Compact torsion-limiting shock absorber

Abstract

The invention relates to the technical field of automobile clutches, in particular to a compact torsion limiting damper which comprises a pressing plate used for friction transmission and a driven disc arranged in the middle of the pressing plate, a connecting piece is arranged on the outer side of the driven disc, and the driven disc is connected with an inner ring of the pressing plate through the connecting piece to form a friction transmission structure. According to the damping device, the adaptive block slides in the compression area of the adaptive cylinder and is matched with the elastic piece to stretch out and draw back to absorb and buffer vibration energy, and on the basis, the damping effect is greatly improved, and the damping effect of the damping device is improved. The damping medium filled in the compression gap further absorbs the compression energy of the elastic piece, and the dual functions of the elastic buffer layer and the damping adjusting layer of the auxiliary damping part realize more comprehensive and fine absorption and adjustment of vibration, so that multiple damping mechanisms are formed, the damping effect is greatly improved, a transmission system runs more stably, and the service life of the transmission system is prolonged. And the vibration of different intensities and frequencies can be adapted.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile clutches, in particular to a compact torque limiting vibration damper. Background Art

[0002] like Figure 1 As shown in the figure, traditional springs and hydraulic dampers need to be stacked axially, resulting in a total shock absorber length generally exceeding 80-120mm (for example, the shock absorber module of the Volkswagen DQ200 dual-clutch is 110mm long), which squeezes the axial space of the gearbox. In addition, the coil spring or diaphragm spring needs to reserve deformation space, resulting in an increase of 20%-30% in the outer diameter of the clutch driven plate. In hybrid vehicles, the motor, clutch and gearbox need to be arranged coaxially. If the shock absorber is too large, the axial length of the assembly will exceed the standard. Due to space limitations, a large damping oil chamber cannot be arranged, resulting in a decrease in the damping coefficient of the hydraulic system, which can easily cause dynamic balance problems. Based on this, the present application provides a compact torque-limiting shock absorber. Summary of the Invention

[0003] In response to the shortcomings of the existing technology, the present invention provides a compact torsion-limiting shock absorber, which solves the problem in the existing technology that the shock absorber is too large, resulting in an excessive axial length of the assembly, and the inability to arrange a large-sized damping oil chamber due to space limitations, resulting in a reduced damping coefficient of the hydraulic system.

[0004] The compact torque-limiting vibration damper of the present invention comprises a pressure plate for friction transmission and a driven disc arranged in the middle of the pressure plate. A connecting piece is provided on the outer side of the driven disc and is connected to the inner ring of the pressure plate through the connecting piece to form a friction transmission structure. A vibration damper disc is installed in the middle of the driven disc. The damper disc is provided with a connecting shaft hole in the middle of the disc body for connecting the transmission shaft. The damper disc body is provided with one or more accommodating cavities distributed in a circular array around the connecting shaft hole. A vibration damping assembly is installed inside the accommodating cavity for reducing the vibration of the damper. The vibration damping assembly includes an adapter tube and a prefabricated adapter telescopic rod. One end of the adapter tube is connected to one side of the inner wall of the accommodating cavity, and the opposite side is fixed to one end of the telescopic rod.

[0005] As a further improvement of the present invention, a compression area is opened on the inner side of the adapter cylinder, and an adapter block is installed on the inner side of the compression area in a sliding seal. The adapter block and the inner side of the adapter cylinder form an adjustable compression gap, and a base is provided at one end of the compression gap.

[0006] As a further improvement of the present invention, an elastic member is provided on the side where the adapter block and the base are close to each other, and a fixed distance is maintained between the outer side of the elastic member and the compression gap.

[0007] As a further improvement of the present invention, through holes are provided at both sides of the base at one end of the adapter cylinder, and a cavity is formed inside the adapter cylinder extending from the through holes.

[0008] As a further improvement of the present invention, a damping medium is filled in the compression gap between the base and the adapter block to buffer the vibration caused by the compression of the elastic member.

[0009] As a further improvement of the present invention, a contact block is connected to one end of the telescopic rod close to the adapter block, and the contact block is magnetically in contact with the adapter block for damping and buffering.

