Shock absorber, powertrain and vehicle

Abstract

The application discloses a damper, a power assembly and a vehicle, and relates to the technical field of dampers, and comprises a mass disc, a centrifugal pendulum assembly and a damping elastic element. The mass disc is suitable for being connected with an engine, and the mass disc has a first rotating part. The centrifugal pendulum assembly comprises a flange and a first centrifugal block. The flange has a second rotating part, and the mass disc drives the flange to rotate by pushing the second rotating part through the first rotating part when the mass disc rotates. The first centrifugal block is slidably installed on the flange in the rotating direction of the flange. The damping elastic element is located between the first rotating part and the second rotating part, and the damping elastic element transmits the driving power for rotating the flange by being compressed by the first rotating part and the second rotating part. A torque limiting assembly is suitable for being connected with a gearbox, and the torque limiting assembly is in contact with the flange. The torque limiting assembly limits the maximum torque transmitted to the gearbox by the friction between the torque limiting assembly and the flange. The damper according to the embodiment of the application not only has the function of limiting torque, but also has the advantages of good damping effect, smooth torque transmission and the like.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a shock absorber, powertrain, and vehicle. Background Technology

[0002] Shock absorbers are mainly used in automotive powertrain systems, typically installed between the engine and transmission to reduce vibration and noise. However, some shock absorbers in this technology suffer from poor damping performance and unstable torque transmission due to unreasonable structures. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a vibration damper that not only achieves torque limiting function, but also has the advantages of good vibration damping effect and smooth torque transmission.

[0004] The present invention also proposes a powertrain having the above-mentioned shock absorber.

[0005] The present invention also proposes a vehicle having the above-described powertrain.

[0006] To achieve the above objectives, a vibration damper is provided according to a first aspect of the present invention, comprising: a mass disk adapted to be connected to an engine, the mass disk having a first rotating portion; a centrifugal pendulum assembly including a flange and a first centrifugal block, the flange having a second rotating portion, wherein the mass disk, when rotating, pushes the second rotating portion through the first rotating portion to drive the flange to rotate, the first centrifugal block being slidably mounted on the flange along the rotation direction of the flange; a damping elastic member located between the first rotating portion and the second rotating portion, the damping elastic member transmitting the power driving the flange to rotate by being compressed by the first rotating portion and the second rotating portion; and a torque limiting assembly adapted to be connected to a gearbox, the torque limiting assembly being in contact with the flange, the torque limiting assembly limiting the maximum torque transmitted to the gearbox by friction between itself and the flange.

[0007] The vibration damper according to the embodiments of the present invention can not only achieve the torque limiting function, but also has the advantages of good vibration damping effect and smooth torque transmission.

[0008] According to some embodiments of the present invention, the mass disk has a mounting groove on the side facing the centrifugal pendulum assembly; the first rotating part is disposed in the mounting groove and includes a first rotating block and a second rotating block spaced apart circumferentially along the mass disk; at least a portion of the second rotating part is located in the mounting groove and includes a first rotating ear and a second rotating ear spaced apart circumferentially along the flange; the vibration damping elastic element is a plurality of elements including a first vibration damping elastic element and a second vibration damping elastic element, the first rotating block and the second rotating ear are disposed between one end of the first vibration damping elastic element and one end of the second vibration damping elastic element, and the second rotating block and the first rotating ear are disposed between the other end of the first vibration damping elastic element and the other end of the second vibration damping elastic element; wherein, the first rotating part and the second rotating part are offset in the axial direction of the vibration damper, and the first vibration damping elastic element and the second vibration damping elastic element overlap with the first rotating block, the second rotating block, the first rotating ear and the second rotating ear in the axial direction of the vibration damper.

[0009] According to some embodiments of the present invention, a groove structure is provided on the side of the mass disk facing the centrifugal pendulum assembly, the groove structure having a groove extending circumferentially along the mass disk, and the vibration damping elastic element is disposed in the groove of the groove structure.

[0010] According to some embodiments of the present invention, the opening of the groove in the groove structure faces the axis of the mass disk.

[0011] According to some embodiments of the present invention, the mass disk is provided with a mounting groove on the side facing the centrifugal pendulum assembly; the first rotating part is disposed in the mounting groove and includes a first rotating block and a second rotating block spaced apart along the circumference of the mass disk; the sliding groove structure is multiple and includes a first sliding groove member and a second sliding groove member, one end of the first sliding groove member and one end of the second sliding groove member abutting against both sides of the first rotating block in the circumference of the mass disk, and the other end of the first sliding groove member and the other end of the second sliding groove member abutting against both sides of the second rotating block in the circumference of the mass disk.

[0012] According to some embodiments of the present invention, the damping elastic element is an arc-shaped spring.

[0013] According to some embodiments of the present invention, the centrifugal pendulum assembly further includes: a guide slide, the flange having a first slide extending in its rotation direction, the first centrifugal block having a second slide extending in the rotation direction of the flange, and the guide slide passing through the first slide and the second slide.

[0014] According to some embodiments of the present invention, the first centrifugal block includes a first sub-centrifugal block and a second sub-centrifugal block connected together. The first sub-centrifugal block and the second sub-centrifugal block are respectively disposed on both axial sides of the flange and clamp the flange. Both the first sub-centrifugal block and the second sub-centrifugal block are provided with a second slide rail. The guide slide rod passes through the first slide rail, the second slide rail of the first sub-centrifugal block and the second slide rail of the second sub-centrifugal block.

[0015] According to some embodiments of the present invention, the centrifugal pendulum assembly further includes: a second centrifugal block and a third centrifugal block, the second centrifugal block being installed on the side of the first sub-centrifugal block facing the second sub-centrifugal block, the third centrifugal block being installed on the side of the second sub-centrifugal block facing the third sub-centrifugal block, and the outer peripheral surface of the flange being provided with a clearance notch to avoid the second centrifugal block and the third centrifugal block.

