An abnormal small mining truck steel plate spring assembly

Abstract

The utility model provides a kind of special-shaped small mine truck steel plate spring assembly, including first steel plate spring, the both ends of first steel plate spring are provided with ear, at least one second steel plate spring is stacked in the lower part of first steel plate spring, and the one end of the second steel plate spring adjacent to first steel plate spring is provided with a package ear, the utility model is stacked with the structure of first steel plate spring and second steel plate spring, can flexibly adjust rigidity according to different load conditions, makes suspension deviation frequency keep stable, effectively improves the smoothness of vehicle travel and the riding comfort of driver and passenger.

Description

Technical Field

[0001] This utility model relates to the field of automotive leaf spring manufacturing technology, specifically to a special-shaped small mining truck leaf spring assembly. Background Technology

[0002] In the field of mining transportation, small mining trucks have become the core tool for short-distance material transportation in mining areas due to their flexibility, efficiency, and strong passability. The reliability of their chassis performance directly affects transportation efficiency and operational safety. As a key load-bearing component of the chassis suspension system, leaf springs play a decisive role in the vehicle's ride comfort, load-bearing capacity, and protection of chassis components.

[0003] Traditional mining truck leaf springs have long been used in mining operations due to their advantages such as simple and reliable structure, low manufacturing cost, and easy maintenance. They adopt a composite structure of steel plates with equal cross-sections, and vibration attenuation is achieved through inter-plate friction damping, which can meet basic load-bearing requirements under conventional loads.

[0004] With the large-scale development of mining operations, small mining trucks face increasingly demanding working conditions. They not only need to frequently deal with complex road surfaces that are uneven and covered with gravel, but also need to maintain chassis stability during heavy-duty transportation. Traditional mining truck leaf springs are difficult to effectively balance stiffness changes when facing different loads, resulting in unstable suspension frequencies. This affects the smoothness of vehicle driving and the comfort of drivers and passengers. At the same time, there is still room for improvement in terms of load-bearing capacity and cushioning performance, which cannot fully meet the mining industry's demand for efficient and stable transportation equipment. Utility Model Content

[0005] In view of this, the present invention provides a special-shaped small mining truck leaf spring assembly, which can flexibly adjust the stiffness according to different load conditions through the stacked structure of the first leaf spring and the second leaf spring, so as to keep the suspension frequency stable and effectively improve the smoothness of vehicle driving and the ride comfort of drivers and passengers.

[0006] To solve the above-mentioned technical problems, this utility model provides a special-shaped small mining truck leaf spring assembly, including a first leaf spring, which serves as the main load-bearing component. Both ends of the first leaf spring are provided with lugs, which are used to connect with components such as the vehicle frame to realize the installation and fixation of the leaf spring assembly on the vehicle.

[0007] At least one second leaf spring is stacked below the first leaf spring. The second leaf spring can assist the first leaf spring in bearing the load. The number of second leaf springs can be set according to the actual load requirements.

[0008] The second leaf spring, which is adjacent to the first leaf spring, has a lug at one end. The lug enhances the connection stability between the adjacent first and second leaf springs.

[0009] The bottommost second leaf spring has an anti-rebound plate at its lower part. Both ends of the anti-rebound plate are bent downwards. The anti-rebound plate can effectively limit the excessive bounce of the leaf spring when subjected to severe impact.

[0010] The first leaf spring and the second leaf spring are connected by at least one first leaf spring clip, which can tightly fix the first leaf spring and the second leaf spring together.

[0011] The first leaf spring, the second leaf spring, and one end of the anti-rebound plate are connected by a second leaf spring clip, which ensures a reliable connection between the anti-rebound plate and the first and second leaf springs.

[0012] The first leaf spring, the second leaf spring, and the anti-rebound plate are connected by fixing bolts. The fixing bolts provide a stable central connection point for the entire leaf spring assembly, ensuring that the components will not loosen or fall off under long-term alternating loads.

