Rubber bushing structure capable of preventing following rotation

Abstract

The utility model relates to the technical field of steering systems, in particular to an anti-following-rotation rubber bushing structure. The utility model relates to an anti-following-rotation rubber bushing structure which comprises a lining and a bushing, and is characterized in that the lining is embedded in the bushing; the lining is of a T-shaped structure, the upper portion of the lining is of a disc-shaped structure, the top end face of the disc-shaped structure is a large end face, the bottom end face of the disc-shaped structure is a small end face, and a plurality of kidney-shaped bosses are evenly distributed on the circumferential face of the small end face. The lower portion of the lining is of a cylindrical structure, and a plurality of strip-shaped bosses are evenly distributed on the outer circumference of the cylindrical structure. Compared with the prior art, according to the rubber bushing structure capable of preventing following rotation, the kidney-shaped bosses are evenly added on the whole circumference of the lower end face, matched with the shell, of the rubber bushing, so that the friction coefficient between the rubber bushing and the end face of the shell is increased, following rotation of the bushing and the shell is prevented when a nut is tightened, and therefore the problem that tightening torque cannot be achieved is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of steering systems, in particular to a rubber bushing structure for preventing heel rotation. Background Art

[0002] The connection between the steering gear and the subframe can be divided into rigid connection or flexible connection. With the rapid popularization of new energy vehicles, the market has put forward higher and higher requirements for the NVH performance and steering comfort of the vehicle, so flexible connection is being widely used. The flexible connection is achieved by equipping the mounting hole of the steering gear long housing with a rubber bushing composed of steel lining and rubber and locking it with bolts and nuts between the mounting points of the subframe. When the road surface is impacted and vibrated, the rubber bushing can greatly improve the vibration isolation effect of the system, reduce the noise caused by uneven road surface, and play a role in vibration reduction and noise reduction.

[0003] In the current steering gear assembly, the traditional method is to use smooth and regular rubber bushings for counter-pressure. The bushings are made of rubber and metal substrates by vulcanization, and the rubber bushings and the steering gear housing are interference fit. However, in the process of assembling the steering gear to the vehicle, it is found that when the mounting hole fixing bolts and mounting nuts are rotated and locked, the rubber bushings often rotate to varying degrees relative to the housing end face, resulting in the locking nut failing to reach the tightening torque, false torque, and difficulty in vehicle installation. Summary of the invention

[0004] The utility model provides a rubber bushing structure for preventing rotation when the nut is tightened, thereby effectively preventing the rubber bushing from rotating when the nut is tightened, thereby preventing the locking nut from being unable to be tightened, and solving the problem of difficulty in vehicle installation.

[0005] In order to achieve the above-mentioned purpose, a rubber bushing structure for preventing heel rotation is designed, including an inner lining and a bushing, and its characteristics are: the inner lining is embedded in the bushing; the bushing is a T-shaped structure, the upper part of the bushing is a disc-shaped structure, the top end surface of the disc-shaped structure is a large end surface, the bottom end surface of the disc-shaped structure is a small end surface, and a number of waist-shaped bosses are evenly distributed on the circumferential surface of the small end surface; the lower part of the bushing is a cylindrical structure, and a number of strip-shaped bosses are evenly distributed on the outer circumference of the cylindrical structure.

[0006] The lining is a T-shaped structure and is a metal lining.

[0007] The bushing is a rubber bushing.

[0008] There are at least 8 waist-shaped bosses, and the 8 waist-shaped bosses are evenly distributed on the circumference of the lower end surface of the upper part of the bushing at 0°, 45°, 90°, 135°, 180°, 225°, 270°, and 315°.

[0009] The waist-shaped boss is a waist-shaped radial boss.

[0010] The size of the waist-shaped boss is 4 mm in length, 2 mm in width and 1 mm in height.

[0011] There are at least two strip-shaped bosses, and the two strip-shaped bosses are evenly distributed on the circumference of the lower part of the bushing at 0° and 180°.

[0012] The strip-shaped boss is a rectangular module structure.

[0013] The dimensions of the strip-shaped boss are 6 mm in length, 1 mm in width and 0.5 mm in height.

