阅读说明：本技术 沟道与滚道联合带abs皮卡轮毂轴承外圈及其加工方法 (Groove and raceway combined ABS pick up hub bearing outer ring and processing method thereof ) 是由 夏建祥 于 2021-08-24 设计创作，主要内容包括：本发明涉及一种沟道与滚道联合带ABS皮卡轮毂轴承外圈及其加工方法,所属轮毂轴承技术领域,包括轴承外圈,所述的轴承外圈上设有与轴承外圈呈一体化的连接法兰盘,所述的轴承外圈内设有装配内孔,所述的装配内孔一端设有沟道,所述的装配内孔另一端设有滚道,所述的连接法兰盘一端侧边设有固定孔,所述的固定孔侧边设有与固定孔相平行且为与装配内孔不连通的螺纹孔。具有质量稳定性好、磨削量小、加工效率高、操作方便快捷和省时省力的优点。简化了轮毂轴承外圈加工工艺,提高了效率及产品尺寸精度。(The invention relates to a groove and raceway combined wheel hub bearing outer ring with an ABS (anti-lock brake system) pickup and a processing method thereof, belonging to the technical field of wheel hub bearings. The grinding machine has the advantages of good quality stability, small grinding amount, high machining efficiency, convenience and rapidness in operation, time saving and labor saving. The processing technology of the outer ring of the hub bearing is simplified, and the efficiency and the product size precision are improved.)

1. The utility model provides a channel and raceway are united and are taken ABS pick up wheel hub bearing inner race which characterized in that: including bearing inner race (1), bearing inner race (1) on be equipped with and be the flange plate (4) of integration with bearing inner race (1), bearing inner race (1) in be equipped with assembly hole (2), assembly hole (2) one end be equipped with channel (6), the assembly hole (2) other end be equipped with raceway (7), flange plate (4) one end side be equipped with fixed orifices (12), fixed orifices (12) side be equipped with parallel with fixed orifices (12) and for screw hole (11) that do not communicate with assembly hole (2).

2. The outer ring of the groove and raceway combined ABS pickup hub bearing of claim 1, wherein: connecting flange dish (4) terminal surface be square structure, four angles of connecting flange dish (4) on all be equipped with the connecting hole, the four sides of connecting flange dish (4) in the middle of the department all be equipped with strengthen limit (3), the connecting hole of strengthening limit (3) and connecting flange dish (4) between all be equipped with assembly breach (5).

3. The processing method of the outer ring of the bearing with the groove and the raceway combined ABS pick-up hub as claimed in claim 2, characterized by comprising the following steps:

the first step is as follows: casting or forging is adopted to produce a blank body of the bearing outer ring (1);

the second step is that: placing a blank body of a bearing outer ring (1) on a numerical control machine tool, firstly carrying out rough turning on the outer circle of the bearing outer ring (1) and the inner wall of an assembling inner hole (2), wherein the machining allowance of the outer circle of the bearing outer ring (1) and the inner wall of the assembling inner hole (2) is 3-6 mm;

the third step: roughly turning the connecting flange plate (4) by taking the excircle of the bearing outer ring (1) and the inner wall of the assembling inner hole (2) as references, forming a square end face structure along the outermost edge of the blank body, wherein the allowance of the outer end face of the connecting flange plate (4) is 2-4 mm, and finishing the finish machining of the two end faces of the connecting flange plate (4);

the fourth step: finish turning the assembly inner hole (2) by taking the excircle of the bearing outer ring (1) and the connecting flange plate (4) as references, and simultaneously finishing the processing and forming of the channel (6) and the raceway (7);

the fifth step: milling four corners of the connecting flange plate (4) into arc surfaces by taking the excircle of the bearing outer ring (1) and the inner wall of the assembling inner hole (2) as references, and then milling the outline of the assembling gap (5) so as to leave a reinforcing edge (3) which is finally positioned in the middle of four surfaces of a blank body, wherein the size of the reinforcing edge (3) is reserved with allowance of 2-4 mm, after the machining is finished, the blank body is machined into a semi-finished bearing outer ring (1), and machining allowance of 3-6 mm is reserved on the outer circular surfaces of the bearing outer rings (1) positioned at the front end and the rear end of the connecting flange plate (4);

