CN203730767U

CN203730767U - Dustproof high-speed-resistant combined oil seal for shaft

Info

Publication number: CN203730767U
Application number: CN201420152816.1U
Authority: CN
Inventors: 陈乙强; 邓志文; 黄文雄
Original assignee: GUANGDONG JINGSHAN SEALING MATERIAL CO Ltd
Current assignee: GUANGDONG JINGSHAN SEALING MATERIAL CO Ltd
Priority date: 2014-03-28
Filing date: 2014-03-28
Publication date: 2014-07-23
Anticipated expiration: 2024-03-28

Abstract

The utility model relates to a dustproof high-speed-resistant combined oil seal for a shaft. The combined oil seal comprises an outer oil seal and an inner oil seal, wherein the outer oil seal comprises a back pull type outer framework, a first rubber body and a spring; the spring sleeves a main sealing lip of the first rubber body; a first auxiliary sealing edge and a second auxiliary sealing edge are arranged at the front end of the sealing lip to form a dustproof double-auxiliary-lip sealing structure; the inner oil seal comprises a barrel type inner framework and a second rubber body; the second rubber body is directly injected to a barrel bottom of the barrel type inner framework and is provided with a third auxiliary sealing edge; a barrel body of the barrel type inner framework is pressed into the inner wall of the back pull type outer framework to form an assembly structure of rigid and tight interference fit of the outer oil seal and the inner oil seal. The dustproof high-speed-resistant combined oil seal for the shaft has the advantages that the existing shape of the oil seal is kept; the following performance is excellent; the sealing effect is better; the strength of the outer sealing end surface is improved; the muddy water preventing effect is better. The dustproof high-speed-resistant combined oil seal for the shaft is applicable to various oil seals in the occasions for high-speed muddy-water-preventing shafts of rear axles of heavy engineering trucks.

Description

A kind of dustproof resistance to high speed shaft combination oil seal

Technical field

The utility model relates to a kind of dustproof resistance to high speed shaft combination oil seal.

Background technique

Along with aspect development such as the high speed of heavy engineering automobile and carrying capacity enhancings, more and more harsher to the anti-muddy water of oil sealing and requirement sealing life, automobile uses after certain hour, because muddy water and earth enter in axle housing more more for a long time, the jerk value of seal shaft is also increasing simultaneously, temperature is also just more and more higher, and how research adapts to the working conditions such as automobile overload, Environmental Conditions be severe, improve oil sealing sealing reliability, reduce leakage rate, to extend oil sealing very necessary working life.

Summary of the invention

The purpose of this utility model is for above-mentioned existing problems, provides a kind of and can keep the existing shape of oil sealing, trace performance is good, sealing effect is better, improve the dustproof resistance to high speed shaft combination oil seal of external sealed end face intensity, anti-muddy water better effects if.

The realization of the purpose of this utility model, comprise outer oil seal and inner oil seal; Outer oil seal comprises anti-pull-type outer skeleton, the first rubber body and spring, and spring housing is located in the primary seal lip of the first rubber body, at the front end of sealing lip, the first secondary seal lip and the second secondary seal lip is set and forms dustproof two-pack lip seal structure; Inner oil seal comprises cartridge type inner frame and the second rubber body, and the second rubber body cylinder that directly note is located at cartridge type inner frame is at the end, and the second rubber body is provided with the 3rd secondary seal lip; The cylindrical shell of cartridge type inner frame is pressed in the inwall of anti-pull-type outer skeleton and forms the structure of outer oil seal and the assembling of inner oil seal interference rigidity drive fit.

The utility model, the unidirectional return wire that the degree of depth that is provided with return wire in the primary seal lip of the first rubber body is 0.03 ~ 0.15mm.

The utility model, the sense of rotation of unidirectional return wire is left-handed or dextrorotation.

The utility model, has following good effect:

1), the first rubber body of outer oil seal arranges primary seal lip and the first secondary seal lip and the second secondary seal lip and forms dustproof two-pack lip seal structure, two secondary seal lips prevent that muddy water from entering oil sealing primary seal lip, avoid muddy water to enter axle housing internal contamination gear oil and damage thus oil sealing primary seal lip and the sealing oil that causes is leaked;

2), inner oil seal is compressed on outer oil seal inwall, can improve on the one hand the intensity of outer oil seal seal face, another side aspect can reduce again the pressure that wheel hub forms when overload oppresses body of rubber, can improve oil sealing Environmental Conditions, increases the service life;

3), the second rubber body of inner oil seal has additional the 3rd secondary seal lip, coordinates with the dust cover of axle housing, greatly reduces earth and muddy water and enters in axle housing, improves the sealing effect of inner oil seal sealing unit;

4), unidirectional return wire contributes to oil to be drawn back in axle housing, makes axle when High Rotation Speed, reach good sealing effect.

