Automatic inflation hub bearing

Abstract

The utility model discloses an automatic inflation hub bearing. The automatic inflation hub bearing comprises a hub bearing and a bell housing, the hub bearing comprises a flange outer ring, a flange inner ring and a small inner ring, a locking groove is formed in the end, inserted into the flange inner ring, of the bell housing, a locking bolt is arranged on an inner hole of the flange inner ring, the head of the locking bolt abuts against the end face of the flange outer ring, and the rod portion of the locking bolt is in threaded fit with the locking groove. A center hole is formed in the center of the rod portion of the locking bolt, and a dynamic sealing assembly is arranged between the outer wall of the bell-shaped shell and the small inner ring. The air conditioner is simple in structure, reasonable in layout, good in overall air tightness and good in using effect.

Description

Technical Field

[0001] The utility model relates to an automatic inflation hub bearing. Background Art

[0002] When the tire pressure drops by 0.1 kg / cm 2 , 2 , 2 compared with the standard air pressure, the fuel consumption increases by 2%; when the air pressure drops by 0.2 kg / cm 2 , the fuel consumption increases by 4% - 6%; when the air pressure drops by 0.4 kg / cm 2 , the fuel consumption increases by more than 10%. When the vehicle is running normally, especially when encountering potholes or curbs on the road surface, the osmosis effect and seasonal changes in temperature will cause the tire to gradually deflate. Compared with the tire with normal inflation, the underinflated tire has a decrease in tire life, vehicle handling performance, and fuel economy. Especially when the tire pressure is insufficient, the vehicle running at high speed is prone to a flat tire, leading to danger. At present, many vehicles are equipped with a tire pressure monitoring system. Its working principle is that when the tire pressure drops significantly, it will send an alarm to the vehicle driver, prompting the driver to inflate the tire and restore the tire pressure to the normal level. However, this process relies on the driver to inflate the tire, and without an external air source, the driver cannot inflate the tire. Therefore, during the driving process, the tire automatic inflation device plays a crucial role in the safety, convenience, and stability of vehicle driving. However, currently, there is a lack of a structure for automatic inflation without changing the structure of the hub bearing and the transmission shaft, which is likely to affect the safety and convenience during driving and the driving efficiency. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides an automatic inflation hub bearing, which has a simple structure, reasonable layout, good overall airtightness, and good use effect.

[0004] To achieve the above object, the utility model provides an automatic inflation hub bearing, which includes a hub bearing for connecting a vehicle wheel tire and a brake disc, and a bell housing arranged on the hub bearing for transmitting power torque; the hub bearing includes a flange outer ring, a flange inner ring, and a small inner ring installed on the journal of the flange inner ring. One end of the bell housing inserted into the flange inner ring is formed with a locking groove. A locking bolt is arranged on the inner hole of the flange inner ring. The head of the locking bolt abuts against the end face of the flange outer ring. The rod part of the locking bolt is in threaded fit with the locking groove. A central hole is formed in the center of the rod part of the locking bolt. An air nozzle is fitted on the central hole. A number of continuous chambers are formed by combining the flange inner ring, the locking bolt, the bell housing, the dynamic sealing component, the small inner ring, and the flange outer ring. A dynamic sealing component for connecting an air pump to inflate and deflate the chambers is arranged between the outer wall of the bell housing and the small inner ring.

[0005] The beneficial effects of such a setting are as follows: With such a setting, through the locking bolt with a central hole, by passing through the inner hole of the inner ring of the hub bearing flange and being screwed and matched with the bell housing, a firm connection and convenient separation between the hub bearing and the bell housing are achieved. This design not only ensures the sealing performance of the hub bearing but also facilitates maintenance and replacement. The dynamic sealing component can provide dynamic sealing for the hub bearing by connecting to an external air pump device, ensuring stable air pressure and contributing to maintaining the normal working state of the hub bearing. At the same time, the structure with interconnected cavities ensures stable air pressure between components, further improving the performance and reliability of the hub bearing. Adding a dynamic sealing module without changing the structure of the hub bearing and the drive shaft does not require additional weight and other structures, effectively controlling costs. It also ensures high-efficiency power transmission and wheel stability, providing an important guarantee for the overall performance and safety of the vehicle.

[0006] As a further setting of the present utility model, the inner ring of the flange, the locking bolt, and the bell housing form a first cavity, the dynamic sealing component, the small inner ring, and the bell housing form a second cavity, and a third cavity is formed between the outer ring of the flange and the inner ring of the flange. The first cavity, the second cavity, the third cavity, and the central hole are interconnected.

[0007] The beneficial effects of such a setting are as follows: With such a setting, it is ensured that each chamber is interconnected, guaranteeing the use effect of the overall structure. At the same time, the structure is simple and easy to implement, having a good use effect.

[0008] As a further setting of the present utility model, the dynamic sealing component includes a base body and sealing lips provided on both sides of the base body. The base body is provided with mounting ears for connecting to an external steering knuckle and air holes for connecting to an air pump.