[0010] As a further improvement of the present invention, the contact block includes a block body, and a clamping groove is provided on the side of the block body close to the adapter block, and a rubber strip is installed at the clamping groove.

[0011] As a further improvement of the present invention, a magnetic attraction block is provided outside the clamping groove in the middle of the block body, and the magnetic attraction block is in a repulsive or attractive state with one side of the adapter block.

[0012] As a further improvement of the present invention, an auxiliary damping part is provided inside the accommodation cavity on the outside of the damping assembly to cooperate with the damping assembly to buffer the elastic member.

[0013] As a further improvement of the present invention, a set of two symmetrically arranged convex rings are provided on the outside of the accommodation cavity to wrap the damping assembly.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: In the present invention, the adapter block slides within the compression area of the adapter cylinder, and the elastic member expands and contracts to absorb and buffer the vibration energy. On this basis, the damping medium filled in the compression gap further absorbs the compression energy of the elastic member, and the elastic buffer layer and the damping adjustment layer of the auxiliary damping part act together to achieve more comprehensive and delicate absorption and adjustment of vibration, forming a multiple damping mechanism, greatly improving the damping effect, making the transmission system operate more smoothly, and being able to adapt to vibrations of different intensities and frequencies; The adjustable compression gap allows users to flexibly adjust the size of the compression gap according to different usage scenarios and requirements, change the pre-tightening force of the elastic member, precisely control the damping characteristics of the shock absorber, improve the versatility and applicability, and the repulsive or attractive state between the magnetic attraction block on the contact block and the adapter block can be adjusted as needed to buffer and adjust the impact force at different stages, further enhancing the damping efficiency; At the same time, the damping medium plays a lubricating role during the sliding process of the adapter block, reducing the friction between the adapter block and the inner wall of the adapter cylinder, and reducing component wear; and the buffering effect of the rubber strip reduces the direct collision between the contact block and the adapter block, protects the relevant components, and extends the service life of components such as the adapter block, the adapter cylinder, and the contact block; The convex ring outside the accommodation cavity plays a role in wrapping and protecting the damping component, restricting its radial displacement, preventing excessive shaking and deviation, and at the same time preventing external dust, debris, etc. from entering the interior of the accommodation cavity, ensuring the normal working environment of the damping component and reducing the risk of component damage. Brief Description of the Drawings

[0015] The drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings: Figure 1 is a schematic three-dimensional structure diagram of the existing pressure plate of the present invention; Figure 2 is a schematic front view structure diagram of the pressure plate of the present invention; Figure 3 is a schematic front view structure diagram of the other side of the pressure plate of the present invention; Figure 4 of the present invention Figure 3 is a schematic cross-sectional structure diagram of A-A in; Figure 5 of the present invention Figure 2 is a schematic enlarged structure diagram of A in; Figure 6 is a schematic side view structure diagram of the damping component of the present invention; Figure 7 of the present invention Figure 6 is a schematic cross-sectional structure diagram of B-B in; Figure 8 is a schematic front view structure diagram of the abutting block of the present invention.

[0016] In the figure: 1. Pressure plate; 2. Driven disc; 3. Damping component; 4. Accommodation cavity; 5. Connecting shaft hole; 6. Damper disc; 7. Connecting piece; 8. Convex ring; 9. Auxiliary damping part; 31. Telescopic rod; 32. Abutting block; 33. Fitting cylinder; 34. Cavity; 35. Damping medium; 36. Through hole; 37. Base; 38. Elastic member; 39. Compression area; 321. Card slot; 322. Block body; 323. Magnetic attraction block. Detailed Embodiments

[0017] The following will disclose multiple embodiments of the present invention with illustrations. For the sake of clarity, many physical details will be described together in the following narrative. However, it should be understood that these physical details are not used to limit the present invention. That is to say, in some embodiments of the present invention, these physical details are unnecessary. In addition, for the purpose of simplifying the illustrations, some conventional structures and components will be shown in a simple schematic manner in the illustrations.

[0018] In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0019] Please refer to Figures 1-8 , traditional springs and hydraulic dampers need to be stacked axially, which makes the total length of the shock absorber generally in the range of 80 - 120 mm. This relatively long length will occupy the axial space of the transmission and have an adverse impact on the overall layout of the transmission.

