CN115111277B

CN115111277B - Multi-cavity sealing universal joint

Info

Publication number: CN115111277B
Application number: CN202211036566.0A
Authority: CN
Inventors: 叶连强; 牛杰; 王珊; 董小忠
Original assignee: Wanxiang Qianchao Co Ltd
Current assignee: Wanxiang Qianchao Co Ltd
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2022-12-06
Anticipated expiration: 2042-08-29
Also published as: CN115111277A

Abstract

The invention relates to the technical field of automobile bearing sealing, in particular to a multi-cavity sealing universal joint. The multi-chamber sealed universal joint comprises a journal of a cross shaft, a bearing sleeve arranged on the journal, an oil seal and a dust cover; the oil seal is arranged between the bearing sleeve and the journal; a first mounting part is arranged on the outer side of the opening end of the bearing sleeve; one end of the dust cover is provided with a first protruding part protruding inwards, and the first protruding part is in interference fit with the first mounting part; the dust shield is in interference fit with the journal; the dust cover and the bearing sleeve surround to form a first cavity. The universal joint bearing sealing performance that has solved general structure is not good, and dustproof effect is poor, can not fine prevention silt, muddy water and dust etc. corrode the bearing, also can not fine prevent simultaneously that the lubricating oil in the bearing from seeing through the oil blanket and leaking to external environment scheduling problem.

Description

Multi-cavity sealing universal joint

Technical Field

The invention relates to the technical field of automobile bearing sealing, in particular to a multi-cavity sealing universal joint.

Background

The universal joint bearing is mostly used in the lower part of an automobile chassis, and generally faces various complex road environments, such as silt, muddy water, dust and the like in use, particularly a pickup, an off-road vehicle type and the like, and often works in a slurry environment with severe working conditions. If silt, muddy water and dust etc. among the external environment invade the universal joint bearing, can directly corrode the oil blanket, lead to the oil blanket wearing and tearing, invade the inside wearing and tearing bearing of bearing even and lead to the universal joint bearing to become invalid. Therefore, the service life of the universal joint bearing is shortened, time delay and energy consumption are reduced, maintenance and repair cost is increased, production is delayed, and driving safety is possibly influenced.

The universal joint bearing of general structure sealing performance is not good, and dustproof effect is poor, can not fine prevention silt, muddy water and dust etc. corrode the bearing, also can not fine prevent simultaneously that lubricating oil in the bearing from permeating the oil blanket and leaking to the external environment in.

Disclosure of Invention

The invention aims to: the multi-cavity sealed universal joint solves the problems that a universal joint bearing with a common structure is poor in sealing performance and poor in dustproof effect, cannot well prevent silt, muddy water, dust and the like from corroding the bearing, and cannot well prevent lubricating oil in the bearing from penetrating through an oil seal to leak to the external environment and the like.

In order to achieve the purpose, the invention adopts the following technical scheme:

a multi-chamber sealed universal joint comprises a journal of a cross shaft, a bearing sleeve arranged on the journal, an oil seal and a dust cover; the oil seal is arranged between the bearing sleeve and the journal; a first mounting part is arranged on the outer side of the opening end of the bearing sleeve; one end of the dust cover is provided with a first protruding part protruding inwards, and the first protruding part is in interference fit with the first mounting part; the dust shield is in interference fit with the journal; the dust cover and the bearing sleeve surround to form a first cavity.

On the basis of the above scheme and as a preferable scheme of the scheme: the axle journal sets up the shaft shoulder, the shaft shoulder includes first straight portion and first transition portion, dust cover tip butt is in first transition portion, first straight portion is close to the bearing housing, the fourth installation department of dust cover with first straight portion interference fit.

On the basis of the above scheme and as a preferable scheme of the scheme: the width W of the first flat portion is less than or equal to the thickness T at the fourth mounting portion of the dust cover.

