there is no relative displacement between the adjusting disc and the stopper body, and the holding force is approximately doubled compared to a simple friction lining design.

Since the driven shaft can be positioned very close to the inner surface of the casing cover, only a very small sealing surface is required on the cover. In addition, according to this configuration, there is no need to provide a sealing surface with a special shape, for example, an arcuate shape, so an extremely large piston rotation covering at least 180° can be achieved with a simple configuration of a fixed sealing surface. A range is achieved.

(Example) Next, the configuration and function of the swing piston motor according to the present invention will be described in detail with reference to the example shown in the accompanying drawings.

FIG. 2 shows a broken section of the basic structure of the swiveling piston motor according to the invention as a plan view.

This swing piston motor includes a casing 1 and a shaft 2 rotatably supported within the casing 1.
It has This shaft 2 is given a reciprocating pivoting movement by means of a pneumatic or hydraulic pressure medium, the angle of rotation of the shaft 2 being predetermined within predetermined limits between the two end positions. I can do it.

This swing piston motor is driven by shaft 2.
a pivoting piston 3 that is relatively unrotatably connected to the pivot piston 3;
It is done through.

The interior of the casing 1 is divided by a pivoting piston 3 into two working chambers 4, 5, into each of which a connection 6 for a pressure medium opens.

If, by means of a control circuit not shown, the working chamber 4 is pressurized on one side of the swiveling piston 3 and at the same time the other working chamber 5 is depressurized, the swivel axis defined by the shaft 2 The pivoting piston 3 rotates around the center.

Since the pivoting piston 3 and the shaft 2 are connected to each other in a rotationally fixed manner, this pivoting movement is transmitted to the shaft 2, which is entrained by the pivoting piston 3.

In order to reverse the pivoting movement of the piston, the supply of pressure medium is reversely controlled so that the working chambers 4, 5
The loading and unloading of the pressure medium at is also reversed and the shaft 2 is rotated in the opposite direction.

The shaft 2 is guided so as to protrude outside the casing 1 (see also FIG. 1). Therefore, it can be connected to any working machine that is rotated by motor driving force.

The rotation angle of the swing piston 3 or shaft 2 is
Due to construction limitations, the embodiment of the pivoting piston motor shown in FIG. 2 allows a maximum rotation angle of just over 180 degrees.

A limit stop 7 is provided to limit the rotation angle. This limit stopper 7
are formed integrally with the housing 1 or fixedly connected to the housing 1; in the embodiment according to FIG.

These limit stops 7 are located within the movement path of the pivoting piston 3. In its end position, the swivel piston 3 thus rests on a respective limit stop 7, thereby defining the swivel piston position which limits the maximum angle of rotation.

In addition to these limit stops 7, the invention also provides at least one stationary stop, not shown in FIG. The angle can also be adjusted steplessly.

According to FIG. 2, the swivel piston 3 has a bush 49 which is fitted onto the shaft 2 in a relatively rotationally fixed manner and which is connected to the first short lever of the swivel piston 3. It forms an arm. This shaft 2 therefore forms a bearing for the pivoting piston 3.

The pivot piston 3 also has a second lever arm. This lever arm is used as a rotor blade or vane 8 and has a much greater length than the first lever arm.

The vane 8 projects approximately at right angles to the rotational or longitudinal axis 10 of the shaft 2 and forms the majority of the effective piston surface in the pivoting piston motor.

This embodiment was adopted because the piston surface of one lever arm was made significantly larger, and the piston surface of the other lever arm was This is because it is desired to keep it extremely small.

The embodiment of the pivot piston shown in FIG. 2 can therefore be considered to be operated by a substantially one-armed lever. However, the final thickness of the shaft 2 and the bushing 49, determined for stability and strength reasons, even if small, creates a pressure acting surface that opposes the driving force, so that the bushing 49 works more effectively than the lever arm.

This bushing 49 assumes the important role of perfecting the seal between the two working chambers 4 and 5. Therefore, when the swing piston 3 rotates, the vane 8 moves in close contact with the cylindrical jacket surface 11, and the bush 49 moves in close contact with the flat corresponding surface 9 of the casing 1. .

This jacket surface 11 is located coaxially with respect to the axis of rotation 10 of the shaft 2, and the distance from the cylindrical jacket surface 11 to the axis of rotation 10 is much greater than the distance from the corresponding surface 9 to the axis of rotation 10. big.

The relative arrangement of the jacket surface 11 and the corresponding sealing surface 9 is such that the plane limited by the jacket surface 11 and the plane limited by the corresponding sealing surface 9 form a cylinder with a portion cut away when viewed in cross section. The cross section of the portion removed from this cylinder is determined to have the shape of a circular section.

