Basalt fiber plate spring assembly

Abstract

The utility model provides a basalt fiber plate spring assembly, and belongs to the technical field of automobile suspension systems. The problems that an existing plate spring is short in service life and low in fatigue strength are solved. The basalt fiber plate spring assembly comprises a plate spring body made of basalt fibers, a positioning part arranged in the middle of the plate spring body and connecting structures arranged at the two ends of the plate spring body, each connecting structure comprises a spring eye with a connecting part and a first hoop, the connecting parts are attached to the plate spring body, and the first hoops tightly hold the connecting parts and the plate spring body. And the connecting part and the plate spring main body are tightly held through the first hoop, so that the connecting strength is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of automotive suspension systems and relates to a basalt fiber leaf spring assembly. Background Technology

[0002] In automotive suspension systems, leaf springs are a common type of elastic element, and their performance directly affects the ride comfort, handling stability, and load-bearing capacity of the vehicle. A Chinese patent discloses a leaf spring assembly [authorization announcement number CN210265626U], which includes a straight section and two symmetrically arranged arc-shaped sections connected to both ends of the straight section. The ends of the two arc-shaped sections are provided with connecting parts for connection to the vehicle frame, and the straight section is provided with positioning parts for positioning connection to the bridge frame. The connecting parts are metal lugs, which are fixedly connected to the ends of the arc-shaped sections by bolts.

[0003] Because it is necessary to set through holes in the curved part for bolts to pass through, the structural strength and fatigue strength of the curved part are reduced, resulting in a shorter service life; the bonding force between the positioning part and the straight part is mainly adhesive force, which is weak and easy to fall off. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a basalt fiber leaf spring assembly with high fatigue strength.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] The basalt fiber leaf spring assembly includes a leaf spring body made of basalt fiber, a positioning part located in the middle of the leaf spring body, and a connecting structure located at both ends of the leaf spring body. The connecting structure includes a lug with a connecting part and a first clamp. The connecting part is attached to the leaf spring body, and the first clamp holds the connecting part tightly to the leaf spring body.

[0007] The coiled end is located at the end of the connecting part away from the middle of the leaf spring body and is connected to the frame. The first clamp tightly holds the connecting part to the leaf spring body, which improves the connection strength.

[0008] In the above-mentioned basalt fiber leaf spring assembly, the lower / upper surface of the connecting part has a first contact surface that fits against the upper / lower surface of the leaf spring body, and an adhesive is provided between the first contact surface and the contact surface of the leaf spring body.

[0009] First, the connecting part is glued to both ends of the leaf spring body. Then, the connecting part is fixed to the leaf spring body by the first clamp. The adhesive force is the secondary force, and the clamping force is the primary force, making the connection convenient and reliable.

[0010] In the aforementioned basalt fiber leaf spring assembly, the inner surface of the first clamp is provided with adhesive. The first clamp is connected to the connection between the connecting part and the leaf spring body by adhesive bonding, and a clamping structure for tightening the first clamp can also be provided.

[0011] In the above-mentioned basalt fiber leaf spring assembly, the distance from the center of the coil lug to the centerline of the leaf spring body is less than the distance from the end of the leaf spring body to the centerline of the leaf spring body.

[0012] The center of the coil is located above the leaf spring body, which can effectively reduce the additional bending moment between the force transmission center and the stress point at the root of the leaf spring body, thereby reducing the shear force and bending stress at the root and optimizing the force distribution.

[0013] In the aforementioned basalt fiber leaf spring assembly, a second clamp is provided in the middle of the leaf spring body to hold the middle of the leaf spring body, and the positioning part is provided on the second clamp. The second clamp is held in the middle of the leaf spring body, and the positioning part is provided on the second clamp. Compared with the prior art that only uses adhesive bonding, its connection is more reliable and the structural strength is higher.

[0014] In the aforementioned basalt fiber leaf spring assembly, there are two positioning parts, located on the upper and lower sides of the second clamp, respectively, with the upper positioning part directly above the lower positioning part. These two positioning parts enhance the positioning connection with the cable tray.

[0015] In the aforementioned basalt fiber leaf spring assembly, the positioning part is formed by stamping a second clamp. The second clamp is initially a metal plate. Before being bent into a clamp, the positioning part is punched out of the metal plate by a punch press, and then the metal plate is bent into the second clamp.

[0016] In the above-mentioned basalt fiber leaf spring assembly, the inner upper surface of the second clamp is in contact with the upper surface of the leaf spring body, and the inner lower surface of the second clamp is in contact with the lower surface of the leaf spring body.

