CN213088501U

CN213088501U - Wheel hub bearing that leakproofness is good

Info

Publication number: CN213088501U
Application number: CN202021879318.9U
Authority: CN
Inventors: 朱维平
Original assignee: Zhejiang Hengding Machinery Co ltd
Current assignee: Zhejiang Hengding Machinery Co ltd
Priority date: 2020-09-01
Filing date: 2020-09-01
Publication date: 2021-04-30
Anticipated expiration: 2030-09-01

Abstract

The utility model discloses a wheel hub bearing, aiming at providing a wheel hub bearing with good sealing performance, the technical proposal is that the wheel hub bearing with good sealing performance comprises a wheel hub, an outer ring and an inner ring, one end of the wheel hub is provided with a flange, the wheel hub is provided with a through hole penetrating through the wheel hub, the inner ring comprises a left half ring, a right half ring and a fixed hoop, the left half ring and the right half ring are fixed through the fixed hoop, a sealing device is arranged between the left half ring and the right half ring, the sealing device comprises a first sealing ring, a second sealing ring and a fixed ring, two half ring grooves are arranged on the contact surface of the left half ring and the right half ring, a retainer is arranged near the middle part between the outer ring and the inner ring, rollers are arranged in the retainer, a sealing element is arranged between the outer ring and one end of the flange of the wheel hub, the sealing element comprises an annular support and a, all be provided with a plurality of barbs on two sealed sheathes, the utility model is suitable for an auto-parts technical field.

Description

Wheel hub bearing that leakproofness is good

Technical Field

The utility model belongs to the technical field of auto-parts, refer in particular to a wheel hub bearing that the leakproofness is good.

Background

The hub bearing is one of key parts of an automobile, has the main functions of bearing weight and providing accurate guide for the rotation of a hub, and is a very important part on an axle.

Disclosure of Invention

Not enough to prior art exists, the utility model aims to provide a wheel hub bearing that the leakproofness is good.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a wheel hub bearing that leakproofness is good, includes wheel hub, outer lane and inner circle, wheel hub one end is provided with the flange, wheel hub is provided with the through-hole that runs through it, characterized by: the inner ring comprises a left half ring, a right half ring and a fixed hoop, the left half ring and the right half ring are fixed through the fixed hoop, a sealing device is arranged between the left half ring and the right half ring and comprises a first sealing ring, a second sealing ring and a fixed ring, two semi-circular grooves are arranged on the contact surface of the left half ring and the right half ring, the first sealing ring is arranged in the semi-circular grooves in a sliding connection mode, the section of the first sealing ring is a third circle, the openings of the two semi-circular grooves are oppositely and vertically staggered, the second sealing ring is positioned at the upper end face of a gap between the left half ring and the right half ring and is fixed through the fixed ring, the outer ring is sleeved on the outer side of the inner ring, a retainer is arranged between the outer ring and the inner ring by the middle part, rollers are arranged in the retainer, and a sealing element is arranged between the outer ring and one end of a flange of the hub, the sealing member includes that the cross-section is the ring carrier and the seal cover of L shape, the ring carrier be two, one with outer lane fixed connection, another with wheel hub flange end fixed connection, two the mutual lock of ring carrier just all overlaps there is the seal cover, the seal cover with ring carrier fixed connection, two all be provided with a plurality of barbs, two on the seal cover the crisscross grafting of barb.

By adopting the technical scheme, the sealing performance between the left half ring and the right half ring can be improved, when the hub bearing vibrates to cause axial play, the fixing hoop can play a role of fixing the left half ring and the right half ring to prevent overlarge gap between the left half ring and the right half ring, the second sealing ring can prevent lubricating oil in the second sealing ring from seeping out from the gap between the left half ring and the right half ring, the second sealing ring is fixed through the fixing ring, the first sealing ring in the half ring groove slides downwards along the inner wall of the half ring groove, one part of the first sealing ring is turned into the half ring groove of the opposite surface, the gap is shielded to a certain degree, the leakage of oil caused by slight deviation of the left half ring and the right half ring is avoided, the sealing performance is improved, and the structure is simple; the leakproofness of wheel hub bearing is further improved to the sealing member between the flange end of outer lane and wheel hub, and the barb on the ring carrier looks lock and two relative seal covers is crisscross pegged graft each other, and when taking place slight axial skew, two barb interact improve the leakproofness between the flange end of outer lane and wheel hub, prevent that lubricating oil from oozing out and outside dust from getting into to cause the damage to wheel hub bearing.