The importance of this corresponding sealing surface 9, which is integrally formed with the housing 1 and also preferably with the housing cover 22, is limited to the area of contact of the bushing 49; for example, this corresponding surface 9 can be designed as a projecting surface. is also possible.

The angle of extension of the jacket surface 11 is approximately equal to the maximum angle of rotation of the pivoting piston 3, ie at least 180 DEG in the embodiment of FIG.

The pivoting piston 3 is sealed to the casing 1 via an integral sealing member 51, which will be explained in detail later.

In FIG. 1, a swiveling piston motor according to the invention is depicted in perspective. This figure shows an advantageous embodiment of the external shape of the swiveling piston motor according to FIG.

Casing 1 mainly shown in this figure
It is composed of a shell 21 and a cover 22 that closes the shell 21 and has a basic structure in the shape of a substantially rectangular parallelepiped. The shell 21 has an approximately semi-cylindrical section 23 whose cylindrical axis coincides with the rotational or longitudinal axis 10 of the shaft 2 .

The shaft 2 passes through this shell 21 and protrudes from both sides thereof. The support for shaft 2 is
For example, this is done by a ball bearing or a bearing bush provided at the point where the shaft 2 passes through the shell 21.

A free end 25 of the shaft 2 that projects beyond the shell 21 is used for connecting to a working machine or the like (not shown). In addition to the semi-cylindrical part 23, the shell 21 has two cover parts 27 located opposite each other. These cover parts 27 are connected to the semi-cylindrical part 23 towards the cover 22 and are integrally molded onto the semi-cylindrical part 23 at their flat transition.

Therefore, this shell 21 has a substantially truncated oval shape when viewed in plan. Semi-cylindrical part 23
is primarily defined by the jacket 28, whose inner surface facing into the casing is a second
It forms the jacket surface 11 shown in the figure.

The flat rear side of the shell opposite the semi-cylindrical part 23 or the jacket 28 is open, so that the pivoting piston 3 can be installed into the casing 1 from this side. After the pivot piston 3 has been installed, this opening is closed by a cover 22.

Cover 22 having an approximately rectangular parallelepiped basic structure
is rounded on its two free longitudinal sides 48 and is provided with mounting holes 29 for guiding coupling members, not shown, which are used to screw the cover 22 with the shell 21.

In this case, suitable projections or eyes (not shown), each having a thread, are preferably integrally molded or fixedly connected to the jacket 28 of the shell 21, into which the connecting member is screwed.

The connection designated by 6 is aligned with the conduit leading to the connection opening for connecting the pressure medium.

At the free end (not shown) of the shaft 2 opposite to the free end 25, a stop or adjustment device 26 is provided for making it possible to adjust the angle of rotation of the swiveling piston 3. Regarding this device,
A detailed description will be given later in connection with other drawings.

Next, with reference to FIGS. 2 and 4, the sealing member 51 provided on the pivot piston 3 for sealing the two working chambers 4, 5 will be explained in detail.

This integrally constructed seal member 51 includes a jacket seal 64 that coaxially partially surrounds the bush 49, a vane seal 65 that surrounds the vane 8 on its end surface 15 side, and a jacket seal 64.
and a bushing seal portion 68 disposed between the bushing 48 and the vane seal 65 to seal the bushing 48 on end faces 66 and 67, respectively. This bushing seal portion 68 is connected to the end face 6 of the bushing 49.
It stands out slightly from 6 and 67.

The vane seal 65 is a kind of strip 6 that is coupled into the end groove 70 formed in the end face 15 of the vane 8.
It is configured as 9. This seal belt 69
project slightly from the end face 15 and are each provided with a consistent sealing lip 16 at both sealing edges assigned to the vane sides 71, 72, as shown in FIG. These sealing lips 16 therefore extend in the longitudinal direction of the sealing belt 69.

The vane sides 71 and 72 are not sealed,
Only the jacket surface 73 of the cylindrical bush 49 is surrounded by the sealing member of the jacket seal 64. This jacket seal 64 is
It surrounds the bush 49 on the opposite side from the vane 8. In this case, the angle of extension of the jacket seal 64 surrounding the bushing 49 is at least 180°.

The jacket seal 64 and the bush 49 are arranged substantially coaxially.

In the jacket seal end region 74 of the bush 49 facing the end faces 66, 67, a bush seal part 68 is arranged in each case, which connects the vane seal 65 and the jacket seal 64 to one another.