[0016] According to some embodiments of the present invention, the centrifugal pendulum assembly further includes: a buffer member located between the second centrifugal block and the inner wall of the clearance notch and between the third centrifugal block and the inner wall of the clearance notch; the buffer member is provided with a receiving groove, the inner wall of the receiving groove is provided with a retaining platform, the second centrifugal block and the third centrifugal block are both provided with retaining slots, the second centrifugal block and the third centrifugal block extend into the receiving groove, and the retaining platform is inserted into the retaining slot of the second centrifugal block and the retaining slot of the third centrifugal block.

[0017] According to some embodiments of the present invention, the dimension of the buffer element in the circumferential direction of the flange gradually decreases radially inward along the flange.

[0018] According to some embodiments of the present invention, the centrifugal pendulum assembly further includes: a limiting member, the limiting member being installed on the flange and having both ends protruding from the axial sides of the flange respectively, the limiting member being located between the first sub-centrifugal block and the second sub-centrifugal block.

[0019] According to some embodiments of the present invention, there are multiple limiting members, including a first limiting member and a second limiting member, wherein the first limiting member and the second limiting member are respectively disposed adjacent to both ends of the first centrifugal block.

[0020] According to some embodiments of the present invention, there are multiple guide slides, including a first guide slide and a second guide slide, wherein the first guide slide and the second guide slide are respectively disposed adjacent to both ends of the first centrifugal block.

[0021] According to some embodiments of the present invention, the first centrifugal blocks are a plurality of blocks spaced circumferentially along the flange.

[0022] According to some embodiments of the present invention, the vibration damper further includes: a pad block connected to the mass disk and located between the mass disk and the centrifugal pendulum assembly; a support disk connected to the side of the pad block facing away from the mass disk, the centrifugal pendulum assembly being sleeved on the support disk; and an elastic friction washer sleeved on the outer peripheral surface of the support disk and clamped between the centrifugal pendulum assembly and the pad block.

[0023] According to some embodiments of the present invention, the torque limiting assembly includes: a transmission connection portion adapted to be transmissionally connected to the gearbox; and a first friction plate connected to the side of the transmission connection portion facing the flange and fitting against the flange.

[0024] According to some embodiments of the present invention, the vibration damper further includes: a metal sheet, the metal sheet being abutted against the side of the torsion limiting assembly opposite to the centrifugal pendulum assembly, and a second friction plate being provided between the metal sheet and the torsion limiting assembly; a disc spring, one end of the disc spring abutting against the side of the metal sheet opposite to the torsion limiting assembly; and a fixed bracket, the fixed bracket abutting against the other end of the disc spring and connected to the flange.

[0025] According to some embodiments of the present invention, the vibration damper further includes: a diaphragm spring abutting against the side of the fixed bracket opposite to the disc spring; a sealing ring, one end of which abuts against the side of the diaphragm spring opposite to the fixed bracket; and a cover plate abutting against the other end of the sealing ring and connected to the mass plate.

[0026] According to a second aspect of the present invention, a powertrain is provided, comprising: an engine and a transmission; and a shock absorber as described in a first aspect of the present invention.

[0027] According to a second aspect embodiment of the powertrain, by utilizing the damper described in the first aspect embodiment of the invention, not only can the torque limiting function be achieved, but it also has advantages such as good damping effect and smooth torque transmission.

[0028] According to a third aspect of the present invention, a vehicle is provided, including the powertrain described in a second aspect of the present invention.

[0029] The vehicle according to the third aspect embodiment of the present invention, by utilizing the powertrain described in the second aspect embodiment of the present invention, can not only achieve torque limiting function, but also has advantages such as good vibration reduction effect and smooth torque transmission.

[0030] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0031] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0032] Figure 1 This is an exploded view of a vibration damper according to an embodiment of the present invention.

[0033] Figure 2 This is a cross-sectional view of a vibration damper according to an embodiment of the present invention.

[0034] Figure 3 This is a schematic diagram of the centrifugal pendulum assembly of a vibration damper according to an embodiment of the present invention.

[0035] Figure 4 This is an exploded view of the centrifugal pendulum assembly of a vibration damper according to an embodiment of the present invention.

[0036] Figure 5 This is a schematic diagram of the structure of the buffer component of the vibration damper according to an embodiment of the present invention.

[0037] Figure 6 This is a schematic diagram of the structure of the third centrifugal block of the vibration damper according to an embodiment of the present invention.

[0038] Figure label:

[0039] Vibration damper 1

[0040] Mass disk 100, first rotating part 110, first rotating block 111, second rotating block 112, mounting groove 120, sliding groove structure 130, sliding groove 131, first sliding groove component 132, second sliding groove component 133.

[0041] Centrifugal pendulum assembly 200, flange 210, second rotating part 211, first rotating lug 212, second rotating lug 213, first slide rail 214, clearance notch 215.

[0042] First centrifuge block 220, second slide 221, first sub-centrifuge block 212, second sub-centrifuge block 213

[0043] Guide slide 230, first guide slide 231, second guide slide 232

[0044] Second centrifuge block 240, third centrifuge block 250, slot 251

[0045] Buffer component 260, receiving groove 261, locking platform 262, limiting component 270, first limiting component 271, second limiting component 272.

[0046] Vibration damping elastic element 300, first vibration damping elastic element 310, second vibration damping elastic element 320

[0047] Torque limiting assembly 400, transmission connection part 410, first friction plate 420, second friction plate 430

[0048] Pad 500, support plate 510, elastic friction washer 520

[0049] Metal sheet 600, disc spring 700, fixed bracket 800, diaphragm spring 900, sealing ring 910, cover plate 920. Detailed Implementation

[0050] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0051] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0052] In the description of this invention, "a plurality of" means two or more.

