CN201027796Y - Automobile steering tie rod pin assembly - Google Patents

Abstract

The utility model provides an automobile steering tie rod pin assembly, which includes a pin shaft seat, a bushing, a pin shaft, a slot nut, a non-metallic gasket, a baffle, and a dust cover. The lower end of the bushing is placed under the pin shaft. On the step, a spherical fit is adopted between the lower end of the bushing and the lower step of the bearing pin. The matching spherical diameter Sφ=1.5～2.0d between the lower end of the bush and the lower step of the pin shaft, where d is the diameter of the pin shaft. The utility model adopts the spherical surface centering principle to compensate the gap generated by the relative sliding between parts, solves the problem of looseness of the assembly under heavy load, and effectively improves the stress mode of the pin shaft.

Description

Automobile steering tie rod pin assembly

technical field

The utility model relates to a steering rod pin assembly of an automobile, which belongs to automobile components, in particular to a new structure of the steering rod system pin assembly of the automobile.

Background technique

The function of the pin assembly of the steering tie rod of the automobile is to connect two rods or arms: one end of the pin seat is connected to the rod or arm, and the conical surface of the pin is connected to the other rod or arm. Through the sliding of the pin shaft in the pin shaft seat, the thrust or pull force is transmitted between the rods or the arms. The lower end of the bushing of the existing column pin assembly is in plane contact with the lower step of the pin shaft. There is no centering fit between the pin shaft and the bushing, which will cause looseness in the radial direction of the pin shaft, that is, the pin shaft will be in the bushing. Shake in the middle, thereby increasing the idle travel of the steering system and reducing the response time of the steering system. Dongfeng Mengshi 1.5t high-mobility military off-road vehicle requires a vehicle test of 30,000 kilometers (6,000 kilometers for high-speed rings, 6,000 kilometers for mountainous areas, 12,000 kilometers for comprehensive roads, and 6,000 kilometers for off-road roads). Kuang. The pin assembly described above cannot meet this requirement.

Contents of the invention

The purpose of the utility model is to provide an automobile steering tie rod pin assembly with a simple structure and no looseness in the radial direction of the pin shaft, that is, with a radial compensation function.

Technical scheme of the present utility model: the steering rod pin assembly of the utility model includes a pin seat, a bushing, a pin shaft, a groove nut, a non-metallic gasket, a baffle plate, and a dust cover, and the lower end of the bushing is placed On the lower step of the pin shaft, a spherical fit is adopted between the lower end of the bushing and the lower step of the pin shaft.

In said automobile steering tie rod pin assembly, the fitting spherical surface diameter Sφ between the lower end of the bush and the lower step of the pin shaft is 1.5-2.0d, where d is the diameter of the pin shaft.

The advantages of the utility model: the utility model adopts the principle of spherical centering to compensate the gap caused by the relative sliding between parts, and solves the problem of looseness of the assembly under heavy load.

The utility model also effectively improves the force bearing mode of the pin shaft. The length of the force arm of the column pin bearing the bending moment is greater than that of the prior art, and the stress of each position of the pin shaft is more uniform than that of the prior art, and accordingly its degree of wear is lighter than that of the prior art.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

In FIG. 1 , the bushing 5 is pressed into the pin seat 4 through an interference fit, and there is no relative slippage between the two. The upper end of the pin shaft 2 and the bushing 5 adopts a cylindrical clearance fit; the lower end of the bushing and the lower step of the pin shaft adopt a spherical fit. The lower step is part spherical; the lower end of the bushing is part bowl. The diameter of the spherical surface is Sφ=1.5～2.0d, and d is the diameter of the pin shaft. After the baffle plate 7 is fixed by rolling riveting, the non-metallic liner 6 produces elastic deformation, so that the spherical surface 2.1 of the pin shaft 2 and the spherical surface 5.1 of the bushing 5 closely fit. When the cylindrical surface of the pin shaft 2 and the cylindrical surface of the bushing 5 become larger due to repeated slippage, the spherically fitted pin assembly of the utility model always relies on the elastic force of the non-metallic liner 6 to make the gap larger. The spherical surface 2.1 of the pin shaft 2 is closely matched with the spherical surface 5.1 of the bushing 5, which compensates the gap between the pin shaft 2 and the bushing 5 in the radial direction, so that the pin shaft 2 cannot move in the radial direction after wear, thereby preventing The looseness of the pin shaft. 1 is a slot nut, 7 is a baffle plate, and 8 is a grease nipple.

At the same time, the utility model effectively improves the stress mode of the pin shaft 2 . When the column pin 2 of the utility model is subjected to a bending moment, because the moment arm length (H1 in Fig. 1 ) for bearing the bending moment is greater than that of the prior art, the stress of each part of the pin shaft is more uniform than that of the prior art, and accordingly its The degree of wear is lighter than that of the prior art.

The utility model also can be self-lubricating structure, does not need grease nipple 8.

The core of the utility model is that the pin shaft and the lower end of the bush adopt a spherical fit to compensate the radial clearance. Therefore, all the bearing pins and the lower end of the bushing adopt spherical fit, all belong to the protection scope of the present utility model.

Claims (2)

1. An automobile steering rod pin assembly, including a pin seat, a bushing, a pin shaft, a slotted nut, a non-metallic gasket, a baffle, and a dust cover, and the lower end of the bushing is placed on the lower step of the pin shaft , is characterized in that: the lower end of the bush and the lower step of the pin shaft adopt a spherical fit. 2. The steering tie rod pin assembly according to claim 1, characterized in that: the diameter of the spherical surface Sφ=1.5-2.0d, where d is the diameter of the pin shaft.

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