In order to hold the bushing seal portion 68 or the end region 74 of the jacket seal 64 on the bushing 49, the end faces 66, 67 of the bushing 49 are provided with:
A circumferential groove (not shown) is bored. A jacket seal 6 is provided in these circumferential grooves, which are provided approximately concentrically with respect to the rotation axis or longitudinal axis 10.
4 or the button seal portion 68 can be combined.

All the sealing devices described above are of integral construction and can be mounted or connected in a simple manner on the swivel piston of the swiveling piston motor according to the invention.

Along the circumferential surface of the jacket seal 64,
It has a sealing lip 75 extending parallel to the axis of rotation 10, that is, the longitudinal direction of the bush. These seal lips 75 are connected to the jacket seal 64.
The bushing 49 projects outward from the bushing 49 when viewed in the radial direction of the rotating shaft.

The jacket seal 64 and the seal lip 75 are constructed in a relative relationship such that the jacket seal 64 serves as a base block supporting the seal lip 75 and partially surrounds the bush 49.

However, it is also possible to adopt a different construction mode, for example without sealing material between the individual sealing lips 75, viewed in the circumferential direction of the bushing 49, but on the end faces 66, 67 of the bushing 49. Only the facing ends 76, 77 have this sealing lip 7.
5 can also be combined with a ring-shaped bush seal portion 68.

In this case, in order to securely hold each seal lip 75, the number of vertical grooves that extend in the longitudinal direction of the bush 49 and parallel to the axis of rotation or the longitudinal axis 10 of the shaft 2 must be formed in the bush in a number corresponding to the number of seal lips 75. 49, and seal lips 75 may be inserted into these vertical grooves.

Each seal lip 75 projects substantially radially from the bush 49 and is wedge-shaped and tapered in the direction away from the bush 49.

According to this configuration, the seal lip 7
5 is provided with a sharp sealing edge 78 which provides an excellent sealing function.

Note that it is of course possible to configure the jacket seal 64 without the protruding seal lip 75. In that case, the sealing function is achieved only by bringing the jacket seal 64 into abutment with the cooperating counter surface 9.

The inner width of the shell 21, that is, the distance between the two cover parts 27 inside the casing, is matched to the height of the vane 8 on the pivot piston 3 or the length of the bush 49, so that the vane seal 51 and the bush seal part 68 are It is designed to fit closely against the inner wall of the portion 27 or the jacket surface 11.

At the same time, the jacket seal 64 or at least one sealing lip 75 rests on a corresponding sealing surface 9, which is designed simply flat, on the inner surface 79 of the cover facing the working chambers 4, 5 inside the housing.

The length of the first lever arm (i.e. the bush 49), measured as the distance between the rotational or longitudinal axis 10 of the shaft 2 and the outer surface of the jacket seal 64 or seal lip 75, is very small. Therefore, it is possible to keep the dimensions of the counter surface 9 relatively small, which in turn makes it possible to reduce the manufacturing costs of the swiveling piston motor according to the invention.

The height of the casing 1, which depends primarily on the height of the pivoting piston 3, can be varied depending on the desired piston area.

In this case, in order to obtain a high driving torque, it is effective to construct the casing 1 in a flat shape so that the height of the casing 1 is smaller than the radial dimension of the swing piston 3.

The shell 21 or cover 22 is advantageously manufactured in one piece by non-machining methods, for example from plastic or die-cast zinc. Next, the shell 21 and the cover 22 can be demolded along the dividing plane 20 that divides them.

Therefore, no burrs are formed on the running surface of the swing piston 3, and there is no need for secondary processing.

FIG. 3 shows a cross section of the swing piston motor taken along the line - in FIG. 1. In this figure, the free end 25 of the shaft 2 projects downwards and has an axially extending and radially projecting driver 30, for example a dowel key, so that
This shaft 2 can be easily connected in form-fitting manner to a working machine.

The shaft 2 is supported within the shell 21 via a bearing 24, for example a ball bearing. A bearing projection 17 projecting from the cover part 27 of the shell 21 in the longitudinal direction of the shaft 2 is integrally molded into the shell 21 for receiving a respective bearing 24 . These bearing projections 17 preferably project outwardly from the shell 21.

There is no need to provide a special seal member at the location where the shaft 2 passes through the shell 21. Sealing of this part takes place via a bush sealing part 68 in the sealing member surrounding the pivoting piston 3.

However, it is of course also possible to provide this part with a sealing ring, for example a conventional seal or a doctor ring.

If the bearing 24 is configured as a guide sleeve such as a sliding bearing (not shown), the bearing 24 can have a relatively simple shape.

The depth at which the shaft 2 is inserted into the casing 1 is
A flange 32 that projects radially from the shaft 2
This flange 32 is limited by
It abuts on one side of the bearing 24 on the end face side.

