Piston oil seal and hydraulic clutch with same

Abstract

According to the piston oil seal, a power input shaft penetrates through the piston oil seal, the piston oil seal is located between a clutch shell and a clutch plate set, and the piston oil seal pushes and presses the clutch plate set under the action of a first direction force. And the clutch plate group is relatively separated from the clutch plate group under the action of a second direction force. The piston oil seal is provided with a positioning structure, and the positioning structure can be configured with an alignment structure of at least one of the clutch shell and the clutch plate group, so that the piston oil seal cannot idle relative to the adjacent clutch shell or clutch plate group. Therefore, a maintainer can quickly complete the reloading operation of the parts, so that the maintenance efficiency is improved.

Description

Technical Field

[0001] The utility model relates to an oil seal structure and application thereof, in particular to a piston oil seal and a hydraulic clutch with the piston oil seal. Background Art

[0002] It is known that oil seals are often used on rotating shafts of mechanical equipment to prevent the fluid used for lubrication in the mechanical equipment from overflowing and to prevent external impurities (such as sewage, dust, etc.) from improperly entering the mechanical equipment. In response to the requirements of the use environment, oil seals are designed in various specifications and shapes. Choosing and using appropriate and correct oil seals can effectively extend the service life of mechanical equipment.

[0003] In the clutch of the vehicle's gearbox, there is a piston oil seal, which is sleeved on a power input shaft and located between a clutch housing and a clutch pack. The piston oil seal is used to push the clutch pack at an appropriate time to achieve the purpose of gear shifting. However, the piston oil seal often slips relative to the clutch housing, which may reduce the service life of the piston oil seal. Secondly, the manufacturer of the piston oil seal often produces multiple oil seals with slight structural differences at the same time to meet the needs of the oil seal application environment. However, this situation often causes maintenance personnel to have to try multiple times to select a suitable oil seal when replacing parts, which increases the maintenance operation time. Utility Model Content

[0004] In view of this, the inventor of this case has carefully considered and accumulated many years of experience in the development and manufacture of sealing components, and finally produced the present utility model. The purpose of the present utility model is to provide a piston oil seal that can be applied to the actual needs of different use environments to improve the efficiency of component replacement.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a piston oil seal, which is a power input shaft passing through and is located between a clutch housing and a clutch plate group. The piston oil seal includes a ring frame, the ring frame has a face and a ring side, wherein the face has a through hole, the power input shaft passes through the through hole, at least one of the face and the ring side has a positioning structure, and at least one of the clutch housing and the clutch plate group has an alignment structure. The positioning structure and the alignment structure are configured so that the piston oil seal will not idle relative to the adjacent clutch housing or the clutch plate group.

[0006] In addition, the utility model further provides a hydraulic clutch, which includes a clutch housing, a clutch plate group and a piston oil seal. The clutch housing includes a tube, an extension and a cover, wherein the power input shaft passes through the tube, the extension is connected to the tube and extends radially, and the cover is connected to the extension and extends axially; the clutch plate group is sleeved on the power input shaft and located in the cover of the clutch housing; the piston oil seal is sleeved on the power input shaft and located between the clutch housing and the clutch plate group, and the piston oil seal can move between a first position and a second position along the axial direction and will not idle relative to adjacent components; wherein the piston oil seal is moved to the first position and pushes the clutch plate group under the action of a first directional force, and the piston oil seal is moved to the second position under the action of a second directional force, wherein the first directional force and the second directional force are opposite forces.

[0007] In one embodiment, the positioning structure of the ring frame includes at least one positioning hole, and the at least one positioning hole is located on the face; the clutch housing has at least one positioning pin, and the at least one positioning pin constitutes the alignment structure and passes through the at least one positioning hole.

[0008] In one embodiment, the positioning structure of the ring frame includes at least one notch, and the at least one notch is located at the periphery of the side of the ring; the clutch plate group has at least one steel plate, and the at least one steel plate has at least one bent plate, and the at least one bent plate constitutes the alignment structure and is embedded in the at least one notch.

