Torque limiter, torsion damper and vehicle

Abstract

The utility model discloses a torque limiter, a torsion damper and a vehicle, the torque limiter comprises a first cover plate, a second cover plate, a pressure plate and a friction disc assembly, and the first cover plate, the second cover plate, the pressure plate and the friction disc assembly are all annular pieces; a first space is formed between the first cover plate and the second cover plate, and part of the pressure plate is arranged in the first space; a first annular protrusion protruding towards the second cover plate and extending in the circumferential direction of the pressing plate is arranged at the radial inner end of the pressing plate, and a second annular protrusion protruding towards the pressing plate and extending in the circumferential direction of the second cover plate is arranged at the radial inner end of the second cover plate. The second annular protrusion and the first annular protrusion are oppositely arranged and define a second space between the pressing disc and the second cover plate. At least part of the friction disc assembly is arranged in the second space and arranged on the first annular protrusion and the second annular protrusion in a sleeving mode. According to the torque limiter, the anti-rust effect of the friction surface of the friction disc assembly is improved, and the anti-rust cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a torque limiter, a torsional damper and a vehicle. Background Art

[0002] The existing torque limiters have the same basic principle in structure, and all use a friction disc assembly in a normally closed state to transmit and limit torque. Due to unreasonable structural design, it is difficult for the existing torque limiters to achieve an anti-rust effect. Therefore, rust prevention treatment is usually carried out on the friction surface of the friction disc assembly, such as surface phosphating treatment of the friction surface of the friction disc assembly or using stainless steel materials, but the cost is relatively high. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a torque limiter, which can reduce the anti-rust cost while ensuring the anti-rust effect of the friction surface of the friction disc assembly.

[0004] The utility model also provides a torsional damper, including the above-mentioned torque limiter.

[0005] The utility model also provides a vehicle, including the above-mentioned torque limiter.

[0006] The torque limiter according to an embodiment of the utility model includes: a first cover plate, a second cover plate, a pressure plate and a friction disc assembly. The first cover plate, the second cover plate, the pressure plate and the friction disc assembly are all annular parts; the first cover plate and the second cover plate are stacked and connected, and a first space is formed between the first cover plate and the second cover plate. The pressure plate is placed in the first space; a first annular protrusion protruding towards the second cover plate and extending along the circumferential direction of the pressure plate is provided at the radially inner end of part of the pressure plate, and a second annular protrusion protruding towards the pressure plate and extending along the circumferential direction of the second cover plate is provided at the radially inner end of the second cover plate. The second annular protrusion is arranged opposite to the first annular protrusion and encloses to form a second space between the pressure plate and the second cover plate; at least part of the friction disc assembly is arranged in the second space and sleeved on the first annular protrusion and the second annular protrusion.

[0007] According to the torque limiter of the embodiment of the present utility model, a first space is formed between the first cover plate and the second cover plate, and part of the pressure plate is placed in the first space. The radially inner end of the pressure plate has a first annular protrusion protruding towards the second cover plate and extending along the circumferential direction of the pressure plate. The radially inner end of the second cover plate has a second annular protrusion protruding towards the pressure plate and extending along the circumferential direction of the second cover plate. The second annular protrusion is arranged opposite to the first annular protrusion and encloses a second space between the pressure plate and the second cover plate. At least part of the friction disc assembly is arranged in the second space and is sleeved on the first annular protrusion and the second annular protrusion. The second space forms a relatively sealed space, so that the second space has good sealing performance, thereby reducing the liquid entering the second space, improving the anti-rust effect of the friction surface of the friction disc assembly. At the same time, due to the improvement of the anti-rust effect of the friction surface of the friction disc assembly, the anti-rust coating treatment of the friction surface of the friction disc assembly can be correspondingly reduced, thereby reducing the anti-rust cost.

[0008] In some embodiments of the present utility model, the second cover plate has a first annular groove recessed away from the first cover plate and extending along the circumferential direction of the second cover plate. A first annular groove is formed between the second annular protrusion and the second cover plate. The first annular groove is recessed away from the first cover plate. The inner wall of the first annular groove, the pressure plate, the first annular protrusion and the second annular protrusion define the second space. The first cover plate has a second annular groove recessed away from the second cover plate and extending along the circumferential direction of the first cover plate. The inner wall of the first annular groove and the inner wall of the second annular groove define the first space.

