Automobile wheel hub unit preventing bolt loosening

Abstract

The utility model discloses a kind of automobile wheel hub units to prevent bolt loosening, including wheel hub body, the surface of wheel hub body one side is fixedly connected with connecting plate, the surface of connecting plate is provided with multiple connecting screw holes, connecting screw hole is equipped with oil cavity at the connecting place of wheel hub body, the one end of oil cavity inner wall is provided with diaphragm assembly, the inside of oil cavity is provided with oil pressure mechanism, the top of oil cavity inner wall is equipped with release slot, the inside of release slot is provided with piston mechanism, the one side of release slot and oil cavity connecting place is equipped with oiling mechanism, the utility model discloses a kind of automobile wheel hub units to prevent bolt loosening, the device is provided with oil cavity in connecting screw hole inside one side, methyl silicone oil is provided in the inside of oil cavity, methyl silicone oil expands under heat, can make spacing diaphragm deformation, make friction plate contact bolt surface, provide a friction and radial force for bolt, can greatly improve the anti-loosening ability of bolt, ensure the safety of driving.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive wheel hub units, specifically an automotive wheel hub unit that prevents bolts from loosening. Background Technology

[0002] The wheel hub unit is a core component of the automotive chassis system, responsible for connecting the wheels, transmitting power, supporting the vehicle's weight, and ensuring the wheel's rotational accuracy. It integrates multiple traditional components such as the wheel hub, bearings, and seals into a modular assembly, featuring a compact structure, high reliability, and convenient installation. It is widely used in various passenger cars, commercial vehicles, and new energy vehicles. The wheel hub unit is typically bolted to the vehicle. The connecting holes of the wheel hub unit have internal threads, and bolts are directly screwed into these threads for fixation. This method is quite common. Bolt fixation is crucial, as bolts can easily loosen due to bumps during vehicle operation. Therefore, a wheel hub unit that prevents bolt loosening is needed. Current technologies for preventing bolt loosening generally involve injecting glue between the threaded hole and the bolt. However, this common method of preventing bolt loosening still has shortcomings.

[0003] While glue can greatly reduce the occurrence of loose bolts while driving, it is inconvenient to use during later maintenance or replacement of wheel hub units, as the glue layer needs to be broken first, which is time-consuming and laborious. Utility Model Content

[0004] The purpose of this invention is to provide a car wheel hub unit that prevents bolts from loosening, in order to solve the problem mentioned in the background art that although the glue can greatly reduce the occurrence of bolts loosening when the car is in motion, it is inconvenient to use the glue for later maintenance or replacement of the car wheel hub unit, as it requires breaking the glue layer first, which is time-consuming and laborious.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a car wheel hub unit for preventing bolt loosening, comprising a wheel hub body, a connecting plate fixedly connected to one side of the surface of the wheel hub body, a plurality of connecting screw holes provided on the surface of the connecting plate, an oil chamber provided at the connection between the connecting screw holes and the wheel hub body, a diaphragm assembly provided at one end of the inner wall of the oil chamber, an oil pressurization mechanism provided inside the oil chamber, a release groove provided at the top of the inner wall of the oil chamber, a piston mechanism provided inside the release groove, and an oil injection mechanism provided on one side of the connection between the release groove and the oil chamber.

[0006] Preferably, the diaphragm assembly includes a limiting diaphragm, and a friction plate is provided on one side of the limiting diaphragm. The limiting diaphragm is disposed inside the oil cavity, which facilitates deformation to allow the friction plate to contact the bolt and prevent the bolt from loosening.

[0007] Preferably, the oil pressurization mechanism includes two heating elements and a pressure sensor. The pressure sensor is installed at the bottom of the inner wall of the oil chamber, and the two heating elements are respectively installed on both sides of the inner wall of the oil chamber. The oil chamber is filled with methyl silicone oil, which is beneficial for the oil inside the oil chamber to expand when heated, driving the deformation of the limiting diaphragm.

[0008] Preferably, the piston mechanism includes a piston plate, a rotating hole is provided on one side of the piston plate, a release screw is rotatably connected inside the rotating hole, and a piston head is fixedly connected to the other side of the piston plate. The piston head is slidably connected inside the release groove, which helps to reduce the pressure of methyl silicone oil on the limiting diaphragm. At this time, the limiting diaphragm is reset, the bolt can be removed, and the maintenance efficiency is not affected.

[0009] Preferably, a threaded sleeve is fixedly connected at the connection between the release groove and the connecting plate, the threaded sleeve is in communication with the release groove, and the release screw is threaded inside the threaded sleeve.

