Steel plate spring structure of new energy commercial vehicle

Abstract

The invention discloses a steel plate spring structure of a new energy commercial vehicle. The steel plate spring structure comprises a first leaf spring, a second leaf spring, a third leaf spring, a noise reduction assembly and a limiting assembly. First mounting holes are formed in the two ends of the second leaf spring, and second mounting holes are correspondingly formed in the two ends of the third leaf spring; the first noise reduction pad is arranged in the first mounting hole and extends to the position between the first leaf spring and the second leaf spring, and the second noise reduction pad is arranged in the second mounting hole and extends to the position between the second leaf spring and the third leaf spring; the limiting assembly is used for limiting the first leaf spring, the second leaf spring and the third leaf spring. The first noise reduction pad is arranged between the first leaf spring and the second leaf spring, the second noise reduction pad is arranged between the second leaf spring and the third leaf spring, and the first leaf spring, the second leaf spring and the third leaf spring are limited through the limiting assembly. The problems of abnormal sound and potential safety hazards of an existing plate spring can be solved in all directions, and the purpose of light weight is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive parts, and more specifically, to a leaf spring structure for new energy commercial vehicles. Background Art

[0002] At present, the leaf springs of general light commercial vehicle trucks are multi-leaf springs, with simple production and assembly processes and good load-bearing capacity. With the popularization of electrification, lightweight and noiseless comfort are becoming increasingly important in terms of energy consumption and endurance, as well as driving experience.

[0003] However, after the main and auxiliary leaf springs of the existing light commercial vehicle truck leaf springs come into contact and the noise reduction pads at the ends of the auxiliary leaf springs are worn, the gap between the main and auxiliary leaf spring plates decreases, resulting in problems such as abnormal noise and potential safety hazards caused by the contact and collision between the auxiliary leaf spring and the round head of the clamp rivet.

[0004] Therefore, how to provide a leaf spring structure for new energy commercial vehicles has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] An object of the present invention is to provide a new technical solution for a leaf spring structure for new energy commercial vehicles.

[0006] According to a first aspect of the present invention, there is provided a leaf spring structure for new energy commercial vehicles, comprising: a first leaf spring, a second leaf spring, a third leaf spring, a noise reduction component, and a limiting component;

[0007] The first leaf spring, the second leaf spring, and the third leaf spring are arranged in sequence from top to bottom. Both ends of the second leaf spring are provided with first mounting holes, and corresponding second mounting holes are provided at both ends of the third leaf spring;

[0008] The noise reduction component includes a first noise reduction pad and a second noise reduction pad. The first noise reduction pad is arranged in the first mounting hole and extends between the first leaf spring and the second leaf spring. The second noise reduction pad is arranged in the second mounting hole and extends between the second leaf spring and the third leaf spring;

[0009] The limiting component is used to limit the first leaf spring, the second leaf spring, and the third leaf spring.

[0010] Optionally, the length of the first noise reduction pad is equal to the length of the second noise reduction pad, and the thickness of the first noise reduction pad is less than the thickness of the second noise reduction pad.

[0011] Optionally, both ends of the first leaf spring are rolled to form eyelets, and bushings are placed inside the eyelets for connection with the vehicle body of the new energy commercial vehicle through the bushings.

[0012] Optionally, both ends of the second leaf spring are rolled to form arc-shaped portions, the diameter of the arc-shaped portions is larger than the diameter of the coil ears, and there is a spacing between the arc-shaped portions and the coil ears.

[0013] Optionally, the limiting component includes a U-shaped bolt and a backing plate. The U-shaped bolt sleeves the middle positions of the first leaf spring, the second leaf spring, and the third leaf spring. The backing plate is located at the top of the first leaf spring and the bottom of the third leaf spring, and the U-shaped bolt abuts against the backing plate.

[0014] Optionally, the limiting component further includes a C-shaped hoop and a third noise reduction pad. The third noise reduction pad is located on the inner wall of the C-shaped hoop, and the C-shaped hoop wraps the first end of the first leaf spring and the first end of the second leaf spring.

