Valve, device for regulating pressure of flow medium using the valve, and device for fixing the valve in a transmission component

Abstract

The invention relates to a valve (20) having a valve housing (2), at least one piston (3) and at least one spring (5), the valve having the following features: the piston (3) and the valve housing (2) are arranged coaxially with respect to one another on an imaginary valve axis (6), the valve axis (6) being oriented axially in a first axial direction and in a second axial direction opposite to the first axial direction, the piston (3) being received in the valve housing (2) in an axially displaceable manner against the spring force of the spring (5), and a first opening (8) of the valve housing (2) through which a flow medium can pass faces axially towards the piston (7) and can be closed by the piston (3), wherein at least one ring (14) surrounding the valve axis (6) is fixed to the first opening (8) and at least one seal (15) is held against the valve housing (2) by means of the ring (14). The invention also relates to a device (37) for regulating the pressure of a flow medium in a vehicle transmission and to a device for fixing a pressure compensation valve (1).

Description

Technical Field

[0001] The invention relates to a valve having a valve housing, at least one piston and at least one spring, the valve having the following features:

[0002] the piston and the valve housing are coaxial with each other on an imaginary valve axis, which is axially oriented in a first axial direction and in a second axial direction opposite to the first axial direction,

[0003] - the piston is received in the valve housing in an axially movable manner against the spring force of the spring, and

[0004] A first valve housing opening, through which a flow medium can pass, faces axially toward the piston (7) and can be closed by the piston (3). The invention also relates to a device for regulating the pressure of a flow medium in a vehicle transmission and to a device for fixing a pressure compensation valve in a component of a vehicle transmission. Background Art

[0005] Valves of this type are fixed in the housing in various ways. DE 10 2007 002 445 A1 shows a valve fixed in the housing by means of a welded joint. This fixing technology requires weldable materials of the same design for the housing and the valve or the fixing element. Therefore, it is difficult to make such a connection when the valve is inserted into a housing of a vehicle transmission, for example made of an aluminum alloy. In addition, due to the heat input during welding and possible welding spatter, the welded joint cannot usually be used in all cases. Other valves are screwed in, as disclosed in US 2 590 244 A. This fixing requires relatively complex preparation of the valve seat, because the thread must also be made in the hole of the valve seat in the housing. DE 197 39 904 A1 shows a valve that is axially fixed in the valve seat by caulking. During the production of the caulking, the material is plastically displaced from the housing by the punch and pressed against the back of the valve. There are special requirements for the manufacture and assembly of valves whose valve bodies also have inlet openings or outlet openings that are oriented transversely to the valve axis. Such a valve is disclosed in DE 10 2015 211 599 A1. For such valves, an oriented assembly is usually necessary so that the transversely oriented opening of the valve body and the opening of the associated channel in the housing are connected in such a way that these openings can penetrate each other. Summary of the invention

[0006] The object of the invention is to create a valve with which the requirements imposed on such valves can be implemented by simple and cost-effective measures.

[0007] This object is achieved by a valve according to the subject matter of claim 1. Furthermore, the device according to the invention is provided with a valve.

[0008] At least one ring surrounding the valve axis is fixed to the first opening, with at least one seal being retained to the valve housing by the at least one ring.

[0009] A valve of this type is known from DE 197 31 557 A1, which is held together in the area of ​​the inlet opening by a fastening part. On the one hand, the fastening part serves to hold the valve plate with the valve seat on the valve housing and, on the other hand, the fastening part serves as a seal for the valve seat in the housing. Alternatively, the valve seat is formed on the fastening part. In this case, the valve seat is understood to be a sealing stop for the valve body (piston) on the fastening element in the vicinity of the inlet opening of the valve housing, the valve plate or the valve. For the function of the valve seat as a seal, the fastening element is provided with a layer made of an elastomer. The elastomer on the fastening element elastically ensures a good sealing effect on the valve seat and at the same time compensates for manufacturing tolerances on the valve seat.

