Arc-shaped compound rear steel plate spring

Abstract

The utility model relates to the technical field of steel plate springs, and discloses an arc-shaped compound rear steel plate spring which comprises a first steel plate, the bottom end of the first steel plate is fixedly connected with a second steel plate, a third steel plate, a fourth steel plate, a fifth steel plate and a sixth steel plate in sequence, and bolts are installed in the middles of the inner walls of the first steel plate to the sixth steel plate. Nuts are installed on the upper sides of the outer walls of the bolts, a plurality of heat dissipation holes are formed between the first steel plate to the sixth steel plate, ventilation holes are formed in the sides, corresponding to the heat dissipation holes, of the inner walls of the protection plates, clamping grooves are formed in the left side and the right side of the opposite ends of the protection plates, and dustproof assemblies are installed on the inner walls of the ventilation holes. Limiting assemblies are installed on the left side and the right side of the bottom end of the third steel plate. According to the steel plate spring, the effect of protecting the two sides of the steel plate spring by the protecting plate is not affected, meanwhile, the gas circulation of the heat dissipation holes can be further improved, and the heat dissipation effect on the steel plate spring is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of leaf springs, in particular to an arc-shaped compound rear leaf spring. Background Art

[0002] Leaf springs are a common mechanical elastic element, which is usually composed of one or more thin steel plates. Leaf springs are widely used in various industries, such as the automotive industry, mechanical equipment, electronic equipment, furniture, etc. They are often used in suspension systems, shock absorbers, pressure sensors, switch trigger mechanisms, etc.

[0003] After searching, a rear leaf spring for a truck with announcement number CN211259446U includes steel plates one to six, which are stacked in sequence from bottom to top, with ears welded at both ends of steel plate five, and rolled ears welded at both ends of steel plate six, with fixing frames installed on both sides of steel plate three, with threaded hole one cut on both sides of the fixing frame, with fixing bolts installed inside the threaded hole one, and fixing nuts installed at one end of the fixing bolts, with threaded hole two drilled at the center of steel plates one to six, with connecting bolts installed inside the threaded hole two, and connecting nuts installed at one end of the connecting bolts, and protective plates installed on both sides of steel plates one to six. The rear leaf spring for a truck has a novel design, a reasonable structure, and diverse functions.

[0004] Based on the above patent, the protective plate can reduce the intrusion of dust, dirt and water, slow down the time of rust and aging of the spring steel plate, thereby realizing the functions of rust prevention, corrosion prevention and aging prevention of the spring steel plate. However, the protective plate is installed at both ends of the leaf spring, which will block the two sides of the heat dissipation hole, which is not conducive to the gas flow before and after the heat dissipation hole, so the heat dissipation effect is weak. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings existing in the prior art, and to propose an arc-shaped compound rear leaf spring, which does not affect the protective effect of the guard plate on both sides of the leaf spring, and can further improve the gas flowability of the heat dissipation hole, thereby improving the heat dissipation effect of the leaf spring.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A curved compound rear leaf spring comprises a first steel plate, wherein a second steel plate, a third steel plate, a fourth steel plate, a fifth steel plate and a sixth steel plate are fixedly connected to the bottom end of the first steel plate in sequence, a bolt is installed in the middle of the inner wall of the first to sixth steel plates, a nut is installed on the upper side of the outer wall of the bolt, guard plates are installed at both the front and rear ends of the first to sixth steel plates, a plurality of heat dissipation holes are provided between the two steel plates of the first to sixth steel plates, ventilation holes are provided on one side of the inner wall of the guard plate corresponding to the heat dissipation holes, slots are provided on the left and right sides of the opposite end of the guard plate, dustproof components are installed on the inner walls of the ventilation holes, and limiting components are installed on the left and right sides of the bottom end of the third steel plate.

[0008] Furthermore, the dustproof component includes a rubber sleeve embedded in the inner wall of the ventilation hole, a connecting ring is fixedly connected to the outer side of the rubber sleeve, and a filter is fixedly connected to the outer side of the rubber sleeve.

[0009] Furthermore, the limiting assembly includes a retaining box fixedly connected to the left and right sides of the bottom end of the third steel plate, the inner walls on both sides of the front and rear sides of the bottom end of the retaining box are slidably connected with plugs, the bottom ends of the plugs are fixedly connected with pull blocks, the pull blocks are connected to the inner walls of the retaining box by strong springs, and plug-in assemblies are installed on the upper sides of the front and rear ends of the retaining box.

[0010] Furthermore, the bottom ends of the strong springs are fixedly connected to the top ends of the pull blocks, and the top ends of the strong springs are fixedly connected to the inner wall of the retaining box.

[0011] Furthermore, the plug-in assembly includes a limit plate embedded in the upper inner wall at both ends of the retaining box, a clamping block is fixedly connected to the upper inner wall of the opposite end of the limit plate, and a positioning hole is opened on the inner wall of the opposite end of the limit plate.

[0012] Furthermore, the shape of the top end of the plug matches the shape of the inner wall of the positioning hole.

[0013] Furthermore, the shape of the outer wall of the card block matches the shape of the inner wall of the card slot.

