A rear steel plate leaf spring assembly
By using a Z-shaped plate clamping and bushing assembly buffer design with multiple leaf spring units and fixed units, the design complexity and poor damping effect of multi-leaf spring assemblies are solved, achieving higher structural stability and service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGLING MOTORS
- Filing Date
- 2025-05-28
- Publication Date
- 2026-06-16
AI Technical Summary
Existing multi-leaf spring assemblies are complex in design, have many sub-components, are expensive, have poor damping performance, and are prone to slippage under high loads, leading to wear and reduced service life.
The structure adopts a multi-leaf spring unit structure, combined with the Z-shaped plate fixing method of the fixed unit and the noise reduction plate and bushing assembly of the vibration damping unit. By optimizing the stacked structure, the Z-shaped plate clamps the leaf spring, the bushing assembly buffers the stacked layers, and the noise reduction plate absorbs vibration, thereby improving the structural stability and vibration damping performance.
It significantly improves vibration damping and noise reduction performance and structural stability, extends service life, reduces metal collision noise, and prevents leaf spring sliding wear.
Smart Images
Figure CN224360944U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive parts technology, specifically to a rear leaf spring assembly. Background Technology
[0002] Leaf springs have advantages such as simple structure, low cost and easy maintenance, and are widely used in commercial vehicle suspension systems.
[0003] On the one hand, most of the existing leaf spring assemblies are single-leaf or double-leaf springs, which are insufficient to support the requirements of compliant high load-bearing capacity;
[0004] On the other hand, existing multi-leaf spring assemblies are complex in design, have many sub-components, and are expensive. At the same time, existing multi-leaf spring assemblies have poor damping effect, and under high loads, the leaf springs are prone to relative slippage, causing leaf spring wear and reducing the service life of the leaf springs. Utility Model Content
[0005] To address the shortcomings of existing technologies, this utility model provides a rear leaf spring assembly, which solves the problems of complex design, numerous sub-components, and high cost of existing multi-leaf leaf spring assemblies. At the same time, existing multi-leaf leaf spring assemblies have poor shock absorption performance, and under high loads, the leaf springs are prone to relative slippage, causing leaf spring wear and reducing the service life of the leaf springs.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a rear leaf spring assembly, comprising:
[0007] A multi-leaf spring unit, which is composed of multiple leaf springs stacked together;
[0008] A fixing unit is located at the vertical center of the multi-leaf spring unit and is used to fix multiple leaf springs in the multi-leaf spring unit.
[0009] The damping unit comprises two damping units symmetrically arranged at both ends of the multi-leaf spring unit, and each damping unit includes a noise reduction plate and a bushing assembly. The noise reduction plate and bushing assembly are installed between the ends of the multiple leaf springs for damping between the ends of the multiple leaf springs.
[0010] Preferably, the multi-leaf spring unit consists of a first leaf spring body, a second leaf spring body, a third leaf spring body, and a fourth leaf spring body arranged from top to bottom.
[0011] Preferably, the fixing unit includes multiple Z-shaped plates, which are respectively installed between the first leaf spring body and the second leaf spring body, between the second leaf spring body and the third leaf spring body, and between the third leaf spring body and the fourth leaf spring body.
[0012] Preferably, the front folded edges of the plurality of Z-shaped plates are respectively attached to the front surfaces of the second leaf spring body, the third leaf spring body, and the fourth leaf spring body, and the rear folded edges of the plurality of Z-shaped plates are respectively attached to the back surfaces of the first leaf spring body, the second leaf spring body, and the third leaf spring body.
[0013] Preferably, through holes are formed between the plurality of Z-shaped plates and the first leaf spring body, the second leaf spring body, the third leaf spring body and the fourth leaf spring body, and bolts are installed through the through holes.
[0014] Preferably, the noise reduction sheet is installed between the ends of the first leaf spring body and the second leaf spring body.
[0015] Preferably, the bushing assembly includes:
[0016] The bushing body is installed between the ends of the second leaf spring body, the third leaf spring body, and the fourth leaf spring body;
[0017] An insertion hole is provided between the two sides of the bushing body, and the end of the third leaf spring body is inserted into the insertion hole;
[0018] An arc-shaped extrusion section is installed at the bottom of the bushing body, and the arc-shaped extrusion section is in contact with the upper end of the fourth leaf spring body.
[0019] Preferably, protective plates are fixedly installed on both the front and rear sides of the bushing body, and the protective plates are in contact with the ends of the third leaf spring body.
[0020] This utility model discloses a rear leaf spring assembly, which has the following beneficial effects:
[0021] 1. In use, the rear leaf spring assembly can fix multiple leaf springs in the multi-leaf spring unit using the fixing unit, and the noise reduction plate and bushing assembly in the damping unit are installed between the ends of multiple leaf springs. By optimizing the stacked structure of the multi-leaf spring unit, innovating the Z-shaped plate fixing method of the fixing unit, and designing a damping unit that integrates the noise reduction plate and bushing assembly, the damping performance, structural stability and service life are significantly improved.