[0020] When a helical spring or a diaphragm spring is working, a certain deformation space needs to be reserved. The increase in the outer diameter of the driven plate 2 may make the size of the entire clutch larger, thereby affecting the design and installation of related components.

[0021] Due to the limited space inside the vehicle, when the axial length of the assembly exceeds the standard, it is impossible to arrange a large-sized damping oil chamber. Insufficient size of the damping oil chamber will lead to a decrease in the damping coefficient of the hydraulic system. After the damping coefficient of the hydraulic system decreases, it is easy to cause dynamic balance problems, affecting the stability and reliability of hybrid vehicle models.

[0022] In view of the many problems existing in traditional springs and hydraulic dampers in ordinary applications and hybrid vehicle models, in order to overcome these shortcomings, the present application proposes to provide a compact torque-limiting shock absorber, which includes a pressure plate 1 for friction transmission and a driven plate 2 arranged in the middle of the pressure plate 1. A connecting member 7 is arranged on the outside of the driven plate 2 and is connected to the inner ring of the pressure plate 1 through the connecting member 7 to form a friction transmission structure. A shock absorber disc 6 is installed in the middle of the driven plate 2. A connecting shaft hole 5 is arranged in the middle of the disc body of the shock absorber disc 6 for connecting the transmission shaft. One or more accommodating cavities 4 are distributed in an annular array on the disc body of the shock absorber with the connecting shaft hole 5 as the center. A shock absorption component 3 is installed inside the accommodating cavity 4 for reducing the vibration of the shock absorber. The shock absorption component 3 includes an adapter cylinder 33 and a prefabricated and adapted telescopic rod 31. One end of the adapter cylinder 33 is connected to one side of the inner wall of the accommodating cavity 4, and the opposite side is fixed to one end of the telescopic rod 31.

[0023] In order to solve the problems of large axial space occupation, large outer diameter of the driven plate 2 and a series of problems caused in hybrid vehicle models existing in traditional shock absorbers, a compact torque-limiting shock absorber is designed. This shock absorber is mainly composed of a pressure plate 1 for friction transmission, a driven plate 2 arranged in the middle of the pressure plate 1, a connecting member 7, a shock absorber disc 6 and a shock absorption component 3.

[0024] The pressure plate 1 is a component that realizes friction transmission. It has a certain friction coefficient and wear resistance, and the material can be selected as an alloy material with a high friction coefficient. For example, it is made of high carbon steel (hardness HRC55 - 60), and there are radial splines on the inner ring, which mesh with the axial splines on the outer ring of the driven disk 2 through the connecting piece 7. The driven disk 2 is arranged in the middle of the pressure plate 1, and there is a connecting piece 7 on the outside of the driven disk 2. The connecting piece 7 can be multiple metal connecting pieces welded on the outside of the driven disk 2, and these connecting pieces are evenly distributed along the circumference of the driven disk 2. It is connected to the inner ring of the pressure plate 1 through the connecting piece 7. For example, when the connecting piece 7 is a copper - based powder metallurgy friction plate (thickness 2mm), it is fixed between the pressure plate 1 and the driven disk 2 by rivets to form a slidable friction transmission pair (torque capacity 600 Nm, slip angle ±5°). Or in the way of bolt connection to form a stable friction transmission structure. When power is input, the power is transmitted through the frictional force between the pressure plate 1 and the driven disk 2.

[0025] The shock absorber disk 6 is installed in the middle of the driven disk 2. There is a connecting shaft hole 5 in the middle of its disk body, and spline grooves can be arranged on the inner wall of the connecting shaft hole 5 for mating connection with the splines on the transmission shaft, so as to transmit power from the transmission shaft to the shock absorber disk 6.

