CN201293101Y

CN201293101Y - Wave external wall reinforced seal

Info

Publication number: CN201293101Y
Application number: CNU200820161321XU
Authority: CN
Inventors: 许钧智
Original assignee: SHUYUAN MACHINERY ENTERPRISE (KUNSHAN) CO Ltd
Current assignee: SHUYUAN MACHINERY ENTERPRISE (KUNSHAN) CO Ltd
Priority date: 2008-10-29
Filing date: 2008-10-29
Publication date: 2009-08-19
Anticipated expiration: 2018-10-29

Abstract

The utility model relates to a frame oil seal with a waved outer wall, which comprises a frame and a rubber body wrapped on the frame, wherein the outer wall of the frame oil seal is formed by the peripheral surface of the rubber body and is axially provided with at least two circular protruding ribs at intervals, and circular grooves are respectively formed among the protruding ribs so that the outer wall of the axial cross section of the frame oil seal is waved. The frame oil seal with the waved outer wall solves the problems that the outer wall of the prior frame oil seal in interference fit with a mounting hole is in a compressed state for a long time, generates rebound, causes rubber to permanently deform and age and thus shortens the service life of the frame oil seal.

Description

Waveform outer wall outside framework oil seal

Technical field

The utility model relates to the seal element of automobile, motorcycle, machinery, relates in particular to a kind of waveform outer wall outside framework oil seal, is meant a kind of C form outside framework oil seal of waveform outer wall especially.

Background technique

Oil sealing also can be described as rotary shaft lip seal, is indispensable seal element in the power equipment, and the quality of oil sealing quality and performance is directly connected to sealing, Security and the reliability of machine.

The outside framework oil seal that often uses is the C form at present, promptly coats skeleton by rubber and constitutes, and the outer wall of outside framework oil seal all is a rubber.As shown in Figure 1, C form outside framework oil seal mainly is made up of rubber body 1, skeleton 2 and spring 3, and skeleton 2 is embedded in the rubber body 1, and the outer wall of this outside framework oil seal is cylndrical surface 9.When assembling was used, outside framework oil seal and pilot hole interference fit made its cylndrical surface 9 fit tightly with pilot hole, keep outside framework oil seal to be anchored in the pilot hole.The magnitude of interference of cylndrical surface 9 is set according to the specification size of oil sealing and use occasion, and generally between 0.15～0.6mm, the spring-back force of the magnitude of interference by cylndrical surface 9 and rubber body 1 self obtains the sealing impacting force, to reach the effect that cylndrical surface 9 seals.Be pressed into end in the assembling of outside framework oil seal and also be provided with the guiding conical surface 4, so that outside framework oil seal is pressed into pilot hole.

Above-mentioned outside framework oil seal uses for a long time, but facts have proved that still there is deficiency in it.Trace it to its cause mainly is because the outer wall of outside framework oil seal is the cylndrical surface rubber ring, outside framework oil seal is when assembling, its outer wall surface produces relative friction with pilot hole, friction factor is bigger, and after it was pressed into pilot hole, the cylndrical surface rubber ring was under the compressive state and produces resilience, again because the outside framework oil seal outer wall is the cylndrical surface, the space that does not hold rubber deformation clout when being pressed into makes outside framework oil seal produce resilience after assembling a period of time and extrudes desirable rigging position.In addition, in use, the cylndrical surface rubber ring is in compressed state for a long time, is easy to generate permanent deformation, aggravates the aging of rubber ring, thereby shortens the working life of outside framework oil seal.

Therefore, the utility model provides a kind of waveform outer wall outside framework oil seal, to remedy deficiency of the prior art from improving the prior art angle.

Summary of the invention

The utility model provides a kind of waveform outer wall outside framework oil seal, its purpose mainly is after solving existing outside framework oil seal and pilot hole interference fit, its outer wall is in confined state for a long time and produces resilience, and rubber produces permanent deformation, aging, thereby shortens the outside framework oil seal problem in working life.

For achieving the above object, the technical solution adopted in the utility model is: a kind of waveform outer wall outside framework oil seal, comprise skeleton and be coated on rubber body on the skeleton, the outer ring face of rubber body forms the outer wall of outside framework oil seal, at least two annular convex ribs apart are set on the described outer wall vertically, form annular groove between each annular convex rib, make the outer wall waviness of outside framework oil seal axial cross section with this.