[0017] Because the upper and lower surfaces of the leaf spring body are curved, the inner upper and lower surfaces of the second clamp are also curved to achieve a close fit. This design increases the contact area between the second clamp and the leaf spring body, thus improving stability.

[0018] In the aforementioned basalt fiber leaf spring assembly, the inner surface of the second clamp is provided with adhesive. The second clamp is connected to the leaf spring body by adhesive bonding. In addition, a clamping structure for tightening the second clamp can also be provided.

[0019] In the aforementioned basalt fiber leaf spring assembly, the coil lug, the first clamp, and the second clamp are metal parts.

[0020] Compared with existing technologies, this basalt fiber leaf spring assembly has the following advantages: the first clamp tightly holds the connecting part to the leaf spring body, improving the connection strength without compromising the structural strength of the leaf spring body; the center of the coil is located above the leaf spring body, which can effectively reduce the additional bending moment between the force transmission center and the stress point at the root of the leaf spring body, thereby reducing the shear force and bending stress at the root and optimizing the stress distribution; the positioning part is set on the second clamp that is tightly held to the leaf spring body, resulting in higher fatigue strength. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the basalt fiber leaf spring assembly provided in Example 1.

[0022] Figure 2 This is a schematic diagram of the basalt fiber leaf spring assembly provided in Example 2.

[0023] Figure 3 This is a cross-sectional view of the second clamp provided in Embodiment 1.

[0024] Figure 4 This is a cross-sectional view of the second clamp provided in Embodiment 3.

[0025] Figure 5 This is a cross-sectional view of the second clamp provided in Embodiment 4.

[0026] Figure 6 yes Figure 1 Enlarged schematic diagram of the first clamp and the rolled ear.

[0027] In the diagram, 1. Leaf spring body; 2. Positioning part; 3. Coil lug; 31. Connecting part; 4. First clamp; 41. Hook; 5. Second clamp; 51. First lug; 52. Second lug; 53. Upper clamping part; 54. Lower clamping part; 55. Upper lug; 56. Lower lug; 6. Third clamp; 7. Locking nut; Detailed Implementation

[0028] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0029] Example 1

[0030] like Figure 1 The basalt fiber leaf spring assembly shown includes a leaf spring body 1 made of basalt fiber, a positioning part 2 located in the middle of the leaf spring body 1, and a connecting structure located at both ends of the leaf spring body 1. The leaf spring body 1 is curved in an arc shape.

[0031] like Figure 1As shown, the connecting structure includes a coiled ear 3 with a connecting part 31 and a first clamp 4. The coiled ear 3 is connected to the frame. The curvature of the connecting part 31 is the same as the curvature of the leaf spring body 1. The connecting part 31 is attached to the upper surface of the leaf spring body 1. The width of the connecting part 31 is equal to the width of the leaf spring body 1. The first clamp 4 holds the connecting part 31 tightly to the leaf spring body 1.

[0032] To ensure better fit between the connecting part 31 and the leaf spring body 1, the lower surface of the connecting part 31 serves as a first contact surface that contacts the upper surface of the leaf spring body 1. An adhesive is applied between the first contact surface and the contact surface of the leaf spring body 1. The connecting part 31 is first bonded to both ends of the leaf spring body 1, and then the first clamp 4 secures the connecting part 31 to the leaf spring body 1. The adhesive force acts as a secondary force, while the clamping force acts as the primary force, resulting in a convenient and reliable connection.

[0033] The first clamp 4 is a ring with a notch. After the first clamp 4 is fitted onto the connection between the connecting part 31 and the leaf spring body 1, the first clamp 4 is tightened with a tool. In order to prevent the first clamp 4 from falling off, adhesive is provided on the inner surface of the first clamp 4, that is, the first clamp 4 is connected to the connection between the connecting part 31 and the leaf spring body 1 by adhesive.

[0034] In this embodiment, before applying glue, to prevent the first clamp 4 from moving along the length of the leaf spring body 1, as follows: Figure 1 and Figure 6 As shown, a hook 41 is provided on the first clamp 4. The hook 41 is integrated with the first clamp 4. The hook is hung on the end of the leaf spring body 1. Due to the limitation of the end of the leaf spring body 1 and the hook 41, the first clamp will not move downward along the length direction of the leaf spring body 1.