[0014] Furthermore, the inner diameter of the rubber sleeve is the same as the inner diameter of the heat dissipation hole.

[0015] The utility model has the following beneficial effects:

[0016] 1. In the utility model, through the cooperation of the ventilation holes, the rubber sleeve and the filter screen, the protective effect of the guard plate on both sides of the leaf spring is not affected, while the gas flowability of the heat dissipation holes can be further improved, thereby improving the heat dissipation effect on the leaf spring, and the filter screen can produce a dust-proof effect on the through part of the ventilation hole.

[0017] 2. In the utility model, by cooperating with the retaining box, the pulling block, the strong spring, the plug, the limiting plate, the positioning hole, the clamping block and the clamping slot, the operation of installing the guard plate on both sides of the leaf spring is simplified, and the disassembly is convenient, and the leaf spring and the guard plate are easy to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional diagram of an arc-shaped compound rear leaf spring proposed by the utility model;

[0019] Figure 2 A schematic diagram of a guard plate structure of an arc-shaped compound rear leaf spring proposed by the utility model;

[0020] Figure 3 This is a cross-sectional view of a rubber sleeve of an arc-shaped compound rear leaf spring proposed by the utility model;

[0021] Figure 4 A cross-sectional view of an arc-shaped compound rear leaf spring proposed by the utility model;

[0022] Figure 5 A cross-sectional view of a retaining box of an arc-shaped compound rear leaf spring proposed by the utility model;

[0023] Figure 6 This is a schematic diagram of the pull block structure of an arc-shaped compound rear leaf spring proposed by the utility model;

[0024] Figure 7 The utility model is a schematic diagram of a limit plate structure of an arc-shaped compound rear leaf spring.

[0025] Legend:

[0026] 1. First steel plate; 2. Bolts; 3. Nuts; 4. Guard plate; 5. Limit plate; 6. Connecting ring; 7. Filter; 8. Ventilation hole; 9. Slot; 10. Rubber sleeve; 11. Second steel plate; 12. Third steel plate; 13. Fourth steel plate; 14. Fifth steel plate; 15. Sixth steel plate; 16. Heat dissipation hole; 17. Retaining box; 18. Positioning hole; 19. Block; 20. Pull block; 21. Power spring; 22. Plug. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Reference Figure 1-7The utility model provides an embodiment: an arc-shaped compound rear leaf spring, comprising a first steel plate 1, the bottom end of which is fixedly connected with a second steel plate 11, a third steel plate 12, a fourth steel plate 13, a fifth steel plate 14, and a sixth steel plate 15 in sequence, a bolt 2 is installed in the middle of the inner wall of the first steel plate 1 to the sixth steel plate 15, a nut 3 is installed on the upper side of the outer wall of the bolt 2, and a guard plate 4 is installed at both the front and rear ends of the first steel plate 1 to the sixth steel plate 15, and the guard plate 4 can reduce the large-area intrusion of dust and dirt, In order to reduce the degree of rust and aging of the spring steel plate and to achieve the effect of rust and corrosion prevention for the spring steel plate, a plurality of heat dissipation holes 16 are provided between the first steel plate 1 to the sixth steel plate 15. The heat dissipation holes 16 can reduce the heat generated by the friction between the two plates to avoid excessive temperature caused by friction, which affects the strength of the spring steel plate, thereby having a physical heat dissipation effect on the spring steel plate. Ventilation holes 8 are provided on one side of the inner wall of the guard plate 4 corresponding to the heat dissipation holes 16, and card slots 9 are provided on the left and right sides of the opposite end of the guard plate 4.

[0029] A rubber sleeve 10 is embedded in the inner wall of the ventilation hole 8, and a connecting ring 6 is fixedly connected to the outer wall of the rubber sleeve 10 on one side thereof. A filter screen 7 is fixedly connected to the outer side of the rubber sleeve 10, and the inner diameter of the rubber sleeve 10 is the same as the inner diameter of the heat dissipation hole 16. The filter screen 7 in the rubber sleeve 10 embedded in the ventilation hole 8 can produce a dust-proof effect on part of the heat dissipation hole 16 without affecting the heat dissipation and ventilation effect of the heat dissipation hole 16 at the corresponding position, and the notch at the bottom of the connecting ring 6 makes it convenient to pull it out of the ventilation hole 8 before cleaning.

[0030] The left and right sides of the bottom end of the third steel plate 12 are fixedly connected with a retaining box 17, and the inner walls of the front and rear sides of the bottom inner wall of the retaining box 17 are slidably connected with plugs 22, and the bottom ends of the plugs 22 are fixedly connected with pull blocks 20. The pull blocks 20 and the inner walls of the retaining box 17 are connected through strong springs 21, and the bottom ends of the strong springs 21 are fixedly connected to the top ends of the pull blocks 20, and the top ends of the strong springs 21 are fixedly connected to the inner walls of the retaining box 17. The strong springs 21 are connected to the pull blocks 20 so that their outer walls are tightly fitted to the inner walls of the retaining box 17. When the pull block 20 is pulled downward, it is reset and embedded in the retaining box 17 again under the action of the strong springs 21.

