Diaphragm spring for torque limiter and torque limiter
By introducing heterogeneous areas into the diaphragm spring, the problems of material waste and high costs in the existing torque limiter are solved, and the effect of saving material manufacturing and reducing costs of the diaphragm spring is achieved.
Patent Information
- Application Number
- CN202421534185.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-06-28
AI Technical Summary
In existing torque limiters, the diaphragm spring wastes a lot of material during stamping, resulting in higher costs.
A diaphragm spring for torque limiters is designed, and its body includes a heterogeneous region, through the formation of welding or interruption regions, material waste during stamping is avoided, material savings and cost reductions.
Through the construction of the heterogeneous region, the diaphragm spring can be manufactured in a material-saving manner, reducing material costs while ensuring the need for friction in the torque limiter.
Smart Images
Figure CN222836139U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to a diaphragm spring for a torque limiter. In particular, the main body of the diaphragm spring includes a non-homogeneous region. The present disclosure also relates to a torque limiter including the diaphragm spring. Background Art
[0002] The torque generated by a motor vehicle engine is usually not constant but often fluctuates. This inconstant torque can be transmitted to the gearbox, causing vibrations of the gearbox and thus generating particularly undesirable noise or knocks, etc. In order to reduce the adverse effects of vibrations and improve the driving comfort of the vehicle, it is known to equip the vehicle drive train with a torque fluctuation absorption mechanism. The torque fluctuation absorption mechanism can allow the fluctuations in the torque generated by the vehicle engine to be limited and absorbed. It is known that the torque fluctuation absorption mechanism can include a torque limiter for limiting the torque that can be transmitted by the vehicle drive train.
[0003] Specifically, the torque input part and the torque output part of the torque limiter transmit torque through the friction between the two. When the torque generated by the vehicle engine exceeds the maximum torque that can be transmitted by the friction, the torque input part and the torque output part of the torque limiter will rotate relative to each other, thereby limiting the transmitted torque. The torque limiter generally includes a diaphragm spring that biases one of the torque input part and the torque output part toward the other to enhance the friction between the two. In the existing torque limiter, the diaphragm spring has an overall uniform annular structure, which is made by stamping to remove the central area of the sheet metal elastic material. However, this diaphragm spring wastes a lot of material during the stamping process and is relatively costly. Utility Model Content
[0004] Therefore, the present disclosure aims to solve the above problems existing in the existing torque limiter, and its purpose is to provide a diaphragm spring for the torque limiter, which can be manufactured in a way of saving materials and reducing costs, thereby reducing the production cost of the torque limiter as a whole.
[0005] The object is achieved by a diaphragm spring for a torque limiter according to an embodiment of the present disclosure, which includes a body having an annular shape around a central axis and including an inner side wall and an outer side wall, the inner side wall and the outer side wall being staggered in the direction of the central axis. The body includes a non-homogeneous region.
[0006] Since the main body of the diaphragm spring according to the present disclosure has a non-homogeneous region, the overall structure of the diaphragm spring is non-uniform. This non-uniform structure of the diaphragm spring enables it to be manufactured in a method different from the above-mentioned stamping process, avoiding material waste generated by the stamping process, saving materials and reducing production costs. In addition, this non-uniformly structured diaphragm spring can still provide sufficient biasing force in the axial direction to ensure that the friction between the torque input part and the torque output part of the torque limiter meets the torque transmission requirements.
[0007] The diaphragm spring for a torque limiter according to the present disclosure may also have one or more of the following features alone or in combination.
[0008] According to one embodiment of the present disclosure, the inhomogeneous region is a welding region.
[0009] According to one embodiment of the present disclosure, the inhomogeneous region is a discontinuous region.
[0010] According to one embodiment of the present disclosure, the body is formed of a strip material having a first end and a second end.
[0011] According to one embodiment of the present disclosure, the cross-section of the main body has a length L, and the strip material has a width T, and the width T is substantially equal to the length L.
[0012] According to the above technical features, most of the strip material is used to form the main body of the diaphragm spring, and is not discarded or wasted in the process of forming the diaphragm spring. Therefore, the diaphragm spring can be manufactured in a material-saving manner, reducing the material cost of the diaphragm spring.
[0013] According to one embodiment of the present disclosure, the main body is formed by winding the strip material.
[0014] According to one embodiment of the present disclosure, the inhomogeneous region of the body is a welded region formed by welding the first end and the second end together.
[0015] According to one embodiment of the present disclosure, the inhomogeneous region of the body is a discontinuous region separating the first end and the second end.
[0016] According to one embodiment of the present disclosure, a cross-section of the body has a rectangular shape or an arcuate shape.
[0017] The present disclosure also provides a torque limiter, which includes the diaphragm spring for a torque limiter as described above. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The above and other features and advantages of the present disclosure will become more apparent through the following detailed description of exemplary embodiments in conjunction with the accompanying drawings, and the description and drawings are only for illustrative purposes and are not intended to limit the scope of the present disclosure in any way. The following drawings are not deliberately drawn to scale with actual size, and the focus is on illustrating the subject matter of the present disclosure.