[0053] The vibration damper 1 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0054] like Figures 1-6 As shown, the vibration damper 1 according to an embodiment of the present invention includes a mass disk 100, a centrifugal pendulum assembly 200, a vibration damping elastic element 300, and a torsion limiting assembly 400.

[0055] The mass disc 100 is adapted to be connected to the engine. The mass disc 100 has a first rotating part 110. The centrifugal pendulum assembly 200 includes a flange 210 and a first centrifugal block 220. The flange 210 has a second rotating part 211. When the mass disc 100 rotates, it pushes the second rotating part 211 through the first rotating part 110 to drive the flange 210 to rotate. The first centrifugal block 220 is slidably mounted on the flange 210 along the rotation direction of the flange 210. The damping elastic member 300 is located between the first rotating part 110 and the second rotating part 211. The damping elastic member 300 transmits the power to drive the flange 210 to rotate by being compressed by the first rotating part 110 and the second rotating part 211. The torque limiting assembly 400 is adapted to be connected to the gearbox. The torque limiting assembly 400 fits against the flange 210. The torque limiting assembly 400 limits the maximum torque transmitted to the gearbox by the friction between it and the flange 210.

[0056] It should be noted that the first centrifugal block 220 is slidably mounted on the flange 210 along the rotation direction of the flange 210, which means that the first centrifugal block 220 can move relative to the flange 210 in the same direction as the flange 210's rotation direction, and the first centrifugal block 220 can move relative to the flange 210 in the opposite direction of the flange 210's rotation direction.

[0057] For example, the damping elastic element 300 can be an arc spring. This makes it easy for the damping elastic element 300 to adapt to the shape of the mass disk 100, and the arc spring can stably transmit force when the mass disk 100 and the flange 210 rotate. The relative torsion angle between the mass disk 100 and the flange 210 is relatively large, and the overall vibration isolation effect of the damper 1 is better.

[0058] According to an embodiment of the present invention, the shock absorber 1 connects the mass disc 100 to the engine. When the mass disc 100 rotates, it pushes the second rotating part 211 through the first rotating part 110 to drive the flange 210 to rotate. The torque limiting component 400 is connected to the gearbox and fits against the flange 210. For example, the mass disc 100 is connected to the crankshaft of the engine, and the torque limiting component 400 is connected to the input shaft of the gearbox. In this way, the torque output by the engine can be transmitted to the gearbox through the mass disc 100, the flange 210 and the torque limiting component 400, thereby realizing the power transmission of the vehicle.

[0059] Furthermore, the torque limiting component 400 limits the maximum torque transmitted to the transmission through friction between itself and the flange 210. This ensures that the torque transmitted between the torque limiting component 400 and the flange 210 does not exceed the frictional torque between them. Therefore, the torque that can be transmitted between the engine and the transmission is the frictional torque between the torque limiting component 400 and the flange 210. If the torque output by the engine or transmission exceeds the frictional torque between the torque limiting component 400 and the flange 210, slippage will occur. By setting the torque limiting component 400, excessive torque transmission between the engine and the transmission can be avoided. In hybrid vehicles, the starting torque of the electric motor may be very high. Without the torque limiting component 400, the torque transmitted from the electric motor to the engine crankshaft could damage it. Therefore, setting the torque limiting component 400 reduces the probability of damage to the shock absorber 1, the engine, and the transmission, extending the vehicle's service life.

[0060] In addition, when the mass disc 100 rotates, it drives the second rotating part 211 through the first rotating part 110 to drive the flange 210 to rotate. The damping elastic element 300 is located between the first rotating part 110 and the second rotating part 211. The damping elastic element 300 transmits the power to drive the flange 210 to rotate by being compressed by the first rotating part 110 and the second rotating part 211. In this way, the damping elastic element 300 can not only transmit power between the first rotating part 110 and the second rotating part 211, that is, realize the power transmission between the mass disc 100 and the flange 210, but also absorb the vibration caused by sudden changes in the rotation speed of the mass disc 100 or the flange 210 (such as rapid acceleration, deceleration or sudden stop of the vehicle), thereby making the torque transmission between the engine and the transmission smoother and generating less noise.

[0061] Furthermore, the first centrifugal block 220 is slidably mounted on the flange 210 along the rotation direction of the flange 210. Thus, when the rotational speed of the flange 210 changes, the first centrifugal block 220 will move in the opposite direction of the acceleration of the flange 210 due to inertia, thereby suppressing the change in the rotational speed of the flange 210, and further suppressing the change in the rotational speed of the mass disc 100, the torque limiting component 400, the engine and the gearbox, further reducing the vibration of the mass disc 100, the torque limiting component 400, the engine and the gearbox, making the torque transmission between the engine and the gearbox smoother and generating less noise.

[0062] Thus, the damper 1 according to the embodiment of the present invention can not only realize the torque limiting function, but also has the advantages of good damping effect and smooth torque transmission.

[0063] According to some specific embodiments of the present invention, such as Figure 1As shown, the mass disk 100 has a mounting groove 120 on the side facing the centrifugal pendulum assembly 200. The first rotating part 110 is disposed in the mounting groove 120 and includes a first rotating block 111 and a second rotating block 112 that are spaced apart along the circumference of the mass disk 100. At least a portion of the second rotating part 211 is located in the mounting groove 120 and includes a first rotating ear 212 and a second rotating ear 213 that are spaced apart along the circumference of the flange 210.

