阅读说明：本技术 一种轴套及盒式油封 (Shaft sleeve and box-type oil seal ) 是由 钟勤俭 于 2020-06-03 设计创作，主要内容包括：本发明公开了一种轴套及盒式油封,包括：直管,外表面具有肩部；环形架,套装于所述直管的外侧,端面与所述肩部抵接；第一橡胶体,具有贴合所述直管的内表面的第一橡胶部、贴合所述环形架靠近所述肩部一侧的第二橡胶部、贴合所述直管的外表面并且连接所述第一橡胶部和所述第二橡胶部的第三橡胶部。本发明的一种轴套及盒式油封,能够提高轴套强度,减少变形,确保密封效果。(The invention discloses a shaft sleeve and box type oil seal, comprising: a straight tube having a shoulder on an outer surface; the annular frame is sleeved on the outer side of the straight pipe, and the end face of the annular frame is abutted to the shoulder; the first rubber body is provided with a first rubber part attached to the inner surface of the straight pipe, a second rubber part attached to one side, close to the shoulder, of the annular frame, and a third rubber part attached to the outer surface of the straight pipe and connected with the first rubber part and the second rubber part. The shaft sleeve and the box-type oil seal can improve the strength of the shaft sleeve, reduce deformation and ensure the sealing effect.)

1. A bushing, comprising:

a straight tube (100) having a shoulder (110) on an outer surface thereof;

the annular frame (120) is sleeved on the outer side of the straight pipe (100), and the end face of the annular frame is abutted to the shoulder (110);

the first rubber body (130) is provided with a first rubber part (140) attached to the inner surface of the straight pipe (100), a second rubber part (150) attached to one side, close to the shoulder part (110), of the annular frame (120), and a third rubber part (160) attached to the outer surface of the straight pipe (100) and connecting the first rubber part (140) and the second rubber part (150).

2. Bushing according to claim 1, wherein the first rubber part (140) is provided with a first end lip (170), the first end lip (170) being arranged obliquely towards the straight tube (100).

3. A bushing according to claim 1, wherein a first radial lip (180) is arranged at the connection of the first rubber part (140) and the third rubber part (160), the first radial lip (180) is inclined away from the straight pipe (100), and the first radial lip (180) is used for abutting against the second ring (200) of the cartridge type oil seal.

4. A sleeve according to claim 3, wherein at least one end of said straight tube (100) protrudes outside the cartridge seal.

5. Bushing according to claim 1, wherein the annular frame (120) is welded to the straight tube (100).

6. Bushing according to claim 1, wherein the first rubber body (130) is adhesively fixed to the annular frame (120) and to the straight tube (100).

7. Bushing according to claim 1, wherein the first rubber body (130) covers the radially outer surface of the annular frame (120).

8. A box type oil seal is characterized by comprising a first ring (190), a second ring (200) and a shaft sleeve according to any one of claims 1 to 7, wherein the first ring (190) and the second ring (200) are sleeved on the straight pipe (100), the annular frame (120) is accommodated between the first ring (190) and the second ring (200), the first ring (190) is located on the side, opposite to the shoulder (110), of the annular frame (120), and the second ring (200) is located on the side, close to the shoulder (110), of the annular frame (120).

9. The box type oil seal according to claim 8, wherein the first ring (190) is coated with a second rubber body (250), the second rubber body (250) is provided with a second radial lip (210) abutting against the outer surface of the straight pipe (100), a second end face lip (220) abutting against the annular frame (120), and a positioning rib (230) abutting against the edge of the annular frame (120), and the positioning rib (230) is arranged on one side of the second end face lip (220) far away from the straight pipe (100).

10. A cartridge oil seal according to claim 8, wherein the first ring (190) is provided with an external bead (240), the external bead (240) clamping the edge of the second ring (200) for fixation.

Technical Field

The invention relates to an oil seal structure, in particular to a shaft sleeve and a box-type oil seal.

Background

Agricultural machinery is equipment specially used for agricultural production. Due to the wide variety of geographical environments, agricultural machinery is complex and harsh to work and is susceptible to impact loads, such as accidental impacts, stone touch, and the like.

In order to protect the bearings of agricultural machinery, cassette type oil seals have been designed.

Structurally, the box-type oil seal is provided with a shaft sleeve, a first ring and a second ring which are oppositely arranged.

Wherein, the suit that first ring and second ring rotate is sheathe in the axle sleeve, and first ring is fixed with the second ring to, form the lubrication chamber between first ring and the second ring.

