Novel steering column bearing

Abstract

The utility model discloses a novel steering column bearing which comprises an outer sleeve, an outer ring assembly arranged on the inner side of the outer sleeve in the circumferential direction, an inner ring arranged on the inner side of the outer ring assembly in the circumferential direction, an elastic assembly arranged on the outer side of the outer ring assembly in the circumferential direction and a plurality of rolling bodies arranged between the outer ring assembly and the inner ring. The side wall of the inner ring is in a wave shape, a first groove located in the middle and two second grooves formed in the two sides of the first groove are formed in the outer wall of the inner ring, the first groove and the second grooves extend in the circumferential direction of the inner ring, and a roller path matched with the rolling bodies is formed between the first groove and the outer ring assembly. A regular polygon wall face is arranged on the portion, corresponding to the second groove, of the inner wall of the inner ring, and a plurality of protrusions arranged in the circumferential direction of the inner ring at intervals are arranged on the regular polygon wall face. The novel steering column bearing provided by the utility model is convenient to install, reduces cracks and ensures the stability of the structure.

Description

TECHNICAL FIELD

[0001] The utility model relates to bearing technical field, especially a novel steering column bearing. BACKGROUND

[0002] The bearing of the existing commonly used automobile steering column is a common ball bearing, the inner ring of the common ball bearing is a common circular ring structure, the outer diameter of the steering input shaft requires high machining precision, and if the interference amount is too large or inappropriate, the inner ring will crack. SUMMARY

[0003] The utility model discloses a novel steering column bearing, convenient assembly reduces the problem of bearing cracking.

[0004] Based on the above problems, the technical scheme provided by the utility model is:

[0005] A novel steering column bearing, comprising a sleeve, an outer ring assembly arranged on the circumferential inner side of the sleeve, an inner ring arranged on the circumferential inner side of the outer ring assembly, an elastic assembly arranged between the outer ring assembly and the sleeve, and a plurality of rolling bodies arranged between the outer ring assembly and the inner ring.

[0006] The side wall of the inner ring is in a wave shape, a first groove located in the middle is formed on the outer wall of the inner ring, and two second grooves are arranged on the two sides of the first groove, the first groove and the second groove both extend along the circumference of the inner ring, and a rolling groove matched with the rolling bodies is formed between the first groove and the outer ring assembly.

[0007] A regular polygon wall surface is arranged on the part corresponding to the second groove on the inner wall of the inner ring, and a plurality of protrusions are arranged on the regular polygon wall surface and spaced along the circumference of the inner ring.

[0008] In some embodiments, the longitudinal section of the first groove is in a trapezoidal shape.

[0009] In some embodiments, the outer ring assembly comprises a first outer ring and a second outer ring symmetrically arranged on the two sides of the rolling bodies, and the elastic assembly comprises a first elastic body arranged between the first outer ring and the sleeve and a second elastic body arranged between the second outer ring and the sleeve.

[0010] In some embodiments, the rolling groove surface matched with the rolling bodies by the first outer ring and the second outer ring is a conical surface.

[0011] In some embodiments, the first outer ring comprises a first ring body, a rolling groove part and a second ring body connected in sequence, the outer diameter of the second ring body is larger than that of the first ring body, and the rolling groove part is gradually expanded from the first ring body to the second ring body.

[0012] The second outer ring has the same structure as the first outer ring.

[0013] In some embodiments, a limiting groove is formed between the first ring body and the second ring body and cooperates with the first elastic body / second elastic body.

[0014] In some embodiments, the first elastic body and the second elastic body are O-shaped rubber rings.

[0015] In some embodiments, the protrusions are ellipsoidal.

[0016] In some embodiments, the height of the protrusions is 0.2-0.3 mm.

[0017] In some embodiments, the number of sides of the regular polygon ranges from 12 to 20.