[0009] In some embodiments of the present utility model, the torque limiter further includes: an inertia block assembly, which is stacked between the first cover plate and the second cover plate and is connected to the first cover plate and the second cover plate. The inertia block assembly is sleeved outside the pressure plate and is connected to the pressure plate.

[0010] In some embodiments of the present utility model, the inertia block assembly includes a plurality of first inertia blocks and a plurality of second inertia blocks. The plurality of first inertia blocks and the plurality of second inertia blocks are alternately arranged and connected along the circumferential direction of the pressure plate. The torque limiter further includes: a balance rivet, which penetrates through the first cover plate, the second cover plate and the first inertia block.

[0011] In some embodiments of the present utility model, the first inertia block and the second inertia block are integral parts. And / or, the plurality of first inertia blocks and the plurality of second inertia blocks are separate parts.

[0012] In some embodiments of the present utility model, a limiting groove is provided on the inner peripheral wall of the inertia block assembly, and a limiting protrusion cooperating with the limiting groove is provided on the outer peripheral wall of the pressure plate.

[0013] In some embodiments of the present utility model, a plurality of the limiting grooves are arranged at intervals along the circumferential direction of the inertia block assembly, and a plurality of the limiting protrusions are provided corresponding to the plurality of the limiting grooves one by one.

[0014] In some embodiments of the present utility model, the first cover plate has a second annular groove recessed away from the second cover plate and extending along the circumferential direction of the first cover plate, and the sum of the groove depth of the second annular groove and the thickness of the inertia block assembly is a fixed value.

[0015] The torsional damper according to an embodiment of the present utility model includes the above-mentioned torque limiter and damper, and the damper is connected to the friction disc assembly.

[0016] The torsional damper according to an embodiment of the present utility model forms a first space between the first cover plate and the second cover plate by arranging the above-mentioned torque limiter. A part of the pressure plate is placed in the first space. The radially inner end of the pressure plate has a first annular protrusion protruding towards the second cover plate and extending along the circumferential direction of the pressure plate. The radially inner end of the second cover plate has a second annular protrusion protruding towards the pressure plate and extending along the circumferential direction of the second cover plate. The second annular protrusion is arranged opposite to the first annular protrusion and encloses to form a second space between the pressure plate and the second cover plate. At least a part of the friction disc assembly is arranged in the second space and sleeved on the first annular protrusion and the second annular protrusion. The second space forms a relatively sealed space, so that the second space has good sealing performance, thereby reducing the liquid entering the second space and improving the rust prevention effect of the friction surface of the friction disc assembly. At the same time, due to the improvement of the rust prevention effect of the friction surface of the friction disc assembly, the rust prevention coating treatment of the friction surface of the friction disc assembly can be correspondingly reduced, thereby reducing the rust prevention cost.

[0017] The vehicle according to an embodiment of the present utility model includes the above-mentioned torsional damper.

[0018] According to the vehicle of the embodiment of the present utility model, by providing the above-mentioned torsional damper and the above-mentioned torque limiter, a first space is formed between the first cover plate and the second cover plate, and a part of the pressure plate is disposed in the first space. The radially inner end of the pressure plate has a first annular protrusion protruding towards the second cover plate and extending along the circumferential direction of the pressure plate. The radially inner end of the second cover plate has a second annular protrusion protruding towards the pressure plate and extending along the circumferential direction of the second cover plate. The second annular protrusion is disposed opposite to the first annular protrusion and they enclose to form a second space between the pressure plate and the second cover plate. At least a part of the friction plate assembly is disposed in the second space and sleeved on the first annular protrusion and the second annular protrusion. This makes the second space form a relatively sealed space, so that the second space has good sealing performance, thereby reducing the liquid entering the second space, improving the anti-rust effect of the friction surface of the friction plate assembly. At the same time, due to the improvement of the anti-rust effect of the friction surface of the friction plate assembly, the anti-rust coating treatment of the friction surface of the friction plate assembly can be correspondingly reduced, thus reducing the anti-rust cost.

[0019] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0021] Figure 1 is an exploded view of the torsional damper according to the embodiment of the present utility model;

[0022] Figure 2 is a cross-sectional view of the torsional damper according to the embodiment of the present utility model;

[0023] Figure 3 is Figure 2 an enlarged view of part A in

[0024] Figure 4 is a side view of the torsional damper according to the embodiment of the present utility model;

[0025] Figure 5 is a three-dimensional view of the second cover plate of the torque limiter according to the embodiment of the present utility model;

[0026] Figure 6 is a three-dimensional view of the pressure plate of the torque limiter according to the embodiment of the present utility model;

[0027] Figure 7 is a three-dimensional view of the friction plate assembly of the torque limiter according to the embodiment of the present utility model.

