Torque transmission device and vehicle transmission system

Abstract

The present invention relates to a torque transmission device and a vehicle transmission system. The torque transmission device comprises: a flywheel body; a hub, which is relatively rotatably and coaxially arranged with the flywheel body; a sealing ring; a first friction ring, which is arranged on the side of the hub facing the flywheel body, the first friction ring comprising a first friction ring radial portion that extends in the radial direction and a first friction ring axial portion that extends in the axial direction; and a second friction ring, which is arranged on the side of the flywheel body facing the hub, the second friction ring comprising a second friction ring radial portion that extends in the radial direction and a second friction ring axial portion that extends in the axial direction. The sealing ring is arranged between the first friction ring radial portion and the second friction ring radial portion, and the first friction ring axial portion extends beyond the edge of the radial inner side of the flywheel body in the axial direction. The sealing ring is in non-rigid contact with the first friction ring and the second friction ring, enabling sealing performance to be improved.

Description

Torque transmission device and vehicle transmission system 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, cars are playing an increasingly important role in people's daily lives, which has prompted people to have higher and higher requirements for various performance of cars. In particular, the requirements for waterproofing of various vehicle components have been greatly improved.

[0003] Current vehicle transmission systems are equipped with torque transfer devices, such as shock absorbers, to reduce torsional vibrations transmitted from the engine to the transmission. A gap exists between the shock absorber's flywheel body and the wheel hub. To prevent external water from entering the shock absorber through the gap between the flywheel body and the wheel hub, current shock absorber designs incorporate a sealing ring in the gap between the flywheel body and the wheel hub. However, because the sealing ring and the flywheel body are both made of metal and the contact between them is rigid line contact, the sealing effect is poor. External water can easily enter the shock absorber through the gap between the sealing ring and other components, thereby affecting its performance.

[0004] Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a torque transmission device and a vehicle transmission system.

[0006] An embodiment of the present invention provides a torque transmission device comprising: a flywheel body; a hub rotatable relative to and coaxially disposed with the flywheel body; a sealing ring; a first friction ring disposed on the side of the hub facing the flywheel body, the first friction ring having an L-shaped structure and including a first friction ring radial portion extending radially toward a second friction ring, and a first friction ring axial portion extending axially toward the second friction ring; and a second friction ring disposed on the side of the flywheel body facing the hub, the second friction ring having an L-shaped structure and including a second friction ring radial portion extending radially toward the first friction ring, and a second friction ring axial portion extending axially toward the first friction ring. The sealing ring is disposed between the first friction ring radial portion and the second friction ring radial portion, the first friction ring axial portion extending axially beyond the radially inner edge of the flywheel body to form a gap seal.

[0007] According to some embodiments of the present invention, the sealing ring is an elastic sealing ring made of elastic material.

[0008] According to some embodiments of the present invention, the sealing ring is a sealing spring leaf.

[0009] According to some embodiments of the present invention, the first friction ring and the second friction ring are made of plastic.

[0010] According to some embodiments of the present invention, the first friction ring and the second friction ring are made of PA66 material.

[0011] According to some embodiments of the present invention, the flywheel body and the hub partially overlap in axial projection, and the first friction ring radial portion is fixedly disposed on a side of the hub that overlaps with the wheel body projection and faces the flywheel body.

[0012] According to some embodiments of the present invention, the flywheel body partially overlaps with the hub in the axial projection, and the second friction ring radial portion is fixedly arranged on the side of the flywheel body that overlaps with the hub projection and faces the hub.

[0013] According to some embodiments of the present invention, the first friction ring and the second friction ring are made of plastic material.

[0014] According to some embodiments of the present invention, the first friction ring radial portion and the first friction ring axial portion are integrally formed; and the second friction ring radial portion and the second friction ring axial portion are integrally formed.

[0015] 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.

[0016] In the field of vehicle transmission technology, the present invention provides a torque transmission device and a vehicle transmission system. By arranging a sealing ring with elastic deformation between a first friction ring and a second friction ring, the sealing ring undergoes elastic deformation under the action of the axial clamping force of the first friction ring and the second friction ring on the sealing ring, thereby making the sealing ring contact the first friction ring and the second friction ring respectively, thereby providing better sealing performance, enhancing the waterproof effect, and thus ensuring the working performance of the torque transmission device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] FIG1 shows a schematic diagram of a vehicle transmission system according to an embodiment of the present invention; and

[0019] FIG. 2 shows a partial cross-sectional view of a torque transmission device according to an embodiment of the present invention.