[0026] A plurality of accommodating cavities 4 are distributed in a circular array around the connecting shaft hole 5 on the disk body of the shock absorber disk 6. The number of accommodating cavities 4 can be designed according to the shock absorption requirements and the size of the shock absorber. For example, 4 - 8 are set. The shape of the accommodating cavity 4 is cylindrical. The shock absorption component 3 includes an adapter cylinder 33 and a pre - fabricated telescopic rod 31 that fits. The barrel of the adapter cylinder 33 is a cylindrical structure made of 304 stainless steel. One end is fixed to one side of the inner wall of the accommodating cavity 4 by welding or bolt connection. A buffer pad can be arranged inside the adapter cylinder 33. The buffer pad is made of rubber material to reduce the collision and friction between the telescopic rod 31 and the inner wall of the adapter cylinder 33 during movement.

[0027] The rod body of the telescopic rod 31 is made of titanium alloy TC4. One end is fixed to the right side of the adapter cylinder 33 by threaded connection (M8×1.25), and the other end can freely expand and contract. The telescopic rod 31 can adopt a multi - stage telescopic structure to increase its telescopic stroke and shock absorption effect. The surface of the telescopic rod 31 is chrome - plated to improve its wear resistance and corrosion resistance. An elastic element, such as a spring, can also be arranged between the telescopic rod 31 and the adapter cylinder 33. The spring is sleeved on the telescopic rod 31. One end contacts the buffer pad inside the adapter cylinder 33, and the other end contacts the fixed end of the telescopic rod 31. When the telescopic rod 31 expands and contracts, the spring can play a buffering and resetting role.

[0028] Working principle When the drive shaft transmits power to the shock absorber disc 6, due to vibrations generated during the transmission process, the shock absorption assembly 3 starts to function. The telescopic rod 31 performs telescopic movement within the adaptor cylinder 33. Meanwhile, the spring is compressed or stretched. Through the elastic deformation of the spring and the buffering effect of the buffer pad, the transmission of vibrations is slowed down, thereby effectively reducing the vibrations of the shock absorber.

[0029] The design of this compact torque-limiting shock absorber avoids the traditional way of axially stacking springs and hydraulic dampers. By arranging the shock absorption assembly 3 in the annular array of accommodation cavities 4 on the disc body of the shock absorber disc 6, the axial length of the shock absorber is greatly reduced, solving the problem that traditional shock absorbers occupy the axial space of the gearbox. At the same time, since there is no need to reserve a large amount of deformation space for the helical spring or diaphragm spring, the outer diameter of the clutch driven disc 2 will not increase significantly in the traditional way, effectively saving space and being more conducive to layout in a limited space.

[0030] In hybrid vehicles, when the motor, clutch, and gearbox are coaxially arranged, the small volume of this compact torque-limiting shock absorber will not cause the total axial length to exceed the standard, providing the possibility for arranging a large-sized damping oil cavity. Thus, it avoids the problem of reduced damping coefficient of the hydraulic system due to space limitations, reduces the occurrence of dynamic balance problems, and improves the stability and reliability of hybrid vehicles.

[0031] The shock absorption assembly 3 adopts the structure of the adaptor cylinder 33 and the telescopic rod 31, combined with a spring and a buffer pad, which can effectively absorb and reduce vibrations. The multi-stage telescopic telescopic rod 31 increases the telescopic stroke, and the elastic deformation of the spring and the buffering effect of the buffer pad further enhance the shock absorption effect, ensuring the smoothness of the transmission process.

[0032] The structure of the entire shock absorber is relatively simple. The connection methods between components such as welding and bolt connection are mature and reliable, facilitating manufacturing, installation, and maintenance, reducing production costs and maintenance difficulties.

[0033] Please refer to Figure 7 , a compression area 39 is provided on the inner side of the adaptor cylinder 33. An adaptor block is slidably and sealingly installed on the inner side of the compression area 39. The adaptor block and the inner side of the adaptor cylinder 33 form an adjustable compression gap. A base 37 is provided at one end of the compression gap.

[0034] On the sides of the adaptor block and the base 37 close to each other, an elastic member 38 is provided. The outer side of the elastic member 38 maintains a fixed distance from the compression gap.

[0035] The adapter cylinder 33 is made of 304 stainless steel. The compression zone 39 on its inner side is arc-shaped, and the inner wall is precision-machined to a very low surface roughness, ensuring smooth sliding of the adapter block. The adapter cylinder 33 is constructed from a high-strength alloy steel to ensure it resists deformation under high pressure and offers excellent corrosion resistance for a long service life.