and a sixth step: the semi-finished bearing outer ring (1) is placed on a circular table (10) of a rotating plate (9), a positioning rod, positioned on a side plate of the circular table (10), on the rotating plate (9) extends into a connecting flange (4), then the semi-finished bearing outer ring (1) is pressed through a pressing plate (13), and a screw (14) is arranged on the pressing plate (13) to position the bearing outer ring (1) to the center of the circular table (10);

the seventh step: the rotating plate (9) is positioned on a three-axis numerical control lathe, and a drill bit punches the middle of the side surface of the top of the bearing outer ring (1) from top to bottom and then expands the hole, so that the fixed hole (12) is machined;

eighth step: the displacement rotating plate (9) is used for punching the side surface of the top of the bearing outer ring (1) through a drill bit and then tapping to form a threaded hole (11);

the ninth step: taking down the bearing outer ring (1) and detecting whether the positions and the directions of the fixing hole (12) and the threaded hole (11) are correct or not through a detection table (20);

the tenth step: after the detection is qualified, finishing the finish machining of the excircle of the bearing outer ring (1) at the two ends of the connecting flange plate (4) by taking the assembling inner hole (2) as a reference, and driving a cutting knife (33) on a cutting knife holder (30) to feed and cut the bearing outer ring (1) by adopting a rack shaft seat (31) to realize the displacement of stroke and feed amount; and finally finishing the size processing of the reinforcing edge (3).

4. The processing method of the outer ring of the bearing with the groove and the raceway combined ABS pick-up hub according to claim 3, wherein the processing method comprises the following steps: the rotating plate (9) is connected with a support base (15) which can be arranged on the machine tool in parallel, the rotating plate (9) is connected with the support base (15) through a pin shaft, and an included angle between the rotating plate (9) and the support base (15) is controlled through a support frame (8).

5. The processing method of the outer ring of the bearing with the groove and the raceway combined ABS pick-up hub according to claim 4, wherein the processing method comprises the following steps: the support frame (8) is movably connected with the support frame base (15) by adopting a lower sliding rod (16), and is movably connected with the rotating plate (9) by adopting an upper sliding rod (18); the lower sliding rod (16) and the bracket base (15) as well as the upper sliding rod (18) and the rotating plate (9) are connected and fixed in a pin shaft manner by adopting the lug plate seat (19), the lower sliding rod (16) extends into the upper sliding rod (18) to form a sliding connection structure, and meanwhile, the lower sliding rod (16) and the upper sliding rod (18) are connected and fixed through the locking bolt (17).

6. The processing method of the outer ring of the bearing with the groove and the raceway combined ABS pick-up hub according to claim 3, wherein the processing method comprises the following steps: the detection table (20) is communicated with the connecting flange plate (4) through corresponding holes (27) in four corners, pins (21) are inserted into the corresponding holes (27) to limit and fix the bearing outer ring (1), and then a fixing frame (22) on the side edge of the detection table (20) is respectively used for detecting a fixing hole (12) and a threaded hole (11) through a sliding fixing hole measuring rod (24) and a threaded hole measuring rod (23).

7. The processing method of the outer ring of the bearing with the groove and the raceway combined ABS pick-up hub according to claim 6, wherein the processing method comprises the following steps: a first jacking spring (25) is arranged between the fixing frame (22) and the fixing hole measuring rod (24), a second jacking spring (26) is arranged between the fixing frame (22) and the screw hole measuring rod (23), a stop ring (28) for preventing the fixing hole measuring rod (24) and the screw hole measuring rod (23) from being completely separated is arranged at the rear end of the fixing frame (22), the first jacking spring (25) is matched with the stop ring (28), the second jacking spring (26) is matched with the stop ring (28) to enable the fixing hole measuring rod (24) and the screw hole measuring rod (23) to be conveniently reset in the detection process, and meanwhile handles (29) are arranged at the tail ends of the fixing hole measuring rod (24) and the screw hole measuring rod (23).

8. The processing method of the outer ring of the bearing with the groove and the raceway combined ABS pick-up hub according to claim 1, wherein the processing method comprises the following steps: when the cutting knife (33) is machined, the grinding abrasive belt (34) is driven by the rotary disc (32) which is in bearing connection with the frame shaft seat (31), and the rotary disc (32) and the cutting knife seat (30) synchronously move, so that the effective polishing process of the grinding abrasive belt (34) to the bearing outer ring (1) is ensured.

