Tire inflation structure of steering axle and steering axle
By setting a second through hole on the steering bridge and forming an air supply channel with the through holes of the connecting pipe and the hub cap, the problem of inconvenient arrangement of the pipe inflatable structure of the traditional steering bridge is solved, and the stability and maintenance of the tire inflation structure are achieved. Convenience improves the safety and convenience of the vehicle.
Patent Information
- Application Number
- CN202421156351.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-25
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-05-25
AI Technical Summary
The steering bridge of traditional commercial vehicles is not equipped with an automatic tire inflation structure, which will affect the safety of the vehicle when the tire pressure is reduced or the air leakage is leaked. The pipeline layout of the existing tire inflation structure is inconvenient, which is easy to interfere with the axle parts, and increases the Maintenance difficulty.
A tire inflatable structure of a steering bridge is designed, by setting a second through hole inside the steering joint and bringing its interface close to the steering main pin position, the gas transmission channel is formed with the first through hole on the hub cover to avoid The pipeline interferes with the vehicle chassis components to ensure the stability of the inflatable structure and the convenience of maintenance.
The stable operation of the tire inflation structure is achieved, the difficulty of maintenance of the steering bridge is reduced, and the vehicle can be replenished in time when the tire pressure is insufficient, which improves the safety and convenience of use of the vehicle.
Smart Images
Figure CN222329394U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vehicle chassis parts, in particular to a tire inflation structure of a steering axle and a steering axle. Background Art
[0002] Traditional commercial vehicles do not have automatic tire inflation structures on their steering axles. If tire pressure drops or leaks during driving, it will have a significant impact on vehicle safety. To solve this problem, some existing vehicles are usually equipped with tire inflation structures on their steering axles. The tire inflation structures connect the vehicle's air source to the tires. When low tire pressure is detected, gas is introduced from the air source into the tires through the tire inflation structures to keep the tire pressure at a level that allows the tires to work normally.
[0003] However, in the existing tire inflation structure of the steering axle, since the wheel end structure of the steering axle is rotatably connected to the end of the axle, the pipeline in the tire inflation structure that connects the tire with the air source on the vehicle through the pipeline is difficult to be reasonably arranged on the axle, and the pipeline interferes with the shaft head and wheel hub of the axle, making it impossible for the tire inflation structure to work stably. In addition, the pipeline arranged at the rotating part of the steering axle increases the difficulty of maintaining the steering axle. Utility Model Content
[0004] In view of the deficiencies in the prior art, the first object of the utility model is to provide a tire inflation structure for a steering axle, which has high stability and can reduce the difficulty of maintaining the steering axle.
[0005] The second purpose of the utility model is to provide a steering axle.
[0006] In order to achieve the above purpose one, the utility model adopts the following technical solution:
[0007] The tire inflation structure of the steering axle includes an axle, a steering knuckle, a wheel hub and a wheel hub cover, wherein the steering knuckle is rotatably connected to the end of the axle through a steering kingpin, a shaft head is arranged on the steering knuckle, the wheel hub is rotatably connected to the shaft head through a bearing, and the wheel hub cover is connected to the outer end of the wheel hub;
[0008] A connecting tube is arranged between the hub cover and the outer end of the shaft head, the connecting tube is fixedly matched with one of the hub cover and the shaft head, and the connecting tube is rotatably matched with the other of the hub cover and the shaft head. A first through hole is arranged on the hub cover, one end of the first through hole is connected to one end of the connecting tube, and the other end extends to the periphery of the hub cover to communicate with the inner cavity of the tire installed on the wheel hub; a second through hole is arranged on the steering knuckle, one end of the second through hole is connected to the other end of the connecting tube, and the other end extends to the outer peripheral surface of the steering knuckle near the position of the steering kingpin.
[0009] The shaft head is provided with a first recess extending inward from its outer end surface; the hub cover includes a side wall connected to the wheel hub, and an end wall located at the outer end of the side wall, the inner surface of the end wall is provided with a second recess extending outward, the two ends of the connecting pipe are respectively connected to the first recess and the second recess, a first sealing assembly is provided between the connecting pipe and the first recess, and a second sealing assembly is provided between the connecting pipe and the second recess.
[0010] The connecting pipe is fixedly connected to the wheel hub cover so that the connecting pipe and the wheel hub cover are fixedly matched. One end of the connecting pipe is inserted into the first recess and is rotatably matched with the shaft head. The first sealing assembly includes a guide ring and two sealing rings. The guide ring and the two sealing rings are both embedded in the first recess and fixedly matched with the peripheral wall of the first recess. The guide ring and the two sealing rings are both sleeved on one end of the connecting pipe and are rotatably matched with the connecting pipe. The two sealing rings are respectively located on both sides of the guide ring to seal the gap between the connecting pipe and the peripheral wall of the first recess; one end of the second through hole extends to the inner end wall of the first recess to communicate with the connecting pipe.