[0036] The adapter block, a sliding seal mounted within compression zone 39, is made of polyetheretherketone (PEEK) and forms an adjustable compression gap with the inner wall of adapter tube 33. This gap is crucial for achieving vibration reduction. The size of this gap can be adjusted based on actual vibration reduction requirements. A base 37, located at one end of the gap, is secured to adapter tube 33 by welding or bolting. Its smooth surface provides stable support for elastic member 38.

[0037] Base 37 is also made of alloy steel to ensure stability and strength, while elastic member 38 is a nickel-titanium memory alloy spring (stiffness 100 N / mm). Its ends contact the adapter block and base 37, respectively. Elastic member 38 is located on the side where the adapter block and base 37 are close to each other. A high-performance coil spring is typically used. The outer diameter of the coil spring is smaller than the diameter of the compression gap, ensuring a fixed distance between the outer side of elastic member 38 and the compression gap. This prevents friction and collision between elastic member 38 and the inner wall of adapter tube 33 during expansion and contraction, ensuring proper operation of elastic member 38.

[0038] Working process When the shock absorber is subjected to vibration, the telescopic rod 31 drives the adapter block to slide within the compression area 39. As the adapter block moves toward the base 37, it compresses the elastic member 38, storing energy. When the vibration reverses, the elastic member 38 releases energy, pushing the adapter block in the opposite direction, thereby mitigating the transmission of vibration. Furthermore, the adjustable compression gap can be adjusted based on actual operating conditions to optimize the vibration reduction effect. For example, under different vehicle loads or driving conditions, the initial position of the adapter block can be changed to adjust the size of the compression gap, thereby varying the preload of the elastic member 38 and achieving precise control of the vibration reduction performance.

[0039] The sliding of the adapter block within compression zone 39 and the expansion and contraction of elastic member 38 effectively absorb and buffer vibration energy. The elastic deformation of elastic member 38 converts the kinetic energy of vibration into elastic potential energy, which is then gradually released. This significantly reduces the amplitude and frequency of vibration, improves the damping effect of the shock absorber, and ensures smoother operation of the entire transmission system.

[0040] The adjustable compression gap facilitates performance optimization of the shock absorber. Users can flexibly adjust the compression gap and the preload force of the elastic member 38 to suit different usage scenarios and requirements, thereby precisely controlling the shock absorber's damping characteristics. This allows the shock absorber to adapt to a variety of operating conditions, enhancing its versatility and applicability.

[0041] The sliding seal between the adapter block and adapter sleeve 33, as well as the fixed spacing between the elastic member 38 and the compression gap, ensure the structural stability of the entire vibration damping assembly 3. The sliding seal prevents medium leakage and ensures stable pressure within the compression gap. The fixed spacing prevents friction and collision between the elastic member 38 and the inner wall of the adapter sleeve 33, extending the service life of the elastic member 38 and reducing the probability of failure.

[0042] See also Figure 6 and Figure 7 A through hole 36 is formed on both sides of the base 37 at one end of the adapter tube 33 , and the through hole 36 extends to the inner side of the adapter tube 33 to form a cavity 34 .

[0043] The compression gap between the base 37 and the adapter block is filled with a vibration-damping medium 35 to buffer the vibration caused by the compression of the elastic member 38 .

[0044] One end of the telescopic rod 31 close to the adapter block is connected to a resistance block 32 , and the resistance block 32 magnetically resists the adapter block for vibration reduction and buffering.

[0045] The interference block 32 includes a block body 322 . A slot 321 is formed on a side of the block body 322 close to the adapting block. A rubber strip is installed at the slot 321 .

[0046] A magnetic block 323 is provided in the middle of the block 322 and outside the slot 321 . The magnetic block 323 is in a repulsive or attractive state with one side of the adapter block.

[0047] The base 37 is fixed to the right end of the adapter tube 33 (60) and is made of 45 steel. Through holes 36 (generally between 5-10 mm) are opened on both sides. The through holes extend into the adapter tube 33 to form a cavity 34 for accommodating the vibration-damping medium 35 (silicon-based magnetorheological fluid, viscosity 5000 cP). The through holes 36 extend into the inside of the adapter tube 33 to form a cavity 34, which is used to provide a channel for the flow of the vibration-damping medium 35, so that the vibration-damping medium 35 can circulate between the compression gap and the cavity 34.

