Hub fixing structure free of bearing clearance adjustment

Abstract

The utility model relates to the technical field of bearings, and discloses a hub fixing structure free of bearing clearance adjustment, which comprises a bearing main body, the bearing main body comprises a bearing outer ring and a bearing inner ring, the bearing outer ring sleeves the outer side of the bearing inner ring, a hub sleeves the outer side of the bearing outer ring, and a rolling mechanism is arranged between the bearing outer ring and the bearing inner ring; a spring groove is formed in the bearing outer ring, and a tensioning mechanism is arranged in the spring groove. Compared with the prior art, the bearing has the following advantages and effects that the tensioning mechanism is arranged, so that the purpose of keeping the balls tightly attached to the rollers can be achieved, the purpose of ensuring automatic adjustment of the clearance between the bearing outer ring and the bearing inner ring can be achieved, and then the purposes of reducing the use cost and facilitating use can be achieved; the friction between the roller and the rolling groove can be reduced, the purpose of reducing the abrasion degree of the roller can be achieved, and then the purpose of prolonging the service life of the roller can be achieved.

Description

Technical Field

[0001] The present application relates to the technical field of bearings, and in particular to a hub fixing structure that does not require adjustment of bearing clearance. Background Art

[0002] The working clearance of the hub unit is crucial to the performance and life of the wheel hub. At present, during the operation of the automobile wheel hub, the actual working clearance of the hub unit will change due to complex conditions such as overload, load impact, wear and temperature rise of the hub unit bearing working surface, resulting in a decrease in the stability and service life of the hub unit, and even failures such as hub locking and fire, causing serious economic losses and personal safety.

[0003] After searching, the patent document with authorization announcement number CN203172350U discloses a wheel hub fixing structure that does not require adjustment of bearing clearance. It includes two tapered roller bearings arranged back to back and installed in the wheel hub. The outer rings of the two bearings are positioned by the shoulders on both sides of the wheel hub, and the inner rings of the two bearings are positioned by the shoulders of the shaft head and the bearing locking nuts. A spacer is mounted on the shaft head, and the spacer is located between the two bearing inner rings. The two bearing inner rings rest on both ends of the spacer. The bearing clearance is ensured by the length of the spacer and the distance between the two shoulders of the wheel hub. When assembling the wheel hub, only the bearing locking nuts need to be tightened, and there is no need to adjust the bearing clearance. This eliminates the need to manually adjust the tightening torque of the locking nut and the action of loosening the nut after tightening. It is easy to operate and helps to extend the service life of the bearing.

[0004] In actual use, it was found that the rollers between the inner ring and the outer ring of the bearing in the wheel hub would wear out after working for a long time, resulting in an increase in the clearance between the inner ring and the outer ring of the bearing. The existing device adjusts the clearance between the inner ring and the outer ring of the bearing through a spacer sleeve, which leads to a large consumption of the spacer sleeve material, increases the cost of use, and is not conducive to use. Therefore, we proposed a wheel hub fixing structure that does not require adjustment of the bearing clearance to solve the above problem. Utility Model Content

[0005] The purpose of this application is to provide a hub fixing structure that does not require adjustment of bearing clearance, which has the effect of automatically adjusting the clearance between the inner ring and the outer ring of the bearing, reducing the cost of use and facilitating use.

[0006] The above technical objectives of the present application are achieved through the following technical solutions: a hub fixing structure without adjusting bearing clearance, including a bearing body, the bearing body including a bearing outer ring and a bearing inner ring, the bearing outer ring is sleeved on the outside of the bearing inner ring, a wheel hub is sleeved on the outside of the bearing outer ring, and a rolling mechanism is arranged between the bearing outer ring and the bearing inner ring; a spring groove is opened in the bearing outer ring, a tensioning mechanism is arranged in the spring groove, a piston mechanism is arranged on the inner wall of one side of the spring groove, a mounting plate is fixedly installed on the left side of the bearing outer ring, and a fixing mechanism is arranged between the mounting plate and the wheel hub.

[0007] The present application is further configured as follows: the rolling mechanism includes a rolling groove and a roller, a rolling groove is provided on one side adjacent to the outer ring of the bearing and the inner ring of the bearing, a roller is provided in the rolling groove, the roller is rollingly connected to the rolling groove, and the rolling groove is connected to the corresponding spring groove.

[0008] By adopting the above technical solution and providing a rolling mechanism, the roller can roll in the rolling groove, thereby achieving the purpose of the bearing outer ring driving the wheel hub to rotate on the bearing inner ring.

[0009] The present application is further configured as follows: the tensioning mechanism includes a spring and a support plate, a spring is fixedly mounted on the inner wall of the spring groove away from the roller, a support plate is fixedly mounted on the other end of the spring, and a connecting mechanism is provided on the support plate.