[0009] The beneficial effects of such a setting are as follows: With such a setting, it is convenient for the connection and installation of components, improving the adaptability of the structure and effectively enhancing the installation efficiency of the structure, having a good use effect.

[0010] As a further setting of the present utility model, the sealing lip includes a skeleton, a first lip body, and a second lip body. One end of the skeleton is connected to the edge of the base body, and the other end of the skeleton extends towards the small inner ring or the bell housing. The first lip body and the second lip body are connected to the skeleton, and a contact groove is formed between the first lip body and the second lip body, and the contact groove abuts against the small inner ring or the bell housing.

[0011] The beneficial effects of such a setting are as follows: With such a setting, by setting the sealing lip in this way, it can better prevent external impurities from entering and effectively prevent the leakage of internal lubricating oil, ensuring the normal operation and long-term durability of the hub bearing and the transmission system. At the same time, the structure is simple and the sealing is reliable, having good use reliability.

[0012] As a further arrangement of the utility model, an O-ring is also nested on the first lip body.

[0013] The beneficial effect of such an arrangement is as follows: With such an arrangement, preferably, the sealing pressure between the O-ring and the sealing lip is greater than 0.3 Mpa. With such an arrangement, after the sealing lip is worn, the O-ring can still continuously maintain the air cavity sealing performance, ensuring the reliability of the structure in use.

[0014] As a further arrangement of the utility model, a first tooth and a second tooth that are engaged with each other are formed between the inner ring of the flange and the bell-shaped housing, and a tip clearance is formed between the first tooth and the second tooth.

[0015] The beneficial effect of such an arrangement is as follows: With such an arrangement, the first tooth and the second tooth are engaged with each other, that is, the root part and the tip part of the end face teeth of the inner ring of the flange and the bell-shaped housing correspond to each other. Rounding corners are provided at both the root and the tip of the end face teeth. When the locking bolts are in the locked state, there is a certain tip clearance between the two end face teeth. Preferably, the tip clearance is set to 0.1 - 0.3 times the chamfer radius. Through the tip clearance, an air cavity is constructed inside the bearing. Compared with constructing an air cavity outside, there is no need to additionally increase the weight and other structures, making the overall structure more compact and having a good use effect. Description of the Drawings

[0016] Figure 1 It is a schematic structural view of an embodiment of the utility model;

[0017] Figure 2 It is a schematic structural view of the dynamic sealing assembly in an embodiment of the utility model;

[0018] Figure 3 It is an embodiment of the utility model Figure 1 A partial enlarged view of part A in the figure. Detailed Embodiment

[0019] The utility model provides an automatically inflatable hub bearing, as Figures 1 to 3As shown in the figure, it includes a hub bearing for connecting a wheel tire and a brake disc, and a bell housing 3 arranged on the hub bearing for transmitting power torque; the hub bearing includes a flange outer ring 2, a flange inner ring 1, and a small inner ring 4 installed on the journal of the flange inner ring 1. A locking groove 31 is formed at one end of the bell housing 3 inserted into the flange inner ring 1. A locking bolt 5 is arranged on the inner hole of the flange inner ring 1. The head of the locking bolt 5 abuts against the end face of the flange outer ring 2. The rod part of the locking bolt 5 is in threaded fit with the locking groove 31. A central hole 51 is formed in the center of the rod part of the locking bolt 5. An air vent is fitted on the central hole 51. Several continuous chambers are formed by combining the flange inner ring, the locking bolt, the bell housing, the dynamic sealing component, the small inner ring, and the flange outer ring. A dynamic sealing component for connecting an air pump to inflate and deflate the chambers is arranged between the outer wall of the bell housing and the small inner ring. The flange inner ring 1, the locking bolt 5, and the bell housing 3 form a first chamber. The dynamic sealing component, the small inner ring 4, and the bell housing 3 form a second chamber. A third chamber is formed between the flange outer ring 2 and the flange inner ring 1. The first chamber, the second chamber, the third chamber, and the central hole 51 are connected and communicated. The beneficial effect of such a setting is as follows: With such a setting, through the locking bolt 5 with the central hole 51, by passing through the inner hole of the flange inner ring 1 of the hub bearing and being screwed and matched with the bell housing 3, a firm connection and convenient separation between the hub bearing and the bell housing 3 are achieved. This design not only ensures the sealing performance of the hub bearing but also facilitates maintenance and replacement. The dynamic sealing component can provide dynamic sealing of the hub bearing by connecting an external air pump device, ensuring stable air pressure and contributing to maintaining the normal working state of the hub bearing. At the same time, the structure with the connection and communication of each chamber ensures stable air pressure between components, further improving the performance and reliability of the hub bearing. Adding a dynamic sealing module without changing the structure of the hub bearing and the transmission shaft does not require additional weight and other structures, effectively controlling costs. At the same time, it also ensures high-efficiency power transmission and wheel stability, providing an important guarantee for the overall performance and safety of the vehicle.

