Torque transmission device and vehicle transmission system

Abstract

The invention relates to a torque transmission device and a vehicle transmission system. The torque transmission device includes: a flywheel body; the hub and the flywheel body can rotate relative to each other and are coaxially arranged, and a friction ring is arranged on the side, facing the flywheel body, of the hub; the first sealing spring piece is arranged between the friction ring and the flywheel main body; the second sealing spring piece is arranged between the hub and the flywheel main body; the cover disc is arranged on the side, facing the hub, of the flywheel body. And the sealing ring is arranged between the cover disc and the hub. The hub and the flywheel body keep clamping force on the first sealing spring piece and the second sealing spring piece, and the cover disc and the hub keep clamping force on the sealing ring in the axial direction, so that sealing is formed. And by arranging the second sealing spring piece, the sealing performance can be improved, and then a better waterproof effect can be provided.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle transmission, and in particular to a torque transmission device and a vehicle transmission system. Background Art

[0002] With the development of automobile technology and the popularization of users, automobiles play an increasingly important role in people's daily lives, which has prompted people to have higher and higher requirements for various performances of automobiles. In particular, the requirements for waterproofing of various parts of vehicles have been greatly improved.

[0003] The current vehicle transmission system is equipped with a torque transfer device, such as a shock absorber, to reduce the torsional vibration from the engine to the gearbox. There is a gap between the flywheel body and the wheel hub of the shock absorber. In order to prevent external water from entering the interior of the shock absorber through the gap between the flywheel body and the wheel hub, a seal is provided in the gap between the flywheel body and the wheel hub in the shock absorber of the current design. However, since the seal and the flywheel body are both made of metal materials, and the contact between the two is line contact, the sealing effect is not good, and external water can easily enter the interior of the shock absorber through the gap between the seal and other components, thereby affecting the working performance of the shock absorber. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a torque transmission device and a vehicle transmission system.

[0005] The torque transmission device provided by the embodiment of the present invention comprises: a flywheel body; a wheel hub, which is relatively rotatable and coaxially arranged with the flywheel body, wherein a friction ring is arranged on the side of the wheel hub facing the flywheel body; a first sealing spring sheet, which is arranged between the friction ring and the flywheel body; a second sealing spring sheet, which is arranged between the wheel hub and the flywheel body; a cover plate, which is arranged on the side of the flywheel body facing the wheel hub; and a sealing ring, which is arranged between the cover plate and the wheel hub. The wheel hub and the flywheel body maintain a clamping force on the first sealing spring sheet and the second sealing spring sheet, and the cover plate and the wheel hub maintain a clamping force on the sealing ring in the axial direction to form a seal.

[0006] According to some embodiments of the present invention, a second sealing spring sheet contact portion parallel to the surface of the flywheel body is provided at one end of the second sealing spring sheet facing the flywheel body, and the second sealing spring sheet contact portion is in surface contact with the flywheel body.

[0007] According to some embodiments of the present invention, the cover plate includes: a cover plate main body, which is arranged on the flywheel body; a cover plate bending portion, which is bent and extended toward the wheel hub; and a cover plate contact end, which is bent and extended from the cover plate bending portion in a direction parallel to the wheel hub.

[0008] According to some embodiments of the present invention, a cover plate sealing groove is formed in the bent portion of the cover plate, and a sealing ring protrusion is provided at one end of the sealing ring, and the sealing ring protrusion is pressed into the cover plate sealing groove.

[0009] According to some embodiments of the present invention, an elastically deformable sealing ring clamping portion is provided at the other end of the sealing ring away from the sealing ring protrusion, and the sealing ring is pressed between the cover plate and the wheel hub and clamped with the contact end of the cover plate through the sealing ring clamping portion.

[0010] According to some embodiments of the present invention, a sealing annular variable groove is formed in a bent area between the sealing ring clamping portion and the sealing ring main body, so that the sealing ring clamping portion can be elastically deformed.

[0011] According to some embodiments of the present invention, the sealing ring is made of plastic material.

