CN115126792A - Universal joint sealing device - Google Patents

Universal joint sealing device Download PDF

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Publication number
CN115126792A
CN115126792A CN202211058716.8A CN202211058716A CN115126792A CN 115126792 A CN115126792 A CN 115126792A CN 202211058716 A CN202211058716 A CN 202211058716A CN 115126792 A CN115126792 A CN 115126792A
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CN
China
Prior art keywords
journal
bearing housing
oil seal
lip
bearing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202211058716.8A
Other languages
Chinese (zh)
Inventor
高建中
牛杰
许晏铭
王珊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wanxiang Qianchao Co Ltd
Original Assignee
Wanxiang Qianchao Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wanxiang Qianchao Co Ltd filed Critical Wanxiang Qianchao Co Ltd
Priority to CN202211058716.8A priority Critical patent/CN115126792A/en
Publication of CN115126792A publication Critical patent/CN115126792A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/84—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/26—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected
    • F16D3/38—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another
    • F16D3/382—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another constructional details of other than the intermediate member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/26—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected
    • F16D3/38—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another
    • F16D3/382—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another constructional details of other than the intermediate member
    • F16D3/385—Bearing cup; Bearing construction; Bearing seal; Mounting of bearing on the intermediate member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
    • F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3248—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3268—Mounting of sealing rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Devices (AREA)

Abstract

The invention relates to the technical field of automobile universal joint sealing, in particular to a universal joint sealing device. The invention relates to a universal joint sealing device, which comprises a shaft neck of a cross shaft and a bearing sleeve arranged on the shaft neck; the device also comprises an oil seal and a dust cover; the oil seal is arranged between the bearing sleeve and the shaft neck; the opening end of the bearing sleeve is provided with an inward bent edge rolling part; the journal includes first installation department, and the dust cover is provided with third installation department, first bellying and second bellying, third installation department and first installation department interference fit, first bellying towards bearing housing direction protrusion and with the contact of bearing housing outside, the second bellying towards bearing housing direction protrusion and with the inboard edge contact of binding portion, the dust cover encloses into first cavity with the bearing housing. The sealing device solves the problems that a sealing device with a common structure is poor in dustproof effect, impurities such as silt, muddy water and dust cannot be well prevented from invading a bearing, a universal joint cannot be well protected, and lubricating grease in the bearing cannot be well prevented from permeating an oil seal to leak to the external environment.

