CN-121977021-A - Inflatable hub bearing

CN121977021ACN 121977021 ACN121977021 ACN 121977021ACN-121977021-A

Abstract

The invention provides an inflatable hub bearing which comprises a bearing main body, a sealing assembly and a sealing assembly, wherein the bearing main body comprises a flange inner ring and a flange outer ring, a first flange part and a second flange part are respectively arranged on the flange inner ring and the flange outer ring, the sealing assembly comprises a mounting seat, a magnetic sealing ring, an air inlet pipe and an air outlet pipe, the mounting seat is arranged at the first flange part of the bearing main body and is connected with the air outlet pipe, two ends of the magnetic sealing ring are respectively connected with the mounting seat and the air inlet pipe, the magnetic sealing ring comprises a magnetic block for providing pretightening force, and the two ends of the magnetic sealing ring are respectively communicated with the middle section of the air inlet pipe and the middle section of the air outlet pipe between the connection of the mounting seat and the magnetic sealing ring. Aiming at the defects of the prior art, the invention provides an inflatable hub bearing which solves the problems of insufficient sealing force and leakage in the starting stage.

Inventors

HU SHIXIONG
LIU XING
BAI XUEFENG
ZHENG JIAJUN
ZHANG ZHEHAO

Assignees

人本股份有限公司
上海人本集团有限公司

Dates

Publication Date: 20260505
Application Date: 20260407

Claims (10)

1. The inflatable hub bearing comprises a bearing main body and is characterized by comprising a sealing assembly, wherein the sealing assembly comprises a mounting seat, a magnetic sealing ring, an air inlet pipe and an air outlet pipe, the mounting seat is arranged at the first flange of the bearing main body and is connected with the air outlet pipe, two ends of the magnetic sealing ring are respectively connected with the mounting seat and the air inlet pipe, the magnetic sealing ring comprises a magnetic block for providing pretightening force, and two ends of the magnetic sealing ring are respectively communicated with the middle section of the air inlet pipe and the middle section of the air outlet pipe between the connection of the mounting seat and the magnetic sealing ring.
2. The inflatable hub bearing of claim 1, wherein the magnetic seal ring comprises a connecting groove for connecting an air inlet pipe, the connecting groove comprises a bottom surface positioned at the bottom and an air inlet positioned at the bottom surface, and the air inlet forms communication between the air inlet pipe and the middle section.
3. The inflatable hub bearing of claim 2, wherein the mounting seat comprises an annular protruding portion, the magnetic sealing ring comprises an annular groove, the annular groove is sleeved on the protruding portion, and the magnetic block is arranged on the protruding portion and opposite to the bottom of the annular groove.
4. The inflatable hub bearing of claim 2 or 3, wherein the inner diameter and the outer diameter of the convex part are respectively provided with a first concave part extending in the circumferential direction, and a first auxiliary sealing ring elastically abutting against the first concave part and the annular groove is arranged in the first concave part.
5. The inflatable hub bearing of claim 2 or 3, wherein the connecting groove is provided with a second concave part extending in the circumferential direction, and a second auxiliary sealing ring elastically abutting against the second concave part and the air inlet pipe is arranged in the second concave part.
6. The inflatable hub bearing of claim 1, wherein the second flange portion is provided with a limiting groove for the air inlet pipe to penetrate.
7. The inflatable hub bearing of claim 6, wherein the sealing assembly comprises a connecting plate and a gasket, the connecting plate and the gasket are sleeved on the air inlet pipe, screw holes which can be used for being matched with bolts in a threaded mode are formed in the positions, corresponding to the limiting grooves, of the second flange part, and the gasket is arranged between the connecting plate and the second flange part.
8. The inflatable hub bearing of claim 1, wherein the air outlet pipe comprises a flexible connecting pipe and an air guide piece, one end of the flexible connecting pipe is in threaded fit with the air guide piece, and the other end of the flexible connecting pipe is connected to the mounting seat.
9. The inflatable hub bearing of claim 8, wherein the mounting block is arranged in the mounting seat, the mounting block is embedded in the mounting seat, and the flexible connecting pipe is clamped on the mounting block to form connection with the mounting seat.
10. The inflatable hub bearing of claim 8 or 9, wherein a plurality of third sealing rings are sleeved at one end of the flexible connecting pipe connected with the mounting seat.