[0014] The waist-shaped boss, the strip-shaped boss, the small end surface of the bushing and the lower part of the bushing are integrally vulcanized and formed through a mold.

[0015] Compared with the prior art, the utility model provides a rubber bushing structure for preventing heel rotation, and waist-shaped bosses are evenly added around the lower end surface of the rubber bushing that cooperates with the shell, so as to increase the friction coefficient between the bushing and the end surface of the shell, prevent the bushing and the shell from heeling when tightening the nut, thereby avoiding the problem of failing to reach the tightening torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model.

[0017] Figure 2 Schematic diagram of the distribution of waist-shaped bosses.

[0018] Figure 3 It is a cross-sectional view of the connection between the structure of the utility model and the shell. DETAILED DESCRIPTION

[0019] The utility model is further described below with reference to the accompanying drawings.

[0020] In view of the problem that traditional rubber bushings are prone to follow-up rotation during vehicle assembly, resulting in failure to achieve the tightening torque, the utility model designs a rubber bushing structure that prevents follow-up rotation. Waist-shaped bosses are evenly added to the lower end surface of the rubber bushing that matches the shell to increase the friction coefficient between it and the shell end surface, preventing the bushing and the shell from following rotation when tightening the nut, thereby avoiding the problem of failure to achieve the tightening torque.

[0021] like Figure 1 , Figure 2As shown, the bushing 2 is embedded with an inner lining 1; the bushing 2 is a T-shaped structure, the upper part of the bushing 2 is a disc-shaped structure, the top end surface of the disc-shaped structure is a large end surface 2-1, the bottom end surface of the disc-shaped structure is a small end surface 2-2, and a number of waist-shaped bosses 3 are evenly distributed on the circumferential surface of the small end surface 2-2; the lower part of the bushing 2 is a cylindrical structure, and a number of strip-shaped bosses 4 are evenly distributed on the outer circumference of the cylindrical structure.

[0022] The lining 1 is a T-shaped structure and is a metal lining.

[0023] The bushing 2 is a rubber bushing.

[0024] There are at least eight waist-shaped bosses 3, and the eight waist-shaped bosses 3 are evenly distributed on the circumference of the upper lower end surface of the bushing 2 at 0°, 45°, 90°, 135°, 180°, 225°, 270°, and 315°.

[0025] The waist-shaped boss 3 is a waist-shaped radial boss.

[0026] The size of the waist-shaped boss 3 is 4 mm in length, 2 mm in width and 1 mm in height.

[0027] At least two strip-shaped bosses 4 are provided, and the two strip-shaped bosses 4 are evenly distributed on the circumference of the lower part of the bushing 2 at angles of 0° and 180°.

[0028] The strip-shaped boss 4 is a rectangular module structure.

[0029] The dimensions of the strip-shaped boss 4 are 6 mm in length, 1 mm in width and 0.5 mm in height.

[0030] The waist-shaped boss 3, the strip-shaped boss 4, the small end surface 2-2 of the bushing 2 and the lower part of the bushing 2 are integrally vulcanized and formed through a mold.

[0031] The large end face 2-2 of the bushing 2 (i.e., the end face that cooperates with the bolt and nut) is a plane, and the small end face 2-1 (i.e., the end face that cooperates with the shell 5) has 8 waist-shaped bosses 3 evenly distributed around the circumference. The waist-shaped bosses 3 are waist-shaped radial bosses, and there are two symmetrically distributed strip bosses 4 on the circumferential surface of the cylindrical structure of the bushing 2.

[0032] The specific size of the waist-shaped boss 3 can be determined according to the size of the end face of the mounting hole and the required friction coefficient (generally 4mm long, 2mm wide, and 1mm high); the 8 waist-shaped bosses 3 are evenly distributed on the entire circumference at 0°, 45°, 90°, 135°, 180°, 225°, 270°, and 315°.

[0033] The specific size of the strip-shaped boss 4 can be determined according to the height of the mounting hole (generally 6 mm in length, 1 mm in width, and 0.5 mm in height); the two strip-shaped bosses 4 are evenly distributed on the entire circumference at 0° and 180°.