The shaft 2 is permanently mounted in the housing 1 on the side opposite the free end 25 by means of an adjustment or stop device 26 .

An outer wall engaging portion 34 extending in the axial direction is provided in a portion of the shaft 2 when viewed in the longitudinal direction. This outer wall engagement 34, which is configured, for example, as a notch engagement, is shown in FIG. 3 as an unbroken plane.

In this embodiment, a spline shaft type joint with linearly extending sides is used, which is advantageous in terms of production costs. In this case, the outer wall engagement 34 is used to connect the shaft 2 and the pivot piston 3 as well as the adjusting disc 35 of the adjusting device 26 in a relatively rotationally fixed manner.

In order to achieve this relatively non-rotatable connection, the hollow cylindrical bush 49 of the swiveling piston 3 is provided on its inner surface with a corresponding engagement part 31 which is designed to be complementary to the outer wall engagement part 34. . This is particularly easy to see from FIG.

The shaft 2 projects from the bearing 24 by a toothed section 19 provided at its end 18 opposite the free end 25 . On this section 19, an adjustment disk 35 is mounted in form-fitting manner, which has a central bore 13 provided with a mating part that matches the corresponding part 31 of the bushing 49.

The longitudinal axis of this perforated portion 13 is defined by the adjustment disk 35
The adjustment disc 35
is coaxially fitted onto the shaft 2. The adjustment disc 35 is locked onto the shank of the shaft 2 via a retaining ring 36 to ensure its position. The adjustment disc 35 is constructed in the shape of a sleeve in the area of the perforation 13, and when the adjustment disc 35 is installed, one end surface of the sleeve 14 is connected to the bearing 24, and the other end surface is connected to the bearing 24. Each abuts on a retaining ring 36.

Also, in Figure 3, shell 21 and this shell 21 are shown.
A two-piece casing 1 is shown, consisting of a cover 22 which closes the casing 1, and a cross-section of the pivoting piston 3 already mentioned in connection with FIGS. 2 and 4 is shown.

As is clear from this figure, both the bush 49 and the vane 8 of the pivot piston 3 are constructed integrally with each other. The swing piston 3 performs a swing movement within the shell 21 and is sealed against the shell 21 and the cover 22 by a sealing member 51.

Reference numeral 64 indicates a cross section of the jacket seal, and this jacket seal 64 is attached to the cover 2.
Collaborate with the corresponding aspect 9.

In the area of the end faces 66, 67 of the bushing 49, the cross section of a ring-shaped step 80 formed in the pivoting piston 3 is clearly visible. In this ring-shaped step 80 a section of the sealing member 51 can be engaged in order to hold the pivoting piston 3 .

The sealing element 51 can be injection molded on the pivoting piston 3, in particular made of plastic.
A seal member 52 is provided on the inner surface 79 of the cover 22 on the side facing the shell 21, and is inserted into a groove 81 cut in the inner surface 79 of the cover 22. This groove 81 is preferably designed as a closed surface channel in which a ring-shaped groove 81 is provided.

The contour of this sealing passage is matched to the contour of the edge at the open end of the shell 21, so that the edge 54 of the shell 21 can be inserted into this groove 81 with the sealing member 52 interposed. be. The depth to which the shell 21 is inserted into the groove 81 is limited by a step 55 provided at the outer edge of the end face of the shell. With this, Ciel 21 becomes cover 2.
2 and are brought into close contact. Groove 81 has an elliptical shape that matches the shape of edge 54 .

FIG. 3 shows the structure of the shell 21, which consists of a generally semi-cylindrical section 23 and a cover section 27 molded thereon. This Ciel 21
is constructed integrally with the entire seal and working area of the swivel piston 3, especially the swivel piston vane 5.
No casing seal is formed within the range of motion. This shell 21 can be manufactured from plastic or die-cast metal without burrs or impact. In that case, demolding is performed on the side of the opening closed by the cover 22.

Such a manufacturing method has the advantage that it is carried out particularly cost-effectively and that no secondary machining is required in the sealing area of the swiveling piston 3. cover 2
2 is of substantially flat design and opens into each working chamber 4, 5 separated by a connection not shown in FIG. It has a connecting part.

As can be seen from FIG. 3, the adjusting or stopping device 26 is provided at the free end 18 of the shaft 2 and is fixed in a form-fitting manner to the meshing section 19 of the shaft 2 by means of the already mentioned toothed members. It has an adjustment disk 35 that controls the adjustment.

This adjustment disc 35 is of substantially circular construction and has at least one stopper body 37, which is arranged on the adjustment disc 35 so that its angle can be adjusted.

