Axle inflation connecting structure and axle

Abstract

The utility model discloses an axle inflation connecting structure and an axle. The axle inflation connecting structure comprises the axle, a hub, a connecting pipe, an end cover, a pipe joint and an adapter located on the outer side of the end cover. The key point is that the pipe joint is provided with an air hole penetrating through the pipe joint, a guide pipe communicated with the air hole and the connecting pipe is in clearance fit in the air hole, and the inner end of the guide pipe inwards penetrates through a locking nut at the inner end of the pipe joint and is rotationally connected with the connecting pipe; the adapter is in threaded connection with the pipe joint and communicates with the air hole. Through the structural design, the guide pipe can move in the air hole in the axial direction or the radial direction of the axle, so that the coaxiality between the guide pipe and the connecting pipe is automatically adjusted, it is ensured that the guide pipe and the connecting pipe are coaxial, the situation that the guide pipe is abraded when rotating due to the fact that the guide pipe and the connecting pipe are not coaxial is prevented, and the purpose of prolonging the service life is achieved.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, specifically to an axle inflatable connection structure and an axle. Background Technology

[0002] The axle inflation connection structure of heavy-duty vehicles is used to connect an inflation hose, which connects to the valve stem of the axle tire for inflation. Existing axle inflation connection structures include an axle, a wheel hub, an end cap, a pipe connector connected to the inflation hose, and an adapter connected to the pipe connector. The inflation hose is located inside the axle, the wheel hub is rotatably connected to the axle, the end cap is located on the outside of the axle and is fixed to the outer end face of the wheel hub, the pipe connector is fixed to the outer end of the end cap and rotatably connected to the inflation hose, and the pipe connector and adapter are used to connect the inflation hose and are connected to the pipe connector. However, this structure is prone to wear, resulting in a short service life. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this utility model is to provide an axle inflation connection structure and axle that ensures coaxiality between the conduit and the connecting pipe by adjusting the conduit position of the pipe joint to prevent wear.

[0004] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions:

[0005] The axle inflatable connection structure includes an axle, a hub, a connecting pipe, an end cap, a pipe joint, and an adapter located outside the end cap;

[0006] The wheel hub is rotatably connected to the outer peripheral wall of the axle via a bearing;

[0007] The connecting pipe is located inside the axle;

[0008] The end cap is located on the outside of the axle and is fixedly covered on the outer end of the wheel hub. The outer end of the end cap has a fixing hole that penetrates the end cap.

[0009] The pipe connector is inserted into the fixing hole and its inner end is threaded with a locking nut located between the end cap and the connecting pipe. The pipe connector has an air hole that passes through it from the inside and outside. A conduit that communicates with the air hole and the connecting pipe is fitted inside the air hole with a clearance fit. The inner end of the conduit passes through the locking nut and is rotatably connected to the connecting pipe.

[0010] The adapter is threadedly connected to the pipe joint and communicates with the air hole.

[0011] Furthermore, the pipe fitting includes a positioning pin arranged radially along the axle. The positioning pin is disposed on one of the inner peripheral wall of the air hole and the outer peripheral wall of the conduit. An adjustment hole is formed on the other of the inner peripheral wall of the air hole and the outer peripheral wall of the conduit radially along the axle. The adjustment hole is clearance-fitted with the positioning pin.

[0012] Furthermore, the positioning pin is fixed to the inner peripheral wall of the air hole and extends radially along the axle, and the adjustment hole is provided inwardly on the outer peripheral wall of the guide tube.

[0013] Furthermore, on opposite sides of the outer peripheral wall of the inner end of the pipe connector, a pin hole is respectively opened inward and radially along the axle, communicating with the air hole. The two pin holes correspond to each other. On opposite sides of the outer peripheral wall of the outer end of the conduit, an adjustment hole is respectively opened inward and radially along the axle, communicating with the inner cavity of the conduit. The two adjustment holes correspond to each other. The pipe connector includes a positioning pin, the two ends of which are tightly engaged with the two pin holes, and the portion between the two ends of the positioning pin is clearance-fitted with the adjustment hole; or,

[0014] The two ends of the positioning pin are respectively clearance-fitted with the two pin holes, and the portion between the two ends of the positioning pin is tightly fitted with the adjustment hole.