[0018] Compared with the prior art, the utility model has the advantages of:

[0019] (1) The inner ring is provided with regular polygon wall surfaces on both axial sides, and is not prone to cracking, and the outer diameter of the steering input shaft does not need to have extremely high machining precision, and the deformation of the inner ring is concentrated on both sides of the raceway during press fitting, so that the raceway is prevented from being greatly deformed during assembly;

[0020] (2) The inner ring is provided with a plurality of protrusions arranged at intervals in the circumferential direction, which can guide the press-fitted steering input shaft;

[0021] (3) The elastic assembly between the outer ring assembly and the outer sleeve can provide a certain pre-tightening force in the bearing by compression or rebound, and at the same time, compensate for the up-down misalignment of the steering column assembly, so that the entire bearing has a certain aligning ability;

[0022] (4) The longitudinal section of the first groove is trapezoidal, and the raceway surface between the first outer ring, the second outer ring and the rolling element is conical, so that the entire raceway is double-V-shaped, the curvature radius coefficient is approximately infinite, the rolling element can better realize low friction during operation, and the four-point contact ball bearing design can simultaneously bear bidirectional load, and at the same time, the rigidity performance of the bearing is considered. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0024] Figure 1 This is a schematic diagram of the structure of an embodiment of a novel steering column bearing according to the present invention;

[0025] Figure 2 This is one of the structural schematic diagrams of the inner ring in the embodiments of this utility model;

[0026] Figure 3 This is the second schematic diagram of the inner ring structure in an embodiment of this utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the first outer ring in an embodiment of this utility model;

[0028] Figure 5 This is a schematic diagram of the centering state in an embodiment of this utility model;

[0029] in:

[0030] 1. Outerwear;

[0031] 2. Inner ring; 2-1. First groove; 2-2. Second groove; 2-3. Regular polygonal wall; 2-4. Protrusion;

[0032] 3. First outer ring; 3-1. First ring body; 3-2. Raceway section; 3-3. Second ring body;

[0033] 4. Second outer ring;

[0034] 5. First elastic body;

[0035] 6. Second elastic body;

[0036] 7. Rolling element. Detailed Implementation

[0037] The above solution will be further described below with reference to specific embodiments. It should be understood that these embodiments are for illustrating the present invention and are not intended to limit the scope of the present invention. The implementation conditions used in the embodiments can be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are usually the conditions in conventional experiments.

[0038] like Figure 1 As shown in the figure, this is an embodiment of the present invention, which provides a novel steering column bearing, including an outer sleeve 1, an inner ring 2 disposed on the inner side of the outer sleeve 1, an elastic component disposed between the outer ring assembly and the outer sleeve 1, and a plurality of rolling elements 7 disposed between the outer ring assembly and the inner ring, wherein the outer sleeve 1 is made of low carbon steel material by stamping process, and the rolling elements 7 are steel balls.

[0039] like Figure 2 and Figure 3As shown, the side wall of the inner ring 2 is wavy, a first groove 2-1 is formed in the middle of the outer wall of the inner ring 2, and two second grooves 2-2 are arranged on both sides of the first groove 2-1, the first groove 2-1 and the second groove 2-2 both extend along the circumference of the inner ring 2, and a raceway matched with the rolling body 7 is formed between the first groove 2-1 and the outer ring assembly. The inner ring 2 is made of low carbon steel, and the first groove 2-1 and the second groove 2-2 are formed on the inner ring 2 through stamping, rolling and heat treatment processes, and the longitudinal section of the first groove 2-1 is trapezoidal.

[0040] A regular polygon wall surface 2-3 is arranged on the inner wall of the inner ring 2 corresponding to the second groove 2-2, and a plurality of protrusions 2-4 are arranged on the regular polygon wall surface 2-3 in the circumferential direction of the inner ring 2, the number of sides of the regular polygon ranges from 12 to 20, and the diameter of the steering input shaft is generally in the middle of the diameter of the circumscribed circle and the diameter of the inscribed circle of the regular polygon. In this example, the regular polygon wall surface 2-3 is a regular hexadecagon, the protrusion structure is formed on the regular polygon wall surface 2-3 through deep drawing process, the protrusion 2-4 is ellipsoidal and the height is 0.2-0.3mm. The structure of the regular polygon wall surface 2-3 can reduce the machining precision of the outer diameter of the steering input shaft and avoid cracking of the inner ring 2. During assembly, the steering input shaft is grabbed and assembled into the inner ring 2 by using the clamping jaw matched with the clamping groove on the steering input shaft. When the clamping jaw contacts the protrusion structure, the assembly is stopped. The protrusion structure can guide the assembly of the steering input shaft and also can be positioned by the clamping jaw.

