Sealing structure for lower end of automobile steering rod

Abstract

The utility model discloses an automobile steering rod lower end sealing structure which comprises a steering rod body, the steering rod body is provided with a center through hole, a sealing plug is installed at the lower end of the center through hole, tooth-shaped structures distributed in the axial direction are arranged on the circumferential side wall of the sealing plug, and all the tooth-shaped structures are connected to the inner wall of the center through hole in an interference fit mode. The steering rod has the advantages that the tooth-shaped structure on the circumferential side wall of the sealing plug is in interference fit with the center through hole, the lower end of the steering rod can be blocked, dust, rainwater and the like are prevented from entering the steering rod, and the service life of the whole steering rod is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of steering gear technology, specifically to a sealing structure for the lower end of an automotive steering rod. Background Technology

[0002] The steering gear is one of the important components of a car. It can appropriately transform the steering torque and steering angle from the steering wheel and then output them to the steering tie rod mechanism, thereby turning the car.

[0003] In existing technology, the steering gear and steering wheel are connected by a steering rod, which has a hollow structure. Although this can reduce the overall weight of the steering assembly, the lower end of the hollow steering rod is exposed at the bottom of the vehicle, posing a risk of dust, rainwater, mud, and other contaminants entering, thus affecting the service life of the steering rod. Utility Model Content

[0004] In view of this, the present invention provides a sealing structure for the lower end of an automotive steering rod, which can seal the steering rod, avoid the above-mentioned situation, and thus ensure the service life of the steering rod.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A sealing structure for the lower end of an automotive steering rod, characterized in that: it includes a steering rod body, the steering rod body having a central through hole, a sealing plug being installed at the lower end of the central through hole, and the circumferential sidewall of the sealing plug having axially distributed toothed structures, each of the toothed structures being interference-fitted onto the inner wall of the central through hole.

[0007] By adopting the above structure, the toothed structure of the circumferential sidewall of the sealing plug is interference-fitted with the central through hole, which can seal the lower end of the steering rod, thereby preventing dust, rainwater and other substances from entering the steering rod and ensuring the overall service life of the steering rod.

[0008] Preferably, the lower end of the central through hole is provided with a countersunk hole, and the lower part of the sealing plug is provided with a support section, which is supported within the countersunk hole. With this structure, the support section can seal the end of the central through hole and also limit the installation position of the sealing plug.

[0009] Preferably, the support section has a positioning bevel near the toothed structure, and the positioning bevel abuts against the transition position between the countersunk hole and the central through hole. This structure allows for the limitation of the sealing plug's installation position.

[0010] Preferably, the lower end of the steering rod body is provided with a limiting protrusion extending radially inward along the central through hole. This structure prevents the sealing plug from falling off.

[0011] Preferably, the toothed structure includes at least triangular teeth and inverted teeth. The triangular teeth have beveled surfaces on both sides of their respective tooth tips, and the inverted teeth have beveled surfaces and a longitudinal plane on both sides of their respective tooth tips. The longitudinal plane is perpendicular to the axial direction of the sealing plug. Using this structure, the toothed structure can better ensure the sealing effect of the sealing plug.

[0012] Preferably, the reverse teeth are located at the end of the sealing plug furthest from the support section. With this structure, the reverse teeth facilitate the installation of the sealing plug from the lower end of the central through-hole while effectively preventing the sealing plug from falling off.

[0013] Preferably, there are two sets of triangular teeth, and the two sets of triangular teeth are located in the middle of the sealing plug. This structure further ensures the sealing effect of the sealing plug.

[0014] Preferably, the sealing plug is made of elastic rubber. This structure ensures both the sealing performance and service life of the sealing plug.

[0015] Preferably, a hinge seat is welded to the lower end of the steering rod body, and the countersunk hole is located on the hinge seat. With this structure, the hinge seat facilitates connection to the steering gear.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. The sealing structure at the lower end of the automotive steering rod provided by this utility model can seal the lower end of the steering rod by interfering with the central through hole through the toothed structure of the circumferential side wall of the sealing plug, thereby preventing dust, rainwater and other substances from entering the interior of the steering rod and ensuring the overall service life of the steering rod.

[0018] 2. The reverse tooth structure and the limiting protrusion at the lower end of the steering rod body form a two-stage anti-detachment structure, ensuring that the sealing plug will not easily fall off after being disassembled. Attached Figure Description

[0019] Figure 1 A three-dimensional view of the sealing structure at the lower end of a car steering rod;

[0020] Figure 2 This is a schematic diagram of the structure of sealing plug 2;

[0021] Figure 3 A cross-sectional view showing the internal structure of the steering rod body 1;

[0022] Figure 4 for Figure 1 A partial sectional view;

[0023] Figure 5 for Figure 4A magnified view of a portion of the image;

[0024] Figure 6 This is a schematic diagram illustrating the structure of the limiting protrusion 1c. Detailed Implementation

[0025] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0026] like Figures 1 to 5 As shown, a lower end sealing structure for an automobile steering rod includes a steering rod body 1. The steering rod body 1 has a central through hole 1a extending along its length direction. A sealing plug 2 is installed at the lower end of the central through hole 1a. The circumferential sidewall of the sealing plug 2 is formed with toothed structures 2a distributed along the axial direction. Each toothed structure 2a is interference-fitted to the inner wall of the central through hole 1a.