[0020] It should be understood that the above drawings are merely schematic and are not drawn according to actual scale. DETAILED DESCRIPTION

[0021] To make the purpose, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field fall within the scope of protection of the present disclosure.

[0022] 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 of ordinary skill in the field to which the invention belongs. The words "include" or "comprise" and the like used in the embodiments of the present invention mean that the elements or objects preceding 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 relative to the invention, and may change accordingly according to the change in the orientation of the components in the drawings.

[0023] The present invention aims to improve a torque transmission device, particularly one used in a vehicle transmission system, by avoiding direct, rigid line contact between metal components, thereby providing improved waterproofing. The torque transmission device of the present invention may be used in, but is not limited to, shock absorbers and may also be applied to other structures used for torque transmission.

[0024] Figure 1 shows a schematic diagram of a vehicle transmission system according to an embodiment of the present invention, and Figure 2 shows a partial cross-sectional view of a torque transfer device according to an embodiment of the present invention. In some embodiments, the torque transfer device may be a shock absorber used in a vehicle transmission system. As shown in Figures 1-2 , the vehicle transmission system includes a torque transfer device 1, an engine 2, and a transmission 3. One axial end of the torque transfer device 1 is coupled to the engine 2, and the other axial end of the torque transfer device 1 is coupled to the transmission 3.

[0025] Specifically, the torque transmission device 1 includes a flywheel body 11 and a hub 12, which are arranged substantially coaxially. The flywheel body 11 and the hub 12 can be made of a metal material having a certain degree of rigidity. The flywheel body 11 includes a first flywheel housing 11a and a second flywheel housing 11b arranged along an axial direction A. As shown in FIG2 , in the axial direction A, the right half of the flywheel body 11 in the figure is the first flywheel housing 11a, and the left half is the second flywheel housing 11b. The first flywheel housing 11a and the second flywheel housing 11b are coaxially overlapped to form the flywheel body 11 having a cavity structure. An elastic vibration damping element 16 is disposed in the cavity between the flywheel bodies 11 to transmit torque and reduce vibration between the engine 2 and the gearbox 3.

[0026] Furthermore, the wheel hub 12 is coaxial with the flywheel body 11 and is relatively rotatable. Optionally, as shown in Figures 1-2, the wheel hub 12 is relatively rotatably connected to the first flywheel housing 11a via a sealing ring 13; the second flywheel housing 11b is cooperatively connected to the engine 2, and the wheel hub 12 is cooperatively connected to the gearbox 3. In the working state, the engine 2 drives the flywheel body 11 to rotate, and the torque between the flywheel body 11 and the wheel hub 12 is transmitted to the internal and rigid connection parts of the wheel hub 12 through the elastic vibration damping element 16. The rotation of the wheel hub 12 and the rotation of the flywheel body 11 gradually change from relative rotation to synchronous rotation, thereby transmitting the torque of the engine 2 to the gearbox 3.

[0027] In some optional embodiments, the torque transmission device includes: a flywheel body 11, a hub 12, and a sealing ring 13. The sealing ring 13 is disposed between the hub 12 and the flywheel body 11. A first friction ring 14 is disposed on the side of the hub 12 facing the flywheel body 11, and a second friction ring 15 is disposed on the side of the flywheel body 11 facing the hub 12. The first friction ring 14 and the second friction ring 15 maintain a clamping force on the sealing ring 13, and the sealing ring 13 is in non-rigid line contact with the first friction ring 14 and the second friction ring 15, respectively.

