A kind of hub exterior seal ring anti-loose structure
The utility model belongs to sealing device technical field, more particularly to a kind of hub exterior seal ring anti-loose structure.
Sealing ring is not only corroded during hub use by dust, muddy water, but also by axially and radially
The effect of load.After press-fiting, basic frictionally is positioned existing sealing ring in the axial direction, when hub outer ring or interior
Circle can influence the position of sealing ring when being impacted by axial force, thus can because installation site it is inaccurate influence sealing property, make
Into hub failure damage.As shown in Figure 1, hub exterior seal ring include skeleton 1 and rubbery sealed body 2, skeleton 1 with
Rubbery sealed body 2 is gluing to be secured together, in assembling process, skeleton 1 and the interference fit of outer ring 3, three of rubbery sealed body 2
Sealing lip and the interference fit of flange 4.
The content of the invention
The purpose of this utility model is to overcome the shortcomings of that prior art is present, and provides a kind of orientable hub
Exterior seal ring anti-loose structure, it is accurate to ensure that sealing ring installation site is constant, reduce sealing ring failure, improve the use of hub
The purpose of this utility model is completed by following technical solution, including skeleton, rubbery sealed body, outer ring,
Flange, described skeleton forms complete hub exterior seal ring structure together with rubbery sealed body cementation, and with skeleton
It is fitted on the outer ring of hub；Described skeleton is interference fit with the outer ring on hub, in the mating surface of skeleton
It is provided with right angled triangle raised, the projection is embedded into the groove that outer ring is provided with；Described rubbery sealed body is provided with
Three sealing lips and flange interference fit.
Preferably, three described sealing lips are respectively the first sealing lip, the second sealing lip, the 3rd sealing lip, wherein
First annular seal space is constituted between the first sealing lip, the second sealing lip and flange, is constituted between the second sealing lip, the 3rd sealing lip and flange
Second annular seal space.
Preferably, described rubbery sealed body, constituting seal clearance between outer ring and flange.
The beneficial effects of the utility model are：This ring structure, not only ensure that sealing ring tightness energy, but also essence
The position of sealing ring is really secured, sealing ring its installation site will not be changed because of external factor such as load, reduce sealing
The failure of sealing property is enclosed, hub service life is improved.
Brief description of the drawings
Fig. 1 is existing hub exterior seal ring structural representation.
Fig. 2 is hub exterior seal ring structural representation of the present utility model.
Fig. 3 is use state structural representation of the present utility model.
Label in accompanying drawing is respectively：1st, skeleton；2nd, rubbery sealed body；3rd, outer ring；4th, flange；5th, seal clearance；6th,
One annular seal space；7th, the second annular seal space；1-1, projection；2-1, the first sealing lip；2-2, the second sealing lip；2-3, the 3rd sealing lip；
Detailed introduction is done to the utility model below in conjunction with accompanying drawing：As shown in accompanying drawing 2,3, the utility model includes bone
Frame 1, rubbery sealed body 2, outer ring 3, flange 4, described skeleton 1 form complete wheel hub together with the cementation of rubbery sealed body 2
Unit exterior seal ring structure, and be fitted on the outer ring 3 of hub with skeleton 1；It is outer on described skeleton 1 and hub
It is interference fit to enclose 3 inner surfaces, it is to avoid micro gap herein, prevents muddy water from entering bearing through this gap and producing frictional force.
Right angled triangle projection 1-1 is provided with the mating surface of skeleton 1, the raised 1-1 is embedded into the groove 3-1 that outer ring 3 is provided with,
The raised 1-1 of skeleton 1 coordinates with the groove 3-1 of the outer ring 3 of hub, can not only ensure that skeleton has accurate position,
And then avoid making sealing ring position change because of extraneous factor, it is ensured that the essence of sealing ring position in the hub course of work
It is accurate；Also illustrate that sealing ring has reached normal mounting position when raised 1-1 is embedded in groove 3-1, also with positioning function；
Three sealing lips that described rubbery sealed body 2 is provided with and the interference fit of flange 4.
Three described sealing lips are respectively the first sealing lip 2-1, the second sealing lip 2-2, the 3rd sealing lip 2-3, wherein
First annular seal space 6, the second sealing lip 2-2, the 3rd sealing lip are constituted between the first sealing lip 2-1, the second sealing lip 2-2 and flange 4
The second annular seal space 7 is constituted between 2-3 and flange 4；Described rubbery sealed body 2, composition seal clearance 5 between outer ring 3 and flange 4.
First sealing lip 2-1 and the interference fit of flange 4, prevent to enter external dust, the mud of sealing ring via seal clearance 5
The impurity such as water are entered back into first annular seal space 6；Second sealing lip 2-2 and the interference fit of flange 4, prevent in first annular seal space 6
The impurity such as dust, muddy water enter in the second annular seal space 7；3rd sealing lip 2-3 and the interference fit of flange 4, prevent the second annular seal space 7
The impurity such as interior dust, muddy water enter inside hub；These three sealing lips can also prevent the oil inside hub simultaneously
The sealed lip of fat is leaked to outside.
The annular seal space 7 of first annular seal space 6 and second all has store function, there is a small amount of grease in each annular seal space,
Not only spin friction can have been reduced but also each sealing lip is had good lubrication, and reduced abrasion, delay sealing ring and hub and use
Life-span.Simultaneously because the suction-operated of grease, can slow down the impurity such as dust, muddy water into the speed inside hub again.
The utility model is not limited to above-mentioned implementation method, all no matter constitute making any change in its shape or material
It, using structure design provided by the utility model, is all a kind of deformation of the present utility model to be, is considered as new in this practicality
Within type protection domain.