CN117072552B - Hub bearing - Google Patents

Hub bearing Download PDF

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Publication number
CN117072552B
CN117072552B CN202311349958.7A CN202311349958A CN117072552B CN 117072552 B CN117072552 B CN 117072552B CN 202311349958 A CN202311349958 A CN 202311349958A CN 117072552 B CN117072552 B CN 117072552B
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CN
China
Prior art keywords
unit
lip
sealing
inner ring
assembly
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.)
Active
Application number
CN202311349958.7A
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Chinese (zh)
Other versions
CN117072552A (en
Inventor
汝连志
郭权
李凯
王钧民
郑帅
胡永乐
甘一彪
李丝阳
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
Zhejiang Wanxiang Precision Industry Co Ltd
Original Assignee
Wanxiang Qianchao Co Ltd
Zhejiang Wanxiang Precision Industry 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, Zhejiang Wanxiang Precision Industry Co Ltd filed Critical Wanxiang Qianchao Co Ltd
Priority to CN202311349958.7A priority Critical patent/CN117072552B/en
Publication of CN117072552A publication Critical patent/CN117072552A/en
Application granted granted Critical
Publication of CN117072552B publication Critical patent/CN117072552B/en
Active 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/583—Details of specific parts of races
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
    • F16C33/7806—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for spherical roller bearings
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
    • F16C33/7823—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region of sealing 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction 

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

The invention relates to the technical field of vehicle transmission devices, in particular to a hub bearing. The inner ring assembly comprises a first inner ring unit and a flange unit which are connected. The outer ring assembly is sleeved outside the first inner ring unit. The rolling assembly is arranged between the outer ring assembly and the first inner ring unit. The sealing assembly is arranged at one side of the rolling assembly. The first sealing unit of the sealing assembly includes a first backbone and a first lip. The first framework comprises a first supporting part, a first connecting part and a first extending part which are sequentially connected. The first supporting part is matched with the first inner ring unit. The first connecting portion extends from the first supporting portion toward the outer ring assembly. The first extension portion extends in a direction away from the flange unit. The first lip portion extends obliquely from the first extension portion. The second armature of the seal assembly cooperates with the outer ring assembly. The first lip is abutted with the second framework. The second lip of the sealing assembly is connected with the second framework and is abutted with the first supporting part. Thus, the problem that the sealing assembly of the hub bearing is incomplete in dust prevention is solved.

Description

Hub bearing
Technical Field
The invention relates to the technical field of vehicle transmission devices, in particular to a hub bearing.
Background
The hub is a component for connecting the tire and the transmission half shaft, and the main movement mode is rotation around the center of the hub, so that the comfort and the safety of the vehicle can be directly influenced. In order to make the rotation of the hub smooth and reduce the torque loss during the rotation, a hub bearing can be arranged in the hub, so that the effect of reducing noise and improving comfort is achieved.
The hub bearing is positioned at the bottom end of the vehicle and has a short distance from the ground. During the running of the vehicle, foreign matter from the ground may enter the hub bearing. In order to prevent foreign matter from entering the hub bearing, a seal assembly may be provided at an end of the hub bearing. When the hub bearing runs, the outer ring is fixed, the inner ring rotates, and the sealing assembly is difficult to completely resist foreign matters under the condition of not interfering the rotation of the hub bearing.
Disclosure of Invention
In order to solve the problem of incomplete dust prevention of a sealing assembly of a hub bearing, the invention provides a hub bearing, which comprises:
the inner ring assembly comprises a first inner ring unit and a flange unit; one end of the first inner ring unit is fixedly connected with the flange unit;
the outer ring assembly is sleeved on the outer periphery side of the first inner ring unit;
the rolling assembly is arranged in a space surrounded by the outer ring assembly and the first inner ring unit;
the sealing assembly is arranged on one side, close to the flange unit, of the rolling assembly; the sealing assembly comprises a first sealing unit and a second sealing unit; the first sealing unit comprises a first framework and a first lip; the first framework comprises a first supporting part, a first connecting part and a first extending part; the first supporting part, the first connecting part and the first extending part are sequentially and fixedly connected; the first supporting part is in interference fit with the outer peripheral surface of the first inner ring unit; the first connecting part extends from one end of the first supporting part, which is close to the flange unit, towards the position, which is far away from the first inner ring unit, and the first connecting part is arranged at intervals with the flange unit; the first extension part extends from one end of the first connection part towards a direction away from the flange unit; one end of the first lip part is fixedly connected with the first extension part, and the other end of the first lip part obliquely extends towards a direction away from the first extension part and close to the flange unit; the second sealing unit comprises a second framework and a second lip; the second framework is in interference fit with the inner peripheral surface of the outer ring assembly; one end of the first lip part far away from the first extension part is abutted with the second framework; one end of the second lip is fixedly connected with one end of the second framework, and the other end of the second lip extends towards the direction close to the first supporting part and is abutted to the first supporting part.
In some embodiments, the second armature comprises a second support portion, a second extension portion; the second supporting part is in interference fit with the inner peripheral surface of the outer ring assembly; the second extension part extends from one end of the second support part away from the flange unit towards the direction approaching the first inner ring unit; the second lip comprises a second connecting part and a sealing lip; the second connecting part extends from one end of the second extending part away from the second supporting part towards the direction approaching the first inner ring unit; the sealing lip obliquely extends from one end of the second connecting part far away from the second extending part towards a direction close to the first inner ring unit and close to the flange unit, and the extending end of the sealing lip is abutted with the first supporting part.