[0010] On the contrary, the device according to the invention provides a seal separated from the valve seat, which is maintained by a ring that is also separated from the valve housing. The seal is a simple component that can be mass-produced at low cost, which is formed by an O-ring in its simplest and most effective form. The O-ring has a circular, oval or any other cross-section. The material of the seal is preferably an elastomer or other elastic material. Alternatively, the seal can also be made of several parts, optionally integrally formed with a metal part. The ring used to hold the seal on the valve is also a simple component, which can be made cheaply from plastic or preferably from a metal sheet. On the other hand, it is generally more complicated to manufacture parts with an elastomer coating according to the background technology of the art cited previously. When choosing a material, it must also be taken into account that its material properties must be suitable for bonding with a substrate, and therefore the choice of materials is limited. In addition, the thickness of the elastomer layer is limited, both for processing reasons and for the function of the fastening part that is also used to hold the valve plate. On the other hand, the seal of the valve according to the invention can be designed as a separate component in terms of its size and material to be specifically used for the intended sealing function and compatibility with the flow medium. This seal can be adjusted to changing requirements without any changes to the valve or the ring itself. If the requirements change, for example with regard to the dual function part as an anti-rotation device, the ring itself can also be easily replaced without the seal or valve being replaced.

[0011] With regard to the dual function of the ring, one embodiment of the present invention provides that at least one anti-twist device is fixed to the first opening. In this case, the anti-twist device refers to a device that ensures that the valve is accurately seated in a predetermined position in the housing. This is to prevent the valve from rotating around its own valve axis and / or sloshing in the axial direction in the hole of the housing. The anti-twist function is integrated into the ring, so the ring has a dual function. On the one hand, the ring is used to hold the seal, and on the other hand, the ring provides an anti-twist device. The anti-twist device also helps with directional assembly and helps to position the valve in the correct position in the component. The correct position of the valve ensures the position of the opening of the valve relative to the inlet channel and the outlet channel. The ring is preferably fixed to the valve housing in a form-fitting manner. Therefore, in this case, the connection between the anti-twist device and the valve housing preferably does not include material bonding. The anti-twist device or the ring has at least one radial protrusion oriented transversely to the valve axis. The protrusion can, for example, be used for a form-fit connection for position orientation during the subsequent installation of the vehicle transmission and / or for fixing the position of the valve. The ring or the anti-twist device can advantageously be manufactured as a single part and then fixed to the valve housing in a form-fitting manner. This makes it possible, for example, to adapt the position and orientation of the protrusion, and therefore the position of the anti-twist device to the specific features of different installation situations. In this regard, the valve or valve housing itself does not need to adapt to the changing installation situation. Therefore, the unified design of the valve or valve housing can be used for different applications and position orientations. The valve housing can be manufactured in larger production batches and therefore at low cost. It is only necessary to bear the relatively high mold cost for manufacturing the valve housing once. If necessary, it is only necessary to adapt the anti-twist device to the application, or only need to change the orientation of the anti-twist device or the protrusion of the anti-twist device on the valve, and the anti-twist device can be used for several applications. Even for small batch production, the mold required for the ring / anti-twist device can also be cheap and easily designed. The protrusion can be fixed to the valve housing at any position around the valve axis by selecting a suitable form-fit connection. The non-detachable form-fit connection ensures a firm non-twist installation. The non-detachable form-fit connection allows the valve housing and the ring to be snapped together, hooked together or interlocked together via plastic deformation of the ring and / or part of the valve housing. It is not excluded to provide force fit and form fit connection, or alternatively material bonding connection.

[0012] One embodiment of the invention provides that the projection at least partially projects radially beyond the outer contour of the valve housing.

[0013] For example, when the valve is axially supported at the end in a blind hole or a housing shoulder, a projection protruding beyond the valve housing engages in a positively locking manner in a recess or groove at the bottom of the blind hole or in a corresponding recess in the housing shoulder.

[0014] According to one embodiment of the invention, the ring comprises at least one annular base body. The projection then protrudes from the base body, for example, wherein it is not excluded that the ring has more than one projection in the case where it also functions as an anti-twist device. The annular base body engages axially in the first opening and at least at one point axially behind the edge of the first opening. In this way, the ring is fixed at least in one axial direction, since the edge forms an axial undercut. The special profile of the ring protrudes radially beyond the opening cross section of the first opening. In this way, the ring remains immobile in the axial direction, depending on the use of at least one or two undercuts.