[0035] Furthermore, the hook 41 is positioned opposite to the connecting part 31: when the connecting part 31 is positioned on the upper side of the leaf spring body 1, the hook 41 is positioned on the lower side of the leaf spring body 1; when the connecting part 31 is positioned on the lower side of the leaf spring body 1, the hook 41 is positioned on the upper side of the leaf spring body 1.

[0036] In other embodiments, the connecting part 31 is located on the lower side of the leaf spring body 1, and the upper surface of the connecting part 31 is a first contact surface that fits against the lower surface of the leaf spring body 1. An adhesive is provided between the first contact surface and the contact surface of the leaf spring body 1.

[0037] In both installation methods of the connecting part 31 described above, the center of the coil lug 3 is always located above the coil spring body, and the distance from the center of the coil lug 3 to the centerline of the leaf spring body 1 is less than the distance from the end of the leaf spring body 1 to the centerline of the leaf spring body 1. This can effectively reduce the additional bending moment between the force transmission center and the stress point at the root of the leaf spring body 1, thereby reducing the shear force and bending stress at the root and optimizing the force distribution.

[0038] like Figure 1 As shown, a second clamp 5 is provided in the middle of the leaf spring body 1 to hold the middle of the leaf spring body 1. The second clamp 5 is held in the middle of the leaf spring body 1. The positioning part 2 is provided on the second clamp 5. Compared with the existing technology that only uses adhesive bonding, its connection is more reliable and the structural strength is higher. The positioning part 2 is provided on the second clamp 5.

[0039] In this embodiment, as Figure 1 As shown, there are two positioning parts 2, which are located on the upper and lower sides of the second clamp 5 respectively. The positioning part 2 located on the upper side is directly above the positioning part 2 located on the lower side. The positioning connection with the cable tray can be enhanced by the two positioning parts 2.

[0040] The positioning part 2 is a column integrally formed on the second clamp 5, or a column welded to the second clamp 5. The cross-sectional shape of the column can be a cylindrical, rectangular, wedge-shaped protrusion or a positioning pin, bolt or other component. Any structural form that can achieve the positioning of the leaf spring body 1 is acceptable.

[0041] In other embodiments, the positioning part 2 may be provided only once, or it may be provided on the upper part of the second clamp 5, or on the lower part of the second clamp 5.

[0042] The inner upper surface of the second clamp 5 is in contact with the upper surface of the leaf spring body 1, and the inner lower surface of the second clamp 5 is in contact with the lower surface of the leaf spring body 1. Since the upper and lower surfaces of the leaf spring body 1 are curved, the inner upper and lower surfaces of the second clamp 5 are also curved to achieve this contact. This design increases the contact area between the second clamp 5 and the leaf spring body 1, thereby improving stability.

[0043] The inner surface of the second clamp 5 is provided with adhesive, and the second clamp 5 is connected to the leaf spring body 1 by adhesive bonding.

[0044] The adhesive bonding in this embodiment is a process that uses the mechanical bonding force, physical adsorption force, and chemical bonding force generated by the adhesive on the joint surface to join two adhesive components together. Adhesive bonding is applicable not only to the same type of material but also to dissimilar materials.

[0045] The adhesive bonding process is simple, requiring no complex equipment. The bonding operation does not need to be performed under high temperature and pressure, thus the bonded parts are less prone to deformation, and the stress distribution at the joint is uniform. Under normal circumstances, the bonded joint has good sealing, electrical insulation, and corrosion resistance. In specific connection, simply place a certain amount of adhesive between the contact surfaces of the connecting part 31 and the leaf spring body 1, the contact surfaces of the first clamp 4 and the connecting part 31 and the leaf spring body 1, and the contact surfaces of the second clamp 5 and the leaf spring body 1 to connect the two parts; it is simple and easy to implement.

[0046] In this embodiment, in order to prevent the leaf spring body 1 from delaminating, a third clamp 6 is also attached to the leaf spring body 1. The third clamp 6 is located between the first clamp 4 and the second clamp 5.

[0047] In this embodiment, except for the leaf spring body 1 which is made of basalt fiber, other components such as the first clamp 4, the second clamp 5, the third clamp 6, and the coil lug 3 are all made of metal.

[0048] In this embodiment, as Figure 3 As shown, the second clamp 5 is a ring with a notch. During installation, the positioning part 2 is first fixed to the upper and lower parts of the second clamp 5, then the second clamp 5 is fitted onto the middle part of the leaf spring body 1, and then adhesive is injected into the contact surface between the second clamp 5 and the leaf spring body 1 to bond the second clamp 5 to the leaf spring body 1.