In some embodiments, the distance between the side wall of the second connecting portion away from the flange unit and the side wall of the flange unit is greater than the distance between the end of the first supporting portion away from the flange unit and the side wall of the flange unit.
In some embodiments, the second lip further comprises a mounting groove; the mounting groove is arranged on one side of the sealing lip, which is far away from the first inner ring unit; the second sealing unit includes a constriction; the contraction part is sleeved in the mounting groove and applies contraction force to the sealing lip.
In some embodiments, the pinch portion applies a pinch force at a force point that is a greater distance from the flange unit sidewall than the seal lip abuts the first support portion.
In some embodiments, the second sealing unit further comprises a first boss; the first protruding part extends from one end of the second extending part away from the second supporting part towards the direction approaching the rolling assembly; the distance between the extending end of the first protruding part and the side wall of the flange unit is larger than the distance between one end, far away from the flange unit, of the first supporting part and the side wall of the flange unit.
In some embodiments, the first projection has an extended end spaced from the rolling assembly by 0.3mm to 0.5mm.
In some embodiments, the second sealing unit further comprises a second boss; the second protruding part extends from one side of the second extending part away from the flange unit towards the direction approaching the rolling assembly; the second protruding part is arranged in a space between the first protruding part and the outer ring component; the distance between the second protruding portion extending end and the side wall of the flange unit is larger than that between the first protruding portion extending end and the side wall of the flange unit.
In some embodiments, the second sealing unit further comprises a first dust-proof portion; the first dust-proof part obliquely extends from one side of the second extending part close to the flange unit towards the direction close to the first extending part; the first dust-proof part extending end is arranged at intervals with the first extending part; the first dust-proof portion is disposed at an interval from the seal lip.
In some embodiments, the second armature further comprises a third extension; the third extension part extends from one end of the second supporting part away from the second extension part towards the direction away from the first inner ring unit; the side wall of the third extension part is abutted with the end face of the outer ring assembly; the second sealing unit further comprises a second dust prevention part; the second dustproof part extends from one end of the third extension part away from the second supporting part towards the flange unit, and the extending end of the second dustproof part is arranged at intervals with the flange unit.
In order to solve the problem of incomplete dust prevention of the sealing component of the hub bearing, the invention has the following advantages:
the sealing component can be arranged on the side edge of the rolling component, and foreign matters can be prevented from entering the inside of the hub bearing. A first sealing unit, a second sealing unit may be included. The first sealing unit may include a first backbone, a first lip. The first framework may include a first supporting portion, a first connecting portion, and a first extending portion that are fixedly connected in sequence. The first supporting part can tightly fix the first framework on the outer peripheral surface of the first inner ring unit to provide stable support. The first connecting part is arranged at intervals with the flange unit, even if foreign matters enter, the interval space can enable the foreign matters to have buffer spaces, the foreign matters can be temporarily stored in the interval space and cannot directly contact with the rolling assembly, and the influence on the operation of the bearing unit is avoided. One end of the first extension part can be fixedly connected with one end of the first connecting part, and the other end of the first extension part extends obliquely. The manner of the fixed connection may be a vulcanization process. The second sealing unit may include a second backbone, a second lip. The second skeleton may tightly fix the second skeleton to the inner peripheral surface of the outer ring assembly. When the foreign matter passes through the blocking of the first lip portion, the second lip portion can further prevent the foreign matter from directly entering the inside of the bearing unit.
Drawings
FIG. 1 illustrates a hub bearing schematic diagram of an embodiment;
FIG. 2 shows a schematic view of a hub bearing of another embodiment.
Reference numerals: 01 an inner ring assembly; 11 a first inner ring unit; 111 a first inner race track; 112 a first mounting portion; 12 a second inner ring unit; 121 a second inner race track; 122 a second mounting portion; a 13 flange unit; 131 flange plates; 132 a first sidewall; a 14 spline unit; 02 an outer ring assembly; 21 an outer ring body; a first outer race track 22; a second outer race track 23; 24 a third mounting portion; 25 a fourth mounting portion; 03 a rolling assembly; 31 a first row of balls; 32 a first holder; 33 a second row of balls; 34 a second holder; a first scroll receiving area 35; a second scroll receiving area 36; a third scroll receiving area 37; 04 a sealing assembly; 41 a first sealing unit; 411 a first skeleton; 4111 a first support; 4112 first connection portion; 4113 first extension; 412 a first lip; a second sealing unit 42; 421 a second scaffold; 4211 a second support portion; 4212 a second extension; 4213 a third extension; 422 a first dust guard; 423 second dust-proof section; 424 a second lip; 4241 a second connection portion; 4242 sealing lips; 4243 mounting slots; 425 a first protrusion; 426 a second boss; 427.
Detailed Description
The disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those of ordinary skill in the art to better understand and thus practice the present disclosure, and are not meant to imply any limitation on the scope of the present disclosure.
As used herein, the term "comprising" and variants thereof are to be interpreted as meaning "including but not limited to" open-ended terms. The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment. The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "transverse", "longitudinal", etc. refer to an orientation or positional relationship based on that shown in the drawings. These terms are used primarily to better describe the present application and its embodiments and are not intended to limit the indicated device, element or component to a particular orientation or to be constructed and operated in a particular orientation. Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate. Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be. Furthermore, the terms "first," "second," and the like, are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of devices, elements, or components indicated. Unless otherwise indicated, the meaning of "a plurality" is two or more.