[0015] Furthermore, it also includes a sealing ring disposed between the inner peripheral wall of the air hole and the outer peripheral wall of the conduit and abutting against both, the sealing ring being sleeved on the outer peripheral wall of the conduit and located outside the adjustment hole.

[0016] Furthermore, there are two sealing rings, which are located on opposite sides of the positioning pin and are in close contact with the inner wall of the air hole and the outer peripheral wall of the conduit.

[0017] Furthermore, the end cap has an outer inner wall corresponding to the outer end face of the end cap, and the outer end of the pipe connector is fitted with an outer flexible washer located outside the outer end face of the end cap and abutting against the outer end face of the end cap and the inner end face of the adapter. The inner end of the pipe connector is fitted with an inner flexible washer between the outer end face of the locking nut and the outer inner wall, and the inner and outer ends of the inner flexible washer abut against the outer end face of the locking nut and the outer inner wall, respectively.

[0018] Furthermore, an axle cap is tightly fitted to the inner peripheral wall of the outer end of the inner cavity of the axle, and an installation hole penetrating the axle cap is opened on the outer end face of the axle cap; the inner end of the connecting pipe is engaged with the installation hole, and a bushing and two sealing elements are fitted to the inner peripheral wall of the outer end of the connecting pipe, with the two sealing elements located at the inner and outer ends of the bushing respectively; the guide tube is coaxial with the connecting pipe and its inner end is clearance-fitted with the bushing, and the inner end of the guide tube is tightly fitted with the two sealing elements.

[0019] This utility model's axle inflation connection structure, through a clearance fit between the guide tube and the air hole, allows the guide tube to move axially or radially within the air hole along the axle. This enables the guide tube to automatically adjust its coaxiality with the connecting tube, ensuring coaxiality and preventing wear during rotation due to misalignment, thus extending its service life. This utility model's axle inflation connection structure is characterized by its simplicity, long service life, and excellent sealing performance.

[0020] This utility model also provides a vehicle axle, including the vehicle axle inflatable connection structure described in any of the above embodiments. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of the pneumatic connection structure of the axle in an embodiment of this utility model;

[0022] Figure 2 for Figure 1 A magnified view of part A;

[0023] Figure 3 for Figure 2 A partial schematic diagram. Detailed Implementation

[0024] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments:

[0025] like Figures 1 to 3 As shown, this utility model embodiment provides an axle inflation connection structure, which is installed on the axle of a heavy vehicle and includes an axle 1, a wheel hub 2, a connecting pipe 3, an end cap 4, a pipe joint 5, and an adapter 6 located outside the end cap 4.

[0026] A shaft cover 11 is tightly fitted to the inner circumferential wall of the outer end of the inner cavity of the axle 1. A mounting hole penetrating the outer end face of the shaft cover 11 is formed in the middle of the outer end face. The wheel hub 2 is rotatably connected to the outer circumferential wall of the axle 1 via a bearing and is used to mount a tire. The tire's steel rim 21 is equipped with a valve 211, which connects to the tire's inner cavity. A connecting pipe 3 is located inside the inner cavity of the axle 1 and is used to supply air to the tire's inner cavity. The inner end of the connecting pipe 3 mates with the mounting hole, and the inner circumferential wall of the outer end of the connecting pipe 3 is fitted with a bushing 31 and two seals 32. The two seals 32 are located at the inner and outer ends of the bushing 31, respectively, and are made of rubber. An end cover 4 is located on the outer side of the axle 1 and is fixedly mounted on the outer end of the wheel hub 2. A fixing hole 41 penetrating the end cover 4 is formed inward in the middle of the outer end face of the end cover 4, and the end cover 4 has a fixing hole 41 corresponding to the outer end face of the end cover 4, which penetrates the outer end inner wall 55.

