CN202203406U

CN202203406U - Oil seal for wheel edge of engineering machinery

Info

Publication number: CN202203406U
Application number: CN2011202437537U
Authority: CN
Inventors: 宋振德
Original assignee: LONGKOU FLYING WHEEL CAR ACCESSORIES CO Ltd
Current assignee: LONGKOU FLYING WHEEL CAR ACCESSORIES CO Ltd
Priority date: 2011-07-12
Filing date: 2011-07-12
Publication date: 2012-04-25
Anticipated expiration: 2021-07-12

Abstract

The utility model relates to a sealing component, which belongs to the technical field of structures of sealing components. An oil seal for a wheel edge of an engineering machinery comprises a framework and a rubber sealing body which is attached to the framework, and is characterized in that: the framework has a multi-framework structure; the framework comprises an inner framework (4) in interference fit with a shaft, an outer framework (8) in interference fit with a cavity and a middle framework (7) which is arranged between the inner framework (4) and the outer framework (8); the rubber sealing body is encircled on the outer framework (8); and the rubber sealing body and the inner framework (4) form a labyrinth-type structure through a first protective lip (1), a second protective lip (2), a third protective lip (3) and a main flange (5) which are raised on the outer surface of the rubber sealing body. Through a multi-framework labyrinth structure, the outer framework is in interference fit with the cavity, the inner framework is in interference fit with the shaft, and the main flange directly contacts the inner framework to realize a sealing effect; and a reasonable spatial structure can keep the main flange away from water and dust by a certain distance, so that ineffective sealing caused by invasion of muddy water can be prevented effectively.

Description

Engineering machinery wheel limit oil sealing

Technical field

The utility model relates to a kind of Sealing, and particularly a kind of limit oil sealing of taking turns belongs to the seal configuration technical field.

Background technique

At present, the oil sealing of conventional construction is as shown in Figure 1, and it exists defective following:

1, to the requirement of cavity

Conventional construction oil sealing external diameter is an iron-clad, directly contacts with cavity, and is easy to wear, the slightly degree of making of cavity required very high, is prone to scratch cavity during installation, to working life of cavity and oil sealing all receiving very big influence.

2, to the requirement of axle

Traditional oil seal structure master lip is directly to touch with being coupling, and main lip easy to wear causes main lip seal effect to lose efficacy, and reduces product working life.

3, to the requirement of working environment

Main lip is unique anti-lip care; Because of wheel hub running environmental characteristics; Determine main lip seal place influenced by extraneous muddy water, thereby reduce sealability that institute is in case muddy water is attacked also is the emphasis in enhanced feature and life-span; The structure of tradition oil sealing does not have the specific aim design, and it will unite use with a lips type oil sealing usually.

4, maintain and replace

The oil sealing of conventional construction is when maintenance or changing, and axial plane needs machining again, and can only use once, just pulls down and scraps.

Summary of the invention

The purpose of the utility model is to solve the deficiency that above-mentioned prior art exists, the engineering machinery wheel limit oil sealing that a kind of reasonable in design is provided, wear resistance is good, sealability is excellent, the while can be improved working life.

The technological scheme of the utility model is following:

Engineering machinery wheel limit oil sealing; Comprise skeleton and attached to the rubbery sealed body on the skeleton; Its special way is that said skeleton adopts the boniness shelf structure; Comprise and the inner frame 4 of axle interference fit, with the outer skeleton 8 of cavity interference fit and be located at middle the skeleton 7 between the inside and outside skeleton, said rubbery sealed body is paperwrapped on the outer skeleton 8 and through the anti-lip care 1 in first road, the anti-lip care 2 in second road, the 3rd road that its outer surface is convexly equipped with prevents lip care 3 and main lip 5 and inner frame 4 formation labyrinth seal structures;

Said inner frame 4 is fixedly connected with an end of middle skeleton 7;

Said inner frame 4 is provided with rubber layer with the side that axle cooperates, and has the ripple convexity on this rubber layer; The side that said outer skeleton 8 cooperates with cavity also is provided with rubber layer;

The anti-lip care 1 in said first road is located at folded mouthful of place between the inside and outside skeleton, rises and is located on the outer skeleton 8 also radial seal in inner frame 4;

The anti-lip care 2 in said second road is located at inside and outside skeleton and splices between the face, plays a supportive role; Anti-3 of the lip care in said the 3rd road are located at end and the axial seal of outer skeleton 8 in the corner of inner frame 4;

Said main lip 5 is located at the inboard of inner frame 4 through self-tightening spring 6 hoops and is positioned at the top of the anti-lip care 3 in the 3rd road.

The utility model engineering machinery wheel limit oil sealing produces a mouthful labyrinth structure that adopts the boniness frame, outer skeleton (being with main lip) and cavity interference fit; Inner frame and axle interference fit, main lip directly contacts with inner frame, forms sealing; Oil sealing has the anti-lip care in 3 roads, and the anti-lip care in first and second road can prevent that the big silt particle material from getting into, and the anti-lip care in the 3rd road prevents that muddy water from getting into; The reasonable space structure can make main lip and water and dust keep a segment distance, effectively prevents the seal failure problem that causes because of the muddy water invasion.

