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Bearing retainer, rolling ball bearing and motor

A technology for bearing cages and rolling ball bearings, applied to bearing elements, shafts, bearings, shafts, etc., can solve the problems of uncompact sealing structure, oil seal easy to fall off, and normal operation of the motor, so as to achieve compact structure, avoid easy falling off, shorten The effect of length

Active Publication Date: 2021-12-21
GREE ELECTRIC APPLIANCES INC OF ZHUHAI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention discloses a bearing cage, a rolling ball bearing and a motor, which are used to solve the problem of using an oil seal installed at the front end of the bearing at the shaft extension of the existing motor. The separate sealing structure is not compact, and the oil seal is easy to fall off during the installation process, which affects the normal operation of the motor

Method used

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  • Bearing retainer, rolling ball bearing and motor
  • Bearing retainer, rolling ball bearing and motor
  • Bearing retainer, rolling ball bearing and motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In this embodiment a bearing cage is provided, such as Figure 1-Figure 5 As shown, the cage 10 has a support portion 11 along one side of its axial direction, and the support portion 11 is covered with a sealing body 12, and the sealing body 12 is used to seal the inner ring 21 and the inner ring 21 of the bearing 20. In the gap between the outer rings 22 , the sealing body 12 is provided with a shaft seal installation hole 121 , and the shaft seal installation hole 121 is coaxially arranged with the cage 10 .

[0037] Optionally, the sealing body may be rubber.

[0038] Preferably, an annular spring 50 is embedded in the sealing body 12, and the annular spring 50 is arranged coaxially with the shaft seal installation hole 121 and is located at the position of the shaft seal installation hole 121 to ensure that the shaft seal installation hole 121 and the shaft seal installation hole Sealed shaft surfaces fit together.

[0039]Specifically, the sealing body 12 has an...

Embodiment 2

[0048] The present invention provides a rolling ball bearing, including the bearing cage described in Embodiment 1.

[0049] Specifically, such as image 3 and Figure 5 As shown, the rolling ball bearing further includes: an inner ring 21; ball rolling elements 23, the cage 10 is provided with a plurality of pockets c along its circumference, and each pocket c is provided with a ball rolling element 23 The outer ring 22 is coaxially sleeved on the inner ring 21, an annular gap is formed between the outer ring 22 and the inner ring 21, and a plurality of The ball rolling element 23, the cage 10 is arranged in the annular gap.

[0050] Further, the outer surface of the inner ring 21 is provided with a first annular sealing groove 211 coaxial therewith, and the inner ring sealing part 122 is sealingly embedded in the first annular sealing groove 211; the outer ring 22 The outer circular surface is provided with a second annular sealing groove 221 coaxial therewith, and the ou...

Embodiment 3

[0054] The present invention provides a motor, including the rolling ball bearing described in Embodiment 2.

[0055] Such as figure 2 As shown, the motor also includes: a machine base 1, the front end of which is provided with a bearing shoulder c; a motor shaft 2, which is rotatably mounted on the machine base 1 through the rolling ball bearing 3, and the The end face sealing portion 124 on the bearing cage is in sealing contact with the shoulder c, and the shaft seal mounting hole 121 is in sealing fit with the motor shaft 2 .

[0056] By the formula:

[0057]

[0058]

[0059] Among them, RA—represents the thermal resistance per unit area, δ—represents the thickness of the thermally conductive material, λ—represents the thermal conductivity (thermal conductivity), φ—represents the heat flow through a given area A per unit time, θ—represents the thermal conductivity of the material end temperature difference.

[0060] From the above formulas (1) and (2), it can be...

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Abstract

The invention discloses a bearing retainer, a rolling ball bearing and a motor, and relates to the technical field of bearings. The bearing retainer aims to solve the problems that an independent sealing structure is not compact due to the fact that an oil seal is mounted at the front end of a bearing at a shaft extension position of an existing motor, and normal operation of the motor is affected due to the fact that the oil seal is prone to falling off in the mounting process. According to the bearing retainer, a supporting part is arranged on one side of the retainer in the axial direction of the retainer, the supporting part is coated with a sealing body, the sealing body is used for blocking a gap between an inner ring and an outer ring of the bearing, the sealing body is provided with a shaft seal mounting hole, and the shaft seal mounting hole and the retainer are coaxially arranged. The sealing body is arranged on the bearing retainer, the sealing body is used for blocking the gap between the inner ring and the outer ring of the bearing, the sealing body is provided with the shaft seal mounting hole, and the shaft seal mounting hole is in sealing fit with a shaft extension position of a motor shaft, so that the problem that the motor oil seal is prone to falling off is solved.

Description

technical field [0001] The invention relates to the technical field of bearings, in particular to a bearing cage, a rolling ball bearing and a motor. Background technique [0002] As a driving component, servo motors are widely used in various fields. When they are installed on equipment, the volume of the motor itself is gradually reduced. In different fields and equipment, in some special working conditions, the sealing requirements for shaft extensions are relatively high. , so the protection of the shaft extension has gradually become an important issue. [0003] The existing motor uses an oil seal at the shaft extension of the housing to seal the motor separately. The oil seal is easy to fall off during the assembly process, and the oil in the equipment is easy to enter the motor during use and affect the normal operation of the motor. However, ordinary bearings do not It has the function of sealing the shaft extension of the motor. The oil seal is used to seal the sha...

Claims

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Application Information

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IPC IPC(8): F16C33/38F16C33/58F16C33/78H02K5/173
CPCF16C33/38F16C33/7806F16C33/782F16C33/7846F16C33/583H02K5/173F16C2380/26
Inventor 郭燕王瑞东李峰岩陈飞龙陈应翔
Owner GREE ELECTRIC APPLIANCES INC OF ZHUHAI
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