CN203214627U

CN203214627U - Centripetal bearing

Info

Publication number: CN203214627U
Application number: CN 201320188026
Authority: CN
Inventors: 胡旭辉
Original assignee: NINGBO SUNTHAI BEARING CO Ltd
Current assignee: NINGBO SUNTHAI BEARING CO Ltd
Priority date: 2013-04-15
Filing date: 2013-04-15
Publication date: 2013-09-25
Anticipated expiration: 2023-04-15

Abstract

The utility model discloses a centripetal bearing. The centripetal bearing comprises an outer ring, an inner ring and a rolling body, wherein a ring-shaped concave cavity is arranged on the inner peripheral surface of the outer ring; a ring-shaped concave cavity is arranged on the outer peripheral surface of the inner ring; the outer part of the rolling body is contacted with two points of the ring-shaped concave cavity in a supporting manner; a grease collecting groove cavity is formed between the rolling body and the ring-shaped concave cavity; the inner part of the rolling body are contacted with the two points of the ring-shaped concave cavity in a supporting manner; a grease collecting groove channel is formed between the rolling body and the ring-shaped concave cavity. The centripetal bearing disclosed by the utility model has the advantages that the production cost is low, the efficiency is high, two-point contact is adopted, and the contact surface is small, so that the friction force in rotation is reduced, the ring-shaped concave cavities and the section shapes of the ring-shaped concave cavities on the inner ring and the outer ring of the bearing of the existing bearing are changed, the stressing condition of the rolling body is optimized, the problem of overlarge centrifugal force of the rolling body when the rotating speed of the existing bearing is overcome, the storage of lubricating oil or collection of grease is convenient, the lubricating condition of the rolling body is effectively improved and the service life is greatly prolonged.

Description

Radial bearing

Technical field

The utility model relates to a kind of bearing manufacture technology field, specifically refers to a kind of radial bearing.

Background technique

Existing a kind of application number is CN201120155375.7, the Chinese utility model patent that name is called " a kind of radial ball bearing " discloses a kind of structure, comprise inner ring, described inner ring arranged outside has the outer ring, be provided with steel ball between inner ring and the outer ring, the contacting part of described steel ball and inner ring, outer ring is provided with oil groove, also is provided with the oil hole that is connected with described oil groove on the described outer ring.This model utility oil groove makes the loss of lubricant oil reduce, and reduces production costs high lubricating effect; And make-up oil is convenient, does not need arrestment, does not influence production.Yet this structural bearing capacity is poor, thereby contact stress has increased the possibility that bearing fatigue peels off when load increases, and simultaneously because contact stress increases the heating that causes bearing, causes reduce the working life of bearing.Therefore, be necessary the structure characteristic of this kind radial ball bearing is done further to improve.

The model utility content

Technical problem to be solved in the utility model be provide at above-mentioned prior art present situation a kind of frictional force little, rotate flexibly and the effective radial bearing of lubricated collection fat.

The utility model solves the problems of the technologies described above the technological scheme that adopts: the radial bearing of present embodiment, include the outer ring, inner ring and rolling element, described rolling physical efficiency rollably places between outer ring and the inner ring, it is characterized in that: the inner peripheral surface of described outer ring is provided with annular cavity, described inner ring outer circumferential face is provided with annular cavity, the outside of described rolling element is supported on 2 contacts of annular cavity, and between described rolling element and described annular cavity, be formed with collection fat ditch chamber, the inside of described rolling element is supported on 2 contacts of annular cavity, and between described rolling element and described annular cavity, be formed with collection fat raceway groove, be subjected at bearing under the prerequisite of certain load, the contact stress of bearing steel ball is touched a little to be shared, and the contact stress of each contact position reduces.

As improvement, angle between two inwalls in described annular cavity cross section is between 60 °～135 °, angle between two inwalls of described annular cavity cross section is between 60 °～135 °, improves bearing fretting wear and heating value in high speed operation, improves the working life of bearing.

Improve, the shape triangle that forms between described annular cavity cross section and the level or trapezoidal is convenient to better collect fat again, and prevents from leaking.

Improve, what form between described annular cavity cross section and the level is shaped as triangle or trapezoidal again.

Improve, when the sectional shape of described annular cavity was triangle, leg-of-mutton annular cavity top was circular arc again, and the circular arc transition is reasonable, improved collection fat structure.

Improve, when the sectional shape of described annular cavity was triangle, the cavity top of triangle annular was circular arc again.

Improve, described rolling element is arranged in the retainer again, and described retainer can be arranged between outer ring and the inner ring versatilely, correspondingly improves the stability of ball, is difficult for taking place ball bearing and " kills " phenomenon.