The utility model, have advantages of keep the existing shape of oil sealing, trace performance is good, sealing effect is better, raising external sealed end face intensity, anti-muddy water better effects if.Be applicable to the various oil sealings of occasion for the anti-muddy water axle of heavy engineering automobile axle high speed.

Embodiment is further described the utility model by reference to the accompanying drawings below.

Accompanying drawing explanation

Fig. 1 is an embodiment's of the present utility model structural representation.

In figure, 1, anti-pull-type outer skeleton; 2, the first rubber body; 3, spring; 4, primary seal lip; 5, the first secondary seal lip; 6, the second secondary seal lip; 7, cartridge type inner frame; 8, the second rubber body; 9, the cylinder end of cartridge type inner frame; 10, the 3rd secondary seal lip; 11, the cylindrical shell of cartridge type inner frame; 12, unidirectional return wire.

Embodiment

With reference to Fig. 1, the present embodiment is a kind of dustproof resistance to high speed shaft combination oil seal, comprises outer oil seal and inner oil seal; Outer oil seal comprises anti-pull-type outer skeleton 1, the first rubber body 2 and spring 3, and spring housing is located in the primary seal lip 4 of the first rubber body, at the front end of sealing lip, the first secondary seal lip 5 and the second secondary seal lip 6 is set and forms dustproof two-pack lip seal structure; Inner oil seal comprises that cartridge type inner frame 7 and the second rubber body 8, the second rubber body cylinder that directly note is located at cartridge type inner frame is at the end 9, and the second rubber body is provided with the 3rd secondary seal lip 10; The cylindrical shell 11 of cartridge type inner frame is pressed in the inwall of anti-pull-type outer skeleton and forms the structure of outer oil seal and the assembling of inner oil seal interference rigidity drive fit; The unidirectional return wire 12 that the degree of depth that is provided with return wire in the primary seal lip 4 of the first rubber body is 0.03 ~ 0.15mm, the sense of rotation of unidirectional return wire is left-handed.

The utility model, adopts after such structure, during use, can either keep the original good seal performance of oil sealing, and also sealing effect dustproof to it when using under the severe occasion of operating mode, anti-muddy water can be significantly improved; Can eliminate again common oil sealing rubber and pay lip not wear-resisting impact under work under bad environment, extend oil sealing working life, working life of the present utility model is considerably beyond previously used various oil sealing, its is also adapted to produce in enormous quantities simultaneously, is to improve at present heavy engineering automobile oil seal sealability, extend oil sealing a kind of comparatively practical oil sealing in working life.

Claims

1. a dustproof resistance to high speed shaft combination oil seal, is characterized in that: comprise outer oil seal and inner oil seal; Described outer oil seal comprises anti-pull-type outer skeleton (1), the first rubber body (2) and spring (3), it is upper that described spring housing is located at the primary seal lip (4) of the first rubber body, at the front end of described sealing lip, the first secondary seal lip (5) and the second secondary seal lip (6) is set and forms the two-pack lip seal structure of preventing dust; Described inner oil seal comprises cartridge type inner frame (7) and the second rubber body (8), and described the second rubber body directly note is located on the cylinder end (9) of described cartridge type inner frame, and described the second rubber body is provided with the 3rd secondary seal lip (10); The cylindrical shell of described cartridge type inner frame (11) is pressed in the inwall of anti-pull-type outer skeleton and forms the structure of outer oil seal and the assembling of inner oil seal interference rigidity drive fit.

2. dustproof resistance to high speed shaft combination oil seal according to claim 1, is characterized in that: the unidirectional return wire (12) that the degree of depth that is provided with return wire in the primary seal lip of described the first rubber body (4) is 0.03 ~ 0.15mm.

3. dustproof resistance to high speed shaft combination oil seal according to claim 2, is characterized in that: the sense of rotation of described unidirectional return wire (12) is left-handed or dextrorotation.