Maintenance-free hub structure for axle

Abstract

The utility model discloses a maintenance-free hub structure for an axle, which relates to the technical field of axle structures and comprises a maintenance-free hub and further comprises a locking component arranged on the inner side of the maintenance-free hub. The locking assembly comprises a locking disc arranged on the inner side of the maintenance-free hub, a locking nut arranged on the side portion of the locking disc and a clamping spring arranged between the locking nut and the maintenance-free hub. The bearing assembly is arranged between the axle and the maintenance-free hub; the bearing assembly comprises an inner ring arranged on the outer side of the axle, an outer ring arranged on the outer side of the inner ring, a retainer arranged between the outer ring and the inner ring, a rolling unit arranged on the outer ring of the retainer, and a lubricating unit arranged on the outer side of the rolling unit. According to the maintenance-free hub structure for the axle, through the arrangement of the locking assembly and the bearing assembly, it is guaranteed that the bearing is lubricated, then the friction force of the bearing is reduced, the application range is wide, the service life is long, and the annual use cost is remarkably reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of axle structures, in particular to a maintenance-free hub structure for an axle. Background Art

[0002] The automobile axle comprises an axle and a wheel hub mounted on the axle, and the end surface of the wheel hub is mounted with a plurality of bolts distributed along its circumference. The existing wheel hub is usually fixed to the rim through a spoke plate, and the spoke plate is fixed on the bolts.

[0003] The existing axle hub structure is that the hub is pressed with 2 sets of bearings and 1 set of oil seals, see attached Figure 1 , ① outer bearing ② wheel hub ③ inner bearing ④ oil seal. In this structure, the wheel hub cavity between the outer bearing and the inner bearing needs to be lubricated with grease, the outer end of the wheel hub is sealed with a hub cover, and the inner end of the wheel hub is sealed with an oil seal. This structure will cause grease loss after long-term use, and after the ④ oil seal is worn out by long-term rotation, grease will seep out from the matching position between the ④ oil seal and the axle, causing the oil seal to fail and cause oil leakage. Therefore, the existing wheel hub structure requires regular maintenance of about 5,000 kilometers. For example, some wearing parts such as oil seals need to be replaced regularly, and the cost of use is relatively high. For this reason, we propose a maintenance-free wheel hub structure for axles. Utility Model Content

[0004] The main purpose of the utility model is to provide a maintenance-free wheel hub structure for a vehicle axle. By setting a locking assembly and a bearing assembly, the problem of the existing wheel hub structure requiring regular maintenance of about 5,000 kilometers, such as some wearing parts such as oil seals, needing regular replacement, and the cost of use is high, is solved. For this reason, we propose a maintenance-free wheel hub structure for a vehicle axle.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A maintenance-free hub structure for a vehicle bridge, comprising a maintenance-free hub, and further comprising:

[0007] A locking assembly, wherein the locking assembly is arranged inside the maintenance-free wheel hub;

[0008] The locking assembly includes a locking disc arranged on the inner side of the maintenance-free wheel hub, a locking nut arranged on the side of the locking disc, and a retaining spring arranged between the locking nut and the maintenance-free wheel hub;

[0009] A bearing assembly, the bearing assembly being disposed between the axle and the maintenance-free wheel hub;

[0010] The bearing assembly includes an inner ring arranged outside the axle, an outer ring arranged outside the inner ring, a retaining frame arranged between the outer ring and the inner ring, a rolling unit arranged on the outer ring of the retaining frame, and a lubricating unit arranged outside the rolling unit.

[0011] Preferably, the outer ring of the locking disk is provided with a protruding ring, and the inner surface of the maintenance-free hub is provided with an annular groove matched with the outer ring of the protruding ring.

[0012] Preferably, the inner surface of the maintenance-free hub is provided with a retaining spring groove adapted to the retaining spring.

[0013] Preferably, there are two retaining frames, and the two retaining frames are arranged relatively between the inner ring and the outer ring.

[0014] Preferably, the rolling unit comprises a mounting groove arranged on the outer circumference of the retaining frame, a rotating shaft movably arranged on the side wall of the mounting groove, and a roller installed on the outer side of the rotating shaft, and the inner surface of the outer ring is provided with a rolling groove adapted to the outer ring of the roller.

[0015] Preferably, the lubrication unit includes an oil storage tank arranged inside the outer ring, an oil collecting chamber arranged on the side of the oil storage tank, and a connecting pipe arranged between the oil collecting chamber and the oil storage tank. The inner surface of the oil collecting chamber is provided with a through groove, and an oil-permeable plate is installed inside the through groove.

[0016] Preferably, a reinforcement member is provided inside the oil storage tank, and the reinforcement member includes a first reinforcement ring and a second reinforcement ring which are arranged opposite to the inner wall of the oil storage tank, and reinforcement ribs are arranged between the first reinforcement ring and the second reinforcement ring.

