Novel passenger car vulcanized steel plate spring assembly

Abstract

The utility model provides a novel passenger car vulcanized steel plate spring assembly which comprises a plurality of plate spring pieces and a fixing mechanism which are sequentially arranged in a laminated mode from top to bottom, abrasion-resistant rubber layers are vulcanized on the surfaces of the plate spring pieces, the fixing mechanism comprises a center bolt assembly and a clamp assembly, and the center bolt assembly comprises a center bolt and a fastening nut. Bolt through holes are formed in the multiple plate spring pieces, and the center bolt sequentially penetrates through the bolt through holes in the multiple plate spring pieces and then is connected with the fastening nut. The clamping hoop assembly comprises clamping hoop pieces arranged on the two sides of the multiple plate spring pieces, and wear-resisting rubber layers are vulcanized on the inner sides of the clamping hoop pieces. According to the novel passenger car vulcanized steel plate spring assembly, contact collision between the plate spring pieces and contact collision between the plate spring pieces and the clamp pieces in the vehicle running process can be avoided, so that noise and contact abrasion between the plate spring pieces and between the plate spring pieces and the clamp pieces are eliminated, the vehicle driving and riding comfort is effectively improved, the fatigue life of the steel plate springs is prolonged, and the service life of the steel plate springs is prolonged. The maintenance and use cost of the steel plate spring is reduced.

Description

Technical Field

[0001] This utility model relates to the field of automotive leaf spring manufacturing technology, specifically to a novel vulcanized steel leaf spring assembly for buses. Background Technology

[0002] Leaf springs are a key component of semi-trailer suspension systems, serving as elastic elements connecting the frame and axles. They offer advantages such as high reliability, simple structure, short manufacturing process, and low cost, leading to their widespread use in the automotive industry. Leaf springs mitigate impact loads transmitted to the vehicle body due to uneven road surfaces, dampen vehicle vibrations, and thus improve ride comfort and the lifespan of related components.

[0003] As people's living standards improve, passengers not only have higher demands for vehicle comfort but also a strong need for reduced noise during operation. Since new energy buses are electrically powered, a significant characteristic is the absence of engine noise. However, the noise generated by the movement of the leaf springs during operation becomes noticeably disruptive to passengers, leading to dissatisfaction. Therefore, corresponding measures must be taken to reduce or eliminate the noise generated by the leaf spring components during vehicle operation, minimizing abnormal noise to a level acceptable to customers. Utility Model Content

[0004] To better address the aforementioned problems, this utility model provides a novel vulcanized steel leaf spring assembly for passenger vehicles, which solves the problems of noise and wear caused by contact and collision between leaf springs during vehicle operation.

[0005] To achieve the above objectives, embodiments of this utility model provide a novel vulcanized steel leaf spring assembly for passenger vehicles, comprising multiple leaf springs and a fixing mechanism stacked sequentially from top to bottom. The surfaces of the multiple leaf springs are vulcanized with a wear-resistant rubber layer. The fixing mechanism includes a central bolt assembly and a clamp assembly. The central bolt assembly includes a central bolt and a fastening nut. Bolt through holes are provided on the multiple leaf springs, and the central bolt passes through the bolt through holes on the multiple leaf springs sequentially and is connected to the fastening nut. The clamp assembly includes clamp members disposed on both sides of the multiple leaf springs, and the inner side of the clamp members is vulcanized with a wear-resistant rubber layer.

[0006] Optionally, the multiple leaf springs have equal cross-sectional areas and their lengths decrease sequentially from top to bottom.

[0007] Optionally, the thickness of the wear-resistant rubber layer is 2-5 mm.

[0008] Optionally, the top leaf spring has fully wrapped lugs at both ends, and the second-top leaf spring has semi-wrapped lugs at both ends that cooperate with the corresponding fully wrapped lugs.

[0009] Optionally, the card assembly includes two sets of clamps, which are respectively provided at both ends of the middle leaf spring and the two ends of the second bottom leaf spring, for fixing the leaf spring clamps between the middle leaf spring and the top leaf spring, and for fixing the leaf spring clamps between the second bottom leaf spring and the top leaf spring.