[0027] This design, with the toothed structure 2a formed on the circumferential sidewall of the sealing plug 2, is interference-fitted into the central through hole 1a, which can seal the lower end of the steering rod body 1, thereby preventing rainwater, dust, etc. from entering the interior of the steering rod body 1 and ensuring the service life of the steering rod body 1.

[0028] like Figure 3 and Figure 4 As shown, a countersunk hole 1b is formed at the lower end of the central through hole 1a, and a support section 2b is formed at the lower end of the sealing plug 2. The support section 2b is supported in the countersunk hole 1b. With this design, the lower end of the central through hole 1a can be sealed by the support section 2b, and the installation position of the sealing plug 2 can also be limited to prevent the installation position of the sealing plug 2 from being too deep.

[0029] Furthermore, such as Figure 6 As shown, a hinge seat 1d is welded to the lower end of the steering rod body 1, and a countersunk hole 1b is located on the hinge seat 1d. A positioning inclined surface 2c is formed at the end of the support section 2b near the tooth structure 2a. The positioning inclined surface 2c abuts against the transition position between the countersunk hole 1b and the central through hole 1a. With this design, the installation position of the sealing plug 2 can be further limited by the positioning inclined surface 2c.

[0030] like Figure 6 As shown, the lower end of the steering rod body 1 is formed with a limiting protrusion 1c extending radially inward along the central through hole 1a. The limiting protrusion 1c can effectively prevent the sealing plug 2 from falling off from the lower end of the central through hole 1a. In this embodiment, the limiting protrusion 1c is also formed on the hinge seat 1d.

[0031] In this embodiment, the tooth-like structure 2a includes at least a triangular tooth 2a1 and an inverted tooth 2a2. The triangular tooth 2a1 has an inclined surface 2a3 on both sides of the tooth tip, and the inverted tooth 2a2 has an inclined surface 2a3 and a longitudinal plane 2a4 on both sides of the tooth tip. The longitudinal plane 2a4 is perpendicular to the axis of the sealing plug 2.

[0032] like Figure 2 and Figure 5 As shown, the inverted teeth 2a2 are formed at the end of the sealing plug 2 away from the support section 2b, while two sets of triangular teeth 2a1 are formed, with the two sets of triangular teeth 2a1 formed in the middle of the sealing plug 2. This design allows the sealing plug 2 to be easily inserted into the central through hole 1a through the inverted teeth 2a2, while also preventing the sealing plug 2 from falling downwards. The two sets of triangular teeth 2a1 form a multi-level seal, which can further ensure the sealing performance of the sealing plug 2, thereby preventing rainwater, dust, etc. from entering the interior of the steering rod body 1.

[0033] To ensure the sealing performance and service life of the sealing plug 2, in this embodiment, the sealing plug 2 is made of elastic rubber.

[0034] Finally, it should be noted that the above description is merely a preferred embodiment of the present utility model. Those skilled in the art, under the guidance of the present utility model, can make various similar representations without departing from the spirit and claims of the present utility model, and such modifications all fall within the protection scope of the present utility model.

Claims

1. A sealing structure for the lower end of an automotive steering rod, characterized in that: The steering rod body (1) includes a central through hole (1a), and a sealing plug (2) is installed at the lower end of the central through hole (1a). The sealing plug (2) has axially distributed toothed structures (2a) on its circumferential sidewall, and each toothed structure (2a) is interference-fitted to the inner wall of the central through hole (1a).

2. The sealing structure at the lower end of the automotive steering rod according to claim 1, characterized in that: The lower end of the central through hole (1a) is provided with a countersunk hole (1b), and the lower part of the sealing plug (2) is provided with a support section (2b), which is supported in the countersunk hole (1b).

3. The sealing structure at the lower end of the automotive steering rod according to claim 2, characterized in that: The support section (2b) has a positioning inclined surface (2c) at one end near the toothed structure (2a), and the positioning inclined surface (2c) abuts against the transition position between the countersunk hole (1b) and the central through hole (1a).

4. The sealing structure at the lower end of the automotive steering rod according to claim 1, characterized in that: The lower end of the steering rod body (1) is provided with a limiting protrusion (1c) extending radially inward along the central through hole (1a).

5. The sealing structure at the lower end of the automotive steering rod according to claim 2, characterized in that: The tooth-like structure (2a) includes at least a triangular tooth (2a1) and a reverse tooth (2a2). The triangular tooth (2a1) has a chamfer (2a3) on both sides of the tooth tip. The reverse tooth (2a2) has a chamfer (2a3) and a longitudinal plane (2a4) on both sides of the tooth tip. The longitudinal plane (2a4) is perpendicular to the axial direction of the sealing plug (2).

6. The sealing structure at the lower end of the automotive steering rod according to claim 5, characterized in that: The reverse tooth (2a2) is disposed at one end of the sealing plug (2) away from the support section (2b).

7. The sealing structure at the lower end of the automotive steering rod according to claim 5, characterized in that: There are two sets of triangular teeth (2a1), and the two sets of triangular teeth (2a1) are located in the middle of the sealing plug (2).

8. The sealing structure at the lower end of the automotive steering rod according to claim 1, characterized in that: The sealing plug (2) is made of elastic rubber.

9. The sealing structure at the lower end of the automotive steering rod according to claim 2, characterized in that: The lower end of the steering rod body (1) is welded with a hinge seat (1d), and the countersunk hole (1b) is located on the hinge seat (1d).

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