[0009] In one embodiment, the ring frame has a plurality of oil leakage holes, and the plurality of oil leakage holes penetrate the ring side portion and are arranged in a spiral shape along the circumference of the ring side portion.

[0010] In one embodiment, the piston oil seal includes an inner diameter sealing lip and an outer diameter sealing lip, the inner diameter sealing lip is arranged along the edge of the perforation of the ring frame, and the outer diameter sealing lip is arranged on a wave fold on the face, the wave fold surrounds the perforation and bulges outward.

[0011] In one embodiment, the surface of the ring frame has an anti-rust film, and the heat-resistant temperature of the anti-rust film is between 130 degrees Celsius and 210 degrees Celsius.

[0012] In one embodiment, the hydraulic clutch includes a reset unit disposed between the clutch plate set and the piston oil seal, and the reset unit provides the second directional force.

[0013] The utility model can cooperate with the alignment structure arranged on the clutch housing or the clutch plate group through the positioning structure on the piston oil seal, so that maintenance personnel can quickly complete the replacement operation of components to improve maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A three-dimensional diagram of a hydraulic clutch according to a preferred embodiment of the utility model;

[0015] Figure 2 for Figure 1 A cross-sectional view of the hydraulic clutch shown;

[0016] Figure 3 for Figure 1 An exploded view of the hydraulic clutch shown;

[0017] Figure 4 for Figure 3 A perspective view of the hydraulic clutch from another perspective;

[0018] Figure 5 for Figure 1 A three-dimensional view of a piston oil seal in a hydraulic clutch shown in FIG.

[0019] Figure 6 for Figure 5 The cross-section and enlarged view of the piston oil seal shown;

[0020] Figure 7 for Figure 2 An enlarged view of the hydraulic clutch is shown, revealing that the piston oil seal is in a second position;

[0021] Figure 8 Similar Figure 7 , revealing that the piston oil seal is located in a first position;

[0022] Fig. 9 for Figure 1 A partially exploded view of the hydraulic clutch is shown.

[0023]

Explanation of symbols

[0024] 100: Hydraulic clutch

[0025] 10: Piston oil seal

[0026] 12: Ring frame

[0027] 121: Face

[0028] 121a: Perforation

[0029] 121b: Wave folds

[0030] 121c: Positioning hole

[0031] 122: Ring side

[0032] 122a: Free end edge

[0033] 122b: Oil drain hole

[0034] 122c: Gap

[0035] 123: Anti-rust film

[0036] 14: Inner diameter sealing lip

[0037] 16: Outer diameter sealing lip

[0038] 20: Clutch housing

[0039] 22: Management Department

[0040] 22a: Inner pipe section

[0041] 22b: Outer pipe section

[0042] 22c: Oil circuit

[0043] 24: Extension

[0044] 24a: retaining ring

[0045] 26: Masking

[0046] 26a: Expansion section

[0047] 28: Positioning pin

[0048] 30: Clutch plate set

[0049] 32: Steel sheet

[0050] 32a: Bending sheet

[0051] 34: Friction plate

[0052] 40: Reset unit

[0053] 42:Fixed plate

[0054] 44:Active board

[0055] 46: Spring

[0056] 200: Power input shaft

[0057] P1: First position

[0058] P2: Second position

[0059] S: Hydraulic chamber DETAILED DESCRIPTION

[0060] In order to more clearly illustrate the present invention, a preferred embodiment is given and described in detail with the accompanying drawings. Figure 1 and Figure 2As shown, a hydraulic clutch 100 including a piston oil seal 10 of a preferred embodiment of the utility model is shown. The hydraulic clutch 100 is a part of a gearbox of a vehicle and a power input shaft 200 passes through it. Figure 3 and Figure 4 As shown, the hydraulic clutch 100 includes not only the aforementioned piston oil seal 10, but also a clutch housing 20, a clutch plate assembly 30 and a reset unit 40. The detailed structures and related positions of the aforementioned components are described below. For ease of description, they are not described in the order of installation.

