A variable damper

Abstract

The present invention relates to a variable damper, which comprises a driving disc, a first damping disc, a second damping disc, a trapezoidal spline hub, trapezoidal damping sheets, elastic members and a disc core; the first damping disc and the second damping disc are respectively located on both sides of the driving disc; the trapezoidal spline hub is fixed to the first damping disc, and a first inclined wedge body extending circumferentially is arranged on one side; the trapezoidal damping sheets are fixed to the driving disc, and a second inclined wedge body extending circumferentially is arranged on one side, and the second inclined wedge body is wedged with the first inclined wedge body; the other side of the trapezoidal damping sheets presses the elastic members against the second damping disc; the disc core is connected to the trapezoidal spline hub; by arranging the trapezoidal spline hub and the trapezoidal damping sheets to be wedged, the present invention can control the frictional damping by adjusting the angle of rotation of the trapezoidal spline hub relative to the trapezoidal damping sheets; when the groove of the first inclined wedge body cooperates with the boss of the second inclined wedge body, the frictional damping is small; when the boss of the first inclined wedge body cooperates with the boss of the second inclined wedge body, the frictional damping is large.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive chassis drive systems, and particularly to a variable damper. Background Art

[0002] During the operation of a hybrid vehicle, there are different driving conditions, such as idle condition, driving condition, and power generation condition, etc. Different conditions require their respective corresponding damping frequencies.

[0003] With the continuous improvement of the requirements for ride comfort during vehicle operation and the continuous development of hybrid vehicles, it is particularly necessary to match a high-performance damper for hybrid vehicles. Although the dual-mass flywheel has good overall damping performance, its structure does not have a multi-stage variable damping mechanism with adjustable damping, and it is unable to better optimize the damping effect under various conditions of the whole vehicle. Summary of the Invention

[0004] Based on the above description, the present invention provides a variable damper to enable the damper to set different damping values to meet the damping requirements of the damper under various different conditions.

[0005] The technical solution for the present invention to solve the above technical problems is as follows: A variable damper includes a driving disk, a first damping disk, a second damping disk, a trapezoidal spline hub, trapezoidal damping plates, elastic members, and a disk core; the driving disk is used to connect to the engine, and the first damping disk and the second damping disk are respectively located on both sides of the driving disk; the trapezoidal spline hub is fixed to the first damping disk, and a first wedge is provided on one side, and the first wedge is arranged in a ring around the axis of the trapezoidal spline hub; the trapezoidal damping plates are fixed to the driving disk, and a second wedge is provided on one side, and the second wedge is arranged in a ring around the axis of the trapezoidal damping plates, and the second wedge is wedged with the first wedge; the other side of the trapezoidal damping plates presses the elastic members against the second damping disk; the disk core is connected to the trapezoidal spline hub, and the disk core is used to connect to the transmission.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Further, at least one spring groove is circumferentially formed on the driving disk, and an arc spring is arranged in each spring groove; at least one stopper is axially arranged on one side of the first damping disk and the second damping disk close to the driving disk, and the stoppers and the spring grooves are arranged alternately; both ends of the arc spring respectively abut against the stoppers.

[0008] Further, limiting grooves matching with the spring grooves are formed in both the first damping disc and the second damping disc, and limiting plates for blocking the arc-shaped spring are arranged on one sides of the first damping disc and the second damping disc away from the driving disc.

[0009] Further, a convex ring is arranged on the inner side of the trapezoidal spline hub away from the first damping disc; the convex ring penetrates through the trapezoidal damping piece, the driving disc and the corrugated spring and is in close contact with the second damping disc; the first damping disc, the convex ring and the second damping disc are fixedly connected by rivets.

[0010] Further, one side of the trapezoidal damping piece away from the trapezoidal spline hub is adhered to one side of the driving disc; one side of the corrugated spring is in close contact with the other side of the driving disc, and the other side of the corrugated spring is in close contact with the second damping disc.

[0011] Further, external teeth are arranged on the outer side of the convex ring, tooth grooves adapted to the external teeth are arranged on the inner side of the driving disc, and the groove width of the tooth grooves is greater than the tooth width of the external teeth.