The embodiment discloses a hub bearing, as shown in fig. 1 and 2, may include:
the inner ring assembly 01, the inner ring assembly 01 comprises a first inner ring unit 11 and a flange unit 13; one end of the first inner ring unit 11 is fixedly connected with the flange unit 13;
an outer ring assembly 02, wherein the outer ring assembly 02 is sleeved on the outer periphery side of the first inner ring unit 11;
a rolling assembly 03, the rolling assembly 03 being disposed in a space surrounded by the outer ring assembly 02 and the first inner ring unit 11;
a sealing assembly 04, wherein the sealing assembly 04 is arranged at one side of the rolling assembly 03 close to the flange unit 13; the sealing assembly 04 includes a first sealing unit 41, a second sealing unit 42; the first sealing unit 41 includes a first skeleton 411, a first lip 412; the first frame 411 includes a first support portion 4111, a first connection portion 4112, and a first extension portion 4113; the first support portion 4111, the first connection portion 4112, and the first extension portion 4113 are sequentially and fixedly connected; the first support portion 4111 is interference fit with the outer peripheral surface of the first inner ring unit 11; the first connecting portion 4112 extends from an end of the first supporting portion 4111 near the flange unit 13 toward a position far from the first inner ring unit 11, and the first connecting portion 4112 is spaced apart from the flange unit 13; the first extension portion 4113 extends from one end of the first connection portion 4112 in a direction away from the flange unit 13; one end of the first lip 412 is fixedly connected with the first extension portion 4113, and the other end thereof extends obliquely in a direction away from the first extension portion 4113 and close to the flange unit 13; the second sealing unit 42 includes a second backbone 421, a second lip 424; the second skeleton 421 is in interference fit with the inner peripheral surface of the outer ring assembly 02; one end of the first lip 412 away from the first extension portion 4113 abuts against the second skeleton 421; one end of the second lip 424 is fixedly connected to one end of the second frame 421, and the other end extends in a direction approaching the first support portion 4111 and abuts against the first support portion 4111.
In this embodiment, the hub is a component located between the tire and the drive axle shaft, and the hub, tire, and drive axle shaft rotate in synchronization to transmit torque from the drive axle shaft to the tire, so that the tire and the ground roll relatively to enable the vehicle to run. In order to reduce vibrations and noise and to improve stability of the hub during operation, a hub bearing may be provided in the hub. Because the hub bearing is located the bottom of vehicle chassis, and the distance with ground is shorter, there is the foreign matter entering hub bearing when the vehicle is gone, influences hub bearing's rolling element 03 roll, leads to the wheel hub wearing and tearing unusual, take place to block etc. can directly influence the security of vehicle. It can be seen that the provision of the sealing assembly 04 at the lateral end of the rolling assembly 03 is one of the indispensable measures. As shown in fig. 1 and 2, the hub bearing may include an inner ring assembly 01, an outer ring assembly 02, a rolling assembly 03, and a sealing assembly 04. The outer ring component 02 can be sleeved on the outer side of the inner ring component 01, a rolling component 03 can be embedded between the inner ring component 01 and the outer ring component 02, and a sealing component 04 can be arranged on the side edge of the rolling component 03.
The inner ring assembly 01 may include a first inner ring unit 11, a flange unit 13. One end of the first inner ring unit 11 can be fixedly connected with the flange unit 13 and integrally formed, so that the strength of the inner ring assembly 01 can be improved, the processing procedures of the inner ring assembly 01 can be reduced, and the aim of improving the production efficiency is fulfilled.
The inner circumferential surface of the outer ring assembly 02 may be sleeved on the outer circumferential surface of the first inner ring unit 11, and the inner circumferential surface of the outer ring assembly 02 may be disposed at a distance from the outer circumferential surface of the first inner ring unit 11. The rolling assembly 03 may be embedded in the spaced-apart space. The rolling component 03 can mutually roll and rub with the outer ring component 02 and the inner ring component 01, so that the friction resistance of the hub bearing during rotation can be reduced, and the hub bearing runs smoothly.
The two ends of the sealing component 04 can be respectively abutted against the inner peripheral surface of the outer ring component 02 and the outer peripheral surface of the first inner ring unit 11 and are arranged on one side of the rolling component 03 close to the flange unit 13, so that foreign matters can be prevented from directly contacting the rolling component 03, and the effect of ensuring the stable operation of the bearing unit is achieved. The sealing assembly 04 may include a first sealing unit 41, a second sealing unit 42. The first sealing unit 41 may abut against the second sealing unit 42 to form a seal. When the first sealing unit 41 cannot completely prevent the entry of foreign matter due to aging or the like, the foreign matter may be temporarily stored in the sealing chamber and then discharged as the bearing unit rotates. This way of providing two sealing units simultaneously may further increase the protection capability of the sealing assembly 04. The first sealing unit 41 may include a first backbone 411, a first lip 412. The first frame 411 may be bent into a C shape (as shown in fig. 2) from a plate material, and may include a first supporting portion 4111, a first connecting portion 4112, and a first extending portion 4113 that are sequentially and fixedly connected, so that the processing and the strength improvement of the first frame 411 may be facilitated. The first support portion 4111 may be interference fit with the outer circumferential surface of the first inner ring unit 11, and the first support portion 4111 may be fixed without using an additional connecting member, so that the effect of weight reduction may be achieved. One end of the first connection portion 4112 may be fixedly connected to one end of the first support portion 4111 near the flange unit 13, and the other end of the first connection portion 4112 may extend in a direction near the inner circumferential surface of the outer ring assembly 02, which may be perpendicular or slightly inclined with respect to the first support portion 4111. The first connecting portion 4112 may be disposed at a distance from the flange unit 13 near the side of the first supporting portion 4111, when the