JP3332944B2 - Pressure medium cylinder with cylinder tube with longitudinal slit - Google Patents

Abstract

In a fluid actuator with a slotted cylinder (1), a piston (3) is coupled to a power-output member (18) merely in such a way as to transmit axial forces. The power-output member (18) has a guide on the cylinder (1). The guide is designed in mirror image relative to a centre plane (14) through the cylinder axis (9) and the slot of the cylinder (1). On either side of the centre plane (14), the guide in each case has two guideways (11, 35 and 29, 31 and resp. 11, 36 and 30, 32). One guideway (29, 31 or 30, 32) runs at an angle to the centre plane (14) inside a sloping guide groove (27 or 28) in the cylinder (1) and is non-adjustable, while the other guideway (11, 35 or 11, 36) runs in or parallel to the outer surface (11) having the slot and at right angles to the centre plane (14) and is adjustable perpendicularly to this outer surface (11). To adjust this other guideway (11, 35 or 11, 36), a guide strip (35 or 36) adjustable by means of regulating screws (37 or 38) perpendicularly to the outer surface (11) is provided in the power-output member (18). In the guide designed in this way, faulty adjustments can easily be recognized and they cannot lead to any overloading of the connecting means (16). Expansion of the cylinder (1) caused by pressurising does not lead to jamming of the power-output member (18). Normal force loads of the power-output member (18) are transmitted free of wedge action to the cylinder (1). <IMAGE>

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a pressure-medium cylinder having a cylinder tube having a longitudinal slit and being closed on the end side, the cylinder tube being arranged on the slit side with respect to the slit. A piston is sealed and slidably guided in the cylinder tube by means of two piston packings arranged near its ends. In the area between the two sections, the coupling means which penetrates the slit and which is rigidly connected to the driver located in front of the slit on the outside of the cylinder pipe and which is closed on the inside of the cylinder pipe by both piston packings A seal belt that covers the slit with pressure medium tightly on the outside is arranged, and furthermore, the slit is connected with the outside by a joint. A cover belt is provided to cover except for the penetration range of the cylinder, and a force releasing member that is guided slidably in the axial direction along the outside of the cylinder tube is provided, and the force releasing member at least slits the driven body. The guides of the force-releasing elements, which extend through the slit and are configured symmetrically about a central plane containing the cylinder axis, are provided on both sides of the slit. Has two flat guide tracks extending at an angle to one another and axially parallel to each other, the guide tracks being adjustable to one guide groove arranged in the cylinder tube and to the force-releasing member. Between the driver and the force-releasing member with limited lateral and rotational movability between the driver and the force-releasing member. Transmits the axial force at About of the type forming apparatus is located.

[0002]

2. Description of the Related Art European Patent Application Publication No. 157892
In a pressure-medium cylinder of the above-mentioned type, which is known from U.S. Pat.
It is configured as described in German Offenlegungsschrift 31 24 915 or European Patent Application Publication No. 68088, which corresponds to that specification. In the guidance described in DE-A-31 24 915 or EP-A-68088, the force-releasing element at least partly has a wedge-shaped guide on the side of the cylinder tube. It covers the area where the groove is integrally formed. The force-releasing element has a guide strip which engages in a wedge-shaped groove with a correspondingly arranged roof-shaped guide surface. The guide strip can be adjusted perpendicular to the center plane by means of an adjusting screw arranged on the force-releasing member at right angles to the center plane. With this configuration of the guide of the force release element, it is desired to prevent the cylinder tube from expanding due to the pressure medium load. However, this task can hardly be solved by the guidance described above to work. This is because, when the cylinder tube expands and presses against the guide strip, the force releasing member is caught on the cylinder tube and becomes almost immobile. In EP-A-157 892, the guide is therefore designed in such a way that it must have some play for a smooth movement. This certain play must obviously be present at the time of the maximum pressure medium impact of the pressure medium cylinder and thus also at the maximum expansion of the cylinder tube, and this play can be adjusted with the aid of the adjusting screw . In the event of a slight pressure medium impact, the cylinder shrinks again with a reduced width of the slit, so that if there is such a small or no pressure medium impact, there will be a correspondingly large play. The force-releasing element is no longer guided correctly. Furthermore, in order to carry out accurate guidance, the guide strip must be movably guided in the force-releasing element in a direction perpendicular to the center plane. In other words, this guide requires a sliding guide with play of the guide strip in a direction parallel to the central plane in the groove of the force-releasing member that receives the guide. This sliding play, which impairs the accuracy of the guidance of the force-releasing element, cannot be influenced by the adjusting screw, and is therefore not adjustable and depends exclusively on manufacturing errors and wear.

