CN203784096U

CN203784096U - Joint bearing

Info

Publication number: CN203784096U
Application number: CN201420174418.XU
Authority: CN
Inventors: 许明超
Original assignee: Xinchang Ming Rui Joint Shaft Bearing Co Ltd
Current assignee: Xinchang Ming Rui Joint Shaft Bearing Co Ltd
Priority date: 2014-04-11
Filing date: 2014-04-11
Publication date: 2014-08-20
Anticipated expiration: 2024-04-11

Abstract

The utility model relates to a joint bearing and belongs to the technical field of bearings. The joint bearing comprises an outer ring and inner ring and is characterized in that ball grooves are uniformly formed in the concave cambered surface of the outer ring, and a group of small balls are arranged in each ball groove; a hollow ball is arranged in each small ball and is matched with the small ball in a rolling manner, and the convex cambered surface of the inner ring is touched and matched with the hollow ball in a rolling manner; the spherical surface of each hollow ball is coated with a teflon layer A, and the convex cambered surface of the inner ring is coated with a teflon layer B. According to the joint bearing, the inner ring and the outer ring are in rolling friction, and the surfaces of the hollow balls and the inner ring are provided with the teflon layers, so that the friction of the bearing is greatly reduced, abrasion is less, and the bearing can bear relatively-high rotating speed; the hollow balls are matched with the small balls in the grooves in a rolling manner, so that the universal rolling of the hollow balls is realized; each ball adopts a hollow structure, is light in mass and small in heat capacity, is not likely to generate a seizure phenomenon, and has a good rolling effect; the joint bearing has the advantages of automatic aligning, high bearing capacity, stable performance and long service life and the like.

Description

A kind of joint shaft bearing

Technical field

The utility model belongs to technical field of bearings, is specially a kind of joint shaft bearing.

Background technique

Existing joint shaft bearing is mainly the sliding bearing that is had the outer ring special construction of inner ball surface by an inner ring that has an outer spherical surface and, can bear larger load.Because the spherical sliding contact area of joint shaft bearing is large, the frictional force of its inner ring and outer ring is larger, easily damages; And also there is the problems such as tilt angle is large, and edge stress is large, affected performance and used life.Existing angular contact articulated bearing directly arranges polytetrafluoroethylene floor on the internal surface of outer ring, and polytetrafluoroethylene floor contacts with the outer surface of inner ring, and its area of contact is large, and frictional force is relatively large, easily wearing and tearing; And the thickness to polytetrafluoroethylene floor does not have concrete regulation, when production, do not have the specific process parameter can reference, the too thick cost that increases, the too thin technological requirement that can not meet bearing.Existing ball is all solid construction, exists quality large, and thermal capacity is large, easily occurs the shortcoming of killing when rolling.

Model utility content

For the above-mentioned problems in the prior art, the purpose of this utility model is that design provides a kind of technological scheme of joint shaft bearing, and the friction factor of this bearing is little, wear-resistant, can bear larger rotating speed; Hollow ball rolls and coordinates with the little ball in groove, realizes the universal rolling of hollow ball, and ball is hollow-core construction, and quality is little, and thermal capacity is little, is not prone to and kills phenomenon; Also there is the advantages such as self-aligning, bearing capacity are high, selflubricating, its stable performance, long service life.

Described a kind of joint shaft bearing, comprise an outer ring that has concave arc surface, one has the inner ring of convex globoidal, it is characterized in that the uniform ball groove that arranges on the concave arc surface of outer ring, one group of little ball is set in each ball groove, the hollow ball coordinating with its rolling is set in little ball, the convex globoidal of inner ring touches to roll with hollow ball and coordinates, the sphere of hollow ball applies polytetrafluoroethylene floor A is set, and the convex globoidal of inner ring applies polytetrafluoroethylene floor B is set.

Described a kind of joint shaft bearing, is characterized in that the large end face of inner ring exceeds outer ring large end face 2-5cm.

Described a kind of joint shaft bearing, is characterized in that the annular port two ends inner edge of inner ring arranges circular arc chamfering, and the angle of circular arc chamfering is 10-15 degree.

Described a kind of joint shaft bearing, is characterized in that the thickness of described polytetrafluoroethylene floor A is 0.5-1.5mm.

Described a kind of joint shaft bearing, is characterized in that the thickness of described polytetrafluoroethylene floor B is 1-2mm.