[0048] When the adapter block slides and compresses the elastic member 38 in the compression area 39 , the pressure in the compression gap changes, and the damping medium 35 flows into or out of the cavity 34 through the through hole 36 , thereby balancing the pressure and enhancing the damping effect.

[0049] The compression gap between the base 37 and the adapter block is filled with a damping medium 35, which is a silicon-based magnetorheological fluid with good viscosity and damping properties. When elastic member 38 is compressed, damping medium 35 acts as a buffer, absorbing the energy generated during the compression process and reducing the transmission of vibration. Furthermore, damping medium 35 acts as a lubricant during the sliding motion of the adapter block, reducing friction between the adapter block and the inner wall of adapter cylinder 33 and extending the service life of the component.

[0050] One end of the telescopic rod 31 close to the adapter block is connected to the resistance block 32, which is mainly composed of a block body 322, a rubber strip and a magnetic block 323. The block body 322 is made of aluminum alloy to reduce weight and ensure a certain strength.

[0051] An annular groove 321 (depth 2mm) is provided on the side of the block 322 close to the adapter block, and a fluororubber strip is embedded therein. Since the fluororubber strip has good elasticity and cushioning properties, its function is to further cushion the impact force when the conflict block 32 contacts the adapter block.

[0052] A magnetic block 323 is provided in the middle of the block 322, on the outside of the slot 321. The magnetic block 323 is made of a strong magnetic material, such as a neodymium iron boron magnet. The magnetic block 323 and one side of the adapter block can be set to a repulsive or attractive state according to design requirements. When in the repulsive state, when the adapter block approaches the interference block 32, the repulsive force generated by the magnetic block 323 can buffer part of the impact force in advance; when in the attractive state, when the adapter block is away from the interference block 32, the attractive force generated by the magnetic block 323 helps to reset the adapter block and improve the vibration reduction efficiency.

[0053] The filling of the damping medium 35 effectively absorbs and cushions the energy generated by the compression of the elastic member 38, reducing vibration transmission. Furthermore, the design of the through-hole 36 and cavity 34 provides a channel for the flow of the damping medium 35, further optimizing vibration damping performance. The design of the rubber strip of the resistance block 32 and the magnetic block 323 buffers and adjusts the impact force at different stages, whether in repulsion or attraction. This significantly enhances the vibration damping effect of the entire shock absorber and ensures a more stable transmission system.

[0054] The lubricating effect of the damping medium 35 reduces friction between the adapter block and the inner wall of the adapter cylinder 33, reducing component wear and extending the service life of the adapter block and adapter cylinder 33. The cushioning effect of the rubber strip also reduces direct collisions between the interference block 32 and the adapter block, protecting the interference block 32 and the adapter block, and improving their reliability and durability.

[0055] The repulsive or attractive state between the magnetic block 323 and the adapter block can be adjusted to suit different application scenarios and vibration reduction requirements. For example, if rapid impact buffering is required, the repulsive state can be set; if better repositioning of the adapter block is desired, the attractive state can be set. This flexibility allows the shock absorber to adapt to a variety of operating conditions, enhancing its versatility and applicability.

[0056] The block 322 of the abutment block 32 is made of aluminum alloy, which reduces the weight of the entire vibration damping assembly 3, helping to improve the vehicle's fuel economy and power performance. At the same time, the rational design and coordinated operation of the various components ensure the structural stability of the entire shock absorber, enabling it to operate reliably over long-term use.

[0057] See also Figure 5 An auxiliary vibration-damping portion 9 is provided on the outer side of the vibration-damping component 3 and on the inner side of the accommodating cavity 4 , and is used to cooperate with the vibration-damping component 3 to achieve buffering of the elastic member 38 .

[0058] A set of two symmetrically arranged protruding rings 8 are provided on the outside of the accommodating cavity 4 for wrapping the vibration damping assembly 3 .