[0015] Optionally, the limiting component further includes a U-shaped clamp and a fourth noise reduction pad. The fourth noise reduction pad is located on the inner wall of the U-shaped clamp, and the U-shaped clamp wraps the second end of the first leaf spring, the second end of the second leaf spring, and the second end of the third leaf spring.

[0016] The beneficial effects of the present invention are as follows:

[0017] In the present invention, the first leaf spring, the second leaf spring, and the third leaf spring are arranged in sequence from top to bottom. The first noise reduction pad is arranged in the first mounting hole and extends between the first leaf spring and the second leaf spring. The second noise reduction pad is arranged in the second mounting hole and extends between the second leaf spring and the third leaf spring. By respectively arranging the first noise reduction pad and the second noise reduction pad between the first leaf spring and the second leaf spring and between the second leaf spring and the third leaf spring, and by the common action of the limiting component to limit the first leaf spring, the second leaf spring, and the third leaf spring, the problems of abnormal noise and safety hazards of the existing leaf spring can be solved comprehensively, and the purpose of lightweight is achieved.

[0018] Other features and advantages of the present invention will become clear from the following detailed description of the exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings incorporated in the specification and constituting a part of the specification illustrate embodiments of the present invention and, together with the description, are used to explain the principles of the present invention.

[0020] Figure 1 is a structural diagram of the leaf spring structure of the new energy commercial vehicle of the present invention;

[0021] Figure 2 is a structural diagram of the noise reduction component of the present invention;

[0022] Figure 3 is a structural diagram of the limiting component of the present invention.

[0023] The markings in the figure are as follows: 1. The first leaf spring; 11. The coiled ear; 2. The second leaf spring; 21. The arc portion; 3. The third leaf spring; 4. The noise reduction component; 41. The first noise reduction pad; 42. The second noise reduction pad; 5. The limiting component; 51. The U-bolt; 52. The backing plate; 53. The C-shaped hoop; 54. The third noise reduction pad; 55. The U-shaped clamp; 56. The fourth noise reduction pad. Detailed implementation mode

[0024] Now, various exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that: unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0025] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way a limitation on the present invention or its application or use.

[0026] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the specification.

[0027] In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

[0028] As Figures 1 to 3 shown, the embodiment of the present invention provides a leaf spring structure for a new energy commercial vehicle, including: a first leaf spring 1, a second leaf spring 2, a third leaf spring 3, a noise reduction component 4, and a limiting component 5.

[0029] The first leaf spring 1, the second leaf spring 2, and the third leaf spring 3 are arranged in sequence from top to bottom. Both ends of the second leaf spring 2 are provided with first mounting holes, and corresponding second mounting holes are provided at both ends of the third leaf spring 3. Specifically, both ends of the first leaf spring 1 are connected to the vehicle body of the new energy commercial vehicle.

[0030] The noise reduction component 4 includes a first noise reduction pad 41 and a second noise reduction pad 42. The first noise reduction pad 41 is arranged in the first mounting hole and extends between the first leaf spring 1 and the second leaf spring 2. The second noise reduction pad 42 is arranged in the second mounting hole and extends between the second leaf spring 2 and the third leaf spring 3.

[0031] The limiting component 5 is used to limit the first leaf spring 1, the second leaf spring 2, and the third leaf spring 3.

[0032] In the present invention, the first leaf spring 1, the second leaf spring 2, and the third leaf spring 3 are arranged in sequence from top to bottom. The first noise reduction pad 41 is arranged in the first mounting hole and extends between the first leaf spring 1 and the second leaf spring 2. The second noise reduction pad 42 is arranged in the second mounting hole and extends between the second leaf spring 2 and the third leaf spring 3. By respectively arranging the first noise reduction pad 41 and the second noise reduction pad 42 between the first leaf spring 1 and the second leaf spring 2 and between the second leaf spring 2 and the third leaf spring 3, and by the limiting component 5 limiting the first leaf spring 1, the second leaf spring 2, and the third leaf spring 3, the problems of the existing leaf spring abnormal noise and potential safety hazards can be solved comprehensively, and the purpose of lightweight is achieved.