[0064] The vibration damping elastic element 300 is multiple and includes a first vibration damping elastic element 310 and a second vibration damping elastic element 320. A first rotating block 111 and a second rotating ear 213 are provided between one end of the first vibration damping elastic element 310 and one end of the second vibration damping elastic element 320. A second rotating block 112 and a first rotating ear 212 are provided between the other end of the first vibration damping elastic element 310 and the other end of the second vibration damping elastic element 320.

[0065] The first rotating part 110 and the second rotating part 211 are offset axially in the damper 1, meaning that even if the mass disk 100 and the flange 210 are relative to each other for 360°, the first rotating part 110 and the second rotating part 211 will not interfere with each other. Furthermore, the first damping elastic element 310 and the second damping elastic element 320 overlap with the first rotating block 111, the second rotating block 112, the first rotating ear 212, and the second rotating ear 213 axially in the damper 1. This means that during the relative movement of the mass disk 100 and the flange 210, all of the first rotating blocks 111, 112, 212, and 213 can contact the first damping elastic element 310 and the second damping elastic element 320.

[0066] Assuming that during the rotation of flange 210 relative to mass disk 100 in the first direction, the two ends of the first damping elastic element 310 abut against the first rotating ear 212 and the first rotating block 111 respectively, and the two ends of the second damping elastic element 320 abut against the second rotating ear 213 and the second rotating block 112 respectively, then during the rotation of flange 210 relative to mass disk 100 in the second direction, the two ends of the second damping elastic element 320 abut against the first rotating ear 212 and the first rotating block 111 respectively, and the two ends of the first damping elastic element 310 abut against the second rotating ear 213 and the second rotating block 112 respectively, wherein the first direction and the second direction are opposite directions in the circumferential direction of the damper 1.

[0067] In this way, no matter how the flange 210 and the mass disk 100 rotate relative to each other, the power transmission between the flange 210 and the mass disk 100 can be realized, and the vibration reduction effect can be generated. In addition, two vibration damping elastic elements 300 are set to increase the vibration damping effect and stabilize the force transmission.

[0068] According to some specific embodiments of the present invention, such as Figure 1As shown, a groove structure 130 is provided on the side of the mass disk 100 facing the centrifugal pendulum assembly 200. The groove structure 130 is constructed with a groove 131 extending circumferentially along the mass disk 100, and a vibration damping elastic member 300 is disposed within the groove 131 of the groove structure 130. The vibration damping elastic member 300 can fit against the inner wall of the groove 131, and the groove 131 can guide the movement of the vibration damping elastic member 300, causing the vibration damping elastic member 300 to move along a specified arc trajectory within the mass block.

[0069] Optionally, the opening of the groove 131 of the groove structure 130 faces the axis of the mass disk 100. In this way, the vibration damping elastic element 300 is less likely to detach from the groove 131, eliminating the need for an additional sealing structure, reducing the number of parts, and lowering cost and weight.

[0070] Furthermore, a mounting groove 120 is provided on the side of the mass disk 100 facing the centrifugal pendulum assembly 200. The first rotating part 110 is disposed in the mounting groove 120 and includes a first rotating block 111 and a second rotating block 112 spaced apart along the circumference of the mass disk 100. There are multiple sliding groove structures 130, including a first sliding groove member 132 and a second sliding groove member 133. One end of the first sliding groove member 132 and one end of the second sliding groove member 133 abut against both sides of the first rotating block 111 in the circumference of the mass disk 100. The other end of the first sliding groove member 132 and the other end of the second sliding groove member 133 abut against both sides of the second rotating block 112 in the circumference of the mass disk 100.

[0071] For example, the chute structure 130 and the mass disk 100 can be separately arranged. The first rotating block 111 and the second rotating block 112 can limit the position of the first chute member 132 and the second chute member 133 in the circumferential direction of the mass disk 100. The first chute member 132 and the second chute member 133 do not exceed the first rotating block 111 and the second rotating block 112 in the axial direction of the mass disk 100. That is, when the flange 210 rotates relative to the mass disk 100, the first chute member 132 and the second chute member 133 will not come into contact with the flange 210.

[0072] In this way, the first sliding groove 132 can provide guidance for the first damping elastic element 310, and the second sliding groove 133 can provide guidance for the second damping elastic element 320, making the force transmission of the damper 1 more stable.

[0073] According to some specific embodiments of the present invention, such as Figure 3 and Figure 4 As shown, the centrifugal pendulum assembly 200 also includes a guide slide 230, the flange 210 is provided with a first slide 214 extending in its rotation direction, the first centrifugal block 220 is provided with a second slide 221 extending in the rotation direction of the flange 210, and the guide slide 230 passes through the first slide 214 and the second slide 221.

[0074] It should be noted that the rotation direction of flange 210 is circumferential. The first slide 214 and the second slide 221 extend circumferentially along flange 210 and fluctuate radially. That is, the distance between the center line of the first slide 214 and the center of flange 210 is not constant, and the distance between the center line of the second slide 221 and the center of flange 210 is not constant. Thus, when the first centrifugal block 220 slides relative to flange 210, it will produce a centrifugal effect.

[0075] This not only enables relative sliding between flange 210 and the first centrifugal block 220, but also ensures a stable connection between flange 210 and the first centrifugal block 220.

[0076] The guide slides 230 are multiple, including a first guide slide 231 and a second guide slide 232, which are respectively located near both ends of the first centrifugal block 220. In this way, both ends of the first centrifugal block 220 are fixed to the flange 210, preventing relative rotation between the first centrifugal block 220 and the flange 210 around the guide slides 230. This results in a more stable relative position between the first centrifugal block 220 and the flange 210, and smoother sliding of the first centrifugal block 220 relative to the flange 210.