[0059] The auxiliary vibration damping unit 9 is positioned outside the vibration damping assembly 3 and inside the accommodating chamber 4. It primarily consists of an elastic buffer layer and a damping adjustment layer. The elastic buffer layer is made of a rubber material with excellent elasticity and flexibility, and a Shore hardness between 50 and 70, effectively absorbing and dissipating vibration energy. The thickness of the rubber layer is determined by the dimensions of the accommodating chamber 4 and the vibration damping assembly 3, and is generally around 5-10 mm.

[0060] The damping adjustment layer, located outside the elastic buffer layer, is composed of multiple small damping units. Each damping unit is filled with a viscous liquid, such as silicone oil, and contains a movable piston. When the elastic member 38 compresses or expands within the vibration damping assembly 3, the generated vibration is transmitted to the auxiliary vibration damping unit 9. The elastic buffer layer first undergoes elastic deformation to initially dampen the vibration. Then, the piston in the damping adjustment layer moves within the viscous liquid, further dissipating the vibration energy through the liquid's viscous resistance, achieving fine-tuning of the vibration.

[0061] The cooperation between the auxiliary vibration damping part 9 and the vibration damping assembly 3 When the vibration transmitted by the transmission shaft compresses the elastic member 38 in the vibration damping assembly 3, the adapter block slides within the adapter cylinder 33, compressing the elastic member 38 and driving the flow of the vibration damping medium 35. At this time, the vibration generated by the vibration damping assembly 3 is transmitted outward to the auxiliary vibration damping portion 9. The elastic buffer layer first plays a preliminary buffering role, reducing the amplitude of the vibration. Then, according to the intensity and frequency of the vibration, the damping adjustment layer adjusts the damping force by the movement of the piston in the viscous liquid, making the buffering process of the elastic member 38 smoother and more efficient. For example, when the vibration is large, the piston in the damping adjustment layer moves faster, and the viscous resistance of the liquid increases, thereby enhancing the suppression of the vibration; when the vibration is small, the piston moves slower, and the damping force decreases accordingly to ensure the normal operation of the vibration damping assembly 3.

[0062] On the outer side of the accommodation cavity 4, there is a set of two symmetrically arranged convex rings 8. The convex rings 8 are made of high-strength metal materials such as stainless steel or aluminum alloy to ensure that they have sufficient strength and rigidity. The cross-sectional shape of the convex ring 8 is rectangular, with its height between 8 - 15 mm and its width between 10 - 20 mm. The distance between the two convex rings 8 is designed according to the size of the vibration damping assembly 3 and the vibration damping requirements, generally about 20 - 30 mm.

[0063] The two convex rings 8 play a role in wrapping and protecting the vibration damping assembly 3. They limit the radial displacement of the vibration damping assembly 3 within the accommodation cavity 4, preventing the vibration damping assembly 3 from excessive swaying and offset during vibration. When the vibration damping assembly 3 is subjected to vibration from the transmission shaft, the convex rings 8 can evenly disperse the force generated by the vibration to the outer wall of the accommodation cavity 4, avoiding damage to the accommodation cavity 4 due to excessive local stress. At the same time, the convex rings 8 can also prevent external dust, debris, etc. from entering the interior of the accommodation cavity 4, ensuring the normal working environment of the vibration damping assembly 3.

[0064] The auxiliary vibration damping portion 9 and the vibration damping assembly 3 cooperate with each other to form a dual vibration damping mechanism. The synergistic effect of the elastic buffer layer and the damping adjustment layer can absorb and adjust the vibration energy more comprehensively and finely, effectively improving the vibration damping effect of the shock absorber. Compared with a single vibration damping assembly 3, this dual vibration damping structure can better adapt to vibrations of different intensities and frequencies, enabling the transmission system to operate smoothly under various working conditions.

[0065] The wrapping effect of the convex rings 8 on the vibration damping assembly 3 enhances the structural stability of the entire shock absorber. It limits the radial displacement of the vibration damping assembly 3, reduces the local impact of the vibration on the accommodation cavity 4, and reduces the risk of damage to the accommodation cavity 4. At the same time, the convex rings 8 can also prevent external impurities from entering the accommodation cavity 4, protecting the components inside the vibration damping assembly 3 and extending the service life of the shock absorber.