Technical Field

The invention relates to the technical field of hub bearings, in particular to a channel and raceway combined hub bearing outer ring with an ABS pick-up and a processing method thereof.

Background

The hub bearing unit is developed on the basis of a standard angular contact ball bearing and a tapered roller bearing, has the advantages of good assembling performance, compact structure, large load capacity and the like, is widely used in cars, and has a tendency of gradually expanding application in trucks; the angular contact ball bearing is point contact, bears less load, but has higher rotating speed; the tapered roller bearing is in line contact, has strong bearing capacity and high rigidity, but has relatively low rotating speed.

The pick-up hub bearing has strong power and has stronger capability of carrying cargo and adapting to poor road surfaces than a car, so the hub bearing mainly uses the tapered roller bearing, but the common pick-up has no comfort similar to the car, and the transportation efficiency of the pick-up in the market is increased day by day.

In addition, the ABS fixing hole position is designed to be parallel to the position of the assembled bearing outer ring, the bolt hole parallel to the fixing hole is designed, and the machined bearing outer ring needs to be detected, so that whether the positions and the directions of the bolt hole and the fixing hole are correct or not is determined, the factory quality is guaranteed, and the problem that the assembly cannot be carried out is solved.

Disclosure of Invention

The invention mainly solves the defects of poor quality stability, low processing efficiency, low dimensional precision, large grinding wheel consumption and high labor intensity in the prior art, and provides the ABS pick-up hub bearing outer ring with the combination of the groove and the raceway and the processing method thereof. The processing technology of the outer ring of the hub bearing is simplified, and the efficiency and the product size precision are improved.

The technical problem of the invention is mainly solved by the following technical scheme:

the utility model provides a channel and raceway unite and take ABS pick up wheel hub bearing inner race, includes the bearing inner race, the bearing inner race on be equipped with the flange dish of being the integration with the bearing inner race, the bearing inner race in be equipped with the assembly hole, assembly hole one end be equipped with the channel, the assembly hole other end be equipped with the raceway, flange dish one end side be equipped with the fixed orifices, the fixed orifices side be equipped with the fixed orifices parallel and for the screw hole that does not communicate with the assembly hole.

The raceway position mainly bears the loading force, designs its structure in the department of cooperating with the knuckle, and the channel position designs in the opposite side, combines angular contact ball bearing and tapered roller bearing, and the steel ball combines together the effect with tapered roller, can bear higher dynamic and static load, can reach higher rotational speed again.

Preferably, the end face of the connecting flange plate is of a square structure, connecting holes are formed in four corners of the connecting flange plate, reinforcing edges are arranged in the middles of the four edges of the connecting flange plate, and assembling gaps are formed between the reinforcing edges and the connecting holes of the connecting flange plate.

The connecting flange plate is convenient for fixedly installing the bearing outer ring at a designated position. The reinforcing edges can reinforce the deformation resistance and the firmness of the bearing outer ring, and in a non-stressed area, namely the position between the connecting hole and the reinforcing edges, a notch is formed by cutting, the weight of the bearing outer ring is reduced, and the lightweight design of the bearing outer ring is realized.

Preferably, the processing method of the bearing outer ring with the groove and the raceway combined and ABS pick-up hub comprises the following operation steps:

the first step is as follows: casting or forging is adopted to produce a blank body of the bearing outer ring.

The second step is that: the blank body of the bearing outer ring is placed on a numerical control machine tool, the outer circle of the bearing outer ring and the inner wall of the assembling inner hole are subjected to rough turning, and the machining allowance of the outer circle of the bearing outer ring and the inner wall of the assembling inner hole is 3-6 mm.

The third step: roughly turning the connecting flange disc by taking the excircle of the bearing outer ring and the inner wall of the assembling inner hole as references, forming a square end face structure along the outermost edge of the blank body, wherein the allowance of the outer end face of the connecting flange disc is 2-4 mm, and finishing the finish machining of the two end faces of the connecting flange disc.

