Composite material leaf spring protection device

Abstract

The present invention discloses a composite leaf spring protection device, comprising an upper protection plate, an elastomer, a lower protection plate and an adjustment washer, wherein the upper protection plate is provided with a first positioning installation hole; the elastomer is integrated with the upper protection plate by bonding, or gluing, or vulcanization; the lower protection plate is provided with an opening groove and a second positioning installation hole, and the second positioning installation hole and the first positioning installation hole are located at the same end of the upper protection plate and the lower protection plate; the adjustment washer is located between the first positioning installation hole and the second positioning installation hole; the upper protection plate, the lower protection plate and the adjustment washer are connected by bolts and nuts. The present invention can effectively prevent the composite leaf spring from being bumped and impacted during use, especially protect the weak edges of the composite leaf spring, and does not affect the observation of the surface of the protected composite leaf spring, thereby effectively reducing the failure risk of the composite leaf spring. The present invention is easy to install and disassemble, and simple to maintain and replace.

Description

Technical Field

[0001] The invention relates to a composite material leaf spring protection device, belonging to the technical field of automobile suspension. Background Art

[0002] Leaf springs are a type of elastic element in automobile suspensions. They are usually made of spring steel. They are widely used in automobile suspension systems due to their high load-bearing capacity, low cost, and mature technology, especially in medium and heavy-duty commercial vehicles. With the promotion and application of new materials and new technologies in the automotive industry, composite leaf springs are gradually emerging in the automotive field. They have the advantages of light weight, high strength, and good fracture safety. Composite leaf springs are mainly composed of matrix materials and fiber reinforcement materials. Two or more materials of different properties are prepared into finished products under specific conditions. Common matrix materials include epoxy resins, and fiber reinforcement materials include carbon fiber, glass fiber, and basalt fiber. Composite leaf springs were originally used in the field of passenger cars. With the advancement of raw material technology and processes, they have been increasingly used in the field of medium and heavy-duty commercial vehicles in recent years, which has also brought new challenges to composite leaf springs. Medium and heavy-duty commercial vehicles are used in harsh environments and inevitably run on uneven roads and flying stones. Although composite leaf springs have many advantages, they are not impact-resistant. Once stones hit the surface, especially the weak edges, it is easy to cause damage to the composite leaf spring, resulting in product failure, safety hazards and economic losses. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a composite leaf spring protection device in view of the defects of the prior art, so as to protect the composite leaf spring from the impact of hard objects, prolong its service life and improve the safety of vehicle driving.

[0004] To solve this technical problem, the present invention provides a composite leaf spring protection device, comprising an upper protective plate, an elastomer, a lower protective plate and an adjusting washer, the upper protective plate being provided with a positioning mounting hole one; the elastomer being bonded, glued or vulcanized to form a whole with the upper protective plate; the lower protective plate being provided with an opening groove and a positioning mounting hole two, the positioning mounting hole two and the positioning mounting hole one being located at the same end of the upper protective plate and the lower protective plate; the adjusting washer being located between the positioning mounting hole one and the positioning mounting hole two; the upper protective plate, the lower protective plate and the adjusting washer being connected by bolts and nuts.

[0005] The upper protective plate is rectangular as a whole, the lower part is concave, and one side of the upper part is provided with a plurality of observation slits.

[0006] The elastic body is made of elastic material and can be deformed.

[0007] The elastic body is connected to the end of the upper protective plate.

[0008] The lower protective plate is rectangular as a whole, and the upper part is concave; the opening groove is arranged at the other end of the second positioning mounting hole.

[0009] The protective device is divided into left and right parts, and the left and right protective devices are respectively arranged at both ends of the composite leaf spring. A lower end cover plate is provided below the end of the composite leaf spring, and an upper end cover plate is provided above the end; the upper protective plate is connected to the upper end cover plate of the composite leaf spring through bolts and nuts; the lower protective plate is connected to the lower end cover plate of the composite leaf spring through bolts and nuts; the elastomer relies on its own deformation to always contact the upper surface of the composite leaf spring.