[0010] By adopting the above technical solution and providing a tensioning mechanism, the spring can drive the support plate to push toward the side close to the roller, thereby achieving the purpose of driving the support seat to move toward the side close to the roller.

[0011] The present application is further configured as follows: the connection mechanism includes a support seat and a ball, the support plate is fixedly mounted with a support seat on the side close to the roller, the support seat is rollingly mounted with a ball on the side close to the ball, and the ball is adapted to the corresponding roller.

[0012] By adopting the above technical solution and providing a connection mechanism, the support seat can push the balls to keep the rollers in close fit, thereby achieving the purpose of ensuring automatic adjustment of the clearance between the outer ring of the bearing and the inner ring of the bearing.

[0013] The present application is further configured as follows: the piston mechanism includes a piston cylinder, a piston rod and a piston plate, the piston cylinder is fixedly installed on the inner wall of one side of the spring groove, the piston rod is slidably installed on the side of the piston cylinder close to the support plate, the end of the piston rod close to the roller extends into the piston cylinder, the end of the piston rod close to the roller is fixedly installed with a piston plate, the piston plate is slidably connected to the inner wall of the piston cylinder, and an oil injection mechanism is provided on the side of the piston cylinder close to the roller.

[0014] By adopting the above technical solution and providing a piston mechanism, the piston rod can drive the piston plate to move toward the side close to the roller, thereby achieving the purpose of injecting the lubricating oil in the piston cylinder into the oil filling pipe through the piston plate.

[0015] The present application is further configured as follows: the oil filling mechanism includes an oil filling pipe and a one-way valve; the piston cylinder is provided with an oil filling pipe on the side close to the roller, and the one-way valve is provided in the oil filling pipe.

[0016] By adopting the above technical solution and providing an oil injection mechanism, lubricating oil can be injected into the rolling groove through the oil injection pipe, thereby reducing the friction between the roller and the rolling groove and achieving the purpose of reducing the degree of roller wear.

[0017] The present application is further configured as follows: lubricating oil is contained in the piston cylinder, and the lubricating oil is adapted to the oil filling pipe.

[0018] By adopting the above technical solution and providing lubricating oil, the rollers and the rolling grooves can be lubricated by the lubricating oil.

[0019] The present application is further configured as follows: a vent hole is provided on the side of the piston cylinder away from the roller, and air pressure is injected into the spring groove.

[0020] By adopting the above technical solution and providing the vent hole, the air pressure of the piston cylinder can be kept balanced, and the purpose of the piston plate discharging the lubricating oil can be achieved.

[0021] The present application is further configured as follows: the fixing mechanism includes a threaded groove and a bolt, a screw hole is provided on the mounting plate, a threaded groove is provided on the left side of the wheel hub, and the bolt is threadedly connected to the screw hole and the threaded groove.

[0022] By adopting the above technical solution and providing a fixing mechanism, the wheel hub can be fixed to the mounting plate, thereby achieving the purpose of connecting and fixing the wheel hub to the outer ring of the bearing.

[0023] The present application is further configured as follows: an axial hole is provided on the inner ring of the bearing, and an axle body is installed in the axial hole.

[0024] By adopting the above technical solution and providing the shaft hole and the shaft body, the inner ring of the bearing can be installed and connected to the shaft body.

[0025] The beneficial effects of this application are:

[0026] (1) Through the cooperation of the spring, the support plate, the support seat and the ball, the support seat can be driven to move toward the side close to the roller by the spring elastic force, so that the ball can keep close contact with the roller, and the purpose of ensuring the automatic adjustment of the clearance between the outer ring of the bearing and the inner ring of the bearing can be achieved, thereby reducing the use cost and facilitating the use;

[0027] (2) Through the cooperation of the piston rod, the piston plate and the oil filling pipe, when the support plate moves toward the side close to the roller, the lubricating oil in the piston cylinder can be injected into the roller groove through the oil filling pipe through the piston plate, which can reduce the friction between the roller and the roller groove, reduce the degree of roller wear, and thus extend the service life of the roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0029] Figure 1 This is a schematic diagram of the three-dimensional structure of a hub fixing structure without adjusting bearing clearance in the present application;

[0030] Figure 2 This is a schematic diagram of the main structure of a hub fixing structure without adjusting bearing clearance in the present application;

[0031] Figure 3 This is a schematic diagram of structure A of a hub fixing structure without adjusting bearing clearance in the present application;

[0032] Figure 4 This is a schematic diagram of the three-dimensional structure of the piston mechanism of the hub fixing structure without adjusting the bearing clearance of the present application.

