CN219529823U

CN219529823U - Enclasping oil seal

Info

Publication number: CN219529823U
Application number: CN202223549408.3U
Authority: CN
Inventors: 蒋敏弟
Original assignee: Kunshan Ironeagle Rubber Products Co ltd
Current assignee: Kunshan Ironeagle Rubber Products Co ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-08-15
Anticipated expiration: 2032-12-29

Abstract

The utility model discloses a clasping oil seal, which comprises an elastic ring and wear-resistant pieces, wherein the elastic ring is provided with a plurality of wear-resistant pieces at intervals along the circumferential direction of the elastic ring, and the surfaces of the wear-resistant pieces clasp the anvil of an electric hammer at the same time; the surface of the wear-resistant piece and the surface of the anvil are in line contact, surface contact or point contact; the elastic ring is a rubber ring; the wear-resistant piece is a wear-resistant plastic piece or a wear-resistant metal piece. The enclasping oil seal has the characteristics of impact resistance, high temperature resistance, wear resistance and the like, and can greatly prolong the service life of the oil seal.

Description

Enclasping oil seal

Technical Field

The utility model belongs to the technical field of sealing structures, and particularly relates to an oil seal.

Background

The electric hammer is an electric rotary hammer drill with a safety clutch and a pneumatic hammering mechanism. The electric hammer uses the principle of piston movement, the compressed gas impacts the anvil (or hammer), the head of the anvil impacts the tail of the drill bit, and 6-100mm holes can be formed in hard materials such as concrete, bricks, stones and the like, so that the electric hammer has higher hole forming efficiency on the materials.

An annular anvil guide block is arranged in a main shaft sleeve of the electric hammer, a sealing ring is arranged on the inner wall surface of the anvil guide block, the anvil is arranged in the main shaft sleeve, the end part of the anvil can extend into the sealing ring, and when the electric hammer works, the anvil moves in the main shaft sleeve in an axial reciprocating manner, and at the moment, contact friction is generated on the sealing ring; when the electric hammer idles, the anvil cannot axially move, and the sealing ring also plays a role of holding the anvil tightly when the electric hammer idles. In the prior art, a conventional rubber O-shaped ring is adopted, and when 500-1000O-shaped rings are drilled, the O-shaped rings are worn seriously, the holding force is lost, and the normal operation of the electric hammer is seriously affected. That is, the existing O-shaped ring can play a role in elastic impact resistance and heat resistance, but is not wear-resistant and has short service life.

Disclosure of Invention

The utility model mainly solves the technical problem of providing the clasping oil seal, which has the characteristics of impact resistance, high temperature resistance, wear resistance and the like and can greatly prolong the service life of the oil seal.

In order to solve the technical problems, the utility model adopts a technical scheme that: the utility model provides a clasping oil seal, which comprises an elastic ring and wear-resistant pieces, wherein the elastic ring is provided with a plurality of wear-resistant pieces at intervals along the circumferential direction of the elastic ring, and the surfaces of the wear-resistant pieces clasp the anvil of an electric hammer at the same time;

the surface of the wear-resistant piece and the surface of the anvil are in line contact, surface contact or point contact;

the elastic ring is a rubber ring;

the wear-resistant piece is a wear-resistant plastic piece or a wear-resistant metal piece.

Further, the wear-resistant part is a spherical part, the elastic ring is an integrated part, a plurality of spherical grooves are formed in the inner wall surface of the rubber ring, and the wear-resistant part is installed in the spherical grooves.

Further, the wear-resistant piece is rotatably connected with the rubber ring.

Further, an avoidance groove is formed in the outer wall surface of the elastic ring, and the position of the avoidance groove is radially opposite to that of the spherical groove.

Further, the wear-resistant piece is an arc-shaped block, and the arc-shaped block is in line contact or surface contact with the anvil.

Further, the arc-shaped block and the elastic ring are integrally vulcanized and formed;

or the inner wall surface of the elastic ring is provided with an arc-shaped groove, and the arc-shaped block is arranged in the arc-shaped groove;

or the arc-shaped block is provided with a clamping groove, and the clamping groove is clamped into the rubber ring.

Further, an avoidance groove is formed in the outer wall surface of the elastic ring, and the position of the avoidance groove is radially opposite to that of the arc-shaped block.