On the basis of the above scheme and as a preferable scheme of the scheme: the end face of the opening side of the bearing sleeve is in contact with the inner wall of the dust cover; or a second bulge part is arranged on the inner wall of the dust cover and is in contact with the end face of the opening side of the bearing sleeve; the dust cover and the bearing sleeve enclose a first cavity; the dust boot, the oil seal, and the journal enclose a second chamber.

On the basis of the above scheme and as a preferable scheme of the scheme: the oil seal comprises a framework and a lip part; a second mounting part is arranged on the bearing sleeve; the journal further comprises a third mounting portion; the skeleton with second installation department interference fit, the lip with third installation department interference fit.

On the basis of the above scheme and as a preferable scheme of the scheme: the lip comprises a first lip and a second lip, the first lip is in interference fit with the third mounting part, and the second lip is in interference fit with the third mounting part; the first lip, the second lip and the third mounting portion enclose a third chamber.

On the basis of the above scheme and as a preferable scheme of the scheme: the first lip portion extends obliquely toward the shaft shoulder side; the second lip portion extends obliquely toward the bearing housing side.

On the basis of the above scheme and as a preferable scheme of the scheme: the third mounting part comprises a second flat part and a second transition part, and the second transition part is arranged at one end of the second flat part close to the dust cover direction side; the second lip portion is in interference fit with the second straight portion, and the first lip portion is in interference fit with the second transition portion.

On the basis of the above scheme and as a preferable scheme of the scheme: the first lip is provided with a third transition portion adapted to the second transition portion.

On the basis of the above scheme and as a preferable scheme of the scheme: the framework is provided with a flange part bent towards the direction far away from the journal, the flange part is arranged between the bearing sleeve and the dust cover, the flange part, the dust cover and the bearing sleeve enclose a first cavity, and the dust cover, the journal and the oil seal enclose a second cavity.

On the basis of the above scheme and as a preferable scheme of the scheme: and a third boss is arranged on the dust cover and is in contact with the oil seal, and the dust cover and the oil seal enclose a fifth chamber.

On the basis of the above scheme and as a preferable scheme of the scheme: the oil seal is provided with a first groove portion which is arranged on the side of the oil seal in the direction close to the dust cover, and the third bulge portion extends into the first groove portion and is in contact with the first groove portion.

On the basis of the above scheme and as a preferable scheme of the scheme: the third protruding portion is provided with a protruding portion extending towards the first protruding portion, the cross section of the first groove portion is open towards the dust cover, and the protruding portion is in contact with the side, far away from the shaft neck, of the first groove portion.

On the basis of the above scheme and as a preferable scheme of the scheme: and a second groove part is arranged on the side, far away from the dust cover, of the oil seal, and a fourth cavity is defined by the oil seal, the journal and the bearing sleeve.

In order to solve the problems that the universal joint bearing with a common structure has poor sealing performance and dust-proof effect, cannot well prevent silt, muddy water, dust and the like from corroding the bearing, cannot well prevent lubricating oil in the bearing from leaking to the external environment through an oil seal, and the like, the universal joint bearing has the following advantages:

according to the multi-cavity sealed universal joint, the dust cover is arranged, firstly, silt, muddy water, dust and the like are directly prevented from entering the position of the oil seal between the shaft head and the bearing sleeve by the dust cover, and the silt, the muddy water, the dust and the like cannot corrode the oil seal and the bearing. Secondly, if there is the lubricating oil that breaks through the oil blanket also can be blockked by the dust cover, make the lubricating oil can not leak and cause in the external environment. Meanwhile, the condition that lubricating oil leaks in a large quantity to cause abnormal abrasion of the universal joint bearing is prevented.

The multi-chamber sealed universal joint of the invention can contain impurities such as dust in the first chamber and further prevent the dust from breaking through towards the roller. Thereby effectively playing the role of sealing and dust prevention. The universal joint bearing sealing structure provided by the invention has good sealing performance and good dustproof effect.