According to FIG. 5, which shows the adjusting disk 35 alone with two stop bodies 37, the stop bodies 37 have a particularly round cake-like shape. In other words, this stopper main body 37 is limited by the cylindrical outer peripheral surface on the side facing the shaft 2 and the opposite side, and on the side side,
limited by a radial plane.

In order to limit the rotation angle of the pivoting movement in the pivoting piston 3, one or more stopper bodies 37 are provided.
is equipped with a corresponding stopper 38 fixed to the casing.
is provided.

As is clear from FIG. 3, this corresponding stopper 38 is integrally molded with the cover 22 and has the same cake-piece shape as the stopper body 37.

In principle, it is sufficient to use a single stopper body 37 to adjust the rotation angle of the swivel piston motor according to the invention, but it is advantageous to provide two stopper bodies 37 that limit the rotation angle on both sides. , is more effective. In that case, both stopper bodies 37 abut against mutually facing surfaces of the corresponding stopper 38 .

As is particularly clear from FIG. 5, the adjustment disc 35 is provided with an arc-shaped elongated hole 39 that extends concentrically with respect to the axis of rotation 10 of the shaft 2. One elongated hole 39 is provided for each stopper body 37.

As can be easily seen from FIG. 3, the stopper body 37 consists of two relatively adjustable jaws 40 which, when attached to the adjustment disc 35, abut against both sides of the disc. come into contact with

The axial dimension of the sleeve 14 on the adjustment disk 35 is set to an appropriate value, and this is set to a suitable value.
or by cooperating with the bearing projection 17, sufficient force is required to effect a rotational movement about the axis of rotation 10 on the clamping jaw 40 mounted on the underside 41 of the adjusting disk 35 on the side facing the swivel piston 3. You will be given free space.

This free space for rotational movement is limited only in the area of the corresponding stop 38.

This is because the corresponding stop 38 protrudes very close to the lower surface 41 of the adjustment disc 35.

The tightening jaws 40 of the stopper body 37 that abut against the lower surface 41 of the adjustment disc 35 are each provided with a screw hole. This threaded hole is aligned with an associated elongated hole 39 formed in the adjustment disc 35, into which a screw 43 can be inserted on the upper side 41 of the adjustment disc 35 opposite to the lower side 41.
It can be screwed together from the side.

In this case, the second tightening jaw 40 on the stopper body 37 is attached to the upper surface 42 of the adjustment disc 35.
and the screw head of the screw 43,
Since it forms a counter-receiving device, the two clamping jaws 40 are tightened against the adjusting disc 35 when the screw 42 is tightened.

If this screw connection is slightly loosened, the stopper body 37 can be continuously adjusted along each elongated hole 39, thereby achieving stepless adjustment of the rotation angle of the swing piston motor.

On one disk surface of the adjustment disk 35, at least within the adjustment range of the stopper body 37,
A friction lining 56 is formed.

In the embodiment shown in FIGS. 3 and 5, the disc surface 5 located on the lower surface 41 of the adjustment disc 35
9 is completely covered by a friction lining 56. Due to this fact, when the stopper body 37 is clamped onto the adjusting disc 35, the clamping surface 58 of the clamping jaw 40 facing the disc surface 59 is firmly pressed onto the friction lining 56.

Due to the cooperation between the friction lining 56 and the tightening surface 58 of the stopper body 37, the stopper body 37
The position of the stopper main body when the stopper comes into contact with the corresponding stopper 38 is additionally secured. This friction lining 56 prevents the stopper body 37 from slipping, so that the holding force of the stopper body 37 is significantly increased.

In order to further increase this holding effect, it is advantageous if the disk surface 59 located on the upper surface 42 of the adjusting disk 35 is also provided with a friction lining according to the invention.

Another advantage obtained by using the friction lining in this way is that the stopper body 37
In order to unintentionally shift the stopper body 37, the stopper body 37 must overcome not only the clamping force transmitted by the clamping screw 43, but also the friction surface and the clamping surface that act complementary to each other. It is mentioned that additional forces arising from friction factors must also be overcome.

The friction lining 56 can be constructed integrally with the adjusting disc 35 or can be formed separately and fixedly connected thereto.

The friction lining 56 can be constructed, for example, with a sandpaper-like grained surface or of a brake lining-like material. It is also possible to form this friction lining on the adjustment disk within the scope of a cold working process or to form the friction layer within the scope of an injection molding process, for example by metal injection molding.

The stopper body 3 is designed to have a rounded shape in order to protect the adjusting device and to give an aesthetic appearance to the swivel piston motor according to the invention.
The adjustment disk 35 having a number 7 is covered by a hood 44 which can be placed over it and rotated together.

