CN-121977014-A - Automobile hub bearing unit capable of radiating and lubricating

CN121977014ACN 121977014 ACN121977014 ACN 121977014ACN-121977014-A

Abstract

The invention discloses a heat-dissipating and lubricating automobile hub bearing unit which comprises a bearing body and a heat-dissipating module, wherein the bearing body adopts a double-row roller bearing and comprises an inner ring, an outer ring, a retainer, 2M rollers, a first sealing ring and a second sealing ring, and the heat-dissipating module comprises a shell, a partition plate, a liquid inlet pipe and a liquid outlet pipe. The outer ring is fixed with the frame, the inner ring is connected with the hub, the bearing inner ring is provided with the circulating lubrication structure, the continuous lubrication is realized by forming an oil storage-oil supplement-lubrication-backflow closed loop, meanwhile, the bearing outer ring is provided with the heat dissipation structure, the service life of the bearing can be effectively prolonged through heat pipe phase change and natural heat dissipation multipath efficient heat dissipation, and the driving safety and stability are improved.

Inventors

LIN FEN
LIU CHENXI
WANG HAORAN
WANG YONGQI

Assignees

南京航空航天大学

Dates

Publication Date: 20260505
Application Date: 20260226

Claims (6)

1. The automobile hub bearing unit is characterized by comprising a bearing body and a heat dissipation module; The bearing body adopts a double-row roller bearing and comprises an inner ring, an outer ring, a retainer, 2M rollers, a first sealing ring and a second sealing ring, wherein M is a natural number greater than or equal to 3; the outer ring is provided with a third limit groove and a fourth limit groove which are annular, wherein the third limit groove and the first limit groove are matched to form a first rollaway nest, and the fourth limit groove and the second limit groove are matched to form a second rollaway nest; the retainer adopts a double-row roller retainer, 2 rows of limit through grooves are circumferentially arranged on the retainer, and each row of the retainer comprises M limit through grooves which are circumferentially and uniformly arranged; The 2M rollers are arranged in the 2M fiber through grooves of the retainer in a one-to-one correspondence manner; The retainer is arranged between the inner ring and the outer ring, rollers in one row of limiting through grooves on the retainer are positioned in the first roller path, and rollers in the other row of limiting through grooves are positioned in the second roller path, so that the inner ring and the outer ring can rotate freely; the first sealing ring and the second sealing ring are arranged between the inner ring and the outer ring and are respectively positioned at two sides of the retainer; an annular cavity is formed in the inner ring and used as an oil storage tank for storing lubricating oil; N oil supplementing channels communicated with the oil storage groove are uniformly arranged on the outer wall of the inner ring between the first limit groove and the second limit groove in the circumferential direction, wherein N is a natural number greater than or equal to 3, and the oil supplementing channels are arc-shaped and are used for outputting lubricating oil in the oil storage groove to the first rollaway nest and the second rollaway nest when the bearing inner ring rotates; The oil return channels and the oil supplementing channels are alternately arranged at intervals, the oil return channels comprise at least 1 bending structure, and the cross section area of the oil return channels is gradually reduced from one end at the outer side to one end at the inner side so as to prevent lubricating oil in the oil storage tank from reversely flowing out due to centrifugal force when the inner ring rotates; P groups of mounting grooves are equidistantly formed in the outer wall of the outer ring along the radial direction, each group of mounting grooves comprises Q mounting grooves, P is a natural number greater than or equal to 1, and Q is a natural number greater than or equal to 3; the heat dissipation module comprises a shell, a partition plate, a liquid inlet pipe and a liquid outlet pipe; The shell comprises a side plate, a first end plate and a second end plate, wherein the side plate is a hollow cylinder with two open ends, the first end plate and the second end plate have the same structure and are annular plates, the outer walls of the first end plate and the second end plate are respectively and coaxially sealed and fixedly connected with the two ends of the side wall, the inner walls of the first end plate and the second end plate are respectively and coaxially sealed and fixedly connected with the outer wall of the outer ring, and P.Q heat pipes are contained in the shell; The liquid inlet pipe and the liquid outlet pipe extend into the shell from the outside and are positioned at two sides of the partition plate, wherein the liquid inlet pipe is used for inputting cooling liquid, so that the cooling liquid flows out from the liquid outlet pipe after flowing to the other side of the partition plate around the outer wall of the outer ring. The heat dissipation device comprises a cooling oil groove, a cooling oil inlet and a cooling oil outlet, wherein the cooling oil inlet is formed in the surface of the cooling oil groove, and the cooling oil outlet is formed in the other side of the cooling oil groove.
2. The heat dissipating and lubricating automotive bearing unit of claim 1, wherein both ends of the oil compensating passage are provided as fillets.
3. The heat dissipating and lubricating automotive bearing unit of claim 1, wherein N is 7.
4. The heat-dissipating and lubricating automobile bearing unit according to claim 1, wherein the outer wall of the inner ring is provided with oil retaining ribs corresponding to the oil return channels one by one, and the oil retaining ribs are in a protruding shape and are used for guiding lubricating oil to flow into the oil return channels from one end of the outer side of the corresponding oil return channel.
5. The heat dissipating and lubricating automotive bearing unit of claim 1, wherein Q is 10 and p is 5.
6. The heat dissipating and lubricating automotive bearing unit of claim 1, wherein the housing and the separator are both made of aluminum alloy.