Drawings

FIG. 1 is a schematic view of a multi-chamber sealed gimbal design of the present invention;

FIG. 2 is an enlarged view of portion A of the present invention;

FIG. 3 is a schematic diagram of a multi-chamber sealed gimbal design incorporating a second protrusion according to the present invention;

FIG. 4 is a schematic view of a multi-chamber sealed joint of the present invention having third protrusions;

FIG. 5 is a schematic view of a multi-chamber sealed gimbal design incorporating a roll-off portion in accordance with the present invention;

FIG. 6 is a cross-sectional schematic view of the dust cap of the present invention;

fig. 7 is a front view of a journal portion of the invention.

In the figure:

100. a journal;

101. a shaft shoulder;

102. a first straight portion;

103. a first transition portion;

104. a second straight portion;

105. a second transition portion;

200. a bearing housing;

201. a first mounting portion;

202. a second mounting portion;

300. a dust cover;

301. a first boss portion;

302. a second boss portion;

303. a third boss;

304. a projection;

305. a fourth mounting portion;

400. oil sealing;

401. a framework;

402. a edging section;

403. a first groove portion;

404. a first lip;

405. a second lip;

406. a second groove portion;

500. a first chamber;

600. a second chamber;

700. a third chamber;

800. a fourth chamber;

900. a fifth chamber.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1 to 7, the multi-chamber sealed universal joint of the present invention includes a journal 100 of a cross shaft, a bearing housing 200 disposed on the journal 100, an oil seal 400, and a dust cover 300; the oil seal 400 is disposed between the bearing housing 200 and the journal 100; the dust cover 300 is close to the opening end of the bearing sleeve 200, a first mounting portion 201 is arranged on the outer side of the bearing sleeve 200, a first protruding portion 301 protruding inwards is arranged at one end of the dust cover 300, the first protruding portion 301 is in interference fit with the first mounting portion 201, the dust cover 300 is in interference fit with the journal 100, and a first cavity 500 is arranged between the dust cover 300 and the bearing sleeve 200.

As can be seen from FIG. 1, the cross axle is provided with four shaft journals 100, the shaft journals 100 of the cross axle are distributed on the cross axle body in a cross shape, each shaft journal 100 comprises a shaft shoulder 101 and a third installation part, each shaft shoulder 101 comprises a first straight part 102 and a first transition part 103, the end part of the dust cover 300 abuts against the first transition part 103, each third installation part comprises a second straight part 104 and a second transition part 105, each shaft journal 100 is provided with a bearing structure formed by a roller, a bearing sleeve 200 and an oil seal 400, the shaft shoulders 101 are provided with the dust cover 300, and the third installation parts are provided with the oil seals 400. Whereas the oil seal 400 of a general universal joint bearing is directly exposed to the environment.

However, in the multi-chamber sealed universal joint of the present invention, the dust cover 300 is provided, and firstly, the dust cover 300 directly prevents silt, muddy water, dust, and the like from entering the position of the oil seal 400 between the shaft head and the bearing sleeve 200, so that the silt, muddy water, dust, and the like cannot erode the oil seal 400, and even cannot erode the bearing. Secondly, if there is grease that breaks through the oil seal 400, the grease is also blocked by the dust cover 300, so that the grease does not leak into the external environment. Meanwhile, the condition that lubricating oil leaks in a large quantity to cause abnormal abrasion of the universal joint bearing is prevented.

As shown in fig. 2 to 5, in the multi-chamber sealed universal joint of the present invention, a first chamber 500 is provided between the dust cap 300 and the bearing housing 200, wherein the first chamber 500 can contain impurities such as dust and further prevent the dust from breaking through in the direction of the roller. Thereby effectively playing the role of sealing and dust prevention. The universal joint bearing sealing structure provided by the invention has good sealing performance and good dustproof effect.

In the embodiment of the present disclosure, as shown in fig. 1 and 7, the journal 100 is provided with a shoulder 101, a first straight portion 102 is provided on a side of the shoulder 101 in a direction close to the bearing housing 200, a first transition portion 103 is provided on a side of the first straight portion 102 in a direction away from the bearing housing 200, and a fourth mounting portion 305 of the dust cover 300 is in interference fit with the first straight portion 102.