[0077] Furthermore, the first centrifugal block 220 includes a first sub-centrifugal block 212 and a second sub-centrifugal block 213 connected together. The first sub-centrifugal block 212 and the second sub-centrifugal block 213 are respectively disposed on both sides of the flange 210 and clamp the flange 210. The first sub-centrifugal block 212 and the second sub-centrifugal block 213 are both provided with a second slide rail 221. The guide slide column 230 passes through the first slide rail 214, the second slide rail 221 of the first sub-centrifugal block 212 and the second slide rail 221 of the second sub-centrifugal block 213.

[0078] For example, the guide slide 230 can be divided into three sections. The diameter of the middle section of the guide slide 230 is larger than the diameter of the two end sections of the guide slide 230. The middle section of the guide slide 230 extends into the first slide rail 214. The two end sections of the guide slide 230 extend into the second slide rail 221 of the first sub-centrifugal block 212 and the second slide rail 221 of the second sub-centrifugal block 213, respectively. The middle section of the guide slide 230 is fixed to the flange 210.

[0079] In this way, the first centrifugal block 220 is more evenly distributed on both sides of the flange 210, and since the two ends of the guide slide 230 move relative to the flange 210 at the same time, the guide slide 230 will not deflect relative to the flange 210, the relative position of the first centrifugal block 220 and the flange 210 is more stable, and the sliding of the first centrifugal block 220 relative to the flange 210 is smoother.

[0080] Optionally, the centrifugal pendulum assembly 200 further includes a second centrifugal block 240 and a third centrifugal block 250. The second centrifugal block 240 is installed on the side of the first sub-centrifugal block 212 facing the second sub-centrifugal block 213, and the third centrifugal block 250 is installed on the side of the second sub-centrifugal block 213 facing the third sub-centrifugal block. The outer peripheral surface of the flange 210 is provided with a clearance notch 215 to avoid the second centrifugal block 240 and the third centrifugal block 250.

[0081] Thus, the arrangement of the second centrifugal block 240 and the third centrifugal block 250 increases the overall mass of the first centrifugal block 220, the second centrifugal block 240, and the third centrifugal block 250, thereby increasing their kinetic inertia. This more effectively prevents changes in the rotational speed of the flange 210, ensuring a small vibration amplitude in the damper 1, and consequently reducing the vibration of the transmission system, thus ensuring reliable torque transmission. Furthermore, the avoidance notch 215 reduces the probability of collisions between the second centrifugal block 240 and the third centrifugal block 250 and the flange 210, ensuring smooth movement of the second centrifugal block 240 and the third centrifugal block 250.

[0082] Furthermore, such as Figures 4-6 As shown, the centrifugal pendulum assembly 200 also includes a buffer 260, which is located between the inner wall of the second centrifugal block 240 and the clearance notch 215, and between the inner wall of the third centrifugal block 250 and the clearance notch 215. The buffer 260 is provided with a receiving groove 261, and the inner wall of the receiving groove 261 is provided with a locking platform 262. Both the second centrifugal block 240 and the third centrifugal block 250 are provided with locking slots 251. The second centrifugal block 240 and the third centrifugal block 250 extend into the receiving groove 261, and the locking platform 262 is inserted into the locking slots 251 of the second centrifugal block 240 and the third centrifugal block 250.

[0083] For example, the buffer 260 can be a rubber part. The second centrifugal block 240 and the third centrifugal block 250 can contact the flange 210 through the buffer 260. On the one hand, it can prevent the second centrifugal block 240 and the third centrifugal block 250 from colliding with the flange 210 when they move in the opposite direction. The buffer 260 can form a buffer between the second centrifugal block 240 and the third centrifugal block 250 and the flange 210. On the other hand, it can ensure that the first centrifugal block 220, the second centrifugal block 240 and the third centrifugal block 250 can act on the flange 210 to prevent the rotational speed of the flange 210 from changing, and ensure the rotational stability of the shock absorber 1, thereby ensuring the stable transmission of torque between the engine and the gearbox.

[0084] In addition, the arrangement of the card platform 262 and the card slot 251 ensures that the connection between the buffer 260, the second centrifugal block 240 and the third centrifugal block 250 is stable and reliable.

[0085] Specifically, such as Figure 5 As shown, the dimension of the buffer 260 in the circumferential direction of the flange 210 gradually decreases inward along the radial direction of the flange 210.

[0086] This design results in a large contact area between the buffer element 260 and the second centrifugal block 240 and the third centrifugal block 250, ensuring a high connection strength and stable connection. Furthermore, the small contact area between the buffer element 260 and the flange 210 reduces frictional resistance, facilitating movement of the first centrifugal block 220, the second centrifugal block 240, and the third centrifugal block 250 relative to the flange 210, and allowing for a closer fit between the arc-shaped surfaces of the buffer element 260 and the flange 210. Additionally, the equal central angles on the opposite sides of the buffer element 260 facilitate assembly with the flange 210.

[0087] In some embodiments of the present invention, such as Figure 4 As shown, the centrifugal pendulum assembly 200 also includes a limiting member 270, which is installed on the flange 210 and protrudes from both ends of the flange 210 along its axial direction. The limiting member 270 is located between the first sub-centrifugal block 212 and the second sub-centrifugal block 213. The limiting member 270 can be made of plastic.

[0088] In this way, the limiting member 270 can prevent the first sub-centrifugal block 212 from fitting together with the flange 210 and can prevent the second sub-centrifugal block 213 from fitting together with the flange 210, thereby avoiding collision between the first sub-centrifugal block 212 and the second sub-centrifugal block 213 and the flange 210.

[0089] Furthermore, there are multiple limiting members 270, including a first limiting member 271 and a second limiting member 272, with the first limiting member 271 and the second limiting member 272 respectively disposed adjacent to both ends of the first centrifugal block 220.

