CN200943703Y

CN200943703Y - Box type oil seal

Info

Publication number: CN200943703Y
Application number: CNU2006200874321U
Authority: CN
Inventors: 张万明
Original assignee: QINGDAO HILYWILL SEALING CO Ltd
Current assignee: Qingdao Hilywill Advanced Materials Technology Co., Ltd.
Priority date: 2006-07-28
Filing date: 2006-07-28
Publication date: 2007-09-05
Anticipated expiration: 2016-07-28

Abstract

The utility model provides a cassette oil seal, which can solve problems including the assembly difficulties between oil seal and shaft, oil seal leakage, quick wearing, poor reliability, and service life decrease, etc. in the existing technology. The identity lies in the installation of the inner bushings suiting with the shaft of the gear box in the rubber seal inner ring. The installation of the inner bushings in the rubber seal inner ring assembles the shaft of the gear box with the inner bushing together. The shaft transitional or interferential fits the inner bushings. The lip of the rubber seal forms an airproof with the outer layer of the inner bushings. The rubber does not contact with the shaft directly, thereby eliminating the oil seal injury caused by the flaws of the shaft, reducing oil leakage, slow down the wearing rate, and improving the reliability. Experimental test shows that service life has been raised to 1000 hours or so.

Description

The boxlike oil sealing

Technical field

The utility model oil sealing is specifically to the improvement of the oil seal structure of existing automotive gearbox.

Background technique

The oil sealing of existing automotive gearbox is by inner frame, outer skeleton and be inlaid in rubbery sealed body on the outer skeleton etc. and form, and has lip on rubbery sealed body and the axle surface of contact, and lip fits tightly axis body, to reach the effect of sealing.Because rubbery sealed body is on the direct set gear case axle, and the difference of the chamfering of axle head, axis body degree of finish, tolerance fit, and factor such as burr, can make rubbery sealed body lip and axis body that difficulty is installed, turn over lip position and axis body bad connection, even can damage lip, and difficulty is installed, high to workman's level of skill requirement.When having above-mentioned undesirable element, during gear-box work, oil leakage phenomenon can appear, the wearing and tearing aggravation, poor reliability, descend to working life, and through producer's feedback opinion, working life was about 240 hours.Form above-mentioned bad phenomenon, actually or axis body problem oil sealing problem, can cause gear-box manufacturer and oil sealing manufacturer to be difficult to distinguish responsibility, shift responsibility onto others mutually, user vehicle has been brought to a certain degree loss.

How solving the deficiency of above-mentioned existence, then is the design problem that the utility model faced.

Summary of the invention

The utility model provides a kind of boxlike oil sealing, and it can solve oil sealing and the axis body assembling difficulty that prior art exists, oil sealing easy oil leakage, quick abrasion, poor reliability, degradation problem under working life.

In order to reach the problem that solves above-mentioned existence, the technical solution of the utility model is, a kind of boxlike oil sealing, it comprises inner frame, outer skeleton and is contained in rubber oil sea on the outer skeleton, it is characterized in that adding and the axis body of the gear-box internal axle sleeve of suit mutually at the rubber oil sea inner ring.

In the utility model, also have following technical characteristics: described internal axle sleeve comprises sleeve body and cirque body, and sleeve body and cirque body are integral types, and the axis body of gear-box and the sleeve body of internal axle sleeve be suit mutually.

In the utility model, also have following technical characteristics: inner frame is contained on the sleeve body of internal axle sleeve near the axis body end, be provided with several attachment posts by circumferencial direction on the rubber oil sea of the cirque body back side correspondence of internal axle sleeve, connecting cylinder is contained in the rubber oil sea body, the attachment post upper end is inserted in the cirque body, there is a circle flange cirque body outer ring, and the rubber oil sea outside flange has a circle rib, and described rib is enclosed within the flange outside.

In the utility model, also have following technical characteristics: described attachment post is made by teflon.

In the utility model, also have following technical characteristics: the axis body surface has zinc coat in described.

In the utility model, also have following technical characteristics: rubber oil sea comprises lip, spring, is coated with lithium grease, rib and shirt rim, and the lip of rubber oil sea, the outer wall that is coated with lithium grease and rib and internal axle sleeve form sealing surface.

The utility model compared with prior art has the following advantages and good effect: 1. the rubber oil sea inner ring adds internal axle sleeve, the axis body and the internal axle sleeve of gear-box are fitted together, axis body and internal axle sleeve are transition or interference fit, the lip of rubber oil sea and internal axle sleeve outer wall form sealing, and rubber oil sea does not directly contact with axis body, thereby eliminate the oil sealing damage that causes because of the axis body self-defect, thereby reduced leakage of oil, the rate of wear slows down, reliability improves, and is increased to about 1000 hours working life through experimental tests.2. because internal axle sleeve is a steel bushing, install easily with the axis body of gear-box.3. the location of location, attachment post and the internal axle sleeve by inner frame and internal axle sleeve, and the rib of rubber oil sea is to the coating of flange, can internal axle sleeve installs stablely, and it is appropriate that internal axle sleeve and rubber oil sea are fitted, and helps improving sealing effect.4. the internal axle sleeve plating zinc on surface has improved degree of finish, forms good fitting surface with axis body, and can improve wear resistance.5. because rubber oil sea does not directly contact with axis body, and the very easy axis body or the reason of oil sealing found out that break down is easy to distinguish responsibility, reduce the time of analyzing and investigate failure cause, improved efficient.