[0015] In one embodiment of the present invention, the edge includes a hollow cylindrical portion integrally designed with the valve housing and surrounding the first opening. The design of the hollow cylindrical portion provides more possibilities for designing a form-fit connection. In a preferred embodiment, the diameter of the hollow cylindrical portion is radially offset relative to the outer diameter of the valve, that is, the first outer diameter of the hollow cylindrical portion is less than the second outer diameter of the outer cylindrical profile of the valve housing and greater than the first inner diameter of the opening and / or the first opening of the hollow cylindrical portion. This arrangement makes it possible to place the base body of the ring on the valve body in a form-fitting manner, and the valve body does not radially protrude beyond the outer profile of the valve housing. In addition, the hollow cylindrical portion is preferably used as a seat for the seal on the outside. The seal is optionally pressed onto the hollow cylindrical portion, or pushed or loosely installed on the valve axis by a close seat, and is therefore centered on the valve axis. The seal preferably has a radial dimension that is too large relative to the diameter of the cylindrical outer surface of the valve housing, and the seal is seated in the hole or channel of the component with this excessive radial dimension. The radial interference is designed to serve a sealing function, for example for elastic preloading.

[0016] According to another embodiment of the invention, the ring can be inserted into the first opening of the valve housing. As a result, the seat of the ring takes up less space radially outwards, because the base body of the anti-twist device is fixed in or inserted into the opening and / or the hollow cylindrical part, and only the ring or the collar of the anti-twist device extends outwards. Advantageously, this creates more space for the seal, so that, for example, the elastic behavior of the seal can be specifically adapted to certain application conditions by means of a larger material volume.

[0017] By another embodiment of the present invention, it is provided that the first ring and the second ring are formed on the base body. The first ring is oriented radially outward away from the valve axis and can be folded in this direction, for example, by plastic forming the tubular or flat blank of the ring. In addition, the ring is provided with a projection required for fixing the position of the valve in a form-fitting manner. The second ring is oriented radially outward away from the valve axis and axially engages behind the edge on the inner side of the valve, that is, on the other side of the first opening, that is, on the inner side of the valve of the first opening. The seal is maintained by the outer first ring and axially located between the first ring and the valve housing. Here, the seal is seated at the entrance of the first opening on the hollow cylindrical part. Alternatively, the ring also surrounds the hollow cylindrical part, and the seal is radially seated on the ring, preferably centered on the base body of the ring.

[0018] If the ring also serves as an anti-twist device, the seal and the anti-twist device are thus held in a simple and form-fitting manner on the edge of the first opening in both axial directions. The collar is preferably produced by plastic forming from a blank of the ring, which is preferably made of sheet steel.

[0019] Another embodiment of the present invention provides that the valve seat for the piston is formed at the edge of the first opening, wherein the first opening can be closed by the piston abutting the valve seat. The valve seat is an annular surface that corresponds to the geometry of the edge or surface of the piston in a sealing manner. For example, the annular surface is designed on the ring, for example, preferably on the second ring ring. This has the following advantages: the sealing seat of the piston on the ring can also be variably designed to adapt to different applications, while the basic design of the valve housing, and therefore the production of the valve housing is not affected by the type of the sealing seat. Larger batches of valve housings can be produced. Therefore, the production cost is low. Alternatively, a preferred embodiment of the present invention provides that the valve seat is directly formed on the valve housing material. The valve housing can be cheaply manufactured as a pressed part and / or a drawn part by a metal sheet. The material of the plate is preferably steel. The formation of the valve seat can be integrated into the pressing or drawing process without additional effort. The design of the ring, the anti-twist device and the sealing device can still be unaffected by the design of the valve seat.

[0020] According to another embodiment of the present invention, a second opening permeable to the flow medium is formed in the valve housing. The second opening can be at least partially closed by the piston. The valve axis extends through the first opening in the axial direction, that is, the first opening is axially oriented. The second opening is radially spaced from the valve axis. The protrusion radially protrudes beyond the valve housing, wherein the protrusion is radially oriented transversely to the valve axis. As seen in the flow direction of the flow medium, the second opening is located behind the seal, so that when the valve is used in a device for regulating the pressure of the flow medium in a vehicle transmission, the seal is used to ensure that the flow of the flow medium flows through the valve completely without loss via the first opening and leaves the valve again at the second opening.

