CN214331192U

CN214331192U - Cylindrical roller bearing

Info

Publication number: CN214331192U
Application number: CN202022867397.8U
Authority: CN
Inventors: 李旭; 郭平; 游利军
Original assignee: XIANGYANG AUTOMOBILE BEARING CO LTD
Current assignee: XIANGYANG AUTOMOBILE BEARING CO LTD
Priority date: 2020-12-04
Filing date: 2020-12-04
Publication date: 2021-10-01
Anticipated expiration: 2030-12-04

Abstract

The utility model discloses a name is a cylindrical roller bearing. Belongs to the technical field of rolling bearings. The cylindrical roller bearing mainly solves the problems that the friction coefficient of the existing cylindrical roller bearing is high and the high rotating speed cannot be realized. It is mainly characterized in that: the cylindrical roller bearing comprises an outer ring, an inner ring, a cylindrical roller and a retainer; and the flanges of the outer ring or/and the inner ring are inclined flanges with angles. The utility model has the characteristics of simple structure, reduce the contact area of inner circle or/and outer lane and cylindrical roller terminal surface, reduce bearing coefficient of friction and make the bearing possess the high speed, mainly used car electricity drives the rotor shaft and the input shaft support of system.

Description

Cylindrical roller bearing

Technical Field

The utility model belongs to the technical field of antifriction bearing, concretely relates to possess low friction, can deal with cylindrical roller bearing of high-speed operating mode for rotor shaft or input shaft in the car electric drive assembly.

Background

At present, a rotor shaft or an input shaft in an automobile electric drive assembly requires a bearing to have low friction, high speed and certain bearing capacity, a ball bearing structure is mostly used in the market, and a small amount of cylindrical roller structures are used. The cylindrical roller bearing has N, NU, NUP, NJ and NF structures.

The conventional cylindrical roller bearing existing on the market is composed of an outer ring 1-01, an inner ring 1-02, cylindrical rollers 1-04 and a retainer 1-46, and the structure is shown in figures 1 and 2. Wherein, the flanges of the outer ring 1-01 and the inner ring 1-02 are plane structures, and the end surface of the cylindrical roller 1-04 is a plane structure. The flanges of the bearing inner ring 1-02 or the outer ring 1-01 are in surface contact with the end faces of the cylindrical rollers 1-04, so that the contact area is large, the friction coefficient is high, the heat productivity is large, and the bearing can be ablated and the like to fail in early stages under a high-speed working condition.

Disclosure of Invention

The utility model aims at providing a can reduce the contact area of inner circle or outer lane and cylindrical roller terminal surface, reduce the bearing coefficient of friction and give out heat little cylindrical roller bearing to the condition that above-mentioned cylindrical roller bearing inner circle and outer lane flange and cylindrical roller terminal surface are face contact.

The technical solution of the utility model is that: a cylindrical roller bearing comprising a cylindrical roller bearing constituted by an outer ring, an inner ring, a cylindrical roller and a retainer, characterized in that: and the flanges of the outer ring or/and the inner ring are inclined flanges with angles.

The technical solution of the utility model is that the inclined flanges of the outer ring or/and the inner ring are one or two.

The technical solution of the utility model in the angle that oblique flange of outer lane or inner circle taken be 0 ~ 2.

The technical solution of the utility model is that the end face of the cylindrical roller is a circular arc face.

The technical solution of the utility model is that the arc surface is an arc surface with concave inner part and concave outer part at the middle part of the end surface.

The technical solution of the utility model in the internal diameter of cylindrical roller bearing be 17~100 mm.

The utility model discloses following positive effect has:

the utility model discloses an optimize the contact pair, reduce the contact area of inner circle or outer lane and cylindrical roller terminal surface, reduce bearing coefficient of friction, calorific capacity is little, makes the bearing possess low friction nature and high speed nature for car electric drive system rotor shaft and input shaft department bearing selection scope are broader. The bearing capacity of the cylindrical roller bearing with the same size is much higher than that of a ball bearing, so that the cylindrical roller bearing with high-speed performance can well solve the problems of high bearing requirement and limited space. The high-speed cylindrical roller bearing with smaller size replaces a ball bearing with larger size, and the miniaturization, the light weight and the high efficiency of the automobile electric driving system can be realized.

