Center positioning hole of automobile steel plate spring

Abstract

The utility model discloses a central positioning hole of an automobile steel plate spring, which comprises a reed, a clamping hoop is mounted on the outer side of the reed, the top end of the clamping hoop is rotatably connected with a roller, a positioning hole is formed in the center of the reed, and trumpet-shaped external expansion grooves which are gradually expanded outwards from the edge of an inner hole are formed in two ports of the positioning hole; the steel plate spring has the advantages that the trend of complex loads generated in the running process of a vehicle can be dispersed through the external expansion grooves, tearing and stretching of stress are relieved, the protruding strips on the lower side reed are connected with the butt joint grooves in the surface of the upper side reed in an aligned and clamped mode, a center positioning hole of the steel plate spring can be rapidly guided to be accurately aligned, and the service life of the steel plate spring is prolonged. The flow guide grooves are communicated with the through holes, so that steel plate maintenance liquid can be conveniently added to the contact surfaces of the reeds, multiple groups of reeds can be conveniently maintained at the same time, the frequency of replacing steel plate springs due to abrasion of steel plates is reduced, and the vehicle maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts, and in particular to a center positioning hole for automotive leaf springs. Background Technology

[0002] As a crucial component of the vehicle suspension system, automotive leaf springs play a key role in the vehicle's load-bearing capacity, driving stability, and comfort. The center locating hole of the leaf spring is of paramount importance in the entire system, undertaking the tasks of positioning the leaf spring, transmitting loads, and ensuring the coordinated operation of each leaf spring. Traditional circular center locating holes are prone to stress concentration at the hole edges when subjected to complex and variable loads, leading to premature fatigue cracks in the surrounding area, affecting the service life and safety of the leaf spring. Furthermore, during assembly, ordinary center locating holes require extremely high assembly precision, demanding significant time and effort from assembly workers for accurate alignment, resulting in low assembly efficiency. Moreover, any deviation in assembly can severely impact the performance of the leaf spring and even the entire suspension system. Utility Model Content

[0003] The purpose of this utility model is to provide a center positioning hole for automotive leaf springs in order to solve at least one of the above-mentioned technical problems.

[0004] This utility model achieves the above-mentioned objective through the following technical solution: a center positioning hole for an automotive leaf spring, comprising a leaf spring, a clamp installed on the outer side of the leaf spring, a roller rotatably connected to the top of the clamp, a positioning hole opened at the center of the leaf spring, and flared grooves that gradually expand outward from the inner edge of the positioning hole at both ends of the positioning hole, the upper side of the leaf spring being symmetrically fixedly connected with a protruding strip in the shape of a triangular prism, and the bottom surface of the leaf spring having a mating groove that matches the protruding strip.

[0005] As a further improvement of this utility model: a central bolt is provided inside the positioning hole, and a number of buffer pads are sleeved on the outside of the central bolt, and the buffer pads are sequentially installed between adjacent springs.

[0006] As a further embodiment of this utility model: the surface of the spring is symmetrically provided with through holes in a T-shape, the bottom surface of the spring is provided with a guide groove, and the through holes on the spring are connected to the guide groove.

[0007] As a further improvement of this utility model: a threaded groove is provided inside the through hole located on the top layer, and the spring is screwed to a cover through this threaded groove.

[0008] As a further improvement of this utility model: an elliptical insertion groove is provided on the upper surface of the spring sheet near the through hole, and a sponge block is provided inside the insertion groove.

[0009] As a further improvement of this utility model: a cylindrical protrusion is fixedly connected to the bottom surface of the reed near the sponge block.

[0010] The beneficial effects of this utility model are:

[0011] 1. This utility model is equipped with an outer expansion groove, which can disperse the tendency of complex loads generated during vehicle operation, reduce stress tearing and stretching. By aligning and engaging the protrusion strip on the lower spring with the mating groove on the surface of the upper spring, the center positioning hole of the leaf spring can be quickly guided to be accurately aligned, improving assembly efficiency and reducing assembly difficulty. The cooperation between the protrusion strip and the mating groove can also further limit the displacement of the leaf spring during vehicle operation, enhancing the stability of the system.

[0012] 2. The guide groove connects to the through hole, making it easy to add the steel plate curing fluid to the contact surface of the spring. This allows for simultaneous curing of multiple sets of springs, reducing the frequency of replacing the leaf springs due to steel plate wear. At the same time, the sponge block can store the curing fluid. When multiple sets of springs deform, the protrusion will squeeze the sponge block to compress it, causing the curing fluid inside the sponge block to be squeezed out and automatically added to the contact surface of the spring, reducing the frequency of maintenance and lowering the maintenance cost of the spring. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a cross-sectional view of the reed in this utility model;

[0015] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle;

[0016] Figure 4 This utility model Figure 2 Enlarged view of point B in the middle;

[0017] Figure 5 This is a schematic diagram of the flow guide groove and positioning hole in this utility model.

[0018] In the diagram: 1. Spring; 2. Center bolt; 3. Clamp; 4. Roller; 5. Cover; 6. Guide channel; 7. Through hole; 8. Sponge block; 9. Protrusion; 10. Outer expansion groove; 11. Buffer pad; 12. Positioning hole; 13. Raised strip. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example 1

[0021] like Figures 1 to 5 As shown, a center positioning hole for an automotive leaf spring includes a leaf spring 1, a clamp 3 installed on the outer side of the leaf spring 1, a roller 4 rotatably connected to the top of the clamp 3, a positioning hole 12 is provided at the center of the leaf spring 1, and two flared grooves 10 that gradually expand outward from the inner edge of the positioning hole 12 are provided at both ends of the positioning hole 12, and a triangular prism-shaped protrusion 13 is symmetrically fixedly connected to the upper side of the leaf spring 1, and a mating groove matching the protrusion 13 is provided on the bottom surface of the leaf spring 1.

