Non-linear stiffness variable cross-section steel plate spring structure, suspension system and vehicle
By setting up a mortise and tenon assembly and a connecting assembly between the main reed and the auxiliary reed, the problem of misalignment between the main reed and the auxiliary reed is solved, and the stability and comfort of the suspension system are improved.
Patent Information
- Application Number
- CN202422402813.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-09-30
AI Technical Summary
In traditional nonlinear stiffness steel spring structures, the main spring and the secondary spring are prone to misalignment due to gasket wear or U-shaped clamp impact, affecting the performance and stability of the suspension system.
The nonlinear stiffness variable cross-section steel leaf spring structure is adopted, and the main reed and the auxiliary reed are fixed through the mortise and tenon assembly and the connecting assembly to avoid misalignment, and the intermediate gasket and buffer end pad are combined to reduce friction and noise.
Effectively avoid misalignment of the main spring and secondary spring, improve the overall performance and stability of the suspension system, reduce friction, absorb impact, and ensure the comfort and stiffness changes during empty loads.
Smart Images
Figure CN223164919U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of springs, in particular to a nonlinear stiffness variable-section steel leaf spring structure, a suspension system and a vehicle. Background Art
[0002] As one of the most traditional elastic elements in the automobile suspension system, the automobile leaf spring has the advantages of excellent reliability, simple structural design, short manufacturing process and low cost.
[0003] Traditional nonlinear leaf spring structures rely primarily on spacers between the main and auxiliary springs, or on flexible U-shaped clamps at each end, to prevent misalignment. These spacers wear out over time, causing friction or play between the main and auxiliary springs, which increases noise and vibration. Furthermore, as the spacers age, their shape may change, making them less effective in preventing misalignment. Due to the characteristics of variable-strength leaf springs, the ends of the leaf springs undergo repeated longitudinal displacement during operation. This inevitably causes the flexible U-shaped clamps to collide with the auxiliary springs. This, in turn, compromises the ability to prevent misalignment, affecting the overall performance and stability of the suspension system.
[0004] Therefore, a nonlinear stiffness variable-section leaf spring structure, a suspension system and a vehicle are needed to solve the above problems. Utility Model Content
[0005] The purpose of the utility model is to provide a nonlinear stiffness variable-section leaf spring structure, a suspension system and a vehicle, which can effectively avoid the misalignment of the main spring and the auxiliary spring, thereby ensuring the overall performance and stability of the suspension system.
[0006] To achieve this purpose, the present invention adopts the following technical solutions:
[0007] Nonlinear stiffness variable cross-section leaf spring structure, including:
[0008] a main reed extending along a first direction;
[0009] an auxiliary reed extending along the first direction and located at a lower end of the main reed;
[0010] The mortise and tenon assembly includes a boss, the boss is fixedly arranged on one of the main spring and the auxiliary spring, and the other of the main spring and the auxiliary spring is provided with a groove that cooperates with the boss, and the boss is located in the groove;
[0011] A connecting assembly is provided between the main spring and the auxiliary spring, and is used for fixedly connecting the main spring and the auxiliary spring.
[0012] In some embodiments, an intermediate gasket is further included. The intermediate gasket extends along the first direction, and the intermediate gasket is clamped between the main leaf spring and the auxiliary leaf spring.
[0013] In some embodiments, the intermediate gasket is provided with a first through hole and a second through hole. The connecting component passes through the first through hole, and the boss passes through the second through hole.
[0014] In some embodiments, the connecting component includes a connecting bolt and a nut. The connecting bolt sequentially passes through the auxiliary leaf spring, the intermediate gasket, and the main leaf spring and is screwed with the nut.
[0015] In some embodiments, both ends of the main leaf spring have leaf spring eyes, and bushings are installed in the leaf spring eyes.
[0016] In some embodiments, buffer end pads are provided at both ends of the auxiliary leaf spring, and the buffer end pads protrude relative to the auxiliary leaf spring toward the lower end of the main leaf spring.
[0017] In some embodiments, the thickness of the main leaf spring and the auxiliary leaf spring gradually decreases from the middle to both ends.
[0018] In some embodiments, multiple groups of the mortise and tenon components are arranged at intervals between the main leaf spring and the auxiliary leaf spring.
[0019] A suspension system includes a suspension body and the non-linear stiffness variable cross-section leaf spring structure as described above. The non-linear stiffness variable cross-section leaf spring structure is disposed on the suspension body.
[0020] A vehicle includes a vehicle body and the suspension system as described above. The suspension system is disposed on the vehicle body.