[0012] According to some embodiments of the present invention, the first sealing spring sheet is made of metal material.

[0013] According to some embodiments of the present invention, the friction ring includes a friction ring radial portion extending in a radial direction, and a friction ring axial portion extending in an axial direction toward the flywheel body.

[0014] An embodiment of the present invention also provides a vehicle transmission system, comprising a torque transfer device, an engine and a gearbox according to any one of the above embodiments; one axial end of the torque transfer device is connected to the engine, and the other axial end of the torque transfer device is connected to the gearbox.

[0015] In the field of vehicle transmission technology, the present invention provides a torque transmission device and a vehicle transmission system, wherein the second sealing spring sheet is arranged between the wheel hub and the flywheel body, so that the sealing performance and waterproof performance between the wheel hub and the flywheel body can be further improved. In addition, a second sealing spring sheet contact portion parallel to the surface of the flywheel body is arranged at one end of the second sealing spring sheet facing the flywheel body, so that the second sealing spring sheet contact portion forms a surface contact with the flywheel body, thereby making the contact between the second sealing spring sheet and the flywheel body closer, further improving the sealing performance and waterproof performance. In addition, the torque transmission device also includes a cover plate and a sealing ring, wherein the sealing ring is arranged between the cover plate and the wheel hub, and can also seal other openings of the torque transmission device. Among them, the cover plate bending portion is provided with a cover plate sealing groove, and one end of the sealing ring is provided with a sealing ring protrusion, and the sealing ring protrusion is pressed into the cover plate sealing groove, which can further seal the torque transmission device and prevent water from the outside from entering the interior of the torque transmission device, thereby improving the waterproof performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0017] Figure 1 A schematic diagram of a vehicle transmission system according to an embodiment of the present invention is shown;

[0018] Figure 2 A partial cross-sectional view of a torque transmission device according to an embodiment of the present invention is shown;

[0019] Figure 3 Shows Figure 2 An enlarged schematic diagram of area a in the middle; and

[0020] Figure 4 Shows Figure 2 A magnified schematic diagram of area b.

[0021] It should be understood that the above drawings are merely schematic and are not drawn according to actual scale. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0023] Unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "include" or "comprises" and the like used in the embodiments of the present invention mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Up", "down", etc. are only used with respect to the orientation of the components in the drawings. These directional terms are relative concepts. They are used for description and clarification with respect to the components, and they may change accordingly according to the change of the orientation of the components in the drawings.

[0024] The purpose of the present invention is to improve a torque transmission device, especially a torque transmission device used in a vehicle transmission system, so that the contact between the seal and other components of the torque transmission device is surface contact, so as to provide a better waterproof effect. The torque transmission device in the present invention can be, but is not limited to, a shock absorber, and can also be applied to other structures for torque transmission.

[0025] Figure 1 A schematic diagram of a vehicle transmission system according to an embodiment of the present invention is shown. Figure 2 FIG. 2 shows a partial cross-sectional view of a torque transmission device according to an embodiment of the present invention. In some embodiments, the torque transmission device may be a shock absorber applied to a vehicle transmission system. Figure 1-2 As shown, the vehicle transmission system includes a torque transmission device 1, an engine 2 and a gearbox 3. One axial end of the torque transmission device 1 is connected to the engine 2, and the other axial end of the torque transmission device 1 is connected to the gearbox 3.

[0026] Specifically, the torque transmission device 1 includes a flywheel body 11 and a wheel hub 12, and the flywheel body 11 and the wheel hub 12 are substantially coaxially arranged. The flywheel body 11 and the wheel hub 12 can be made of a metal material with a certain rigidity. The flywheel body 11 includes a first flywheel housing 11a and a second flywheel housing 11b arranged along an axial direction A. Figure 2As shown, in the axial direction A, one side of the flywheel body 11 in the figure is the first flywheel housing 11a, and the other side is the second flywheel housing 11b. The first flywheel housing 11a and the second flywheel housing 11b are coaxially covered to form a flywheel body 11 with a cavity structure. An elastic damping element 18 is provided in the cavity of the flywheel body 11, and the flywheel body 11 can transmit the torque to the wheel hub 12 through the elastic damping element 18, and finally transmit the torque of the engine 2 to the gearbox 3.