[0033] In an embodiment of the leaf spring structure of the new energy commercial vehicle of the present invention, as Figure 2 and Figure 3 shown, the length of the first noise reduction pad 41 is equal to the length of the second noise reduction pad 42, and the thickness of the first noise reduction pad 41 is less than the thickness of the second noise reduction pad 42.

[0034] Specifically, the thickness of the first noise reduction pad 41 is greater than the distance between the first leaf spring 1 and the second leaf spring 2, thereby reducing the probability of collision between the first leaf spring 1 and the second leaf spring 2.

[0035] The thickness of the second noise reduction pad 42 is less than the distance between the second leaf spring 2 and the third leaf spring 3, and the second noise reduction pad 42 is arranged at the end of the third leaf spring 3, thereby enabling a certain movement space between the second leaf spring 2 and the third leaf spring 3 and improving the shock absorption effect.

[0036] In an embodiment of the leaf spring structure of the new energy commercial vehicle of the present invention, as Figures 1 to 3 shown, in order to improve the connection stability between the first leaf spring 1 and the vehicle body of the new energy commercial vehicle, both ends of the first leaf spring 1 are rolled to form a coil ear 11, and a bushing is placed inside the coil ear 11, and the vehicle body of the new energy commercial vehicle is connected through the bushing.

[0037] In an embodiment of the leaf spring structure of the new energy commercial vehicle of the present invention, both ends of the second leaf spring 2 are rolled to form an arc portion 21, the diameter of the arc portion 21 is greater than the diameter of the coil ear 11, and there is a distance between the arc portion 21 and the coil ear 11.

[0038] Specifically, in the present invention, by making the diameter of the arc portion 21 at both ends of the second leaf spring 2 greater than the diameter of the coil ear 11 and arranging a distance between the arc portion 21 and the coil ear 11, while improving the mechanical strength of the leaf spring structure of the new energy commercial vehicle of the present invention, it has a limiting effect on the first leaf spring 1.

[0039] In an embodiment of the leaf spring structure of the new energy commercial vehicle of the present invention, as Figure 1As shown in the figure, the limiting component 5 includes a U-shaped bolt 51 and a backing plate 52. The U-shaped bolt 51 is sleeved at the middle positions of the first leaf spring 1, the second leaf spring 2, and the third leaf spring 3. The backing plate 52 is located at the top of the first leaf spring 1 and the bottom of the third leaf spring 3, and the U-shaped bolt 51 abuts against the backing plate 52.

[0040] Specifically, the backing plate 52 is also arranged between the first leaf spring 1 and the second leaf spring 2, and between the second leaf spring 2 and the third leaf spring 3.

[0041] In the present invention, by sleeving the U-shaped bolt 51 at the middle positions of the first leaf spring 1, the second leaf spring 2, and the third leaf spring 3, the backing plate 52 is placed between the U-shaped bolt 51 and the first leaf spring 1 and the second leaf spring 2. The first leaf spring 1, the second leaf spring 2, and the third leaf spring 3 are fixed through the extrusion action of the U-shaped bolt 51, further improving the stability of the leaf spring structure of the new energy commercial vehicle of the present invention.

[0042] In an embodiment of the leaf spring structure of the new energy commercial vehicle of the present invention, as Figure 2 shown, the limiting component 5 further includes a C-shaped hoop 53 and a third noise reduction pad 54. The third noise reduction pad 54 is located on the inner wall of the C-shaped hoop 53, and the C-shaped hoop 53 wraps the first ends of the first leaf spring 1 and the second leaf spring 2.

[0043] Specifically, the C-shaped hoop 53 is fixed to the first leaf spring 1 and the second leaf spring 2 by countersunk head rivets.