[0019] Figure 1 A diaphragm spring according to one embodiment of the present disclosure is shown, which includes a non-homogeneous region formed by a welded region;
[0020] Figure 2 is a schematic cross-sectional view of a diaphragm spring according to one embodiment of the present disclosure;
[0021] Figure 3 A strip of material used to form a diaphragm spring is shown;
[0022] Figure 4 A diaphragm spring of another embodiment of the present disclosure is shown, which includes a non-homogeneous region formed by discontinuous regions.
[0023] In the various figures, the same or similar components are denoted by the same reference numerals. DETAILED DESCRIPTION
[0024] In order to make the objectives, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure.
[0025] Unless otherwise defined, the technical terms or scientific terms used herein shall be the common meanings understood by ordinary technicians in the field to which the present disclosure belongs. The words "one", "an" or "the" and the like used in the patent application specification and claims of the present disclosure do not indicate a quantitative limitation, but indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Although expressions such as "first" and "second" are used to describe the various elements of the present disclosure, they are only used to distinguish one component from another, and are not used to limit the order or importance of the corresponding elements. Without departing from the scope of the present disclosure, "first element" can be written as "second element", and similarly, "second element" can be written as "first element". Directions such as "axial", "radial", and "circumferential" are defined relative to the central axis X of the diaphragm spring, the axial direction is the direction in which the central axis X extends, the radial direction is the direction perpendicular to the central axis X, and the circumferential direction is the circumferential direction around the central axis X.
[0026] For the convenience of description, the drawings of the present disclosure simplify or omit components commonly used in the art, such as external connection lines and other components not related to the description of the present disclosure. These omitted or simplified components do not affect the understanding of the content of the present disclosure by those skilled in the art.
[0027] Figure 1 is a schematic diagram of a diaphragm spring 1 according to an embodiment of the present disclosure. Figure 2 is a schematic cross-sectional view of the diaphragm spring 1 .
[0028] like Figure 1 As shown, the diaphragm spring 1 has a main body in an annular shape around the central axis X, and presents an annular structure as a whole. Figure 2 The cross section of the main body 10 of the diaphragm spring 1 has a substantially rectangular shape, and the length of the rectangle is L. The main body 10 includes an inner wall 12 and an outer wall 13 offset in the direction of the central axis X. The distance between the inner wall 12 and the outer wall 13 forms the thickness of the main body 10 of the diaphragm spring 1 in the axial direction. Thus, referring to Figure 2 The diaphragm spring 1 has a generally conical shape in the axial direction. When the diaphragm spring 1 is subjected to a load in the axial direction, the distance between the inner wall 12 and the outer wall 13 becomes smaller, and the thickness of the main body 10 is compressed. At this time, the diaphragm spring 1 has a tendency to restore its original shape, thereby generating an elastic force opposite to the load in the axial direction.
[0029] The diaphragm spring 1 can be used as an elastic component for generating biasing force in a torque limiter. Specifically, the torque limiter in a vehicle transmission system includes a torque input part and a torque output part arranged around a rotation axis. The torque input part is directly or indirectly connected to the crankshaft of the vehicle engine and receives the torque output of the engine. The torque output part is directly or indirectly connected to the gearbox of the vehicle and outputs the torque for driving the vehicle. The diaphragm spring 1 is arranged roughly coaxially with the torque input part and the torque output part in the torque limiter, and its central axis X roughly coincides with the rotation axis of the torque limiter. In the assembly structure of the torque limiter, the diaphragm spring 1 is compressed in the axial direction, and the elastic force generated thereby biases one of the torque input part and the torque output part toward the other. Under the bias of the diaphragm spring 1, a friction force is generated between the torque input part and the torque output part to prevent the relative sliding of the two. Therefore, torque can be transmitted between the torque input part and the torque output part of the torque limiter. When the torque generated by the vehicle engine exceeds the torque threshold, the torque input part and the torque output part will break through the limitation of the friction force and relative rotational slip will occur, thereby limiting the transmitted torque.
[0030] The conventional diaphragm spring used in the torque limiter has a circularly symmetrical structure. That is to say, the annular structure of the diaphragm spring is homogeneous in all areas in the circumferential direction. However, from the above description of the application scenarios of the diaphragm spring, it can be seen that when used in a torque limiter, the key parameter of the diaphragm spring is the total elastic biasing force generated in the axial direction, and there is no particularly high requirement for the uniformity of the elastic biasing force in the circumferential direction. This homogeneous diaphragm spring is mostly formed by stamping sheet materials, which in turn results in a large waste of material. For example, the material located inside the annular structure of the diaphragm spring will be stamped out and thus wasted in the process of manufacturing the diaphragm spring.
[0031] In order to solve this problem, the present disclosure provides a diaphragm spring 1 which no longer has a symmetrical structure in the circumferential direction. Figure 1 As shown, the main body 10 of the diaphragm spring 1 according to the present disclosure includes a non-homogeneous region 11. In particular, the non-homogeneous region 11 is an angular section on the annular shape of the main body 10. The diaphragm spring 1 has at least one characteristic in the non-homogeneous region 11 that is different from other regions.
