Special-shaped steel plate spring assembly with main and auxiliary new structures

Abstract

The utility model provides a special-shaped steel plate spring assembly with a main structure and an auxiliary structure. The special-shaped steel plate spring assembly comprises a first plate spring piece with uniform sections, a second plate spring piece with variable sections and a third plate spring piece with variable sections, the first plate spring piece, the second plate spring piece and the third plate spring piece are sequentially arranged on the straight section in a stacked mode from top to bottom and are connected in a fastened mode through a center bolt. The length of the first leaf spring is greater than that of the second leaf spring; the straight section of the second leaf spring is longer than the straight section of the first leaf spring, and the radian of the arc-shaped section is smaller than that of the arc-shaped section of the first leaf spring; the length of the straight section of the third leaf spring is not smaller than that of the straight section of the second leaf spring, and the radian of the arc-shaped section is larger than that of the second arc-shaped section; the two ends of the second plate spring piece are wrapped with rubber sleeve noise reduction pads. The special-shaped steel plate spring assembly with the main structure and the auxiliary structure has the advantages of being excellent in roll resistance and driving stability, remarkable in suspension comfort, maximum in traction force and the like, and the requirement that a novel automobile chassis adapts to different vehicle loads can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile leaf spring manufacturing, in particular to a special-shaped main and auxiliary new structure steel leaf spring assembly. Background Art

[0002] Leaf springs are important elastic components in the automobile suspension system. They have the advantages of good reliability, simple structure, short manufacturing process and low cost, so they are widely used in the automotive field. With the development of the times, the automobile market is constantly updating and iterating. Some automobile manufacturers have begun to adopt new automobile chassis with different longitudinal beam thicknesses to suit the total weight of different vehicles. Leaf springs, as the main components of automobile chassis, also need to be updated and iterated. Leaf springs with excellent anti-roll and extraordinary driving stability, significant suspension comfort and maximum traction are needed.

[0003] Traditional leaf springs have many leaves, are heavy, have complex structures, and are difficult to manufacture and maintain. They cannot meet the needs of new automobile chassis at this stage. Therefore, it is necessary to improve automobile leaf springs to adapt to new automobile chassis. Utility Model Content

[0004] In order to better solve the above problems, the utility model provides a special-shaped main and auxiliary new structure steel leaf spring assembly, which has excellent anti-rolling and driving stability, significant suspension comfort and maximum traction, and meets the needs of new automobile chassis to adapt to different vehicle loads.

[0005] To achieve the above-mentioned purpose, the embodiment of the utility model provides a special-shaped main and auxiliary new structure steel leaf spring assembly, including a first leaf spring leaf, a second leaf spring leaf and a third leaf spring leaf; the first leaf spring leaf is a spring leaf of uniform cross-section, including a first straight section and a first arc section extending from the first straight section to both ends, the second leaf spring leaf and the third leaf spring leaf are spring leaves of variable cross-section, the second leaf spring leaf includes a second straight section of uniform cross-section and a second arc section of variable cross-section extending from the second straight section to both ends, the third leaf spring leaf includes a third straight section of uniform cross-section and a third arc section of variable cross-section extending from the third straight section to both ends ; The first leaf spring, the second leaf spring and the third leaf spring are stacked in sequence from top to bottom at the straight section and are fastened together by a central bolt; the length of the first leaf spring is greater than that of the second leaf spring, and both ends of the leaf spring have curling ears; the length of the second straight section is greater than that of the first straight section, and the curvature of the second arc section is less than that of the first arc section, so that there is a crescent-shaped arc gap between the first arc section and the second arc section; the length of the third straight section is not less than that of the second straight section, and the curvature of the third arc section is greater than that of the second arc section; both ends of the second leaf spring are covered with rubber sleeve noise reduction pads.

[0006] Optionally, the curled ears are flat-rolled ears.

[0007] Optionally, the thickness of the second arc-shaped segment gradually decreases from the junction with the second straight segment toward both ends.

[0008] Optionally, the thickness of the third arc segment gradually decreases from the junction with the third straight segment toward both ends.

[0009] The special-shaped main and auxiliary new structure steel leaf spring assembly of the embodiment of the utility model is formed by stacking and fixing a top arc-shaped leaf spring with equal cross-section and two arc-shaped leaf springs with variable cross-section. The overall structure is simple and meets the requirements of lightweight design of leaf springs. The upper two leaf springs in the steel leaf spring assembly are equivalent to the main springs, and the lower leaf spring is equivalent to the auxiliary spring. Under normal and fully loaded conditions of the vehicle, the two leaf springs of the main spring are subjected to force. Under overweight conditions of the vehicle, the two leaf springs of the main spring are pressed to a straight state and contact the leaf spring of the lower auxiliary spring to cause the auxiliary spring to be subjected to force. The design of the special-shaped main and auxiliary new structure steel leaf spring assembly can play a maximum load-bearing role and effectively protect the upper leaf spring, can adapt to the total weight of different vehicles, and also has extraordinary driving stability and remarkable driving comfort. In addition, by arranging a rubber sleeve noise reduction pad, the damage to the leaf spring caused by the contact friction between the leaf springs during the driving of the vehicle can be reduced and the generation of noise can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0011] Figure 1 It is a structural schematic diagram of a special-shaped main and auxiliary new structure steel leaf spring assembly according to an embodiment of the utility model;

[0012] Figure 2 It is a top view of the special-shaped main and auxiliary new structure steel leaf spring assembly of an embodiment of the utility model.