[0090] In this way, on the one hand, the limiting member 270 blocks the first centrifugal block 220 more evenly, avoiding the first centrifugal block 220 from deflecting when blocked by the limiting member 270, which would cause the first centrifugal block 220 to collide with the flange 210. On the other hand, it can reduce the collision force borne by each of the first limiting member 271 and the second limiting member 272 individually, and extend the service life of the first limiting member 271 and the second limiting member 272.

[0091] Optionally, such as Figure 3As shown, multiple first centrifugal blocks 220 are arranged at intervals along the circumference of the flange 210. These multiple first centrifugal blocks 220 can be arranged symmetrically with respect to the axis of the flange 210 to prevent uneven radial stress on the flange 210 over time, thus avoiding damage. Furthermore, the multiple first centrifugal blocks 220 can collectively limit the acceleration changes of the flange 210, thereby better mitigating the rate of change of the flange 210's rotational speed, reducing the vibration of the damper 1 and the transmission system, and making the torque transmission of the transmission system smoother.

[0092] According to some specific embodiments of the present invention, such as Figure 1 and Figure 2 As shown, the shock absorber 1 also includes a pad 500, a support plate 510, and an elastic friction washer 520. The pad 500 is connected to the mass plate 100 and located between the mass plate 100 and the centrifugal pendulum assembly 200. The support plate 510 is connected to the side of the pad 500 facing away from the mass plate 100. The centrifugal pendulum assembly 200 is sleeved on the support plate 510. The elastic friction washer 520 is sleeved on the outer peripheral surface of the support plate 510 and is clamped between the centrifugal pendulum assembly 200 and the pad 500.

[0093] For example, the pad 500 and the support plate 510 can be riveted to the mass plate 100. The pad 500 can increase the axial distance between the mass plate 100 and the flange 210 in the damper 1, thereby preventing the first rotating part 110 and the second rotating part 211 from colliding. Furthermore, the elastic friction washer 520 and the support plate 510 are fixed in relative position in the circumferential direction of the support plate 510. The elastic friction washer 520 is clamped between the centrifugal pendulum assembly 200 and the pad 500. On the one hand, it can further increase the distance between the mass plate 100 and the flange 210 in the axial direction of the damper 1, so as to better avoid the collision between the first rotating part 110 and the second rotating part 211. On the other hand, the elastic friction washer 520 can provide a damping force between the pad 500 and the flange 210, which can prevent the flange 210 and the mass plate 100 from shaking too much when the vehicle is idling. This avoids the repeated separation and contact between the damping elastic element 300 and the flange 210, which would generate impact noise. That is, it ensures that the damping elastic element 300 and the flange 210 are continuously in contact, thus optimizing the NVH (Noise, Vibration, Harshness) performance of the vehicle.

[0094] According to some specific embodiments of the present invention, such as Figure 1 and Figure 2As shown, the torque limiting assembly 400 includes a transmission connection portion 410 and a first friction plate 420. The transmission connection portion 410 is adapted to be connected to the gearbox, and the first friction plate 420 is connected to the side of the transmission connection portion 410 facing the flange 210 and fits against the flange 210. The transmission connection portion 410 can be a splined hub, which has splines that are connected to the input shaft of the gearbox.

[0095] In other words, the first friction plate 420 is located between the transmission connection part 410 and the flange 210 to achieve synchronous rotation between the transmission connection part 410 and the flange 210. The first friction plate 420 can be installed on the transmission connection part 410 by threaded fasteners. Since the flange 210 and the transmission connection part 410 achieve synchronous rotation through friction torque, that is, when the torque transmitted between the flange 210 and the transmission connection part 410 is not greater than the friction torque between the flange 210 and the first friction plate 420, the flange 210 and the first friction plate 420 rotate synchronously. When the torque transmitted between the flange 210 and the transmission connection part 410 is greater than the friction torque between the metal plate 600 and the first friction plate 420, the flange 210 and the first friction plate 420 rotate relative to each other.

[0096] In this way, the maximum torque that can be transmitted between flange 210 and transmission connection part 410 is also the frictional torque between flange 210 and transmission connection part 410. The torque that can be transmitted between flange 210 and transmission connection part 410 will not increase continuously with the increase of the input torque. Flange 210 and transmission connection part 410 have a torque limiting function, thereby avoiding excessive torque that could damage the engine crankshaft.

[0097] According to some specific embodiments of the present invention, such as Figure 1 and Figure 2 As shown, the shock absorber 1 also includes a metal sheet 600 (e.g., a steel sheet), a disc spring 700, and a fixed bracket 800. The metal sheet 600 is attached to the side of the torsion limiting assembly 400 facing away from the centrifugal pendulum assembly 200. A second friction plate 430 is provided between the metal sheet 600 and the torsion limiting assembly 400. One end of the disc spring 700 abuts against the side of the metal sheet 600 facing away from the torsion limiting assembly 400. The fixed bracket 800 abuts against the other end of the disc spring 700 and is connected to the flange 210.

[0098] In other words, the fixed bracket 800 and the flange 210 together clamp the disc spring 700, the metal plate 600, and the torque limiting assembly 400. The second friction plate 430 is located between the transmission connection part 410 and the metal plate 600 to achieve synchronous rotation between the transmission connection part 410 and the metal plate 600. The second friction plate 430 can be installed on the transmission connection part 410 by threaded fasteners. Since the metal plate 600 and the transmission connection part 410 also achieve synchronous rotation through friction torque, that is, when the torque transmitted between the metal plate 600 and the transmission connection part 410 is greater than the friction torque between the metal plate 600 and the second friction plate 430, the metal plate 600 and the second friction plate 430 rotate synchronously. When the torque transmitted between the metal plate 600 and the transmission connection part 410 is greater than the friction torque between the metal plate 600 and the second friction plate 430, the metal plate 600 and the second friction plate 430 rotate relative to each other.