[0010] Beneficial effects: The present invention can effectively prevent the composite leaf spring from being bumped and impacted during use, especially protecting the weak edges of the composite leaf spring, and does not affect the observation of the surface of the protected composite leaf spring, effectively reducing the failure risk of the composite leaf spring. The present invention is easy to install and disassemble, and simple to maintain and replace. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the present invention;

[0012] Figure 2 It is a structural schematic diagram of the upper protective plate of the present invention;

[0013] Figure 3 It is a schematic diagram of the structure of the elastomer of the present invention;

[0014] Figure 4 It is a schematic diagram of the assembly of the upper protective plate and the elastic body of the present invention;

[0015] Figure 5 It is a structural schematic diagram of the lower protective plate of the present invention;

[0016] Figure 6 This is a schematic diagram of the structure of the composite leaf spring of the present invention;

[0017] Figure 7 It is a schematic diagram of the assembly of the protective device and the composite leaf spring of the present invention.

[0018] In the figure: 1. upper protective plate; 2. elastic body; 3. lower protective plate; 4. adjusting washer; 5. bolt; 6. nut; 7. composite leaf spring; 8. lower end cover plate; 9. upper end cover plate; 11. positioning mounting hole 1; 12. observation gap; 31. opening slot; 32. positioning mounting hole 2. DETAILED DESCRIPTION

[0019] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0020] like Figure 1-Figure 7As shown, the present invention provides a composite leaf spring protection device, including an upper protective plate 1, an elastomer 2, a lower protective plate 3 and an adjusting washer 4, wherein the upper protective plate 1 is provided with a positioning mounting hole 11; the elastomer 2 is integrated with the upper protective plate 1 by bonding, or gluing, or vulcanization; the lower protective plate 3 is provided with an opening groove 31 and a second positioning mounting hole 32, and the second positioning mounting hole 32 and the first positioning mounting hole 11 are located at the same end of the upper protective plate 1 and the lower protective plate 3; the adjusting washer 4 is located between the first positioning mounting hole 11 and the second positioning mounting hole 32; the upper protective plate 1, the lower protective plate 3 and the adjusting washer 4 are connected by bolts 5 and nuts 6; and a composite leaf spring 7 is arranged between the upper protective plate 1 and the lower protective plate 3.

[0021] The upper protective plate 1 is a generally downwardly concave rectangular shape, which can protect the upper surface and two edges of the composite leaf spring 7 from being impacted by hard objects. A plurality of observation slits 12 are provided on one side of the upper portion thereof to facilitate users and maintenance personnel to check the surface condition of the composite leaf spring 7.

[0022] The elastomer 2 is made of elastic materials such as rubber, polyurethane or sponge, and can be deformed under the action of external force. After the external force is released, it can restore its original shape by relying on its own elasticity, thereby preventing the upper protective plate 1 from scratching the composite leaf spring 7.

[0023] The elastic body 2 is fixed in the concave groove at the end of the upper protective plate 1 to prevent foreign matter such as dust and stones from entering and accumulating from the end.

[0024] The lower protective plate 3 is an upwardly concave rectangular shape as a whole, which can protect the two edges of the lower surface of the composite leaf spring 7 from being impacted by hard objects; the opening groove 31 is arranged at the other end of the second positioning and mounting hole 32 to prevent the accumulation of foreign matter during use.

[0025] The protective device is divided into left and right parts, and the left and right protective devices are respectively arranged at the two ends of the composite leaf spring 7. In order to avoid end wear, an end lower cover plate 8 is provided below the end of the composite leaf spring 7, and an end upper cover plate 9 is provided above the end. The end lower cover plate 8 and the end upper cover plate 9 are usually made of metal wear-resistant material; the upper protective plate 1 is connected to the end upper cover plate 9 of the composite leaf spring 7 by bolts 5 and nuts 6; the lower protective plate 3 is connected to the end lower cover plate 8 of the composite leaf spring 7 by bolts 5 and nuts 6; the elastomer 2 relies on its own deformation to always contact with the upper surface of the composite leaf spring 7 to prevent foreign matter from entering from the end.