[0021] In the above context, the present invention provides a device for regulating the pressure of a flow medium in a vehicle transmission. The device is formed by a part of a transmission component, at least a first channel and a second channel and a valve, and additionally has a device for fixing the valve in the transmission component or for assembling it in a position-oriented manner in the transmission component. The valve is seated in a channel or through hole or in a blind hole of the transmission component. A possible leakage gap formed at the valve seat in the component between the transmission component and the valve is sealed with the help of a seal. In this regard, the seal is supported on the valve housing and / or the ring, preferably radially preloaded in one direction and another radial direction relative to the component. This arrangement prevents the flow medium from accidentally reaching the rear of the valve via the seating of the valve housing in the transmission component and / or prevents the flow medium from mixing with another medium at the end of the valve away from the first opening. In addition, if applicable, an unexpected pressure balance or pressure loss via the leakage gap is prevented.

[0022] In this part of the transmission component, the first channel opens into the first opening and the second opening opens into the second channel. The projection formed on the ring engages in the recess of the transmission component. The device for fixing the pressure compensation valve in the transmission component is formed only by the projection and the recess and is therefore very simple and inexpensive to produce. In addition, the ring of the device has two functions. One function is an anti-twist device and the other function is to hold the seal on the valve.

[0023] For example, the position-oriented assembly ensures that the second opening and the second channel are precisely aligned with each other. This is particularly advantageous when, as provided in one embodiment of the invention, the first opening and the piston base are arranged coaxially to the valve axis, while the second opening is oriented transversely to the first opening in the valve housing. The form-fit connection formed by the first projection and the recess between the valve and the transmission component is advantageously formed on the side of the valve housing opposite the second opening, for example, the recess being a longitudinal groove in the transmission component designed as a housing or a transmission shaft.

[0024] The valve is provided with a sleeve-shaped valve housing having a sleeve shell oriented concentrically with the valve axis and an edge made of sheet metal, which is oriented radially in the direction of the valve axis and extends around the first opening. The valve seat is stamped directly into the edge made of sheet metal. Such a solution can be produced very cheaply. Expensive machining of the valve seat is not required. The projection protrudes from the anti-twist device or the first ring at the edge of the first opening.

[0025] The piston is sleeve-shaped, having a hollow cylindrical piston housing and a piston base closing the piston on one side, wherein the spring is axially surrounded by the piston housing and axially supported on the piston base inside the piston. The piston is preferably made of sheet metal. The piston base is correspondingly thin-walled. Compared with a solidly formed piston, more axial space and installation space for the spring can be obtained inside the piston, because the spring is axially inserted into the piston and supported on the back side of the piston base surface facing the first opening. This provides more options for the selection and design of the spring. The spring can also include several springs connected in parallel or in series.

[0026] The second opening is oriented transversely to the first opening and is preferably introduced into the valve housing made of sheet metal by stamping. The second opening extends in the axial direction at a radial distance from the valve axis. The center axis of the opening extends in a radial direction perpendicular to the valve axis. The valve housing can be produced easily and inexpensively.

[0027] The piston is guided in the valve housing in an axially displaceable manner via a piston housing and is radially centered in the valve housing. This advantageously results in a substantially pressure-tight and at the same time axially displaceable guidance of the piston in the valve housing, in particular when the radial play of the piston radially centered in the housing is very small. For example, the play is 30 μm. When these components are drawn from sheet metal without machining, the sliding surfaces, i.e. the diameter of the inner cylindrical surface of the valve housing and the diameter of the outer cylindrical surface of the piston, can be set very accurately. A sliding coating on the surface of the components may be advantageous.

[0028] The piston is guided to be able to move axially from the closed position to the open position in the valve housing against the spring force of the spring. In the closed position of the piston, the first opening is closed by the piston base and the second opening is at least partially closed by the piston housing. In the open position, the piston base is disengaged from the valve seat. At least one edge or contour of the piston releases the second opening similarly to the control edge so that a connection is formed between the first opening and the second opening through which the flow medium can flow. Affected by the leakage gap caused by the radial play through the piston, the open end of the valve housing axially opposite to the first opening is separated from the flow medium by the piston in both the closed position and the open position.