[0061] First, the clutch housing 20 includes a tube 22, an extension 24 and a shield 26. The power input shaft 200 passes through the tube 22, the extension 24 is connected to the outer circumference of the tube 22 and extends radially. The tube 22 is defined as an inner tube section 22a and an outer tube section 22b with the part connected to the extension 24 as the boundary. The shield 26 is connected to the extension 24 and extends axially and has an outer expansion section 26a. Overall, the clutch housing 20 looks like a cover. In addition, the clutch housing 20 also has a retaining ring 24a protruding from the inner wall of the extension 24 along the axial direction, and an oil passage 22c is provided to connect the inner circumference and the outer circumference of the tube 22.

[0062] The clutch plate group 30 is sleeved on the power input shaft 200 and installed inside the clutch housing 20 and located in the outer expansion section 26a of the cover portion 26. The clutch plate group 30 is composed of a plurality of disc-shaped sheets, more specifically, a plurality of steel plates 32 and a plurality of friction plates 34 are alternately stacked. The function of the clutch plate group 30 is that when adjacent sheets are subjected to pressure and are in close contact with each other and sufficient friction is formed, the power input shaft 200 can drive a gear box (not shown) to rotate synchronously through the clutch housing 20, and when the pressure is released, that is, there is no close contact friction between the adjacent sheets, the power input shaft 200 will continue to rotate but will not drive the clutch housing 20 to rotate. The actuation mode of the clutch plate group 30 is used to achieve the purpose of shifting gears.

[0063] The piston oil seal 10 is sleeved on the power input shaft 20 and is located inside the clutch housing 20 in a manner that does not idle relative to adjacent components. Figure 5 and Figure 6As shown, the piston oil seal 10 includes a ring frame 12, an inner diameter sealing lip 14 and an outer diameter sealing lip 16. The ring frame 12 is made of metal iron and has good anti-deformation ability. The ring frame 12 has a face 121 and a ring side 122. The face 121 has a through hole 121a and a wave fold 121b surrounding the through hole 121a and bulging outwards; the ring side 122 is connected to the face 121 and has a free end edge 122a. In addition, the ring side 122 also has a plurality of oil drain holes 122b, which penetrate the ring side 122 and are arranged in a spiral shape along the circumference of the ring side 122.

[0064] In this embodiment, the surface of the ring frame 12 also has an anti-rust film 123, and the heat resistance temperature of the anti-rust film 123 is between 130 degrees Celsius and 210 degrees Celsius. In one embodiment, the material of the anti-rust film 123 is selected from one of the silane resins and phenolic resins with bonding effect or a mixed resin thereof, wherein the bonding heat resistance temperature of the silane resin is between 180 degrees Celsius and 200 degrees Celsius, the bonding heat resistance temperature of the phenolic resin is between 140 degrees Celsius and 160 degrees Celsius, and the bonding heat resistance temperature of the resin mixed with the silane resin and the phenolic resin is between 160 degrees Celsius and 180 degrees Celsius. The formation method of the aforementioned anti-rust film 123 can be obtained by soaking in an adhesive or by coating, and the anti-rust film 123 is preferably completely attached to the inner and outer surfaces of the ring frame 12, so as to enhance the anti-rust effect of the ring frame 12.

[0065] The inner diameter sealing lip 14 and the outer diameter sealing lip 16 of the piston oil seal 10 are made of rubber material. Although they are made of materials with different properties from the ring frame 12, the anti-rust film 123 attached to the surface of the ring frame 12 serves as a medium, so that the inner diameter sealing lip 14 can be set along the edge of the through hole 121a of the ring frame 12, and the outer diameter sealing lip 16 can be fixed on the wavy folds 121b of the face 121 without being easily peeled off.