[0028] Reference Signs:

[0029] 100, torsional damper;

[0030] 10, torque limiter;

[0031] 1, pressure plate; 11, first annular protrusion; 12, limit protrusion;

[0032] 2, inertia block assembly; 21, first inertia block; 22, second inertia block; 23, limit groove;

[0033] 3, second cover plate; 31, first annular groove; 32, second annular protrusion;

[0034] 4, first cover plate; 41, second annular groove;

[0035] 5, friction disc assembly; 51, friction plate; 52, friction steel sheet;

[0036] 6, balance rivet;

[0037] 7, disc spring;

[0038] 8, cover plate rivet;

[0039] 91, first space; 92, second space;

[0040] 20, damper. Detailed implementation manner

[0041] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0043] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0044] Reference will now be made to Figures 1 - 7 describe the torque limiter 10 according to an embodiment of the present utility model.

[0045] As Figures 1 - 7 shown, the torque limiter 10 according to an embodiment of the present utility model includes: a first cover plate 4, a second cover plate 3, a pressure plate 1, and a friction plate assembly 5.

[0046] Specifically, referring to Figures 1 - 3 , Figure 5 and Figure 6 , the first cover plate 4, the second cover plate 3, the pressure plate 1, and the friction plate assembly 5 are all annular members. The first cover plate 4 and the second cover plate 3 are stacked and connected. Specifically, the outer periphery of the first cover plate 4 is connected to the outer periphery of the second cover plate 3. A first space 91 is formed between the first cover plate 4 and the second cover plate 3. Part of the pressure plate 1 is placed in the first space 91. A first annular protrusion 11 protruding towards the second cover plate 3 and extending along the circumferential direction of the pressure plate 1 is provided at the radially inner end of the pressure plate 1. A second annular protrusion 32 protruding towards the pressure plate 1 and extending along the circumferential direction of the second cover plate 3 is provided at the radially inner end of the second cover plate 3. The second annular protrusion 32 is disposed opposite to the first annular protrusion 11 and encloses a second space 92 between the pressure plate 1 and the second cover plate 3. At least part of the friction plate assembly 5 is disposed in the second space 92 and is sleeved on the first annular protrusion 11 and the second annular protrusion 32.

[0047] Among them, it should be noted that the first cover plate 4 is the flywheel side cover plate, and the second cover plate 3 is the transmission side cover plate, or the first cover plate 4 is the transmission side cover plate, and the second cover plate 3 is the flywheel side cover plate. For example, in the present utility model, the first cover plate 4 is the flywheel side cover plate, and the second cover plate 3 is the transmission side cover plate. The first cover plate 4 is connected to the engine flywheel, so that the engine flywheel can transmit torque to the first cover plate 4. The first cover plate 4 is relatively fixed to the pressure plate 1, so that the torque can be transmitted to the pressure plate 1. The second cover plate 3 is adapted to be connected to the vehicle transmission. Further, the torque limiter 10 further includes a disc spring 7. The disc spring 7 is disposed between the pressure plate 1 and the first cover plate 4 and is used to drive the pressure plate 1 to move in the direction of the friction disc assembly 5, so that the pressure plate 1 and the friction disc assembly 5 can be relatively stationary through frictional force, and the pressure plate 1 and the friction disc assembly 5 can transmit torque within a certain torque range. Further, as Figure 1 and Figure 4 shown, the friction disc assembly 5 is connected to the shock absorber 20. The shock absorber 20 is located radially inside the pressure plate 1, so that the torque can be transmitted to the shock absorber 20. Through the shock absorption effect of the shock absorber 20, the torque can be transmitted to the transmission (gearbox) to achieve smooth movement of the vehicle.

[0048] When the torque output by the engine flywheel is too large, the static frictional force between the pressure plate 1 and the friction disc assembly 5 cannot support the relative rest between the pressure plate 1 and the friction disc assembly 5, so that the pressure plate 1 and the friction disc assembly 5 rotate relative to each other, so that the excessive torque on the pressure plate 1 cannot be transmitted to the friction disc assembly 5, thus avoiding excessive torque being transmitted to the transmission, thereby reducing the damage to the vehicle transmission system.