Description

Universal joint sealing device
Technical Field
The invention relates to the technical field of automobile universal joint sealing, in particular to a universal joint sealing device.
Background
The universal joint is a machine capable of realizing variable-angle power transmission and is used for transmitting the position of a transmission axis direction needing to be changed. It is a "joint" component of a universal transmission for an automotive drive system. On a vehicle driven by a front engine and a rear wheel, a universal joint transmission device is arranged between an output shaft of a speed changer and an input shaft of a main speed reducer of a drive axle; but the front wheel driving vehicle with the front engine omits a transmission shaft, and a universal joint is arranged between a front axle half shaft and wheels and is used for driving and steering.
The universal joint faces impurity such as various silt, muddy water, dust and often in the work and is many, and vibrates serious complicated road environment, especially pick up, cross country vehicle type, often works in the mud environment, and the operating mode is fairly abominable. 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, even invade the inside wearing and tearing bearing of bearing and lead to the universal joint bearing inefficacy.
The sealing device with the general structure has poor dustproof effect, can not well prevent impurities such as silt, muddy water and dust from invading the bearing, can not well protect the universal joint, and can not well prevent lubricating grease in the bearing from permeating the oil seal and leaking to the external environment.
Disclosure of Invention
The invention aims to: the universal joint sealing device solves the problems that a sealing device with a common structure is poor in dustproof effect, impurities such as silt, muddy water and dust cannot be well prevented from invading a bearing, a universal joint cannot be well protected, and lubricating grease in the bearing cannot be well prevented from leaking to the external environment through an oil seal.
In order to achieve the purpose, the invention adopts the following technical scheme:
a universal joint sealing device 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; the opening end of the bearing sleeve is provided with an inward bent edge rolling part; the journal includes first installation department, the dust cover is provided with third installation department, first bellying and second bellying, the third installation department with first installation department interference fit, first bellying court bearing housing direction protrusion and with the contact in the bearing housing outside, the second bellying court bearing housing direction protrusion and with the inboard contact of following of binding portion, the dust cover with the bearing housing encloses into first cavity.
On the basis of the above scheme and as a preferable scheme of the scheme: the first mounting part is provided with a first straight part and a first transition part, and the first straight part is arranged on the side close to the bearing sleeve; the third installation part comprises a third straight part and a third transition part, the third straight part is in interference fit with the first straight part, and the third transition part is abutted to the first transition part.
On the basis of the above scheme and as a preferable scheme of the scheme: the first installation part further comprises a stopping part located on the side, far away from the bearing sleeve, of the first transition part, and the end face of the dust cover is abutted to the stopping part.
On the basis of the above scheme and as a preferable scheme of the scheme: the first protruding part is in contact with a fourth transition part at the bent part of the edge rolling part.
On the basis of the above scheme and as a preferable scheme of the scheme: the oil seal comprises a framework and a lip body, the framework is in interference fit with the inner side of the bearing sleeve, and the lip body is in interference fit with the shaft neck.
On the basis of the above scheme and as a preferable scheme of the scheme: the second bulge is provided with a third bulge, the third bulge protrudes towards the first bulge, and the third bulge is in side contact with the side, close to the oil seal, of the inner side edge of the edge rolling part.
On the basis of the above scheme and as a preferable scheme of the scheme: the second boss is in contact with the oil seal; and the dust cover, the oil seal and the bearing sleeve enclose a second chamber.
On the basis of the above scheme and as a preferable scheme of the scheme: the second bulge part is provided with a fourth bulge part which is in contact with the oil seal; a third chamber is enclosed by the dust boot, the oil seal, and the journal.
On the basis of the above scheme and as a preferable scheme of the scheme: the oil seal is provided with a second groove part with an opening facing the dust cover; the fourth boss portion is in contact with a journal-near side of the second groove portion.
On the basis of the above scheme and as a preferable scheme of the scheme: the lip body includes first lip and second lip, first lip towards bearing housing direction slope and with journal interference fit, the second lip with journal interference fit, first lip, the second lip with the journal encloses into the fourth cavity.
On the basis of the above scheme and as a preferable scheme of the scheme: the journal still includes the second installation department, the second installation department includes second straight portion and second transition portion, the setting of second straight portion is keeping away from dust cover direction side, the second lip with the interference fit of second straight portion, first lip with the contact of 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 fifth transition portion which is matched with the second transition portion.
On the basis of the above scheme and as a preferable scheme of the scheme: the second lip portion inclines towards the bearing sleeve, and a fifth chamber is defined by the oil seal, the bearing sleeve and the journal.