[0012] Further, internal teeth are arranged on the inner side of the convex ring, and the disc core is inserted into the convex ring and meshes with the internal teeth.

[0013] Further, internal splines are arranged on the inner side of the disc core and are adapted to external splines on the input shaft of the gearbox.

[0014] Further, the elastic member is a corrugated spring.

[0015] Compared with the prior art, the technical solution of the present application has the following beneficial technical effects:

[0016] In the present invention, by arranging the trapezoidal spline hub and the trapezoidal damping piece to be wedged, the frictional damping can be controlled by adjusting the angle of rotation of the trapezoidal spline hub relative to the trapezoidal damping piece; when the trapezoidal spline hub is rotated so that the groove of the first wedge body cooperates with the boss of the second wedge body, the compression amount of the corrugated spring is small and the generated pressure is small, so the frictional damping is small; when the trapezoidal spline hub is rotated so that the boss of the first wedge body cooperates with the boss of the second wedge body, the compression amount of the corrugated spring is large and the generated pressure is large, so the frictional damping is large. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of a variable damper provided by an embodiment of the present invention;

[0018] Figure 2 is a schematic structural diagram of the trapezoidal spline hub in the embodiment of the present invention;

[0019] Figure 3Schematic diagram of the trapezoidal damping plate in the embodiment of the present invention;

[0020] Figure 4 Schematic diagram of the variable damping system in the small damping state in the embodiment of the present invention;

[0021] Figure 5 Schematic diagram of the variable damping system in the large damping state in the embodiment of the present invention;

[0022] Figure 6 Variable damping effect diagram of the variable damper in the embodiment of the present invention.

[0023] In the drawings, the list of components represented by each reference numeral is as follows:

[0024] 1. Driving disc; 11. Spring groove; 12. Tooth groove; 21. First damping disc; 22. Second damping disc; 23. Limit groove; 24. Limit plate; 25. Stopper; 3. Arc spring; 4. Trapezoidal spline hub; 41. First wedge body; 42. Convex ring; 43. External teeth; 44. Internal teeth; 5. Trapezoidal damping plate; 51. Second wedge body; 6. Wave spring; 7. Disc core; 71. Internal spline; 8. Rivet. Detailed implementation manners

[0025] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. Embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0026] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediate element. In the following embodiments, "connection", if there is an electrical signal or data transmission between the connected circuits, modules, units, etc., should be understood as "electrical connection", "communication connection", etc.

[0027] A variable damper, as Figure 1 shown, includes a driving disc 1, a first damping disc 21, a second damping disc 22, a variable damping system and a disc core 7.

[0028] The engine of the vehicle is connected to the driving disc 1 through a flywheel and drives the driving disc 1 to rotate. The first damping disc 21 and the second damping disc 22 are respectively located on both sides of the driving disc 1. Four spring grooves 11 are circumferentially formed on the driving disc 1, and an arc spring 3 is arranged in each spring groove 11, and the arc spring 7 is arranged along the circumference of the driving disc 1.

[0029] Four limiting grooves 23 are provided on both the first damping disc 21 and the second damping disc 22. The limiting grooves 23 correspond to the spring grooves 11 one by one, and the limiting grooves 23 are respectively adapted to the corresponding spring grooves 11 to align the corresponding sounds. The limiting grooves 3 are respectively used to accommodate the arc springs 3 in the corresponding spring grooves 11. On the sides of the first damping disc 21 and the second damping disc 22 away from the driving disc, four groups of limiting plates 25 are provided. Each group of limiting plates 25 is respectively located on both sides of the limiting groove 23 to block the arc spring 3 and limit the arc spring 3 between the first damping disc 21 and the second damping disc 22 to prevent the arc spring 3 from passing through the limiting groove 23 and falling off.

[0030] Four stoppers 25 are circumferentially provided on the surfaces of the first damping disc 21 and the second damping disc 22 close to the driving disc 1. The four stoppers 25 and the four limiting grooves 23 are alternately arranged so that stoppers 25 are provided at both ends of each limiting groove 23. Both ends of the arc spring 3 respectively abut against the stoppers 25 on both sides.