[0049] It can be understood that for the torque limiter of general existing products, usually to prevent the relative sliding of the pressure plate, there will be a protruding part or a bent axial extension part at the outer circumference of the pressure plate. This protruding part or axial extension part will extend into the opening of the first cover plate or the second cover plate, so as to achieve linkage with the first cover plate or the second cover plate and can rotate integrally to eliminate or minimize the relative sliding of the pressure plate. However, the opening of the first cover plate or the second cover plate exposes the friction surface of the torque limiter to the external environment and is more likely to rust.

[0050] However, in the present utility model, the part of the first cover plate 4 opposite to the first space 91 is a closed panel, and the part of the second cover plate 3 opposite to the second space 92 is a closed panel, that is, there are no openings on the first cover plate 4 and the second cover plate 3 communicating with the first space 91 and the second space 92, and the second annular protrusion 32 is arranged opposite to the first annular protrusion 11, and the friction disc assembly 5 is sleeved on the first annular protrusion 11 and the second annular protrusion 32, so that the second space 92 forms a relatively sealed space, making the second space 92 have good sealing performance, thereby reducing the liquid from entering the second space 92. Since the friction surface of the friction disc assembly 5 is located in the second space 92, the rust prevention effect of the friction surface of the friction disc assembly 5 is improved. At the same time, due to the improvement of the rust prevention effect of the friction surface of the friction disc assembly 5, the rust prevention coating treatment of the friction surface of the friction disc assembly 5 can be correspondingly reduced, thereby reducing the rust prevention cost. That is, the rust prevention effect of the friction surface of the friction disc assembly 5 is realized through the structure, thereby reducing the rust prevention coating treatment of the friction surface of the friction disc assembly 5, and thus reducing the rust prevention cost.

[0051] Further, as Figure 1 and Figure 7 shown, the friction disc assembly 5 includes two friction plates 51 and a friction steel sheet 52 stacked together. The friction steel sheet 52 is arranged between the two friction plates 51, and the two friction plates 51 and the friction steel sheet 52 are connected to each other. The friction steel sheet 52 is connected to the shock absorber 20, so as to realize the torque transmission to the shock absorber 20. Among them, the part where the friction steel sheet 52 contacts the two friction plates 51 is the friction surface. At the same time, since the two friction plates 51 are sleeved on the first annular protrusion 11 and the second annular protrusion 32 and are located in the relatively closed second space 92, the probability of the friction surface of the friction steel sheet 52 rusting is reduced, and the service life of the torque limiter 10 is improved.

[0052] The shock absorber 20 according to the embodiment of the present utility model, as well as the shock absorption principle and effect of the shock absorber 20, are known to those of ordinary skill in the art and will not be described in detail here.

[0053] According to the torque limiter 10 of the embodiment of the present utility model, a first space 91 is formed between the first cover plate 4 and the second cover plate 3, and the pressure plate 1 is placed in the first space 91. The radially inner end of the pressure plate 1 has a first annular protrusion 11 protruding towards the second cover plate 3 and extending along the circumferential direction of the pressure plate 1. The radially inner end of the second cover plate 3 has a second annular protrusion 32 protruding towards the pressure plate 1 and extending along the circumferential direction of the second cover plate 3. The second annular protrusion 32 is disposed opposite to the first annular protrusion 11 and encloses a second space 92 between the pressure plate 1 and the second cover plate 3; at least a part of the friction disc assembly 5 is disposed in the second space 92 and sleeved on the first annular protrusion 11 and the second annular protrusion 32. The second space 92 forms a relatively sealed space, so that the second space 92 has good sealing performance, thereby reducing the entry of liquid into the second space 92, improving the anti-rust effect of the friction surface of the friction disc assembly 5. At the same time, due to the improvement of the anti-rust effect of the friction surface of the friction disc assembly 5, the anti-rust coating treatment of the friction surface of the friction disc assembly 5 can be correspondingly reduced, thereby reducing the anti-rust cost.

[0054] In some embodiments of the present utility model, as Figure 3 、 Figure 5 and Figure 6 shown, a first annular groove 31 is formed between the second annular protrusion 32 and the outer periphery of the second cover plate 3. The first annular groove 31 is recessed in a direction away from the first cover plate 4. The inner wall of the first annular groove 31, the pressure plate 1, the first annular protrusion 11 and the second annular protrusion 32 define the second space 92.