[0022] 2. In this rear leaf spring assembly, a noise-reducing sheet is installed between the ends of the first and second leaf spring bodies. The rubber material absorbs high-frequency vibration energy, reducing noise from direct metal-to-metal collisions. The bushing body is made of highly elastic polyurethane material, wrapping around the end of the third leaf spring body to form a flexible buffer layer. The arc-shaped compression section fits snugly against the upper end of the fourth leaf spring body, using an arc surface design to distribute pressure and avoid stress concentration. Protective plates are fixed to both sides of the bushing body to prevent lateral movement of the third leaf spring body end, enhancing structural stability. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1 This is a schematic diagram of the structure of this utility model;
[0025] Figure 2 This is a schematic diagram of the structure between the multi-leaf spring unit and the fixing unit of this utility model;
[0026] Figure 3 This is a schematic diagram of the structure between the multi-leaf spring unit and the shock absorption unit of this utility model;
[0027] Figure 4 This is a schematic diagram of the bushing assembly of this utility model.
[0028] In the diagram: 1. Multi-leaf spring unit; 11. First leaf spring body; 12. Second leaf spring body; 13. Third leaf spring body; 14. Fourth leaf spring body; 2. Fixing unit; 21. Z-shaped plate; 22. Bolt; 3. Vibration damping unit; 31. Noise reduction sheet; 32. Bushing assembly; 321. Bushing body; 322. Insertion hole; 323. Arc-shaped extrusion section; 324. Protective plate. Detailed Implementation
[0029] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.
[0030] This utility model discloses a rear leaf spring assembly.
[0031] According to the appendix Figure 1-4 As shown, it includes:
[0032] Multi-leaf spring unit 1, which is composed of multiple leaf springs stacked together;
[0033] Fixing unit 2 is located at the vertical center of multi-leaf spring unit 1 and is used to fix multiple leaf springs in multi-leaf spring unit 1;
[0034] The damping unit 3 has two damping units 3 symmetrically arranged at both ends of the multi-leaf spring unit 1. The damping unit 3 includes a noise reduction plate 31 and a bushing assembly 32. The noise reduction plate 31 and the bushing assembly 32 are installed between the ends of the multiple leaf springs for damping between the ends of the multiple leaf springs.
[0035] During use, the fixing unit 2 can fix multiple leaf springs in the multi-leaf spring unit 1, and the noise reduction plate 31 and bushing assembly 32 in the damping unit 3 are installed between the ends of multiple leaf springs. By optimizing the stacked structure of the multi-leaf spring unit 1, innovating the fixing method of the Z-shaped plate 21 of the fixing unit 2, and designing the damping unit 3 that integrates the noise reduction plate 31 and bushing assembly 32, the vibration reduction and noise reduction performance, structural stability and service life are significantly improved.
[0036] Furthermore, the multi-leaf spring unit 1 is composed of a first leaf spring body 11, a second leaf spring body 12, a third leaf spring body 13, and a fourth leaf spring body 14 arranged from top to bottom.
[0037] Furthermore, the fixing unit 2 includes a plurality of Z-shaped plates 21, which are respectively installed between the first leaf spring body 11 and the second leaf spring body 12, between the second leaf spring body 12 and the third leaf spring body 13, and between the third leaf spring body 13 and the fourth leaf spring body 14.
[0038] Furthermore, the front folded edges of the multiple Z-shaped plates 21 are respectively attached to the front sides of the second leaf spring body 12, the third leaf spring body 13, and the fourth leaf spring body 14, and the rear folded edges of the multiple Z-shaped plates 21 are respectively attached to the back sides of the first leaf spring body 11, the second leaf spring body 12, and the third leaf spring body 13, which can effectively clamp the first leaf spring body 11, the second leaf spring body 12, the third leaf spring body 13, and the fourth leaf spring body 14.
[0039] Furthermore, through holes are provided between the multiple Z-shaped plates 21 and the first leaf spring body 11, the second leaf spring body 12, the third leaf spring body 13 and the fourth leaf spring body 14, and bolts 22 are installed through the through holes.
[0040] Bolt 22 passes through the through hole between Z-shaped plate 21 and multi-leaf spring unit 1, and eliminates interlayer gaps through pre-tightening force to prevent loosening under alternating loads.
[0041] Furthermore, the noise reduction sheet 31 is installed between the ends of the first leaf spring body 11 and the second leaf spring body 12.
[0042] Specifically disclosed, bushing assembly 32 includes:
[0043] Bushing body 321 is installed between the ends of the second leaf spring body 12, the third leaf spring body 13 and the fourth leaf spring body 14;
[0044] The insertion hole 322 is located between the two sides of the bushing body 321, and the end of the third leaf spring body 13 is inserted into the insertion hole 322.