Description

Automobile hub bearing unit capable of radiating and lubricating Technical Field The invention relates to the field of hub bearings, in particular to a heat-dissipating and lubricating automobile hub bearing unit. Background In the mechanical field, a bearing is a key part for supporting a mechanical rotating body, reducing friction coefficient and guaranteeing rotation precision, and an automobile hub bearing is an important category, is a core part of an automobile transmission system, and is required to bear radial load and bearing load, accurately guide the rotation of a hub and transmit automobile output torque, and directly influences the safety and reliability of running of a vehicle. The existing automobile hub bearing unit can generate a large amount of heat in the working process, and if the heat cannot be effectively dissipated in time, the service life of the bearing and the safety of the running of a vehicle can be influenced. Meanwhile, the conventional bearing unit has a disadvantage in lubrication, and it is difficult to ensure the continuity and stability of the lubrication effect. In the existing heat dissipation technology, natural heat dissipation depends on the natural convection of the ventilation structure of the hub and air, is obviously influenced by factors such as ambient temperature, vehicle speed and the like, has limited heat dissipation efficiency, and forced convection heat dissipation enhances the heat dissipation effect by means of structures such as fans, air channels and the like, but additionally increases the complexity, weight and energy consumption of the system, and is easy to fail due to the problems of air channel blockage, fan faults and the like caused by foreign matters under complex road conditions. In addition, the traditional lubrication mode is difficult to maintain stable lubrication performance under the working condition of high temperature and high load, effective lubrication cannot be continuously provided for the bearing, so that the abrasion of the bearing is aggravated, and the service life and the working reliability of the bearing are influenced. In view of the above-mentioned problems, there is a need to design a novel bearing unit capable of both heat dissipation and lubrication, so as to improve the working efficiency and reliability of the automobile hub bearing and meet the increasing demands of high-performance automobile parts. Disclosure of Invention The invention aims to solve the technical problem of providing a heat dissipation and lubrication automobile hub bearing unit aiming at the defects related to the background technology. The invention adopts the following technical scheme for solving the technical problems: A heat-dissipating and lubricating automobile hub bearing unit comprises a bearing body and a heat-dissipating module; The bearing body adopts a double-row roller bearing and comprises an inner ring, an outer ring, a retainer, 2M rollers, a first sealing ring and a second sealing ring, wherein M is a natural number greater than or equal to 3; the outer ring is provided with a third limit groove and a fourth limit groove which are annular, wherein the third limit groove and the first limit groove are matched to form a first rollaway nest, and the fourth limit groove and the second limit groove are matched to form a second rollaway nest; the retainer adopts a double-row roller retainer, 2 rows of limit through grooves are circumferentially arranged on the retainer, and each row of the retainer comprises M limit through grooves which are circumferentially and uniformly arranged; The 2M rollers are arranged in the 2M fiber through grooves of the retainer in a one-to-one correspondence manner; The retainer is arranged between the inner ring and the outer ring, rollers in one row of limiting through grooves on the retainer are positioned in the first roller path, and rollers in the other row of limiting through grooves are positioned in the second roller path, so that the inner ring and the outer ring can rotate freely; the first sealing ring and the second sealing ring are arranged between the inner ring and the outer ring and are respectively positioned at two sides of the retainer; an annular cavity is formed in the inner ring and used as an oil storage tank for storing lubricating oil; N oil supplementing channels communicated with the oil storage groove are uniformly arranged on the outer wall of the inner ring between the first limit groove and the second limit groove in the circumferential direction, wherein N is a natural number greater than or equal to 3, and the oil supplementing channels are arc-shaped and are used for outputting lubricating oil in the oil storage groove to the first rollaway nest and the second rollaway nest when the bearing inner ring rotates; The oil return channels and the oil supplementing channels are alternately arranged at intervals, the oil return channels comprise at least 1 bending structure,