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Seals and double row angular contact ball bearings

A technology of seals and inner seals, which is applied to shafts and bearings, bearing components, mechanical equipment, etc., can solve the problems of low machining accuracy of sealing grooves and poor sealing performance, so as to reduce processing steps, improve production efficiency, and improve sealing. performance effect

Active Publication Date: 2022-04-22
C&U CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a seal and a double-row angular contact ball bearing, which improves the cooperation between the seal and the seal groove, and solves the problem of poor sealing performance caused by the low processing precision of the seal groove in the prior art. Thereby improving the sealing effect at both ends of the double row angular contact ball bearing

Method used

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  • Seals and double row angular contact ball bearings
  • Seals and double row angular contact ball bearings
  • Seals and double row angular contact ball bearings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1 This embodiment provides a seal 5 with an optimized structure of the inner sealing lip 53, including a skeleton 51 and a sealing compound coated on the The outer sealing lip 52 and the inner sealing lip 53 are respectively formed at the ends, and the inner sealing lip 53 includes a non-contact lip, a contacting main lip 534, and a contacting auxiliary lip 533 distributed in sequence, and the contact between the contacting main lip 534 and the sealing groove of the bearing. A contact slope 534a is provided on the side, and the contact slope 534a is an inclined surface with a certain length. The width of the inclined surface is not less than 0.25mm. In a preferred embodiment, the width of the inclined surface is 0.36~0.42mm.

[0030] In addition, in the inner sealing lip 53 , there is an elongated connecting portion 532 connected between the part where the main lip 534 and the auxiliary lip 533 are in contact with the sealing compound covering the inner diamet...

Embodiment 2

[0031] Embodiment 2 In this embodiment, on the basis of Embodiment 1, the structure of the outer sealing lip 52 is further optimized: as image 3 As shown, the outer sealing lip 52 includes a contacting outer lip 521 and a contacting inner lip 522. The contacting outer lip 521 is directly arranged on the side of the sealing compound covering the outer diameter of the framework 51 that communicates with the outside world, and the contacting inner lip 522 The sealing compound covering the inner diameter of the skeleton 51 is arranged on the side facing away from the outside—this side is also the side facing the inside of the bearing, opposite to or close to the roller 3 during application. Because in the prior art, the structure of the contact inner lip 522 is solidified, and its position relative to the frame 51 can only be modified very slightly within the elastic range of the material of the sealant compound, so for low-precision processing, Sealing grooves with large dimensi...

Embodiment 3

[0036] Embodiment 3 This embodiment provides a double row angular contact ball bearing, including bearing outer ring 1, bearing inner ring 2, two rows of rollers 3 and two cages 4, bearing outer ring 1, bearing inner ring 2 two Each end is provided with a sealing groove, and the sealing member 5 provided in the above embodiment 1 is installed in the sealing groove.

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Abstract

The invention provides a seal and a double row angular contact ball bearing, belonging to the technical field of bearings, comprising a skeleton and a sealing compound covering the skeleton, wherein the sealing compound is formed at both ends of an inner diameter and an outer diameter of the skeleton respectively An outer sealing lip and an inner sealing lip, the inner sealing lip includes a non-contact lip, a contact main lip, and a contact auxiliary lip which are distributed in sequence, and the contact side of the main contact lip and the sealing groove of the bearing is set as an inclined surface , and an elongated connecting portion is commonly connected between the contacting main lip, the contacting auxiliary lip and the sealing compound covering the inner diameter of the skeleton. The invention softens and reduces the area of ​​the contact main lip, so as to obtain a higher main lip contact amount under the same torque, prevent the sealing instability caused by the line contact, and further adapt to the sealing groove with too low machining accuracy in the prior art, Improve the sealing effect and improve the sealing performance of double row angular contact ball bearings.

Description

technical field [0001] The invention relates to the field of bearings, in particular to a seal and a double row angular contact ball bearing thereof. Background technique [0002] Automobile air conditioner clutch bearings are double-row angular contact ball bearings that are commonly used in the industry at present, but the sealing performance of the product corresponds to its stability, reliability and consistency. There are problems; the sealing test (air tightness) of the product production line The pass rate is less than 90%; the problem investigation found that the product had water ingress under the harsh test conditions of the customer's test mud spray / mud spray / no water test, etc., accounting for about 30% of after-sales parts, which could not meet the needs of the market. [0003] In the conventional development of double row angular contact ball bearings, it is customary to exclude the grinding seal groove. The seal groove produced in this way is asymmetrical and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C33/78
CPCF16C33/7823F16C33/7816F16C33/7806
Inventor 夏玉明孙辉
Owner C&U CO LTD