[0013] The fixing bolts are located at the center of the first leaf spring, the second leaf spring, and the anti-rebound plate, which improves the structural strength and service life of the entire leaf spring assembly.

[0014] The beneficial effects of the above-mentioned technical solution of this utility model are as follows:

[0015] 1. The main and auxiliary structure design is adopted. The first leaf spring undertakes the main load-bearing task, while the second leaf spring assists the first leaf spring when the vehicle is heavily loaded or encounters a large impact, thereby enhancing the overall load-bearing capacity and buffering performance of the leaf spring. The shape and size of the spring plates are optimized. The first and second leaf springs adopt a variable cross-section design, so that the spring plates have different thicknesses in different parts, thereby improving the material utilization rate and the equal strength performance of the leaf spring.

[0016] 2. Advanced manufacturing processes such as hot forming, quenching, and tempering are adopted. During the hot forming process, the forming accuracy is strictly controlled to ensure that the curvature of the first and second leaf springs meets the design requirements. The quenching process adopts high-temperature rapid quenching technology to give the spring steel a good martensitic structure, improving its hardness and strength. The tempering process precisely controls the tempering temperature and time according to the material characteristics and product requirements to eliminate quenching stress and improve the toughness and stability of the leaf springs. At the same time, the surface of the leaf springs is shot-peened to form residual compressive stress on the surface of the leaf springs, thereby improving their fatigue life.

[0017] 3. Strengthening the connection between the first and second leaf springs: A U-shaped lug is provided at one end of the second leaf spring adjacent to the first leaf spring. The lug is tightly wrapped around the end of the first leaf spring by welding or other methods, which significantly enhances the connection strength between the first and second leaf springs, reduces relative sliding and wear between the leaves, and improves the ability of the two to deform together under load, ensuring the uniformity and reliability of load transmission.

[0018] 4. Reliable fixing of multiple components: The first and second leaf springs are clamped together by the first leaf spring clip (U-shaped structure, bolted at both ends). The second leaf spring clip achieves a reliable connection between the anti-rebound plate and the first and second leaf springs. Together with the fixing bolt in the center (passing through the first and second leaf springs and the anti-rebound plate, and tightened by nuts and washers at both ends), a multi-point stable connection system is formed to prevent components from loosening or falling off, and to ensure the structural stability under long-term alternating loads.

[0019] 5. Variable cross-section optimization design: The first and second leaf springs adopt a variable cross-section structure. Based on the stress analysis, different thicknesses and widths are set in different parts to effectively optimize stress distribution, improve load-bearing capacity (compared to the traditional constant cross-section structure), and significantly enhance fatigue resistance to meet the high strength requirements of heavy-duty transportation in mines.

[0020] 6. Adjustable number of second leaf springs: The number of second leaf springs can be flexibly set according to the actual load. By increasing or decreasing the number of second leaf springs, the suspension stiffness can be adjusted in stages to adapt to different load requirements under complex mining conditions and balance vehicle ride comfort and load-bearing capacity.

[0021] 7. Anti-rebound function: A high-strength anti-rebound plate with both ends bent downwards is set at the lower part of the second leaf spring at the bottom. It is fixed to the second leaf spring by welding or bolts. During the spring compression or rebound, its bent part cooperates with the chassis limiting structure to effectively limit excessive bounce, avoid damage to chassis components due to severe impact from the spring, and improve vehicle driving stability and driver and passenger comfort. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the overall bottom view of the present invention;

[0024] Figure 3 This is a schematic diagram of the overall structure of the other side of this utility model.

[0025] In the diagram: 101, first leaf spring; 102, coil lug; 103, second leaf spring; 104, wrap lug; 201, anti-rebound plate;

[0026] 301. First leaf spring clip; 302. Second leaf spring clip;

[0027] 401. Fixing bolts. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of this utility model. Figure 1-3 The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0029] A special-shaped small mining truck leaf spring assembly, such as Figure 1 , 2 As shown: It includes a first leaf spring 101, which is the main load-bearing component. Both ends of the first leaf spring 101 are provided with lugs 102, which are used to connect with components such as the vehicle frame to realize the installation and fixation of the leaf spring assembly on the vehicle.