[0027] The pipe connector 5 is inserted into the fixing hole 41, and its inner end is threaded with a locking nut 52 located between the end cap 4 and the connecting pipe 3. The pipe connector 5 has an air hole 51 that extends through it from the inside out, forming an air passage. A conduit 53, which communicates with the air hole 51 and the connecting pipe 3, is fitted inside the air hole 51 with a clearance fit. The inner end of the conduit 53 passes inward through the locking nut 52 and is rotatably connected to the connecting pipe 3. The conduit 53 is coaxial with the connecting pipe 3, and its inner end is fitted with the bushing 31 with a clearance fit. The inner end of the conduit 53 is also tightly fitted with the two sealing elements 32 to form a good seal. By setting a clearance fit between the guide tube 53 and the air hole 51, the guide tube 53 can move axially or radially within the air hole 51 along the axle 1. That is, the guide tube 53 and the pipe connector 5 have a small adjustment space, so that the guide tube 53 can automatically adjust its position after being inserted into the connecting pipe 3 and fixed. This allows the guide tube 53 to adjust its coaxiality with the connecting pipe 3, ensuring that the guide tube 53 and the connecting pipe 3 are coaxial, preventing wear of the guide tube 53 during rotation due to misalignment with the connecting pipe 3, thus extending its service life. The structure is also simple.

[0028] The pipe connector 5 includes a positioning pin 59 arranged radially along the axle 1. The positioning pin 59 is located on one of the inner peripheral wall of the air hole 51 and the outer peripheral wall of the conduit 53. The other of the inner peripheral wall of the air hole 51 and the outer peripheral wall of the conduit 53 has an adjustment hole 531 arranged radially along the axle 1. The adjustment hole 531 and the positioning pin 59 are clearance-fitted to realize the coaxiality adjustment of the conduit 53. The specific positions of the positioning pin 59 and the adjustment hole 531 can be selected according to actual needs. In this embodiment, the positioning pin 59 is fixed to the inner peripheral wall of the air hole 51 and extends radially along the axle 1. The outer peripheral wall of the conduit 53 is provided with an adjustment hole 531, so that the conduit 53 can move within the space provided by the adjustment hole 531, thereby realizing the coaxiality adjustment of the conduit 53. Specifically, on opposite sides of the outer peripheral wall of the inner end of the pipe connector 5, a pin hole 58 is respectively provided inward and radially along the axle 1, which communicates with the air hole 51. The two pin holes 58 correspond to each other. On opposite sides of the outer peripheral wall of the outer end of the conduit 53, an adjustment hole is respectively provided inward and radially along the axle 1, which communicates with the inner cavity of the conduit 53. Hole 531, two adjustment holes 531 correspond to each other; the two ends of the positioning pin 59 are respectively tightly engaged with the two pin holes 58 to fix the positioning pin 59 and the adapter 6, and the part between the two ends of the positioning pin 59 is loosely engaged with the adjustment hole 531; of course, in another embodiment, the connection method between the positioning pin 59 and the conduit 53 can also be: the two ends of the positioning pin 59 are respectively loosely engaged with the two pin holes 58, and the part between the two ends of the positioning pin 59 is tightly engaged with the adjustment hole 531. This structure can also realize the coaxiality adjustment of the conduit 53. The specific connection method can be flexibly selected according to actual needs.

[0029] The axle inflation connection structure also includes a sealing ring 532 disposed between the inner peripheral wall of the air hole 51 and the outer peripheral wall of the guide tube 53, and abutting against both. The sealing ring 532 is sleeved on the outer peripheral wall of the guide tube 53 and located outside the adjustment hole 531. Specifically, there are two sealing rings 532, which are respectively located on opposite sides of the positioning pin 59 and are tightly fitted to the inner wall of the air hole 51 and the outer peripheral wall of the guide tube 53, thereby improving the sealing performance.