[0066] The combined action of auxiliary damping member 9 and raised ring 8 provides a more stable and reliable vibration damper. This dual damping mechanism reduces fatigue damage to elastic member 38 and other components. The protective effect of raised ring 8 prevents damage to damping assembly 3 from external factors, thereby improving the reliability and durability of the entire damper, reducing the frequency of maintenance and replacement, and lowering operating costs.

[0067] The damping adjustment layer of the auxiliary vibration damping unit 9 automatically adjusts the damping force based on the actual vibration conditions, allowing the shock absorber to adapt to vibrations of varying intensities and frequencies. This ensures that the compact torque-limiting damper maintains excellent vibration damping performance in a variety of complex working environments and conditions, providing a wider range of applicability.

[0068] The foregoing is merely an embodiment of the present invention and is not intended to limit the present invention. It will be apparent to those skilled in the art that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are intended to be included within the scope of the claims of the present invention.

Claims

1. A compact torque-limiting vibration damper, comprising a pressure plate (1) for friction transmission and a driven disc (2) arranged in the middle of the pressure plate (1), wherein a connecting member (7) is provided on the outer side of the driven disc (2) and connected to the inner ring of the pressure plate (1) via the connecting member (7) to form a friction transmission structure, and a vibration damper disc (6) is installed in the middle of the driven disc (2). Its characteristics are: The damper disc (6) is provided with a connecting shaft hole (5) in the middle of the disc body for connecting the transmission shaft, and the damper disc body is provided with one or more accommodating cavities (4) distributed in a ring array around the connecting shaft hole (5), and a damping assembly (3) is installed inside the accommodating cavity (4) for reducing the vibration of the damper; The vibration damping assembly (3) comprises an adapting cylinder (33) and a prefabricated adapting telescopic rod (31), one end of the adapting cylinder (33) being connected to one side of the inner wall of the accommodating cavity (4), and the opposite side being fixed to one end of the telescopic rod (31).

2. The compact torque-limiting shock absorber according to claim 1, characterized in that: A compression area (39) is provided on the inner side of the adapter cylinder (33), and an adapter block is installed on the inner side of the compression area (39) in a sliding and sealing manner. An adjustable compression gap is formed between the adapter block and the inner side of the adapter cylinder (33), and a base (37) is provided at one end of the compression gap.

3. The compact torque-limiting shock absorber according to claim 2, characterized in that: An elastic member (38) is provided on the side where the adapter block and the base (37) are close to each other, and a fixed distance is maintained between the outer side of the elastic member (38) and the compression gap.

4. A compact torque-limiting shock absorber according to claim 2, characterized in that: Through holes (36) are provided on both sides of the base (37) at one end of the adapter tube (33), and the through holes (36) extend to the inner side of the adapter tube (33) to form a cavity (34).

5. The compact torque-limiting shock absorber according to claim 2, wherein: The compression gap between the base (37) and the adapter block is filled with a vibration-damping medium (35) for buffering the vibration of the elastic member (38) during compression.

6. The compact torque-limiting shock absorber according to claim 1, characterized in that: One end of the telescopic rod (31) close to the adapter block is connected to a resistance block (32), and the resistance block (32) is in magnetic resistance with the adapter block for vibration reduction and buffering.

7. A compact torque-limiting shock absorber according to claim 6, characterized in that: The interference block (32) comprises a block body (322), a side of the block body (322) close to the adapting block is provided with a slot (321), and a rubber strip is installed at the slot (321).

8. A compact torque-limiting shock absorber according to claim 7, characterized in that: A magnetic block (323) is provided in the middle of the block (322) and outside the card slot (321). The magnetic block (323) is in a repulsive or attractive state with one side of the adapter block.

9. A compact torque-limiting shock absorber according to claim 1, characterized in that: An auxiliary vibration-damping portion (9) is provided on the outside of the vibration-damping component (3) and on the inside of the accommodating cavity (4), and is used to cooperate with the vibration-damping component (3) to achieve buffering of the elastic member (38).

10. A compact torque-limiting shock absorber according to claim 1, characterized in that: A group of two symmetrically arranged protruding rings (8) are provided on the outside of the accommodating cavity (4) for wrapping the vibration damping component (3).

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