[0066] like Figure 7 As shown, the piston oil seal 10 is sleeved with the inner tube section 22a of the tube section 22 of the clutch housing 20 by its through hole 121a, and the wave fold 121b is just embedded in the retaining ring 24a. At the same time, the lip edge of the inner diameter sealing lip 14 contacts the outer wall surface of the inner tube section 22a of the clutch housing 20, and the outer diameter sealing lip 16 contacts the extension portion 24 of the clutch housing 20 and the inner wall surface of the retaining ring 24a. Herein, the face portion 121 and the extension portion 24 are located between the inner diameter sealing lip 14 and the outer diameter sealing lip 16, and together with the inner diameter sealing lip 14 and the outer diameter sealing lip 16, form a hydraulic chamber S ( Figure 8Reference). One end of the oil circuit 22c of the clutch housing 20 is connected to the hydraulic chamber S, and the other end of the oil circuit 22c is connected to a hydraulic source (not shown) through a preset oil circuit of the power input shaft 200. When the fluid of the hydraulic source enters the hydraulic chamber S, the hydraulic pressure formed will push the piston oil seal 10 to move along the axial direction. The force formed by the hydraulic pressure is the first directional force defined in the present utility model, such as Figure 8 As shown, when the free end edge 122a of the piston seal 10 pushes the clutch plate set 30 and achieves gear shifting, the piston seal 10 is located at a first position P1. It is worth mentioning that the design of the wave folds 121b of the piston seal 10 is conducive to the rapid establishment of hydraulic pressure.

[0067] The reset unit 40 is disposed between the clutch plate set 30 and the piston oil seal 10 to provide the piston oil seal 10 with a second directional force opposite to the first directional force, so as to push the piston oil seal 10 to move axially to a position such as Figure 7 The second position P2 shown in FIG. 2 causes the fluid in the hydraulic chamber S to be squeezed outward along the oil path 22c, that is, the clutch plate group 30 is relieved of pressure. In this embodiment, the reset unit 40 includes a fixed plate 42 and a movable plate 44 of a disc-shaped sheet material, and a plurality of springs 46 are arranged between the fixed plate 42 and the movable plate 44, wherein the fixed plate 42 is embedded in the inner tube section 22a of the clutch housing 20 by its inner edge to form a stable supporting portion, so that the springs 46 can push the movable plate 44 to maintain the inner wall of the face 121 of the piston oil seal 10, and the elastic force of the spring 46 is the second direction force.

[0068] The above is an explanation of the hydraulic clutch 100 of a preferred embodiment of the utility model. It can be known from the above explanation that the piston oil seal 10 is located between the clutch housing 20 and the clutch plate group 30. Based on the aforementioned structural relationship, the utility model is provided with a positioning structure on the piston oil seal 10, which cooperates with the alignment structure arranged on the clutch housing 20 or the clutch plate group 30, so as to achieve the purpose that the piston oil seal 10 does not idle relative to the adjacent parts. The aforementioned adjacent parts can be the clutch housing 20 or the clutch plate group 30.

[0069] First, the method for achieving that the piston oil seal 10 does not idle relative to the clutch housing 20 is described below. Figures 1 to 8 In the illustrated embodiment, the positioning structure includes three positioning holes 121c located on the face 121 of the piston oil seal 10, and the alignment structure includes three positioning pins 28 fixed to the inner wall of the extension portion 24 of the clutch housing 20. These positioning pins 28 pass through the corresponding positioning holes 121c ( Figure 7), so that the piston oil seal 10 cannot idle relative to the adjacent clutch housing 20, but can still move axially between the first position P1 and the second position P2. Since the piston oil seal 10 will not slip and idle relative to the clutch housing 20, the airtightness of the hydraulic chamber S can be ensured, and the service life of the piston oil seal 10 can be extended.

[0070] In order to prevent the piston seal 10 from idling relative to the clutch plate assembly 30, the positioning structure further includes three notches 122c located at the periphery of the ring side portion 122 of the piston seal 10, and the alignment structure is composed of three bent pieces 32a arranged on the steel sheet 32 ​​close to the piston seal 10, such as Fig. 9 As shown, these bent pieces 32a are respectively embedded in the corresponding notches 122c, so that the piston oil seal 10 will not idle relative to the clutch plate assembly 30. At the same time, the piston oil seal 10 also forms a contact resistance by the inner diameter sealing lip 14 and the outer diameter sealing lip 16 against the clutch housing 20, so that the piston oil seal 10 is not easy to slip relative to the clutch housing 20, and the airtightness of the hydraulic chamber S can be effectively ensured.