Compared with prior art, advantage of the present utility model is: described radial bearing cost of production is low, the efficient height, rolling element and annular cavity, 2 contacts of annular cavity, surface of contact is little, reduced the frictional force when rotating, and by suppressing the increase of the friction torque in the running under the preload effect, thereby suppress heat production and the wearing and tearing of bearing, simultaneously, annular cavity that existing bearing inner race and outer ring be provided with and the sectional shape of annular cavity have been changed, optimize the force-bearing situation of rolling element, overcome existing bearing when rotating speed is too high, the problem that the centrifugal force of rolling element is excessive, and be convenient to store lubricant oil or collection fat, be conducive to improve the lubricating condition of rolling element or reduce friction, improved the working life of this radial bearing greatly.

Description of drawings

Fig. 1 is the utility model embodiment's stereogram;

Fig. 2 is the plan view of Fig. 1;

Fig. 3 is along the sectional view of A-A line among Fig. 2;

Fig. 4 is the exploded view of Fig. 1;

Fig. 5 is another embodiment's of the utility model stereogram;

Fig. 6 is the plan view of Fig. 5;

Fig. 7 is along the sectional view of B-B line among Fig. 6;

Fig. 8 is the exploded view of Fig. 5.

Embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

Shown in Fig. 1 to 8, the radial bearing of present embodiment, include outer ring 2, inner ring 1 and rolling element 3, described rolling element 3 can rollably place between outer ring 2 and the inner ring 1, it is characterized in that: the inner peripheral surface of described outer ring 2 is provided with annular cavity, described inner ring 1 outer circumferential face is provided with annular cavity, the outside of described rolling element 3 is supported on 2 contacts of annular cavity, and between described rolling element 3 and described annular cavity, be formed with collection fat ditch chamber, the inside of described rolling element 3 is supported on 2 contacts of annular cavity, and is formed with collection fat raceway groove between described rolling element 3 and described annular cavity.

Angle a between two inwalls in described annular cavity cross section is between 60 °～135 °, and preferred 90 °, the angle b between two inwalls of described annular cavity cross section is between 60 °～135 °, preferred 90 °.The shape that forms between described annular cavity cross section and the level is preferably triangle or trapezoidal, and the shape that forms between described annular cavity cross section and the level is preferably triangle or trapezoidal.Wherein, when the sectional shape of described annular cavity was triangle, leg-of-mutton annular cavity top was preferably the transition of circular arc, and when the sectional shape of described annular cavity was triangle, the cavity top of triangle annular was preferably the transition of circular arc.Described rolling element 3 can be arranged in the retainer 4, and described retainer 4 can be arranged between outer ring and the inner ring versatilely.Bearing cap 5 preferably is set.

Enforcement principle of the present utility model: by to the force analysis of rolling element as can be known, this bearing is when being subjected to equal load, the radial force that each point of contact of rolling element is subjected to is all less than the suffered radial force of rolling element in the existing ball bearing, this bearing can also bear axial force, simultaneously because the raceway groove that between rolling element and ring raceway, has, be convenient to store lubricant oil or collection fat, be conducive to improve the lubricating condition of rolling element or reduce friction, thus the working life that can improve bearing.

Claims

1. radial bearing, include outer ring (2), inner ring (1) and rolling element (3), described rolling element (3) can rollably place between outer ring (2) and the inner ring (1), it is characterized in that: the inner peripheral surface of described outer ring (2) is provided with annular cavity, described inner ring (1) outer circumferential face is provided with annular cavity, the outside of described rolling element (3) is supported on 2 contacts of annular cavity, and between described rolling element (3) and described annular cavity, be formed with collection fat ditch chamber, the inside of described rolling element (3) is supported on 2 contacts of annular cavity, and is formed with collection fat raceway groove between described rolling element (3) and described annular cavity.

2. radial bearing according to claim 1, it is characterized in that: the angle (a) between two inwalls in described annular cavity cross section is between 60 °～135 °, the angle (b) between two inwalls of described annular cavity cross section is between 60 °～135 °.

3. radial bearing according to claim 2 is characterized in that: the shape triangle that forms between described annular cavity cross section and the level or trapezoidal.

4. radial bearing according to claim 2 is characterized in that: what form between described annular cavity cross section and the level is shaped as triangle or trapezoidal.

5. radial bearing according to claim 3, it is characterized in that: when the sectional shape of described annular cavity was triangle, leg-of-mutton annular cavity top was circular arc.

6. radial bearing according to claim 4, it is characterized in that: when the sectional shape of described annular cavity was triangle, the cavity top of triangle annular was circular arc.

7. according to arbitrary described radial bearing in the claim 1 to 6, it is characterized in that: described rolling element (3) is arranged in the retainer (4), and described retainer (4) can be arranged between outer ring (2) and the inner ring (1) versatilely.