[0030] The shape and size of the lug 102 are adapted to the mounting holes on the vehicle frame. The lug 102 of the first leaf spring 101 is connected to the frame through connecting parts such as pins, so that the entire leaf spring assembly can be installed on the vehicle chassis. A bushing is installed inside the lug 102. High-quality bushing materials are used to improve its fatigue resistance.

[0031] The first leaf spring 101 and the second leaf spring 103 adopt a variable cross-section design. Based on the stress analysis, different thicknesses and widths are set in different parts to optimize stress distribution and improve their load-bearing capacity and fatigue resistance.

[0032] like Figure 1 As shown: At least one second leaf spring 103 is stacked on the lower part of the first leaf spring 101. In this embodiment, three second leaf springs 103 are set. The second leaf springs 103 can assist the first leaf spring 101 in bearing the load. Different numbers of second leaf springs 103 can be set according to the actual load-bearing requirements, so as to flexibly adjust the load-bearing capacity and stiffness characteristics of the entire leaf spring assembly.

[0033] like Figure 2 As shown: The second leaf spring 103 adjacent to the first leaf spring 101 is provided with a lug 104 at one end. The lug 104 can enhance the connection stability between the adjacent first and second leaf springs 103, so that the first and second leaf springs 103 can better cooperate in bearing force during operation, reduce the relative sliding and wear between the leaves, and improve the overall reliability.

[0034] The lug 104 is a recessed lug 104 that wraps around the corresponding end of the first leaf spring 101. The lug 104 is tightly connected to the first leaf spring 101 by welding or other fixing methods, thereby enhancing the connection strength and stability of the first and second leaf springs 103 at this end, so that the two can better deform together when bearing load.

[0035] like Figure 2 , 3 As shown: The bottommost second leaf spring 103 is provided with an anti-rebound plate 201. The anti-rebound plate 201 is made of high-strength steel plate. Both ends of the anti-rebound plate 201 are bent downwards. The anti-rebound plate 201 can effectively limit the excessive jumping of the leaf spring when subjected to severe impact.

[0036] The anti-rebound plate 201 can effectively limit the excessive bounce of the first and second leaf springs 103 when subjected to severe impact. In particular, the downward bending structure at both ends can provide better limiting effect during spring compression and rebound, avoiding damage to vehicle chassis components due to excessive spring rebound, and further improving the stability and safety of vehicle driving.

[0037] The anti-rebound plate 201 is fixed to the lower part of the bottom second leaf spring 103 by welding or bolt connection. When the leaf spring is subjected to severe impact and compressed during vehicle operation, the bent part of the anti-rebound plate 201 can cooperate with the limiting structure on the vehicle chassis to limit the excessive compression and rebound of the spring, prevent the spring from rebounding, and thus protect the chassis components from damage.

[0038] like Figure 2 , 3 As shown: The first leaf spring 101 and the second leaf spring 103 are connected by at least one first leaf spring clip 301. The first leaf spring clip 301 can tightly fix the first leaf spring 101 and the second leaf spring 103 together, ensuring that the leaf springs maintain a relatively stable positional relationship during vehicle operation, so that the load can be evenly transmitted to each leaf spring.

[0039] In this embodiment, first leaf spring clips 301 are respectively provided at both ends of the first and second leaf springs 103 to ensure that each leaf spring leaf maintains a stable relative position along its entire length. The first leaf spring clip 301 has a U-shaped structure with its opening facing the side of the leaf spring. The two ends of the first leaf spring clip 301 are fastened with bolts, thereby clamping the first leaf spring 101 and the second leaf spring 103 together, so that the load can be evenly transmitted to each leaf spring leaf, reducing slippage and wear between the leaves.