[0030] Specifically, to improve structural strength, an annular step 50 is formed by protruding outward from the outer peripheral wall of the pipe connector 5. The step 50 mates with the fixing hole 41, and its outer end is located outside the end cap 4. An outer flexible washer 7 is sleeved on the outer end of the step 50 and abuts against the outer end face of the end cap 4 for positioning. An outer flexible washer 7 is sleeved on the outer end of the pipe connector 5, located outside the outer end face of the end cap 4 and abutting against the outer end face of the end cap 4 and the inner end face of the adapter 6. An inner flexible washer 56 is sleeved on the inner end of the pipe connector 5 between the outer end face of the locking nut 52 and the inner wall 55 of the outer end. The inner end and outer end of the inner flexible washer 56 abut against the outer end face and the inner wall 55 of the outer end of the locking nut 52, respectively. The outer flexible washer 7 and the inner flexible washer 56 are elastic and are made of elastic materials such as rubber. The inner end and the outer end of the inner flexible washer 56 abut against the outer end face and the inner wall 55 of the outer end of the locking nut 52, respectively, to achieve the limiting.

[0031] The adapter 6 is located outside the outer flexible washer 7. Specifically, the adapter 6 is located outside the stepped portion 50. It is used to connect the inflation tube 8, which is connected to the air nozzle 211 to inflate the tire. The adapter 6 is threaded to the outer peripheral wall of the pipe joint 5 and communicates with the air hole 51. In this embodiment, the adapter 6 is a three-way connector. When adjusting the installation angle of the pipe interface of adapter 6, adapter 6 rotates so that the pipe interface faces the air nozzle 211. During the rotation, adapter 6 moves axially inward or outward under the elastic force of the flexible washer until the pipe interface is aligned with the air nozzle 211. That is, the flexible washer provides a movable space for adapter 6 in the axial direction, thereby realizing the adjustment of the pipe interface installation angle and ensuring that the pipe interface and the air nozzle 211 are on the same plane. This avoids the need for an excessively long air guide tube due to the pipe connector 5 and the air nozzle 211 not being on the same plane when installing the air guide tube. This also prevents the excessively long air guide tube from affecting its connection sealing due to swaying or shaking, ensuring a good seal between the air guide tube, adapter 6, and air nozzle 211. The structure is simple and easy to install. Similarly, the inner flexible washer 56 provides a variable space in the axial direction for the pipe connector 5 or the locking nut 52.

[0032] In this embodiment, a protective outer gasket 54 is fitted between the inner end face of the adapter 6 and the outer end face of the outer flexible washer 7 in the pipe connector 5. The inner and outer ends of the outer gasket 54 abut against the outer end face of the outer flexible washer 7 and the inner end face of the adapter 6, respectively, to limit the adapter 6. An inner gasket 57 for protection and limitation is fitted between the inner end face of the inner flexible washer 56 and the outer end face of the locking nut 52 in the pipe connector 5. The inner and outer ends of the inner gasket 57 abut against the outer end face of the locking nut 52 and the inner end face of the inner flexible washer 56, respectively, to limit the locking nut 52.

[0033] This utility model's axle inflation connection structure, through a clearance fit between the guide tube and the air hole, allows the guide tube to move axially or radially within the air hole along the axle. This enables the guide tube to automatically adjust its coaxiality with the connecting tube, ensuring coaxiality and preventing wear during rotation due to misalignment, thus extending its service life. This utility model's axle inflation connection structure is characterized by its simplicity, long service life, and excellent sealing performance.

[0034] This utility model embodiment also provides a vehicle axle (not shown), including the vehicle axle inflatable connection structure described in any of the above embodiments.

