Bearing for universal joint for vehicle

Abstract

The utility model discloses a bearing for a universal joint for a vehicle, which comprises a bearing outer ring and a bearing inner ring which are nested with each other, and a roller pin is arranged between the bearing outer ring and the bearing inner ring; the inner side of the bearing inner ring is provided with an inner arc, and the bottom surface is provided with an inner ring slope. The requirement for assembling the bearing inner ring and the three-fork shaft is met, the using performance of the bearing is improved, the service life of the bearing is prolonged, and the defect that the bearing is affected due to interference during installation is overcome. The utility model not only is convenient to process, but also can meet the assembly requirements of products, improves the grade of the products, and has strong practicability.

Description

Technical Field

[0001] The utility model relates to a bearing for a vehicle universal joint, belonging to the technical field of bearings for an automotive steering system. Background Art

[0002] Bearings are widely used in vehicle universal joints. When assembling the bearings for universal joints, the inner spherical surface of the inner ring and the three-fork shaft are press-fitted with interference and then move with clearance fit. Therefore, if there are burrs at the contact points between the inner ring of the bearing and the three-fork shaft during assembly, it will interfere with the installation of the bearing. At the same time, stress concentration will occur during the extrusion process, and in severe cases, the assembly surface of the inner hole of the bearing will be damaged. Whether the bearing is installed well or not will directly affect the accuracy, service life and performance of the bearing. Therefore, all mating and connecting surfaces must be smooth and free of burrs before installation. Summary of the Invention

[0003] The technical problem to be solved by the utility model is: how to avoid the defects caused by the interference problem during installation and affect the service life of the bearing on the premise of meeting the assembly requirements of the bearing and the three-fork shaft.

[0004] To solve the above technical problem, the utility model provides a bearing for a vehicle universal joint, which includes an outer bearing ring and an inner bearing ring nested with each other. Needle rollers are arranged between the outer bearing ring and the inner bearing ring; an inner arc is arranged on the inner side of the inner bearing ring, and an inner ring inclined surface is arranged on the bottom surface.

[0005] Preferably, limiting structures for limiting the upper and lower ends of the needle rollers are arranged on the upper and lower sides of the inner wall of the outer bearing ring.

[0006] Preferably, the inner arc and the inner ring inclined surface on the inner bearing ring are connected by an assembly fillet with a transition.

[0007] More preferably, the inner arc, the assembly fillet and the inner ring inclined surface on the inner bearing ring are smoothly connected.

[0008] More preferably, the specification of the assembly fillet is R0.4.

[0009] The utility model meets the assembly requirements of the inner ring of the bearing and the three-fork shaft, improves the service performance and life of the bearing, and avoids the defects of the bearing affected by the interference during installation. The utility model is not only convenient for processing, but also can meet the assembly requirements of the product, improves the product grade, and has strong practicability. Brief Description of the Drawings

[0010] Figure 1 is a cross-sectional view of the bearing for a vehicle universal joint provided by the utility model;

[0011] Figure 2 is a schematic diagram of the assembly fillet. Detailed Description of the Invention

[0012] To make the present utility model more obvious and understandable, the following is a detailed description with preferred embodiments and in conjunction with the accompanying drawings.

[0013] Embodiment

[0014] As Figure 1 shown, a bearing for a vehicle universal joint provided by the present utility model includes an outer bearing ring 1 and an inner bearing ring 2 nested with each other. Needle rollers 3 are arranged between the outer bearing ring 1 and the inner bearing ring 2. An inner arc 4 is provided on the inner side of the inner bearing ring 2, and an inner ring inclined surface 6 is provided on the bottom surface. The inner arc 4 and the inner ring inclined surface 6 are transitionally connected through an assembly fillet 5. The inner arc 4, the assembly fillet 5, and the inner ring inclined surface 6 on the inner bearing ring 2 are smoothly connected. In this way, when the bearing is assembled with the three-fork shaft, the bearing and the three-fork shaft will not be scratched or have indentation due to the interference fit between the two, preventing the premature failure of the product life.

[0015] Limiting structures for limiting the upper and lower ends of the needle rollers 3 are provided on the upper and lower sides of the inner wall of the outer bearing ring 1.

[0016] As Figure 2 shown, the specification of the assembly fillet 5 is R0.4.

Claims

1. A bearing for a universal joint of a vehicle, characterized in that, It includes a bearing outer ring (1) and a bearing inner ring (2) that are nested with each other, and needle rollers (3) are provided between the bearing outer ring (1) and the bearing inner ring (2); an inner arc (4) is provided on the inner side of the bearing inner ring (2), and an inner ring inclined surface (6) is provided on the bottom surface.

2. The bearing for a vehicle universal joint according to claim 1, wherein, Limit structures for limiting the upper and lower ends of the needle rollers (3) are provided on the upper and lower sides of the inner wall of the bearing outer ring (1).

3. The bearing for a vehicle universal joint according to claim 1, characterized in that, On the bearing inner ring (2), a transition connection is made between the inner arc (4) and the inner ring inclined surface (6) through an assembly fillet (5).

4. The bearing for a vehicle universal joint according to claim 3, wherein The inner arc (4), the assembly fillet (5), and the inner ring inclined surface (6) on the bearing inner ring (2) are smoothly connected.

5. The bearing for a vehicle universal joint according to claim 3, wherein The specification of the assembly fillet (5) is R0.4.

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