[0071] It can be known from the above description that the positioning structure can be composed of three positioning holes 121c or three notches 122c, and of course, it can also be composed of three positioning holes 121c and three notches 122c at the same time. The alignment structure that matches the aforementioned positioning hole 121c is the positioning pin 28 fixed to the clutch housing 20, and the alignment structure that matches the aforementioned notch 122c is the bent sheet 32a located on the steel sheet 32. The utility model can cooperate with the alignment structure set on the clutch housing 20 and / or the clutch plate group 30 through the positioning structure on the piston oil seal 10, so that maintenance personnel can quickly complete the replacement of components. For example, when the clutch housing 20 in the hydraulic clutch is provided with a positioning pin 28, and the steel sheet 32 ​​of the clutch plate group 30 also has a bent sheet 32a, or the clutch housing 20 has no positioning pin 28 and the steel sheet 32 ​​of the clutch plate group 30 has a bent sheet 32a, or the clutch housing 20 is provided with a positioning pin 28, but the steel sheet 32 ​​of the clutch plate group 30 does not have a bent sheet 32a, the positioning structure on the piston oil seal 10 of the utility model can be applied to the use requirements of the aforementioned different use environments, that is, maintenance personnel do not need to try multiple piston oil seals with slight structural differences before selecting a suitable piston oil seal. Therefore, the structural design of the piston oil seal of the utility model can improve the efficiency of component replacement.

[0072] The number of the positioning holes 121c and the positioning pins 28 mentioned above is arranged in a ratio of three to three, and the number of the notches 122c and the bending pieces 32a is also arranged in a ratio of three to three. However, in practice, the number of the positioning holes 121c and the positioning pins 28, the notches 122c and the bending pieces 32a is not limited to an equal number correspondence. Any one-to-one, one-to-many, or many-to-one arrangement can also achieve the purpose of preventing the piston oil seal from idling relative to adjacent components.

[0073] In addition, it is to be noted that when the hydraulic clutch 100 is in use, about one-third of its portion is immersed in hydraulic oil. When the piston oil seal 10 rotates together with the clutch housing 20, the inner wall of the rolling piston oil seal 10 is easily heated by friction with the hydraulic oil. For this reason, the oil drain holes 122b of the piston oil seal 10 of this embodiment are arranged in a spiral shape along the circumference of the ring side portion 122, which can facilitate the hydraulic oil to be thrown out from each of the oil drain holes 122b to reduce the oil temperature.

[0074] The above description is only the preferred embodiment of the present utility model. Any equivalent changes made by applying the present utility model specification and the scope of patent application should be included in the patent scope of the present utility model.

Claims

1. A piston oil seal for a clutch, through which a power input shaft passes and between a clutch housing and a clutch plate group, characterized in that: The piston oil seal includes a ring frame, which has a face and a ring side, wherein the face has a through hole, and the power input shaft passes through the through hole, and at least one of the face and the ring side has a positioning structure, and at least one of the clutch housing and the clutch plate group has an alignment structure. The positioning structure and the alignment structure are configured so that the piston oil seal will not idle relative to the adjacent clutch housing or the clutch plate group.

2. The piston oil seal for a clutch according to claim 1, characterized in that: The positioning structure of the ring frame includes at least one positioning hole, and the at least one positioning hole is located on the face; the clutch housing has at least one positioning pin, and the at least one positioning pin constitutes the alignment structure and passes through the at least one positioning hole.

3. The piston oil seal for a clutch according to claim 1, characterized in that: The positioning structure of the ring frame includes at least one notch, and the at least one notch is located at the periphery of the ring side; the clutch plate group has at least one steel plate, and the at least one steel plate has at least one bent plate, and the at least one bent plate constitutes the alignment structure and is embedded in the at least one notch.