[0010] Preferably, the oil injection mechanism includes an oil injection screw hole, which is formed on the connecting plate. A sealing gasket is provided at the connection between the oil injection screw hole and the connecting plate. An oil injection screw is connected to the internal thread of the oil injection screw hole, which facilitates the injection and sealing of oil.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: An oil chamber is provided on one side inside the connecting screw hole, and methyl silicone oil is provided inside the oil chamber. The methyl silicone oil expands when heated, which can deform the limiting diaphragm and make the friction plate contact the bolt surface, providing the bolt with a frictional force and radial force, which can greatly improve the bolt's anti-loosening ability and ensure driving safety; a release groove is provided. When the methyl silicone oil is in a heated expansion state and the wheel hub unit needs to be disassembled for maintenance, we rotate the release screw, which moves towards the oil chamber and drives the piston head to move, making room in the release groove. At this time, part of the expanded methyl silicone oil enters the interior of the release groove, reducing the pressure of the methyl silicone oil on the limiting diaphragm. At this time, the limiting diaphragm resets, and the bolt can be removed without affecting maintenance efficiency. Attached Figure Description

[0012] Figure 1 This is a structural diagram of the automobile wheel hub unit for preventing bolt loosening according to this utility model;

[0013] Figure 2 A is a partial enlarged view of the structure of the automobile wheel hub unit for preventing bolt loosening according to this utility model;

[0014] Figure 3 This is a cross-sectional view of the structure of the automobile wheel hub unit for preventing bolt loosening according to this utility model;

[0015] Figure 4 This is a partial enlarged view (B) of the structure of the automobile wheel hub unit for preventing bolt loosening according to this utility model;

[0016] Figure 5 This is a structural diagram of the piston assembly of an automotive wheel hub unit for preventing bolt loosening, as per this utility model.

[0017] In the diagram: 1. Hub body; 2. Connecting plate; 3. Connecting screw hole; 4. Oil chamber; 5. Limiting diaphragm; 6. Friction plate; 7. Heating plate; 8. Pressure sensor; 9. Oil injection screw hole; 10. Sealing gasket; 11. Oil injection screw; 12. Release groove; 13. Threaded sleeve; 14. Piston head; 15. Piston plate; 16. Rotation hole; 17. Release screw. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0019] Please see Figure 1-5 This utility model provides a car wheel hub unit to prevent bolts from loosening, including a wheel hub body 1. A connecting plate 2 is fixedly connected to one side of the surface of the wheel hub body 1. The surface of the connecting plate 2 is provided with a plurality of connecting screw holes 3. An oil chamber 4 is provided at the connection between the connecting screw holes 3 and the wheel hub body 1. A diaphragm assembly is provided at one end of the inner wall of the oil chamber 4. An oil pressurization mechanism is provided inside the oil chamber 4. A release groove 12 is provided at the top of the inner wall of the oil chamber 4. A piston mechanism is provided inside the release groove 12. An oil injection mechanism is provided on one side of the connection between the release groove 12 and the oil chamber 4.

[0020] See Figure 2 , Figure 3 , Figure 4 and Figure 5 Furthermore, the diaphragm assembly includes a limiting diaphragm 5, with a friction plate 6 disposed on one side of the limiting diaphragm 5. The limiting diaphragm 5 is disposed inside the oil chamber 4. The oil pressurization mechanism includes two heating elements 7 and a pressure sensor 8. The pressure sensor 8 is installed at the bottom of the inner wall of the oil chamber 4, and the two heating elements 7 are respectively installed on both sides of the inner wall of the oil chamber 4. The oil chamber 4 is filled with methyl silicone oil. The piston mechanism includes a piston plate 15, with a rotating hole 16 opened on one side of the piston plate 15. A release screw is rotatably connected inside the rotating hole 16. A piston head 14 is fixedly connected to the other side of the piston plate 15 and the piston rod 17. The piston head 14 is slidably connected inside the release groove 12. A threaded sleeve 13 is fixedly connected to the connection between the release groove 12 and the connecting plate 2. The threaded sleeve 13 communicates with the release groove 12. The release screw 17 is threadedly connected inside the threaded sleeve 13. The oil injection mechanism includes an oil injection screw hole 9. The oil injection screw hole 9 is opened on the connecting plate 2. A sealing gasket 10 is provided at the connection between the oil injection screw hole 9 and the connecting plate 2. An oil injection screw 11 is threadedly connected inside the oil injection screw hole 9.

[0021] In use, the heating element 7 is activated to heat the methyl silicone oil inside the oil chamber 4. At this time, the methyl silicone oil expands due to heat, and the pressure sensor 8 can detect the pressure inside the oil chamber 4 in real time. Combined with the control module on the vehicle itself, the internal pressure of the oil chamber 4 can be adjusted in real time. The expansion of the methyl silicone oil causes the limiting diaphragm 5 to deform, so that the friction plate 6 contacts the surface of the fixing bolt, which can provide friction and radial force to the bolt, and can prevent the bolt from loosening as much as possible. When it is necessary to disassemble the wheel hub body 1, we can rotate the release screw 17 to move it away from the connecting plate 2. In the initial state, the release groove 12 is blocked by the piston head 14. The piston head 14 moves to make room for part of the interior of the release groove 12, and some of the methyl silicone oil will enter the interior of the release groove 12. The pressure inside the oil chamber 4 approaches normal. At this time, the limiting diaphragm 5 and the friction plate 6 are reset, and the bolt can be easily removed.