[0029] The second opening as a return opening is already or still in the closed position, in which case the second opening is only partially closed by the piston housing. This means that the slot-shaped through-opening through which the flow medium of the second opening can flow is not covered by the piston housing and is not closed by the piston in the closed position. The slot-shaped through-opening is at least defined by a part of the piston and the edge of the second opening in the closed position. The advantage of the present invention is that after the valve is opened, a passage through which the flow medium can flow is immediately formed between the first opening and the second opening, and the pressure is rapidly reduced. This has a favorable effect on the design of the spring.

[0030] The same effect can be achieved if an annular channel is formed between the piston and the valve housing, which is directly connected to the valve seat. The annular channel can be designed as required by the design of the valve housing and the piston. The annular channel is filled with the flow medium immediately after the piston leaves the valve seat. The pressure of the flow medium is thereby transferred to a larger area of ​​the piston.

[0031] The same effect can also be achieved if the piston base and the piston housing are connected to each other by means of a transition section formed on the piston.At least in the closed position, the annular channel is delimited by the transition section and the part of the valve housing opposite the transition section.

[0032] A combination of the two measures mentioned above is provided. In the closed position of the piston, the annular channel is already open at the groove-shaped through-opening towards the second opening.

[0033] According to the above measures, it has the result that the pressure required to open the valve is greater than the pressure prevailing in the valve when the piston has left the valve seat. The advantage of this arrangement is that the value of the pressure for opening and closing the pressure-compensating valve according to the invention can be set constant and reliable during this process, and pressure compensation takes place in a very short time. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The invention is described below with reference to an exemplary embodiment and other embodiments of a valve / pressure compensating valve. In this case, the valve is designed as a pressure compensating valve and is installed in a device for regulating the pressure of a flow medium and is fixed by means for fixing the valve or the pressure compensating valve in a transmission component.

[0035] Figure 1 An overall view of the pressure compensation valve 1 is shown, through which the first opening 8 , the second opening 10 , the ring 14 with the anti-twist device 24 and the seal 15 can be seen.

[0036] Figure 2 A valve 20 designed as a pressure compensation valve 1 is shown in a longitudinal section along the valve axis 6 .

[0037] Figure 3A device 37 for regulating the pressure of a flow medium in a vehicle transmission is shown in a longitudinal section along the valve axis 6 .

[0038] Figure 4 The cross-sectional view oriented transversely to the valve axis 6 shows Figure 3 The device 37 shown in FIG.

[0039] Figure 5 The not-to-scale and enlarged illustration shows the Figure 1 Detail Z of an overall view of the pressure-compensating valve 1 . DETAILED DESCRIPTION

[0040] Figure 1 In the overall view of the valve 20 designed as a pressure compensation valve 1, the valve housing 2 with the first opening 8, the second opening 10 and the piston 3 of the valve 20 behind the second opening 10 can be partially seen. A ring 14 is fixed to the edge of the valve housing 2. A seal 15 designed as an O-ring sits on the edge.

[0041] Figure 2 and Figure 3 The pressure compensation valve 1 has a valve housing 2, a piston 3, a support element 4 and a spring 5. The valve housing 2 and the piston 3 are designed to be essentially rotationally symmetrical and are arranged coaxially with the valve axis 6. The valve axis 6 is oriented axially. The piston 3 is axially movable but is radially tightly guided in the valve housing 2 with a small radial play and is provided with a piston housing 9 and a piston base 7. The radial play is preferably 30 μm. The piston housing 9 is designed as a hollow cylindrical part and is oriented coaxially with the valve axis 6 and extends from the piston base 7 in the direction of the support element 4. The valve housing 2 and the piston 3 are sleeve-shaped components, which are preferably cold-formed, i.e. drawn and stamped, from a flat metal material. The spring 5 is a compression spring and is axially supported on the piston base 7 of the piston 3 in one direction and axially supported on the support element 4 in the other axial direction, so that the spring 5 is axially clamped between the piston base 7 and the support element 4. The support element 4 engages with the projection 28 in the circumferential groove 21 of the valve housing 2 and is thereby firmly supported by the spring action of the projection 28. Figure 1 7 and the closed position I shown in FIG. 7 moves to the closed position I against the spring force of the spring 5. Figure 3 The open position II is shown by the dashed line.