[0017] Preferably, an oil inlet hole is formed on the outer surface of the outer ring, and a sealing plug is provided inside the oil inlet hole.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] In the utility model, by setting a locking assembly and a bearing assembly, changing the wheel hub structure, using a maintenance-free integrated bearing, and designing a new shaft head locking method, it can achieve maintenance-free for 3 years or 300,000 kilometers. The maintenance-free integrated bearing is integrated with oil seals on the outside and inside, and has grease inside, so no additional oil seal is required on the axle, and a dustproof oil seal can be installed on the inside of the bearing according to the shape of the axle. A retaining spring groove is provided inside the maintenance-free wheel hub. After the maintenance-free integrated bearing is installed in place, the retaining spring is installed to ensure that the outer ring of the bearing moves left and right. The locking nut is tightened once according to the specified torque to ensure that the inner ring of the bearing moves left and right. This structure is simple to install, suitable for drum axles, disc axles, steering axles, etc., has a wide range of uses, a long service life, and significantly reduces the annual use cost;

[0020] Cooperate with the lubrication unit to lubricate the bearings, so that the bearings can be lubricated even under long-term use, thereby reducing the friction of the bearings and making the bearings maintenance-free for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the plane structure of the existing axle hub;

[0022] Figure 2 This is a schematic diagram of the planar structure of the utility model;

[0023] Figure 3 For this utility model Figure 2 The enlarged structural diagram at A in the middle;

[0024] Figure 4 For this utility model Figure 2 Enlarged structural diagram at B in the middle.

[0025] In the figure:

[0026] Maintenance-free wheels;

[0027] Locking assembly; 21, locking plate; 22, locking nut; 23, retaining ring; 24, protruding ring; 25, retaining ring groove;

[0028] Bearing assembly; 31, inner ring; 32, outer ring; 33, cage; 34, rolling unit; 341, rotating shaft; 342, roller; 35, lubrication unit; 351, oil storage tank; 352, oil collecting chamber; 353, connecting pipe; 354, oil permeable plate; 355, reinforcement; 3551, first reinforcement ring; 3552, second reinforcement ring; 3553, reinforcement rib. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0030] Example: Figure 1-4 As shown, a maintenance-free hub structure for a vehicle bridge includes a maintenance-free hub 1, and further includes:

[0031] A locking assembly 2, wherein the locking assembly 2 is arranged inside the maintenance-free wheel hub 1;

[0032] The locking assembly 2 includes a locking disc 21 disposed inside the maintenance-free wheel hub 1, a locking nut 22 disposed on the side of the locking disc 21, and a retaining spring 23 disposed between the locking nut 22 and the maintenance-free wheel hub 1;

[0033] A bearing assembly 3, wherein the bearing assembly 3 is arranged between the axle and the maintenance-free wheel hub 1;

[0034] The bearing assembly 3 includes an inner ring 31 arranged on the outside of the axle, an outer ring 32 arranged on the outside of the inner ring 31, a retaining frame 33 arranged between the outer ring 32 and the inner ring 31, a rolling unit 34 arranged on the outer ring of the retaining frame 33, and a lubricating unit 35 arranged on the outside of the rolling unit 34. The above parts constitute a maintenance-free integrated bearing. Preferably, the maintenance-free integrated bearing is integrated with oil seals on the outside and inside, and has grease inside.

[0035] Among them, the outer ring of the locking disk 21 is installed with a protruding ring 24, and the inner surface of the maintenance-free hub 1 is provided with an annular groove adapted to the outer ring of the protruding ring 24. The locking nut 22 is tightened once according to the specified torque to ensure that the inner ring of the bearing 31 moves left and right.

[0036] The inner surface of the maintenance-free hub 1 is provided with a retaining ring groove 25 matched with the retaining ring 23 .

[0037] There are two retaining frames 33 , and the two retaining frames 33 are disposed oppositely between the inner ring 31 and the outer ring 32 .

[0038] Among them, the rolling unit 34 includes a mounting groove arranged on the outer peripheral surface of the retaining frame 33, a rotating shaft 341 movably arranged on the side wall of the mounting groove, and a roller 342 installed on the outside of the rotating shaft 341. The inner surface of the outer ring 32 is provided with a rolling groove adapted to the outer ring of the roller 342. Preferably, there are multiple groups of rolling units 34, and the multiple groups of rolling units 34 are distributed in a circular array on the outer ring of the retaining frame 33.

[0039] Among them, the lubrication unit 35 includes an oil storage tank 351 arranged inside the outer ring 32, an oil collecting chamber 352 arranged on the side of the oil storage tank 351, and a connecting pipe 353 arranged between the oil collecting chamber 352 and the oil storage tank 351. A through groove is opened on the inner surface of the oil collecting chamber 352, and an oil-permeable plate 354 is installed inside the through groove.