On the basis of the above scheme and as a preferable scheme of the scheme: the bearing sleeve is internally provided with a first groove part, the framework is provided with a bending part which is bent towards the direction away from the shaft neck, and the bending part is embedded in the first groove part.
On the basis of the above scheme and as a preferable scheme of the scheme: the first groove portion abuts the flange portion.
In order to solve the problems that a sealing device with a common structure has poor dustproof effect, can not well prevent impurities such as silt, muddy water, dust and the like from invading a bearing, can not well protect a universal joint, can not well prevent lubricating grease in the bearing from leaking to the external environment through an oil seal, and the like, the invention has the following advantages:
the universal joint sealing device is provided with a dust cover, wherein a third mounting part of the dust cover is in interference fit with a first mounting part of a shaft neck, and a first bulge part of the dust cover is in contact with the outer side of the opening end of a bearing sleeve, so that the dust cover forms a protective structure for covering an opening of the bearing sleeve and an oil seal. Impurities such as silt, muddy water and dust in the external environment are directly and effectively prevented from invading the oil seal position and invading the bearing. Thereby well protecting the universal joint.
In particular, the joint seal of the present invention has a first chamber. The first bulge protrudes towards the bearing sleeve and is in contact with the outer side of the bearing sleeve, the second bulge protrudes towards the bearing sleeve and is in contact with the inner side edge of the edge rolling part, and then the dust cover and the bearing sleeve enclose a first cavity. On the premise of having the first chamber, even if there is some impurities such as silt, muddy water and dust to invade the first chamber from between first bellying and the bearing housing, the first chamber still can form and accomodate the impurity of invasion to prevent impurity further invasion towards the oil blanket direction.
Simultaneously, the dust cover also can accomodate and block the lubricating grease that sees through the oil blanket and leak out, prevents that lubricating grease from leaking to the external environment in.
Drawings
FIG. 1 is a schematic view of the construction of a sealing arrangement for a universal joint according to the present invention;
FIG. 2 is an enlarged view of the portion A of the present invention;
FIG. 3 is a partial front view of a journal of the present invention;
FIG. 4 is a cross-sectional view of the dust cap of the present invention;
fig. 5 is a cross-sectional view of the oil seal of the present invention.
Description of reference numerals:
100. A journal;
101. A first mounting portion;
102. A first straight portion;
103. A first transition portion;
104. A stopper portion;
105. A second straight portion;
106. A second transition portion;
107. A second mounting portion;
200. A bearing housing;
201. A edging section;
202. a first groove portion;
203. A fourth transition portion;
300. Oil sealing;
301. A framework;
302. A bent portion;
303. a first lip;
304. A second lip;
305. A second groove portion;
306. A fifth transition portion;
307. A lip body;
400. A dust cover;
401. A first boss;
402. A third boss portion;
403. A second boss portion;
404. a third mounting portion;
405. A third straight portion;
406. a third transition portion;
407. A fourth boss;
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 5, in the embodiment, a dust cover 400 is provided to enclose a first chamber 500 between the dust cover 400 and the bearing housing 200. The sealing device solves the problems that a sealing device with a common structure is poor in dustproof effect, impurities such as silt, muddy water and dust cannot be well prevented from invading a bearing, a universal joint cannot be well protected, and lubricating grease in the bearing cannot be well prevented from leaking to the external environment through the oil seal 300.
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 is provided with a bearing formed by a roller, a bearing bush 200 and an oil seal 300, the shaft journal 100 comprises a first mounting part 101 and a second mounting part 107, the first mounting part 101 comprises a first straight part 102 and a first transition part 103, the second mounting part 107 comprises a second straight part 105 and a second transition part 106, a third mounting part 404 at one end of the dust cover 400 is in interference fit with the first mounting part 101 of the shaft journal 100, and a first protruding part 401 at the other end is in contact with the outer side of the opening end of the bearing bush 200, so that the opening end of the bearing bush 200 is covered by the dust cover 400, and sealed isolation protection is formed for bearing structures such as the oil seal 300 and the oil seal 300.
In the embodiment of the present disclosure, as shown in fig. 1 and fig. 2, a universal joint sealing device includes a journal 100 of a cross shaft, a bearing housing 200 disposed on the journal 100, an oil seal 300, and a dust cover 400; the oil seal 300 is disposed between the bearing housing 200 and the journal 100; the opening end of the bearing sleeve 200 is provided with an inward bent edge rolling part 201; journal 100 includes first installation department 101, dust cover 400 is provided with third installation department 404, first bellying 401 and second bellying 403, third installation department 404 with first installation department 101 interference fit, first bellying 401 court bearing housing 200 direction protrusion and with the contact outside bearing housing 200, second bellying 403 court bearing housing 200 direction protrusion and with the inboard contact of following of portion 201 of borduring, dust cover 400 with bearing housing 200 encloses into first chamber 500.