[0042] The support element 4 is seated on the rear side of the pressure compensation valve 1 in the valve housing 2. The support element 4 is designed to be elastic like a sawtooth ring and has a plurality of sawtooth projections 28 distributed about the circumference on the base body 31, which are axially fixed to the valve housing 2 with a form-fit connection. The form-fit connection is formed by the projections 28 and the circumferential grooves 21, wherein the projections 28 snap into place radially in the circumferential grooves 21. The base body 31 serves as an axial support and radial centering and guide for the spring 5.

[0043] The sleeve-shaped valve housing 2 is provided with a first opening 8 through which the flow medium can flow, and the sleeve-shaped valve housing is provided with a second opening 10 on its sleeve shell 2. The first opening is formed on the valve housing 2 on the head side of the pressure compensation valve 1, is arranged coaxially with the valve axis 6, and is vertically penetrated by the valve axis 6. The second opening 10 is oriented transversely to the first opening 8, that is, so that the second opening 10 extends in the axial direction at a certain radial distance from the valve axis 6.

[0044] The ring 14 is fixed to the edge 16 of the valve housing 2. The flange 22 of the ring 14 holds the seal 15 in place.

[0045] Figure 5 The ring 14 has an annular base body 19 and is provided with a first collar 22 and a second collar 36. The first collar 22 engages axially behind the edge 16 on the valve housing 2 on the outside of the valve, thereby protruding radially beyond the opening cross section of the first opening 8. The second collar 36 is also oriented radially outwards and engages axially behind an undercut on the rib 46 on the inside of the valve housing 2. In this way, the anti-twist device remains radially immobile at the narrowest point of the first opening 8 and remains axially immobile in one direction on the outside of the valve housing 2 and on the inside of the rib 46. Here, the outer edge of the second collar 36 is axially located between the surface 18 of the piston base 7 and the rib 46 and radially on the inside of the first opening 8.

[0046] The seal 15 is centered on the hollow cylindrical portion 30 and is held on the edge 16 by the first ring 22. Here, the first ring 22 is an axial stop for the seal 15 and one axial direction. The axial direction is aligned with the valve axis 6. Another axial stop is formed by the end face 38 of the valve housing 2. The seal 15 has a circular cross section or an oval cross section in its original state. However, this cross section is shown to be squeezed between the first ring and the end face 38 of the valve housing 2 and out of its original shape. The seal 15 protrudes radially beyond the outer side surface 29 of the valve housing 2.

[0047] In the closed position I, the piston 3 is axially preloaded against the valve seat 17 by the action of the spring 5 and in this position closes the first opening 8 with the piston base 7. The closed position I is therefore the position of the piston base 7 relative to the valve seat 17 in the closed state of the valve 3. The piston 3 rests against the valve seat 17 in a sealing manner.

[0048] Figure 3 In the closed position I of the piston 3, the second opening 10 is mainly closed by the piston housing 9, but a slot-shaped through-opening 12 remains, through which the flow medium can flow. The slot-shaped through-opening 12 is bounded by the housing part of the piston 3 or by the edge of the transition part 11 of the piston 3 and the second opening 10 of the valve housing 2. The other side behind the first opening 8 at the end 32 of the valve 20 with the open cross section 33 is sealed by the piston 3 to the open cross section 33. The annular gap (leakage gap) formed between the piston housing 9 and the valve housing 2 is not taken into account due to the small radial play.

[0049] In the closed position I, an annular channel 13 is formed between the piston 3 and the valve housing 2 and is delimited by the transition section 11 on the piston 3 and a part of the valve housing 2. The annular channel 13 is open only at the groove-shaped through-opening 12 and is otherwise closed all around.