2-5, wherein the dust cap 300 is in interference fit with the first flat portion 102, the dust cap 300 is well coupled to the shoulder 101 and can be rigidly coupled by a large interference dimension without relative rotation between the dust cap 300 and the shoulder 101, since the more structures there are clearance fits, the greater the risk of seal leakage and thus the relative securement of the dust cap 300 to the shoulder 101. Only the first boss 301 and the first mounting portion 201 of the bearing sleeve 200 can rotate relatively, so that the risk of sealing leakage is reduced, and the effect of guaranteeing the sealing effect is well achieved.

Wherein the first flat portion 102 facilitates the fitting of the dust cap 300 to the shoulder 101. Wherein can see that diameter gradual increase's first transition portion 103 can prevent that dust cover 300 from taking place the drunkenness towards first fillet structure direction, prevents that operational environment is abominable, and long-term shake environment makes dust cover 300 take place the drunkenness. Since the bearing housing 200 is provided on the other side of the dust cover 300, there is no fear that the dust cover 300 moves toward the bearing housing 200. Meanwhile, the radian of the first transition part 103 can also act on the fourth installation part 305, which is in interference fit with the first straight part 102, of the dust cover 300, so that the interference effect and the sealing effect are enhanced.

In the disclosed embodiment, to ensure that the first transition portion 103 can better constrain the dust cover 300, the width W of the first flat portion 102 is less than or equal to the thickness T at the fourth mounting portion 305 of the dust cover 300.

In some embodiments, the open side end of the bearing housing 200 is in contact with the dust cap 300, the dust cap 300 and the bearing housing 200 enclose a first chamber 500, and the dust cap 300, the oil seal 400 and the journal 100 enclose a second chamber 600. In general, the dust boot 300 is fixed relative to the journal 100, so that dust and other impurities in the external environment can break through the sealing structure between the dust boot 300 and the journal 100. But impurities such as dust are more likely to break through from the relatively movable connection of the first boss 301 and the first mounting portion 201. At this time, the first chamber 500 can receive the foreign substances such as dust and further prevent the foreign substances from breaking through in the roller direction. If impurities such as dust break through the first chamber 500, the second chamber 600 continues to receive and prevent the dust from passing through.

In the disclosed embodiment, as shown in fig. 2, 3, 4 and 6, in order to facilitate the contact of the open-side end surface of the bearing housing 200 with the dust cover 300 for better sealing effect, the dust cover 300 is provided with a second boss 302, and the second boss 302 extends towards the bearing housing 200 and is in surface contact with the open-side end surface of the bearing housing 200. A first cavity 500 is formed between the second lobe 302 and the first lobe 301, and a second cavity 600 is formed between the second lobe 302 and the journal 100.

As shown in fig. 2, the second protruding portion 302 is in the shape of a boss with a thickness increasing toward the bearing sleeve 200, wherein the end surface of the bearing sleeve 200 at the opening side can contact with the second protruding portion 302 in the shape of a boss to form a relatively rotatable sealing structure.

As shown in fig. 3, the second protruding portion 302 is a protruding structure extending toward the bearing sleeve 200, wherein the end surface of the bearing sleeve 200 at the opening side can contact with the second protruding portion 302 to form a sealing structure capable of rotating relatively. And the second protruding portion 302 can be obliquely arranged towards the first protruding portion 301, so that a larger deformation amount can be set when the second protruding portion 302 contacts with the end surface at the opening side of the bearing sleeve 200, and a good sealing effect can be set between the second protruding portion 302 and the end surface at the opening side of the bearing sleeve 200.