[0003] This known pressure medium cylinder further comprises:
With the aid of an adjusting screw, there is a risk that the above-mentioned certain play is erroneously adjusted in a pressureless cylinder. In such a case, a certain amount of play is immediately consumed when the pressure medium is loaded, and when the load of the pressure medium is further increased, the force releasing member is pressed against the cylinder tube by pressing the guide groove to the guide strip. The pressure medium cylinder is broken as a result. In addition to the possibility of misadjustment described above, with this guidance, the risk of misadjustment is further increased if the guidance has a very large play. In other words, starting from this extremely large play, if only one guide strip is misadjusted using only the adjusting screw arranged on one side, the force releasing member is misadjusted in a direction perpendicular to the center plane. The follower, which is configured as a web which is shifted towards the side of the guide strip which has been shifted and which penetrates into the slit, contacts the slit wall, whereby excessive play is eliminated. The force-releasing element is incorrectly assumed to be correctly adjusted. Such a misalignment of the pressure medium cylinder can immediately damage the pressure medium cylinder. Such a misalignment can also occur in pressure medium cylinders having the same guidance, as described in EP-A-157 892. This is because, depending on the coupling device disclosed in this specification, no lateral sliding between the driver and the force release member is possible. Therefore, when the force releasing member slides in the lateral direction, the entrainer is entrained, and the web-like connecting means of the entrainer is pressed against the slit side wall.

Other disadvantages of this known guide include the following. That is, as often occurs in actual cylinder operation, when a vertical load is applied to the force releasing member, that is, the force releasing member is extended by a force extending in the center plane and perpendicular to the cylinder axis. When loaded, the force is transmitted to the cylinder tube via guide tracks arranged in a wedge shape, thereby transmitting the force to a virtual guide track extending perpendicular to the direction of force. In comparison, an increased force corresponding to the wedge angle is transmitted, together with an increased friction and wear.

A mating key extending laterally between the driver and the force-releasing member, in order to enable a lateral slidability between the driver and the force-releasing member with the advantages obtained thereby. As a coupling device is proposed by a patent application of the same year.

[0006] According to EP-A-234033 and EP-A-280309, a force-releasing element is arranged on the side of a cylinder tube and is supported on the cylinder tube along its length. It is known to guide by means of guide rods having a circular cross section, which are held on the cylinder tube only at the ends or only at the ends. In this case, however, the guide rod is an additional component that increases the cost of the pressure medium cylinder and requires more installation space. This is because the force-releasing element must cover the side of the guide rod and must be correspondingly wide. Furthermore, with this known guide, the force-releasing element can become caught when the cylinder tube expands under the load of the pressure medium.

[0007]

SUMMARY OF THE INVENTION The object of the invention is therefore to provide a pressure-medium cylinder of the type mentioned at the beginning in a simple manner in the following way, in particular with the aim of eliminating the above-mentioned disadvantages. So that the overall play in the guidance of the members is adjustable, i.e. that there is no non-adjustable partial play, and that the force-releasing element is caught by the enlargement of the cylinder tube and that unrecognizable misadjustments with adverse consequences So that advantageous force transmission during a vertical force load on the force releasing member is achieved.
Is to configure.

[0008]

SUMMARY OF THE INVENTION In order to solve this problem, according to an embodiment of the invention, in a pressure medium cylinder of the type described at the outset, the guide of the force-releasing member is arranged on one side of the slit inside the guide groove. And has on its outer surface another guide track, wherein one guide track is non-adjustable and extends at an angle to the center plane, and the other guide track is And a guide strip which is adjustable in a direction perpendicular to the outer surface.

[0009]

In the known pressure medium cylinder, as already mentioned, in order to adjust the guide strip with the aid of the adjusting screw, the guide strip is moved laterally with respect to the central plane at the force-releasing element. Must be guided. A laterally slidable guide of the guide strip requires a play between the guide strip and the force-releasing element, which play cannot be adjusted by means of an adjusting screw. On the other hand, in the configuration of the pressure-medium cylinder according to the invention, the guide play of the guide strip on the force-releasing member acting transversely to the central plane affects the play of the force-releasing member on the cylinder tube. And any play between the two members can be adjusted.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

As shown in FIGS. 1 to 3, the pressure medium cylinder has a cylinder tube 1 which is closed at the end by a cylinder cover 2. The cylinder cover 2 also serves for supplying pressure medium to the load chambers 4, 5 located on both sides of the piston 3.
The cylinder tube 1 has a substantially square cross section and has an eccentrically arranged cylinder bore 6 for guiding the piston 3. A plurality of holding and guiding grooves 7 are integrally formed on the outer wall of the cylinder hole 1. Cylinder wall 8 of cylinder tube 1 located in the direction of displacement of cylinder bore 6
Is cut by a slit 10 extending parallel to the cylinder axis 9.