[0050] Figure 3 and Figure 4 The device 37 for regulating the pressure of a flow medium in a vehicle transmission is formed by at least a part of a transmission component 44, a first channel 41, a second channel 42, a pressure compensation valve 1, a seal 15 and a third channel 45 and a device 34 for fixing the pressure compensation valve 1 in the transmission component 44. The pressure compensation valve 1 is seated in a through hole 35, the diameter of which is the same as the diameter of the first channel 41 or is larger or smaller than the diameter of the first channel 41. The valve housing 2 is axially supported on a shoulder 39 in the through hole 35. The first channel 41 opens into the first opening 8. The second opening 10 is aligned with the second channel 42 in such a way that it opens into the second channel 42. The valve 20 is inserted into the through hole 35 of the transmission component 44 via the outer contour 29. The projection 25 radially protrudes beyond the edge 16 and the outer contour 29.

[0051] The means 34 for fixing the pressure compensation valve 1 in the transmission component 44 is formed by the projection 25 of the anti-twist device 24 and by the recess 26 in the transmission component 44. The radial projection 25 of the anti-twist device 24 engages in the recess 26 in the transmission component 44 in a form-fitting manner and forms a form-fitting connection with it. The valve 20 is thus fixed in the transmission component 44 against rotation about the valve axis 6 via the form-fitting connection. In this case, the recess 26 is, for example, a longitudinal groove in the transmission component 44 designed as a housing or a transmission shaft. The positioning via the recess 26 and the projection 25 also forms a means for positioning and position-oriented assembly of the valve 20 in the transmission component 44. This means ensures that the second opening 10 and the second channel 42 are clearly aligned with each other and ensures the connection between the first channel 41 via the valve 20 and the second channel 42 through which the flow medium can flow.

[0052] The seal 15 is radially elastically preloaded against the inside surface 23 of the through-hole 35 and, for this purpose, is radially seated clamped on the hollow cylindrical portion 30 between the edge 16 of the valve 20 and the transmission component 44 .

[0053] Figure 3 Furthermore, the seal 15 is clamped axially between the first flange 22 and the end face 38 .

[0054] Assumptions Figure 1 The pressure compensation valve 1 shown in FIG. 3 is installed in the device 37 to be in the closed position I of the piston 3. In this position, the force exerted on the surface 18 of the piston base in the direction of the arrow by the pressure of the flow medium in the first channel 41 is less than or equal to the reaction force acting on the rear side of the piston base 7 at the inner side 40 of the pressure compensation valve 1. The reaction force is the result of the force generated by the counterpressure inside the pressure compensation valve 1 on the rear side of the piston base 7, and is mainly the spring force of the spring 5 clamped between the piston base 7 and the support element 4, which is exerted on the rear side of the piston base 7.

[0055] When the pressure in the first channel 41 rises to such an extent that the reaction force generated on the surface 18 of the piston base 7 is exceeded, the piston 3 moves axially in the direction of the support element 4 and releases the valve seat 17. The flow medium thus flows through the passage arranged on the inside through the annular channel 13 of the pressure compensation valve 1 via the first opening 8, which passage thus expands into the second channel 42 via the second opening 10. In this case, the piston 3 also seals the rear side of the pressure compensation valve 1 at the open cross section 33 of the pressure compensation valve 1 towards the end 32 and therefore also towards the third channel 45, under the influence of the leakage gap determined by the radial play. Any leakage gap between the valve housing 2 and the inner surface 23 is sealed by means of the seal 15.