[0021] Advantages of the present utility model:
[0022] For a non-linear stiffness variable cross-section leaf spring structure provided by the present utility model, both the main leaf spring and the auxiliary leaf spring extend along the first direction, and the auxiliary leaf spring is located at the lower end of the main leaf spring. A mortise and tenon component is disposed between the main leaf spring and the auxiliary leaf spring. The boss of the mortise and tenon component is located on one of the main leaf spring and the auxiliary leaf spring, and a groove cooperating with the boss is formed on the other of the main leaf spring and the auxiliary leaf spring. The boss is located in the groove. The connecting component is disposed between the main leaf spring and the auxiliary leaf spring and is used for fixedly connecting the main leaf spring and the auxiliary leaf spring. By disposing the mortise and tenon component between the main leaf spring and the auxiliary leaf spring, the main leaf spring and the auxiliary leaf spring can be limited, so as to avoid lateral and longitudinal misalignment between the main leaf spring and the auxiliary leaf spring. Through the connecting component, the main leaf spring and the auxiliary leaf spring can be stably connected, ensuring the overall performance and stability of the suspension system using the non-linear stiffness variable cross-section leaf spring structure.
[0023] A suspension system provided by the present utility model includes a suspension main body and a non-linear stiffness variable cross-section leaf spring structure as above, which can effectively avoid the dislocation of the main spring and the auxiliary spring, thereby ensuring the overall performance and stability of the suspension system.
[0024] A vehicle provided by the present utility model includes a vehicle body and a suspension system as above, which can effectively avoid the dislocation of the main spring and the auxiliary spring, thereby ensuring the overall performance and stability of the suspension system. Description of the Drawings
[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description in the embodiments of the present utility model. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the embodiments of the present utility model and these drawings.
[0026] Figure 1 It is a schematic diagram of a non-linear stiffness variable cross-section leaf spring structure of the present utility model;
[0027] Figure 2 It is a cross-sectional view of a non-linear stiffness variable cross-section leaf spring structure of the present utility model;
[0028] Figure 3 is Figure 2 The partial enlarged view of part A in
[0029] In the figure:
[0030] 1. Main spring leaf; 11. Leaf spring eye; 111. Bushing; 12. Groove; 2. Auxiliary spring leaf; 21. Buffer end pad; 3. Intermediate gasket; 4. Connection assembly; 41. Connection bolt; 42. Nut; 5. Mortise and tenon assembly; 51. Boss. Detailed Embodiments
[0031] Before explaining any embodiment of the present application in detail, it should be understood that the present application is not limited to the structural details and component arrangements described in the following description or shown in the above drawings.
[0032] In this application, the terms "comprise", "include", "have" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or device comprising such element.
[0033] In this application, the terms "connect", "combine", "couple", "mount" can be direct connection, combination, coupling or mounting, or can be indirect connection, combination, coupling or mounting. Among them, by way of example, direct connection means that two parts or components are connected together without the need for an intermediate member, and indirect connection means that two parts or components are respectively connected to at least one intermediate member, and these two parts or components are connected through the intermediate member. In addition, "connect" and "couple" are not limited to physical or mechanical connection or coupling, and can include electrical connection or coupling.
[0034] In this application, those of ordinary skill in the art will understand that the functions performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by a part can also be performed by one part, one component, or a combination of multiple parts.
[0035] In this application, the orientation terms such as "upper", "lower", "left", "right", "front", "rear", etc. are described based on the orientation and positional relationship shown in the drawings, and should not be construed as a limitation on the embodiments of this application. In addition, in the context, it should also be understood that when it is mentioned that one element is connected "above" or "below" another element, it can not only be directly connected "above" or "below" another element, but also be indirectly connected "above" or "below" another element through an intermediate element. It should also be understood that orientation terms such as upper side, lower side, left side, right side, front side, rear side, etc. not only represent the positive orientation, but can also be understood as the side orientation. For example, the lower side can include directly below, lower left, lower right, lower front, and lower rear, etc.
[0036] In the process of manufacturing a leaf spring, in order to effectively avoid the misalignment of the main spring and the auxiliary spring, thereby ensuring the overall performance and stability of the suspension system, as Figures 1-3 shown, the present utility model provides a non-linear stiffness variable cross-section leaf spring structure. The non-linear stiffness variable cross-section leaf spring structure includes a main spring leaf 1, an auxiliary spring leaf 2, a mortise and tenon assembly 5, and a connection assembly 4.
[0037] Among them, the main leaf spring 1 extends along the first direction. The auxiliary leaf spring 2 extends along the first direction, and the auxiliary leaf spring 2 is located at the lower end of the main leaf spring 1. The mortise and tenon assembly 5 includes a boss 51, and the boss 51 is fixedly arranged on one of the main leaf spring 1 and the auxiliary leaf spring 2, and a groove 12 for cooperating with the boss 51 is formed on the other of the main leaf spring 1 and the auxiliary leaf spring 2, and the boss 51 is located in the groove 12. The connecting assembly 4 is arranged between the main leaf spring 1 and the auxiliary leaf spring 2 and is used for fixedly connecting the main leaf spring 1 and the auxiliary leaf spring 2.
