Method for selecting and matching inner space rings during axial clearance pairing of double-row angular contact ball bearings

Abstract

The invention discloses a method for selecting and matching an inner space ring during axial clearance pairing of a double-row angular contact ball bearing. The method comprises the following steps: S1, measuring and recording the height C of a bearing outer ring; s2, the distances h1 and h2 from the end face of the bearing outer ring to the small end faces of the two bearing inner rings are measured and recorded respectively; s3, the distance a between the small end faces of the two bearing inner rings is calculated according to the formula a = h1 + h2-C; S4, the height a'of the bearing inner space ring is calculated according to the formula a '= a-Ga, and Ga is the designed axial gap between the small end faces of the two bearing inner rings.

Description

Technical Field

[0001] The invention relates to a method for selecting inner spacers when matching axial clearances of double-row angular contact ball bearings. Background Art

[0002] Double-row angular contact ball bearings are a widely used type of bearings. In order to increase the service life of the bearings, a certain axial preload is applied to the bearings during the installation process. This axial preload should not be too small or too large. If the axial preload is too small, it will not achieve the purpose of increasing the service life of the bearings, and if the axial preload is too large, it will reduce the service life of the bearings. For double-row angular contact ball bearings with double raceways on the outer ring 10 and single raceway structures on the two inner rings 11 and 13, the axial preload is applied to the large end face of the inner ring. In order to quickly and accurately apply axial preload to the bearings, the gap to be reserved between the small end faces of the two inner rings is generally calculated based on the axial stiffness displacement of the bearings. Due to the problem of manufacturing precision, the gap between the small end faces of the two inner rings often cannot meet the design requirements, so in the product design process, an inner spacer 12 is added to control and adjust the gap between the small end faces of the two inner rings 11 and 13. During the installation of this type of double-row angular contact ball bearing, it is only necessary to apply force to the large end faces of the two inner rings 11 and 13 to eliminate the gap inside the bearing and make the small end faces of the two inner rings 11 and 13 fit with the two end faces of the inner spacer ring 12 one by one (see Figure 1 ). Therefore, in the manufacturing process of bearings, it is very important to choose the inner spacer with the right height. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a method for selecting inner spacers when pairing axial clearance of double-row angular contact ball bearings, which can quickly and accurately select inner spacers of appropriate height.

[0004] The object of the present invention is achieved by: a method for selecting an inner spacer when a double-row angular contact ball bearing is paired with an axial clearance, comprising the following steps:

[0005] S1. Measure and record the height C of the bearing outer ring;

[0006] S2. Measure and record the distances h1 and h2 from the end face of the bearing outer ring to the small end faces of the two bearing inner rings respectively;

[0007] S3. Calculate the distance a between the small end faces of the two bearing inner rings according to the following formula (1):

[0008] a=h1+h2-C (1)

[0009] S4. Calculate the height a' of the inner spacer of the bearing according to the following formula (2):

[0010] a'=a-|Ga| (2)

[0011] In the above formula (2), Ga is the designed axial clearance between the small end faces of the two bearing inner rings.

[0012] The above-mentioned method for selecting inner spacers when pairing axial clearance of double-row angular contact ball bearings, wherein, when performing step S2, first install the first bearing inner component into a raceway of the bearing outer ring, then measure and record the distance h1 between the small end face of the first bearing inner ring and the end face of the bearing outer ring away from the first bearing inner component, remove the first bearing inner component, and then install the second bearing inner component into another raceway of the bearing outer ring, and then measure and record the distance h2 between the small end face of the second bearing inner ring and the end face of the bearing outer ring away from the second bearing inner component.

[0013] The characteristics of the method for selecting the inner spacer when the double-row angular contact ball bearings are matched with the axial clearance of the present invention are:

[0014] 1. Improve the speed of selecting inner spacer ring.

[0015] 2. Improve the accuracy of selecting inner spacer rings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is an axial cross-sectional view of a double-row angular contact ball bearing targeted by the present invention;

[0017] Figure 2 is a state diagram when performing step S1 of the present invention;

[0018] Figure 3 is a state diagram when performing step S2 of the present invention;

[0019] Figure 4 is another state diagram when performing step S2 of the present invention;

[0020] Figure 5 is a state diagram when performing step S3 of the present invention;

[0021] Figure 6 This is a state diagram when performing step S4 of the present invention. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] See also Figures 2 to 6 The method for selecting inner spacer rings when pairing axial clearance of double-row angular contact ball bearings of the present invention comprises the following steps:

[0024] S1. Measure and record the height C of the bearing outer ring 10 (see Figure 2 );

[0025] S2. First install the first bearing inner component into a raceway of the bearing outer ring 10, then measure and record the distance h1 between the small end face of the first bearing inner ring 11 and the end face of the bearing outer ring 10 away from the first bearing inner component, and remove the first bearing inner component (see Figure 3 ), then install the second bearing inner component into the other raceway of the bearing outer ring 10, and then measure and record the distance h2 between the small end face of the second bearing inner ring 11 and the end face of the bearing outer ring 10 away from the second bearing inner component (see Figure 4 );

[0026] S3. Calculate the distance a between the small end face of the first bearing inner ring 11 and the small end face of the second bearing inner ring 13 according to the following formula (1) (see Figure 5 ):

[0027] a=h1+h2-C (1)

[0028] S4. Calculate the height a' of the inner spacer 12 of the bearing according to the following formula (2) (see Figure 6 ):

[0029] a'=a-|Ga| (2)

[0030] In the above formula (2), Ga is the designed axial clearance between the small end face of the first bearing inner ring 11 and the small end face of the second bearing inner ring 13.

[0031] The above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Those skilled in the relevant technical field may make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also belong to the scope of the present invention and should be defined by the claims.

Claims

1. A method for selecting inner spacer rings when pairing axial clearance of double-row angular contact ball bearings, characterized in that: The matching method comprises the following steps: S1. Measure and record the height C of the bearing outer ring; S2. Measure and record the distances h1 and h2 from the end face of the bearing outer ring to the small end faces of the two bearing inner rings respectively; S3. Calculate the distance a between the small end faces of the two bearing inner rings according to the following formula (1): a=h1+h2-C (1) S4. Calculate the height a' of the inner spacer of the bearing according to the following formula (2): a'=a-|Ga| (2) In the above formula (2), Ga is the designed axial clearance between the small end faces of the two bearing inner rings.

2. The method for selecting inner spacer rings when pairing axial clearance of double-row angular contact ball bearings according to claim 1 is characterized in that: When performing step S2, first install the first bearing inner component into a raceway of the bearing outer ring, then measure and record the distance h1 between the small end face of the first bearing inner ring and the end face of the bearing outer ring away from the first bearing inner component, remove the first bearing inner component, and then install the second bearing inner component into another raceway of the bearing outer ring, and then measure and record the distance h2 between the small end face of the second bearing inner ring and the end face of the bearing outer ring away from the second bearing inner component.

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