4. The piston oil seal for a clutch according to claim 1, characterized in that: The ring frame has a plurality of oil leakage holes, which penetrate the ring side portion and are arranged in a spiral shape along the circumference of the ring side portion.

5. The piston oil seal for a clutch according to claim 1, characterized in that: The piston oil seal includes an inner diameter sealing lip and an outer diameter sealing lip. The inner diameter sealing lip is arranged along the edge of the through hole of the ring frame, and the outer diameter sealing lip is arranged on a wave fold on the face. The wave fold surrounds the through hole and bulges outward.

6. The piston oil seal for a clutch according to claim 1, characterized in that: The surface of the ring frame has an anti-rust film, and the heat-resistant temperature of the anti-rust film is between 130 degrees Celsius and 210 degrees Celsius.

7. A hydraulic clutch, through which a power input shaft passes, characterized in that: Include: A clutch housing, comprising a tube portion, an extension portion and a cover portion, wherein the power input shaft passes through the tube portion, the extension portion is connected to the tube portion and extends radially, and the cover portion is connected to the extension portion and extends along the axial direction; A clutch plate set is sleeved on the power input shaft and located in the shield portion of the clutch housing; A piston oil seal is sleeved on the power input shaft and located between the clutch housing and the clutch plate group. The piston oil seal can move axially between a first position and a second position and will not idle relative to adjacent components; wherein the piston oil seal is moved to the first position and pushes the clutch plate group under the action of a first directional force, and the piston oil seal is moved to the second position under the action of a second directional force, wherein the first directional force and the second directional force are opposite forces.

8. The hydraulic clutch according to claim 7, characterized in that: The piston oil seal includes a ring frame, the ring frame has a face and a ring side, the face has a through hole, the power input shaft passes through the through hole, and at least one of the face and the ring side has a positioning structure; at least one of the clutch housing and the clutch plate group has an alignment structure, the positioning structure and the alignment structure are configured so that the piston oil seal will not idle relative to the adjacent clutch housing or the clutch plate group.

9. The hydraulic clutch according to claim 8, characterized in that: The positioning structure of the ring frame includes at least one positioning hole, and the at least one positioning hole is located on the face; the clutch housing has at least one positioning pin, and the at least one positioning pin constitutes the alignment structure and passes through the at least one positioning hole.

10. The hydraulic clutch according to claim 8, characterized in that: The positioning structure of the ring frame includes at least one notch, and the at least one notch is located at the periphery of the ring side; the clutch plate group has at least one steel plate, and the at least one steel plate has at least one bent plate, and the at least one bent plate constitutes the alignment structure and is embedded in the at least one notch.

11. The hydraulic clutch according to claim 8, characterized in that: The ring frame has a plurality of oil leakage holes, which penetrate the ring side portion and are arranged in a spiral shape along the circumference of the ring side portion.

12. The hydraulic clutch according to claim 8, characterized in that: The piston oil seal includes an inner diameter sealing lip and an outer diameter sealing lip, wherein the inner diameter sealing lip is arranged along the edge of the perforation of the ring frame, and the outer diameter sealing lip is arranged on a wave fold on the face portion, and the wave fold surrounds the perforation and bulges outward; wherein the inner diameter sealing lip contacts the outer wall surface of the tube portion of the clutch housing, and the outer diameter sealing lip contacts the inner wall surface of the extension portion of the clutch housing, and a hydraulic chamber is formed between the inner diameter sealing lip and the outer diameter sealing lip, and the tube portion of the clutch housing has an oil circuit, one end of the oil circuit is connected to the hydraulic chamber, and the other end of the oil circuit is connected to a hydraulic source.

13. The hydraulic clutch according to claim 8, characterized in that: The surface of the ring frame has an anti-rust film, and the heat-resistant temperature of the anti-rust film is between 130 degrees Celsius and 210 degrees Celsius.

14. The hydraulic clutch according to claim 7, characterized in that: A reset unit is included and is arranged between the clutch plate group and the piston oil seal. The reset unit provides the second directional force.

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