[0041] The outer ring assembly includes a first outer ring 3 and a second outer ring 4 arranged symmetrically on both sides of the rolling body 7, and the elastic assembly includes a first elastic body 5 arranged between the first outer ring 3 and the outer sleeve 1 and a second elastic body 6 arranged between the second outer ring 4 and the outer sleeve 1. Preferably, the first outer ring 3 and the second outer ring 4 are stamped from low carbon steel material, and the first elastic member 5 and the second elastic member 6 are O-shaped rubber rings. The elastic assembly can provide a certain pre-tightening force in the bearing through compression or rebound. When the steering column assembly is misaligned up and down (for example, there is an a angle deviation between the steering column axis and the bearing seat), the bearing can be slightly deviated during assembly, so that the entire bearing has a certain aligning ability, avoids local stress concentration and abnormal wear caused by installation error or stress deformation, and also can adapt to the slight deformation of the bearing seat during vehicle driving, avoiding bearing jamming or abnormal noise. Figure 5

[0042] The raceway surface of the first outer ring 3 and the second outer ring 4 matched with the rolling body 7 is a conical surface, and specifically, Figure 4 ​As shown, the first outer ring 3 comprises a first ring body 3-1, a raceway portion 3-2 and a second ring body 3-3 connected in sequence, the outer diameter of the second ring body 3-3 is greater than that of the first ring body 3-1, the raceway portion 3-2 is gradually expanded from the first ring body 3-1 to the second ring body 3-3, the second outer ring 4 has the same structure as the first outer ring 3, so that the raceway formed between the first outer ring 3, the second outer ring 4 and the inner ring 2 is a double-V structure arranged in an up-down manner, which can better realize low friction during the operation of the rolling body 7, and the bearing is designed as a four-point contact ball bearing, which can simultaneously bear bidirectional load, and has low friction and high rigidity performance.

[0043] In order to improve the stability of the structure, a limiting groove cooperating with the first elastic body 5 / second elastic body 6 is formed between the first ring body 3-1 and the second ring body 3-2, and the limiting groove is located on the outer wall of the raceway portion 3-2.

[0044] In summary, the bearing is convenient to assemble, improves the assembly efficiency, reduces the requirement for the machining precision of the outer diameter of the steering input shaft, and reduces the problem of inner ring cracking.

[0045] The above examples are only for illustrating the technical concept and characteristics of the present application, the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent transformation or modification according to the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. A novel steering column bearing, comprising an outer sleeve, an outer ring assembly arranged inside the outer sleeve in a circumferential direction, an inner ring arranged inside the outer ring assembly in the circumferential direction, an elastic assembly arranged between the outer ring assembly and the outer sleeve, and a plurality of rolling elements arranged between the outer ring assembly and the inner ring, characterized in that: a side wall of the inner ring is wavy, a first groove is formed in a middle portion of an outer wall of the inner ring, and two second grooves are arranged on both sides of the first groove, the first groove and the second grooves extend in the circumferential direction of the inner ring, and a raceway for cooperating with the rolling elements is formed between the first groove and the outer ring assembly; a regular polygonal wall surface is arranged on a portion of an inner wall of the inner ring corresponding to the second grooves, and a plurality of protrusions are arranged on the regular polygonal wall surface in the circumferential direction of the inner ring. The longitudinal section of the first groove is trapezoidal. The outer ring assembly comprises a first outer ring and a second outer ring symmetrically arranged on both sides of the rolling elements, and the elastic assembly comprises a first elastic body arranged between the first outer ring and the outer sleeve and a second elastic body arranged between the second outer ring and the outer sleeve.

2. The new steering column bearing according to claim 1, characterized in that: The raceway surface of the first outer ring and the second outer ring cooperating with the rolling elements is a conical surface.

3. The new steering column bearing of claim 2, wherein: The first outer ring comprises a first ring body, a raceway portion and a second ring body connected in sequence, the outer diameter of the second ring body is greater than that of the first ring body, and the raceway portion is gradually expanded from the first ring body to the second ring body.

4. The new steering column bearing of claim 3, wherein: The second outer ring has the same structure as the first outer ring.

5. The new steering column bearing of claim 4, wherein: A limiting groove for cooperating with the first / second elastic body is formed between the first ring body and the second ring body. The first / second elastic body is an O-shaped rubber ring.

6. The new steering column bearing of claim 5, wherein: The protrusions are ellipsoidal.

7. The new steering column bearing of claim 3, wherein: The height of the protrusions is 0.2-0.3 mm.

8. The new steering column bearing of claim 1, wherein: The number of sides of the regular polygon is 12-20.

9. The new steering column bearing of claim 8, wherein: ​ 10. The new steering column bearing of claim 1, wherein: ​

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