foreign objects enter the hub bearing, the space can buffer the foreign objects, and the foreign objects are temporarily stored in the space, so as to avoid the foreign objects from directly contacting the rolling assembly 03, and ensure smooth operation of the hub bearing. One end of the first extension portion 4113 may be fixedly connected to one end of the first connection portion 4112 near the inner circumferential surface of the outer ring assembly 02, and the other end of the first extension portion 4113 may extend in a direction away from the flange unit 13. One end of the first lip 412 may be fixedly connected to a side of the first extension portion 4113 near the inner peripheral surface of the outer ring assembly 02, where the fixing connection may be a vulcanization process, so that the first lip 412 may be stably connected to the first extension portion 4113. The other end of the first lip 412 may extend in a direction approaching the inner peripheral surface of the outer ring assembly 02 and be inclined in a direction approaching the flange unit 13. The second sealing unit 42 may include a second backbone 421, a second lip 424. The second cage 421 may be interference fit with the inner circumferential surface of the outer ring assembly 02. In this way, the outer race assembly 02 can be securely mated with the second backbone 421 without the use of additional connecting members. One end of the first lip 412 near the inner circumferential surface of the outer ring assembly 02 may abut against one side of the second bobbin 421 away from the inner circumferential surface of the outer ring assembly 02. The first lip 412 will deform when abutting, and the first lip 412 can generate a certain pressure to the second skeleton 421 under the action of the resilience force, so that the first lip 412 and the second skeleton 421 can be sealed more tightly. When foreign matters enter from the gap between the flange unit 13 and the outer ring assembly 02, the first lip 412 and the second frame 421 can reduce the foreign matters entering the bearing unit, so as to achieve the effect of prolonging the service life of the bearing hub. One end of the second lip 424 may be fixedly coupled to an end of the second backbone 421 remote from the outer race assembly 02. The fixing connection may be a vulcanization process, so that the second lip 424 may be firmly connected with the second skeleton 421. The other end of the second lip 424 may extend in a direction approaching the outer circumferential surface of the first inner ring unit 11 and abut against a side of the first support portion 4111 away from the first inner ring unit 11. The second lip 424 may deform when abutting, and the resilience of the second lip 424 may make the second lip 424 tightly sealed with the second skeleton 421. When the first lip 412 ages, a gap is easily generated at the contact position between the first lip 412 and the second support portion 4211, and a portion of foreign matter may enter through the gap between the first lip 412 and the second frame 421 during the vehicle driving, the direction in which the second lip 424 extends obliquely may make the second lip 424 more easily pressed against the first support portion 4111 by its own elastic force, so that the contact area between the second lip 424 and the first support portion 4111 is larger, the foreign matter may be more stably prevented from entering the bearing unit, and smooth operation of the bearing unit is ensured, thereby improving the comfort and safety of the vehicle driving.
In other embodiments, inner race assembly 01 may also include a second inner race unit 12. The second inner ring unit 12 can be detachably connected to the end of the first inner ring unit 11 remote from the flange unit 13, in such a way that it can be replaced according to different wear degrees of the first inner ring unit 11 and the second inner ring unit 12, respectively. The second inner ring unit 12 may include a second inner ring raceway 121, a second mounting portion 122. The second inner ring raceway 121 may be disposed at an end of the second inner ring unit 12 near the flange unit 13, and may be used for accommodating the rolling assembly 03 and for rolling friction with the rolling assembly 03. The second mounting portion 122 may be disposed at an end of the second inner ring unit 12 away from the flange unit 13, and may fix the sealing assembly 04 thereto according to a use requirement. The first inner ring unit 11 of the inner ring assembly 01 may include a first inner ring raceway 111, a first mounting portion 112. The first inner race track 111 may be provided on a side of the first inner race unit 11 adjacent to the outer race assembly 02 and may be used to house the rolling assemblies 03. The first mounting portion 112 may be provided on a side of the first inner ring unit 11 close to the outer ring assembly 02 and close to the flange unit 13, and may be used to fix an axial position of the seal assembly 04.
The flange unit 13 may include a flange plate 131, a first sidewall 132, and a spline unit 14. The flange 131 may be provided at an end of the flange unit 13 remote from the outer ring assembly 02, may be a disc provided with a plurality of screw holes in an axial direction, and may be connected with a vehicle through bolts, thereby driving the wheel to rotate. The first sidewall 132 may be provided on a side of the flange 131 adjacent to the outer ring assembly 02. The spline unit 14 may extend through the center of the flange unit 13 in the axial direction, may be engaged with a spline (omitted from the drawing) of the drive half shaft, and may transmit torque.
The outer ring assembly 02 may include an outer ring body 21, a first outer ring raceway 22, a second outer ring raceway 23, a third mounting portion 24, and a fourth mounting portion 25. The outer ring body 21 may be an annular body, and may be sleeved on the outer side of the inner ring assembly 01, and spaced from the inner ring assembly 01. The first outer ring raceway 22 may be provided at a position of the outer ring body 21 near the side wall of the inner ring assembly 01 and near the flange unit 13, and the second outer ring raceway 23 may be provided at a position of the outer ring body 21 near the side wall of the inner ring assembly 01 and far from the flange unit 13. The first outer ring raceway 22 and the second outer ring raceway 23 may be disposed at intervals and correspond to the first inner ring raceway 111 and the second inner ring raceway 121, and the rolling elements 03 may be embedded therein. The third mounting portion 24 may be provided at an end of the outer ring body 21 remote from the flange unit 13, the fourth mounting portion 25 may be provided at an end of the outer ring body 21 near the flange unit 13, and the third mounting portion 24 and the fourth mounting portion 25 may be used to mount the seal assembly 04 and fix an axial position of the seal assembly 04.