The universal joint sealing device of the invention is provided with a dust cover 400, wherein a third mounting part 404 of the dust cover 400 is in interference fit with a first mounting part 101 of a shaft neck 100, and a first bulge part 401 of the dust cover 400 is contacted with the outer side of the opening end of a bearing sleeve 200, so that the dust cover 400 forms a protection structure for covering the opening of the bearing sleeve 200 and an oil seal 300. The third mounting portion 404 and the first mounting portion 101 are typically formed in a relatively fixed connection by a relatively large interference fit. While the contact of the first boss 401 with the outer side of the open end of the bearing housing 200 is a relatively rotatable contact seal, depending on the actual use, impurities such as sand, mud, dust, etc. usually do not enter the position of the oil seal 300 from between the first mounting portion 101 and the third mounting portion 404, but generally enter from between the first boss 401 and the bearing housing 200. However, by providing the first chamber 500, the impurities entering from between the first boss 401 and the bearing housing 200 are stored and buffered in the first chamber 500, and the impurities such as silt, muddy water, and dust are prevented from further entering toward the oil seal 300.
Meanwhile, the dust cover 400 can also receive and block the grease leaked through the oil seal 300, preventing the grease from leaking into the external environment.
In the embodiment of the present disclosure, as shown in fig. 2 and 3, the first mounting portion 101 is provided with a first straight portion 102 and a first transition portion 103, and the first straight portion 102 is disposed on a side close to the bearing housing 200; the third mounting portion 404 includes a third straight portion 405 and a third transition portion 406, the third straight portion 405 is in interference fit with the first straight portion 102, and the third transition portion 406 is in abutment with the first transition portion 103. The third straight portion 405 is in interference fit with the first straight portion 102, so that a relatively fixed installation effect can be achieved, and a sealing effect is achieved. In addition, the third transition part 406 abuts against the first transition part 103, so that the sealing effect is further enhanced, and in view of the use occasion of the universal joint with more vibration, the dust cover 400 is prevented from moving in the direction away from the oil seal 300 to a certain extent, meanwhile, the dust cover 400 is closer to the first transition part 103, the more the third transition part 406 is matched with the first transition part 103, and the better the sealing effect is.
In the embodiment of the present disclosure, the first mounting portion 101 further includes a stopper portion 104 located on the side of the first transition portion 103 away from the bearing housing 200, and an end surface of the dust cover 400 abuts against the stopper portion 104. The stopper portion 104 can absolutely and effectively restrain the dust cover 400, and the dust cover 400 is supported by the stopper portion 104, so that the dust cover 400 is prevented from moving away from the oil seal 300.
In the embodiment of the present disclosure, the first protruding portion 401 contacts with the fourth transition portion 203 at the bent portion of the hem portion 201. As shown in fig. 2, the fourth transition portion 203 is a bending arc of the rolled portion 201 on the bearing housing 200, the inner wall surface of the first protrusion 401 is an inclined surface inclined toward a direction away from the journal 100, and when the first protrusion 401 contacts the fourth transition portion 203, the inclined surface is just closely fitted with the fourth transition portion 203, so that an effective seal capable of moving relatively is formed.
In the embodiment of the present disclosure, the oil seal 300 includes a skeleton 301 and a lip 307, the skeleton 301 is in interference fit with the inner side of the bearing housing 200, and the lip 307 is in interference fit with the journal 100. The lip body 307 and the journal 100 are interference-fitted to form a sealing effect capable of relative rotation by interference-fitting the skeleton 301 and the inside of the bearing housing 200 to relatively fix the oil seal 300 and the bearing housing 200.
In the embodiment of the present disclosure, referring to fig. 2 and fig. 4, in order to facilitate installation and form a better sealing effect, the second convex portion 403 is provided with a third convex portion 402, the third convex portion 402 protrudes toward the first convex portion 401, and the third convex portion 402 contacts with the side of the inner side edge of the crimping portion 201 close to the oil seal 300. Wherein the second convex portion 403 contacts the crimping portion 201 to form a seal, so that the first chamber 500 is formed between the first chamber 500 and the first convex portion 401, as shown in fig. 2, the second convex portion 403 extends from the inner edge of the crimping portion 201 toward the oil seal 300, the second convex portion 403 protrudes toward the oil seal 300, and the third convex portion 402 provided on the second convex portion 403 contacts the side of the crimping portion 201 close to the oil seal 300.
For convenience of installation, the third boss 402 has a chamfered structure on the side close to the oil seal 300, and the third boss 402 forms a hook-shaped cross section on the second boss 403. At the time of mounting, the dust covers 400 may be opposed to the bearing housings 200 and brought close to each other, and then the second projecting portions 403 may be inserted from the binding portion 201 and the third projecting portions 402 may be automatically brought into contact with the binding portion 201. In addition, the first protruding part 401 contacts with the bearing housing 200, the dust cover 400 is connected with the bearing housing 200, and then the journal 100 is inserted into the bearing housing 200 through the dust cover 400, so that the bearing structure is mounted. The operation is very convenient, and the sealing effect is good.
