CN202690748U

CN202690748U - Ball bearing capable of largely displacing along axial direction

Info

Publication number: CN202690748U
Application number: CN 201220279566
Authority: CN
Inventors: 高峰
Original assignee: WUXI HAIHONG FINE MACHINERY MANUFACTURING Co Ltd
Current assignee: WUXI HAIHONG FINE MACHINERY MANUFACTURING Co Ltd
Priority date: 2012-06-14
Filing date: 2012-06-14
Publication date: 2013-01-23
Anticipated expiration: 2022-06-14

Abstract

The utility model discloses a ball bearing capable of largely displacing along axial direction. The ball bearing comprises inner rings, outer rings, steel balls, rolling paths and retaining frames, wherein the steel balls and the retaining frames are arranged between the inner rings and the outer rings; the rolling paths are arranged on the inner rings; the rolling paths are arc-shaped and have large curvatures; and the diameters of the arcs of the rolling paths are 38-58cm. According to the ball bearing, by the arrangement of the rolling paths with large curvatures on the inner rings of the bearing, the relative axial displacement of the inner and outer rings of the bearing is largely increased, and radial backflash reaches requirements of customers, so that after the bearing is installed on a shaft, the ball bearing is helpful to compensating the change caused by thermal expansion and cold shrinkage due to the temperature, and also helpful for compensating the change caused by geometric dimension difference of the components and plastic seats of customers.

Description

The axial ball bearing of large displacement

Technical field

The utility model relates to a kind of ball bearing.Especially a kind of ball bearing of axially large displacement.Can be applicable to the mechanical position of large axial displacement, adapting to the large axial displacement between the mechanical part, thereby remedy the general ball bearing effect that is beyond one's reach.

Background technique

Bearing is to work the parts of fixing and reducing the load friction factor in mechanical transmission course as a kind of standard piece.Also can say, when other parts produce relative movement each other on axle, be used for reducing the fixing parts of friction factor and retainer shaft central position in the power transmission process.Its major function is the supported mechanical solid of rotation, in order to the mechanical load friction factor of reduction equipment in transmission process.

But the user can be extended to the function of bearing for the restriction in demand, mechanism or the space of function, proposes some special demands, to satisfy the needs of its design.This bearing is exactly design generation under the prerequisite of client's proposition " needing head and shoulders above, the axial internal clearance of conventional ball bearing requires and very large adjusting center performance ".

Such as the bearing aperture d=5mm of market demand, require bearing axial displacement to reach more than the 1mm, but radial internal clearance must not surpass 0.035mm, bearing must have the adjusting center function more than 1 ° simultaneously.Thereby reach after bearing is contained on the axle, the variation that the rising-heat contracting-cold that helps compensation to cause owing to temperature causes, and can also help to compensate because the variation that assembly and client's plastics stand geometrical dimension tolerances cause; Because whole assembly in use, is not to be in the central position, can produce small deflection always, therefore reach the function of aligning.

Summary of the invention

The purpose of this utility model is, proposed a kind of ball bearing of axially large displacement, and to axial displacement, the radial internal clearance of bearing enclose all reach demand.Overcome existing ball bearing according to the design of routine, the ratio of its radial internal clearance and axial internal clearance reaches 1:8 – about 10, the problem that can't meet customer need,

In order to solve the problems of the technologies described above, the technological scheme that the utility model adopts is: a kind of axially large displacement ball bearing, it is characterized in that comprising inner ring, outer ring, steel ball, raceway, retainer, steel ball, retainer place between inner ring and the outer ring, raceway places on the inner ring, raceway is the arc raceway of deep camber, and the diameter of this raceway circular arc is 38-58cm.Further, be equipped with dust cover on the outer ring.

Therefore, the to axial displacement of Internal and external cycle reaches more than the 1mm, and radial internal clearance is no more than 0.035mm, have simultaneously 1 ° with the adjusting center function.

From a structural point, satisfy client's specific (special) requirements, the most direct method is to reach with the mode of the moulding raceway of special multi-section type the axially purpose of large play, and special raceway can be on the inner ring or on the outer ring, also can be simultaneously on Internal and external cycle.

If special raceway design is on the outer ring, because steel ball carries out axial slip at raceway, can cause the assembly of bearing inside to hit the dust cover of bearing self, just dust cover can not be installed on the bearing like this, bearing does not just reach good dust-proof effect, must the client add voluntarily dustproof facilities, can greatly increase client's cost and the volume of mechanism.

Same problem also can appear at special raceway and design simultaneously on the Internal and external cycle raceway.

Therefore from designing, best mode can only be with special raceway design on inner ring, and can place dust cover in the outer ring like this increases dust-proof effect.

If but with the mode of multi-section type, must process with the mode of form grinding, but not having special process equipment after the grinding is the surface roughness that is difficult to improve by the grinding of raceway bearing race, and the flexibility that yet just can't improve bearing does not reach client's demand so equally.

The beneficial effects of the utility model are: by design the raceway of deep camber at bearing inner race, so that the to axial displacement of bearing enclose increases greatly, and radial internal clearance has reached the standard of customer requirement, after thereby bearing is contained on the axle, the variation that the rising-heat contracting-cold that not only helps compensation to cause owing to temperature causes, and can also help to compensate because the variation that assembly and client's plastics stand geometrical dimension tolerances cause; Because whole assembly in use, is not to be in the central position, can produce small deflection always, therefore reach the function of aligning.

Description of drawings

Fig. 1 is a kind of axially design diagram of large displacement ball bearing of the utility model.

Among the figure: outer ring 1, inner ring 2, special raceway 3, steel ball 4, retainer 5.

Embodiment

Below with reference to drawings and Examples, the utility model is described in detail.

Consider flexibility and the workability of product in course of working in the product use, the specific bearing of embodiment such as Fig. 1.Design the arc raceway of especially big curvature at the inner ring of ball bearing, steel ball is placed between inner ring and the outer ring, steel ball is done in orbit and is endwisely slipped, dust cover is installed on the outer ring, can make like this ball bearing have very large axial internal clearance, and can be controlled at certain limit to radial internal clearance, because dust cover is installed on the outer ring, bearing has good dust-proof effect simultaneously.Because whole assembly in use, is not to be in the central position, can produce small deflection always, therefore reach the function of aligning.

1, just can reach the requirement of grinding deep camber raceway by improving grinding wheel dresser on original process equipment, can utilize the existing process equipment of general bearing processing factory fully.

2, can utilize existing grinding equipment that raceway is ground, thereby reach the purpose that improves the raceway roughness.

3, the production of the processing of other operations and conventional bearing is consistent.

Claims

1. axial large displacement ball bearing, it is characterized in that comprising inner ring, outer ring, steel ball, raceway, retainer, steel ball, retainer place between inner ring and the outer ring, and raceway places on the inner ring, raceway is the arc raceway of deep camber, and the diameter of described raceway circular arc is 38-58cm.

2. axially large displacement ball bearing according to claim 1 is characterized in that being equipped with on the outer ring dust cover.