The utility model discloses further set up to: the outer ring is internally provided with an air passage, the outer ring and the inner ring form a roller path, the two ends of the roller path are both provided with sealing rings with I-shaped sections, the sealing rings are embedded between the outer ring and the inner ring, the sealing rings and the outer ring form a cavity, the air passage is communicated with the cavity, the air passage penetrates through the outer surface of the outer ring and extends out of the outer surface of the outer ring, the outer surface close to the outer ring in the air passage is provided with an one-way breathable film, the outlet of the air passage is provided with a rubber plug, the sealing rings are arranged at the two ends of the roller path to prevent lubricating oil from seeping out and external dust from entering, air is pumped into the cavity through the air passage by an air pump, so that the external air pressure of the sealing ring is greater than the air pressure in the, when the rubber plug is installed, gas runs into the air passage, and the rubber cover is arranged on the rubber plug to achieve the effects of fixing and secondary sealing.

The utility model discloses further set up to: the sealing ring is internally and fixedly provided with an annular fixing plate, and the structural stability of the sealing ring is improved through the annular fixing plate.

The utility model discloses further set up to: the inner ring is far away from one side of a flange end of the hub is provided with a fastening nut, the fastening nut is in threaded connection with the hub, the fastening nut is close to one side of the inner ring and is provided with an annular groove, a damping device is arranged in the annular groove and comprises a spring and two baffles, the two baffles are fixedly connected to the two ends of the spring respectively, the inner ring is fixed through the fastening nut, the inner ring is not easy to loosen, and the damping device can prevent the fastening nut from loosening when the hub bearing vibrates.

The utility model discloses further set up to: the flange of wheel hub serves and is provided with the fixed orifices, be provided with the bolt in the fixed orifices, wheel hub's flange terminal surface is close to the embedded magnet that is provided with of one side of bolt head, through setting up magnet, can prevent that magnet from droing in the installation, work efficiency when improving the installation.

Drawings

Fig. 1 is a cross-sectional view of the present invention;

FIG. 2 is an enlarged view of the point A of FIG. 1 according to the present invention;

FIG. 3 is an enlarged view of the point B of FIG. 1 according to the present invention;

FIG. 4 is an enlarged view of the present invention at C in FIG. 1;

in the drawings: 1. a hub; 2. an outer ring; 3. an inner ring; 30. a left half turn; 31. a right half turn; 4. a through hole; 5. A semi-circular groove; 6. a first seal ring; 7. a second seal ring; 8. a fixing ring; 9. an annular support; 10. sealing sleeves; 11. a barb; 12. an airway; 13. a seal ring; 14. a cavity; 15. a unidirectional breathable film; 16. a rubber plug; 17. an annular fixed plate; 18. fastening a nut; 19. an annular groove; 20. a spring; 21. a baffle plate; 22. a fixing hole; 23. a bolt; 24. a magnet; 25. a holder; 26. a roller; 27. and fixing the hoop.

Detailed Description

The invention is further described in the following with reference to fig. 1 to 4 in a specific embodiment:

the utility model provides a wheel hub bearing that leakproofness is good, includes wheel hub 1, outer lane 2 and inner circle 3, wheel hub 1 one end is provided with the flange, wheel hub 1 is provided with runs through-hole 4 in it, be provided with air flue 12 in the outer lane 2, outer lane 2 with form the raceway between the inner circle 3, the both ends of raceway all are provided with the sealing ring 13 that the cross-section is worker's shape, establish in the sealing ring 13 is embedded between outer lane 2 and the inner circle 3, sealing ring 13 with form cavity 14 between the outer lane 2, air flue 12 with cavity 14 communicates with each other, air flue 12 runs through the outer surface of outer lane 2 and extends the outer surface of outer lane 2, the surface that is close to outer lane 2 in air flue 12 is provided with one-way ventilated membrane 15, the export of air flue 12 is provided with rubber buffer 16, the inner ring 3 comprises a left half ring 30, a right half ring 31 and a fixed hoop 27, the left half ring 30 and the right half ring 31 are fixed through the fixed hoop 27, a sealing device is arranged between the left half ring 30 and the right half ring 31 and comprises a first sealing ring 6, a second sealing ring 7 and a fixed ring 8, two semi-circular grooves 5 are arranged on the contact surface of the left half ring 30 and the right half ring 31, the first sealing ring 6 is arranged in the semi-circular grooves 5 in a sliding connection mode, the section of the first sealing ring 6 is a third circle, the openings of the two semi-circular grooves 5 are oppositely and staggered up and down, the second sealing ring 7 is positioned on the upper end surface of a gap between the left half ring 30 and the right half ring 31 and is fixed through the fixed ring 8, the outer ring 2 is sleeved on the outer side of the inner ring 3, and a retainer 25 is arranged between the outer ring 2 and the inner ring 3 by the middle part, the wheel hub sealing structure is characterized in that rollers 26 are arranged in the retainer 25, a sealing element is arranged between the outer ring 2 and one end of a flange of the wheel hub 1, the sealing element comprises two annular supports 9 and two sealing sleeves 10, the cross section of each annular support 9 is L-shaped, one annular support is fixedly connected with the outer ring 2, the other annular support is fixedly connected with the flange of the wheel hub 1, the two annular supports 9 are mutually buckled and are both sleeved with the sealing sleeves 10, the sealing sleeves 10 are fixedly connected with the annular supports 9, a plurality of barbs 11 are arranged on the two sealing sleeves 10, and the barbs 11 on the two sealing sleeves 10 are in staggered insertion connection; a fastening nut 18 is arranged on one side, away from the flange end of the hub 1, of the inner ring 3, the fastening nut 18 is in threaded connection with the hub 1, an annular groove 19 is formed in one side, close to the inner ring 3, of the fastening nut 18, a damping device is arranged in the annular groove 19, the damping device comprises springs 20 and baffle plates 21, and the two baffle plates 21 are fixedly connected to two ends of the springs 20 respectively; the flange end of the wheel hub 1 is provided with a fixing hole 22, a bolt 23 is arranged in the fixing hole 22, and a magnet 24 is embedded in one surface, close to the head of the bolt 23, of the flange end surface of the wheel hub 1.