Meanwhile, the shaft sleeve is formed by stamping a metal plate and is provided with a pipe body and a radial folded edge positioned at one end of the pipe body, the radial folded edge is positioned in the lubricating cavity, and the radial folded edge is in contact lubrication with grease in the lubricating cavity.

In addition, the shaft sleeve, the first ring or the second ring can be coated with a rubber body, so that gaps are made up, and sealing is ensured.

However, in use, the shaft sleeve is easy to deform, and further, the rubber body is driven to deform, so that the sealing effect is influenced.

Disclosure of Invention

The invention aims to solve at least one technical problem in the prior art, and provides a shaft sleeve and a box-type oil seal, which can improve the strength of the shaft sleeve, reduce deformation and ensure the sealing effect.

The invention is realized by the following technical scheme:

in a first aspect of the present invention, there is provided a shaft sleeve, including: a straight tube having a shoulder on an outer surface; the annular frame is sleeved on the outer side of the straight pipe, and the end face of the annular frame is abutted to the shoulder; the first rubber body is provided with a first rubber part attached to the inner surface of the straight pipe, a second rubber part attached to one side, close to the shoulder, of the annular frame, and a third rubber part attached to the outer surface of the straight pipe and connected with the first rubber part and the second rubber part.

According to the shaft sleeve of the first aspect of the present invention, the first rubber portion is provided with a first end face lip, and the first end face lip is arranged to be inclined toward a direction approaching the straight pipe.

According to the shaft sleeve in the first aspect of the present invention, a first radial lip is disposed at a connection portion of the first rubber portion and the third rubber portion, the first radial lip is disposed to be inclined in a direction away from the straight pipe, and the first radial lip is configured to abut against a second ring of the cartridge oil seal.

According to the shaft sleeve of the first aspect of the present invention, at least one end of the straight pipe projects to the outside of the cartridge type oil seal.

According to the shaft sleeve of the first aspect of the present invention, the annular frame is welded and fixed to the straight pipe.

According to the shaft sleeve of the first aspect of the present invention, the first rubber body is bonded and fixed to the annular frame and the straight pipe.

According to a bushing according to a first aspect of the invention, the first rubber body covers a radially outer surface of the annular frame.

The first aspect of the invention provides a box-type oil seal, which comprises a first ring, a second ring and the shaft sleeve, wherein the first ring and the second ring are sleeved on the straight pipe, the annular frame is accommodated between the first ring and the second ring, the first ring is positioned on one side of the annular frame, which is back to the shoulder, and the second ring is positioned on one side of the annular frame, which is close to the shoulder.

According to the box type oil seal of the second aspect, the first ring is coated with the second rubber body, the second rubber body is provided with the second radial lip which abuts against the outer surface of the straight pipe, the second end face lip which abuts against the annular frame and the positioning rib which abuts against the edge of the annular frame, and the positioning rib is arranged on one side, away from the straight pipe, of the second end face lip.

According to a cartridge type oil seal of a second aspect of the present invention, the first ring is provided with an outer bead which clamps an edge of the second ring to be fixed.

Has the advantages that: compared with the prior art, the shaft sleeve and the box-type oil seal are provided with the straight pipe and the annular frame, so that the shaft sleeve is formed by the straight pipe, the annular frame and the first rubber body, a metal plate stamping process is not needed for manufacturing the shaft sleeve, and further, the straight pipe and the annular frame can be manufactured by high-strength materials, so that the strength is improved, the first rubber body is supported powerfully, the deformation is reduced, and the sealing effect is ensured.

Meanwhile, the shaft sleeve is not manufactured by adopting a sheet metal stamping process, so that the thickness of the straight pipe is not limited, and the end face of the straight pipe can be used for bearing, and the axial load bearing capacity is improved.

Meanwhile, the first ring and the second ring of the box-type oil seal can still be manufactured by adopting a sheet metal stamping process, the influence of a shaft sleeve manufacturing process is avoided, and the manufacturing cost is reduced.

Drawings

The invention is further described below with reference to the accompanying drawings and examples;

fig. 1 is a schematic structural view of a cartridge type oil seal of the present invention;

FIG. 2 is a schematic structural view of the bushing of FIG. 1;

FIG. 3 is a schematic view of the first ring of FIG. 1;

fig. 4 is a schematic view of the structure of the second ring of fig. 1.

Reference numerals: 100-straight pipe, 110-shoulder, 120-annular frame, 130-first rubber body, 140-first rubber part, 150-second rubber part, 160-third rubber part, 170-first end face lip, 180-first radial lip, 190-first ring, 200-second ring, 210-second radial lip, 220-second end face lip, 230-positioning rib, 240-external curled edge and 250-second rubber body.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.