In some embodiments, as shown in fig. 5, the oil seal 400 is provided with a framework 401, the framework 401 is in a zigzag shape, the framework 401 is provided with a binding part 402 which is bent away from the journal 100, the binding part 402 is arranged between the bearing housing 200 and the dust cover 300, the binding part 402 is simultaneously in surface contact with the dust cover 300 and the open side end of the bearing housing 200, the binding part 402, the dust cover 300 and the bearing housing 200 enclose a first chamber 500, and the dust cover 300, the journal 100 and the oil seal 400 enclose a second chamber 600. The structure of the frame 401 not only can support the binding part 402 between the bearing housing 200 and the dust cover 300 to play a sealing role, but also can limit the bent binding part 402 to be arranged on the end surface of the opening side of the bearing housing 200 to play a role of convenient assembly, and the binding part 402 can be contacted with the end surface of the opening side of the bearing housing 200 only by embedding the oil seal 400 into the second mounting part 202 during assembly, without extra effort and attention to the assembly size relation between the binding part 402 and the bearing housing 200.

In the embodiment of the present disclosure, the oil seal 400 includes a frame 401 and a lip, the second mounting portion 202 is disposed on the bearing housing 200, the frame 401 is in interference fit with the second mounting portion 202, and the lip is in interference fit with the journal 100. Thereby causing the oil seal 400 to stroke in a sealing arrangement between the bearing housing 200 and the journal 100.

In the disclosed embodiment, the lips include a first lip 404 and a second lip 405, the first lip 404 and the second lip 405 are respectively in interference fit with the journal 100, and the first lip 404, the second lip 405 and the journal 100 enclose a third cavity 700. If impurities such as dust break through the first and

second chambers

500 and 600 and continue to break through in the roller direction, the third chamber 700 can continue to receive and stop the impurities such as dust.

In the embodiment of the present disclosure, the first lip 404 and the second lip 405 extend obliquely to each other such that a V-groove structure is formed between the first lip 404 and the second lip 405, and the V-groove structure opens toward the journal 100. The V-groove structure ensures the accommodating space of the third chamber 700, and the inclination of the first lip 404 and the second lip 405 enables the first lip 404 and the second lip 405 to set a larger deformation amount in cooperation with the journal 100, thereby improving the sealing effect.

In the disclosed embodiment, as shown in FIGS. 2-5 and 7, journal 100 is provided with a second flat portion 104 and a second transition portion 105, the second transition portion 105 is disposed on the side of the second flat portion 104 that is adjacent to dust boot 300, the second lip 405 is angled away from dust boot 300 and is in interference fit with the second flat portion 104, and the first lip 404 is angled adjacent to dust boot 300 and is in interference fit with the second transition portion 105. The second lip 405 is in interference fit with the second straight portion, the sealing effect is good, wherein the first lip 404 inclines towards the direction close to the dust cover 300 and is in interference fit with the second transition portion 105, the sealing effect is enhanced, the oil seal 400 can be supported, and the oil seal 400 is prevented from moving towards the dust cover 300.

In order to enhance the sealing effect of the first lip 404 configured to cooperate with the second transition 105, the first lip 404 is configured with a third transition adapted to the second transition 105 in the disclosed embodiment.

In the embodiment of the present disclosure, the second groove portion 406 is disposed on the side of the oil seal 400 away from the dust cover 300, and the oil seal 400, the journal 100 and the bearing housing 200 enclose a fourth chamber 800. The second groove portion 406 increases the accommodation space of the fourth chamber 800, enabling the fourth chamber 800 to accommodate more lubricating oil.

In the embodiment of the present disclosure, as shown in fig. 4 and 5, the dust cover 300 is provided with a third bulge 303, the third bulge 303 is close to the fourth mounting portion 305 of the dust cover 300 and bulges towards the oil seal 400, the third bulge 303 contacts with the oil seal 400, and the dust cover 300 and the oil seal 400 enclose a fifth chamber 900. Between the third lobe 303 and the journal 100 is a third chamber 700. The fifth chamber 900 is used for accommodating and absorbing the impurities such as dust and the like which break through the first chamber 500, and preventing the impurities such as dust and the like from breaking through toward the roller.

In the embodiment of the present disclosure, the oil seal 400 is provided with the first groove portion 403, the first groove portion 403 is provided on the side of the oil seal 400 in the direction close to the dust cover 300, and the third projecting portion 303 extends into the first groove portion 403 and contacts with the first groove portion 403. By the arrangement of the first groove portion 403, the storage capacity of the third chamber 700 and the fifth chamber 900 can be increased, and the sealing effect between the third protruding portion 303 and the oil seal 400 can be improved.