[0099] In this way, the metal sheet 600 and the transmission connection part 410 also have a torque limiting function. Therefore, when the torque limiting function between the transmission connection part 410 and the flange 210 fails, the connection between the metal sheet 600 and the transmission connection part 410 can play a torque limiting role, thereby improving the torque limiting reliability of the shock absorber 1.

[0100] In addition, the disc spring 700 can undergo elastic deformation in its axial direction. When the fixed bracket 800 is fixed to the flange 210, the disc spring 700 can undergo elastic deformation to make the metal plate 600, the torsion limiting component 400 and the flange 210 fit more tightly, avoid gaps between the metal plate 600, the torsion limiting component 400 and the flange 210, and thus ensure the normal realization of the torsion limiting function of the torsion limiting component 400 and the flange 210.

[0101] For example, the fixed bracket 800 has multiple connecting feet along its circumference. The multiple connecting feet surround the disc spring 700, the metal plate 600 and the torsion limiting assembly 400 and pass through the flange 210. Each connecting foot is riveted to the flange 210 to ensure a stable connection.

[0102] Furthermore, such as Figure 1 and Figure 2 As shown, the shock absorber 1 also includes a diaphragm spring 900, a sealing ring 910, and a cover plate 920. The diaphragm spring 900 abuts against the side of the fixed bracket 800 opposite to the disc spring 700. One end of the sealing ring 910 abuts against the side of the diaphragm spring 900 opposite to the fixed bracket 800. The cover plate 920 abuts against the other end of the sealing ring 910 and is connected to the mass plate 100.

[0103] For example, the diaphragm spring 900 can be mounted on the side of the fixed bracket 800 opposite to the disc spring 700 by threaded fasteners (e.g., bolts), and the sealing ring 910 is held by the diaphragm spring 900 and the cover plate 920. The cover plate 920 and the mass plate 100 can be welded together (e.g., laser welded).

[0104] On the one hand, the sealing ring 910 undergoes elastic deformation, which can seal the gap between the diaphragm spring 900 and the cover plate 920, thereby improving the sealing performance of the damper 1. The damping elastic element 300 and the mass plate 100 need to be lubricated with lubricating oil to reduce the excessive friction force when the damping elastic element 300 and the mass plate 100 move relative to each other, thereby reducing the probability of damage to the damping elastic element 300 and the mass plate 100. The sealing ring 910 can prevent the lubricating oil in the damper from leaking between the diaphragm spring 900 and the cover plate 920.

[0105] On the other hand, the sealing ring 910 can provide a damping force between the diaphragm spring 900 and the cover plate 920, which can prevent the flange 210 and the mass plate 100 from vibrating too much when the vehicle is idling. This avoids the repeated separation and contact between the damping elastic element 300 and the flange 210, which would generate impact noise. In other words, it ensures that the damping elastic element 300 and the flange 210 are in continuous contact, thus optimizing the vehicle's NVH (Noise, Vibration, Harshness) performance.

[0106] It should be noted that, since the transmission connection part 410 needs to be connected to the input shaft of the transmission, the metal plate 600, disc spring 700, fixed bracket 800, diaphragm spring 900, sealing ring 910 and cover plate 920 are all sleeved on the input shaft.

[0107] The powertrain according to an embodiment of the present invention is described below with reference to the accompanying drawings. The powertrain includes an engine, a transmission, and a shock absorber 1 according to the above embodiment of the present invention.

[0108] The powertrain according to the embodiments of the present invention, by utilizing the damper 1 according to the above embodiments of the present invention, can not only achieve the torque limiting function, but also has the advantages of good vibration reduction effect and smooth torque transmission.

[0109] The following description, with reference to the accompanying drawings, describes a vehicle according to an embodiment of the present invention, the vehicle including a powertrain according to the above embodiments of the present invention. The vehicle may be a hybrid vehicle.

[0110] The vehicle according to the embodiments of the present invention, by utilizing the powertrain according to the above embodiments of the present invention, can not only achieve torque limiting function, but also has advantages such as good vibration reduction effect and smooth torque transmission.

[0111] The shock absorber 1, powertrain, and other components and operations of the vehicle according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0112] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0113] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A vibration damper, characterized in that, include: A mass disk adapted to be connected to an engine, the mass disk having a first rotating portion; A centrifugal pendulum assembly includes a flange and a first centrifugal block. The flange has a second rotating part. When the mass disk rotates, the first rotating part pushes the second rotating part to drive the flange to rotate. The first centrifugal block is slidably mounted on the flange along the rotation direction of the flange. A vibration damping elastic element is located between the first rotating part and the second rotating part. The vibration damping elastic element is compressed by the first rotating part and the second rotating part to transmit the power to drive the flange to rotate. A torque limiting assembly, adapted to be connected to a gearbox, the torque limiting assembly being fitted with the flange, the torque limiting assembly limiting the maximum torque transmitted to the gearbox through frictional force between the torque limiting assembly and the flange; The torque limiting component includes: A transmission connection portion, the transmission connection portion being adapted to be connected to the gearbox in a transmission connection; A first friction plate is connected to the side of the transmission connection portion facing the flange and is in contact with the flange.

