Semitrailer suspension plate spring and axle tube connecting structure

Abstract

The utility model provides a connecting structure of a semitrailer suspension plate spring and an axle tube, which belongs to the technical field of plate spring accessories and comprises a first fixing plate, a second fixing plate and a U-shaped bolt, the first fixing plate is positioned in the middle of a longest steel plate of the plate spring, and the second fixing plate is positioned on one side, far away from the first fixing plate, of the plate spring. Mounting holes are formed in the four corners of the first fixing plate and the four corners of the second fixing plate and located in the two sides of the plate spring, the number of the U-shaped bolts is two, the two U-shaped bolts penetrate through the mounting holes in the first fixing plate and the mounting holes in the second fixing plate correspondingly, and the shaft tube is fixed to the second fixing plate through the U-shaped bolts. A shock pad is further arranged between the second fixing plate and the shaft tube, and the U-shaped bolt located on one side of the first fixing plate is tightened and fixed through a locking nut. The direct impact pressure of the plate spring on the axle tube is buffered and damped through the damping pad, the direct pressure of the plate spring on the axle tube is reduced, the service life of the axle tube is prolonged, and the overall structure is simple.

Description

Technical Field

[0001] The utility model relates to the technical field of leaf spring accessories, in particular to a semitrailer suspension leaf spring and axle tube connection structure. Background Art

[0002] Patent Publication (Announcement) No.: CN215244208U discloses a connection structure between a semi-trailer suspension leaf spring and an axle tube. Through an elastic block and an arc-shaped support plate, the force is better dispersed when the leaf spring is subjected to external pressure, the direct pressure on the axle tube is reduced, the shock absorption effect is improved, and the semi-trailer is more stable during operation. However, the overall structure is complex, and the elastic block, support plate, and sliding assembly will increase the installation and maintenance costs. The elastic block and the sliding assembly are prone to damage during long-term use. After damage, due to the heavy weight of the semi-trailer suspension leaf spring and the axle tube, replacement is very inconvenient. Therefore, a connection structure between a semi-trailer suspension leaf spring and an axle tube with a simple structure and the ability to reduce direct pressure on the axle tube is needed. Utility Model Content

[0003] The purpose of the utility model is to provide a semi-trailer suspension leaf spring and axle tube connection structure in response to the defects of the prior art. The axle tube is fixed to the leaf spring by a U-bolt and a second fixing plate, and the direct impact pressure of the leaf spring on the axle tube is buffered and damped by a shock-absorbing pad, thereby reducing the direct pressure of the leaf spring on the axle tube, increasing the service life of the axle tube, and having a simple overall structure.

[0004] In order to achieve the above purpose, the following technical solutions are adopted:

[0005] A semi-trailer suspension leaf spring and axle tube connection structure, comprising: a first fixing plate, a second fixing plate and a U-shaped bolt, the first fixing plate is located in the middle of the longest steel plate of the leaf spring, the length of the first fixing plate is greater than the steel plate width of the leaf spring, the second fixing plate is located on a side of the leaf spring away from the first fixing plate, the first fixing plate and the second fixing plate clamp the leaf spring in the middle, four corners of the first fixing plate and the second fixing plate are provided with mounting holes, the mounting holes are located on both sides of the leaf spring, there are two U-shaped bolts, the two U-shaped bolts pass through the mounting holes on the first fixing plate and the second fixing plate respectively, an arc-shaped end of the U-shaped bolt is located on one side of the shortest steel plate of the leaf spring, the U-shaped bolt fixes the axle tube to the second fixing plate, a shock-absorbing pad is also provided between the second fixing plate and the axle tube, and the U-shaped bolt located on one side of the first fixing plate is tightened and fixed by a locking nut.

[0006] As a further preferred embodiment, one side of the shock absorbing pad is fixedly connected to the second fixing plate, the side of the shock absorbing pad away from the second fixing plate is an arc-shaped surface, the size of the arc is the same as the arc size of the shaft tube, and an anti-slip layer is provided on the arc-shaped surface.

[0007] As a further preferred embodiment, the first fixing plate and the second fixing plate have the same shape and size, both are rectangular plates, and the first fixing plate and the second fixing plate are parallel to each other.

[0008] As further preferred, the length of the shock absorbing pad is equal to the distance between the two U-bolts, and the width of the shock absorbing pad is equal to the diameter of the shaft tube.

[0009] As further preferred, the first fixing plate and the second fixing plate are axially symmetrical about the center line of the leaf spring.