[0027] Furthermore, the hub 12 is coaxially arranged with the flywheel body 11 and can rotate relative to it. Figure 1-2 As shown, the wheel hub 12 is connected to the first flywheel housing 11a through a sealing spring sheet so as to be relatively rotatable; the second flywheel housing 11b is connected to the engine 2 in cooperation with the wheel hub 12 and the gearbox 3 in cooperation with the engine 2. In the working state, the engine 2 drives the flywheel body 11 to rotate, and the torque is transmitted between the flywheel body 11 and the wheel hub 12 through the elastic vibration-damping element 18. The rotation of the wheel hub 12 and the rotation of the flywheel body 11 gradually change from relative rotation to synchronous rotation, so as to transmit the torque of the engine 2 to the gearbox 3.

[0028] In some optional embodiments, such as Figure 1-2 As shown, the torque transmission device 1 comprises: a flywheel body 11, a wheel hub 12, a first sealing spring sheet 13, a second sealing spring sheet 15, a cover plate 16 and a sealing ring 17. The wheel hub 12 and the flywheel body 11 are relatively rotatable and coaxially arranged, and a friction ring 14 is arranged on the side of the wheel hub 12 facing the flywheel body 11. The first sealing spring sheet 13 is arranged between the friction ring 14 and the flywheel body 11. The second sealing spring sheet 15 is arranged between the wheel hub 12 and the flywheel body 11. The cover plate 16 is arranged on the side of the flywheel body 11 facing the wheel hub 12; and the sealing ring 17 is arranged between the cover plate 16 and the wheel hub 12. The wheel hub 12 and the flywheel body 11 maintain a clamping force on the first sealing spring sheet 13 and the second sealing spring sheet 15, and the cover plate 16 and the wheel hub 12 maintain a clamping force on the sealing ring 17 in the axial direction A to form a seal.

[0029] Figure 3 Shows Figure 2 A magnified schematic diagram of the region a in the middle. Figure 2-3As shown, in some embodiments, the first flywheel housing 11a of the flywheel body 11 partially overlaps with the wheel hub 12 in the axial direction A. An annular slit space is formed between the first flywheel housing 11a and the wheel hub 12. The friction ring 14 can be arranged on the portion of the wheel hub 12 facing the flywheel body 11 and overlapping with the first flywheel housing 11a in the axial direction A. The first sealing spring sheet 13 is located in the slit space between the friction ring 14 and the first flywheel housing 11a. The friction ring 14 and the first flywheel housing 11a maintain a clamping force on the first sealing spring sheet 13 in the axial direction A. Under the action of the clamping force, the first sealing spring sheet 13 forms a line contact with the friction ring 14 and the first flywheel housing 11a respectively.

[0030] In some optional embodiments, the friction ring 14 includes a friction ring radial portion 141 extending in a radial direction R, and a friction ring axial portion 142 extending in an axial direction A toward the flywheel body 11. In this way, the friction ring 14, the first sealing spring sheet 13 and the first flywheel housing 11a substantially surround the slit space. The first sealing spring sheet 13 is clamped between the friction ring radial portion 141 and the first flywheel housing 11a, and the friction ring axial portion 142 can effectively prevent water outside the torque transmission device 1 from entering the internal space, which further improves the waterproof effect of the torque transmission device 1.

[0031] In some optional embodiments, the friction ring radial portion 141 and the friction ring axial portion 142 may be integrally formed, for example, by molding.

[0032] Furthermore, in some optional embodiments, a second sealing spring sheet 15 may be provided between the flywheel body 11 and the wheel hub 12. Figure 2-3 As shown, the second sealing spring sheet 15 is arranged between the first flywheel housing 11a and the wheel hub 12, and is located in the cavity structure of the flywheel body 11 on the inner side relative to the first sealing spring sheet 13, so that the first sealing spring sheet 13 plays the role of a first layer of sealing, and the second sealing spring sheet 15 plays the role of a second layer of sealing inside the cavity structure to provide a better waterproof effect. Optionally, the second sealing spring sheet 15 can be made of metal material.

