A steering knuckle shaft for a vehicle steering axle which reduces wear

Abstract

This utility model relates to the technical field of automotive parts, and in particular to a steering axle kingpin shaft that reduces wear. It includes a kingpin shaft body with an annular groove on its outer ring surface. An oil reservoir is connected to the annular groove via a radial hole, allowing grease in the reservoir to flow smoothly into the groove under pressure. When the reservoir is full of grease, the threaded cap is tightened onto the threaded ring, and the compression spring is in its shortest state. The elasticity of the compression spring continuously pushes the piston to move, injecting grease into the annular groove through the radial hole. When it is necessary to disassemble the connecting seat and piston, the pull ring is pulled outward. The pull ring causes the telescopic rod to extend outward while simultaneously stretching the return spring. The pull ring causes the positioning rod to move outward, causing it to exit the positioning hole on the positioning post. At this point, the positioning post is no longer fixed by the positioning rod and can be pulled out of the positioning groove, achieving separation of the connecting seat and piston. This facilitates replacement when the piston is damaged, improving practicality.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to a steering axle kingpin shaft that can reduce wear. Background Technology

[0002] The kingpin of a car steering axle is the core geometric axis of the steering system. Essentially, it is the axis of rotation connecting the wheels in the steering knuckle. In vehicle engineering, it is a key component of steering geometry parameters. When the kingpin is used on a car steering axle, it is fitted with a bushing. To prevent or reduce wear between the two, grease needs to be filled between them.

[0003] Chinese patent website discloses a wear-reducing automotive steering axle master pin shaft, publication number CN207535980U. The master pin shaft has threaded holes on both ends, and a radial hole penetrating the master pin shaft at each end. The radial hole intersects and communicates with the threaded hole. An elastic piston is installed inside the threaded hole, and a bolt is screwed to the end of the threaded hole. The end of the bolt acts on one end of the elastic piston. The threaded hole serves as a grease filling port, and together with the bolt and elastic piston, it forms an automatic grease release device. This ensures that the grease flows continuously and evenly into the radial hole, and then from the radial hole into the gap between the shaft and the bushing, providing lubrication. The grease filling is uniform and sufficient, improving the lubrication effect and maintaining continuous and uniform lubrication.

[0004] The existing technology still has the following problems: adding grease to the inside of the main pin shaft is cumbersome and inconvenient, and the amount of grease remaining inside cannot be visually observed after long-term use. Therefore, it is necessary to provide a main pin shaft for automotive steering axles that can reduce wear. Utility Model Content

[0005] The purpose of this invention is to provide a steering axle kingpin that can reduce wear, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a steering axle kingpin that reduces wear, comprising a kingpin body, an annular groove formed on the outer ring surface of the kingpin body, an oil reservoir formed on the top of the kingpin body, radial holes symmetrically formed at both ends of the inner sidewall of the oil reservoir, a threaded ring installed on the top of the kingpin body and outside the oil reservoir, a piston installed inside the oil reservoir, a connecting seat provided on the top of the piston, a piston rod installed on the top of the connecting seat, a limiting seat installed on the top of the piston rod, a compression spring installed on the outer ring surface of the piston rod and above the connecting seat, and a threaded cap installed on the top of the compression spring and outside the piston rod.

[0007] Preferably, the oil storage cavity is connected to an annular groove on the outside of the main pin body through a radial hole, and the annular groove is U-shaped.

[0008] Preferably, the inner wall of the threaded cover is threadedly connected to the outer ring surface of the threaded ring, the outer ring surface of the piston rod is slidably connected to the inside of the threaded cover, and when the compression spring is in the extended state, the piston is in contact with the inner bottom of the oil reservoir and the limiting seat is in contact with the threaded cover at the same time.

[0009] Preferably, the bottom of the connecting seat is provided with a positioning groove, and the inner sidewall of the positioning groove is symmetrically provided with limit grooves at both ends. The top of the piston is provided with a positioning post, and the outer ring surface of the positioning post is symmetrically provided with limit blocks at both ends. The inner sidewall size of the limit groove is adapted to the outer ring surface size of the positioning post. When the positioning post is inserted into the interior of the positioning groove, the limit blocks on both sides are simultaneously inserted into the interior of the limit groove.