The cylinder tube 1 has an outer surface 11 on the side of the slit 10, and has one side surface 12; 13 connected to the outer surface on the side. A central plane 14 extends through the center of the cylinder axis 9 and the slit 10.

The piston 3 is configured to extend relatively long in the axial direction, and has load chambers 4 and 5 near its both ends.
Each has one piston packing 15 for limiting the pressure. In the area between the two piston packings 15, the piston 3 has web-shaped connecting means 16 which penetrate the slit 10 and position the piston 3 outside the cylinder tube in front of the slit 10. Entrainer 1
7 is tightly coupled. The entrainer 17 is covered on the side opposite to the slit by a U-shaped force-releasing element 18 which, on both sides of the slit 10, is provided on both sides of the slit 10 by means of a guiding device, which will be described in detail later. It is guided slidably along the tube 1 in the axial direction.

The slit 10 is tightly covered by a seal belt 19 in the region of the load chambers 4 and 5 inside the cylinder tube by a seal belt 19, that is, in the region of the piston 3 and between the piston packings 15, the seal belt 19 is It is lifted from 10 and is guided through the guide passage 20 of the piston 3, whereby the slit 10 is free for the penetration of the coupling means 16. Outside the cylinder, the slit 10 is covered outside the area of the piston 3 by a cover belt 21, which is likewise lifted out of the slit 10 in the area of the piston 3, and includes a driver 17 and a force releasing member 18. Through which the coupling means 16 can penetrate the slit 10 and can be firmly connected to the driver 17, possibly being made in one piece with the driver 17. Is also good. To hold the cover belt 21 on the outer surface 10, the slit 10
A magnet belt 23 is embedded in the cylinder tube 1 on both sides of the
Outside of the range, a cover belt 21 made of a suitable material for this purpose is magnetically held. The holding of the belt, however, can also take place in other known ways.

In order to connect the driver 17 and the force releasing member 18, the driver 17 has a transverse groove 24 on the side opposite to the slit, substantially in the middle of its longitudinal length,
To each of the lateral grooves, one notch 25 is provided, which is provided on the force releasing member 18 and is aligned with the lateral groove 24. A mating key 26 is embedded in the lateral groove 24, in which case the end sections of the mating key 26 engage with the notches 25, ie the mating key 26 is at right angles to the center plane 14. Extending. The mating key 26 together with the transverse groove 24 and the notch 25 forms a coupling device between the entrainer 17 and the force release member 18, the coupling device comprising
Alternatively, the relative movement and the relative rotation between the entraining body 17 and the force releasing member 18 are enabled according to the play of the fitting key 26 in the notch 25.

As shown in FIGS. 2 and 3, one guide groove 27, 28 extends from the outer surface 11 on the side of the slit 10, and these guide grooves are integrated with the cylinder tube 1. Machined and inclined obliquely downward from the outer surface 11 towards the side surfaces 12;
It extends to converge toward. The walls of the guide grooves 27, 28 on the outer side, which are inclined and extend accordingly, form guide surfaces 29; 30 on which the corresponding guide surfaces of the force release member 18 slide. Movably in contact. That is, in this case, the guide surface of the force releasing member 18 is provided on the guide strips 31 and 32, and these guide strips are strip-like extensions projecting obliquely outward and downward of the force releasing member 18. It is firmly held by the part 33. The extension 33 has guideways 27, 2 with play on all sides.
8 is engaged. The guide surfaces 29, 30, together with the associated guide strips 31, 32, are each non-adjustable one guide track 2.
9, 31; 30, 32, the guide tracks of which extend obliquely with respect to the central plane 14 in a mirror image. On the outside, one section 34 of the force-releasing member 18 is connected to the extension 33, which section 34 covers the outer surface 11 up to the transition to the side surfaces 12, 13. On the outer side, a guide strip 35; 36 is embedded in the section 34 in a vertically slidable manner, that is, slidably parallel to the central plane 14. The guide strips 35, 36
Like the guide strips 31, 32, they extend parallel to the cylinder axis 9. The lower sides of the guide strips 35, 36 slidably contact the flat edge strip sections of the outer surface 11.
Adjusting screws 37, 38 are adjustably screwed into the two sections 34, and extend parallel to the central plane 14 and are perpendicular to the cylinder axis 9. Over the longitudinal extension of the force release member 18 in the direction of the cylinder axis 9, each section 34 is provided with a plurality of adjusting screws 37; The screwing of the adjusting screws 37, 38 with the section 34 may be of a self-locking type, however, in a manner not shown, a counter nut is provided for fixing the respective adjusting position. May be. The outer ends of the adjusting screws 37, 38 are in contact with the guide strips 35, 36 on the opposite side of the outer faces of the guide strips 35, 36 via support strips 39. In other words, the support strip 39 extends parallel to the cylinder axis 9 and is slidably guided parallel to the central plane 14 together with the guide strips 35, 36. The guide strips 35, 36 thereby form adjustable guide tracks 11, 35; 11, 36 together with the outer surface 11, which guide tracks lie in a plane perpendicular to the central plane 14. ing.