In the embodiment of the present disclosure, as shown in fig. 2, the second convex portion 403 is in contact with the oil seal 300; the dust cover 400, the oil seal 300 and the bearing housing 200 enclose a second chamber 600. If there is no second chamber 600, the impurities such as silt, muddy water and dust intruding through the first chamber 500 are more likely to damage the oil seal 300 through the relatively movable joint and intruding into the joint between the oil seal 300 and the journal 100, and more seriously, the abnormal wear of the roller inside the bearing and the journal 100 through the oil seal 300 will be caused, and further, the grease will be leaked in a large amount and the bearing will fail. However, after the second chamber 600 is formed, the second chamber 600 receives and prevents impurities such as silt, muddy water, and dust, which have entered the second chamber 600 through the engagement of the second protrusion 403 with the lip portion 201, from entering further in the roller direction.
In the disclosed embodiment, the second boss 403 is provided with a fourth boss 407, and the fourth boss 407 is in contact with the oil seal 300; the dust boot 400, oil seal 300 and journal 100 enclose a third chamber 700. The fourth convex portion 407 facilitates the contact fit between the second convex portion 403 and the oil seal 300, and the second convex portion 403 contacts the oil seal 300 through the fourth convex portion 407, so that the accommodating space of the second chamber 600 and the third chamber 700 is enlarged.
In the disclosed embodiment, the oil seal 300 is provided with a second groove portion 305 that opens toward the dust cover 400; the fourth convex portion 407 contacts the journal 100 side of the second groove portion 305. The second groove portion 305 further enlarges the accommodating space of the second chamber 600 and the third chamber 700, and the fourth protrusion portion 407 protrudes obliquely toward the journal 100, and is in good contact with the sidewall of the second groove portion 305 obliquely, so that a larger deformation amount is obtained during matching, and a better sealing effect is obtained.
In the embodiment of the present disclosure, as shown in fig. 5, the lip 307 includes a first lip 303 and a second lip 304, the first lip 303 is inclined toward the bearing housing 200 and is in interference fit with the journal 100, the second lip 304 is in interference fit with the journal 100, and the first lip 303, the second lip 304 and the journal 100 enclose a fourth cavity 800. The fourth chamber 800 receives and blocks the intrusion of foreign substances. The leaked grease can be stored and prevented in the same manner.
In the embodiment of the present disclosure, to form a better sealing effect, the journal 100 further includes a second mounting portion 107, the second mounting portion 107 includes a second straight portion 105 and a second transition portion 106, the second straight portion 105 is disposed on a side away from the dust cover 400, the second lip 304 is in interference fit with the second straight portion 105, and the first lip 303 is in contact with the second transition portion 106.
In the disclosed embodiment, the first lip 303 is provided with a fifth transition 306 that mates with the second transition 106. The fifth transition portion 306 is in contact with the second transition portion 106, so that the sealing effect is better.
In the embodiment of the present disclosure, the second lip 304 is inclined toward the bearing housing 200, and the oil seal 300, the bearing housing 200 and the journal 100 enclose a fifth chamber 900. The fifth chamber 900 increases the storage space of the grease, and ensures the lubricating effect of the grease.
In the embodiment of the present disclosure, a first groove portion 202 is disposed inside the bearing housing 200, the skeleton 301 is provided with a bent portion 302 bent in a direction away from the journal 100, and the bent portion 302 is fitted in the first groove portion 202. The bent portion 302 is fitted in the first groove portion 202 to first improve the sealing performance between the oil seal 300 and the bearing housing 200. Meanwhile, the position of the oil seal 300 can be well restrained, and the oil seal 300 is prevented from moving in a string manner.
In the disclosed embodiment, the first groove portion 202 is adjacent to the rolled portion 201 for easy installation and manufacturing. Specifically, during manufacturing, a step surface can be formed at the opening end of the bearing sleeve 200 on the inner wall of the straight cylinder, and after the oil seal 300 is embedded into the bearing sleeve 200 on the inner wall of the straight cylinder, the side of the bending part 302 away from the dust cover 400 abuts against the step of the step surface. The first benefit is that there is no concern about the fit of the oil seal 300 with respect to the bearing housing 200. Then, the opening of the bearing housing 200 is bent inward by pressing or edge-bending to form the rolled portion 201, and the inner side wall of the rolled portion 201 is just in tight contact with the side of the bent portion 302 close to the dust cover 400.
In the above scheme, the first chamber 500, the second chamber 600, the third chamber 700 and the fourth chamber 800 do not function alone to unidirectionally receive and prevent impurities such as silt, muddy water and dust in the external environment from invading the bearing. And simultaneously, the grease in the bearing can be prevented from leaking to the external environment. The lubricating grease also plays a role in preventing abnormal wear of the bearing caused by large leakage of the lubricating grease. The dust cover 400 and the lip 307 are elastic, but the material includes but is not limited to rubber, nylon, copper, etc.
In addition, the extending direction of the inclined arrangement of the special part in each proposal is opposite to the passing direction of the invasion of impurities such as silt, muddy water and dust in the external environment, thereby playing a role of better preventing the impurities from passing through.
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 (15)