The utility model discloses mainly used car electricity drives rotor shaft and the input shaft support of system.

Drawings

Fig. 1 is a general structural schematic diagram of a bearing of this type.

Fig. 2 is a partially enlarged view of fig. 1.

Fig. 3 is a schematic view of the overall structure of the present invention.

Fig. 4 is a partially enlarged view of fig. 3.

Fig. 5 is an enlarged view of a portion of fig. 4.

Fig. 6 is a partially enlarged view of fig. 4.

In the figure: 1-01. outer ring; 1-02. inner ring; 1-04, cylindrical roller; 1-46. a retainer; 2-01. outer ring; 2-02, inner ring; 2-04, cylindrical roller; 2-46, a retainer.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 3-6. The utility model relates to an embodiment of cylindrical roller bearing, including outer lane 2-01, inner circle 2-02, cylindrical roller 2-04 and keep ware 2-46. The retainer 2-46 is the same as the retainer in the prior art, except that the flange of the bearing outer ring 2-01 is an inclined flange with an angle alpha, the flange of the bearing inner ring 2-02 is an inclined flange with an angle alpha, and the end surface of the cylindrical roller 2-04 is in an arc structure. The inner diameter of the cylindrical roller bearing is 17-100 mm.

The number of the inclined flanges of the outer ring 2-01 is two. The angle alpha of the inclined flange of the outer ring 2-01 is 0-2 degrees. The number of the inclined flanges of the outer ring 2-01 can be one.

The number of the inclined flanges of the inner ring 2-02 is two. The angle alpha of the inclined flanges of the inner rings 2-02 is 0-2 degrees. The inner ring 2-02 can also have one inclined flange.

The end surface of the cylindrical roller 2-04 is a circular arc surface. The number of the arc surfaces of the cylindrical rollers 2-04 is two. Each arc surface is an arc surface with the end surface being internally concave R2 at the middle part and externally concave R1 at the periphery. The circular arc surfaces of the cylindrical rollers 2-04 can also be one.

The bearing inner ring and the bearing outer ring are adjusted to be the inclined flanges with angles, the end faces of the cylindrical rollers are adjusted to be the arc-shaped end faces, the bearing inner ring or the outer ring flange and the end faces of the cylindrical rollers are changed into line contact from surface contact, the contact area between the bearing inner ring and the cylindrical rollers and the contact area between the bearing outer ring flange and the end faces of the cylindrical rollers are greatly reduced, the friction coefficient is also greatly reduced, the heat productivity of the bearing in the operation process is reduced, and the high-speed performance of the cylindrical roller bearing is improved.

Claims

1. A cylindrical roller bearing comprising a cylindrical roller bearing constituted by an outer ring (2-01), an inner ring (2-02), cylindrical rollers (2-04), and a retainer (2-46), characterized in that: the flanges of the outer ring (2-01) or/and the inner ring (2-02) are oblique flanges with an angle (alpha).

2. The cylindrical roller bearing according to claim 1, wherein: one or two inclined flanges of the outer ring (2-01) or/and the inner ring (2-02) are/is provided.

3. The cylindrical roller bearing according to claim 1 or 2, characterized in that: the angle (alpha) of the inclined flanges of the outer ring (2-01) or/and the inner ring (2-02) is 0-2 degrees.

4. The cylindrical roller bearing according to claim 1 or 2, characterized in that: the end surface of the cylindrical roller (2-04) is a circular arc surface.

5. The cylindrical roller bearing according to claim 3, wherein: the end surface of the cylindrical roller (2-04) is a circular arc surface.

6. The cylindrical roller bearing according to claim 4, wherein: the arc surface is an arc surface with an end surface with a middle part being concave (R2) and a periphery being concave (R1).

7. The cylindrical roller bearing according to claim 5, wherein: the arc surface is an arc surface with an end surface with a middle part being concave (R2) and a periphery being concave (R1).

8. The cylindrical roller bearing according to claim 1 or 2, characterized in that: the inner diameter of the cylindrical roller bearing is 17-100 mm.

9. The cylindrical roller bearing according to claim 3, wherein: the inner diameter of the cylindrical roller bearing is 17-100 mm.

10. Cylindrical roller bearing according to claim 5, 6 or 7, characterized in that: the inner diameter of the cylindrical roller bearing is 17-100 mm.