This measure therefore prevents foreign objects from entering the adjusting device and from blocking the interlocking track of the stopper body 37.

Even when the hood 44 is placed over the adjustment disc 35, there is a stopper body 37 between the upper surface 42 of the adjustment disc 35 and the inner surface of the hood cover 60.
Sufficient free space remains for accommodating the upper tightening jaw 40 at. The inner surface of the hood cover 60 is provided with a ring-shaped protrusion 45 extending in the axial direction. The insertion depth of the hood 44 is limited by the free edge of this axial projection 45 resting against the adjustment disc 35 .

The inner diameter of the hood 44 and the outer diameter of the adjustment disc 35 are aligned with each other in such a way that the hood 44 can be placed over the adjustment disc 35 and at the same time a clamping connection is created between these two parts. .

Therefore, one of the screws that securely holds the hood 44 can be omitted; however, for example, if the hood 44
Of course, it is also possible to screw-fix the hood 44 by screwing one screw holding the shaft 2 into a cap screw hole formed in the end surface of the free end 18 of the shaft 2.

In order to fix the hood 44 relative to the adjustment disk 35 so that it cannot rotate relative to it, teeth or the like (not shown) are integrally formed on the inner circumferential surface of the hood 44 . These teeth form a corresponding notch 61 provided on the outer circumferential surface of the adjustment disc 35.
It is inserted in a form-locking manner.

Further, a perforation 47 is formed on the upper surface of the hood 44 so that a tool for adjusting the stopper body 37 can be engaged therewith.

These perforations 47 are, for example, the adjustment disc 3
It is possible to match the course line of the elongated hole 39 provided in 5. Therefore, in that case, the perforated part 47 is arranged in an arc shape with the rotational axis of the hood 44 as the center, but it is of course possible to configure the perforated part 47 so as to have other shapes. be. Since such a perforation 47 is formed in the hood 44, depending on the configuration of the adjustment screw 43, the adjustment screw 43 can be removed using a screwdriver or a wrench.
It is now possible to loosen the screw, adjust the stopper body 37 on the adjustment disc 35 and tighten the screw again.

The adjusting device is also provided with a display device 46 for displaying the position of the pivot piston 3.

This display device 46 is connected to the adjustment disk 35 in a relatively rotationally fixed manner and can be mounted, in particular, on the outer wall of the hood 44.

FIG. 6 shows the side view of the swiveling piston motor against which the hood 44 with this display device 46 rests. The display device 46 is mounted on the hood outer wall 62
A scale 50 is provided on the outer peripheral surface 53 of.
This scale 50 has a large number of scale lines and is arranged concentrically with respect to the rotation axis 10.

This display device 46 has a pointer-like display member 63 fixedly provided on the casing 1,
This pointer as display element 63 cooperates with scale 50 .

In this way, the position occupied by the swivel piston 3 can be easily read at any time during operation, and as long as the scale 50 is read, the piston position becomes clear, so that the adjustment of the swivel or rotation angle of the swivel piston 3 can also be carried out. It becomes significantly easier.

The swiveling piston motor according to the invention has a very compact construction and consists of only a small number of individual components.

Its assembly is also extremely easy. For assembly, first only the swiveling piston 3 is introduced into the shell 21, then the shaft 2 is inserted into the toothed bush 49, then the adjusting device 26 is installed and finally the shell 21 is inserted. cover 22
Close with.

As embodiments with different features, constructions without the adjustment device 26 are also conceivable. In addition, a signal generator for pneumatic or hydraulic control is provided.
It is also possible to construct a swiveling piston motor that is installed in a simple and advantageous manner.

If the swing range of the swing piston can be adjusted steplessly,
The swiveling piston motor according to the invention can be used in a wide variety of applications as a pneumatic or hydraulic rotary drive.

It is advantageous to set the maximum adjustable rotation angle to a value of at least 180° or more. This swing piston motor can be used for example on doors,
It can be used for windows, flaps like silo flaps, mounting hardware, etc.

In such an application, the swiveling piston motor according to the invention can carry out many operating movements, such as opening and closing a valve or adjusting a point in a conveying installation.

Further examples of uses for the pivot piston motor according to the invention include robot arms, manipulators, transfer or rotation stations, etc.

It is possible to drive a switching turntable with limited rotation angle by using only one pivot piston motor according to the present invention. It is also possible to construct a drive that rotates at low speeds by effectively utilizing a plurality of swiveling piston motors operating intermittently and acting on the same shaft via a freewheel clutch.

A swivel piston motor completely surrounds this 1
By sealing the abutment surface with two seal members, it is possible to manufacture a swing piston motor that is particularly low in cost and has a high sealing effect.