[0011] One end of the connecting pipe that passes through the second recess is connected to the hub cover through a fixing pin that crosses the connecting pipe.
[0012] The inner surface of the end wall of the hub cover is provided with a boss protruding inwardly, and the second recess extends outwardly from the inner end surface of the boss. The fixing pin is connected to the connecting tube and protrudes from both sides of the connecting tube respectively. The parts of the two ends of the fixing pin protruding from the two sides of the connecting tube are connected to two pin holes arranged oppositely on the boss. The second sealing assembly includes two sealing rings, which are embedded in the gap between the outer peripheral surface of the connecting tube and the peripheral wall of the second recess, and the two sealing rings are respectively located on both sides of the fixing pin.
[0013] The first through hole is arranged on the end wall of the hub cover, and the first through hole extends from the outer end of the second recess to the outer periphery of the hub cover.
[0014] More than two first through holes are arranged on the end wall of the wheel hub cover, and the inner ends of the more than two first through holes are all connected to the outer ends of the second recessed positions. The outer ends of one or two of the first through holes are provided with joints connected to the wheel hub cover, and the joints are connected to the inner cavity chain of the tire installed on the wheel hub through pipelines. The outer ends of the first through holes without joints are covered with plugs fixed to the wheel hub cover in a detachable manner.
[0015] The second through hole includes a first section extending inwardly from the inner end wall of the first recess along the axial direction of the shaft head, and a second section extending obliquely from the inner side end of the first section to the outer peripheral surface of the steering knuckle near the steering kingpin position.
[0016] In order to achieve the above-mentioned second purpose, the utility model adopts the following technical solutions:
[0017] A steering axle comprises the tire inflation structure of the steering axle.
[0018] The beneficial effects of the utility model are:
[0019] In the utility model, the second through hole is connected with the first through hole on the wheel hub cover through a connecting pipe to form an air transmission channel, so that the air source of the vehicle is connected to the tire through the air transmission channel, so that the tire can be inflated through the air source when the tire is deflated. Since the second through hole is arranged inside the steering knuckle, and the interface between the second through hole and the air source is arranged at a position close to the steering kingpin, it is not only convenient to connect the pipeline between the second through hole and the air source, but also the rotation radius of the position where the second through hole is used to connect with the air source around the steering kingpin is small, which can effectively avoid interference between the pipeline and other components on the vehicle chassis, so that the tire inflation structure can work continuously and stably, and the maintenance difficulty of the steering axle is reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is a schematic diagram of the structure of the first embodiment of the utility model;
[0021] Figure 2 for Figure 1 Magnified view at A in the middle;
[0022] Figure 3 This is a schematic diagram of the structure of the second embodiment of the present utility model. DETAILED DESCRIPTION
[0023] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described:
[0024] like Figure 1 , 2As shown, the tire inflation structure of the steering axle of the first embodiment of the utility model comprises an axle 50, a steering knuckle 100, a wheel hub 20, and a wheel hub cover 30, wherein the steering knuckle 100 is connected to the end of the axle 50 through a steering kingpin 51, so that the steering knuckle 100 has the freedom to rotate relative to the axle 50, a shaft head 10 is provided on the steering knuckle 100, the wheel hub 20 is rotatably connected to the shaft head 10 through a bearing, the wheel hub cover 30 is connected to the outer end of the wheel hub 20, and the tire of the vehicle is mounted on the wheel hub 20. A connecting tube 40 is provided between the outer ends of the hub cover 30 and the shaft head 10, wherein the connecting tube 40 is fixedly matched with the hub cover 20 and rotatably matched with the shaft head 10, a first through hole 301 is provided on the hub cover 20, one end of the connecting tube 40 that is matched with the hub cover 20 is communicated with one end of the first through hole 301, the other end of the first through hole 301 extends to the outer periphery of the hub cover 30, and the first through hole 301 is communicated with the inner cavity of the tire mounted on the wheel hub 20; a connecting tube 40 is provided on the steering knuckle 100; A second through hole is provided, one end of which is connected to one end of the connecting pipe 40 and the shaft head 10, and the other end of the second through hole extends to the outer peripheral surface of the steering knuckle 100 near the steering kingpin 51. The second through hole is connected to the air source of the vehicle through a hose or other pipeline structure at the other end of the second through hole. In this way, the second through hole, the connecting pipe, and the first through hole 301 together form an air transmission channel, so that the air source of the vehicle is connected to the inner cavity of the tire, so as to supply air from the air source of the vehicle to the tire.
