CN201696500U

CN201696500U - Bearing with inclined assembly angles

Info

Publication number: CN201696500U
Application number: CN2010202319682U
Authority: CN
Inventors: 李芝根
Original assignee: NINGBO WTOO INDUSTRIAL Co Ltd
Current assignee: NINGBO WTOO INDUSTRIAL Co Ltd
Priority date: 2010-06-18
Filing date: 2010-06-18
Publication date: 2011-01-05
Anticipated expiration: 2020-06-18

Abstract

The utility model relates to a bearing with an inclined assembly angles, which is designed aiming at overcoming the defect of low assembly efficacy of a motor shaft and a bearing pedestal caused by undesirable surface shape of a chamfer of the existing like product. The key points on design are as follows: the inner ring and the outer ring of the bearing are provided with the inclined assembly angles; the surface shapes of the inclined assembly angles are that an angle of 12-15 degrees is cut along the X-axis direction of the inner hole of the inner ring or the surface of the outer cylinder of the outer ring, and an angle of 30-40 degrees is cut along the Y-axis direction of the end surface of the inner ring or the end surface of the outer ring; smooth arc transition is formed between two cut edges which are formed after cutting; the radius of the arc refers to R equal to 0.4-0.6mm; the X axis is the axial direction of the bearing; and the Y axis is arranged on the plane wherein the end surface of the inner ring and the end surface of the outer ring are located. The bearing achieves the demand of high-grade motors on precision of the bearing, and the assembly efficacy of the bearing is improved, thus having certain popularization and application values.

Description

Band tilts to assemble the bearing at angle

Technical field

The utility model relates to a kind of bearing with the assembling angle that tilts.

Background technique

At present, standard GB/T274-2000 has stipulated the maximum value and the minimum value of rolling bearing assembling chamfer dimesion, but, should not exceed the tangent circular arc 6 (seeing accompanying drawing 3) of bearing face 7 and bearing inner race endoporus or bearing outer ring outer cylinder surface 8 but be defined in its profile in the axial plane to the definite shape of chamfer surface regulation in advance.

Each producer is by above-mentioned standard production rolling bearing basically aborning, and is because the chamfer surface shape not necessarily, little when big during circular arc.Therefore, have the bearing of such assembling chamfering to consign to high-grade motor market user after, in use often there is following problem in the client:

When one, the axle of rotor installs to bearing hole, as the inconsistent of the assembly center line in axle and hole or because the guiding of chamfer surface circular arc does not freely cause axle smoothly in the load hole, little when big during the pressure in when axle dress, axle sometimes in addition dress do not enter, the accident that easily causes user's production line to interrupt takes place;

Because the assembling chamfer shape of outer ring, make the bearing bearing support of can not packing into smoothly when two, the outer ring of bearing installs on the bearing support of motor.The user wishes to improve the assembling chamfering of bearing for this reason, to solve the technical problem of motor shaft and bearing support assembling inconvenience.

The model utility content

For overcoming above-mentioned deficiency, satisfy user's requirement, the purpose of this utility model is to provide a kind of bearing with the assembling angle that tilts to related domain, it can be solved because of the chamfer surface design owe desirable, causes motor shaft and the lower technical problem of bearing support assembly efficiency.Its objective is and adopt following technological scheme to realize.

A kind of bearing with the assembling angle that tilts, this bearing comprises inner ring, outer ring, steel ball, retainer, dust cover, its main points are: be provided with the chamfering of being with inclination at the inner ring of bearing and the outer ring of bearing, described chamfering also claims band inclination assembling angle; The surface configuration that described band tilts to assemble the angle is to cut into 12～15 ° of angles in the X-axis direction along inner ring endoporus or outer cylinder surface place, outer ring, Y direction along inner ring end face or cycle surface place cuts into 30～40 ° of angles, and will passing through the circular arc smooth transition between described cutting formed two side cuts in back, radius of arc is R=0.4～0.6mm; Described X-axis direction and Y direction are also referred to as the edge of X-axis line and Y-axis line benchmark and stretch line, and described X-axis line is the axial line of bearing, and described Y-axis line places on inner ring end face and the plane, cycle surface place.