[0022] The outward expansion groove 10, which gradually expands outward from the edge of the inner hole in a trumpet shape, can disperse the tendency of complex loads generated during vehicle operation, and reduce stress tearing and stretching. During assembly, the protrusion 13 on the lower spring 1 is aligned and engaged with the mating groove on the surface of the upper spring 1, which can quickly guide the center positioning hole of the leaf spring to be accurately aligned, improve assembly efficiency, and reduce assembly difficulty. The cooperation between the protrusion 13 and the mating groove can also further limit the displacement of the leaf spring during vehicle operation and enhance the stability of the system.

[0023] A central bolt 2 is provided inside the positioning hole 12, and several sets of buffer pads 11 are sleeved on the outside of the central bolt 2. The buffer pads 11 are installed between adjacent springs 1 in sequence, and the buffer pads 11 are wear-resistant elastic rubber pads.

[0024] Example 2

[0025] In addition to all the technical features included in Embodiment 1, this embodiment also includes:

[0026] The surface of the spring 1 is symmetrically provided with T-shaped through holes 7, and the bottom surface of the spring 1 is provided with a guide groove 6, and the through holes 7 on the spring 1 are connected to the guide groove 6; the inside of the through hole 7 located at the top layer is provided with a threaded groove, and the spring 1 is screwed with a cap 5 through this threaded groove; the upper surface of the spring 1 is provided with an elliptical insertion groove on the side near the through hole 7, and a sponge block 8 is provided inside the insertion groove; a cylindrical protrusion 9 is fixedly connected to the bottom surface of the spring 1 near the sponge block 8.

[0027] By unscrewing the cap 5, the cap 5 can be removed, allowing maintenance personnel to easily introduce the steel plate maintenance fluid from the top through hole 7 into the guide channel 6. Then, the guide channel 6 connects with the through hole 7, allowing the fluid to flow between each spring 1. This facilitates maintenance of the contact surfaces of multiple springs 1, reducing the frequency of replacing the leaf springs due to steel plate wear and lowering vehicle maintenance costs. At the same time, the sponge block 8 can store the maintenance fluid. When multiple sets of springs 1 deform, the protrusion 9 will squeeze the sponge block 8 to compress it, causing the maintenance fluid inside the sponge block 8 to be squeezed out and automatically added to the contact surfaces of the springs 1, reducing maintenance frequency and lowering the maintenance costs of the springs 1.

[0028] Working principle: The outward expansion groove 10 disperses the complex loads generated during vehicle operation, mitigating stress tearing and stretching. The protrusion 13 on the lower leaf spring 1 aligns and engages with the mating groove on the surface of the upper leaf spring 1, quickly guiding the center positioning hole of the leaf spring to precise alignment, improving assembly efficiency and reducing assembly difficulty. The cooperation between the protrusion 13 and the mating groove further restricts the displacement of the leaf spring during vehicle operation, enhancing system stability. The cap 5 can be removed by unscrewing it, facilitating maintenance personnel to remove the leaf spring curing fluid. The top through hole 7 leads into the guide groove 6, and then the guide groove 6 connects with the through hole 7, so that it is guided to each spring 1. This facilitates the maintenance of the contact surfaces of multiple springs 1, reduces the frequency of replacing the leaf springs due to steel plate wear, and lowers vehicle maintenance costs. At the same time, the sponge block 8 can store the maintenance fluid. When multiple sets of springs 1 deform, the protrusion 9 will squeeze the sponge block 8 to compress it, causing the maintenance fluid inside the sponge block 8 to be squeezed out and automatically added to the contact surfaces of the springs 1, reducing the frequency of maintenance and lowering the maintenance costs of the springs 1.

[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0030] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A centering hole of an automobile steel plate spring comprising a leaf (1), characterized in that: The outer side of the reed (1) is provided with a clamp (3), the top end of the clamp (3) is rotationally connected with a roller (4), the center of the reed (1) is provided with a positioning hole (12), the two ports of the positioning hole (12) are provided with gradually expanding trumpet-shaped expansion grooves (10) from the inner hole edge, the upper side of the reed (1) is fixedly connected with a protruding strip (13) in a triangular prism structure, and the bottom surface of the reed (1) is provided with a butt joint groove matched with the protruding strip (13).

2. The centering hole of an automotive steel plate spring according to claim 1, characterized in that: The inside of the positioning hole (12) is provided with a center bolt (2), the outside of the center bolt (2) is sleeved with a plurality of groups of buffer washers (11), and the buffer washers (11) are sequentially installed between adjacent reeds (1).

3. The center locating hole of an automotive steel plate spring according to claim 1, characterized by: The surface of the reed (1) is symmetrically provided with a through hole (7) in a T-shaped structure, the bottom surface of the reed (1) is provided with a flow guide groove (6), and the through hole (7) on the reed (1) is communicated with the flow guide groove (6).

4. The centering hole of an automotive steel plate spring according to claim 3, characterized in that: The inside of the through hole (7) on the top layer is provided with a threaded groove, and the reed (1) is screwed with a cover (5) through the threaded groove.

5. The centering hole of an automotive steel plate spring according to claim 4, characterized in that: The upper surface of the reed (1) is provided with an oval insertion groove on one side close to the through hole (7), and the inside of the insertion groove is provided with a sponge block (8).

6. The centering hole of an automotive steel plate spring according to claim 5, characterized in that: The bottom surface of the reed (1) is fixedly connected with a protruding block (9) in a cylindrical structure on one side close to the sponge block (8).

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