[0032] Due to the inclusion of the above-mentioned inhomogeneous region 11, the diaphragm spring 1 according to the present disclosure is no longer circumferentially symmetrical, and the diaphragm spring 1 no longer needs to be punched out of a large piece of sheet material to ensure its symmetry, thereby avoiding material waste caused by the punching process.
[0033] In an optional embodiment of the present disclosure, the main body 10 of the diaphragm spring 1 is formed by a strip material 2. Figure 3 , the strip material 2 has a first end 2A and a second end 2B, and its width T is approximately equal to the length L of the cross section of the main body 10 of the diaphragm spring 1. When forming the main body 10, the strip material 2 can be wound to form the annular shape of the main body 10. The conical shape of the diaphragm spring 1 is also formed by the winding process. In addition, the strip material 2 having the first end 2A and the second end 2B can be a section of material cut from a longer strip material. This strip material with a larger length is continuously wound to form a multi-turn coil spring. Then, this multi-turn coil spring is cut to obtain a single-turn coil spring roughly corresponding to the annular shape of the main body 10.
[0034] After being wound into an annular shape, the first end 2A and the second end 2B of the strip material 2 may be welded together to form a welding area 11A, and the main body 10 of the diaphragm spring 1 thus formed has a complete annular shape. The inhomogeneous area 11 of the main body 10 is also formed by the welding area 11A. Alternatively, after being wound into an annular shape, the first end 2A and the second end 2B of the strip material 2 may also be spaced apart and not connected together, and the annular shape of the main body 10 of the diaphragm spring 1 thus formed is also discontinuous. The inhomogeneous area 11 of the main body 10 is also formed by the discontinuous area 11B that separates the first end 2A and the second end 2B.
[0035] It can be understood that the cross-sectional shape of the strip material 2 roughly corresponds to the cross-sectional shape of the main body 10 of the diaphragm spring 1. Figure 2 As shown, the cross section of the body 10 may have a generally rectangular shape. In an alternative embodiment not shown, the cross section of the body 10 may also have a generally arcuate shape.
[0036] As can be seen from the above, most of the material of the strip material 2 is retained after forming the main body 10 of the diaphragm spring 1. Therefore, compared with the circumferentially symmetrical diaphragm spring formed by stamping, the diaphragm spring 1 according to the present disclosure reduces material waste in the manufacturing process through the inhomogeneous region 11, saving material costs.
[0037] An embodiment of the present disclosure also provides a torque limiter including the diaphragm spring 1 described above.
[0038] Certain features, structures or characteristics in one or more embodiments of the present disclosure may be appropriately combined.
[0039] The above is an explanation of the present disclosure and should not be considered as a limitation thereof. Although several exemplary embodiments of the present disclosure are described, it will be readily appreciated by those skilled in the art that many modifications may be made to the exemplary embodiments without departing from the novel teachings and advantages of the present disclosure. Therefore, all such modifications are intended to be included within the scope of the present disclosure as defined in the claims. It should be understood that the above is an explanation of the present disclosure and the present disclosure should not be considered to be limited to the specific embodiments disclosed, and modifications to the disclosed embodiments and other embodiments are intended to be included within the scope of the present disclosure.
Claims
1. A diaphragm spring (1) for a torque limiter, characterized in that: The diaphragm spring (1) comprises a main body (10), the main body (10) having an annular shape around a central axis (X) and comprising an inner side wall (12) and an outer side wall (13), the inner side wall (12) and the outer side wall (13) being offset in the direction of the central axis (X), Wherein, the main body (10) comprises a non-homogeneous region (11).
2. The diaphragm spring (1) for a torque limiter according to claim 1, characterized in that The inhomogeneous region (11) is a welding region (11A).
3. The diaphragm spring (1) for a torque limiter according to claim 1, characterized in that: The inhomogeneous region (11) is a discontinuous region (11B).
4. The diaphragm spring (1) for a torque limiter according to claim 1, characterized in that The body (10) is formed from a strip of material (2) having a first end (2A) and a second end (2B).
5. The diaphragm spring (1) for a torque limiter according to claim 4, characterized in that The cross-section of the body (10) has a length L, and the strip of material (2) has a width T, which is substantially equal to the length L.
6. The diaphragm spring (1) for a torque limiter according to claim 4 or 5, characterized in that: The main body (10) is formed by winding the strip material (2).
7. The diaphragm spring (1) for a torque limiter according to claim 6, characterized in that The inhomogeneous region (11) of the body (10) is a welded region (11A) formed by welding the first end (2A) and the second end (2B) together.
8. The diaphragm spring (1) for a torque limiter according to claim 6, characterized in that The inhomogeneous region (11) of the body (10) is a discontinuous region (11B) separating the first end (2A) and the second end (2B).
9. The diaphragm spring (1) for a torque limiter according to any one of claims 1 to 3, characterized in that The cross section of the body (10) has a rectangular shape or an arcuate shape.
10. A torque limiter, characterized in that: The torque limiter comprises at least one diaphragm spring (1) for a torque limiter according to any one of claims 1 to 9.