Using the adjusting screws 37, 38, the guide strip 3
The height position of 5, 36 is adjustable, in which case the desired playability or sliding possibility remains in the guide tracks 29, 31; 30, 32; 11, 35; The discharge member 18 is adjusted relative to the cylinder tube 1 as desired and is slidably guided. The guide tracks 29, 31; 30, 32 in this case take up the side guidance of the force-releasing member 18 and prevent the force-releasing member 18 from lifting upwardly from the cylinder tube 1. Guide strips 35, 36 for possibly occurring sections 34
Side play does not affect the quality of the side guidance of the force release member 18 with respect to the cylinder tube 1. Guide strip 3
The lateral play of the guide strips 5, 36 has no effect on the vertical position of the guide strips 35, 36 relative to the section 34, which is defined by the adjusting screws 37, 38, so that the lateral play is not affected. Has no effect on the quality of the guidance of the force releasing member 18 in the cylinder tube 1. Erroneous adjustment by the adjusting screws 37 and / or 38 can easily be confirmed in any case. That is, if only one of the adjusting screws 37 or 38 is screwed very deeply, the force releasing member 18 causes the cylinder tube 1 to be caught in the guide track under slight side sliding of the force releasing member 18, What is important in this case is that said lateral sliding of the force releasing member 18 is possible within the play of the coupling means 18 in the slit 10, so that the force releasing member 18 It does not touch the side walls. If the adjusting screws 37 and / or 38 are pulled out too far, a very large guide play is created for the force release element 18. Jamming and very large guiding play can be ascertained and corrected without difficulty. When the cylinder tube 1 is expanded by the pressure medium load after the adjustment, the guide groove 2
The play on the central plane side between 7, 28 and the extension 33 is somewhat reduced, in which case there is no contact which hinders movement. That is, in this case, the guide tracks 29, 31;
The play at 30, 32 increases slightly, however, this slight increase in play does not impair the functionality of the pressure medium cylinder. When the force-releasing member 18 is loaded by a normal force extending in or parallel to the central plane 14 and perpendicular to the cylinder axis 9, the force is guided at right angles to the direction of this force. Orbit 1
1, 35; 11, 36, that is to say, in this case, no wedge effect occurs, which increases the load on the guide tracks 11, 35; 11, 36. The transmission of forces can therefore take place with little friction and correspondingly small wear.

In the embodiment of FIG. 4, the force release member 18 engages with its guide legs 40 on the sides of the guide tracks 11, 35; 11, 36 in the upper sections of the side surfaces 12, 13 of the cylinder tube 1. ing. Guide grooves 41 and 42 extend from the side surfaces 12 and 13 in the engagement area, and these guide grooves extend in the cylinder tube 1 at a substantially oblique angle toward the outer surface 11. The outer walls of the guide grooves 41 and 42 form guide surfaces 43 and 44. These guide surfaces correspond to the guide surfaces 29, 30 of the embodiment shown in FIG. 2, so that these guide surfaces 43; 44 are provided with guide legs 40, which engage the guide grooves 41, 42. The guide strips 31, 32, which are rigidly connected to the sections, are in contact. This results in guide tracks 31, 43; 32, 44, which are not present in their function in the embodiment of FIG.
1: 30 and 32. The other configuration of the pressure-medium cylinder shown in FIG. 4 corresponds completely to the embodiment shown in FIGS. 1 to 3 and, therefore, the other components are designated by the same reference numerals. Accordingly, the features and advantages described for the embodiment shown in FIGS. 1-3 are equally applicable to the embodiment shown in FIG.