Further, the wear-resistant plastic parts are PEEK (polyether ether ketone) parts, PAEK (polyaryl ether ketone) parts, UHMW-PE (ultra high molecular weight polyethylene wear-resistant pipe) parts, HMW-PE (high molecular weight polyethylene) parts and PTFE (polytetrafluoroethylene) parts. (but not limited thereto, other hard polymer materials may be used

Further, the rubber ring is an FKM (fluororubber) ring or an HNBR (hydrogenated nitrile rubber) ring.

The beneficial effects of the utility model are as follows:

the elastic ring is in contact with the surface of the anvil in a mode of matching with the wear-resistant piece, the wear-resistant piece is in contact with the surface of the anvil, the elastic ring is a rubber ring, the rubber is elastic and resistant to high temperature, the wear-resistant piece has strong wear resistance, the wear-resistant piece mainly provides acting force for holding the anvil tightly, the wear-resistant piece is in direct contact with the anvil, the wear-resistant effect is achieved, the wear amount is small in the axial reciprocating motion process of the anvil, and the service life of the oil seal is greatly prolonged;

the wear-resistant member can be a spherical member, and the wear-resistant member is rotationally connected with the rubber ring, in the structure, the spherical member can rotate in the spherical groove, so that different points of the whole spherical surface can be contacted with the outer surface of the anvil, and compared with the situation that the spherical member does not rotate, the wear of a certain fixed point is relatively slowed down, and the service life of the wear-resistant member is further prolonged.

The foregoing description is only an overview of the present utility model, and is intended to provide a better understanding of the present utility model, as it is embodied in the following description, with reference to the preferred embodiments of the present utility model and the accompanying drawings.

Drawings

Fig. 1 is a schematic structural view of embodiment 1 of the present utility model;

fig. 2 is a schematic structural view of embodiment 2 of the present utility model;

FIG. 3 is a top view of embodiment 2 of the present utility model;

fig. 4 is a schematic structural view of embodiment 3 of the present utility model;

FIG. 5 is a top view of embodiment 3 of the present utility model;

fig. 6 is a schematic structural view of embodiment 4 of the present utility model;

fig. 7 is a schematic structural view of an arc block of embodiment 4 of the present utility model;

Detailed Description

The following specific embodiments of the utility model are described in order to provide those skilled in the art with an understanding of the present disclosure. The utility model may be embodied in other different forms, i.e., modified and changed without departing from the scope of the utility model.

Example 1: the enclasping oil seal is shown in figure 1, and comprises an elastic ring 1 and wear-resistant pieces, wherein the elastic ring is provided with a plurality of wear-resistant pieces at intervals along the circumferential direction of the elastic ring, and the surfaces of the wear-resistant pieces enclasp an anvil of an electric hammer at the same time;

the wear-resistant piece is in point contact with the surface of the anvil;

the elastic ring is a rubber ring;

the wear-resistant member is a wear-resistant plastic member or a wear-resistant metal member (such as, but not limited to, a steel member).

Principle of: the elastic ring is in contact with the surface of the anvil, the elastic ring is a rubber ring, the rubber is elastic and resistant to high temperature, the abrasion resistant member has strong abrasion resistance, the abrasion resistant member mainly provides acting force for holding the anvil, the abrasion resistant member is in direct contact with the anvil, the abrasion resistant effect is achieved, the abrasion loss is small in the axial reciprocating motion process of the anvil, and the service life of the oil seal is greatly prolonged.

The wear-resisting part is a spherical part 21, the elastic ring is an integrated part, a plurality of spherical grooves are formed in the inner wall surface of the rubber ring, and the wear-resisting part is installed in the spherical grooves. In this embodiment, the wear member is in point contact with the anvil.

Preferably, the wear-resistant piece is rotatably connected with the rubber ring. In this structure, the ball can rotate in the spherical recess, can make the different points of whole sphere contact with the surface of anvil, compares under the not condition of ball, slows down the wearing and tearing volume of a certain fixed point relatively, further prolongs its life.