The rolling assembly 03 may include a first row of balls 31, a first cage 32, a second row of balls 33, a second cage 34, a first rolling accommodation region 35, a second rolling accommodation region 36, and a third rolling accommodation region 37. The first row of balls 31 may be embedded between the first inner ring raceway 111 and the first outer ring raceway 22, so that the friction type between the first row of balls 31 and the first inner ring raceway 111 and the first outer ring raceway 22 is rolling friction, and the rotation smoothness of the hub bearing may be improved. The second row of balls 33 may be embedded between the second inner ring raceway 121 and the second outer ring raceway 23, so that the friction type between the second row of balls 33 and the second inner ring raceway 121 and the second outer ring raceway 23 is rolling friction. The rolling friction can reduce friction resistance between adjacent friction components, reduce torque loss and improve the rotation smoothness of the hub bearing. The first cage 32 may be disposed between the first inner ring raceway 111 and the first outer ring raceway 22 at intervals, so that adjacent first balls 31 may not collide with each other, abnormal wear of the first balls 31 may be avoided, and noise generated during operation of the bearing hub may be reduced. The second cage 34 is disposed between the second inner ring raceway 121 and the second outer ring raceway 23 at intervals, so that adjacent second rows of balls 33 can be prevented from collision with each other, abnormal wear of the second rows of balls 33 can be avoided, and jamming of the hub bearing can be avoided. The first row of balls 31 and the second row of balls 33, the outer ring assembly 02, and the first inner ring unit 11 may surround to form a first rolling accommodation region 35, the first row of balls 31, the seal assembly 04, the fourth mounting portion 25, and the first mounting portion 112 may surround to form a second rolling accommodation region 36, and the second row of balls 33, the other seal device, the third mounting portion 24, and the second mounting portion 122 may surround to form a third rolling accommodation region 37. In the assembling process of the hub bearing, the lubricant can be injected into the first rolling accommodation area 35, the second rolling accommodation area 36 and the third rolling accommodation area 37, so that vibration and noise during the operation of the hub bearing can be reduced, and the stable operation of the hub bearing is ensured.
In some embodiments, as shown in fig. 1 and 2, the second skeleton 421 includes a second support portion 4211 and a second extension portion 4212; the second supporting portion 4211 is in interference fit with the inner peripheral surface of the outer ring assembly 02; the second extending portion 4212 extends from an end of the second supporting portion 4211 away from the flange unit 13 toward a direction approaching the first inner ring unit 11; the second lip 424 includes a second connection 4241, a sealing lip 4242; the second connecting portion 4241 extends from an end of the second extending portion 4212 away from the second supporting portion 4211 toward a direction approaching the first inner ring unit 11; the seal lip 4242 extends obliquely from an end of the second connecting portion 4241 away from the second extending portion 4212 in a direction toward the first inner ring unit 11 and toward the flange unit 13, and an extending end of the seal lip 4242 abuts against the first supporting portion 4111.
In this embodiment, as shown in fig. 1 and 2, the second skeleton 421 may include a second supporting portion 4211 and a second extending portion 4212. The second supporting portion 4211 may be in interference fit with the inner peripheral surface of the outer ring assembly 02, so that the second supporting portion 4211 may be firmly connected to the inner peripheral surface of the outer ring assembly 02 without using any additional connecting member, thereby achieving the purpose of light weight, reducing assembly steps, and reducing production cost. One end of the second extension portion 4212 may be connected with one end of the second support portion 4211 remote from the flange unit 13, and the other end of the second extension portion 4212 may extend in a direction approaching the first inner ring unit 11. The second lip 424 may include a second connection 4241, a sealing lip 4242. One end of the second connection portion 4241 may extend in a direction approaching the first inner ring unit 11 with the second extension portion 4212, and the other end of the second connection portion 4241 may extend in a direction away from the outer ring assembly 02. One end of the seal lip 4242 may be connected to an end close to the first inner ring unit 11 from the second connection portion 4241. The other end of the seal lip 4242 may extend in a direction away from the outer ring assembly 02 and be inclined in a direction toward the first connecting portion 4112, and this end portion may abut on the first support portion 4111 on a side away from the first inner ring unit 11. The seal lip 4242 may be made of rubber, and when the seal lip 4242 contacts the first support portion 4111, the seal lip 4242 may deform due to the material property, and the seal lip 4242 may exert pressure on the first support portion 4111 due to the resilience force. The inclination of the sealing lip 4242 may make itself an inverted triangle, so that deformation is more easily generated, the pressure of the sealing lip 4242 on the first supporting portion 4111 is increased, the sealing formed by the sealing lip 4242 and the first supporting portion 4111 is more firm, and the dust-proof capability is improved. When the contact between the first lip 412 and the second support portion 4211 generates a gap due to aging, foreign matters enter from the contact between the first lip 412 and the second support portion 4211, the seal lip 4242 and the first support portion 4111 can prevent the foreign matters from contacting the rolling assembly 03, and the service life of the hub bearing can be prolonged. The left side region (as shown in fig. 2) of the seal lip 4242 and the first support portion 4111 may be provided with a lubricant, and in this way, the lubricant may be prevented from coming into contact with the first support portion 4111 from the seal lip 4242, and the torque loss during the operation of the hub bearing may be further reduced.
In some embodiments, as shown in fig. 1 and 2, a distance between a side wall of the second connection portion 4241 remote from the flange unit 13 and a side wall of the flange unit 13 is greater than a distance between an end of the first support portion 4111 remote from the flange unit 13 and a side wall of the flange unit 13.