[0028] In some embodiments, as shown in FIG2 , the first flywheel housing 11a of the flywheel body 11 partially overlaps the hub 12 in the axial direction A. An annular slit space is formed between the first flywheel housing 11a and the hub 12. The first friction ring 14 can be disposed on the portion of the hub 12 facing the flywheel body 11 that overlaps the first flywheel housing 11a in the axial direction A. The second friction ring 15 can be disposed on the portion of the first flywheel housing 11a facing the hub 12 that overlaps the hub 12 in the axial direction A. The sealing ring 13 is located in the slit space between the first and second friction rings 14, 15. The first and second friction rings 14, 15 maintain a clamping force on the sealing ring 13 in the axial direction A. Under the action of this clamping force, the sealing ring 13 makes surface contact with the first and second friction rings 14, 15, respectively. When the hub 12 and the flywheel body 11 rotate relative to each other, surface contact between the relatively moving components is ensured, thereby improving waterproofing.

[0029] Furthermore, the first friction ring 14 has an L-shaped structure and includes a first friction ring radial portion 141 extending in a radial direction R toward the second friction ring 15, and a first friction ring axial portion 142 extending in an axial direction A toward the second friction ring 15. The second friction ring 15 also has an L-shaped structure and includes a second friction ring radial portion 151 extending in a radial direction R toward the first friction ring 14, and a second friction ring axial portion 152 extending in an axial direction A toward the first friction ring 14. Under the action of the clamping force in the axial direction A, the sealing ring 13 makes surface contact with the first friction ring radial portion 141 and the second friction ring radial portion 151, respectively. Thus, the first friction ring 14 and the second friction ring 15 substantially enclose the narrow space, effectively preventing water from outside the torque transmission device 1 from entering the internal space, further enhancing the waterproofing of the torque transmission device 1.

[0030] Furthermore, the first friction ring axial portion 142 extends beyond the radially inner edge of the flywheel body 11 in the axial direction A to form a gap seal, thereby further enhancing the waterproofing effect of the torque transmission device 1. For example, as shown in FIG2 , the first flywheel housing 11a and the hub 12 partially overlap in the axial direction A; the first friction ring axial portion 142 is located radially inward of the first flywheel housing 11a; and the first friction ring axial portion 142 extends toward the first flywheel housing 11a in the axial direction A and beyond the radially inner edge of the first flywheel housing 11a, so that the first friction ring axial portion 142 can effectively prevent external water or other impurities from entering the interior of the flywheel body 11.

[0031] In some optional embodiments, the flywheel body 11 and the wheel hub 12 partially overlap in their projections in the axial direction A. The first friction ring radial portion 141 is fixedly disposed on a side of the wheel hub 12 that overlaps with the projection of the flywheel body 11 and faces the flywheel body 11, while the first friction ring axial portion 142 extends from a radial end of the first friction ring radial portion 141 toward the wheel hub 12 along the axial direction A. The second friction ring radial portion 151 is fixedly disposed on a side of the flywheel body 11 that overlaps with the projection of the wheel hub 12 and faces the wheel hub 12, while the second friction ring axial portion 152 extends from a radial end of the second friction ring radial portion 151 that is away from the first friction ring axial portion 142 toward the flywheel body 11 along the axial direction A.

[0032] In some optional embodiments, the first friction ring radial portion 141 and the first friction ring axial portion 142 may be integrally formed, for example, by molding; the second friction ring radial portion 151 and the second friction ring axial portion 152 may be integrally formed, for example, by molding.

[0033] In some optional embodiments, the sealing ring 13 may be an elastic sealing ring made of an elastic material. The first friction ring 14 and the second friction ring 15 maintain a clamping force on the elastic sealing ring to deform the elastic sealing ring. The surface contact between the elastic sealing ring and the first friction ring 14 and the second friction ring 15 is closer, thereby improving the waterproof effect.

[0034] For example, the cross-section of the elastic sealing ring capable of elastic deformation may be circular. Under the action of the clamping force, the contact surfaces between the sealing ring 13 and the first friction ring 14 and the second friction ring 15 are deformed, forming surface contact. Of course, the cross-section of the elastic sealing ring may also have other shapes, which are not limited here.

[0035] In some optional embodiments, the sealing ring 13 may be a sealing spring sheet. Optionally, the sealing spring sheet may be made of a metal material. The first friction ring 14 and the second friction ring 15 maintain a clamping force on the sealing spring sheet and can deform the sealing spring sheet to ensure closer contact between the sealing spring sheet and the first friction ring 14 and the second friction ring 15, respectively, thereby improving the waterproof effect.