[0044] In the present invention, by arranging the third noise reduction pad 54 on the inner wall of the C-shaped hoop 53 and making the C-shaped hoop 53 wrap the first ends of the first leaf spring 1 and the second leaf spring 2, the present invention only installs the C-shaped hoop 53 on the first ends of the first leaf spring 1 and the second leaf spring 2, reducing the weight of the leaf spring structure, and also being able to limit the first leaf spring 1 and the second leaf spring 2 in the vertical and horizontal misalignment directions, achieving the purpose of lightweight.

[0045] In an embodiment of the leaf spring structure of the new energy commercial vehicle of the present invention, as Figure 3 shown, the limiting component 5 further includes a U-shaped clamp 55 and a fourth noise reduction pad 56. The fourth noise reduction pad 56 is located on the inner wall of the U-shaped clamp 55, and the U-shaped clamp 55 wraps the second ends of the first leaf spring 1, the second leaf spring 2, and the third leaf spring 3.

[0046] In the present invention, by locating the fourth noise reduction pad 56 on the inner wall of the U-shaped clamp 55 and the U-shaped clamp 55 wrapping the second ends of the first leaf spring 1, the second leaf spring 2, and the third leaf spring 3, the U-shaped clamp 55 is used to limit the first leaf spring 1, the second leaf spring 2, and the third leaf spring 3, further solving the problem of spring abnormal noise.

[0047] Although some specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and not for limiting the scope of the present invention. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A leaf spring structure for a new energy commercial vehicle, characterized in that: include: A first leaf spring, a second leaf spring, a third leaf spring, a noise reduction assembly and a limit assembly; The first leaf spring, the second leaf spring and the third leaf spring are arranged in sequence from top to bottom, the two ends of the second leaf spring are provided with first mounting holes, and the two ends of the third leaf spring are correspondingly provided with second mounting holes; The noise reduction assembly includes a first noise reduction pad and a second noise reduction pad, the first noise reduction pad is arranged in the first mounting hole and extends between the first leaf spring and the second leaf spring, the second noise reduction pad is arranged in the second mounting hole and extends between the second leaf spring and the third leaf spring; The limiting assembly is used to limit the first leaf spring, the second leaf spring and the third leaf spring.

2. The leaf spring structure for new energy commercial vehicles according to claim 1, characterized in that: The length of the first noise reduction pad is equal to the length of the second noise reduction pad, and the thickness of the first noise reduction pad is less than the thickness of the second noise reduction pad.

3. The leaf spring structure for new energy commercial vehicles according to claim 1, characterized in that: Both ends of the first leaf spring are rolled to form ears, and the interior of the ears is used to place bushings, which are connected to the body of the new energy commercial vehicle through the bushings.

4. The leaf spring structure for new energy commercial vehicles according to claim 3 is characterized in that: Both ends of the second leaf spring are rolled to form an arc-shaped portion, the diameter of the arc-shaped portion is greater than the diameter of the rolled ear, and there is a distance between the arc-shaped portion and the rolled ear.

5. The leaf spring structure for new energy commercial vehicles according to claim 1, characterized in that: The limiting assembly includes a U-shaped bolt and a pad. The U-shaped bolt is sleeved in the middle position of the first leaf spring, the second leaf spring and the third leaf spring. The pad is located at the top of the first leaf spring and the bottom of the third leaf spring, and the U-shaped bolt abuts against the pad.

6. The leaf spring structure for new energy commercial vehicles according to claim 5, characterized in that: The limiting assembly also includes a C-shaped hoop and a third noise reduction pad, wherein the third noise reduction pad is located on the inner wall of the C-shaped hoop, and the C-shaped hoop wraps the first end of the first leaf spring and the first end of the second leaf spring.

7. The leaf spring structure for new energy commercial vehicles according to claim 5, characterized in that: The limiting assembly also includes a U-shaped clamp and a fourth noise reduction pad, the fourth noise reduction pad is located on the inner wall of the U-shaped clamp, and the U-shaped clamp wraps the second end of the first leaf spring, the second end of the second leaf spring and the second end of the third leaf spring.

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