The fourth step: finish turning the assembly inner hole by taking the excircle of the bearing outer ring and the connecting flange as references, and finishing the processing and forming of the channel and the raceway at the same time;

the fifth step: milling four corners of the connecting flange plate into arc surfaces by taking the excircle of the bearing outer ring and the inner wall of the assembling inner hole as references, and then milling the outline of the assembling gap, thereby leaving the reinforcing edges located in the middle of four surfaces of the blank body at last, leaving the allowance of the size of the reinforcing edges to be 2-4 mm, finishing the processing, processing the blank body into a semi-finished bearing outer ring, and reserving the processing allowance to be 3-6 mm on the excircle surfaces of the bearing outer rings at the front end and the rear end of the connecting flange plate.

And a sixth step: the semi-finished bearing outer ring is placed on a circular table of the rotating plate, a positioning rod on the rotating plate, which is positioned on a side plate of the circular table, extends into the connecting flange plate, then the semi-finished bearing outer ring is pressed through the pressing plate, and a screw is arranged on the pressing plate to position the bearing outer ring to the center of the circular table.

The seventh step: the rotating plate is positioned on a three-axis numerical control lathe, and the drill bit punches the middle of the side surface of the top of the outer ring of the bearing from top to bottom and then performs reaming, so that the fixed hole is machined.

Eighth step: and the displacement rotating plate is used for punching the side surface of the top of the bearing outer ring through a drill bit and then tapping to form a threaded hole.

The ninth step: and taking down the outer ring of the bearing, and detecting whether the positions and the directions of the fixing hole and the threaded hole are correct or not through the detection platform.

The tenth step: and after the detection is qualified, finishing the finish machining of the excircle of the outer ring of the bearing at the two ends of the connecting flange plate by taking the assembling inner hole as a reference, and performing feed cutting on the outer ring of the bearing by adopting a cutting knife on a frame shaft seat driving cutting knife holder to realize the displacement of the stroke and the feed amount. And finally finishing the size processing of the reinforced edge.

Preferably, the rotating plate is connected with a support base which can be arranged on the machine tool in parallel, the rotating plate is connected with the support base through a pin shaft, and an included angle between the rotating plate and the support base is controlled through the support frame.

Preferably, the support frame adopts a lower slide bar movably connected with the support frame base and adopts an upper slide bar movably connected with the rotating plate; the lower sliding rod and the bracket base, the upper sliding rod and the rotating plate are connected and fixed in a pin shaft mode through the lug plate seats, the lower sliding rod extends into the upper sliding rod to form a sliding connection structure, and meanwhile the lower sliding rod and the upper sliding rod are connected and fixed through the locking bolts.

And loosening the locking bolt, moving the upper slide bar to a designated position, and then tightening the locking bolt, so that the change of the included angle between the rotating plate and the bracket base can be realized, wherein the size of the included angle is the size of the included angle between the fixed hole and the bottom surface of the bearing outer ring.

Preferably, the detection table is communicated with the connecting flange disc through corresponding holes in four corners, pins are inserted into the corresponding holes to limit and fix the bearing outer ring, and then the fixing holes and the threaded holes are respectively detected on a fixing frame on the side edge of the detection table through a sliding fixing hole measuring rod and a sliding threaded hole measuring rod.

Preferably, a first jacking spring is arranged between the fixing frame and the fixed hole measuring rod, a second jacking spring is arranged between the fixing frame and the screw hole measuring rod, a stop ring for preventing the fixed hole measuring rod and the screw hole measuring rod from being completely separated is arranged at the rear end of the fixing frame, the first jacking spring is matched with the stop ring, the second jacking spring is matched with the stop ring to enable the fixed hole measuring rod and the screw hole measuring rod to be conveniently reset in the detection process, and meanwhile handles are arranged at the tail ends of the fixed hole measuring rod and the screw hole measuring rod.

Preferably, when the cutting knife is machined, the rotary table in bearing connection with the machine frame shaft seat drives the sanding belt, the rotary table and the cutting knife seat synchronously move, and the effective polishing process of the sanding belt on the outer ring of the bearing is ensured.