[0038] By arranging the mortise and tenon assembly 5 between the main leaf spring 1 and the auxiliary leaf spring 2, the main leaf spring 1 and the auxiliary leaf spring 2 can be limited, so as to avoid the lateral and longitudinal misalignment between the main leaf spring 1 and the auxiliary leaf spring 2. Through the connecting assembly 4, the main leaf spring 1 and the auxiliary leaf spring 2 can be stably connected, ensuring the overall performance and stability of the suspension system using this non-linear stiffness variable cross-section leaf spring structure. Moreover, compared with the ordinary linear stiffness leaf spring, under the condition of meeting the load-bearing, this non-linear stiffness variable cross-section leaf spring structure has the characteristics of fewer leaf springs, lighter weight, and reduces the friction between the main leaf spring 1 and the auxiliary leaf spring 2, can better absorb the impact force, can change the stiffness when empty and fully loaded to ensure that the empty and full load frequencies are close, and has good comfort.
[0039] In some embodiments, multiple groups of mortise and tenon assemblies 5 are arranged at intervals between the main leaf spring 1 and the auxiliary leaf spring 2. Specifically, in this embodiment, the boss 51 is located on the auxiliary leaf spring 2, and two bosses 51 are arranged on the auxiliary leaf spring 2, and the two bosses 51 are located on both sides of the connecting assembly 4, and the connecting assembly 4 is located in the middle of the auxiliary leaf spring 2 and the main leaf spring 1. Through the above settings, the auxiliary leaf spring 2 and the main leaf spring 1 can be accurately limited, avoiding the lateral and longitudinal misalignment between the main leaf spring 1 and the auxiliary leaf spring 2.
[0040] In some embodiments, the non-linear stiffness variable cross-section leaf spring structure further includes an intermediate gasket 3, and the intermediate gasket 3 extends along the first direction, and the intermediate gasket 3 is clamped between the main leaf spring 1 and the auxiliary leaf spring 2. By arranging the intermediate gasket 3 to separate the main leaf spring 1 and the auxiliary leaf spring 2, the wear between the main leaf spring 1 and the auxiliary leaf spring 2 can be prevented, thereby ensuring its service life.
[0041] In some embodiments, the intermediate gasket 3 is provided with a first through hole and a second through hole, and the connecting assembly 4 passes through the first through hole, and the boss 51 passes through the second through hole. Through the above settings, during the cooperation of the boss 51 and the groove 12, the position of the intermediate gasket 3 can be synchronously defined. Moreover, by providing the first through hole, it is convenient for the connecting assembly 4 to fixedly connect the main leaf spring 1, the intermediate gasket 3 and the auxiliary leaf spring 2.
[0042] In some embodiments, the connecting component 4 includes a connecting bolt 41 and a nut 42. The connecting bolt 41 sequentially passes through the auxiliary leaf spring 2, the intermediate gasket 3, and the main leaf spring 1 and is screwed with the nut 42. By adopting the bolt and nut structure, it is convenient to assemble the main leaf spring 1, the intermediate gasket 3, and the auxiliary leaf spring 2. Moreover, after any one of the main leaf spring 1, the intermediate gasket 3, and the auxiliary leaf spring 2 is worn, it can be quickly replaced. In other embodiments, the main leaf spring 1, the intermediate gasket 3, and the auxiliary leaf spring 2 can also be connected by riveting, and no further limitation is made here.
[0043] In some embodiments, both ends of the main leaf spring 1 have leaf spring eyelets 11, and bushings 111 are installed in the leaf spring eyelets 11. By providing the leaf spring eyelets 11, it is convenient to connect to the vehicle frame or other fixed points through leaf spring pins or bolts subsequently. By providing the bushings 111 in the leaf spring eyelets 11, the friction and wear between the leaf spring eyelets 11 and the leaf spring pins can be reduced, vibrations and noises can be reduced, and the ride comfort and handling stability of the whole vehicle can be improved.
[0044] In some embodiments, buffer end pads 21 are provided at both ends of the auxiliary leaf spring 2, and the buffer end pads 21 protrude relative to the auxiliary leaf spring 2 toward the lower end of the main leaf spring 1. In this embodiment, the buffer end pads 21 are made of rubber, and the side of the buffer end pads 21 facing the main leaf spring 1 is semi-spherical. By providing the buffer end pads 21, when the auxiliary leaf spring 2 functions, the impact damage caused by the impact with the lower end of the main leaf spring 1 can be weakened, vibrations and noises can be reduced, and the service lives of the main leaf spring 1 and the auxiliary leaf spring 2 can be extended.