[0010] Optionally, the clamp includes a U-shaped plate and a screw and nut assembly. The open end of the U-shaped plate has a screw through hole that mates with the screw and nut assembly. The inner side of the U-shaped plate is vulcanized with a wear-resistant rubber layer.

[0011] The novel vulcanized steel leaf spring assembly for passenger vehicles according to this utility model embodiment is composed of multiple leaf springs stacked together and fastened by a central bolt and a clamp assembly. The surface of the leaf springs and the inner side of the clamp are vulcanized with a wear-resistant rubber layer, which can prevent contact and collision between the leaf springs and between the leaf springs and the clamp during vehicle operation. This can eliminate noise between the leaf springs and between the leaf springs and the clamp, effectively improve the driving and riding comfort of the vehicle, and greatly reduce contact wear between the leaf springs, increase the fatigue life of the steel leaf springs, and reduce the maintenance and use costs of the steel leaf springs. Attached Figure Description

[0012] 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.

[0013] Figure 1 This is a schematic diagram of the structure of the novel passenger car vulcanized steel leaf spring assembly according to an embodiment of the present utility model;

[0014] Figure 2 This is a top view of the novel passenger car vulcanized steel leaf spring assembly according to an embodiment of the present utility model;

[0015] Figure 3 This is a schematic diagram of the leaf spring sheet according to an embodiment of the present utility model;

[0016] Figure 4 This is a structural schematic diagram of the clamp component according to an embodiment of the present utility model.

[0017] Figure label:

[0018] 1. Leaf spring; 2. Center bolt; 3. Fastening nut; 4. Clamp; 5. Full-coverage coiled ear; 6. Semi-coverage coiled ear; 7. Wear-resistant rubber layer; 8. U-shaped plate; 9. Screw and nut assembly; 10. Bolt through hole. Detailed Implementation

[0019] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the implementations of the base model disclosed below.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] like Figure 1-4 As shown, the novel passenger car vulcanized steel leaf spring assembly of this utility model includes multiple leaf springs 1 stacked sequentially from top to bottom and a fixing mechanism. The surfaces of the multiple leaf springs 1 are vulcanized with a wear-resistant rubber layer 7. The fixing mechanism includes a central bolt assembly and a clamp assembly. The central bolt assembly includes a central bolt 2 and a fastening nut 3. Bolt through holes 10 are provided on the multiple leaf springs 1. The central bolt 2 passes through the bolt through holes 10 on the multiple leaf springs 1 in sequence and is connected to the fastening nut 3. The clamp assembly includes clamp members 4 disposed on both sides of the multiple leaf springs 1. The inner side of the clamp members 4 is vulcanized with a wear-resistant rubber layer 7.

[0022] In this embodiment of the novel passenger car vulcanized steel leaf spring assembly, the leaf spring 1 undergoes vulcanization treatment, forming a composite noise-reducing leaf spring that integrates the leaf spring with high wear-resistant rubber. Utilizing the non-stickiness, non-breakability, and wear resistance of vulcanized rubber, on the one hand, it can avoid noise generated by the contact and collision of the leaf springs during vehicle operation, eliminating noise during vehicle operation and making the vehicle ride more comfortable, which is more in line with the development trend of low NVH in vehicles; on the other hand, it can greatly reduce the contact wear between the leaf springs, improve the fatigue life of the steel leaf spring, and reduce the maintenance and use costs of the steel leaf spring.

[0023] Optionally, the thickness of the wear-resistant rubber layer 7 is 2-5mm. This thickness of vulcanized rubber ensures that the vulcanized rubber layer does not detach throughout the entire lifespan of the leaf spring, providing noise reduction and wear protection; it also avoids the overall rigidity of the leaf spring being affected by an excessively thick rubber layer. In practical applications, the wear-resistant rubber layer 7 can cover the entire surface area or most of the leaf spring, or it can only cover the main contact wear areas of the leaf spring, such as... Figure 3 As shown, a certain degree of wear-resistant rubber layer 7 can be set in the vulcanization of the leaf spring 1.