The embodiment shown in FIG.
35, 11, 36; 31, 43; 32, 44 completely correspond to the embodiment of FIG. 4, so that the embodiment of FIG. 5 also corresponds to the previously described embodiment. It has the functional forms and advantages mentioned. The difference between the embodiment shown in FIG. 5 and the embodiment shown in FIG.
Only with respect to the adjustment device. In the embodiment of FIG. 5, the adjusting screws 37, 38 are screwed into the guide legs 40 in an axial direction perpendicular to the central plane 14. The adjusting screws 37 and 38 are
Acting on the slidable wedges 45 at the force releasing member 18, these wedges are slidably supported on the force releasing member 18 via wedge surfaces 46 on the side opposite the outer surface, and On the side facing the outer surface, they are slidably supported by guide strips 35, 36, which may, in some cases, be
This takes place via a strip (not shown) corresponding to the support strip 39. The wedge surface 46 extends from the center plane 14 to the outer surface 11.
The wedge surface slides together with the guide strips 35, 36 toward the outer surface 11 inside the force release member 14 when the adjusting screws 37, 38 are screwed in. I'm sullen. Also in this embodiment, the adjusting screws 37 and 38 may be configured as a self-locking type, or may be configured to be fixed by a counter nut.

Of course, in the embodiment shown in FIGS. 2 and 3, a post-wedge adjustment can likewise be made as in the embodiment of FIG. In the embodiment shown in FIGS. 4 and 5, it is also possible to construct the guide grooves 41, 42 on the side opposite to the outer surface 11 into a T-shape as shown, in which case the guides are provided. The grooves 41, 42 are likewise suitable for holding a member fixed to the cylinder tube 1, for example a limit stop for the force release member 14. In a variant of the embodiment shown in FIGS. 2 and 3, it is advantageous if the cover belt 21 has a width which is greater than the distance between the open edges of the two guide grooves 27, 28 which are separated from one another. In other words, the chamber 22 and thus the entire force release member 18 can be correspondingly wide in this case for guiding the cover belt 21 through the force release member 18. With this change, the cover belt 21 can cover not only the slit 10 but also both the guide grooves 27 and 28 outside the force releasing member 18, thereby preventing contamination. A pressure medium cylinder configured in this way is particularly suitable for operation in a potentially polluting environment.

The guide strips 35, 36 are provided on the guide tracks 11, 3
5; 11, 36 do not have to cooperate directly with the outer surface 11 extending over the entire width of the cylinder tube, the guide strips 35, 36 being rather displaced vertically relative to the remaining outer surface 11. The outer surface section can also be contacted. In other words, the vertical displacement facilitates machining of the surface section of the cylinder tube 1 which cooperates with the guide strips 35, 36.

In all embodiments, the guide strips 31, 3
2, 35 and / or 36 can be assembled from one end face of the force release member 18, even if the force release member 18 is already present in the cylinder tube 1. This makes it possible to easily replenish the worn guide strip.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a pressure medium cylinder according to the present invention.

FIG. 2 is an enlarged sectional view of the pressure medium cylinder shown in FIG. 1 along the line AA.

FIG. 3 is an enlarged sectional view taken along line BB of FIG. 1;

FIG. 4 is an enlarged sectional view corresponding to FIG. 3, showing another embodiment of the pressure medium cylinder.

FIG. 5 shows yet another embodiment of a pressure medium cylinder;
FIG. 5 is an enlarged sectional view corresponding to FIG. 4.

[Explanation of symbols]

1 Cylinder pipe, 2 Cylinder cover, 3 Piston, 4,5 Load chamber, 6 Cylinder hole, 7 Holding and guiding groove, 8 Cylinder wall, 9 Cylinder axis, 1
0 slit, 11 outer surface, 12, 13 side surface,
14 center plane, 15 piston packing, 16 coupling means, 17 driver, 18 force releasing member, 19
Seal belt, 20 guide passage, 21 cover belt, 22 chamber, 23 magnet belt, 24 side groove, 25 notch, 26 fitting key, 27, 28
Guide groove, 29, 30 guide surface, 31, 32 guide strip, 33 extension, 34 section, 35, 36 guide strip, 37, 38 adjusting screw, 39 support strip,
40 guide legs, 41, 42 guide grooves, 43, 44
Guide surface, 45 wedge-shaped member, 46 wedge surface