[0040] Among them, a reinforcement member 355 is arranged inside the oil storage tank 351, and the reinforcement member 355 includes a first reinforcement ring 3551 and a second reinforcement ring 3552 which are arranged relatively to the inner wall of the oil storage tank 351, and a reinforcement rib 3553 is arranged between the first reinforcement ring 3551 and the second reinforcement ring 3552. The first reinforcement ring 3551, the second reinforcement ring 3552, and the reinforcement rib 3553 are cooperated to improve the self strength of the oil storage tank 351.

[0041] The outer surface of the outer ring 32 is provided with an oil inlet hole, and a sealing plug is arranged inside the oil inlet hole.

[0042] When in use, lubricating grease is injected into the oil storage tank 351 through the oil inlet hole, and lubricating oil is also applied to the inside of the bearing body 1. The bearing is installed in the wheel hub of the vehicle axle, and the bearing is locked by the locking plate 21, the protruding ring 24 and the annular groove, the locking nut 22, the retaining ring 23 and the retaining ring groove 25, so that the outer ring 32 of the bearing can rotate left and right. During the continuous rotation of the bearing, the bearing generates heat, so that the lubricating grease in the oil storage tank 351 gradually melts, and the lubricating grease enters the oil collecting chamber 352 through the connecting pipe 353, and then cooperates with the oil permeable plate 354 to allow the lubricating grease to enter the surface of the roller 342 to lubricate the bearing, so that the bearing can be lubricated even under long-term use, thereby reducing the friction of the bearing and making the bearing maintenance-free for a long time.

[0043] A reinforcement member 355 is provided inside the oil storage tank 351 to strengthen the strength of the oil storage tank 351, thereby increasing the overall strength of the bearing body and enabling the bearing body to maintain good working conditions in a harsh working environment such as the wheel hub.

Claims

1. A maintenance-free hub structure for a vehicle axle, comprising a maintenance-free hub (1), characterized in that: Also includes: A locking assembly (2), wherein the locking assembly (2) is arranged on the inner side of the maintenance-free wheel hub (1); The locking assembly (2) comprises a locking disk (21) arranged inside the maintenance-free wheel hub (1), a locking nut (22) arranged on the side of the locking disk (21), and a retaining spring (23) arranged between the locking nut (22) and the maintenance-free wheel hub (1); A bearing assembly (3), wherein the bearing assembly (3) is arranged between the axle and the maintenance-free wheel hub (1); The bearing assembly (3) comprises an inner ring (31) arranged on the outside of the axle, an outer ring (32) arranged on the outside of the inner ring (31), a retaining frame (33) arranged between the outer ring (32) and the inner ring (31), a rolling unit (34) arranged on the outer ring of the retaining frame (33), and a lubrication unit (35) arranged on the outside of the rolling unit (34).

2. The maintenance-free hub structure for a vehicle axle according to claim 1, characterized in that: The outer ring of the locking disk (21) is provided with a protruding ring (24), and the inner surface of the maintenance-free hub (1) is provided with an annular groove matched with the outer ring of the protruding ring (24).

3. The maintenance-free hub structure for a vehicle axle according to claim 2, characterized in that: The inner surface of the maintenance-free hub (1) is provided with a retaining ring groove (25) adapted to the retaining ring (23).

4. The maintenance-free hub structure for a vehicle axle according to claim 3, characterized in that: There are two retaining frames (33), and the two retaining frames (33) are arranged relatively between the inner ring (31) and the outer ring (32).

5. The maintenance-free hub structure for a vehicle axle according to claim 4, characterized in that: The rolling unit (34) comprises a mounting groove arranged on the outer peripheral surface of the retaining frame (33), a rotating shaft (341) movably arranged on the side wall of the mounting groove, and a roller (342) installed outside the rotating shaft (341); the inner surface of the outer ring (32) is provided with a rolling groove matched with the outer ring of the roller (342).

6. The maintenance-free hub structure for a vehicle axle according to claim 5, characterized in that: The lubrication unit (35) comprises an oil storage tank (351) arranged inside the outer ring (32), an oil collecting chamber (352) arranged on the side of the oil storage tank (351), and a connecting pipe (353) arranged between the oil collecting chamber (352) and the oil storage tank (351); a through groove is provided on the inner surface of the oil collecting chamber (352), and an oil permeable plate (354) is installed inside the through groove.

7. The maintenance-free hub structure for a vehicle axle according to claim 6, characterized in that: A reinforcing member (355) is arranged inside the oil storage tank (351), and the reinforcing member (355) comprises a first reinforcing ring (3551) and a second reinforcing ring (3552) arranged relative to the inner wall of the oil storage tank (351), and a reinforcing rib (3553) is arranged between the first reinforcing ring (3551) and the second reinforcing ring (3552).

8. The maintenance-free hub structure for a vehicle axle according to claim 7, characterized in that: An oil inlet hole is provided on the outer surface of the outer ring (32), and a sealing plug is provided inside the oil inlet hole.

Images