[0035] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An inflatable axle connection structure, characterized in that, Includes axle, wheel hub, connecting pipe, end cap, pipe joint, and adapter located outside the end cap; The wheel hub is rotatably connected to the outer peripheral wall of the axle via a bearing; The connecting pipe is located inside the axle; The end cap is located on the outside of the axle and is fixedly covered on the outer end of the wheel hub. The outer end of the end cap has a fixing hole that penetrates the end cap. The pipe connector is inserted into the fixing hole and its inner end is threaded with a locking nut located between the end cap and the connecting pipe. The pipe connector has an air hole that passes through it from the inside and outside. A conduit that communicates with the air hole and the connecting pipe is fitted inside the air hole with a clearance fit. The inner end of the conduit passes through the locking nut and is rotatably connected to the connecting pipe. The adapter is threadedly connected to the pipe joint and communicates with the air hole.

2. The axle inflatable connection structure as described in claim 1, characterized in that, The pipe fitting includes a positioning pin arranged radially along the axle. The positioning pin is located on one of the inner peripheral wall of the air hole and the outer peripheral wall of the conduit. An adjustment hole is formed on the other of the inner peripheral wall of the air hole and the outer peripheral wall of the conduit along the radial direction of the axle. The adjustment hole is clearance-fitted with the positioning pin.

3. The axle inflatable connection structure as described in claim 2, characterized in that, The positioning pin is fixed to the inner peripheral wall of the air hole and extends radially along the axle, and the adjustment hole is provided inward on the outer peripheral wall of the guide tube.

4. The axle inflatable connection structure as described in claim 1, characterized in that, The inner end of the pipe connector has two corresponding pin holes on opposite sides of its outer peripheral wall, each extending inward and radially along the axle, and each corresponding adjustment hole on opposite sides of its outer peripheral wall, extending inward and radially along the axle, and each corresponding adjustment hole. The pipe connector includes a positioning pin, with both ends of the positioning pin tightly engaged with the two pin holes, and the portion between the two ends of the positioning pin clearance-fitted with the adjustment hole. Alternatively... The two ends of the positioning pin are respectively clearance-fitted with the two pin holes, and the portion between the two ends of the positioning pin is tightly fitted with the adjustment hole.

5. The axle inflatable connection structure as described in claim 4, characterized in that, It also includes a sealing ring disposed between the inner peripheral wall of the air hole and the outer peripheral wall of the conduit and abutting against both, the sealing ring being sleeved on the outer peripheral wall of the conduit and located outside the adjustment hole.

6. The axle inflatable connection structure as described in claim 5, characterized in that, There are two sealing rings, which are located on opposite sides of the positioning pin and are in close contact with the inner wall of the air hole and the outer peripheral wall of the conduit.

7. The axle inflatable connection structure as described in claim 1, characterized in that, The end cap has an outer inner wall corresponding to the outer end face of the end cap. The outer end of the pipe connector is fitted with an outer flexible washer located outside the outer end face of the end cap and abutting against the outer end face of the end cap and the inner end face of the adapter. The inner end of the pipe connector is fitted with an inner flexible washer between the outer end face of the locking nut and the outer inner wall. The inner end and outer end of the inner flexible washer abut against the outer end face of the locking nut and the outer inner wall, respectively.

8. The axle inflatable connection structure as described in claim 1, characterized in that, The inner wall of the outer end of the axle is tightly fitted with an axle cap, and the outer end face of the axle cap has a mounting hole that penetrates the axle cap from the inside out; the inner end of the connecting pipe is fitted with the mounting hole, and the inner wall of the outer end of the connecting pipe is fitted with a bushing and two seals, the two seals being located at the inner and outer ends of the bushing respectively; the guide tube is coaxial with the connecting pipe and its inner end is clearance-fitted with the bushing, and the inner end of the guide tube is tightly fitted with the two seals.

9. An axle, characterized in that, Includes the axle inflatable connection structure as described in any one of claims 1 to 8.

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