[0010] Preferably, telescopic rods are installed on both sides of the outer ends of the connecting seat, and a return spring is installed on the outer ring surface of the telescopic rod. A pull ring is installed on one end of both telescopic rods. A positioning rod is installed on the outside of the pull ring and between the two telescopic rods. The end of the positioning rod away from the pull ring passes through the connecting seat and extends into the positioning groove.

[0011] Preferably, the positioning pin has symmetrical positioning holes at both ends, and the positioning rod can be inserted into the positioning hole after extending into the positioning groove.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This invention relates to a wear-reducing automotive steering axle master pin. The oil reservoir and annular groove are connected via a radial hole, allowing grease in the reservoir to flow smoothly into the groove under pressure. When the reservoir is full of grease, the threaded cap is tightened onto the threaded ring, and the compression spring is at its shortest position. The elasticity of the compression spring continuously pushes the piston to move, injecting grease into the annular groove through the radial hole. When it is necessary to disassemble the connecting seat and piston, pulling the pull ring outward causes the telescopic rod to extend outward, simultaneously stretching the return spring. The pull ring then moves the positioning rod outward, causing it to exit the positioning hole on the positioning pin. At this point, the positioning pin is no longer fixed by the positioning rod and can be pulled out of the positioning groove, achieving separation of the connecting seat and piston. This facilitates replacement when the piston is damaged, offering convenient operation and improved practicality. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a utility model Figure 1 Internal structure diagram;

[0016] Figure 3 This is a utility model Figure 2 Partial structural diagram;

[0017] Figure 4 This is a utility model Figure 3 Partial structural layering diagram;

[0018] Figure 5 This is a utility model Figure 4 Partial structural diagram.

[0019] Explanation of reference numerals in the attached drawings: 1. Main pin shaft body; 101. Annular groove; 102. Oil reservoir; 103. Radial hole; 2. Threaded ring; 3. Piston; 4. Connecting seat; 401. Positioning groove; 402. Limiting groove; 5. Piston rod; 6. Limiting seat; 7. Compression spring; 8. Threaded cap; 9. Positioning pin; 901. Positioning hole; 10. Limiting block; 11. Telescopic rod; 12. Return spring; 13. Pull ring; 14. Positioning rod. Detailed Implementation

[0020] The following is in conjunction with the appendix Figure 1 - Figure 5 The present invention will be described in further detail below.

[0021] A type of automotive steering axle kingpin shaft that reduces wear, see reference Figure 1 - Figure 5 The system includes a main pin body 1, an annular groove 101 on the outer ring surface of the main pin body 1, an oil storage cavity 102 on the top of the main pin body 1, radial holes 103 symmetrically opened at both ends of the inner sidewall of the oil storage cavity 102, a threaded ring 2 installed on the top of the main pin body 1 and outside the oil storage cavity 102, a piston 3 installed inside the oil storage cavity 102, a connecting seat 4 on the top of the piston 3, a piston rod 5 installed on the top of the connecting seat 4, a limit seat 6 installed on the top of the piston rod 5, a compression spring 7 installed on the outer ring surface of the piston rod 5 and on the top of the connecting seat 4, and a threaded cap 8 installed on the top of the compression spring 7 and outside the piston rod 5.

[0022] Reference Figure 1 - Figure 3The oil reservoir 102 communicates with the annular groove 101 on the outside of the main pin body 1 through the radial hole 103. The annular groove 101 is U-shaped. The communication between the oil reservoir 102 and the annular groove 101 through the radial hole 103 allows the grease in the oil reservoir 102 to flow smoothly to the annular groove 101 under pressure. The U-shaped annular groove 101 can increase the storage space of the grease, allowing the grease to be better distributed on the outer ring surface of the main pin body 1. During the rotation of the main pin body 1, it can continuously provide lubrication to the contact parts, further reducing wear. The inner wall of the threaded cover 8 is threadedly connected to the outer ring surface of the threaded ring 2. The outer ring surface of the piston rod 5 is slidably connected to the inside of the threaded cover 8. When the compression spring 7 is in the extended state, it is active. The plug 3 is in contact with the bottom inner side of the oil reservoir 102, and the limiting seat 6 is in contact with the threaded cover 8. The threaded cover 8 is threadedly connected to the threaded ring 2, which facilitates the sealing and opening of the oil reservoir 102 for adding grease. The piston rod 5 slides inside the threaded cover 8, ensuring the stability of the piston rod 5's up and down movement. When the compression spring 7 is in the extended state, the piston 3 is in contact with the bottom inner side of the oil reservoir 102, and the limiting seat 6 is in contact with the threaded cover 8. This indicates that the grease has been used up and needs to be added. When the oil reservoir 102 is full of grease, the threaded cover 8 is tightened on the threaded ring 2, and the compression spring 7 is in its shortest state. The elasticity of the compression spring 7 continuously pushes the piston 3 to move and inject grease into the annular groove 101 through the radial hole 103.