Description

Inflatable hub bearing Technical Field The invention relates to the field of bearings, in particular to an inflatable hub bearing. Background With the continuous improvement of the requirements of commercial vehicles and special working vehicles on the adaptability to complex road conditions, the central inflation and deflation system of the tire is widely popularized and applied, so that the road conditions of the vehicle running can adjust the internal tire pressure of the tire in real time, the trafficability of the non-paved road vehicles is improved, the abrasion of the tire is reduced, the overall fuel economy of the vehicle is effectively optimized, the vehicle becomes one of the core configurations of heavy vehicles and off-road vehicles, the inflation hub bearing is used as a core matching component of the wheel side inflation and deflation system, the air passage conduction and dynamic sealing between a static inflation and deflation pipeline and a rotary hub component are required to be realized, the working reliability and the service life of the whole inflation and deflation system are directly determined by the rotary sealing performance of the inflation and deflation system, the rotary air passage sealing of the inflation hub bearing is generally adopted by the prior art, the seal belongs to typical pressure driving type seal, the working principle is that the floating seal ring is pushed by medium air pressure in an air passage, so that two matched seal end faces are mutually pressed and attached, meanwhile, in the running process of equipment, dynamic seal is realized by an extremely thin air film formed between the seal end faces, under medium and high pressure working conditions, the structure can provide enough sealing specific pressure by means of sufficient medium pressure, and can realize better sealing effect, so that a large amount of application is realized under conventional inflation and deflation working conditions, but the floating seal in the prior art has obvious working condition dependence, the sealing force is completely dependent on air pressure driving in the air passage, when the system is in low pressure working conditions (generally refers to air pressure lower than 2 bar), for example, the initial air pressure in the air passage is insufficient, the floating seal ring cannot be pushed to generate sufficient axial pretightening force, the tight fit between the sealing end surfaces cannot be realized, a tiny fit clearance exists, the gas path leakage is further caused, the leakage problem can directly lead to slow tire pressure establishment in the starting stage of the inflation and deflation system, the inflation and deflation efficiency is greatly reduced, and even the target tire pressure cannot be reached in serious cases, so that the inflation effect is influenced. Disclosure of Invention Aiming at the defects of the prior art, the invention provides an inflatable hub bearing which solves the problems of insufficient sealing force and leakage in the starting stage. In order to achieve the above purpose, the invention provides an inflatable hub bearing, which comprises a bearing main body and a sealing assembly, wherein the bearing main body comprises a flange inner ring and a flange outer ring, the flange inner ring and the flange outer ring are respectively provided with a first flange part and a second flange part, the sealing assembly comprises a mounting seat, a magnetic sealing ring, an air inlet pipe and an air outlet pipe, the mounting seat is arranged at the first flange part of the bearing main body and is connected with the air outlet pipe, two ends of the magnetic sealing ring are respectively connected with the mounting seat and the air inlet pipe, the magnetic sealing ring comprises a magnetic block for providing pretightening force, and the connection between the mounting seat and the magnetic sealing ring is provided with a middle section, two ends of which are respectively communicated with the air inlet pipe and the air outlet pipe. The bearing has the advantages that the first flange part on the flange inner ring and the flange outer ring of the bearing main body can be directly matched with the installation of the sealing component, the installation seat is fixed on the first flange part, the air outlet pipe can be stably supported, the magnetic sealing ring can be limited, one end of the magnetic sealing ring is connected with the installation seat, the other end of the magnetic sealing ring is connected with the air inlet pipe, the built-in magnetic block can continuously provide stable pretightening force, the sealing surface can be tightly attached no matter in a low-pressure working condition or in a starting stage, leakage due to insufficient air pressure can be avoided like the traditional floating sealing, and the problem that the tire pressure is slowly built up due to leakage is effectively avoided. The invention can be further arrang