After the outer ring heat treatment of the inner ring of bearing, bearing on the basis of former deep groove ball bearing technology each parameter of raceway groove grinding to Internal and external cycle carried out strict control, for bear vibration is met the requirements, strengthened super smart quality control behind the inside and outside lasso of the bearing correct grinding ditch, especially trap, cleaning, greasing, the gland of bearing assembly technology are checked on the quality of equipment, the cleaning of bearing assembly environment, thus guaranteed that bearing reaches the requirement of client's vibration.

Radial internal clearance between the inside and outside circle of described bearing is made as A, the bearing end-play A that uses on the high-grade motor is set to 0.004～0.011mm, because of high-grade rotating speed of motor is generally 2～3,000 commentaries on classics/per minutes, so the radial internal clearance of this bearing can adapt to rotating speed of motor.Because high-grade electrical machinery plant, joint or wholly foreign owned enterprises all adopt automatic assembly line production, band tilts to assemble the bearing at angle, owing to be with two tilt angle, the tilt angle that two places as shown in Figure 1 confine at identical E place, make user's assembled shaft and bearing install to bearing support and all compare smoothly, thereby satisfied the client the continuous automation matching requirements of bearing.

The utility model has reached the requirement of high-grade motor to bearing accuracy, adopts this kind by connecting the chamfering that circular arc constituted between two hypotenuses, and it is undesirable because of chamfering to have solved existing bearing, causes the lower technical problem of installation efficiency.

Description of drawings

Fig. 1 is a structural representation of the present utility model, among the figure inner ring of the bearing position identical with the outer ring chamfering has all been done E portion respectively and has confined.

Fig. 2 is that band tilted to assemble the structure for amplifying schematic representation at angle during the E portion of Fig. 1 confined, and wherein rsmax represents the chamfering maximum value.

Fig. 3 is the assembling chamfer dimesion enlarged diagram of standard GB/T274-2000 regulation, and wherein rsmax represents the chamfering maximum value.

Embodiment

In conjunction with Fig. 1～Fig. 3, the utility model is made of inner ring 1, outer ring 2, steel ball 3, retainer 4, dust cover 5, as shown in Figure 3, refer to the axial of bearing in X-axis direction, the Y-axis line is on the plane at bearing enclose end face 7 places, the radius of the circular arc 6 shown in the figure three equates R=0.4～0.6mm with the radius R of the arc transition shown in Fig. 2.Technological process of the present utility model and known basic identical, difference is that inner ring 1, outer ring 2 are when cutting, as shown in Figure 2, the surface configuration of assembling chamfering cuts into 12～15 ° of angles at the X axis along described inner ring endoporus or outer cylinder surface place, Y-axis along inner ring end face and cycle surface place cuts into 30～40 ° of angles, and will cut back two the side cut smooth transition that form with the circular arc of R=0.4～0.6mm.Because bearing enclose has two assembling angles that tilt, thereby has satisfied the matching requirements of client to the continuous automation of bearing.

Claims

1. bearing with the assembling angle that tilts, this bearing comprises inner ring (1), outer ring (2), steel ball (3), retainer (4), dust cover (5), it is characterized in that: be provided with the chamfering of band inclination in the inner ring (1) and the outer ring (2) of bearing of bearing, described chamfering also claims band to tilt to assemble the angle; The surface configuration that described band tilts to assemble the angle is to cut into 12～15 ° of angles in the X-axis direction along inner ring endoporus or outer cylinder surface place, outer ring, Y direction along inner ring end face or cycle surface place cuts into 30～40 ° of angles, and will passing through the circular arc smooth transition between described cutting formed two side cuts in back, radius of arc is R=0.4～0.6mm; Described X-axis direction and Y direction are also referred to as the edge of X-axis line and Y-axis line benchmark and stretch line, and described X-axis line is the axial line of bearing, and described Y-axis line places on inner ring end face and the plane, cycle surface place.