[0026] The present invention mainly protects the vulnerable parts of the composite leaf spring, such as the upper and lower surfaces of the composite leaf spring that are easily worn and the four edges that are easily bumped. During assembly, first align and fasten the end lower cover plate 8 and the end upper cover plate 9 with the end holes of the composite leaf spring 7; then align the respective holes of the upper protection plate 1 and the end upper cover plate 9, and align the respective holes of the lower protection plate 3 and the end lower cover plate 8; then insert the fastening bolts 5 through the aligned holes, tighten the nuts 6, and assemble the protective device on the other side of the composite leaf spring 7 in the same way.

[0027] The upper protective plate of the present invention can protect the upper surface and two edges of the upper surface of the composite leaf spring from being impacted by hard objects, and the lower protective plate can protect the two edges of the lower surface of the composite leaf spring from being impacted by hard objects; a plurality of observation slits are provided on the upper protective plate, so that it will not block the field of vision while protecting the composite leaf spring, and it is convenient for users and maintenance personnel to check the product surface; an elastic body is provided at the end of the upper protective plate, which can prevent foreign matter from entering and accumulating between the composite leaf spring and the upper protective plate, and avoid the risk of friction between foreign matter and the composite leaf spring. During the operation of the vehicle, the leaf spring deforms within the design range, and the elastomer also has the ability to deform, which can ensure that it fits with the upper surface of the composite leaf spring; the lower protective plate is provided with an open groove, which can prevent foreign matter from accumulating during use; the adjusting washer can easily adjust the gap between the composite leaf spring protective device and the composite leaf spring, so that the composite leaf spring protective device is easier to use; the present invention is assembled and connected with the composite leaf spring by bolts and nuts, and is easy to disassemble and replace.

[0028] The above embodiments of the present invention are merely illustrative and not exclusive, and all modifications within the scope of the present invention or equivalent to the scope of the present invention are encompassed by the present invention.

Claims

1. A composite leaf spring protection device, characterized in that: The invention comprises an upper protective plate (1), an elastic body (2), a lower protective plate (3) and an adjusting washer (4), wherein the upper protective plate (1) is provided with a first positioning mounting hole (11); the elastic body (2) is integrated with the upper protective plate (1) by bonding, or gluing, or vulcanization; the lower protective plate (3) is provided with an opening groove (31) and a second positioning mounting hole (32), and the second positioning mounting hole (32) and the first positioning mounting hole (11) are located at the same end of the upper protective plate (1) and the lower protective plate (3); the adjusting washer (4) is located between the first positioning mounting hole (11) and the second positioning mounting hole (32); the upper protective plate (1), the lower protective plate (3) and the adjusting washer (4) are connected by bolts (5) and nuts (6); The upper protective plate (1) is rectangular in shape as a whole, and the lower part is concave; The lower protective plate (3) is rectangular in shape as a whole, and the upper portion is concave; The protective device is divided into left and right parts, and the left and right protective devices are respectively arranged at the two ends of the composite leaf spring (7). An end lower cover plate (8) is provided below the end of the composite leaf spring (7), and an end upper cover plate (9) is provided above the end. The upper protective plate (1) is connected to the end upper cover plate (9) of the composite leaf spring (7) by bolts (5) and nuts (6). The lower protective plate (3) is connected to the end lower cover plate (8) of the composite leaf spring (7) by bolts (5) and nuts (6). The elastic body (2) is always in contact with the upper surface of the composite leaf spring (7) by virtue of its own deformation.

2. The composite leaf spring protection device according to claim 1, characterized in that: A plurality of observation slits (12) are provided on one side of the upper portion of the upper protection plate (1).

3. The composite leaf spring protection device according to claim 1, characterized in that: The elastic body (2) is made of elastic material and is capable of deformation.

4. The composite leaf spring protection device according to claim 1, characterized in that: The elastic body (2) is connected to the end of the upper protective plate (1).

5. The composite leaf spring protection device according to any one of claims 1 to 4, characterized in that: The opening groove (31) is arranged at the other end of the second positioning installation hole (32).

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