In the present embodiment, as shown in fig. 1 and 2, during rotation of the hub bearing, the lubricant inside the hub bearing may be thrown to the side wall of the second connection portion 4241 away from the first connection portion 4112 by centrifugal force generated by the rotation. The distance between the side wall of the second connecting portion 4241 away from the first connecting portion 4112 and the side wall of the flange unit 13 is greater than the distance between the end of the first supporting portion 4111 away from the first connecting portion 4112 and the side wall of the flange unit 13. By the arrangement, the lubricant on the side wall of the first connecting portion 4112 does not move to the first supporting portion 4111 when moving along the side wall of the first connecting portion 4112, so that the lubricant can be prevented from accumulating at the contact position between the first supporting portion 4111 and the sealing lip 4242, the lubricant can continue to participate in the lubrication of the hub bearing, the seepage probability of the lubricant from the contact position between the first supporting portion 4111 and the sealing lip 4242 is reduced, and the smooth rotation of the hub bearing can be ensured.
In some embodiments, as shown in fig. 1, 2, the second lip 424 further includes a mounting groove 4243; the mounting groove 4243 is provided at a side of the seal lip 4242 remote from the first inner ring unit 11; the second sealing unit 42 includes a constriction 427; the constricted portion 427 is fitted in the mounting groove 4243, and applies a constricting force to the seal lip 4242.
In this embodiment, as shown in fig. 1 and 2, the second lip 424 may further include a mounting groove 4243. The mounting groove 4243 may be provided at a side of the sealing lip 4242 remote from the first support portion 4111. The second sealing unit 42 may include a constriction 427, and the constriction 427 may be a rubber elastic ring or a constriction ring. When the rotating speed of the hub bearing is lower and the service environment of a vehicle provided with the hub bearing is mostly a pavement, the rubber elastic ring can be used, and the cost can be reduced on the premise of ensuring the shrinkage force. When the rotating speed of the hub is high and the service environment of the vehicle provided with the hub bearing is mostly a non-paved road surface, the contraction ring can be used. The constricted portion 427 can be fitted in the mounting groove 4243, and the constriction force is applied to the seal lip 4242, so that the seal lip 4242 can be brought into closer contact with the first support portion 4111, thereby stably preventing the lubricant from being lost and the foreign matter from entering.
In some embodiments, as shown in fig. 1 and 2, the distance between the stress point of the contraction portion 427 applying the contraction force and the side wall of the flange unit 13 is greater than the distance between the sealing lip 4242 and the side wall of the flange unit 13 where the sealing lip 4242 abuts the first support portion 4111.
In this embodiment, as shown in fig. 1 and 2, the distance between the stress point of the contraction portion 427 applying the contraction force and the side wall of the first support portion 4111 may be greater than the distance between the contact portion of the sealing lip 4242 and the first support portion 4111 and the side wall of the first support portion 4111. When the seal lip 4242 abuts against the first support portion 4111, the area where the seal lip 4242 abuts against the first support portion 4111 can be made larger, and the lubricant can be further prevented from running off and the entry of foreign matter, so that the hub bearing can be made more stable in operation.
In some embodiments, as shown in fig. 1, 2, the second sealing unit 42 further includes a first boss 425; the first protruding portion 425 extends from one end of the second extending portion 4212 away from the second supporting portion 4211 toward the direction approaching the rolling assembly 03; the distance between the extending end of the first protruding portion 425 and the side wall of the flange unit 13 is greater than the distance between the end of the first supporting portion 4111, which is far away from the flange unit 13, and the side wall of the flange unit 13.
In this embodiment, as shown in fig. 1 and 2, the second sealing unit 42 may further include a first protrusion 425. One end of the first protruding portion 425 may be connected to one end of the second extending portion 4212 remote from the first connecting portion 4112, and the other end of the first protruding portion 425 may extend in a direction remote from the first connecting portion 4112. The distance between the extending end of the first protruding portion 425 and the side wall of the first connecting portion 4112 may be greater than the distance between the end of the first supporting portion 4111 away from the first connecting portion 4112 and the side wall of the first connecting portion 4112. In this way, when the lubricant is thrown to the side wall of the second extension portion 4212 away from the first connection portion 4112 by the centrifugal force generated by the rotation of the hub bearing, the lubricant moves along the side wall of the second extension portion 4212 away from the first connection portion 4112, the first protrusion portion 425 may reduce the movement of the lubricant to the contact position of the first support portion 4111 and the seal lip 4242, and the lubricant may be prevented from being gathered at the contact position of the first support portion 4111 and the seal lip 4242, so that the lubricant participates in the lubrication of the hub bearing, and the hub bearing rotates smoothly.
In some embodiments, as shown in fig. 1 and 2, the extended end of the first boss 425 is spaced from the rolling assembly 03 by 0.3mm to 0.5mm.
In this embodiment, as shown in fig. 1 and 2, an end of the first protruding portion 425 away from the first supporting portion 4111 may be spaced from the rolling assembly 03 by 0.3mm to 0.5mm. When the lubricant moves along the side wall of the second extending portion 4212 away from the first supporting portion 4111 to the side wall of the first protruding portion 425 close to the second supporting portion 4211, and then moves to the end of the first protruding portion 425 away from the first supporting portion 4111, the lubricant can be adsorbed onto the surface of the rolling assembly 03 by the small-pitch arrangement, and the lubricant can directly participate in lubrication, so that the smoothness of rotation of the hub bearing can be effectively improved and the loss of the lubricant can be reduced.