Therefore, in this case, the rotating piston motor is
One "raw material" can then be constructed around which the sealing material can be injection molded.

It is advantageous to use an elastomer as the sealing material, the entire surface of the pivoting piston 3 being covered with this elastomeric material.

Thus, by completely surrounding the swivel piston 3 with an integral sealing member, it is avoided that the sealing member disengages from the swiveling piston in an unpredictable manner, and prevents the sealing member from disengaging from the pivoting piston in an unpredictable manner. No seams or transition points are formed.

The counter surface 9 cooperating with the jacket seal 64 of the pivoting piston 3 is preferably constructed flat, but
In particular if the radial dimensions or the thickness of the bushing 49 as the first lever arm are large, it is also possible to provide the corresponding surface 9 with a curved contour.

It is also possible for this counterface 9 to be molded directly into a part of the casing 1, for example the casing cover 22, or for an additional sealing element to be attached to the casing 1 to co-operate with the jacket seal 22.

Both lever arms of the swing piston 3 (button 4)
9 and vane 8) are in contact with the movement trajectory (jacket surface 1) in the casing 1 during the piston rotational movement.
1 and corresponding surface 9) are arranged relative to each other in such a way that one lever arm can leave the track only when the other lever arm has reached its maximum tilted position. .

Only with this arrangement can a pivoting movement of at least 180° of the pivoting piston 3 be achieved. Therefore, a reliable seal is always maintained between the rotating piston 3 and the casing 1 surrounding it, and both working chambers 4 and 5 are always gas-tightly sealed from each other. The state can be maintained.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the external structure of a casing in a swing piston motor according to the present invention. FIG. 2 is a cross-sectional view of the swing piston motor according to the present invention taken along the - line in FIG. 1. FIG. 3 shows a longitudinal sectional view of a swiveling piston motor according to the invention with an adjustment device along the line -- in FIG. 1; FIG. 4 is a side view of the pivoting piston according to FIG. 2; FIG. 5 is a bottom view of one embodiment of the adjustment disc. 6th
The figure is a front view of a swiveling piston motor according to the invention with a hood attached. DESCRIPTION OF SYMBOLS 1...Casing, 2...Shaft, 3...Swivel pin, 4, 5...Working chamber, 6...Connection part, 7...Limit stopper, 8...Vane, 9...Sealing surface, 10...Rotation axis or vertical axis, 11...Jacket surface , 13...
Perforation part, 14... Sleeve, 15... End face, 16... Seal lip, 17... Bearing projection, 18... Free end part,
19...Toothed section, 20...Dividing plane, 21...Shell, 22...Cover, 23...Semi-cylindrical part, 24
... bearing, 25 ... free end, 26 ... stopper or adjustment device, 27 ... cover part, 28 ... jacket,
29... Attachment hole, 30... Drive body, 31... Engagement part,
32...Flange, 34...Outer wall engaging portion, 35...Adjustment disk, 36...Retaining ring, 37...Stopper body, 38...Stopper, 39...Elongated hole, 40...Tightening jaw, 41...Lower surface, 42...Upper surface of 35, 43
...Adjustment screw, 44...Hood, 45...Protrusion, 46
...Display device, 47...Drilling part, 48...Free vertical side surface,
49... Button, 50... Scale, 51, 52... Seal member, 53... Notch, 55... Step, 56... Friction lining, 57... Disk surface, 58... Tightening surface, 5
9... Disc surface, 60... Hood cover, 61... Notch, 62... Hood outer wall, 63... Display member, 64
...Jacket seal, 65...Vane seal, 6
6, 67... End face, 68... Button seal portion, 6
9... Seal belt, 70... End groove, 71, 72...
Vane side surface, 73... Jacket surface, 74... End range, 75... Seal lip, 76, 77... End portion, 7
8...Seal edge, 79...Cover inner surface, 80...Ring-shaped step, 81...Groove.

Claims (1)