[0013] Reference numerals:

[0014] 1. First leaf spring; 2. Second leaf spring; 3. Third leaf spring; 4. Rubber sleeve noise reduction pad; 5. Roll ear; 6. Center bolt; 7. Nut. DETAILED DESCRIPTION

[0015] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model. Therefore, the utility model is not limited to the basic implementation disclosed below.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0017] like Figure 1-2 As shown, the special-shaped main and auxiliary new structure steel leaf spring assembly of the embodiment of the utility model includes a first leaf spring 1, a second leaf spring 2 and a third leaf spring 3 arranged in sequence from top to bottom. Among them, the first leaf spring 1 is a spring with a constant cross section, including a first straight section in the middle and a first arc section extending symmetrically from the first straight section to both ends; the second leaf spring 2 and the third leaf spring 3 are springs with variable cross sections, the second leaf spring 2 includes a second straight section with a constant cross section in the middle and a second arc section with a variable cross section extending symmetrically from the second straight section to both ends, and the third leaf spring 3 includes a third straight section with a constant cross section in the middle and a third arc section with a variable cross section extending symmetrically from the third straight section to both ends. The three leaf springs are stacked in sequence from top to bottom at the straight section and are fastened and connected by a central bolt 6. Gaskets are arranged between adjacent leaf springs (between adjacent straight sections), and gaskets are also arranged below the first leaf spring 1 and the third leaf spring 3 (above the first straight section and below the third straight section). Bolt through holes are opened at the centers of the three straight sections, and bolt through holes are also opened on the gaskets. The center bolt 6 passes through the through holes on the leaf spring and the gasket in turn and is connected to nuts 7 at both ends, thereby fastening the three leaf springs.

[0018] In this embodiment, the length of the first leaf spring piece 1 is greater than that of the second leaf spring piece 2, and the two ends of the first leaf spring piece 1 have ears 5, which are flat ears, and the center of the ears passes through the neutral layer of the first leaf spring body, and the ear stress is small. The length of the second straight section of the second leaf spring piece 2 is greater than the length of the first straight section of the first leaf spring piece 1, and the curvature of the second arc section is smaller than the curvature of the first arc section, so that the distance between the two second arc sections and the corresponding first arc sections gradually increases and then gradually decreases from the straight section contact point to the two ends, until the two ends of the second leaf spring extend to the bottom end of the first leaf spring; there is a crescent-shaped arc gap between the first arc section and the second arc section, and the gap between the leaf springs can prevent the leaf springs from contacting or fully contacting during the overall vibration of the leaf spring, reduce the friction damage between the leaf springs, reduce noise, and further improve the reliability of the leaf spring. The length of the third straight section of the third leaf spring 3 is not less than the length of the second straight section of the second leaf spring 2, and the curvature of the third arc section is greater than the curvature of the second arc section, so that the distance between the two third arc sections and the corresponding second arc sections gradually increases from the straight section contact point to the two ends. Wherein, the two ends of the second leaf spring 2 (the ends of the two second arc sections) are covered with rubber sleeve noise reduction pads, and when the leaf spring assembly is in a pressure-bearing state, the two ends of the second leaf spring 2 are respectively abutted against the bottom surface of the first leaf spring 1 and the top surface of the third leaf spring 3 through the rubber sleeve noise reduction pads.

[0019] In an optional embodiment, the thickness of the middle straight section of the second leaf spring 2 and the third leaf spring 3 is greater than the thickness of the first leaf spring 1, the thickness of the two second arc sections gradually decreases from the connection with the second straight section to both ends, and the thickness of the two third arc sections gradually decreases from the connection with the third straight section to both ends.

[0020] In actual application scenarios, the leaf spring leaves in the special-shaped main and auxiliary new-structure leaf spring assembly of the utility model embodiment can be made of high-stress hot-rolled special flat steel, and are processed through main processes such as rolling, hot forming, heat treatment, shot peening, punching and assembly. Rib grooves can also be rolled on the leaf spring leaves, which can make adjacent leaf spring leaves fit closely, making the stress distribution between adjacent leaf spring leaves more uniform, with high adaptability, and can avoid dislocation of leaf springs under complex road conditions, thereby ensuring the safety of the vehicle.

[0021] It should be pointed out that, according to the needs of implementation, the various components described in the embodiments of the present 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 the present utility model.

[0022] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A special-shaped main and auxiliary new structure steel leaf spring assembly, characterized in that: It comprises a first leaf spring, a second leaf spring and a third leaf spring; the first leaf spring is a spring of uniform cross-section, comprising a first straight section and a first arc section extending from the first straight section to both ends; the second leaf spring and the third leaf spring are springs of variable cross-section, the second leaf spring comprises a second straight section of uniform cross-section and a second arc section of variable cross-section extending from the second straight section to both ends; the third leaf spring comprises a third straight section of uniform cross-section and a third arc section of variable cross-section extending from the third straight section to both ends; the first leaf spring, the second leaf spring and the third leaf spring are stacked in sequence from top to bottom at the straight section and are fastened and connected by a central bolt; The length of the first leaf spring is greater than that of the second leaf spring, and both ends of the leaf spring have curled ears; the length of the second straight section is greater than that of the first straight section, and the curvature of the second arc section is less than that of the first arc section, so that a crescent-shaped arc gap exists between the first arc section and the second arc section; the length of the third straight section is not less than that of the second straight section, and the curvature of the third arc section is greater than that of the second arc section; both ends of the second leaf spring are covered with rubber sleeve noise reduction pads.

2. The special-shaped main and auxiliary new structure steel leaf spring assembly according to claim 1 is characterized in that: The curled ears are flat curled ears.

3. The special-shaped main and auxiliary new structure steel leaf spring assembly according to claim 1 is characterized in that: The thickness of the second arc segment gradually decreases from the joint with the second straight segment toward both ends.

4. The special-shaped main and auxiliary new structure steel leaf spring assembly according to claim 1 is characterized in that: The thickness of the third arc segment gradually decreases from the point where it connects with the third straight segment toward both ends.

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