[0031] When the engine of the vehicle drives the driving disc 1 to rotate, the driving disc 1 pushes the stoppers 25 on both sides through the arc spring 3, thereby driving the first damping disc 21 and the second damping disc 22 to rotate. The driving disc 1 is connected to the first damping disc 21 and the second damping disc 22 through the arc spring 3, and the torque fluctuation is initially attenuated through the arc spring 3.

[0032] The variable damping system is arranged between the first damping disc 21 and the second damping disc and includes a trapezoidal spline hub 4, trapezoidal damping sheets 5 and elastic members.

[0033] One side of the trapezoidal spline hub 4 is closely attached to the first damping disc 21, and as Figure 2 shown, a first wedge 41 is provided on the side of the trapezoidal spline hub 4 away from the first damping disc 21. The first wedge 41 is arranged in a ring around the axis of the trapezoidal spline hub 4. A convex ring 42 is provided on the inner side of the trapezoidal spline hub 4 away from the first damping disc 21. The convex ring 42 penetrates the driving disc 1 and is closely attached to the second damping disc 22. The first damping disc 21, the convex ring 42 and the second damping disc 22 are fixedly connected by rivets 8 to ensure the synchronous rotation of the first damping disc 21 and the second damping disc 22.

[0034] External teeth 43 are provided on the outer side of the convex ring 42, and tooth grooves 12 matching the external teeth 43 are provided on the inner side of the driving disc 1, and the groove width of the tooth grooves 12 is greater than the tooth width of the external teeth 43. When the first damping disc 21 and the second damping disc 22 drive the trapezoidal spline hub 4 to rotate relative to the driving disc 1, the external teeth 43 move in the tooth grooves 12, thereby limiting the angle at which the trapezoidal spline hub 4 is displaced from the driving disc 1.

[0035] An internal tooth 44 is provided on the inner sidewall of the convex ring 42. The disk core 7 is inserted into the convex ring 44 and meshes with the internal tooth 44, causing the disk core 7 to rotate with the trapezoidal spline hub 4. An internal spline 71 is provided on the inner sidewall of the disk core 7, and the external spline on the input shaft of the transmission is connected through the internal spline 71 to transmit torque to the transmission.

[0036] One side of the trapezoidal damping plate 5 is adhered to the side of the driving disk 1 close to the first damping disk 21, and the trapezoidal damping plate 5 is sleeved on the convex ring 42. As Figure 3 shown, a second wedge body 51 is provided on the other side of the trapezoidal damping plate 5. The second wedge body 51 is arranged in a ring shape around the axis of the trapezoidal damping plate 5, and the first wedge body 41 and the second wedge body 42 are wedged together. In addition, an elastic member is provided between the driving disk 1 and the second damping disk 22, and the trapezoidal damping plate 5 presses the elastic member against the second damping disk 22 through the driving disk 1. In this embodiment, the elastic member is a corrugated spring 6. The corrugated spring 6 has a large stiffness range, strong buffering and vibration absorption capabilities, a large deformation energy per unit volume of material, and a compact structure, which is convenient for reducing the occupied space of the variable damper in this embodiment.

[0037] The corrugated spring 6 provides pressure to the trapezoidal damping plate 5, generating a frictional force between the trapezoidal damping plate 5 and the trapezoidal spline hub 4, thus generating frictional damping, further attenuating torque fluctuations, and making the working environment of the transmission more stable. The frictional damping can be controlled by adjusting the angle of rotation of the trapezoidal spline hub 4 relative to the trapezoidal damping plate 5.

[0038] Specifically, as Figure 4 shown, when the trapezoidal spline hub 4 is rotated so that the groove of the first wedge body 41 cooperates with the boss of the second wedge body 51, the overall thickness of the trapezoidal spline hub 4 and the trapezoidal damping plate 5 is small. Therefore, the compression amount of the corrugated spring 6 is small, the pressure generated by the corrugated spring 6 is small, and the frictional damping is small.