[0055] Among them, it should be noted that two friction plates 51 of the friction disc assembly 5 and a part of the friction steel sheet 52 are disposed in the second space 92, and the radially inner part of the friction steel sheet 52 is disposed outside the second space 92, so as to facilitate connection with the shock absorber 20.

[0056] It can be understood that since the first annular groove 31 is recessed away from the first cover plate 4, the circumferential wall of the first annular groove 31 facing the outer periphery of the second cover plate 3 can block the liquid from flowing into the second space 92, thereby blocking the flow to the friction disc assembly 5. Thus, the second space 92 defined by the inner wall of the first annular groove 31, the pressure plate 1, the first annular protrusion 11 and the second annular protrusion 32 has better sealing performance, thereby further improving the sealing performance between the pressure plate 1 and the second cover plate 3 and improving the anti-rust effect of the friction surface of the friction disc assembly 5.

[0057] Among them, outside the second space 92 is an annular installation space extending in the circumferential direction of the second cover plate 3. The circumferential wall on the side of the first annular groove 31 facing the outer periphery of the second cover plate 3 forms the outer circumferential wall of the second space 92, which can block the liquid from flowing into the second space 92 and flowing towards the friction disc assembly 5. The circumferential walls on the side of the second annular protrusion 32 and the first annular protrusion 11 facing the outer periphery of the second cover plate 3 form the inner circumferential wall of the second space 92, so that the liquid flowing into the second space 92 and flowing towards the friction disc assembly 5 can be further blocked. Thus, the second space 92 defined between the inner wall of the first annular groove 31, the pressure plate 1, the first annular protrusion 11 and the second annular protrusion 32 has better sealing performance, improving the rust prevention effect of the friction surface of the friction disc assembly 5.

[0058] Furthermore, as Figures 1 - 3 shown, the first cover plate 4 has a second annular groove 41 that is recessed away from the second cover plate 3 and extends in the circumferential direction of the first cover plate 4. A first space 91 is defined between the inner wall of the first annular groove 31 and the inner wall of the second annular groove 41. Among them, the second space 92 is located within the first space 91. The first annular groove 31 and the second annular groove 41 are partially blocked by the pressure plate 1. However, since the rotating shaft passes through the second cover plate 3 and the pressure plate 1, the central portions of the first annular groove 31 and the second annular groove 41 can still communicate. Thus, the overall sealing performance of the first space 91 is improved, and the sealing performance of the second space 92 can also be improved. By providing the second annular groove 41, the first space 91 formed between the inner wall of the first annular groove 31 and the inner wall of the second annular groove 41 has good sealing performance, so that the second space 92 has better sealing performance, improving the rust prevention effect of the friction surface of the friction disc assembly 5.

[0059] In some embodiments of the present utility model, as Figures 1 - 4 shown, the torque limiter 10 further includes: an inertia block assembly 2. The inertia block assembly 2 is stacked between the first cover plate 4 and the second cover plate 3 and is connected to the first cover plate 4 and the second cover plate 3. The inertia block assembly 2 is sleeved outside the pressure plate 1 and is connected to the pressure plate 1.

[0060] Among them, it should be noted that the moment of inertia of the torque limiter 10 is related to the weight of the torque limiter 10. By changing the weight of the torque limiter 10, the moment of inertia of the torque limiter 10 can meet the product requirements. Taking the increase of the moment of inertia as an example, if the mass is increased by increasing the outer diameter of the first cover plate 4 to achieve the increase of the moment of inertia, it is generally difficult to achieve under the existing products due to the limited layout space in the radial direction of the torque limiter 10. If the mass is increased by increasing the thickness of the first cover plate 4 in the axial direction to achieve the increase of the moment of inertia, the first cover plate 4 will move towards the shock absorber 20, resulting in the overall movement of the torque limiter 10 towards the shock absorber 20, so that the space in the axial direction on the radial inner side of the torque limiter 10 is insufficient, which is not conducive to the installation of the shock absorber 20.