[0010] As a further preferred embodiment, the U-shaped bolt is perpendicular to the first fixing plate and the second fixing plate, and the U-shaped bolt is respectively located on both sides of the leaf spring.

[0011] As a further preferred embodiment, the first fixing plate is fixedly connected to the middle portion of the longest steel plate of the leaf spring, and the second fixing plate is fixedly connected to the middle portion of the shortest steel plate of the leaf spring.

[0012] Compared with the prior art, the utility model has the following advantages and positive effects:

[0013] (1) The present application fixes the axle tube on the leaf spring through U-bolts and the second fixing plate, and fixes the axle tube in the middle position of the leaf spring through the first fixing plate and the second fixing plate. The overall structure is simple. Finally, the direct impact pressure of the leaf spring on the axle tube is buffered and shock-absorbing through the shock-absorbing pad, thereby reducing the direct pressure of the leaf spring on the axle tube and improving the service life of the axle tube. The overall structure is simple and convenient for installation and disassembly. It is also convenient to replace the shock-absorbing pad, thereby improving the service life of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0015] Figure 1 It is a stereogram of embodiment 1 of the utility model.

[0016] Figure 2 It is a three-dimensional diagram of the shock-absorbing pad in Example 1 of the utility model.

[0017] In the figure, 1, the first fixing plate, 2, the second fixing plate, 3, the U-bolt, 4, the shock-absorbing pad, 5, the leaf spring, 6, the shaft tube, 7, the locking nut, and 8, the anti-slip layer. DETAILED DESCRIPTION

[0018] Example 1

[0019] In a typical implementation of the present invention, Figure 1-Figure 2As shown, a connection structure between a semi-trailer suspension leaf spring and an axle tube 6 is provided.

[0020] The invention comprises: a first fixing plate 1, a second fixing plate 2 and a U-shaped bolt 3, wherein the first fixing plate 1 is located in the middle of the longest steel plate of the leaf spring 5, the length of the first fixing plate 1 is greater than the steel plate width of the leaf spring 5, the second fixing plate 2 is located on the side of the leaf spring 5 away from the first fixing plate 1, the first fixing plate 1 and the second fixing plate 2 clamp the leaf spring 5 in the middle, the four corners of the first fixing plate 1 and the second fixing plate 2 are provided with mounting holes, and the mounting holes are located on both sides of the leaf spring 5, there are two U-shaped bolts 3, the two U-shaped bolts 3 pass through the mounting holes on the first fixing plate 1 and the second fixing plate 2 respectively, and one arc-shaped end of the U-shaped bolt 3 is located on the side of the shortest steel plate of the leaf spring 5, the U-shaped bolt 3 fixes the shaft tube 6 on the second fixing plate 2, and a shock-absorbing pad 4 is also provided between the second fixing plate 2 and the shaft tube 6, the shock-absorbing pad 4 is made of rubber, which is cheap and durable, and the U-shaped bolt 3 located on one side of the first fixing plate 1 is tightened and fixed by a locking nut 7. In this way, the shaft tube 6 can be fixed by the U-bolt 3 and the second fixing plate 2, and shock-absorbing by the shock-absorbing pad 4, so that effective buffering can be performed between the leaf spring 5, the second fixing plate 2 and the shaft tube 6, preventing the force on the leaf spring 5 from being directly transmitted to the shaft tube 6 through the rigid connection, thereby damaging the shaft tube 6 and ensuring the service life of the shaft tube 6.

[0021] like Figure 2 As shown, one side of the shock-absorbing pad 4 is fixedly connected to the second fixed plate 2, and the side of the shock-absorbing pad 4 away from the second fixed plate 2 is an arc-shaped surface, the size of the arc is the same as the arc size of the shaft tube 6, and an anti-slip layer 8 is provided on the arc-shaped surface, which can facilitate the installation of the shock-absorbing pad 4.

[0022] like Figure 1 As shown, the first fixing plate 1 and the second fixing plate 2 have the same shape and size, both are rectangular plates, and the first fixing plate 1 and the second fixing plate 2 are parallel to each other.

[0023] like Figure 1 As shown, the length of the shock-absorbing pad 4 is equal to the distance between the two U-shaped bolts 3, and the width of the shock-absorbing pad 4 is equal to the diameter of the shaft tube 6, so that the shock-absorbing pad 4 can be fixed by the two U-shaped bolts 3 to prevent the shock-absorbing pad 4 from falling off from between the second fixing plate 2 and the shaft tube 6.

[0024] like Figure 1 As shown, the first fixing plate 1 and the second fixing plate 2 are axially symmetrical with respect to the center line of the leaf spring 5 .