Claims (8)

(57) [Claims] 1. A pressure medium cylinder comprising a cylinder tube (1) having a longitudinal slit and closed at an end side, wherein said cylinder tube (1) has a slit (10) on a slit side. ), The piston (3) is sealed in said cylinder tube (1) by means of piston packings (15) arranged near both ends thereof. The piston (3) is guided slidably in the area between the two piston packings (15) by means of coupling means (16) passing through the slit (10) on the outside of the cylinder tube. The follower (1) located in front of the slit (10)
A seal belt (19) is arranged inside the cylinder tube and outside the section closed by the piston packings (15) and tightly covering the slit (10) with a pressure medium. And a cover belt (21) which covers the slit (10) outside of the coupling means (16) except at the outside thereof is provided, and is slidably guided along the outside of the cylinder tube in the axial direction. A force releasing member (18) is provided, said force releasing member covering said entrainer (17) at least on the side and side opposite the slit and passing through said slit (10). Extending and symmetrically arranged about a central plane (14) containing the cylinder axis (9), guide paths for the force releasing member (18) are located on both sides of the slit (10). And it extends axially parallel at an angle to each other, the flat two guideways (29, 31; 31,
43; 11, 35; 30, 32; 32, 44; 11, 3
6), wherein the guide track includes a guide groove and a guide strip arranged in the cylinder tube (1), and the follower (17) and the force releasing member (18). Between said driver (17) and said force-releasing member (18) with limited lateral and rotational possibilities
And a connecting device for transmitting an axial force between the slit (1) and the slit (1).
0), the guide grooves (27, 28;
41, 42), one guide track (29, 31; 3)
0, 32; 31, 43; 32, 44) and the other guide track (11, 35; 11, 3) on the outer surface (11).
6), and the one guide track (29, 31;
31, 32; 31, 43; 32, 44) cannot be adjusted and the force releasing member is oriented upward in a cross section perpendicular to the cylinder axis (9), and is inclined in a C-shape to extend in the longitudinal direction. And the other guide track (11, 3
5; 11, 36) extend parallel to said outer surface (11), said other guide track being adjustable in a direction perpendicular to said outer surface (11).
5; 36), characterized in that it has a cylinder tube with a longitudinal slit. 2. The guide groove (27, 28) extends obliquely from the outer surface (11) toward the side surface (12, 13) of the cylinder tube (1). The guide surface (29, 30) is provided with the guide groove (27, 2).
8. The pressure medium cylinder according to claim 1, wherein the pressure medium cylinder is located on an outer slope when viewed from the cylinder axis. 3. The cover belt (21) has a width greater than a distance between opening edges of the guide grooves (27, 28) that are separated from each other, and not only the slit (10) but also the slit (10). 3. The pressure medium cylinder according to claim 2, wherein the pressure medium cylinder also covers the openings of the two guide grooves (27, 28). 4. The guide groove (41, 42) obliquely extends from the side surface (12, 13) of the cylinder tube (1) connected to the outer surface (11) to the outer surface (11). It extends at an angle to one of the guide surfaces (43, 43).
The pressure medium cylinder according to claim 1, characterized in that the guide groove (44) is located on an outer slope of the guide groove (41, 42) as viewed from the cylinder axis (9). 5. The pressure medium cylinder according to claim 4, wherein the guide grooves (41, 42) are separated from the outer surface (11) and extend in a T-shaped groove. 6. The guide strip (35, 36) held by the force releasing member (18) is provided with the force releasing member (1).
6. The pressure medium according to claim 1, wherein the pressure medium is adjustable in 8) by means of an adjusting screw (37, 38) arranged at right angles to the outer surface (11). Cylinder. 7. A wedge, wherein said guide strips (35, 36) are arranged on said force-releasing member (18) and have a wedge surface (46) extending obliquely with respect to said outer surface (11). The wedge-shaped member (45) is supported at right angles to the outer surface (11) by a shape member (45) and the wedge-shaped member (45) is perpendicular to the center plane (14).
6. The pressure-medium cylinder according to claim 1, wherein the pressure-medium cylinder is adjustable by an adjusting screw (37, 38) arranged at 8). 8. The wedge surface (46) is arranged to be inclined so as to expand from the outer surface (11) in a direction away from the central plane (14). Pressure medium cylinder.