[0031] Limiting plates 5 are embedded in the upper inner walls of the front and rear ends of the retaining box 17, and a clamping block 19 is fixedly connected to the upper inner wall of the opposite end of the limiting plate 5. The shape of the outer wall of the clamping block 19 matches the shape of the inner wall of the clamping slot 9. A positioning hole 18 is opened on the inner wall of the opposite end of the limiting plate 5, and the shape of the top of the plug 22 matches the shape of the inner wall of the positioning hole 18. By pulling the pull block 20 downward, the strong spring 21 is stretched, and the plug 22 is disengaged from the positioning hole 18, and then the limiting plate 5 is removed from the retaining box 17, and the upper clamping block 19 is disengaged from the clamping slot 9, so that the guard plate 4 can be removed from both sides of the leaf spring, which is convenient for maintenance of the guard plate 4 and the leaf spring.

[0032] Working principle: First, the heat generated by the friction between the two plates can be reduced through the heat dissipation holes 16, and the friction can prevent the temperature from being too high, which will affect the strength of the spring steel plate, thereby having a physical heat dissipation effect on the spring steel plate. The guard plate 4 can reduce the large-scale intrusion of dust and soil, slow down the degree of rust and aging of the spring steel plate, and achieve rust and corrosion prevention for the spring steel plate. The filter screen 7 in the rubber sleeve 10 embedded in the ventilation hole 8 can not affect the heat dissipation and ventilation effect of the heat dissipation holes 16 at the corresponding position, and can produce a dust-proof effect on part of it. The notch at the bottom of the connecting ring 6 is convenient for pulling it out of the ventilation hole 8 before cleaning. By pulling the pull block 20 downward, the strong spring 21 is stretched, and the plug 22 is disengaged from the positioning hole 18. Then the limit plate 5 is removed from the retaining box 17, and the upper block 19 is disengaged from the card slot 9, so that the guard plate 4 can be removed from both sides of the steel leaf spring, which is convenient for the maintenance of the guard plate 4 and the steel leaf spring.

[0033] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An arc-shaped compound rear leaf spring, comprising a first leaf (1), characterized in that: The bottom end of the first steel plate (1) is fixedly connected with the second steel plate (11), the third steel plate (12), the fourth steel plate (13), the fifth steel plate (14) and the sixth steel plate (15) in sequence; a bolt (2) is installed in the middle of the inner wall of the first steel plate (1) to the sixth steel plate (15); a nut (3) is installed on the upper side of the outer wall of the bolt (2); a guard plate (4) is installed at both the front and rear ends of the first steel plate (1) to the sixth steel plate (15); a plurality of heat dissipation holes (16) are opened between the two steel plates of the first steel plate (1) to the sixth steel plate (15); a ventilation hole (8) is opened on one side of the inner wall of the guard plate (4) corresponding to the heat dissipation hole (16); a card slot (9) is opened on the left and right sides of the opposite end of the guard plate (4); a dustproof component is installed on the inner wall of the ventilation hole (8); and a limit assembly is installed on the left and right sides of the bottom end of the third steel plate (12).

2. The arc-shaped compound rear leaf spring according to claim 1, characterized in that: The dustproof component comprises a rubber sleeve (10) embedded in the inner wall of the ventilation hole (8), a connecting ring (6) is fixedly connected to the outer wall of the rubber sleeve (10) on the outward side, and a filter screen (7) is fixedly connected to the outer side of the rubber sleeve (10).

3. The arc-shaped compound rear leaf spring according to claim 1, characterized in that: The limiting assembly comprises a retaining box (17) fixedly connected to the left and right sides of the bottom end of the third steel plate (12); the inner walls of the front and rear sides of the bottom end of the retaining box (17) are slidably connected with plugs (22); the bottom ends of the plugs (22) are fixedly connected with pull blocks (20); the pull blocks (20) are connected to the inner walls of the retaining box (17) by strong springs (21); and plug-in assemblies are installed on the upper sides of the front and rear ends of the retaining box (17).

4. The arc-shaped compound rear leaf spring according to claim 3, characterized in that: The bottom ends of the powerful springs (21) are fixedly connected to the top ends of the pull blocks (20), and the top ends of the powerful springs (21) are fixedly connected to the inner wall of the retaining box (17).

5. The arc-shaped compound rear leaf spring according to claim 3, characterized in that: The plug-in assembly comprises a limit plate (5) embedded in the upper inner wall at both ends of the retaining box (17), a clamping block (19) is fixedly connected to the upper inner wall of the opposite end of the limit plate (5), and a positioning hole (18) is opened on the inner wall of the opposite end of the limit plate (5).

6. The arc-shaped compound rear leaf spring according to claim 3, characterized in that: The shape of the top end of the plug (22) matches the shape of the inner wall of the positioning hole (18).

7. The arc-shaped compound rear leaf spring according to claim 5, characterized in that: The shape of the outer wall of the clamping block (19) matches the shape of the inner wall of the clamping slot (9).

8. The arc-shaped compound rear leaf spring according to claim 2, characterized in that: The inner diameter of the rubber sleeve (10) is the same as the inner diameter of the heat dissipation hole (16).

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