[0040] like Figure 2As shown: The first leaf spring 101, the second leaf spring 103 and one end of the anti-rebound plate 201 are connected by the second leaf spring clip 302. The second leaf spring clip 302 realizes the reliable connection between the anti-rebound plate 201 and the first and second leaf springs 103, ensuring that the anti-rebound plate 201 can work in coordination with the movement of the first and second leaf springs 103, and give full play to its anti-rebound function.

[0041] like Figure 1 , 2 As shown: The first leaf spring 101, the second leaf spring 103 and the anti-rebound plate 201 are connected by fixing bolts 401. Fixing bolts 401 provide a stable central connection point for the entire leaf spring assembly, ensuring that the components will not loosen or fall off under long-term alternating loads.

[0042] The fixing bolt 401 passes through the center of the first leaf spring 101, each of the second leaf springs 103 and the anti-rebound plate 201. Nuts and washers are provided at both ends of the fixing bolt 401. The components are tightly fixed together by tightening the nuts.

[0043] like Figure 1 As shown: The fixing bolt 401 is located at the center of the first leaf spring 101, the second leaf spring 103 and the anti-rebound plate 201, which can make the load borne by each component evenly distributed around the fixing bolt 401, avoid stress concentration caused by the eccentricity of the connection point, and improve the structural strength and service life of the entire leaf spring assembly.

[0044] The center position setting of the fixing bolt 401 can ensure that the load borne by each component is evenly distributed with respect to the center, avoiding the problem of additional bending moment and stress concentration caused by the eccentricity of the connection point, and improving the structural strength and reliability of the entire leaf spring assembly.

[0045] All the above-mentioned components are manufactured using advanced hot forming, quenching, and tempering processes. During the hot forming process, the forming accuracy is strictly controlled to ensure that the curvature of the first and second leaf springs 103 meets the design requirements. The quenching process uses high-temperature rapid quenching technology to give the spring steel a good martensitic structure, improving its hardness and strength. The tempering process precisely controls the tempering temperature and time according to the material characteristics and product requirements to eliminate quenching stress and improve the toughness and stability of the leaf spring. At the same time, the surface of the leaf spring is shot-peened to form residual compressive stress on the surface of the leaf spring, thereby improving its fatigue life.

[0046] The design employs a primary and secondary structure. The first leaf spring 101 undertakes the main load-bearing task, while the second leaf spring 103 assists the first leaf spring 101 when the vehicle is heavily loaded or encounters a large impact, thereby enhancing the overall load-bearing capacity and buffering performance of the leaf spring. The shape and size of the spring plates are optimized. The first and second leaf springs 103 adopt a variable cross-section design, so that the spring plates have different thicknesses in different parts, thereby improving the material utilization rate and the equal strength performance of the leaf spring.

[0047] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0048] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A special-shaped small mining truck leaf spring assembly, characterized in that: Includes a first leaf spring (101), both ends of which are provided with lugs (102); At least one second leaf spring (103) is stacked on the lower part of the first leaf spring (101); The second leaf spring (103), which is adjacent to the first leaf spring (101), has a lug (104) at one end.

2. The irregular-shaped small mining truck leaf spring assembly as described in claim 1, characterized in that: The second leaf spring (103) at the bottom is provided with an anti-rebound plate (201), both ends of which are bent downward.

3. The irregular-shaped small mining truck leaf spring assembly as described in claim 1, characterized in that: The first leaf spring (101) and the second leaf spring (103) are connected by at least one first leaf spring clip (301).

4. The irregular-shaped small mining truck leaf spring assembly as described in claim 2, characterized in that: The first leaf spring (101), the second leaf spring (103), and one end of the anti-rebound plate (201) are connected by the second leaf spring clip (302).

5. The irregular-shaped small mining truck leaf spring assembly as described in claim 4, characterized in that: The first leaf spring (101), the second leaf spring (103), and the anti-rebound plate (201) are connected by fixing bolts (401).

6. The irregular-shaped small mining truck leaf spring assembly as described in claim 5, characterized in that: The fixing bolt (401) is located at the center of the first leaf spring (101), the second leaf spring (103), and the anti-rebound plate (201).

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