In the embodiment of the present disclosure, the third protruding portion 303 is provided with a protruding portion 304 extending toward the first protruding portion, the cross section of the first groove portion 403 is a V shape opening toward the dust cover 300, and the protruding portion 304 contacts with the side of the first groove portion 403 away from the journal 100. The abutting contact of protruding portion 304 with the inner wall of first groove portion 403 is inclined contact, so that a larger amount of deformation is provided to protruding portion 304, and a better sealing effect is achieved.

It should be noted that the first chamber 500, the second chamber 600, the third chamber 700 and the fifth chamber 900 do not solely function to unidirectionally receive and prevent impurities such as silt, muddy water and dust in the external environment from entering the bearing. And meanwhile, the lubricating oil in the bearing can be prevented from leaking to the external environment. The function of preventing the lubricating oil from leaking in large quantity to cause abnormal abrasion of the bearing is also achieved. The dust cover 300 and the lip are provided with a certain elasticity, but the material thereof includes but is not limited to rubber material, nylon, copper and the like.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A multi-cavity sealed universal joint is characterized by comprising a journal of a cross shaft, a bearing sleeve arranged on the journal, an oil seal and a dust cover; the oil seal is arranged between the bearing sleeve and the journal; a first mounting part is arranged on the outer side of the opening end of the bearing sleeve; one end of the dust cover is provided with a first protruding part protruding inwards, and the first protruding part is in interference fit with the first mounting part; the dust shield is in interference fit with the journal;

a second bulge is arranged on the inner wall of the dust cover, the second bulge is obliquely arranged towards the first bulge, and the second bulge is in contact with the end face of the opening side of the bearing sleeve; a first cavity is formed between the second boss and the first boss;

the dust cover is provided with a third protruding part, and the third protruding part is provided with a protruding part extending towards the direction of the first protruding part; the oil seal is provided with a first groove part, the first groove part is arranged at the side of the oil seal close to the dust cover, and the section of the first groove part is open towards the dust cover; the protruding portion is in contact with the side of the first groove portion away from the journal; the dust boot, the oil seal and the journal enclose a second chamber; the dust cover and the oil seal enclose a fifth chamber;

the oil seal comprises a framework and a lip part; the bearing sleeve is provided with a second mounting part; the journal further includes a third mounting portion; the framework is in interference fit with the second mounting part, and the lip is in interference fit with the third mounting part;

the lip comprises a first lip and a second lip, the first lip is in interference fit with the third mounting part, and the second lip is in interference fit with the third mounting part; the first lip, the second lip and the third mounting portion enclose a third chamber;

and a second groove part is arranged on the side of the oil seal, which is far away from the dust cover, and a fourth cavity is surrounded by the oil seal, the journal and the bearing sleeve.

2. The multi-chamber sealed gimbal of claim 1, wherein the journal provides a shoulder, the shoulder including a first straight portion and a first transition portion, the dust cap end abutting at the first transition portion, the first straight portion being proximate to the bearing housing, the fourth mounting portion of the dust cap being in interference fit with the first straight portion.

3. The multi-chamber sealed gimbal according to claim 2, wherein a width W of the first straight portion is less than or equal to a thickness T at the fourth mounting portion of the dust cover.

4. A multi-chamber sealed joint according to any of claims 2-3, wherein the first lip portion extends obliquely towards the shaft shoulder side; the second lip portion extends obliquely toward the bearing housing side.

5. The multi-chamber sealed gimbal of claim 4, wherein the third mounting portion includes a second straight portion and a second transition portion, the second transition portion being disposed at an end of the second straight portion near the dust boot direction side; the second lip portion is in interference fit with the second straight portion, and the first lip portion is in interference fit with the second transition portion.

6. A multi-chamber sealed joint according to claim 5, wherein the first lip is provided with a third transition portion which is adapted to the second transition portion.