[0033] In the figure: 1. Bearing outer ring; 2. Bearing inner ring; 3. Mounting plate; 4. Wheel hub; 5. Threaded groove; 6. Bolt; 7. Roller groove; 8. Roller; 9. Spring groove; 10. Spring; 11. Support plate; 12. Support seat; 13. Ball; 14. Piston cylinder; 15. Piston rod; 16. Piston plate; 17. Oil filling pipe; 18. One-way valve; 19. Shaft body; 20. Shaft hole; 21. Vent hole. DETAILED DESCRIPTION

[0034] The technical solutions of this application will be described clearly and completely below with reference to specific embodiments. Obviously, the embodiments described are only a portion of the embodiments of this application, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of this application without creative effort are also within the scope of protection of this application.

[0035] See also Figure 1-Figure 4 The present application provides a hub fixing structure without adjusting bearing clearance, including a bearing main body, the bearing main body including a bearing outer ring 1 and a bearing inner ring 2, the bearing outer ring 1 is sleeved on the outside of the bearing inner ring 2, a wheel hub 4 is sleeved on the outside of the bearing outer ring 1, and a rolling mechanism is arranged between the bearing outer ring 1 and the bearing inner ring 2; a spring groove 9 is opened in the bearing outer ring 1, a tensioning mechanism is arranged in the spring groove 9, a piston mechanism is arranged on the inner wall of one side of the spring groove 9, a mounting plate 3 is fixedly installed on the left side of the bearing outer ring 1, and a fixing mechanism is arranged between the mounting plate 3 and the wheel hub 4.

[0036] Specifically, the rolling mechanism includes a rolling groove 7 and a roller 8. A rolling groove 7 is provided on one side adjacent to the bearing outer ring 1 and the bearing inner ring 2. A roller 8 is provided in the rolling groove 7. The roller 8 is rollingly connected to the rolling groove 7, and the rolling groove 7 is connected to the corresponding spring groove 9.

[0037] Specifically, the tensioning mechanism includes a spring 10 and a support plate 11. The spring 10 is fixedly mounted on the inner wall of the spring groove 9 away from the roller 8. The support plate 11 is fixedly mounted on the other end of the spring 10. A connecting mechanism is provided on the support plate 11.

[0038] Specifically, the connection mechanism includes a support seat 12 and a ball 13. The support seat 12 is fixedly installed on the side of the support plate 11 close to the roller 8. The ball 13 is rollingly installed on the side of the support seat 12 close to the ball 13. The ball 13 is adapted to the corresponding roller 8.

[0039] Specifically, the piston mechanism includes a piston cylinder 14, a piston rod 15 and a piston plate 16. The piston cylinder 14 is fixedly mounted on the inner wall of one side of the spring groove 9, and the piston rod 15 is slidably mounted on the side of the piston cylinder 14 close to the support plate 11. The end of the piston rod 15 close to the roller 8 extends into the piston cylinder 14, and the end of the piston rod 15 close to the roller 8 is fixedly mounted with a piston plate 16. The piston plate 16 is slidably connected to the inner wall of the piston cylinder 14, and an oil injection mechanism is provided on the side of the piston cylinder 14 close to the roller 8.

[0040] Specifically, the oil filling mechanism includes an oil filling pipe 17 and a one-way valve 18 . The oil filling pipe 17 is provided on the side of the piston cylinder 14 close to the roller 8 , and the one-way valve 18 is provided in the oil filling pipe 17 .

[0041] Specifically, the piston cylinder 14 is filled with lubricating oil, and the lubricating oil is adapted to the oil filling pipe 17 .

[0042] Specifically, a vent hole 21 is opened on the side of the piston cylinder 14 away from the roller 8 , and air pressure is injected into the spring groove 9 .

[0043] Specifically, the fixing mechanism includes a threaded groove 5 and a bolt 6 . A screw hole is provided on the mounting plate 3 , and a threaded groove 5 is provided on the left side of the wheel hub 4 . The bolt 6 is threadedly connected to the screw hole and the threaded groove 5 .

[0044] Specifically, an axial hole 20 is formed on the bearing inner ring 2 , and a shaft body 19 is installed in the axial hole 20 .

