CN103470735B - The method of single-row angular contact ball bearing paired mounting and structure thereof - Google Patents

Abstract

Method for the single-row angular contact ball bearing paired mounting of precise rotary shaft system: (1). use contact angle measurement to measure the wrapping angle of bearing with ; (2). measure bearing inner race thickness with vernier calliper with ; (3). inquiry mechanical design handbook obtains rolling element center radius of a circle numerical value; (4). the data that (1), (2), (3) step is obtained substitute into formula and obtain: , wherein for packing ring axial dimension; (5). (4) obtain packing ring axial dimension according to step , process 2 adjustment packing rings; . trial assembly angular contact ball bearing and reconditioning adjustment packing ring, make the support reaction point of action counterpoise of two groups of single-row angular contact ball bearings be combined into 1 point.The present invention determines one line theory according to 2, total support reaction point of action number of precise rotary shaft system is designed to two, overcome the mechanics statically indeterminate problem that traditional support mode exists, simultaneously, present invention overcomes conventional mounting mode coaxality requires high, the problem that difficulty of processing is larger, present invention significantly reduces difficulty of processing.

Description

The method of single-row angular contact ball bearing paired mounting and structure thereof

Technical field

The invention belongs to field of precision instruments, be specifically related to a kind of method of single-row angular contact ball bearing paired mounting, and this installation method is applied to the new structure that precise rotary shaft system obtains.

Background technique

Angular contact ball bearing is a kind of conventional bearing, can bear radial and one-sided axial connected load, have the advantages that precision is good, limit speed is high, and application widely.In order to improve bearing capacity and the rigidity of bearing, precise rotary shaft system adopts the mode of two or more angular contact ball bearing assembly usually.Angular contact ball bearing paired mounting mode is divided three classes: angular contact ball bearing is installed face-to-face (X-type), angular contact ball bearing installs (O type) back-to-back and angular contact ball bearing is installed in series (as Fig. 1), and multiple bearing installations are then the combinations of above 3 types.

At present, the support reaction point of action of the mode of single-row angular contact ball bearing paired mounting is 2, as shown in Figure 1 (support reaction point of action A, B).Because precise rotary shaft is 2 supporting bases, namely need the angular contact ball bearing of 2 groups of paired mounting, then the actual support reaction point of action of turning axle is 4.This supporting way belongs to statically indeterminate problem in mechanics, although its support reaction can calculate, affect by machining accuracy or assembling correction accuracy, its actual LOAD FOR result there will be deviation, larger to the axis error that span is less especially; Moreover, because the support reaction point of action of traditional turning axle is too much, then require high to the coaxality of bearing support, cause difficulty of processing to increase.

Summary of the invention

The object of this invention is to provide a kind of method of single-row angular contact ball bearing paired mounting, and this installation method is applied to the new structure that precise rotary shaft system obtains.The method and new structure are applicable to precise rotary shaft system platform.

The technological scheme of this invention task is: a kind of method of the single-row angular contact ball bearing paired mounting for precise rotary shaft system, and it is characterized in that, step is as follows,

(1). use contact angle measurement to measure wrapping angle α and β of angular contact ball bearing bearing;

(2). measure angular contact ball bearing bearing inner race thickness and a and b with vernier calliper;

(3). inquiry mechanical design handbook, obtains rolling element center radius of a circle e, f numerical value;

(4). the data that (1), (2), (3) step is obtained substitute into formula and obtain: c is wherein packing ring axial dimension;

(5). (4) obtain packing ring axial dimension c according to step, process 1 adjustment packing ring;

(6). trial assembly angular contact ball bearing reconditioning adjustment packing ring, make the support reaction point of action of 2 single-row angular contact ball bearings overlap as a bit.

Domestic precision corner contact ball bearing has 15 ° and 25 ° of two kinds of wrapping angles, and error is comparatively large, and the wrapping angle of bearing needs to be as the criterion with actual measured value.Application claims selects the angular contact ball bearing of wrapping angle same model.

The scheme completing the application's the 2nd invention task is, according to the new structure that above method obtains at precision rotating shafting installation two groups of single-row angular contact ball bearings, two groups of angular contact ball bearings are face-to-face installation, it is characterized in that, in the position that this two angular contact ball bearings are relative, be equipped with adjustment packing ring, this packing ring axial dimension c, determine according to following formula:

$c=(e\·tan\mathrm{\α}-\frac{a}{2})+(f\·tan\mathrm{\β}-\frac{b}{2});$

Wherein, α and β is respectively the wrapping angle of bearing; A and b is respectively bearing inner race thickness; E, f are respectively bearing roller center radius of a circle.