[0039] As Figure 5 shown, when the trapezoidal spline hub 4 is rotated so that the boss of the first wedge body 41 cooperates with the boss of the second wedge body 51, the overall thickness of the trapezoidal spline hub 4 and the trapezoidal damping plate 5 is large. Therefore, the corrugated spring 6 is pressed tighter, the compression amount of the corrugated spring 6 is large, the pressure generated by the corrugated spring 6 is large, and the frictional damping is large.

[0040] Figure 6 This is the variable damping effect diagram of the variable damper in this embodiment. As Figure 6 shown, the variable damper in this embodiment can adjust the magnitude of the frictional damping by adjusting the angle of rotation of the trapezoidal spline hub 4 relative to the trapezoidal damping plate 5, improving the flexibility of the damping design of the product. Different damping values can be designed in different damping intervals, effectively improving the adaptability of the damper to different working conditions.

[0041] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A variable damper, characterized in that, It includes a driving disk (1), a first damping disk (21), a second damping disk (22), a trapezoidal spline hub (4), a trapezoidal damping sheet (5), an elastic member, and a disk core (7); the driving disk (1) is used to connect to the engine, and the first damping disk (21) and the second damping disk (22) are respectively located on both sides of the driving disk (1); the trapezoidal spline hub (4) is fixed to the first damping disk (21), and a first wedge (41) is provided on one side, and the first wedge (41) is arranged in a ring around the axis of the trapezoidal spline hub (4); the trapezoidal damping sheet (5) is fixed to the driving disk (1), and a second wedge (51) is provided on one side, and the second wedge (51) is arranged in a ring around the axis of the trapezoidal damping sheet (5), and the second wedge (51) is wedged with the first wedge (41); the other side of the trapezoidal damping sheet (5) presses the elastic member against the second damping disk (22); the trapezoidal spline hub (4) is provided with internal teeth (44), and the disk core (7) is inserted into the trapezoidal spline hub (4) and meshes with the internal teeth (44), and the disk core (7) is used to connect to the transmission; At least one spring groove (11) is circumferentially formed on the driving disk (1), and an arc spring (3) is arranged in each spring groove (11); at least one stop block (25) is axially arranged on one side of the first damping disk (21) and the second damping disk (22) close to the driving disk (1), and the stop blocks (25) and the spring grooves (11) are arranged alternately; both ends of the arc spring (3) respectively abut against the stop blocks (25); Limit grooves (23) matching the spring grooves (11) are formed on both the first damping disk (21) and the second damping disk (22), and a limit plate (24) for blocking the arc spring (3) is arranged on one side of the first damping disk (21) and the second damping disk (22) away from the driving disk (1); The elastic member is a wave spring (6); a convex ring (42) is arranged on the inner side of the trapezoidal spline hub (4) away from the first damping disk (21); the convex ring (42) penetrates through the trapezoidal damping sheet (5), the driving disk (1), and the wave spring (6) and abuts tightly against the second damping disk (22); the first damping disk (21), the convex ring (42), and the second damping disk (22) are fixedly connected by rivets (8).

2. The variable damper according to claim 1, characterized in that, One side of the trapezoidal damping sheet (5) away from the trapezoidal spline hub (4) is adhered to one side of the driving disk (1); one side of the wave spring (6) abuts tightly against the other side of the driving disk (1), and the other side of the wave spring (6) abuts tightly against the second damping disk (22).

3. A variable damper according to claim 1, characterized in that, External teeth (43) are arranged on the outer side of the convex ring (42), and tooth grooves (12) adapted to the external teeth (43) are arranged on the inner side of the driving disk (1), and the groove width of the tooth grooves (12) is greater than the tooth width of the external teeth (43).

4. A variable damper according to claim 1, characterized in that, An internal spline (71) is provided on the inner side of the disk core (7) and is adapted to match with an external spline on the input shaft of the gearbox.

5. A variable damper according to claim 1, characterized in that, The elastic member is a corrugated spring (6).

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