[0061] It can be understood that, since a shock absorber 20 is provided on the radially inner side of the torque limiter 10, the space in the axial direction on the radially inner side of the torque limiter 10 is limited, while the space in the axial direction on the radially outer side of the torque limiter 10 is relatively abundant. Thus, the inertia block assembly 2 is sleeved outside the pressure plate 1 and connected to the pressure plate 1. By changing the thickness in the axial direction of the inertia block assembly 2, the weight of the torque limiter 10 can be changed to achieve the change of the moment of inertia, thereby making full use of the space in the axial direction on the radially outer side of the torque limiter 10, which is beneficial to the implementation of the change of the moment of inertia.

[0062] Meanwhile, by changing the thickness in the axial direction of the inertia block assembly 2 to change the weight of the torque limiter 10 to achieve the change of the moment of inertia, compared with changing the thickness of the entire torque limiter 10 to change the weight of the torque limiter 10 to achieve the change of the moment of inertia, materials are saved and costs are reduced.

[0063] Furthermore, as Figure 1 shown, the inertia block assembly 2, the first cover plate 4 and the second cover plate 3 are connected together by cover plate rivets 8. If the pressure plate 1 is directly connected to the second cover plate 3, since the outer diameter of the pressure plate 1 is smaller than the outer diameter of the second cover plate 3, connection holes for connecting with the pressure plate 1 need to be additionally provided on the second cover plate 3, which will affect the sealing performance of the second cover plate 3. By indirectly connecting through the connection between the inertia block assembly 2 and the second cover plate 3, additional connection holes for connecting with the pressure plate 1 on the second cover plate 3 are avoided, thereby improving the sealing performance of the second cover plate 3, and further improving the rust prevention effect of the friction surface of the friction disc assembly 5.

[0064] In some embodiments of the present invention, as Figure 1 and Figure 4 shown, the inertia block assembly 2 includes a plurality of first inertia blocks 21 and a plurality of second inertia blocks 22. The plurality of first inertia blocks 21 and the plurality of second inertia blocks 22 are alternately arranged and connected along the circumferential direction of the pressure plate 1. The torque limiter 10 further includes: a balance rivet 6, and the balance rivet 6 penetrates through the first cover plate 4, the second cover plate 3 and the first inertia block 21.

[0065] It can be understood that the setting of the balance rivet 6 is beneficial to the dynamic balance of the torque limiter 10 during rotation. The plurality of first inertia blocks 21 and the plurality of second inertia blocks 22 are alternately arranged along the circumferential direction of the pressure plate 1, so that the balance rivets 6 are evenly arranged in the circumferential direction of the pressure plate 1, which is further beneficial to the dynamic balance of the torque limiter 10 during rotation.

[0066] Among them, it should be noted that the balancing rivet 6 passes through the first inertia block 21 but not through the second inertia block 22, which can save the amount of balancing rivets 6 and thus save costs. At the same time, there is no need to provide a through-hole in the second inertia block 22 for the balancing rivet 6 to pass through, thus simplifying the structure of the second inertia block 22 and further saving costs.

[0067] In some embodiments of the present utility model, the first inertia block 21 and the second inertia block 22 are integral parts. Thereby, the production efficiency of the inertia block assembly 2 is improved.

[0068] In some embodiments of the present utility model, such as Figure 1 and Figure 4 As shown, a plurality of first inertia blocks 21 and a plurality of second inertia blocks 22 are separate parts. Thereby, it is convenient to separately design and manufacture the first inertia block 21 and the second inertia block 22 to meet different product requirements.

[0069] In some embodiments of the present utility model, such as Figure 1 、 Figure 4 and Figure 6 As shown, the inner peripheral wall of the inertia block assembly 2 has a limiting groove 23, and the outer peripheral wall of the pressure plate 1 has a limiting protrusion 12 that cooperates with the limiting groove 23. Thereby, through the mutual cooperation of the limiting groove 23 and the limiting protrusion 12, the inertia block assembly 2 and the pressure plate 1 can be connected and fixed.

[0070] In some embodiments of the present utility model, such as Figure 1 、 Figure 4 and Figure 6 As shown, the limiting grooves 23 are a plurality of spaced along the circumferential direction of the inertia block assembly 2, and the limiting protrusions 12 are a plurality corresponding to the plurality of limiting grooves 23 one by one. Thereby, the connection reliability between the inertia block assembly 2 and the pressure plate 1 is improved.

[0071] For example, in the examples shown in Figure 1 、 Figure 4 and Figure 6 the limiting protrusions 12 are six, and the limiting grooves 23 are also six corresponding ones, but the present utility model is not limited thereto, and the limiting protrusions 12 and the limiting grooves 23 can be other numbers, such as 2, 4, 8, or 10, etc.