The invention can achieve the following effects:

compared with the prior art, firstly, the design ensures that a pickup truck assembled with the hub bearing outer ring can bear higher dynamic and static loads and reach higher rotating speed through the matching of the roller path on the inner hole wall of the outer ring and the hook path, secondly, the design also realizes the light weight through cutting a non-stressed area, and in order to improve the firmness, a reinforcing edge is arranged in the middle of four sides, and finally, in the processing method of the design, the detection of a fixed hole and a bolt hole is realized through a detection table, so that the delivery quality is ensured. The grinding machine has the advantages of good quality stability, small grinding amount, high machining efficiency, convenience and rapidness in operation, time saving and labor saving. The processing technology of the outer ring of the hub bearing is simplified, and the efficiency and the product size precision are improved.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a side cross-sectional view of the bearing cup of the present invention;

FIG. 3 is a schematic axial view of the bearing cup of the present invention being machined on a rotating plate;

FIG. 4 is a partial schematic view of the stand of the present invention;

FIG. 5 is a schematic top view of the inspection station of the present invention in a working state;

FIG. 6 is a schematic cross-sectional view taken along the line A-A in FIG. 5;

FIG. 7 is a schematic cross-sectional view taken along line B-B of FIG. 5;

FIG. 8 is a schematic cross-sectional view taken along the line C-C in FIG. 5;

FIG. 9 is an enlarged schematic view at D of FIG. 6;

FIG. 10 is a schematic diagram of the outer circle processing structure of the bearing outer ring of the present invention.

In the figure: the bearing outer ring comprises a bearing outer ring 1, an assembling inner hole 2, a reinforcing edge 3, a connecting flange plate 4, an assembling gap 5, a channel 6, a raceway 7, a support frame 8, a rotating plate 9, a circular truncated cone 10, a threaded hole 11, a fixed hole 12, a pressing plate 13, a screw 14, a support base 15, a lower sliding rod 16, a locking bolt 17, an upper sliding rod 18, an ear plate seat 19, a detection table 20, a pin 21, a fixed frame 22, a threaded hole measuring rod 23, a fixed hole measuring rod 24, a first jacking spring 25, a second jacking spring 26, a corresponding hole 27, a stop ring 28, a handle 29, a cutting tool seat 30, a frame shaft seat 31, a rotary table 32, a cutting tool 33 and a polishing belt 34.

Detailed Description

The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.

Example (b): as shown in fig. 1-10, a raceway and raceway combined belt ABS pickup hub bearing outer race comprises a bearing outer race 1, a connecting flange 4 integrated with the bearing outer race 1 is arranged on the bearing outer race 1, the end face of the connecting flange 4 is of a square structure, connecting holes are arranged at four corners of the connecting flange 4, reinforcing edges 3 are arranged at the middle of four sides of the connecting flange 4, and assembling notches 5 are arranged between the reinforcing edges 3 and the connecting holes of the connecting flange 4. Be equipped with assembly hole 2 in the bearing inner race 1, assembly hole 2 one end is equipped with channel 6, and the assembly hole 2 other end is equipped with raceway 7, and connecting flange 4 one end side is equipped with fixed orifices 12, and fixed orifices 12 side is equipped with and parallels with fixed orifices 12 and for the screw hole 11 that does not communicate with assembly hole 2.

A groove and raceway combined ABS pick up hub bearing outer ring and a processing method thereof comprise the following operation steps:

the first step is as follows: the blank body of the bearing outer ring 1 is produced by casting or forging.

The second step is that: the blank body of the bearing outer ring 1 is placed on a numerical control machine tool, the outer circle of the bearing outer ring 1 and the inner wall of the assembling inner hole 2 are subjected to rough turning, and the machining allowance of the outer circle of the bearing outer ring 1 and the inner wall of the assembling inner hole 2 is 4 mm.

The third step: roughly turning the connecting flange plate 4 by taking the excircle of the bearing outer ring 1 and the inner wall of the assembling inner hole 2 as references, forming a square end face structure along the outermost edge of the blank body, wherein the allowance of the outer end face of the connecting flange plate 4 is 3mm, and finishing the finish machining of the two end faces of the connecting flange plate 4.

The fourth step: and (3) finely turning the assembly inner hole 2 by taking the excircle of the bearing outer ring 1 and the connecting flange 4 as references, and finishing the processing and forming of the channel 6 and the raceway 7.

The fifth step: milling four corners of the connecting flange plate 4 into arc surfaces by taking the excircle of the bearing outer ring 1 and the inner wall of the assembling inner hole (2) as a reference, and milling the outline of the assembling gap 5, thereby leaving the reinforcing edge 3 located in the middle of four surfaces of the blank body at last, leaving the size of the reinforcing edge 3 with a margin of 3mm, finishing the machining, machining the blank body into the semi-finished bearing outer ring 1, and reserving the machining margin of the outer circular surface of the bearing outer ring 1 at the front end and the rear end of the connecting flange plate 4 to be 4 mm.