In some embodiments, as shown in fig. 1, 2, the second sealing unit 42 further includes a second boss 426; the second boss 426 extends from the side of the second extension 4212 away from the flange unit 13 toward the direction approaching the rolling assembly 03; the second boss 426 is disposed in the space between the first boss 425 and the outer race assembly 02; the extended end of the second protrusion 426 is spaced from the sidewall of the flange unit 13 more than the extended end of the first protrusion 425.
In this embodiment, as shown in fig. 1 and 2, the second sealing unit 42 may further include a second boss 426. One end of the second protrusion 426 may be connected to one end of the second extension portion 4212 remote from the first connection portion 4112, and the other end of the second protrusion 426 may extend in a direction remote from the first connection portion 4112. The second boss 426 may be disposed in a space between the first boss 425 and the outer race assembly 02. The distance between the extending end of the second protruding portion 426 and the side wall of the first connecting portion 4112 may be greater than the distance between the end of the second protruding portion 426 away from the first connecting portion 4112 and the side wall of the first connecting portion 4112, and the extending end of the second protruding portion 426 may be located in the radial projection area of the rolling assembly 03. When the lubricant is thrown to the side wall of the second supporting portion 4211 away from the first connecting portion 4112 by the centrifugal force generated by the rotation of the hub bearing, the lubricant moves along the side wall to the side wall of the second protruding portion 426 close to the second supporting portion 4211, and then moves to the end of the second protruding portion 426 away from the first supporting portion 4111, the lubricant can directly drop onto the surface of the rolling assembly 03 to participate in lubrication, so that the hub bearing can run smoothly.
In some embodiments, as shown in fig. 1 and 2, the second sealing unit 42 further includes a first dust-proof portion 422; the first dust-proof portion 422 extends obliquely from the side of the second extending portion 4212 near the flange unit 13 toward the direction near the first extending portion 4113; the extending end of the first dust-proof part 422 is spaced from the first extending part 4113; the first dust prevention portion 422 is spaced apart from the seal lip 4242.
In the present embodiment, as shown in fig. 1 and 2, the second sealing unit 42 may further include a first dust prevention part 422. One end of the first dust-proof portion 422 may be connected to a side of the second extending portion 4212 adjacent to the first supporting portion 4111, and the other end of the first dust-proof portion 422 may extend in a direction adjacent to the first supporting portion 4111 and may be inclined in a direction adjacent to the second supporting portion 4211 while being spaced apart from the first extending portion 4113. The inclined extension ends of the first dust preventing parts 422 may be spaced apart from the first extension parts 4113 by a small distance. This structure can form a pocket portion between the dust-proof portion and the second extending portion 4212, which is opened in the direction of the second extending portion 4212. When the contact between the first lip 412 and the second support portion 4211 generates a gap due to aging, the foreign matter enters from the gap, the pocket between the dust-proof portion and the second extension portion 4212 can provide a buffer space for the foreign matter, the foreign matter is temporarily stored in the pocket, the small distance between the inclined extension end of the first dust-proof portion 422 and the first extension portion 4113 can reduce the further penetration of the foreign matter without affecting the rotation of the hub bearing, and the foreign matter is discharged from the contact between the first lip 412 and the second support portion 4211 along with the rotation of the hub bearing. And because of the specific extending and tilting direction of the first lip 412, a horn shape with an opening to the left (as shown in fig. 2) can be formed, making it difficult for foreign matter to enter and exit.
In some embodiments, as shown in fig. 1 and 2, the second backbone 421 further includes a third extension 4213; the third extension portion 4213 extends from an end of the second support portion 4211 away from the second extension portion 4212 toward a direction away from the first inner ring unit 11; the side wall of the third extension 4213 is abutted with the end face of the outer ring assembly 02; the second sealing unit 42 further includes a second dust-proof portion 423; the second dust-proof portion 423 extends from one end of the third extension portion 4213 away from the second support portion 4211 toward the flange unit 13, and an extension end of the second dust-proof portion 423 is disposed at a distance from the flange unit 13.
In this embodiment, as shown in fig. 1 and 2, the second skeleton 421 may further include a third extension portion 4213. One end of the third extension portion 4213 is connected to one end of the second support portion 4211 away from the first support portion 4111, the other end of the third extension portion 4213 may extend in a direction away from the first support portion 4111, and a side wall of the third extension portion 4213 away from the flange unit 13 may abut against an end surface of the outer ring assembly 02 close to the flange unit 13, so that fixing of the third extension portion 4213 may be more stable. The second sealing unit 42 may further include a second dust prevention portion 423. One end of the second dust preventing portion 423 may be connected to one end of the third extending portion 4213 remote from the first supporting portion 4111, the other end of the second dust preventing portion 423 may extend in the direction of the flange unit 13, and the extending end of the second dust preventing portion 423 may be spaced apart from the flange unit 13 by a small distance. In this way, when the hub bearing rotates, foreign matters can be reduced from entering the inside of the hub bearing under the condition of not interfering the rotation of the hub bearing, so that the hub bearing runs stably and smoothly, the running safety of a vehicle can be ensured, and the power loss of the vehicle during running is reduced.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples of implementing the disclosure, and that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure.