Description of drawings

Below in conjunction with drawings and Examples the utility model is described in detail.

Fig. 1 is the whole-cutaway view of the utility model boxlike oil sealing;

Fig. 2 is the plan view of the utility model boxlike oil sealing;

Fig. 3 is the half sectional view of the utility model boxlike oil sealing;

Fig. 4 is an I position enlarged view among Fig. 3.

1. boxlike oil sealing; 2. inner frame; 3. outer skeleton; 4. rubber oil sea; 4-1. lip; 4-2. spring; 4-3. be coated with lithium grease; 4-4. rib; 4-5. shirt rim; 5. internal axle sleeve; 5-1. axle sleeve; 5-2. cirque body; 5-2-1. flange; 6. attachment post.

Embodiment

Referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4,, thereby there are deficiencies such as leakage of oil, working life be low because prior art is that axis body is directly assembled mutually with rubber oil sea.In order to overcome these deficiencies, design concept of the present utility model is, adds and the axis body of the gear-box internal axle sleeve 5 of suit mutually at rubber oil sea 4 inner rings.

Internal axle sleeve 5 comprises sleeve body 5-1 and cirque body 5-2, and there is a circle flange 5-2-1 cirque body 5-2 outer ring, and sleeve body 5-1 and cirque body 5-2 are integral types, and adopt 45 ^#Steel is made and plating zinc on surface.The part of sleeve body 5-1, cirque body 5-2 and flange 5-2-1 and the rubber oil sea 4 common sealing surfaces that form.

Rubber oil sea 4 comprises lip 4-1, spring 4-2, is coated with lithium grease 4-3, rib 4-4 and shirt rim 4-5 etc.Lip 4-1 and spring 4-2 mainly play seal action, are coated with lithium grease 4-3 and play effects such as pre-lubrication and minimizing dry friction.

Inner frame 2 is inserted on the sleeve body 5-1 of internal axle sleeve 5 near the axis body end, thereby forms the location at this position; Be provided with several attachment posts 6 by circumferencial direction on the rubber oil sea 4 of the cirque body 5-2 back side correspondence of internal axle sleeve 5, in the present embodiment, have 8 attachment posts 6, attachment post 6 bodies are contained in rubber oil sea 4 bodies, attachment post 6 upper ends are inserted in the cirque body 5-2, cirque body 5-2 is drilled with shallow bore hole, attachment post 6 upper ends are inserted in the shallow bore hole, not shown, there is a circle flange 5-2-1 cirque body 5-2 outer ring, rubber oil sea 4 outside flange 5-2-1 has a circle rib 4-4, and rib 4-4 is enclosed within flange 5-2-1 outside and forms coating.

Attachment post 6 is made by teflon, has not only guaranteed intensity but also connect reliable.

During installation, the axis body of gear-box is inserted into the axle sleeve 5-1 place of internal axle sleeve 5, adopts interference fit.And the lip 4-1 of rubber oil sea 4, the outer wall that is coated with lithium grease 4-3 and rib 4-4 and internal axle sleeve 5 form effective sealing surface, in case leakage of oil.Line shaft does not directly contact with rubber oil sea 4 like this, has improved working life.

The above, it only is preferred embodiment of the present utility model, be not to be the restriction of the utility model being made other form, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every technical solutions of the utility model content that do not break away to any simple modification, equivalent variations and remodeling that above embodiment did, still belongs to the protection domain of technical solutions of the utility model according to technical spirit of the present utility model.

Claims

1. boxlike oil sealing, it comprises inner frame, outer skeleton and is contained in rubber oil sea on the outer skeleton, it is characterized in that adding and the axis body of the gear-box internal axle sleeve of suit mutually at the rubber oil sea inner ring.

2. boxlike oil sealing according to claim 1 is characterized in that described internal axle sleeve comprises sleeve body and cirque body, and sleeve body and cirque body are integral types, and the axis body of gear-box and the sleeve body of internal axle sleeve be suit mutually.

3. boxlike oil sealing according to claim 2, it is characterized in that inner frame is contained on the sleeve body of internal axle sleeve near the axis body end, be provided with several attachment posts by circumferencial direction on the rubber oil sea of the cirque body back side correspondence of internal axle sleeve, connecting cylinder is contained in the rubber oil sea body, the attachment post upper end is inserted in the cirque body, there is a circle flange cirque body outer ring, and the rubber oil sea outside flange has a circle rib, and described rib is enclosed within the flange outside.

4. boxlike oil sealing according to claim 3 is characterized in that described attachment post made by teflon.

5. according to the described boxlike oil sealing of any claim in the claim 1 to 4, it is characterized in that described interior axis body surface has zinc coat.

6. boxlike oil sealing according to claim 5 is characterized in that rubber oil sea comprises lip, spring, is coated with lithium grease, rib and shirt rim, and the lip of rubber oil sea, the outer wall that is coated with lithium grease and rib and internal axle sleeve form sealing surface.