And a sixth step: the semi-finished bearing outer ring 1 is placed on a circular table 10 of a rotating plate 9, a positioning rod on the rotating plate 9, which is positioned on a side plate of the circular table 10, extends into a connecting flange plate 4, then the semi-finished bearing outer ring 1 is pressed through a pressing plate 13, and a screw 14 is arranged on the pressing plate 13 to position the bearing outer ring 1 to the center of the circular table 10;

the seventh step: the rotating plate 9 is positioned on a three-axis numerical control lathe, and a drill bit punches the middle of the side surface of the top of the bearing outer ring 1 from top to bottom and then expands the hole, so that the fixed hole 12 is machined.

The rotating plate 9 is connected with a support base 15 which can be arranged on a machine tool in parallel, the rotating plate 9 is connected with the support base 15 through a pin shaft, and an included angle between the rotating plate 9 and the support base 15 is controlled through the support frame 8. The supporting frame 8 is movably connected with the supporting frame base 15 by adopting a lower sliding rod 16 and is movably connected with the rotating plate 9 by adopting an upper sliding rod 18; the lower sliding rod 16 and the bracket base 15, the upper sliding rod 18 and the rotating plate 9 are connected and fixed in a pin shaft type by adopting the lug plate seat 19, the lower sliding rod 16 extends into the upper sliding rod 18 to form a sliding connection structure, and meanwhile, the lower sliding rod 16 and the upper sliding rod 18 are connected and fixed through the locking bolt 17.

Eighth step: and displacing the rotating plate 9, punching the side surface of the top of the bearing outer ring 1 by a drill bit, and then tapping to form a threaded hole 11.

The ninth step: the bearing outer ring 1 is taken down and whether the positions and the directions of the fixing holes 12 and the threaded holes 11 are correct or not is detected through the detection table 20. The detection table 20 is communicated with the connecting flange plate 4 through corresponding holes 27 on four corners, a pin 21 is inserted into the corresponding hole 27 to limit and fix the bearing outer ring 1, and then a fixed hole 12 and a threaded hole 11 are respectively detected on a fixed frame 22 on the side edge of the detection table 20 through a sliding fixed hole measuring rod 24 and a sliding threaded hole measuring rod 23.

A first top pressure spring 25 is arranged between the fixing frame 22 and the fixed hole measuring rod 24, a second top pressure spring 26 is arranged between the fixing frame 22 and the screw hole measuring rod 23, a stop ring 28 for preventing the fixed hole measuring rod 24 and the screw hole measuring rod 23 from being completely separated is arranged at the rear end of the fixing frame 22, the first top pressure spring 25 is matched with the stop ring 28, the second top pressure spring 26 is matched with the stop ring 28, so that the fixed hole measuring rod 24 and the screw hole measuring rod 23 can be conveniently reset in the detection process, and meanwhile, the tail ends of the fixed hole measuring rod 24 and the screw hole measuring rod 23 are respectively provided with a handle 29.

The tenth step: and after the detection is qualified, finishing the finish machining of the excircle of the bearing outer ring (1) at the two ends of the connecting flange plate 4 by taking the assembling inner hole 2 as a reference, and driving the cutting knife 33 on the cutting knife holder 30 to feed and cut the bearing outer ring 1 by adopting the rack shaft seat 31 so as to realize the displacement of the stroke and the feed amount. And finally finishing the dimension processing of the reinforcing edge 3.

When the cutting knife 33 is machined, the grinding abrasive belt 34 is driven by the rotary table 32 in bearing connection with the frame shaft seat 31, and the rotary table 32 and the cutting knife seat 30 synchronously move, so that the effective polishing process of the grinding abrasive belt 34 on the bearing outer ring (1) is ensured.

In conclusion, the groove and raceway combined bearing outer ring with the ABS pick-up hub and the processing method thereof have the advantages of good quality stability, small grinding amount, high processing efficiency, convenience and rapidness in operation, time saving and labor saving. The processing technology of the outer ring of the hub bearing is simplified, and the efficiency and the product size precision are improved.

The above description is only an embodiment of the present invention, but the structural features of the present invention are not limited thereto, and any changes or modifications within the scope of the present invention by those skilled in the art are covered by the present invention.