[0033] In some embodiments, Figure 2-3 As shown, the second sealing spring sheet 15 includes: a second sealing spring sheet main body 151, which is arranged on the hub 12; a second sealing spring sheet bending portion 152, which is bent and extended toward the flywheel body 11, for example, Figure 2-3In the embodiment, the second sealing spring piece 15 is bent and extended toward the first flywheel housing 11a; and a second sealing spring piece contact portion 153 is arranged at one end of the second sealing spring piece 15 facing the flywheel body 11. The second sealing spring piece contact portion 153 is parallel to the surface of the flywheel body 11, that is, the second sealing spring piece contact end 153 is bent and extended from the second sealing spring piece bent portion 152 toward a direction parallel to the hub 12. In this way, under the action of the clamping force in the axial direction A maintained by the flywheel body 11 and the hub 12 on the second sealing spring piece 15, the second sealing spring piece contact portion 153 forms a surface contact with the flywheel body 11, which can make the sealing contact between the second sealing spring piece 15 and the flywheel body 11 tighter than line contact, thereby improving the sealing effect.

[0034] In some optional embodiments, the sealing spring sheet may be made of a metal material. The friction ring 14 and the flywheel body 11 maintain a clamping force on the first sealing spring sheet 13, and can cause the first sealing spring sheet 13 to deform, so that the first sealing spring sheet 13 is in closer contact with the friction ring 14 and the flywheel body 11, respectively, and the waterproof effect is better.

[0035] Furthermore, the friction ring 14 may be made of a plastic material, such as PA66 material, so that the first sealing spring sheet 13 is in non-rigid contact with the friction ring 14 made of plastic material, which can achieve a better sealing effect and thus improve the waterproof performance.

[0036] Figure 4 Shows Figure 2 A magnified schematic diagram of area b. Figure 2 and Figure 4 In some optional embodiments, the cover plate 16 includes a cover plate main body 161, a cover plate bent portion 162, and a cover plate contact end 163. The cover plate main body 161 is disposed on the flywheel body 11; the cover plate bent portion 162 is bent and extended toward the wheel hub 12; and the cover plate contact end 163 is bent and extended from the cover plate bent portion 162 toward a direction parallel to the wheel hub 12.

[0037] Exemplarily, the cover plate main body 161 is disposed on the second flywheel housing 11 b , so as to seal an opening of another area of ​​the torque transmission device 1 to prevent external water from entering the interior of the torque transmission device 1 .

[0038] In some optional embodiments, the torque transmission device 1 further includes a sealing ring 17. The sealing ring 17 is disposed between the cover plate 16 and the wheel hub 12, and the cover plate 16 and the wheel hub 12 maintain a clamping force on the sealing ring 17 in the axial direction A to form a seal.

[0039] Optionally, the sealing ring 17 can be made of plastic material, so that the sealing ring 17 has a certain deformation ability. The sealing ring 17 can be pressed into the narrow gap between the cover plate 16 and the wheel hub 12 along the radial direction R. Under the clamping force of the cover plate 16 and the wheel hub 12 on the sealing ring 17 in the axial direction A, the two axial sides of the sealing ring 17 are in surface contact with the cover plate 16 and the wheel hub 12 respectively. More specifically, the two axial sides of the sealing ring 17 are in surface contact with the cover plate contact end 163 and the wheel hub 12 respectively.

[0040] In some optional embodiments, the cover plate bending portion 162 is provided with a cover plate sealing groove 164 , and the end of the sealing ring 17 facing the cover plate bending portion 162 is provided with a sealing ring protrusion 173 , and the sealing ring protrusion 173 is pressed into the cover plate sealing groove 164 .