[0024] In one optional embodiment, multiple leaf springs 1 have equal cross-sectional areas and their lengths decrease sequentially from top to bottom, forming an inverted triangular shape for the overall leaf spring assembly. Among the multiple leaf springs, the top leaf spring has fully enclosed lugs 5 at both ends, which are arc-shaped structures formed by extending outwards from the left and right ends of the top leaf spring; the second-top leaf spring has semi-enclosed lugs 6 at both ends that cooperate with the corresponding fully enclosed lugs, which are semi-circular arc-shaped structures formed by extending outwards from the left and right ends of the second-top leaf spring.

[0025] Furthermore, the card assembly includes two sets of clamping members 4, respectively disposed at both ends of the middle leaf spring and the second-bottom leaf spring, for securing the leaf springs between the middle and top leaf springs, and between the second-bottom and top leaf springs. In this embodiment, there are eight leaf springs 1, and the two sets of clamping members are respectively disposed at both ends of the third and seventh leaf springs; in other embodiments, if the number of leaf springs is small, one set of clamping members can be provided; if the number of leaf springs is large, three or four sets of clamping members can be provided, as long as the clamping members cooperate with the central fastening bolt to stably fasten and connect multiple leaf springs.

[0026] Optionally, such as Figure 4 As shown, the clamp 4 includes a U-shaped plate 8 and a screw and nut assembly 9. The open end of the U-shaped plate 8 is provided with a screw through hole that mates with the screw and nut assembly 9. The inner side of the U-shaped plate 8 is vulcanized with a wear-resistant rubber layer 7.

[0027] In practical applications, the leaf springs in the novel passenger car vulcanized steel leaf spring assembly of this utility model embodiment can be made of high-stress hot-rolled spring flat steel, processed through main processes such as end rolling, hot forming, heat treatment, shot peening, vulcanization, and assembly. The two ends can be rolled with pressure grooves (which are then integrated with the rubber vulcanization after rolling), which can make adjacent leaf springs fit tightly together, making the stress distribution between adjacent springs more uniform, with high adaptability, and can avoid leaf spring misalignment under complex road conditions, thus ensuring vehicle safety.

[0028] It should be noted that, depending on the implementation needs, the various components described in the embodiments of this utility model can be split into more components, or two or more components or parts of components can be combined into new components to achieve the purpose of the embodiments of this utility model.

[0029] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A new type of bus vulcanized steel plate spring assembly, comprising a plurality of plate spring pieces and a fixing mechanism which are stacked in order from top to bottom, characterized in that, The surface of the plurality of leaf springs is vulcanized with a wear-resistant rubber layer, the fixing mechanism comprises a center bolt assembly and a clamp assembly, the center bolt assembly comprises a center bolt and a fastening nut, bolt through holes are formed in the plurality of leaf springs, and the center bolt is connected with the fastening nut after sequentially penetrating the bolt through holes in the plurality of leaf springs; the clamp assembly comprises clamp pieces arranged on both sides of the plurality of leaf springs, and the inner side of the clamp pieces is vulcanized with a wear-resistant rubber layer; the clamp assembly comprises two groups of clamp pieces, which are arranged at the two ends of the middle leaf spring and the two ends of the second bottom leaf spring respectively, and are used for fixing the leaf spring clamps between the middle leaf spring and the top leaf spring and fixing the leaf spring clamps between the second bottom leaf spring and the top leaf spring.

2. A new type of bus leaf spring assembly according to claim 1, characterized in that, The cross-sectional areas of the plurality of leaf springs are equal, and the lengths decrease from top to bottom.

3. A new type of bus leaf spring assembly according to claim 1, characterized in that, The thickness of the wear-resistant rubber layer is 2-5 mm.

4. A new type of bus leaf spring assembly according to claim 1, characterized in that, The two ends of the top leaf spring of the plurality of leaf springs have full wrapping ears, and the two ends of the second top leaf spring have half wrapping ears matched with the corresponding full wrapping ears.

5. A new type of bus leaf spring assembly according to claim 1, characterized in that, The clamp piece comprises a U-shaped plate and a screw nut assembly, a screw through hole matched with the screw nut assembly is formed at the open end of the U-shaped plate, and the inner side of the U-shaped plate is vulcanized with a wear-resistant rubber layer.

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