[0045] The arc-shaped compression section 323 is installed at the bottom of the bushing body 321 and is in contact with the upper end of the fourth leaf spring body 14.
[0046] Furthermore, protective plates 324 are fixedly installed on both the front and rear sides of the bushing body 321, and the protective plates 324 are in contact with the end of the third leaf spring body 13.
[0047] Noise-reducing sheet 31 is installed between the ends of the first leaf spring body 11 and the second leaf spring body 12. It absorbs high-frequency vibration energy through its rubber material, reducing noise from direct metal-to-metal collisions. Bushing body 321, made of highly elastic polyurethane material, wraps around the end of the third leaf spring body 13, forming a flexible buffer layer. The arc-shaped compression section 323 fits snugly against the upper end of the fourth leaf spring body 14, dispersing pressure through its arc surface design and preventing stress concentration. Protective plates 324 are fixed to both sides of the bushing body 321 to prevent lateral movement of the end of the third leaf spring body 13, enhancing structural stability.
[0048] When the vehicle is in motion, the impact force from the road surface is transmitted to the multi-leaf spring unit 1 through the wheels.
[0049] The first leaf spring body 11, as the main load-bearing component, deforms first, and the pressure is sequentially transmitted to the second leaf spring body 12, the third leaf spring body 13, and the fourth leaf spring body 14, dispersing the impact energy through the multi-layer structure. The Z-shaped plate 21 clamps the adjacent leaf spring bodies with its front and rear folded edges to prevent interlayer slippage; the bolt 22 provides preload to ensure the integrity of the leaf spring.
[0050] The guard plate 324 restricts the lateral movement of the end of the third leaf spring body 13 to prevent the bushing assembly 32 from coming off. The noise reduction sheet 31 absorbs high-frequency vibrations at the ends of the first leaf spring body 11 and the second leaf spring body 12, reducing metal friction noise. The elastic deformation of the bushing body 321 buffers the longitudinal impact of the second leaf spring body 12, the third leaf spring body 13 and the fourth leaf spring body 14, and the arc-shaped extrusion section 323 further dissipates energy through deformation.
[0051] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A rear leaf spring assembly, characterized in that, include: A multi-leaf spring unit (1) is composed of multiple leaf springs stacked together; A fixing unit (2) is provided at the vertical center of the multi-leaf spring unit (1) and is used to fix multiple leaf springs in the multi-leaf spring unit (1); The shock absorption unit (3) is symmetrically arranged at both ends of the multi-leaf spring unit (1). The shock absorption unit (3) includes a noise reduction plate (31) and a bushing assembly (32). The noise reduction plate (31) and the bushing assembly (32) are installed between the ends of the multiple leaf springs for shock absorption between the ends of the multiple leaf springs.
2. The rear leaf spring assembly according to claim 1, characterized in that, The multi-leaf spring unit (1) is composed of a first leaf spring body (11), a second leaf spring body (12), a third leaf spring body (13), and a fourth leaf spring body (14) arranged from top to bottom.
3. A rear leaf spring assembly according to claim 2, characterized in that, The fixing unit (2) includes multiple Z-shaped plates (21), which are respectively installed between the first leaf spring body (11) and the second leaf spring body (12), between the second leaf spring body (12) and the third leaf spring body (13), and between the third leaf spring body (13) and the fourth leaf spring body (14).
4. A rear leaf spring assembly according to claim 3, characterized in that, The front folded edges of the multiple Z-shaped plates (21) are respectively attached to the front of the second leaf spring body (12), the third leaf spring body (13) and the fourth leaf spring body (14), and the rear folded edges of the multiple Z-shaped plates (21) are respectively attached to the back of the first leaf spring body (11), the second leaf spring body (12) and the third leaf spring body (13).
5. A rear leaf spring assembly according to claim 3, characterized in that, A through hole is provided between the plurality of Z-shaped plates (21) and the first leaf spring body (11), the second leaf spring body (12), the third leaf spring body (13) and the fourth leaf spring body (14), and a bolt (22) is installed through the through hole.
6. A rear leaf spring assembly according to claim 1, characterized in that, The noise reduction sheet (31) is installed between the ends of the first leaf spring body (11) and the second leaf spring body (12).
7. A rear leaf spring assembly according to claim 1, characterized in that, The bushing assembly (32) includes: Bushing body (321) is installed between the ends of the second leaf spring body (12), the third leaf spring body (13) and the fourth leaf spring body (14); Insertion hole (322) is provided between the two sides of bushing body (321), and the end of the third leaf spring body (13) is inserted into insertion hole (322). An arc-shaped compression section (323) is installed at the bottom of the bushing body (321), and the arc-shaped compression section (323) is in contact with the upper end of the fourth leaf spring body (14).
8. A rear leaf spring assembly according to claim 7, characterized in that, The bushing body (321) is fixedly equipped with a guard plate (324) on both the front and rear sides, and the guard plate (324) is in contact with the end of the third leaf spring body (13).