[0072] In some embodiments of the present utility model, such as Figures 1 - 3 As shown, the first cover plate 4 has a second annular groove 41 that is recessed away from the second cover plate 3 and extends along the circumferential direction of the first cover plate 4, and the sum of the groove depth of the second annular groove 41 and the thickness of the inertia block assembly 2 is a fixed value. Among them, it should be noted that the groove depth of the second annular groove 41 can be adjusted by the angle between the circumferential wall in the radial direction of the second annular groove 41 and the bottom wall in the axial direction of the second annular groove 41.

[0073] It is understandable that the sum of the groove depth of the second annular groove 41 and the thickness of the inertia block assembly 2 is a fixed value. Thus, when the thickness of the inertia block assembly 2 changes, the groove depth of the second annular groove 41 can also change adaptively, so that the thickness of the torque limiter 10 in the overall axial direction remains constant, thereby avoiding changes in the positions of the torque limiter 10 and the shock absorber 20, and making the method of adjusting and designing the moment of inertia of the torque limiter 10 simple and convenient.

[0074] Furthermore, as Figures 1 - 3 shown, the disc spring 7 is arranged in the second annular groove 41, which can improve the limiting effect on the disc spring 7 and the installation reliability of the disc spring 7.

[0075] Next, refer to Figures 1 - 4 to describe the torsional shock absorber 100 according to an embodiment of the present invention.

[0076] As Figures 1 - 4 shown, the torsional shock absorber 100 according to an embodiment of the present invention includes the above-mentioned torque limiter 10 and shock absorber 20.

[0077] Specifically, refer to Figures 1 - 4 , the shock absorber 20 is connected to the friction disc assembly 5, so as to realize the torque transmission between the torque limiter 10 and the shock absorber 20.

[0078] Furthermore, as Figure 1 and Figure 7 shown, the friction disc assembly 5 includes two friction plates 51 and a friction steel sheet 52 arranged in a stacked manner. The friction steel sheet 52 is arranged between the two friction plates 51. The two friction plates 51 and the friction steel sheet 52 are connected to each other. The friction steel sheet 52 is connected to the shock absorber 20, so as to realize the torque transmission to the shock absorber 20.

[0079] According to the torsional damper 100 of the embodiment of the present utility model, by providing the above-mentioned torque limiter 10, a first space 91 is formed between the first cover plate 4 and the second cover plate 3. The pressure plate 1 is placed in the first space 91. The radially inner end of the pressure plate 1 has a first annular protrusion 11 that protrudes towards the second cover plate 3 and extends along the circumferential direction of the pressure plate 1. The radially inner end of the second cover plate 3 has a second annular protrusion 32 that protrudes towards the pressure plate 1 and extends along the circumferential direction of the second cover plate 3. The second annular protrusion 32 is arranged opposite to the first annular protrusion 11 and encloses to form a second space 92 between the pressure plate 1 and the second cover plate 3. At least a part of the friction disc assembly 5 is arranged in the second space 92 and is sleeved on the first annular protrusion 11 and the second annular protrusion 32. The second space 92 forms a relatively sealed space, so that the second space 92 has good sealing performance, thereby reducing the entry of liquid into the second space 92, improving the anti-rust effect of the friction surface of the friction disc assembly 5. At the same time, due to the improvement of the anti-rust effect of the friction surface of the friction disc assembly 5, the anti-rust coating treatment of the friction surface of the friction disc assembly 5 can be correspondingly reduced, thereby reducing the anti-rust cost. That is, the anti-rust effect of the friction surface of the friction disc assembly 5 is achieved through the structure, thereby reducing the anti-rust coating treatment of the friction surface of the friction disc assembly 5, and thus reducing the anti-rust cost.