[0022] In this embodiment, the following steps are taken during use: First, the diaphragm assembly is installed inside the oil chamber 4. Under normal conditions, the diaphragm assembly does not affect the normal use of the bolt. The friction plate 6 is installed in the middle of the limiting diaphragm 5, and the friction plate 6 is elongated to increase the contact surface with the bolt, thus achieving a better anti-loosening effect. Methyl silicone oil is injected into the oil chamber 4 through the oil injection screw hole 9. Then, the oil injection screw 11 is screwed in, and a sealing gasket 10 is placed between the oil injection screw 11 and the connecting plate 2 to prevent oil leakage. The piston head 14 and the end of the oil injection screw 11 are flush with the inner wall of the oil chamber 4. In high temperatures or when heated automatically by the heating element 7, the pressure is detected by the pressure sensor 8 to ensure stable pressure inside the oil chamber 4. Generally, the heating element 7 can be activated automatically when the car is in motion. When the car is stopped, in order to extend the life of the bolt anti-loosening mechanism... The piston head 14 is generally not activated when the vehicle is stationary. It is during vehicle operation that bolt loosening is more likely to occur. The connection between the piston head 14 and the release groove 12 is sealed, ensuring a seal even during sliding and preventing leakage of methyl silicone oil. In hot weather or when the vehicle is being serviced for wheel hub unit maintenance, the wheel hub unit may need to be disassembled directly to improve work efficiency. In this case, the release mechanism can reset the limiting diaphragm 5, facilitating bolt removal. The limiting diaphragm 5 is made of nitrile rubber, which is highly resistant to oil and aging. It should be noted that this invention is a wheel hub unit designed to prevent bolt loosening. All components are standard parts or parts known to those skilled in the art, and their structure and principles can be learned from technical manuals or conventional experimental methods.

[0023] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A car wheel hub unit for preventing bolt loosening, comprising a wheel hub body (1), characterized in that: A connecting plate (2) is fixedly connected to one side of the surface of the hub body (1). The surface of the connecting plate (2) is provided with multiple connecting screw holes (3). An oil chamber (4) is opened at the connection between the connecting screw hole (3) and the hub body (1). A diaphragm assembly is provided at one end of the inner wall of the oil chamber (4). An oil pressurization mechanism is provided inside the oil chamber (4). A release groove (12) is opened at the top of the inner wall of the oil chamber (4). A piston mechanism is provided inside the release groove (12). An oil injection mechanism is opened on one side of the connection between the release groove (12) and the oil chamber (4).

2. The automotive wheel hub unit for preventing bolt loosening according to claim 1, characterized in that: The diaphragm assembly includes a limiting diaphragm (5), a friction plate (6) is provided on one side of the limiting diaphragm (5), and the limiting diaphragm (5) is disposed inside the oil cavity (4).

3. The automotive wheel hub unit for preventing bolt loosening according to claim 1, characterized in that: The oil pressurization mechanism includes two heating elements (7) and a pressure sensor (8). The pressure sensor (8) is installed at the bottom of the inner wall of the oil chamber (4). The two heating elements (7) are respectively installed on both sides of the inner wall of the oil chamber (4). The interior of the oil chamber (4) is filled with methyl silicone oil.

4. The automotive wheel hub unit for preventing bolt loosening according to claim 1, characterized in that: The piston mechanism includes a piston plate (15), a rotating hole (16) is provided on one side of the piston plate (15), a release screw (17) is rotatably connected inside the rotating hole (16), and a piston head (14) is fixedly connected to the other side of the piston plate (15), the piston head (14) is slidably connected inside the release groove (12).

5. A car wheel hub unit for preventing bolt loosening according to claim 4, characterized in that: A threaded sleeve (13) is fixedly connected at the connection between the release groove (12) and the connecting plate (2). The threaded sleeve (13) communicates with the release groove (12), and the release screw (17) is threadedly connected inside the threaded sleeve (13).

6. A car wheel hub unit for preventing bolt loosening according to claim 1, characterized in that: The oil injection mechanism includes an oil injection screw hole (9), which is opened on the connecting plate (2). A sealing gasket (10) is provided at the connection between the oil injection screw hole (9) and the connecting plate (2). An oil injection screw (11) is threadedly connected to the inside of the oil injection screw hole (9).

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