[0025] like Figure 1 As shown, the U-shaped bolt 3 is perpendicular to the first fixing plate 1 and the second fixing plate 2 , and the U-shaped bolt 3 is located on both sides of the leaf spring 5 .

[0026] like Figure 1 As shown, the first fixing plate 1 is fixedly connected to the middle part of the longest steel plate of the leaf spring 5 , and the second fixing plate 2 is fixedly connected to the middle part of the shortest steel plate of the leaf spring 5 .

[0027] In the technical solution of the present application, the middle position of the leaf spring 5 is fixed by the first fixing plate 1 and the second fixing plate 2 to locate the center position of the leaf spring 5, and then the shaft tube 6 is fixed between the U-bolt 3 and the second fixing plate 2 by the U-bolt 3. In this way, the shaft tube 6 can be fixed in the middle position of the leaf spring 5 by the two fixing plates and the U-bolt 3. Finally, the shock-absorbing pad 4 between the second fixing plate 2 and the shaft tube 6 is used for buffering. In this way, the shaft tube 6 and the leaf spring 5 can be fixedly connected while being buffered by the shock-absorbing pad 4. The rigid impact between the leaf spring 5 and the shaft tube 6 is buffered by the shock-absorbing pad 4, thereby reducing the direct pressure of the leaf spring 5 on the shaft tube 6 and improving the service life of the shaft tube 6.

[0028] After the shock-absorbing pad 4 has been used for a long time and has aged, the locking nut 7 can be unscrewed to move the U-bolt 3 away from the leaf spring 5, thereby increasing the distance between the second fixing plate 2 and the shaft tube 6. At this time, the shock-absorbing pad 4 can be removed and a new shock-absorbing pad 4 can be inserted, and finally the locking nut 7 can be tightened. The overall structure is simple, and it is very simple to replace the shock-absorbing pad 4, thereby improving the efficiency of maintenance.

[0029] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A semi-trailer suspension leaf spring and axle tube connection structure, characterized in that: include: A first fixing plate, a second fixing plate and a U-shaped bolt, wherein the first fixing plate is located in the middle of the longest steel plate of the leaf spring, the length of the first fixing plate is greater than the steel plate width of the leaf spring, the second fixing plate is located on a side of the leaf spring away from the first fixing plate, the first fixing plate and the second fixing plate clamp the leaf spring in the middle, four corners of the first fixing plate and the second fixing plate are provided with mounting holes, the mounting holes are located on both sides of the leaf spring, there are two U-shaped bolts, the two U-shaped bolts pass through the mounting holes on the first fixing plate and the second fixing plate respectively, an arc-shaped end of the U-shaped bolt is located on one side of the shortest steel plate of the leaf spring, the U-shaped bolt fixes the shaft tube to the second fixing plate, a shock-absorbing pad is also provided between the second fixing plate and the shaft tube, and the U-shaped bolt located on one side of the first fixing plate is tightened and fixed by a locking nut; One side of the shock-absorbing pad is fixedly connected to the second fixing plate, and the side of the shock-absorbing pad away from the second fixing plate is an arc-shaped surface, the size of the arc is the same as the size of the arc of the shaft tube, and an anti-slip layer is provided on the arc-shaped surface; The shock-absorbing pad is made of rubber.

2. A semi-trailer suspension leaf spring and axle tube connection structure as claimed in claim 1, characterized in that: The first fixing plate and the second fixing plate have the same shape and size, both of which are rectangular plates, and the first fixing plate and the second fixing plate are parallel to each other.

3. A semi-trailer suspension leaf spring and axle tube connection structure as claimed in claim 1, characterized in that: The length of the shock-absorbing pad is equal to the distance between the two U-bolts, and the width of the shock-absorbing pad is equal to the diameter of the shaft tube.

4. A semitrailer suspension leaf spring and axle tube connection structure as claimed in claim 1, characterized in that: The first fixing plate and the second fixing plate are axially symmetrical about the center line of the leaf spring.

5. The semi-trailer suspension leaf spring and axle tube connection structure according to claim 1, characterized in that: The U-shaped bolts are perpendicular to the first fixing plate and the second fixing plate, and the U-shaped bolts are respectively located on both sides of the leaf spring.

6. A semitrailer suspension leaf spring and axle tube connection structure as claimed in claim 1, characterized in that: The first fixing plate is fixedly connected to the middle portion of the longest steel plate of the leaf spring, and the second fixing plate is fixedly connected to the middle portion of the shortest steel plate of the leaf spring.

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