Related content in the technique scheme is explained as follows:

1, in the such scheme, an end of described outer wall is provided with along end face and inwardly is provided with the location anchor ring and the guiding conical surface successively, and described location anchor ring is the cylndrical surface.Wherein, described " end of outer wall " refers to the be pressed into end of outside framework oil seal in when assembling.The location anchor ring plays positioning action when assembling, outside framework oil seal is pressed in the pilot hole along axial direction.The guiding conical surface plays leading role when pressing down assembling, be convenient to assembling.

2, in the such scheme, described at least two annular convex ribs at a distance of setting are equivalent to a plurality of O ring seal rings, fit tightly with the pilot hole inwall, play good seal action, the clout of rubber deformation when described annular groove is pressed into assembling in order to hold outside framework oil seal, thereby reduce the resilience of assembling back skeleton oil sealing, make outside framework oil seal be in correct rigging position.The cross section of described annular convex rib and annular groove is arc.

Because the technique scheme utilization, the utility model compared with prior art advantage is:

1, because the utility model is provided with at least two annular convex ribs vertically apart on the outer wall of outside framework oil seal, this annular convex rib is equivalent to a plurality of O ring seal rings, after the assembling, fit tightly with the pilot hole inwall, play good seal action, the clout of rubber body deformation when the annular groove that forms between each annular convex rib is pressed into assembling in order to hold outside framework oil seal, thus the resilience of assembling the back skeleton oil sealing reduced, make outside framework oil seal be in correct rigging position.When guaranteeing sealability, reduce the decrement of rubber, thereby keep the elasticity of rubber, prolonged the working life of outside framework oil seal.

2, because being pressed into end in the assembling of outside framework oil seal outer wall, the utility model inwardly is disposed with the location anchor ring and the guiding conical surface from the end, make this outside framework oil seal when assembling is pressed into, accurate positioning, easy to assembly guarantees that effectively outside framework oil seal is in correct rigging position.

Description of drawings

Accompanying drawing 1 is existing outside framework oil seal axial cross section schematic representation;

Accompanying drawing 2 is the utility model axial cross section schematic representation.

In the above accompanying drawing: 1, rubber body; 2, skeleton; 3, spring; 4, the guiding conical surface; 5, location anchor ring; 6, waveform; 7, annular convex rib; 8, annular groove; 9, cylndrical surface.

Embodiment

Below in conjunction with drawings and Examples the utility model is further described:

Embodiment:

As shown in Figure 2, a kind of waveform outer wall outside framework oil seal, comprise skeleton 2 and be coated on rubber body 1 on the skeleton 2, the outer ring face of rubber body 1 forms the outer wall of outside framework oil seal, at least two annular convex ribs 7 apart are set on the described outer wall vertically, form annular groove 8 between each annular convex rib 7, make the outer wall waviness 6 of outside framework oil seal axial cross section with this.

The assembling of outside framework oil seal outer wall is pressed into to hold to be provided with along end face and inwardly is provided with the location anchor ring 5 and the guiding conical surface 4 successively.Described location anchor ring 5 is the cylndrical surface, plays the role of positioning when assembling, and outside framework oil seal is pressed in the pilot hole along axial direction.The guiding conical surface 4 plays leading role when pressing down assembling, be convenient to assembling.

Because the utility model is provided with at least two annular convex ribs 7 vertically apart on the outer wall of outside framework oil seal, this annular convex rib 7 is equivalent to a plurality of O ring seal rings, after the assembling, fit tightly with the pilot hole inwall, play good seal action. the clout of rubber body deformation when the annular groove 8 that forms between each annular convex rib 7 is pressed into assembling in order to hold outside framework oil seal, thereby reduce the resilience of assembling back skeleton oil sealing, make outside framework oil seal be in correct rigging position.When guaranteeing sealability, reduce the decrement of rubber, thereby keep the elasticity of rubber, prolonged the working life of outside framework oil seal.

The foregoing description only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the personage who is familiar with this technology can understand content of the present utility model and enforcement according to this, can not limit protection domain of the present utility model with this.All equivalences of being done according to the utility model spirit change or modify, and all should be encompassed within the protection domain of the present utility model.

Claims

1, a kind of waveform outer wall outside framework oil seal, comprise skeleton (2) and be coated on rubber body (1) on the skeleton (2), the outer ring face of rubber body (1) forms the outer wall of outside framework oil seal, it is characterized in that: at least two annular convex ribs (7) apart are set on the described outer wall vertically, form annular groove (8) between each annular convex rib (7), make the outer wall waviness (6) of outside framework oil seal axial cross section with this.

2, waveform outer wall outside framework oil seal according to claim 1 is characterized in that: an end of described outer wall is provided with along end face and inwardly is provided with the location anchor ring (5) and the guiding conical surface (4) successively, and described location anchor ring (5) is the cylndrical surface.