[0023] Reference Figure 4 - Figure 5 The bottom of the connecting seat 4 is provided with a positioning groove 401. The inner sidewall of the positioning groove 401 is symmetrically provided with limiting grooves 402 at both ends. The top of the piston 3 is provided with a positioning post 9. The outer ring surface of the positioning post 9 is symmetrically provided with limiting blocks 10 at both ends. The inner sidewall size of the limiting groove 402 is adapted to the outer ring surface size of the positioning post 9. When the positioning post 9 is inserted into the interior of the positioning groove 401, the limiting blocks 10 on both sides are simultaneously inserted into the interior of the limiting groove 402. When installing the connecting seat 4 and the piston 3, the positioning post 9 on the top of the piston 3 is aligned with the positioning groove 401 at the bottom of the connecting seat 4 and inserted. At the same time, the limiting blocks 10 on the positioning post 9 are inserted into the limiting groove 402. Since the inner sidewall size of the limiting groove 402 is adapted to the outer ring surface size of the positioning post 9, the connection between the connecting seat 4 and the piston 3 can be guaranteed to be stable.

[0024] Reference Figure 4 - Figure 5Telescopic rods 11 are installed on both sides of the outer ends of the connecting seat 4. A return spring 12 is installed on the outer ring surface of the telescopic rod 11. A pull ring 13 is installed on one end of both telescopic rods 11. A positioning rod 14 is installed on the outside of the pull ring 13 and between the two telescopic rods 11. The end of the positioning rod 14 away from the pull ring 13 passes through the connecting seat 4 and extends into the positioning groove 401. Positioning holes 901 are symmetrically opened at both ends of the outer end of the positioning post 9. After the positioning rod 14 extends into the positioning groove 401, it can be connected into the positioning hole 901. When it is necessary to disassemble the connecting seat 4 and the piston 3, the pull ring 13 is pulled outward, and the pull ring 13 drives the telescopic rods 11 to extend outward. The length of the spring is increased, and the compression of the return spring 12 causes the pull ring 13 to move the positioning rod 14 outward, so that the positioning rod 14 exits from the positioning hole 901 on the positioning post 9. At this time, the positioning post 9 is no longer fixed by the positioning rod 14, and the positioning post 9 can be pulled out from the positioning groove 401 to separate the connecting seat 4 and the piston 3. During installation, after inserting the positioning post 9 into the positioning groove 401, the pull ring 13 is released. Under the elastic force of the return spring 12, the telescopic rod 11 retracts, and the pull ring 13 drives the positioning rod 14 to move inward, so that the positioning rod 14 is inserted into the positioning hole 901 on the positioning post 9, thereby fixing the connecting seat 4 and the piston 3. The operation is convenient and it is easy to replace the piston 3 when it is damaged.

[0025] The implementation principle of this utility model embodiment of a wear-reducing automotive steering axle master pin is as follows: When using this master pin, the oil reservoir 102 and the annular groove 101 are connected through the radial hole 103, allowing the grease in the oil reservoir 102 to flow smoothly to the annular groove 101 under pressure. The U-shaped annular groove 101 increases the grease storage space, allowing the grease to be better distributed on the outer ring surface of the master pin body 1. During the rotation of the master pin body 1, it can continuously provide lubrication to the contact parts, further reducing wear. Minimal wear; the threaded connection between the threaded cap 8 and the threaded ring 2 facilitates the sealing and opening of the oil reservoir 102, making it easy to add grease. The piston rod 5 slides within the threaded cap 8, ensuring the stability of its vertical movement. When the compression spring 7 is in its extended state, the piston 3 is in contact with the bottom inner side of the oil reservoir 102, and the limiting seat 6 is in contact with the threaded cap 8, indicating that the grease has been used up and needs to be added. When the oil reservoir 102 is full of grease, the threaded cap 8 is tightened onto the threaded ring 2, and the compression spring 7 is in its shortest state, allowing for... The elasticity of the overcompression spring 7 continuously pushes the piston 3 to move, injecting grease into the annular groove 101 through the radial hole 103. When it is necessary to disassemble the connecting seat 4 and the piston 3, the pull ring 13 is pulled outward. The pull ring 13 drives the telescopic rod 11 to extend outward, simultaneously stretching the return spring 12. The pull ring 13 drives the positioning rod 14 to move outward, causing the positioning rod 14 to exit from the positioning hole 901 on the positioning pin 9. At this time, the positioning pin 9 is no longer fixed by the positioning rod 14, and the positioning pin 9 can be pulled out from the positioning groove 401, realizing the connection between the connecting seat 4 and the piston 3. When separating and installing the connecting seat 4 and piston 3, align the positioning pin 9 on the top of piston 3 with the positioning groove 401 at the bottom of connecting seat 4 and insert it. At the same time, make the limiting block 10 on the positioning pin 9 enter the limiting groove 402. Then, release the pull ring 13. Under the elastic force of the return spring 12, the telescopic rod 11 retracts. The pull ring 13 drives the positioning rod 14 to move inward, so that the positioning rod 14 is inserted into the positioning hole 901 on the positioning pin 9, thereby fixing the connecting seat 4 and piston 3. This makes it easy to replace piston 3 when it is damaged. The operation is convenient and the practicality is better.