[0049] Example 2

[0050] The structural principle of this embodiment is basically the same as that of Embodiment 1, except that, as Figure 2 As shown, the positioning part 2 is stamped from the second clamp 5.

[0051] The second clamp 5 is initially a metal plate. Before being bent into a clamp, a positioning part 2 is punched out on the metal plate by a punch press, and then the metal plate is bent into the second clamp 5.

[0052] Example 3

[0053] The structural principle of this embodiment is basically the same as that of Embodiment 1, except that a clamping structure is added based on Embodiment 1. For example... Figure 4 As shown, the second clamp 5 is a ring with a notch. During installation, the positioning part 2 is first fixed to the upper and lower parts of the second clamp 5, then the second clamp 5 is fitted onto the middle part of the leaf spring body 1, and then adhesive is injected into the contact surface between the second clamp 5 and the leaf spring body 1 to bond the second clamp 5 to the leaf spring body 1. Finally, the second clamp 5 is tightened by the clamping structure.

[0054] In this embodiment, the clamping structure includes a first lug 51 and a second lug 52 located at the opening of the second clamp 5. The first lug 51 and the second lug 52 are arranged opposite to each other, with the first lug 51 located at the upper part of the opening and the second lug 52 located at the lower part of the opening. A locking nut 7 and a bolt are inserted between the first lug 51 and the second lug 52 to bring them together. By rotating the locking nut 7, the first lug 51 and the second lug 52 can be brought together, thereby achieving the purpose of clamping the second clamp 5.

[0055] The clamping structure used to clamp the first clamp 4 can be the clamping structure of this embodiment.

[0056] Example 4

[0057] The structural principle of this embodiment is basically the same as that of Embodiment 1, except that a clamping structure is added based on Embodiment 1. For example... Figure 5 As shown, the second clamp 5 includes an upper clamping part 53 and a lower clamping part 54. The upper clamping part 53 and the lower clamping part 54 are symmetrically arranged. Upper lugs 55 are provided on both sides of the upper clamping part 53, and lower lugs 56 are provided on both sides of the lower clamping part 54. The upper lugs 55 and the lower lugs 56 on the same side are arranged opposite to each other. A locking nut 7 and a bolt are provided between the upper lugs 55 and the lower lugs 56 to bring them together.

[0058] The clamping structure used to clamp the first clamp 4 can be the clamping structure of this embodiment.

[0059] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A basalt fiber leaf spring assembly, characterized by, The connecting structure comprises a loop ear (3) with a connecting part (31) and a first clamp (4), the connecting part (31) is attached to the plate spring body (1), and the first clamp (4) tightly holds the connecting part (31) and the plate spring body (1).

2. The basalt fiber leaf spring assembly of claim 1, wherein, The lower surface / upper surface of the connecting part (31) has a first attachment surface attached to the upper surface / lower surface of the plate spring body (1), and an adhesive is arranged between the first attachment surface and the contact surface of the plate spring body (1).

3. The basalt fiber leaf spring assembly of claim 2, wherein, The inner surface of the first clamp (4) is provided with an adhesive.

4. The basalt fiber leaf spring assembly of claim 1, wherein, The distance from the center of the loop ear (3) to the centerline of the plate spring body (1) is less than the distance from the end of the plate spring body (1) to the centerline of the plate spring body (1).

5. The basalt fiber leaf spring assembly of claim 1, wherein, The middle part of the plate spring body (1) is provided with a second clamp (5) for holding the middle part of the plate spring body (1), and the positioning part (2) is arranged on the second clamp (5).

6. The basalt fiber leaf spring assembly of claim 5, wherein, The positioning part (2) is two and is located on the upper side and the lower side of the second clamp (5), respectively, and the positioning part (2) on the upper side is directly above the positioning part (2) on the lower side.

7. The basalt fiber leaf spring assembly of claim 5 or 6, wherein, The positioning part (2) is punched from the second clamp (5).

8. The basalt fiber leaf spring assembly of claim 5 or 6, wherein, The inner upper surface of the second clamp (5) is attached to the upper surface of the plate spring body (1), and the inner lower surface of the second clamp (5) is attached to the lower surface of the plate spring body (1).

9. The basalt fiber leaf spring assembly of claim 8, wherein, The inner surface of the second clamp (5) is provided with an adhesive.

10. The basalt fiber leaf spring assembly of claim 5, wherein, The loop ear (3), the first clamp (4) and the second clamp (5) are metal parts.

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