Claims (5)

1. A hub bearing, said hub bearing comprising:
the inner ring assembly comprises a first inner ring unit and a flange unit; one end of the first inner ring unit is fixedly connected with the flange unit;
the outer ring assembly is sleeved on the outer periphery side of the first inner ring unit;
the rolling assembly is arranged in a space surrounded by the outer ring assembly and the first inner ring unit;
the sealing assembly is arranged on one side, close to the flange unit, of the rolling assembly; the sealing assembly comprises a first sealing unit and a second sealing unit; the first sealing unit comprises a first framework and a first lip; the first framework comprises a first supporting part, a first connecting part and a first extending part; the first supporting part, the first connecting part and the first extending part are sequentially and fixedly connected; the first supporting part is in interference fit with the outer peripheral surface of the first inner ring unit; the first connecting part extends from one end of the first supporting part, which is close to the flange unit, towards the position, which is far away from the first inner ring unit, and the first connecting part is arranged at intervals with the flange unit; the first extension part extends from one end of the first connection part towards a direction away from the flange unit; one end of the first lip part is fixedly connected with the first extension part, and the other end of the first lip part obliquely extends towards a direction away from the first extension part and close to the flange unit; the second sealing unit comprises a second framework and a second lip; the second framework is in interference fit with the inner peripheral surface of the outer ring assembly; one end of the first lip part far away from the first extension part is abutted with the second framework; one end of the second lip is fixedly connected with one end of the second framework, and the other end of the second lip extends towards the direction close to the first supporting part and is abutted against the first supporting part;
the second framework comprises a second supporting part and a second extending part; the second supporting part is in interference fit with the inner peripheral surface of the outer ring assembly; the second extension part extends from one end of the second support part away from the flange unit towards the direction approaching the first inner ring unit; the second lip comprises a second connecting part and a sealing lip; the second connecting part extends from one end of the second extending part away from the second supporting part towards the direction approaching the first inner ring unit; the sealing lip obliquely extends from one end of the second connecting part far away from the second extending part towards a direction close to the first inner ring unit and close to the flange unit, and the extending end of the sealing lip is abutted with the first supporting part;
the second sealing unit further includes a first boss; the first protruding part extends from one end of the second extending part away from the second supporting part towards the direction approaching the rolling assembly; the distance between the extending end of the first protruding part and the side wall of the flange unit is larger than the distance between the end, away from the flange unit, of the first supporting part and the side wall of the flange unit;
the distance between the extending end of the first protruding part and the rolling assembly is 0.3mm-0.5mm;
the second sealing unit further includes a second boss; the second protruding part extends from one side of the second extending part away from the flange unit towards the direction approaching the rolling assembly; the second protruding part is arranged in a space between the first protruding part and the outer ring component; the distance between the second protruding part extending end and the side wall of the flange unit is larger than that between the first protruding part extending end and the side wall of the flange unit;
the second armature further comprises a third extension; the third extension part extends from one end of the second supporting part away from the second extension part towards the direction away from the first inner ring unit; the side wall of the third extension part is abutted with the end face of the outer ring assembly; the second sealing unit further comprises a second dust prevention part; the second dustproof part extends from one end of the third extension part away from the second supporting part towards the flange unit, and the extending end of the second dustproof part is arranged at intervals with the flange unit.
2. A hub bearing according to claim 1, wherein,
the distance between the side wall of the second connecting part far away from the flange unit and the side wall of the flange unit is larger than that between one end of the first supporting part far away from the flange unit and the side wall of the flange unit.
3. A hub bearing according to claim 1, wherein,
the second lip further includes a mounting groove; the mounting groove is arranged on one side of the sealing lip, which is far away from the first inner ring unit; the second sealing unit includes a constriction; the contraction part is sleeved in the mounting groove and applies contraction force to the sealing lip.
4. A hub bearing according to claim 3, wherein,
the distance between the stress point of the contraction part exerting the contraction force and the side wall of the flange unit is larger than the distance between the position, where the sealing lip abuts against the first supporting part, and the side wall of the flange unit.
5. A hub bearing according to claim 1, wherein,
the second sealing unit further comprises a first dust prevention part; the first dust-proof part obliquely extends from one side of the second extending part close to the flange unit towards the direction close to the first extending part; the first dust-proof part extending end is arranged at intervals with the first extending part; the first dust-proof portion is disposed at an interval from the seal lip.
CN202311349958.7A 2023-10-18 2023-10-18 Hub bearing Active CN117072552B (en)

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CN115479085A (en) * 2021-05-31 2022-12-16 斯凯孚公司 Sealing device for bearing unit
CN218953844U (en) * 2022-11-15 2023-05-02 浙江固耐橡塑科技有限公司 Combined labyrinth sealing device for sealing hub bearing
CN219035341U (en) * 2022-09-22 2023-05-16 人本股份有限公司 Sealing structure of hub bearing

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1193961A (en) * 1997-09-24 1999-04-06 Koyo Chicago Lowhide Kk Seal device
EP1650481A1 (en) * 2004-10-20 2006-04-26 RFT S.p.A. A sealing device for bearings
CN102066791A (en) * 2008-06-25 2011-05-18 内山工业株式会社 Bearing seal
KR20130053640A (en) * 2011-11-15 2013-05-24 주식회사 일진글로벌 Sealing apparatus of wheel bearing
KR20140071166A (en) * 2012-12-03 2014-06-11 현대모비스 주식회사 Encoder seal of hub bearing for vehicles
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CN212564081U (en) * 2020-02-19 2021-02-19 浙江万向精工有限公司 Magnetic sealing assembly for end face gear hub bearing unit
CN212928533U (en) * 2020-04-27 2021-04-09 一汽-大众汽车有限公司 Sealing device for hub bearing and hub bearing
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CN219035341U (en) * 2022-09-22 2023-05-16 人本股份有限公司 Sealing structure of hub bearing
CN218953844U (en) * 2022-11-15 2023-05-02 浙江固耐橡塑科技有限公司 Combined labyrinth sealing device for sealing hub bearing

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