In other words, the present invention, before bearing is installed, need process 2 adjustment packing rings in advance.Trial assembly angular contact ball bearing and reconditioning adjustment packing ring, make the support reaction point of action counterpoise of 2 groups of single-row angular contact ball bearings be combined into 1 point, as shown in Figure 2.Then the support reaction point of action of precise rotary shaft system is designed to 2 points, as shown in Figure 3.

This organization plan improves the one of face-to-face (X-type) Bearing configuration.Structure after improvement under the prerequisite of feature keeping angular contact ball bearing, can have the advantage of selfaligning ball bearing concurrently, and can bear bi-directional axial load.This structure meets the theorem that determine straight line completely at 2, and precision bearing system is in the state of 2 support reaction point of action all the time.Compared with the traditional support mode of same precision, the coaxality receptance of precise rotary shaft to bearing support adopting the present invention program to install is lower.

The present invention is theoretical according to " determining a line at 2 ", the support reaction point of action number of precise rotary shaft system is designed to 2, overcome " mechanics static indeterminacy " problem that traditional support mode exists, simultaneously, present invention overcomes traditional support mode coaxality requires high, the problem that difficulty of processing is larger, the solution of the present invention substantially reduces difficulty of processing.

Accompanying drawing explanation

Fig. 1 illustrates three kinds of modes of angular contact ball bearing paired mounting in prior art, and wherein Fig. 1-a is that angular contact ball bearing is installed face-to-face; Fig. 1-b is that angular contact ball bearing and bearing are installed back-to-back; Fig. 1-c is that angular contact ball bearing and bearing are installed in series; In figure, 1 is single-row angular contact ball bearing; 2 is bearing support.

Fig. 2 illustrates the mode of angular contact ball bearing paired mounting of the present invention.

Fig. 3 illustrates the mounting type of precise rotary shaft system of the present invention.

Embodiment

Embodiment 1, the new structure of single-row angular contact ball bearing paired mounting, as shown in Figure 2, contact angle measurement is used to measure wrapping angle α and β, bearing inner race thickness a and b is measured with vernier calliper, inquiry mechanical design handbook obtains rolling element center radius of a circle e, f numerical value, data is substituted into formula and obtains: wherein c is packing ring axial dimension.In figure, 3 is adjustment packing ring, and some D is for being total to public support reaction point of action.

Process 2 adjustment packing rings, its size is according to the internal diameter of selected single-row angular contact ball bearing inner ring and external diameter and the c design that calculates above.

Trial assembly angular contact ball bearing and adjustment packing ring on bearing support, reconditioning adjustment packing ring axial dimension, until angular contact ball bearing meets support reaction point of action altogether, as shown in Figure 3.In figure, 4 is running shaft, and some E, F are for being total to public support reaction point of action.

Claims (4)

1. a method for single-row angular contact ball bearing paired mounting, it is characterized in that, step is as follows,

(1). use contact angle measurement to measure wrapping angle α and β of angular contact ball bearing;

(2). measure angular contact ball bearing bearing inner race thickness a and b with vernier calliper;

(3). inquiry mechanical design handbook, obtains rolling element center radius of a circle e, f numerical value;

(4). the data that (1), (2), (3) step is obtained substitute into formula and obtain: c is wherein adjustment packing ring axial dimension;

(5). be (4) adjusted packing ring axial dimension c according to step, process 1 adjustment packing ring;

. trial assembly angular contact ball bearing and reconditioning adjustment packing ring, make the support reaction point of action of two single-row angular contact ball bearings overlap be 1 point.

2. the method for single-row angular contact ball bearing paired mounting according to claim 1, is characterized in that, described two angular contact ball bearings adopt the angular contact ball bearing of wrapping angle same model.

3. the method for paired mounting described in claim 1 is applied to the structure that precise rotary shaft system obtains, two groups of angular contact ball bearings are face-to-face installation, it is characterized in that, in the position that two angular contact ball bearings often organized are relative, be equipped with adjustment packing ring, this adjustment packing ring axial dimension c, determines according to following formula:

Wherein, α and β is respectively the wrapping angle of bearing; A and b is respectively bearing inner race thickness; E, f are respectively bearing roller center radius of a circle.

4. the method for paired mounting described in claim 3 is applied to the structure that precise rotary shaft system obtains, and it is characterized in that, described two angular contact ball bearings adopt the angular contact ball bearing of wrapping angle same model.