[0036] Furthermore, the first friction ring 14 and the second friction ring 15 can be made of plastic material, so that the elastic sealing spring sheet and the plastic first friction ring 14 and the second friction ring 15 are in non-rigid contact, which can improve the sealing effect and thus enhance the waterproof performance. Optionally, the first friction ring 14 and the second friction ring 15 can be made of PA66 material.

[0037] An embodiment of the present invention further provides a vehicle transmission system, comprising a torque transmission device 1 as described in any of the above embodiments, an engine 2, and a transmission 3. One axial end of the torque transmission device 1 is coupled to the engine 2, and the other axial end of the torque transmission device 1 is coupled to the transmission 3.

[0038] It should be understood that the shape, structure, quantity and installation method of the sealing ring 13, the first friction ring 14 and the second friction ring 15 in 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.

[0039] In addition, the application of the torque transmission device, especially its sealing structure, to the vehicle transmission system in the present invention is only exemplary. The torque transmission 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.

[0040] While the foregoing descriptions illustrate possible embodiments, it should be understood that numerous variations exist through combinations of all known and readily conceivable technical features and implementations. Furthermore, it should be understood that the exemplary implementations are merely examples and do not in any way limit the scope, application, or configuration of the present invention. The foregoing descriptions are intended primarily to provide technical guidance for adapting at least one exemplary embodiment to the present invention. Various modifications, particularly regarding the functionality and structure of the components described, may be made without departing from the scope of the claims.

[0041] Table of reference numerals 1. Torque transmission device; 11. Flywheel body; 11a. First flywheel housing; 11b Second flywheel housing; 12. Wheel hub; 13. Sealing ring; 14. First friction ring; 141. First friction ring radial portion; 142. First friction ring axial portion; 15. Second friction ring; 151. Second friction ring radial portion; 152. Second friction ring axial portion; 16. 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 rotatable relative to the flywheel body (11) and is coaxially arranged; Sealing ring (13); a first friction ring (14) arranged on a side of the hub (12) facing the flywheel body (11), the first friction ring (14) being an L-shaped structure, comprising a first friction ring radial portion (141) extending along a radial direction (R) toward the second friction ring (15), and a first friction ring axial portion (142) extending along an axial direction (A) toward the second friction ring (15); as well as a second friction ring (15) arranged on a side of the flywheel body (11) facing the hub (12), the second friction ring (15) being an L-shaped structure, comprising a second friction ring radial portion (151) extending along a radial direction (R) toward the first friction ring (14), and a second friction ring axial portion (152) extending along an axial direction (A) toward the first friction ring (14); The sealing ring (13) is arranged between the first friction ring radial portion (141) and the second friction ring radial portion (151), and the first friction ring axial portion (142) extends in the axial direction (A) beyond the radial inner edge of the flywheel body (11) to form a gap seal.

2. The torque transmission device according to claim 1, characterized in that: The sealing ring (13) is an elastic sealing ring made of elastic material.

3. The torque transmission device according to claim 1, characterized in that: The sealing ring (13) is a sealing spring sheet.

4. The torque transmission device according to claim 1, characterized in that: The first friction ring (14) and the second friction ring (15) are made of plastic.

5. The torque transmission device according to claim 4, characterized in that: The first friction ring (14) and the second friction ring (15) are made of PA66 material.

6. The torque transmission device according to claim 1, characterized in that: The projections of the flywheel body (11) and the wheel hub (12) in the axial direction (A) overlap, and the first friction ring radial portion (141) is fixedly arranged on the side of the wheel hub (12) that overlaps with the projection of the wheel body (11) and faces the flywheel body (11).

7. The torque transmission device according to claim 1, characterized in that: The projections of the flywheel body (11) and the wheel hub (12) in the axial direction (A) overlap, and the second friction ring radial portion (151) is fixedly arranged on the side of the flywheel body (11) that overlaps with the projection of the wheel hub (12) and faces the wheel hub (12).

8. The torque transmission device according to claim 1, characterized in that: The first friction ring radial portion (141) and the first friction ring axial portion (142) are integrally formed; and the second friction ring radial portion (151) and the second friction ring axial portion (152) are integrally formed.

9. The torque transmission device according to claim 3, characterized in that: The sealing spring sheet is made of metal material.

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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