2. The vibration damper according to claim 1, characterized in that, The mass disk has a mounting groove on the side facing the centrifugal pendulum assembly; The first rotating part is disposed in the mounting groove and includes a first rotating block and a second rotating block that are spaced apart along the circumference of the mass disk. At least a portion of the second rotating part is located within the mounting groove and includes a first rotating lug and a second rotating lug spaced apart circumferentially along the flange; The vibration damping elastic element is a plurality of elements, including a first vibration damping elastic element and a second vibration damping elastic element. A first rotating block and a second rotating ear are provided between one end of the first vibration damping elastic element and one end of the second vibration damping elastic element. A second rotating block and a first rotating ear are provided between the other end of the first vibration damping elastic element and the other end of the second vibration damping elastic element. The first rotating part and the second rotating part are offset in the axial direction of the damper, and the first damping elastic element and the second damping elastic element overlap with the first rotating block, the second rotating block, the first rotating ear and the second rotating ear in the axial direction of the damper.

3. The vibration damper according to claim 1, characterized in that, The mass disk has a groove structure on the side facing the centrifugal pendulum assembly. The groove structure has a groove extending circumferentially along the mass disk, and the vibration damping elastic element is disposed in the groove of the groove structure.

4. The vibration damper according to claim 3, characterized in that, The opening of the groove in the groove structure faces the axis of the mass disk.

5. The vibration damper according to claim 4, characterized in that, The mass disk has a mounting groove on the side facing the centrifugal pendulum assembly; The first rotating part is disposed in the mounting groove and includes a first rotating block and a second rotating block that are spaced apart along the circumference of the mass disk. The slide structure comprises multiple slide members, including a first slide member and a second slide member. One end of the first slide member and one end of the second slide member abut against both sides of the first rotating block in the circumferential direction of the mass disk. The other end of the first slide member and the other end of the second slide member abut against both sides of the second rotating block in the circumferential direction of the mass disk.

6. The vibration damper according to claim 1, characterized in that, The vibration damping elastic element is an arc spring.

7. The vibration damper according to claim 1, characterized in that, The centrifugal pendulum assembly also includes: The guide slide column is provided with a first slide extending in the direction of rotation of the flange, and the first centrifugal block is provided with a second slide extending in the direction of rotation of the flange. The guide slide column passes through the first slide and the second slide.

8. The vibration damper according to claim 7, characterized in that, The first centrifugal block includes a first sub-centrifugal block and a second sub-centrifugal block connected together. The first sub-centrifugal block and the second sub-centrifugal block are respectively disposed on both sides of the flange and clamp the flange. Both the first sub-centrifugal block and the second sub-centrifugal block are provided with a second slide rail. The guide slide rod passes through the first slide rail, the second slide rail of the first sub-centrifugal block and the second slide rail of the second sub-centrifugal block.

9. The vibration damper according to claim 8, characterized in that, The centrifugal pendulum assembly also includes: The second centrifugal block and the third centrifugal block are installed on the side of the first sub-centrifugal block facing the second sub-centrifugal block, and the third centrifugal block is installed on the side of the second sub-centrifugal block facing the first sub-centrifugal block. The outer peripheral surface of the flange is provided with a clearance notch to avoid the second centrifugal block and the third centrifugal block.

10. The vibration damper according to claim 9, characterized in that, The centrifugal pendulum assembly also includes: A buffer is provided, which is located between the second centrifugal block and the inner wall of the clearance notch, and between the third centrifugal block and the inner wall of the clearance notch. The buffer is provided with a receiving groove, and the inner wall of the receiving groove is provided with a locking platform. The second centrifugal block and the third centrifugal block are both provided with locking slots. The second centrifugal block and the third centrifugal block extend into the receiving groove, and the locking platform is inserted into the locking slot of the second centrifugal block and the locking slot of the third centrifugal block.

11. The vibration damper according to claim 10, characterized in that, The dimension of the buffer element in the circumferential direction of the flange gradually decreases radially inward from the flange.

12. The vibration damper according to claim 8, characterized in that, The centrifugal pendulum assembly also includes: A limiting member is installed on the flange and its two ends protrude from the axial sides of the flange, and the limiting member is located between the first sub-centrifugal block and the second sub-centrifugal block.

13. The vibration damper according to claim 12, characterized in that, The limiting member is multiple and includes a first limiting member and a second limiting member, with the first limiting member and the second limiting member respectively disposed adjacent to both ends of the first centrifugal block.

14. The vibration damper according to claim 7, characterized in that, The guide slide is a plurality of slides, including a first guide slide and a second guide slide, wherein the first guide slide and the second guide slide are respectively disposed adjacent to the two ends of the first centrifugal block.

15. The vibration damper according to claim 1, characterized in that, The first centrifugal blocks are multiple blocks spaced apart circumferentially along the flange.

16. The vibration damper according to claim 1, characterized in that, Also includes: A pad, the pad being connected to the mass disk and located between the mass disk and the centrifugal pendulum assembly; A support plate is connected to the side of the pad facing away from the mass plate, and the centrifugal pendulum assembly is sleeved on the support plate; An elastic friction washer is sleeved on the outer peripheral surface of the support disk and clamped between the centrifugal pendulum assembly and the pad.

17. The vibration damper according to claim 1, characterized in that, Also includes: A metal sheet is attached to the side of the torsion limiting assembly that is opposite to the centrifugal pendulum assembly, and a second friction plate is provided between the metal sheet and the torsion limiting assembly. A disc spring, one end of which abuts against the side of the metal sheet opposite to the torsion limiting assembly; A fixed bracket is abutted against the other end of the disc spring and connected to the flange.

18. The vibration damper according to claim 17, characterized in that, Also includes: A diaphragm spring, the diaphragm spring being abutted against the side of the fixed bracket opposite to the disc spring; A sealing ring, one end of which abuts against the side of the diaphragm spring facing away from the fixed bracket; A cover plate, which abuts against the other end of the sealing ring and is connected to the mass plate.

19. A powertrain, characterized in that, include: Engine and transmission; The vibration damper according to any one of claims 1-18.

20. A vehicle, characterized in that, Including the powertrain as described in claim 19.

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