Above-mentioned a kind of joint shaft bearing, it is simple and reasonable for structure, relatively rotating as rolling friction between inner ring, outer ring, and be all provided with polytetrafluoroethylene floor in hollow ball, inner peripheral surface, polytetrafluoroethylene floor has the characteristic of low friction, high abrasion and selflubricating, the friction of this bearing is reduced greatly, wear and tear less, can bear larger rotating speed; Hollow ball rolls and coordinates with the little ball in groove, realizes the universal rolling of hollow ball, and ball is hollow-core construction, and quality is little, and thermal capacity is little, is not prone to and kills phenomenon, and rolling effect is good; Also there is self-aligning, bearing capacity advantages of higher, its stable performance, long service life.

Brief description of the drawings

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

Fig. 2 is the structural representation that hollow ball is set on outer ring;

In figure: 1-outer ring, 2-ball groove, the hollow ball of 3-, 3a-polytetrafluoroethylene floor A, 4-inner ring, 4a-polytetrafluoroethylene floor B, the little ball of 5-.

Embodiment

Below in conjunction with Figure of description, the utility model is described in further detail.

As shown in the figure, this self-lubricating knuckle bearing comprises an outer ring 1 that has concave arc surface, one has the inner ring 4 of convex globoidal, the uniform ball groove 2 that arranges on the concave arc surface of outer ring 1, each ball groove 2 is interior arranges one group little ball 5, the hollow ball 3 that the interior setting of little ball 5 coordinates with its rolling, and the convex globoidal of inner ring 4 touches to roll with hollow ball 3 and coordinates, the sphere of hollow ball 3 applies polytetrafluoroethylene floor A3a is set, and the convex globoidal of inner ring 4 applies polytetrafluoroethylene floor B4a is set.The large end face of inner ring 4 exceeds outer ring 1 large end face 2-5cm, and outer ring 1 is wrapped in inner ring 4 outsides, and outer ring 1, inner ring 4 concave-convex cambered surfaces coordinate, and have self-aligning, bearing capacity advantages of higher.The annular port two ends inner edge of inner ring 4 arranges circular arc chamfering, and the angle of circular arc chamfering is 10-15 degree; Solved cylindrical bearing due to excessive the brought series of problems of edge stress, the angle of circular arc chamfering be 10-15 while spending its edge stress less.The thickness of described polytetrafluoroethylene floor A3a is 0.5-1.5mm, and the thickness of polytetrafluoroethylene floor B4a is 1-2mm, and the coating thickness of teflon is reasonable, can meet bearing technological requirement, has reduced again cost of production.Hollow ball 3 rolls and coordinates with the little ball 5 in groove, realizes the universal rolling of hollow ball 3, and ball is hollow-core construction, and quality is little, and thermal capacity is little, is not prone to and kills phenomenon.

Relatively rotating as rolling friction between the inner ring 4 of this bearing, outer ring 1, and be all provided with polytetrafluoroethylene floor on hollow ball 3, inner ring 4 surfaces, polytetrafluoroethylene floor has the characteristic of low friction, high abrasion and selflubricating, the friction of this bearing is reduced greatly, wear and tear less, can bear larger rotating speed; Also there is self-aligning, bearing capacity advantages of higher, its stable performance, long service life.

Claims

1. a joint shaft bearing, comprise an outer ring (1) that has concave arc surface, one has the inner ring (4) of convex globoidal, it is characterized in that the uniform one group of ball groove (2) that arranges on the concave arc surface of outer ring (1), one group of little ball (5) is set in each ball groove (2), the hollow ball (3) coordinating with its rolling is set in little ball (5), the convex globoidal of inner ring (4) touches to roll with hollow ball (3) and coordinates, the sphere of hollow ball (3) applies polytetrafluoroethylene floor A(3a is set), the convex globoidal of inner ring (4) applies polytetrafluoroethylene floor B(4a is set).

2. a kind of joint shaft bearing as claimed in claim 1, is characterized in that the large end face of inner ring (4) exceeds outer ring (1) large end face 2-5cm.

3. a kind of joint shaft bearing as claimed in claim 1, is characterized in that the annular port two ends inner edge of inner ring (4) arranges circular arc chamfering, and the angle of circular arc chamfering is 10-15 degree.

4. a kind of joint shaft bearing as claimed in claim 1, is characterized in that described polytetrafluoroethylene floor A(3a) thickness be 0.5-1.5mm.

5. a kind of joint shaft bearing as claimed in claim 1, is characterized in that described polytetrafluoroethylene floor B(4a) thickness be 1-2mm.