1. A universal joint sealing device 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; the opening end of the bearing sleeve is provided with an inward bent edge rolling part; the journal includes first installation department, the dust cover is provided with third installation department, first bellying and second bellying, the third installation department with first installation department interference fit, first bellying court bearing housing direction protrusion and with the contact in the bearing housing outside, the second bellying court bearing housing direction protrusion and with the inboard contact of following of binding portion, the dust cover with the bearing housing encloses into first cavity.
2. The joint seal of claim 1, wherein the first mounting portion provides a first straight portion and a first transition portion, the first straight portion being disposed on a side adjacent to the bearing housing; the third installation part comprises a third straight part and a third transition part, the third straight part is in interference fit with the first straight part, and the third transition part is abutted to the first transition part.
3. The joint seal of claim 2, wherein the first mounting portion further comprises a stop portion located on a side of the first transition portion away from the bearing housing, and wherein an end surface of the dust boot abuts the stop portion.
4. The joint seal of claim 1, wherein the first lobe contacts a fourth transition at the crimp segment.
5. The joint seal according to any one of claims 1 to 4, wherein the oil seal comprises a skeleton and a lip body, the skeleton is in interference fit with the inside of the bearing housing, and the lip body is in interference fit with the journal.
6. The joint seal device according to claim 5, wherein the second projecting portion is provided with a third projecting portion that projects toward the first projecting portion, the third projecting portion being in contact with a side of the inside edge of the burring portion that is close to the oil seal.
7. The joint seal apparatus according to claim 5, wherein the second boss is in contact with the oil seal; and the dust cover, the oil seal and the bearing sleeve enclose a second chamber.
8. The joint seal device according to claim 7, wherein the second boss portion is provided with a fourth boss portion that is in contact with an oil seal; the dust boot, the oil seal, and the journal enclose a third chamber.
9. The joint seal device according to claim 8, wherein the oil seal is provided with a second groove portion that opens toward the dust cover; the fourth boss portion is in contact with a journal-near side of the second groove portion.
10. The joint seal of claim 5, wherein the lip body comprises a first lip that slopes toward the bearing housing and that is in interference fit with the journal, and a second lip that is in interference fit with the journal, the first lip, the second lip and the journal defining a fourth chamber.
11. The joint seal of claim 10, wherein the journal further comprises a second mounting portion comprising a second straight portion disposed on a side away from the dust boot and a second transition portion, the second lip being in interference fit with the second straight portion, the first lip being in contact with the second transition portion.
12. The joint seal of claim 11, wherein the first lip is provided with a fifth transition that mates with the second transition.
13. The joint seal of claim 10, wherein the second lip is angled toward the bearing housing, and wherein the oil seal, the bearing housing, and the journal define a fifth chamber.
14. The sealing device according to claim 5, wherein a first groove portion is provided inside the bearing housing, and the frame is provided with a bent portion bent away from the journal, the bent portion being fitted into the first groove portion.
15. The joint seal of claim 14, wherein the first groove portion abuts the rolled edge portion.
CN202211058716.8A 2022-08-31 2022-08-31 Universal joint sealing device Pending CN115126792A (en)