[0020] As a further setting of this embodiment, the dynamic sealing component includes a base body 6 and sealing lips arranged on both sides of the base body 6. An installation ear 62 for connecting an external steering knuckle and an air hole 61 for connecting an air pump are arranged on the base body 6. The beneficial effect of such a setting is as follows: With such a setting, it is convenient for the connection and installation of components, improves the adaptability of the structure, effectively improves the installation efficiency of the structure, and has a good use effect.

[0021] As a further configuration of this embodiment, the sealing lip comprises a skeleton 7, a first lip body 71 and a second lip body 72, one end of the skeleton 7 is connected to the edge of the base 6, the other end of the skeleton 7 is extended toward the small inner ring 4 or the bell housing 3, the first lip body 71 and the second lip body 72 are connected to the skeleton 7, a conflict groove is formed between the first lip body 71 and the second lip body 72, and the conflict groove is in contact with the small inner ring 4 or the bell housing 3. The beneficial effect of such configuration is that the sealing lip is configured in such a manner, so that external impurities can be better prevented from entering, and the internal lubricating oil can be effectively prevented from leaking out, thereby ensuring the normal operation and long-term durability of the hub bearing and the transmission system, and the structure is simple, the sealing is reliable, and the reliability of use is good.

[0022] As a further configuration of this embodiment, an O-ring 73 is further embedded on the first lip body 71. The beneficial effect of such configuration is that, preferably, the sealing pressure between the O-ring 73 and the sealing lip is greater than 0.3 Mpa, and after the sealing lip is worn, the O-ring 73 can still maintain the air cavity sealing performance, thereby ensuring the reliability of the structure.

[0023] As a further configuration of this embodiment, a first tooth 31 and a second tooth 11 meshing with each other are formed between the flange inner ring 1 and the bell housing 3, and a tooth top clearance is formed between the first tooth 31 and the second tooth 11. The beneficial effect of such configuration is that the first tooth 31 and the second tooth 11 mesh with each other, that is, the tooth root part of the end face tooth portion of the flange inner ring 1 and the bell housing 3 corresponds to the tooth top part, and the tooth root and the tooth top part of the end face tooth portion are both provided with fillets. When the locking bolt 5 is in the locked state, there is a certain tooth top clearance between the two end face tooth portions, and the tooth top clearance is preferably set to 0.1 to 0.3 times the chamfer radius. Through the tooth top clearance, an air cavity is constructed inside the bearing, and compared with the external construction of the air cavity, no additional weight and other structures are required, making the overall structure more compact and having a good use effect.

[0024] The above example is only one preferred specific example of the present invention. The common changes and substitutions made by those skilled in the art within the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. An automatic inflation wheel hub bearing, characterized in that: It includes a hub bearing for connecting a wheel tire and a brake disc, and a bell housing arranged on the hub bearing for transmitting power torque; the hub bearing includes a flange outer ring, a flange inner ring and a small inner ring installed on the journal of the flange inner ring. A locking groove is formed at one end of the bell housing inserted into the flange inner ring. A locking bolt is arranged on the inner hole of the flange inner ring. The head of the locking bolt abuts against the end face of the flange outer ring. The rod part of the locking bolt is in threaded fit with the locking groove. A central hole is formed in the center of the rod part of the locking bolt, and an air nozzle is fitted on the central hole. A number of continuous chambers are formed by the combination of the flange inner ring, the locking bolt, the bell housing, the dynamic sealing component, the small inner ring and the flange outer ring. A dynamic sealing component for connecting an air pump to inflate and deflate the chambers is arranged between the outer wall of the bell housing and the small inner ring.

2. The automatic inflation hub bearing according to claim 1, characterized in that: The flange inner ring, the locking bolt and the bell housing are combined to form a first cavity. The dynamic sealing component, the small inner ring and the bell housing are combined to form a second cavity. A third cavity is formed between the flange outer ring and the flange inner ring. The first cavity, the second cavity, the third cavity and the central hole are connected and communicated.

3. The automatic inflation hub bearing according to claim 1, characterized in that: The dynamic sealing component includes a base body and sealing lips arranged on both sides of the base body. An installation ear for connecting an external steering knuckle and an air hole for connecting an air pump are arranged on the base body.

4. The automatic inflation hub bearing according to claim 3, wherein: The sealing lip includes a skeleton, a first lip body and a second lip body. One end of the skeleton is connected to the edge of the base body, and the other end of the skeleton extends towards the small inner ring or the bell housing. The first lip body and the second lip body are connected to the skeleton. A contact groove is formed between the first lip body and the second lip body, and the contact groove abuts against the small inner ring or the bell housing.

5. The automatic inflation hub bearing according to claim 4, wherein: An O-ring is also nested on the first lip body.

6. The automatic inflation hub bearing according to claim 1, wherein: A first tooth and a second tooth that are meshed with each other are formed between the flange inner ring and the bell housing, and a tooth top clearance is formed between the first tooth and the second tooth.

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