[0041] Specifically, the sealing ring 17 includes a sealing ring body 171, a sealing ring bent portion 172, and a sealing ring protrusion 173. The sealing ring body 171 is pressed into the narrow gap between the cover plate contact end 163 and the wheel hub 12 along the radial direction R; the sealing ring bent portion 172 extends from one end of the sealing ring body 171 facing away from the pressing direction toward the cover plate bent portion 162, and a sealing ring protrusion 173 facing the cover plate sealing groove 164 is formed at the free end of the sealing ring bent portion 172.

[0042] Further, a cover plate sealing groove 164 is formed on one side of the cover plate bent portion 162 facing the sealing ring bent portion 172. The cover plate sealing groove 164 may be an annular groove, and the sealing ring protrusion 173 may be an annular protrusion matching the shape of the cover plate sealing groove 164. The sealing ring protrusion 173 may be pressed into the cover plate along the radial direction R to form a seal.

[0043] In this way, two seals are formed between the cover plate 16 and the wheel hub 12: the seal formed between the cover plate sealing groove 164 and the sealing ring protrusion 173, and the seal formed between the cover plate contact end 163 and the wheel hub 12, thereby improving the sealing effect.

[0044] In some optional embodiments, the sealing ring 17 further includes a sealing ring clamping portion 174. An elastically deformable sealing ring clamping portion 174 is provided at one end of the sealing ring 17 that enters the slit space between the cover plate contact end 163 and the wheel hub 12, and the sealing ring 17 is pressed between the cover plate 16 and the wheel hub 12 and clamped with the cover plate contact end 163 through the sealing ring clamping portion 174.

[0045] Exemplarily, one end of the sealing ring main body 171 that enters the slit space between the cover plate contact end 163 and the wheel hub 12 is provided with a convex portion facing the cover plate contact end 163 to form the sealing ring clamping portion 174. In order to make the sealing ring clamping portion 174 easy to deform, so that the sealing ring main body 171 can be pressed into the slit space and rebound to form a clamping connection. Specifically, the portion between the sealing ring clamping portion 174 and the sealing ring main body 171, that is, the area where the sealing ring 17 is bent toward the cover plate contact end 163, is formed with a sealing annular variable groove 175 to make the sealing ring clamping portion 174 easier to elastically deform. Furthermore, the sealing ring clamping portion 174 made of plastic material and having a certain elastic deformation ability can rebound after the sealing ring main body 171 is pressed into the slit space, and form a clamping connection with the cover plate contact end 163 to prevent the sealing ring 17 from slipping off.

[0046] An embodiment of the present invention further provides a vehicle transmission system, comprising a torque transmission device 1 as described in any one of the above embodiments, an engine 2, and a gearbox 3. One axial end of the torque transmission device 1 is connected to the engine 2, and the other axial end of the torque transmission device 1 is connected to the gearbox 3.

[0047] It should be understood that the shape, structure, quantity and installation method of the first sealing spring piece 13, the second sealing spring piece 15 and the sealing ring 17 of the technical solution of the present invention can be changed in various ways and are not limited to the types described in the embodiment and shown in the drawings.

[0048] In addition, the application of the torque transfer device, especially its sealing structure, to the vehicle transmission system in the present invention is only exemplary, and the torque transfer device can also be applied to other structures in the vehicle transmission system, and used in structures of transmission systems other than the vehicle transmission system.

[0049] Although possible embodiments are described exemplarily in the above description, it should be understood that there are still a large number of variations of embodiments through all known and other technical features and embodiments that can be easily thought of by the skilled person. It should also be understood that the exemplary embodiments are only examples and such embodiments do not limit the scope of protection, application and construction of the present invention in any form. The above description is more to provide a technical guide for converting at least one exemplary embodiment to the skilled person, wherein various changes can be made, especially changes in the functions and structures of the components, as long as they do not depart from the scope of protection of the claims.