[0045] In some embodiments, the main leaf spring 1 and the auxiliary leaf spring 2 are gradually thinned from the middle to both ends. In this embodiment, the main leaf spring 1 and the auxiliary leaf spring 2 can be manufactured by rolling process, which can reduce the self-weights of the main leaf spring 1 and the auxiliary leaf spring 2. At the same time, the root design stress of the product can be adjusted to make the stress distribution of the main leaf spring 1 and the auxiliary leaf spring 2 uniform, and the service lives of the main leaf spring 1 and the auxiliary leaf spring 2 can be extended.
[0046] This embodiment also provides a suspension system. The suspension system includes a suspension main body and the non-linear stiffness variable cross-section leaf spring structure as above. The non-linear stiffness variable cross-section leaf spring structure is arranged on the suspension main body, which can effectively avoid the misalignment of the main leaf spring and the auxiliary leaf spring, thereby ensuring the overall performance and stability of the suspension system.
[0047] This embodiment also provides a vehicle. The vehicle includes a vehicle body and the suspension system as above. The suspension system is arranged on the vehicle body, which can effectively avoid the misalignment of the main leaf spring and the auxiliary leaf spring, thereby ensuring the overall performance and stability of the suspension system.
[0048] Obviously, the above embodiments of the present utility model are only examples for clearly explaining the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.
Claims
1. Nonlinear stiffness variable cross-section leaf spring structure, characterized in that, Comprising: A main leaf spring (1), the main leaf spring (1) extending along a first direction; An auxiliary leaf spring (2), the auxiliary leaf spring (2) extending along the first direction, and the auxiliary leaf spring (2) being located at the lower end of the main leaf spring (1); A mortise and tenon assembly (5), including a boss (51), the boss (51) being fixedly arranged on one of the main leaf spring (1) and the auxiliary leaf spring (2), and a groove (12) matching with the boss (51) being formed on the other of the main leaf spring (1) and the auxiliary leaf spring (2), the boss (51) being located in the groove (12); A connecting assembly (4), the connecting assembly (4) being arranged between the main leaf spring (1) and the auxiliary leaf spring (2) and used for fixedly connecting the main leaf spring (1) and the auxiliary leaf spring (2).
2. The non-linear stiffness variable cross-section leaf spring structure according to claim 1, wherein It further includes an intermediate gasket (3), the intermediate gasket (3) extending along the first direction, and the intermediate gasket (3) being clamped between the main leaf spring (1) and the auxiliary leaf spring (2).
3. The non-linear stiffness variable cross-section leaf spring structure according to claim 2, characterized in that The intermediate gasket (3) is provided with a first through hole and a second through hole, the connecting assembly (4) passes through the first through hole, and the boss (51) passes through the second through hole.
4. The non-linear stiffness variable cross-section leaf spring structure according to claim 2, characterized in that, The connecting assembly (4) includes a connecting bolt (41) and a nut (42), the connecting bolt (41) sequentially passes through the auxiliary leaf spring (2), the intermediate gasket (3) and the main leaf spring (1) and is screwed with the nut (42).
5. The non-linear stiffness variable cross-section leaf spring structure according to claim 1, characterized in that, Both ends of the main leaf spring (1) are provided with leaf spring eyes (11), and a bushing (111) is installed in the leaf spring eyes (11).
6. The non-linear stiffness variable cross-section leaf spring structure according to claim 1, characterized in that, Both ends of the auxiliary leaf spring (2) are provided with buffer end pads (21), and the buffer end pads (21) protrude towards the lower end of the main leaf spring (1) relative to the auxiliary leaf spring (2).
7. The non-linear stiffness variable cross-section leaf spring structure according to claim 1, characterized in that, The thickness of the main leaf spring (1) and the auxiliary leaf spring (2) gradually decreases from the middle to both ends.
8. The non-linear stiffness variable cross-section leaf spring structure according to claim 1, characterized in that, Multiple groups of the mortise and tenon assemblies (5) are arranged at intervals between the main leaf spring (1) and the auxiliary leaf spring (2).
9. Suspension system, characterized in that, Comprising a suspension body and a non-linear stiffness variable cross-section steel plate spring structure according to any one of claims 1-8, the non-linear stiffness variable cross-section steel plate spring structure being arranged on the suspension body.
10. A vehicle, characterized in that, Comprising a vehicle body and a suspension system according to claim 9, the suspension system being arranged on the vehicle body.