Description of drawings

Fig. 1: be prior art oil seal structure schematic representation;

Fig. 2: the utility model engineering machinery wheel limit oil sealing longitudinal cross-sectional view.

Embodiment

Following with reference to accompanying drawing, provide the embodiment of the utility model, be used for the formation of the utility model is further specified.

Embodiment 1

The engineering machinery wheel limit oil sealing of present embodiment is with reference to figure 2; Comprise skeleton and attached to the rubbery sealed body on the skeleton; Said skeleton adopts the boniness shelf structure; Comprise and the inner frame 4 of axle interference fit, with the outer skeleton 8 of cavity interference fit and be located at middle the skeleton 7 between the inside and outside skeleton, said rubbery sealed body is paperwrapped on the outer skeleton 8 and through the anti-lip care 1 in first road, the anti-lip care 2 in second road, the 3rd road that its outer surface is convexly equipped with prevents lip care 3 and main lip 5 and inner frame 4 formation labyrinth seal structures; Inner frame 4 is fixedly connected with an end of middle skeleton 7; Inner frame 4 is provided with rubber layer with the side that axle cooperates, and has the ripple convexity on this rubber layer; The side that said outer skeleton 8 cooperates with cavity also is provided with rubber layer; The anti-lip care 1 in first road is located at folded mouthful of place between the inside and outside skeleton, rises and is located on the outer skeleton 8 also radial seal in inner frame 4; The anti-lip care 2 in second road is located at inside and outside skeleton and splices between the face, plays a supportive role; Anti-3 of the lip care in said the 3rd road are located at end and the axial seal of outer skeleton 8 in the corner of inner frame 4; Main lip 5 is located at the inboard of inner frame 4 through self-tightening spring 6 hoops and is positioned at the top of the anti-lip care 3 in the 3rd road.

The engineering machinery wheel limit oil sealing of present embodiment is compared with traditional structure oil sealing, has following advantage:

1, to the cavity requirement

The external diameter of present embodiment oil sealing is an outpacking rubber, contacts with cavity, and is not high to the slightly degree of making and the required precision in hole, is difficult for scratching cavity when product is installed.

2, to the requirement of axle

The present embodiment oil sealing is two frame design, to the roughness of axle require greater than 3.2 can, an axle surface need not be ground.

3, to the requirement of working environment

The oil sealing of present embodiment has anti-lip care (3 road), prevents general dust, muddy water and medium pollution and the intrusion of extraneous foul, has good sealing effect;

The oil sealing of present embodiment can both satisfy the hole and the requirement of axle; Environmental characteristic for oil sealing; Working life, the anti-aspect performances such as general and medium pollution and maintenance service that; When common oil sealing adopts old way not solve, generally can use the oil sealing of present embodiment to go to solve, and need not change cavity.

4, maintain and replace

The oil sealing of present embodiment can prolong the service cycle of work in maintenance with when changing, axial plane is machining again, the detachable repeated use.

Claims

1. engineering machinery is taken turns the limit oil sealing; Comprise skeleton and attached to the rubbery sealed body on the skeleton; It is characterized in that said skeleton adopts the boniness shelf structure; Comprise and the inner frame (4) of axle interference fit, with the outer skeleton (8) of cavity interference fit and be located at middle the skeleton (7) between the inside and outside skeleton, said rubbery sealed body is paperwrapped in that outer skeleton (8) is gone up and prevent lip care (3) and main lip (5) and inner frame (4) formation labyrinth seal structure through the anti-lip care (1) in first road, the anti-lip care (2) in second road, the 3rd road that its outer surface is convexly equipped with.

2. according to the said engineering machinery wheel of claim 1 limit oil sealing, it is characterized in that said inner frame (4) is fixedly connected with an end of middle skeleton (7).

3, according to the said engineering machinery wheel of claim 1 limit oil sealing, it is characterized in that said inner frame (4) is provided with rubber layer with the side that axle cooperates, and has the ripple convexity on this rubber layer; The side that said outer skeleton (8) cooperates with cavity also is provided with rubber layer.

4, according to the said engineering machinery of claim 1 wheel limit oil sealing, it is characterized in that the anti-lip care (1) in said first road is located at folded mouthful of place between the inside and outside skeleton, rise and be located at outer skeleton (8) and go up also axial seal in inner frame (4).

5, according to the said engineering machinery wheel of claim 1 limit oil sealing, it is characterized in that the anti-lip care (2) in said second road is located at inside and outside skeleton and splices between the face, play a supportive role; The anti-lip care (3) in said the 3rd road works the end of being located at outer skeleton (8) and radial seal in the corner of inner frame (4).

6,, it is characterized in that said main lip (5) binds round the top of being located at the inboard of inner frame (4) and being positioned at the anti-lip care (3) in the 3rd road through self-tightening spring (6) according to the said engineering machinery wheel of claim 1 limit oil sealing.