Priority Applications (1)

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CN202211058716.8A CN115126792A (en) 2022-08-31 2022-08-31 Universal joint sealing device

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Application Number Priority Date Filing Date Title
CN202211058716.8A CN115126792A (en) 2022-08-31 2022-08-31 Universal joint sealing device

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115405635A (en) * 2022-11-03 2022-11-29 万向钱潮股份公司 Universal joint
CN117128253A (en) * 2023-10-27 2023-11-28 万向钱潮股份公司 Cross axle dust cover and dustproof cross axle structure

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2144172A1 (en) * 1971-09-03 1973-03-15 Schaeffler Ohg Industriewerk SEAL FOR BEARING BUSHINGS
FR2627562A1 (en) * 1988-02-24 1989-08-25 Gelenkwellenbau Gmbh DEVICE FOR SEALING A CARDAN JOINT CROSSOVER
US5597356A (en) * 1994-04-08 1997-01-28 Ina Walzlager Schaeffler Kg Sealing arrangement for a cardan spider bush
CN2743603Y (en) * 2004-12-02 2005-11-30 杭州德意万向节有限公司 Crossing pin type universal joint
US20060125189A1 (en) * 2003-01-21 2006-06-15 Ina-Schaeffler Kg Gasket unit for a bearing bushing
CN109372901A (en) * 2018-11-16 2019-02-22 万向钱潮股份有限公司 A kind of universal joint of composite construction

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2144172A1 (en) * 1971-09-03 1973-03-15 Schaeffler Ohg Industriewerk SEAL FOR BEARING BUSHINGS
FR2627562A1 (en) * 1988-02-24 1989-08-25 Gelenkwellenbau Gmbh DEVICE FOR SEALING A CARDAN JOINT CROSSOVER
US5597356A (en) * 1994-04-08 1997-01-28 Ina Walzlager Schaeffler Kg Sealing arrangement for a cardan spider bush
US20060125189A1 (en) * 2003-01-21 2006-06-15 Ina-Schaeffler Kg Gasket unit for a bearing bushing
CN2743603Y (en) * 2004-12-02 2005-11-30 杭州德意万向节有限公司 Crossing pin type universal joint
CN109372901A (en) * 2018-11-16 2019-02-22 万向钱潮股份有限公司 A kind of universal joint of composite construction

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115405635A (en) * 2022-11-03 2022-11-29 万向钱潮股份公司 Universal joint
CN117128253A (en) * 2023-10-27 2023-11-28 万向钱潮股份公司 Cross axle dust cover and dustproof cross axle structure
CN117128253B (en) * 2023-10-27 2024-01-16 万向钱潮股份公司 Cross axle dust cover and dustproof cross axle structure

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Application publication date: 20220930