[Scope of Claims] 1. A hydraulically or pneumatically operated swing piston motor, comprising (a) a swing piston 3 capable of swinging within a casing 1 over an operating range of at least 180°, and (b) The pivoting piston 3 is provided with a bush 49 which is fixed to the drive shaft 2 which is rotatably mounted on the casing 1 and which is connected to at least one of said shafts 2. (c) the pivot piston 3 further includes a vane 8 fixed to and protruding from the bush; (d) the bush 49 and the Both vanes 8 are provided with sealing parts 64, 65, respectively, which seals are in close engagement with the sealing surfaces 9, 11 on the casing 1, thereby providing a seal inside the casing 1. (e) The sealing device provided on the vane 8 is divided into two working chambers 4 and 5, each of which can be supplied with pressure fluid. (f) The seal device 64 attached to the bush 49 has a seal lip 75, and the seal device 64 is attached to the bush 49 and has a seal lip 75. 75 extends axially between the two axial end faces 66, 67 of the bushing 49, and the sealing lip 75 is capable of tightly engaging another corresponding face 9 of the casing 1. (g) The sealing device attached to the bush 49 is formed as a jacket 64, which has a hollow cylindrical shape on the jacket surface 73 of the bush 49 on the side opposite to the vane 8. (h) The jacket 64 has two parts over its circumferential surface.
The sealing lip 75 has a sealing lip 75 that is divided into three or more parts, and the sealing lip 75 projects radially outward from the jacket 64 in a rib shape, and the jacket 64 has a sealing lip 75 that is divided into two or more parts. (i) At each pivot position of the pivot piston 3, at least the rib-shaped seal lip 7 of the jacket 64
5 is in close contact with the corresponding surface 9 of the casing 1 inside the housing 1, and said corresponding surface 9 forms a flat surface, and (v) one adjustment device 26 is provided. , thereby adjusting a desired swing angle within a predetermined maximum swing range; It is equipped with a stopper body 37,
The stopper main body 37 cooperates with another stopper 38 fixed to the casing 1,
A swing piston motor characterized in that, thereby, the angle of the stopper body 37 or the stopper 38 with respect to the rotation axis 10 of the drive shaft 2 can be adjusted. 2 (a) Casing 1 is a seamless shell 21
The shell 21 completely accommodates the swing piston 3 and has an opposing surface formed on its inner surface (jacket surface 11) that cooperates with the vane seal 65; (b) the casing 1 further includes a cover 22, and the cover 22 covers the shell 21.
is closed, and its inner surface 79 is provided with a second opposing surface 9 that cooperates with the seal lip 75; (c) the drive shaft 2 is supported by the shell 21 of the casing 1; A swing piston motor according to claim 1. 3 Axial end faces 66, 67 of the bush 49
is provided with a bushing seal portion 68,
It projects into the casing 1 opposite the bushing 49 and the vane seal 65
3. The swing piston motor according to claim 1, wherein the jacket seal 64 and the jacket seal 64 are coupled to each other. 4. Claim characterized in that all sealing parts 64, 65, 68 on the swiveling piston 3 for sealing the swiveling piston 3 with respect to the casing 1 are made of one integral sealing element 51 A swing piston motor according to any one of items 1 to 3. 5 The pivot piston 3 is the pivot piston 3
is entirely surrounded by the integral sealing member forming the sealing portions 64, 65, 68, and the sealing portions 64, 65, 68 are molded onto the pivot piston 3. A swing piston motor according to any one of claims 1 to 4, characterized in that the swing piston motor is mounted in a straight line. 6 Seal portion 6 that seals the swing piston 3
6. The swing piston motor according to claim 1, wherein 4, 65, and 68 are made of an elastomer material. 7 Seal lip 7 of the jacket seal 64
5 is wedge-shaped, projects outward from the jacket seal 64, and is conical or tapered. Swivel piston motor as described. 8. Claims characterized in that the adjusting device 26 has an adjusting disk 35 mounted on the shaft 2, on which at least one angle-adjustable stop body 37 is provided. The swing piston motor according to any one of items 1 to 7. 9. Claim 8, characterized in that the stopper main body 37 is placed in an arcuate long hole of the adjustment disk 35, and the stopper main body 37 is adjustable and movable along the long hole. The swivel piston motor described in . 10. In order to limit the rotation angle, two stopper bodies 37 are provided adjacent to each other in the circumferential direction of the adjustment disc 35;
They rest on mutually spaced arc-shaped elongated holes 39 of the adjustment disk 35, and they are arranged on a common line coaxially surrounded by the shaft. Claim No. 8
9. The swing piston motor according to item 9. 11 The adjustment disc 35 has a friction lining 56 in the adjustment area of the stop body 37 arranged on at least one disc surface 57, 59, whereas the stop body 37 has a tensioning surface 58. The swing piston motor according to any one of claims 8 to 10, characterized in that the swing piston motor is fixed in a non-adjustable manner in a state where it is tightly held by the piston motor. 12. According to claim 11, the friction lining 56 has a sandpaper-like grained surface or has been subjected to a cold deformation treatment, e.g. a sanding treatment, on the adjusting disk. Swivel piston motor. 13. Claim 11 or 13, characterized in that the friction lining 56 and the adjustment disk 35 are either constructed in one piece or are constructed separately and are firmly connected to each other. The swing piston motor according to item 12.