[0050] Reference numerals list

[0051] 1. Torque transmission device; 11. Flywheel body; 11a. First flywheel housing; 11b Second flywheel housing; 12. Wheel hub; 13. First sealing spring sheet; 14. Friction ring; 141. Radial portion of friction ring; 142. Axial portion of friction ring; 15. Second sealing spring sheet; 151. Main body of second sealing spring sheet; 152. Bending portion of second sealing spring sheet; 153. Contact portion of second sealing spring sheet; 16. Cover plate; 161. Main body of cover plate; 162. Bending portion of cover plate; 163. Contact end of cover plate; 164. Sealing groove of cover plate; 17. Sealing ring; 171. Main body of sealing ring; 172. Bending portion of sealing ring; 173. Protruding portion of sealing ring; 174. Clamping portion of sealing ring; 175. Sealing annular variable groove; 18. Elastic vibration damping element; 2. Engine; 3. Gearbox.

Claims

1. A torque transmission device, characterized in that: include: Flywheel body (11); A wheel hub (12) which is relatively rotatable and coaxially arranged with the flywheel body (11), and a friction ring (14) is arranged on the side of the wheel hub (12) facing the flywheel body (11); A first sealing spring sheet (13); which is arranged between the friction ring (14) and the flywheel body (11); A second sealing spring sheet (15) is arranged between the wheel hub (12) and the flywheel body (11); a cover plate (16) disposed on a side of the flywheel body (11) facing the wheel hub (12); and A sealing ring (17) disposed between the cover plate (16) and the wheel hub (12); The wheel hub (12) and the flywheel body (11) maintain a clamping force on the first sealing spring sheet (13) and the second sealing spring sheet (15) in the axial direction (A), and the cover plate (16) and the wheel hub (12) maintain a clamping force on the sealing ring (17) in the axial direction (A) to form a seal.

2. The torque transmission device according to claim 1, characterized in that: A second sealing spring piece contact portion (153) parallel to the surface of the flywheel body (11) is provided at one end of the second sealing spring piece (15) facing the flywheel body (11), and the second sealing spring piece contact portion (153) is in surface contact with the flywheel body (11).

3. The torque transmission device according to claim 1, characterized in that: The cover plate (16) comprises: A cover plate main body (161) disposed on the flywheel main body (11); A cover plate bent portion (162) bent and extended toward the wheel hub (12); and The cover plate contact end (163) is bent and extended from the cover plate bending portion (162) toward a direction parallel to the wheel hub (12).

4. The torque transmission device according to claim 3, characterized in that: The cover plate bending portion (162) is provided with a cover plate sealing groove (164), and one end of the sealing ring (17) facing the cover plate bending portion (162) is provided with a sealing ring protrusion (173), and the sealing ring protrusion (173) is pressed into the cover plate sealing groove (164).

5. The torque transmission device according to claim 3, characterized in that: An elastically deformable sealing ring clamping portion (174) is provided at one end of the sealing ring (17) that enters the narrow gap between the cover plate contact end (163) and the wheel hub (12); the sealing ring (17) is pressed between the cover plate (16) and the wheel hub (12) and is clamped to the cover plate contact end (163) via the sealing ring clamping portion (174).

6. The torque transmission device according to claim 5, characterized in that: A sealing annular variable groove (175) is formed in the bent area between the sealing ring clamping portion (174) and the sealing ring main body (171), so that the sealing ring clamping portion (174) can be elastically deformed.

7. The torque transmission device according to claim 1, characterized in that: The sealing ring (17) is made of plastic material.

8. The torque transmission device according to claim 1, characterized in that: The first sealing spring sheet (13) is made of metal material.

9. The torque transmission device according to claim 1, characterized in that: The friction ring (14) comprises a friction ring radial portion (141) extending in a radial direction (R), and a friction ring axial portion (142) extending in an axial direction (A) toward the flywheel body (11).

10. A vehicle transmission system, comprising a torque transfer device (1), an engine (2) and a gearbox (3) according to any one of claims 1 to 9; one axial end of the torque transfer device (1) is cooperatively connected to the engine (2), and the other axial end of the torque transfer device (1) is cooperatively connected to the gearbox (3).

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