[0026] Finally, the following points should be noted: First, in the description of this utility model, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be interpreted broadly, and can be mechanical connection or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.

[0027] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0028] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0029] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A steering axle kingpin shaft for automobiles that reduces wear, comprising a kingpin shaft body (1), characterized in that: An annular groove (101) is provided on the outer ring surface of the main pin body (1). An oil storage cavity (102) is provided on the top of the main pin body (1). Radial holes (103) are symmetrically provided at both ends of the inner sidewall of the oil storage cavity (102). A threaded ring (2) is installed on the top of the main pin body (1) and outside the oil storage cavity (102). A piston (3) is installed inside the oil storage cavity (102). A connecting seat (4) is provided on the top of the piston (3). A piston rod (5) is installed on the top of the connecting seat (4). A limit seat (6) is installed on the top of the piston rod (5). A compression spring (7) is installed on the outer ring surface of the piston rod (5) and on the top of the connecting seat (4). A threaded cap (8) is installed on the top of the compression spring (7) and outside the piston rod (5).

2. The automotive steering axle kingpin shaft with reduced wear according to claim 1, characterized in that: The oil storage cavity (102) is connected to the annular groove (101) outside the main pin body (1) through a radial hole (103), and the annular groove (101) is U-shaped.

3. The automotive steering axle kingpin shaft with reduced wear according to claim 1, characterized in that: The inner wall of the threaded cover (8) is threadedly connected to the outer ring of the threaded ring (2), the outer ring of the piston rod (5) is slidably connected to the inside of the threaded cover (8), and when the compression spring (7) is in the extended state, the piston (3) is in contact with the bottom of the inner side of the oil storage chamber (102) and the limiting seat (6) is in contact with the threaded cover (8).

4. The automotive steering axle kingpin shaft with reduced wear according to claim 1, characterized in that: The bottom of the connecting seat (4) is provided with a positioning groove (401). The inner sidewall of the positioning groove (401) is symmetrically provided with limiting grooves (402) at both ends. The top of the piston (3) is provided with a positioning column (9). The outer ring surface of the positioning column (9) is symmetrically provided with limiting blocks (10). The inner sidewall size of the limiting groove (402) is adapted to the outer ring surface size of the positioning column (9). When the positioning column (9) is connected to the inside of the positioning groove (401), the limiting blocks (10) on both sides are simultaneously connected to the inside of the limiting groove (402).

5. A wear-reducing automotive steering axle kingpin shaft according to claim 4, characterized in that: Telescopic rods (11) are installed on both sides of the outer ends of the connecting seat (4). A return spring (12) is installed on the outer ring surface of the telescopic rod (11). A pull ring (13) is installed on one end of the two telescopic rods (11). A positioning rod (14) is installed on the outside of the pull ring (13) and between the two telescopic rods (11). The end of the positioning rod (14) away from the pull ring (13) passes through the connecting seat (4) and extends into the positioning groove (401).

6. A wear-reducing automotive steering axle kingpin shaft according to claim 5, characterized in that: The positioning pin (9) has symmetrical positioning holes (901) at both ends of its outer side. The positioning rod (14) extends into the positioning groove (401) and can be connected to the inside of the positioning hole (901).

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