[0045] In the present application, during use, the bearing outer ring 1 can drive the wheel hub 4 to rotate on the bearing inner ring 2 through the roller 8. After long-term operation, the roller 8 will wear, causing the clearance between the bearing outer ring 1 and the bearing inner ring 2 to increase. The spring 10 can use its elastic force to push the support plate 11 toward the side close to the roller 8, and can drive the support seat 12 to move toward the side close to the roller 8. This can achieve the purpose of maintaining a close fit between the ball 13 and the roller 8, and can achieve the purpose of ensuring that the clearance between the bearing outer ring 1 and the bearing inner ring 2 is automatically adjusted, thereby reducing the cost of use and facilitating use. When the support plate 11 moves toward the side close to the roller 8, it can drive the piston rod 15 and the piston plate 16 to move toward the side close to the roller 8, and can achieve the purpose of injecting lubricating oil in the piston cylinder 14 into the oil filling pipe 17 through the piston plate 16, and can achieve the purpose of injecting lubricating oil into the roller groove 7 through the oil filling pipe 17. This can reduce the friction between the roller 8 and the roller groove 7, reduce the degree of wear of the roller 8, and thus extend the service life of the roller 8.

Claims

1. A hub fixing structure without adjusting bearing clearance, characterized in that: The invention comprises a bearing body, wherein the bearing body comprises a bearing outer ring (1) and a bearing inner ring (2), wherein the bearing outer ring (1) is sleeved on the outer side of the bearing inner ring (2), a wheel hub (4) is sleeved on the outer side of the bearing outer ring (1), and a rolling mechanism is provided between the bearing outer ring (1) and the bearing inner ring (2); A spring groove (9) is provided in the bearing outer ring (1), a tensioning mechanism is provided in the spring groove (9), a piston mechanism is provided on an inner wall of one side of the spring groove (9), a mounting plate (3) is fixedly installed on the left side of the bearing outer ring (1), and a fixing mechanism is provided between the mounting plate (3) and the wheel hub (4).

2. The wheel hub fixing structure without adjusting bearing clearance according to claim 1, characterized in that: The rolling mechanism comprises a rolling groove (7) and a roller (8); a rolling groove (7) is provided on one side of the bearing outer ring (1) and the bearing inner ring (2); a roller (8) is provided in the rolling groove (7); the roller (8) is rollingly connected to the rolling groove (7); and the rolling groove (7) is connected to a corresponding spring groove (9).

3. The wheel hub fixing structure without adjusting bearing clearance according to claim 1, characterized in that: The tensioning mechanism comprises a spring (10) and a support plate (11); a spring (10) is fixedly mounted on the inner wall of the spring groove (9) away from the roller (8); a support plate (11) is fixedly mounted on the other end of the spring (10); and a connecting mechanism is provided on the support plate (11).

4. The wheel hub fixing structure without adjusting bearing clearance according to claim 3, characterized in that: The connection mechanism comprises a support seat (12) and a ball (13); the support seat (12) is fixedly mounted on the side of the support plate (11) close to the roller (8); the ball (13) is rollably mounted on the side of the support seat (12) close to the ball (13); and the ball (13) is adapted to the corresponding roller (8).

5. The wheel hub fixing structure without adjusting bearing clearance according to claim 1, characterized in that: The piston mechanism comprises a piston cylinder (14), a piston rod (15) and a piston plate (16); the piston cylinder (14) is fixedly mounted on the inner wall of one side of the spring groove (9); the piston rod (15) is slidably mounted on the side of the piston cylinder (14) close to the support plate (11); the end of the piston rod (15) close to the roller (8) extends into the piston cylinder (14); the end of the piston rod (15) close to the roller (8) is fixedly mounted on the piston plate (16); the piston plate (16) is slidably connected to the inner wall of the piston cylinder (14); and an oil injection mechanism is provided on the side of the piston cylinder (14) close to the roller (8).

6. The wheel hub fixing structure without adjusting bearing clearance according to claim 5, characterized in that: The oil injection mechanism comprises an oil injection pipe (17) and a one-way valve (18). The piston cylinder (14) is provided with an oil injection pipe (17) on a side close to the roller (8), and the one-way valve (18) is provided in the oil injection pipe (17).

7. The wheel hub fixing structure without adjusting bearing clearance according to claim 5, characterized in that: The piston cylinder (14) is filled with lubricating oil, and the lubricating oil is adapted to the oil filling pipe (17).

8. The wheel hub fixing structure without adjusting bearing clearance according to claim 5, characterized in that: A vent hole (21) is provided on the side of the piston cylinder (14) away from the roller (8), and air pressure is injected into the spring groove (9).

9. The wheel hub fixing structure without adjusting bearing clearance according to claim 1, characterized in that: The fixing mechanism comprises a threaded groove (5) and a bolt (6); a screw hole is provided on the mounting plate (3); a threaded groove (5) is provided on the left side of the wheel hub (4); and the bolt (6) is threadedly connected to the screw hole and the threaded groove (5).

10. The wheel hub fixing structure without adjusting bearing clearance according to claim 1, characterized in that: An axial hole (20) is provided on the bearing inner ring (2), and an axial body (19) is installed in the axial hole (20).

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