[0080] According to the vehicle of the embodiment of the present utility model, it includes the above-mentioned torsional damper 100,

[0081] According to the vehicle of the embodiment of the present utility model, by providing the above-mentioned torsional damper 100 and the above-mentioned torque limiter 10, a first space 91 is formed between the first cover plate 4 and the second cover plate 3. The pressure plate 1 is placed in the first space 91. The radially inner end of the pressure plate 1 has a first annular protrusion 11 that protrudes towards the second cover plate 3 and extends along the circumferential direction of the pressure plate 1. The radially inner end of the second cover plate 3 has a second annular protrusion 32 that protrudes towards the pressure plate 1 and extends along the circumferential direction of the second cover plate 3. The second annular protrusion 32 is arranged opposite to the first annular protrusion 11 and encloses to form a second space 92 between the pressure plate 1 and the second cover plate 3. At least a part of the friction disc assembly 5 is arranged in the second space 92 and is sleeved on the first annular protrusion 11 and the second annular protrusion 32. The second space 92 forms a relatively sealed space, so that the second space 92 has good sealing performance, thereby reducing the entry of liquid into the second space 92, improving the anti-rust effect of the friction surface of the friction disc assembly 5. At the same time, due to the improvement of the anti-rust effect of the friction surface of the friction disc assembly 5, the anti-rust coating treatment of the friction surface of the friction disc assembly 5 can be correspondingly reduced, thereby reducing the anti-rust cost. That is, the anti-rust effect of the friction surface of the friction disc assembly 5 is achieved through the structure, thereby reducing the anti-rust coating treatment of the friction surface of the friction disc assembly 5, and thus reducing the anti-rust cost.

[0082] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0083] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A torque limiter, characterized in that: include: A first cover plate, a second cover plate, a pressure plate and a friction plate assembly, wherein the first cover plate, the second cover plate, the pressure plate and the friction plate assembly are all annular parts; The first cover plate and the second cover plate are stacked and connected, a first space is formed between the first cover plate and the second cover plate, and part of the pressure plate is placed in the first space; The radial inner end of the pressure plate is provided with a first annular protrusion protruding toward the second cover plate and extending in the circumferential direction of the pressure plate, and the radial inner end of the second cover plate is provided with a second annular protrusion protruding toward the pressure plate and extending in the circumferential direction of the second cover plate, and the second annular protrusion is arranged opposite to the first annular protrusion and surrounds a second space between the pressure plate and the second cover plate; At least a portion of the friction disc assembly is disposed in the second space and is sleeved on the first annular protrusion and the second annular protrusion.

2. The torque limiter according to claim 1, characterized in that: The second cover plate has a first annular groove that is recessed away from the first cover plate and extends along the circumferential direction of the second cover plate, a first annular groove is formed between the second annular protrusion and the second cover plate, the first annular groove is recessed in a direction away from the first cover plate, and the second space is defined between the inner wall of the first annular groove, the pressure plate, the first annular protrusion and the second annular protrusion; The first cover plate has a second annular groove which is recessed away from the second cover plate and extends in a circumferential direction of the first cover plate, and the first space is defined between an inner wall of the first annular groove and an inner wall of the second annular groove.

3. The torque limiter according to claim 1, characterized in that: Also includes: An inertia block assembly is stacked between the first cover plate and the second cover plate and connected to the first cover plate and the second cover plate. The inertia block assembly is sleeved outside the pressure plate and connected to the pressure plate.

4. The torque limiter according to claim 3, characterized in that: The inertia block assembly includes a plurality of first inertia blocks and a plurality of second inertia blocks, wherein the plurality of first inertia blocks and the plurality of second inertia blocks are alternately arranged and connected along the circumferential direction of the pressure plate, and the torque limiter further includes: A balance rivet is provided through the first cover plate, the second cover plate and the first inertia block.

5. The torque limiter according to claim 4, characterized in that: The first inertia block and the second inertia block are an integrated piece; And / or, the plurality of first inertia blocks and the plurality of second inertia blocks are separate parts.

6. The torque limiter according to claim 3, characterized in that: The inner peripheral wall of the inertia block assembly is provided with a limiting groove, and the outer peripheral wall of the pressure plate is provided with a limiting protrusion matched with the limiting groove.

7. The torque limiter according to claim 6, characterized in that: The limiting grooves are multiple and spaced apart along the circumferential direction of the inertia block assembly, and the limiting protrusions are multiple and correspond one-to-one to the multiple limiting grooves.

8. The torque limiter according to claim 3, characterized in that: The first cover plate has a second annular groove which is recessed away from the second cover plate and extends along the circumferential direction of the first cover plate. The sum of the groove depth of the second annular groove and the thickness of the inertia block assembly is a constant value.

9. A torsional vibration damper, characterized in that: include: The torque limiter according to any one of claims 1 to 8; A shock absorber is connected to the friction disc assembly.

10. A vehicle, characterized in that: Comprising a torsional vibration damper according to claim 9.

Images