The wear-resistant plastic parts are PEEK (polyether ether ketone) parts, PAEK (polyarylether ketone) parts, UHMW-PE (ultra-high molecular weight polyethylene wear-resistant pipe) parts, HMW-PE (high molecular weight polyethylene) parts and PTFE (polytetrafluoroethylene) parts, but the wear-resistant plastic parts are not limited to the PEEK (polyether ether ketone) parts, the PAEK (polyarylether ketone) parts, the UHMW-PE (ultra-high molecular weight polyethylene wear-resistant pipe) parts, the HMW-PE (high molecular weight polyethylene) parts and the PTFE (polytetrafluoroethylene) parts, and other wear-resistant hard high polymer materials can also be used. Preferably, the wear resistant plastic member is a PEEK member.

The rubber ring is an FKM (fluororubber) ring or an HNBR (hydrogenated nitrile rubber) ring, but is not limited thereto.

Example 2: a hug oil seal similar in construction to that of embodiment 1 except that: as shown in fig. 2 and 3, the outer wall surface of the elastic ring is provided with an avoidance groove 11, and the position of the avoidance groove is radially opposite to that of the spherical groove.

The position of radial corresponding spherical recess sets up in this structure and dodges the recess, when assembling the oil blanket to the anvil guide block (the anvil guide block is the annular piece in the main shaft axle sleeve of being fixed in the electric hammer), extrudees the oil blanket with force and assembles it into, dodges the recess and provides the space for the radial outside resilience of wearing part, makes it have better resilience.

Example 3: a hugging oil seal as shown in fig. 4 and 5, which is similar to embodiments 1 and 2 in structure except that: the wear member is an arcuate block 22 in line or surface contact with the anvil, shown as surface contact, if the intermediate position of the inner wall surface of the arcuate block protrudes inwardly.

As shown in fig. 4 and 5, the outer wall surface of the elastic ring is provided with an avoidance groove 11, and the position of the avoidance groove is radially opposite to the position of the arc-shaped block.

In this embodiment, the arc-shaped block and the elastic ring are integrally formed by vulcanization.

Of course, it is also possible to: the inner wall surface of the elastic ring is provided with an arc-shaped groove, and the arc-shaped block is arranged in the arc-shaped groove.

Example 4: a hugging oil seal as shown in fig. 6 and 7, which is similar to embodiment 3 in structure except that: the arc-shaped block is provided with a clamping groove 221, and the clamping groove is clamped into the rubber ring. The assembly process of this embodiment 1 is not convenient in embodiments 1 to 3, because the arc-shaped block is caught on the elastic ring without being pressed, the arc-shaped block is easily dropped from the rubber ring when the oil seal is pressed into the anvil guide block, and the assembly process is inconvenient.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures made by the description of the utility model and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the utility model.

Claims

1. The utility model provides a hug tightly oil blanket which characterized in that: the electric hammer comprises an elastic ring and wear-resistant pieces, wherein the elastic ring is provided with a plurality of wear-resistant pieces at intervals along the circumferential direction of the elastic ring, and the surfaces of the wear-resistant pieces are simultaneously held tightly against an anvil of the electric hammer;

the elastic ring is a rubber ring;

2. A hugging oil seal according to claim 1, wherein: the wear-resisting part is a spherical part, the elastic ring is an integrated part, a plurality of spherical grooves are formed in the inner wall surface of the rubber ring, and the wear-resisting part is installed in the spherical grooves.

3. The hugging oil seal of claim 2, wherein: the wear-resistant piece is rotationally connected with the rubber ring.

4. The hugging oil seal of claim 2, wherein: the outer wall surface of the elastic ring is provided with an avoidance groove, and the position of the avoidance groove is radially opposite to that of the spherical groove.

5. A hugging oil seal according to claim 1, wherein: the wear-resisting piece is an arc-shaped block, and the arc-shaped block is in line contact or surface contact with the anvil.

6. The hugging oil seal of claim 5, wherein: the arc-shaped block and the elastic ring are integrally vulcanized and formed;

7. The hugging oil seal of claim 6, wherein: the outer wall surface of the elastic ring is provided with an avoidance groove, and the position of the avoidance groove is radially opposite to the position of the arc-shaped block.

8. A hugging oil seal according to claim 1, wherein: the wear-resistant plastic parts are PEEK parts, PAEK parts, UHMW-PE parts, HMW-PE parts and PTFE parts.

9. A hugging oil seal according to claim 1, wherein: the rubber ring is FKM ring or HNBR (hydrogenated nitrile butadiene rubber) ring.