It can be seen from the above structure that the sealing performance between the left half-ring 30 and the right half-ring 31 can be improved by the arranged sealing device, when the hub 1 bearing vibrates to cause axial play, the fixing hoop 27 can play a role of fixing the left half-ring 30 and the right half-ring 31 to prevent an overlarge gap between the left half-ring 30 and the right half-ring 31, the second sealing ring 7 can prevent the internal lubricating oil from seeping out from the gap between the left half-ring 30 and the right half-ring 31, the second sealing ring 7 is fixed by the fixing ring 8, the first sealing ring 6 in the half-ring groove 5 slides downwards along the inner wall of the half-ring groove 5, and one part of the first sealing ring is rotated into the half-ring groove 5 of the opposite surface, so that the gap is shielded to a certain degree, the leakage of the oil caused by slight deviation of the left half-ring 30 and the right half-ring; the sealing element between the outer ring 2 and the flange end of the hub 1 further improves the sealing performance of the bearing of the hub 1, the annular support 9 is buckled, the barbs 11 on the two opposite sealing sleeves 10 are mutually staggered and inserted, when slight axial deviation occurs, the two barbs 11 interact with each other, the sealing performance between the outer ring 2 and the flange end of the hub 1 is improved, and lubricating oil seepage and external dust entering are prevented, so that the bearing of the hub 1 is damaged; the sealing rings 13 are arranged at two ends of the roller path to prevent lubricating oil from seeping and external dust from entering, the air pump is used for pumping air into the cavity 14 through the air passage 12, so that the external air pressure of the sealing rings 13 is greater than the air pressure in the cavity 14, the sealing rings 13 are respectively embedded and connected with the outer ring 2 and the inner ring 3 more tightly, the annular fixing plate 17 is used for increasing the structural stability of the sealing rings 13, the one-way breathable film 15 in the air passage 12 can prevent air from leaking into the air passage 12 when the rubber plug 16 is installed when air pumping is finished, the rubber cover is arranged on the rubber plug 16 to play a role of fixing and secondary sealing, the fastening nut 18 is used for fixing the inner ring 3 to prevent the inner ring 3 from loosening, and the damping device can; the magnet 24 arranged on the flange end surface of the hub 1 can prevent the magnet 24 from falling off during installation, and the work efficiency during installation is improved.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a wheel hub bearing that leakproofness is good, includes wheel hub (1), outer lane (2) and inner circle (3), wheel hub (1) one end is provided with the flange, wheel hub (1) is provided with through-hole (4) that run through in it, characterized by: the inner ring (3) comprises a left half ring (30), a right half ring (31) and a fixed hoop (27), the left half ring (30) and the right half ring (31) are fixed through the fixed hoop (27), a sealing device is arranged between the left half ring (30) and the right half ring (31) and comprises a first sealing ring (6), a second sealing ring (7) and a fixed ring (8), two semi-circular grooves (5) are arranged on the contact surface of the left half ring (30) and the right half ring (31), the first sealing ring (6) is in sliding connection with the semi-circular grooves (5), the cross section of the first sealing ring (6) is one third of a circle, the openings of the two semi-circular grooves (5) are oppositely and vertically staggered, the second sealing ring (7) is positioned on the upper end surface of a gap between the left half ring (30) and the right half ring (31) and is fixed through the fixed ring (8), the outer ring (2) is sleeved outside the inner ring (3), a retainer (25) is arranged between the outer ring (2) and the inner ring (3) near the middle part, a roller (26) is arranged in the retainer (25), a sealing element is arranged between the outer ring (2) and one end of the flange of the hub (1), the sealing element comprises an annular bracket (9) with an L-shaped section and a sealing sleeve (10), the two annular supports (9) are fixedly connected with the outer ring (2), the other annular support is fixedly connected with the flange end of the wheel hub (1), the two annular supports (9) are mutually buckled and are both sleeved with the sealing sleeve (10), seal cover (10) with ring carrier (9) fixed connection, two all be provided with a plurality of barbs (11), two on seal cover (10) barb (11) are crisscross to be pegged graft.

2. The hub bearing with good sealing performance as claimed in claim 1, wherein: be provided with air flue (12) in outer lane (2), outer lane (2) with form the raceway between inner circle (3), the both ends of raceway all are provided with sealing ring (13) that the cross-section is worker's shape, establish in sealing ring (13) embedded outer lane (2) with between inner circle (3), sealing ring (13) with vacuole formation (14) between outer lane (2), air flue (12) with cavity (14) communicate with each other, air flue (12) run through outer lane (2) surface just extends outer lane (2) surface, the surface that is close to outer lane (2) in air flue (12) is provided with one-way ventilated membrane (15), the export of air flue (12) is provided with rubber buffer (16).

3. The hub bearing with good sealing performance as claimed in claim 2, wherein: an annular fixing plate (17) is fixedly arranged inside the sealing ring (13).

4. The hub bearing with good sealing performance as claimed in claim 1, wherein: the inner ring (3) is far away from one side of a flange end of the hub (1) is provided with a fastening nut (18), the fastening nut (18) is in threaded connection with the hub (1), the fastening nut (18) is close to one side of the inner ring (3) is provided with an annular groove (19), a damping device is arranged in the annular groove (19), the damping device comprises a spring (20) and two baffles (21), and the two baffles (21) are fixedly connected to the two ends of the spring (20) respectively.

5. The hub bearing with good sealing performance as claimed in claim 1, wherein: the flange end of the wheel hub (1) is provided with a fixing hole (22), a bolt (23) is arranged in the fixing hole (22), and a magnet (24) is embedded in one surface, close to the head of the bolt (23), of the flange end surface of the wheel hub (1).