[0034] The waist-shaped boss 3 and the strip-shaped boss 4 can be integrally vulcanized and formed with the small end face 2 - 2 and the circumferential face of the bushing 2 through a mold.

[0035] like Figure 3 As shown, the outer side of the bushing 2 is in contact with the housing 5, and eight waist-shaped bosses 3 are evenly distributed on the circumference of the small end face 2-2 of the bushing 2. In addition, in order to facilitate the bushing 2 to be pressed into the housing 5, there are two symmetrical strip-shaped bosses 4 on the circumferential surface of the cylindrical structure at the bottom of the bushing 2. When the whole vehicle is installed, due to the presence of the waist-shaped bosses 3 on the small end face 2-2 of the bushing 2, the friction coefficient between the cylindrical structure at the bottom of the bushing 2 and the housing 5 is much greater than the friction coefficient between the locking nut and the large end face 2-1 of the bushing 2, which can effectively prevent the bushing 2 from rotating during the tightening process of the locking nut, and ensure the stability of the locking torque.

[0036] The utility model uses an anti-rotation rubber bushing structure, and adds a circle of waist-shaped radial bosses on the small end face of the bushing that cooperates with the shell, thereby increasing the friction coefficient of the contact surface between the rubber bushing and the shell, and improving the friction torque between the two, thereby preventing the rubber bushing from rotating during the installation and tightening process of the whole vehicle, facilitating the installation of the whole vehicle and ensuring the stability of the tightening torque, thereby improving the noise and vibration reduction performance of the steering gear and improving the steering comfort of the whole vehicle.

Claims

1. A rubber bushing structure for preventing heel rotation, comprising an inner lining and a bushing, characterized in that: The bushing (2) is embedded with an inner lining (1); the bushing (2) is a T-shaped structure, the upper part of the bushing (2) is a disc-shaped structure, the top end surface of the disc-shaped structure is a large end surface (2-1), the bottom end surface of the disc-shaped structure is a small end surface (2-2), and a plurality of waist-shaped bosses (3) are evenly distributed on the circumference of the small end surface (2-2); the lower part of the bushing (2) is a cylindrical structure, and a plurality of strip-shaped bosses (4) are evenly distributed on the outer circumference of the cylindrical structure.

2. The anti-heel-rotation rubber bushing structure according to claim 1, characterized in that: The lining (1) is a T-shaped structure, and the lining (1) is a metal lining.

3. The anti-heel-rotation rubber bushing structure according to claim 1, characterized in that: The bushing (2) is a rubber bushing.

4. The anti-heel-rotation rubber bushing structure according to claim 1, characterized in that: At least eight waist-shaped bosses (3) are provided, and the eight waist-shaped bosses (3) are evenly distributed on the circumference of the upper lower end surface of the bushing (2) at angles of 0°, 45°, 90°, 135°, 180°, 225°, 270°, and 315°.

5. The anti-heel rotation rubber bushing structure according to claim 1 or 4, characterized in that: The waist-shaped boss (3) is a waist-shaped radial boss.

6. The anti-heel-rotation rubber bushing structure according to claim 1 or 4, characterized in that: The dimensions of the waist-shaped boss (3) are 4 mm in length, 2 mm in width and 1 mm in height.

7. The anti-heel-rotation rubber bushing structure according to claim 1, characterized in that: At least two of the strip-shaped bosses (4) are provided, and the two strip-shaped bosses (4) are evenly distributed at 0° and 180° on the circumference of the lower part of the bushing (2).

8. The anti-heel rotation rubber bushing structure according to claim 1 or 7, characterized in that: The strip-shaped boss (4) is a rectangular module structure.

9. The anti-heel rotation rubber bushing structure according to claim 1 or 7, characterized in that: The dimensions of the strip-shaped boss (4) are 6 mm in length, 1 mm in width and 0.5 mm in height.

10. The anti-heel-rotation rubber bushing structure according to claim 1, characterized in that: The waist-shaped boss (3), the strip-shaped boss (4), the small end surface (2-2) of the bushing (2), and the lower part of the bushing (2) are integrally vulcanized and formed through a mold.

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