[0056] Description of Reference Numerals

[0057] 1 Pressure compensation valve

[0058] 2 valve housing

[0059] 3 Piston

[0060] 4 Support elements

[0061] 5 Spring

[0062] 6 Valve axis

[0063] 7 Piston base

[0064] 8 First Opening

[0065] 9 Piston housing

[0066] 10 Second Opening

[0067] 11 Transition

[0068] 12 Slot-shaped through opening

[0069] 13. Ring Channel

[0070] 14 rings

[0071] 15 Seals

[0072] 16 Edge

[0073] 17 Valve seat

[0074] 18 Surface of piston base

[0075] 19 Base of the ring

[0076] 20 valve

[0077] 21 Circumferential groove

[0078] 22 First Ring

[0079] 23 Inner surface

[0080] 24 Anti-twist device

[0081] 25 Protrusion

[0082] 26 Recesses in transmission components

[0083] 28 Protrusion of the supporting element

[0084] 29 Outer contour of valve housing

[0085] 30 Hollow cylindrical part

[0086] 31 Base body of the supporting element

[0087] 32 Valve end

[0088] 33 Open cross section of valve

[0089] 34 Device for fixing

[0090] 35 Through Hole

[0091] 36 Second Ring

[0092] 37 Devices

[0093] 38 End face of valve housing

[0094] 39 Shoulder

[0095] 40 Inside of valve

[0096] 41 First Channel

[0097] 42 Second Channel

[0098] 44 Transmission parts

[0099] 45 Third Channel

[0100] 46 Ribs on valve housing

Claims

1. A valve (20) comprising a valve housing (2), at least one piston (3) and at least one spring (5), the valve being inserted into a through hole (35) of a component (44), the valve having the following characteristics: The piston (3) and the valve housing (2) are arranged coaxially relative to one another on an imaginary valve axis (6), wherein: The valve axis (6) is axially oriented in a first axial direction and in a second axial direction opposite to the first axial direction, - the piston (3) is received in the valve housing (2) in an axially movable manner against the spring force of the spring (5), and a first opening (8) of the valve housing (2) through which the flow medium can pass, which faces axially toward the piston (7) and can be closed by the piston (3), the first opening (8) opening into a first channel (41) of the component, characterised in that at least one ring (14) around the valve axis (6) is fixed to the first opening (8), wherein at least one seal (15) is held on the valve housing (2) by means of the ring (14), An annular base body (19) of the ring (14) is axially engaged in the first opening (8), a first ring ring (22) and a second ring ring (36) being formed on the base body (19), wherein the first ring ring (22) and the second ring ring (36) are oriented radially outwardly away from the valve axis (6), A second opening (10) through which the flow medium can pass is formed in the valve housing (2, 18), the second opening (10) being oriented transversely to the first opening (8), the second opening (10) opening into a second channel (42) of the component, The first ring (22) is provided with a projection (25), which at least partially radially projects beyond the outer contour (29) of the valve housing (2), and the projection (25) is configured to engage in a recess (26) formed in the component (44) in a form-fitting manner to ensure that the second opening (10) and the second channel (42) are aligned to ensure a connection between the first channel (41) via the valve (20) and the second channel (42) through which a flow medium can flow.

2. The valve according to claim 1, characterized in that The sealing element (15) comprises an elastomer.

3. The valve according to claim 1, characterized in that The ring (14) engages axially behind the edge (16) of the first opening (8) at at least one point with a collar (22, 36), wherein the seal (15) is centered on the edge (16) relative to the valve axis and is held on the valve housing (2) via the collar (22).

4. The valve according to claim 3, characterized in that The first ring (22) is axially engaged behind the rim (16) and the seal on the outside of the valve (20), and wherein the second ring (36) is axially engaged behind the rim (16) on the inside of the valve (20).

5. The valve according to claim 1 or 3, characterized in that: The ring (14) is formed from a sheet metal material.

6. The valve according to claim 1 or 2, characterized in that: The second opening (10) can be at least partially closed by the piston (3), the valve axis (6) extends through the first opening (8) in an axial direction, wherein the second opening (10) is radially spaced apart from the valve axis (6), and the projection (25) radially projects beyond the valve housing (2), wherein the projection is radially oriented transversely to the valve axis (6).

7. A device (37) for regulating the pressure of a flow medium in a vehicle transmission, wherein: The device is formed by a part of a transmission component (44), at least a first channel (41) and a second channel (42), a valve (20) according to any of the preceding claims, and a device (34) for fixing the valve (20) in the transmission component, wherein the valve is inserted into a through hole (35) of the transmission component (44), the first channel (41) in the part of the transmission component (44) leads to the first opening (8), and the second opening (10) opens to the second channel (42), characterized in that the seal (15) is clamped radially in the through hole (35) between the part of the valve (20) and the transmission component (44).

8. A device for fixing a pressure compensation valve (1) of a device according to claim 7 in a transmission component (44), characterized in that: The device (34) is formed by the projection (25) and the recess (26), wherein the projection (25) is fixed to the ring (14) and engages in a positively locking manner in the recess (26) formed in the transmission component (44), and the seal (15) is retained on the pressure compensation valve (1) in a positively locking manner by means of the ring (14) at least in an axial direction aligned with the valve axis (6).

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