[0025] In the utility model, the second through hole is connected with the first through hole on the wheel hub cover through a connecting pipe to form an air transmission channel, so that the air source of the vehicle is connected to the tire through the air transmission channel, so that the tire can be inflated through the air source when the tire is deflated. Since the second through hole is arranged inside the steering knuckle, and the interface between the second through hole and the air source is arranged at a position close to the steering kingpin, it is not only convenient to connect the pipeline between the second through hole and the air source, but also the rotation radius of the position where the second through hole is used to connect with the air source around the steering kingpin is small, which can effectively avoid interference between the pipeline and other components on the vehicle chassis, so that the tire inflation structure can work continuously and stably, and the maintenance difficulty of the steering axle is reduced.
[0026] In order to facilitate the connection between the connecting tube 40, the hub cover 30 and the shaft head 10 and the sealing of the matching parts, the utility model is provided with a first recess 13 extending inward from the outer end surface thereof on the shaft head 10; the hub cover 30 includes a side wall and an end wall 31, the side wall is located at the outer periphery of the hub cover 30 and connected to the wheel hub 20, the end wall 31 is located at the outer end of the side wall, after the side wall is connected to the wheel hub 20, the outer end of the wheel hub 20 is sealed by the end wall 31, and a second recess 302 extending outward is provided on the inner surface of the end wall 31, the outer end of the connecting tube 40 is connected to the second recess 302, and the inner end is connected to the first recess In the position 13, after the outer end of the connecting tube 40 is inserted into the second recess 302, the connecting tube 40 is fixed to the end wall 31, that is, the outer end of the connecting tube 40 is fixedly matched with the wheel hub cover 30, and the inner end of the connecting tube 40 is rotatably matched with the shaft head 10 after passing through the first recess 13, and a first sealing component is arranged between the inner end of the connecting tube 40 and the peripheral wall of the first recess 13 to achieve sealing between the connecting tube 40 and the shaft head 10, and a second sealing component is arranged between the outer end of the connecting tube 40 and the peripheral wall of the second recess 302 to achieve sealing between the connecting tube 40 and the wheel hub cover 30.The first sealing assembly includes a guide ring 41 and two sealing rings 42. The guide ring 41 and the two sealing rings 42 are embedded in the first recess 13 and fixedly matched with the peripheral wall of the first recess 13. Specifically, the outer edges of the guide ring 41 and the two sealing rings 42 are interference-fitted with the peripheral wall of the first recess 13. When the inner end of the connecting pipe 40 is inserted into the first recess 13, the connecting pipe 40 is inserted into the guide ring 41 and the two sealing rings 42, so that the inner rings of the guide ring 41 and the two sealing rings 42 are tightly matched with the outer peripheral surface of the connecting pipe 40, and ensure that the connecting pipe 40 and the two sealing rings are tightly fitted. 42 and the guide ring 41 are rotatable, that is, the guide ring 41 and the two sealing rings 42 are filled in the gap between the outer peripheral surface of the connecting tube 40 and the peripheral wall of the first recess 13, so that the two sealing rings 42 are respectively located on both sides of the guide ring 41, thereby sealing the gap between the connecting tube 40 and the first recess 13; one end of the second through hole extends to the inner wall of the first recess 13, so that a closed chamber is formed between the inner end wall of the first recess 13 and the sealing ring 42 close to the inner end wall of the first recess, the inner side end of the connecting tube 40 is connected to the closed chamber, and one end of the second through hole The end is connected to the closed chamber, and then the inner end of the connecting pipe 40 is connected to one end of the second through hole; after the front end of the connecting pipe 40 is passed through the second recessed position 302, it is fixedly connected to the hub cover 30 through a fixing pin 43, and then the front end of the connecting pipe 40 is fixedly matched with the hub cover 30. Specifically, the inner surface of the end wall 31 of the hub cover 30 is provided with an inwardly protruding boss 32, and the second recessed position 302 extends outward from the inner end surface of the boss, the fixing pin 43 crosses the connecting pipe 40, and the two ends of the fixing pin 43 protrude from the two sides of the connecting pipe 40, and two fixing pins 43 are provided on the boss 32. The two pin holes are opposite to each other, and both of them extend from the peripheral wall of the second concave position 302 to the outer peripheral surface of the boss 32, so that the parts of the two ends of the fixing pin 43 protruding from the two sides of the connecting tube 30 are respectively embedded in the two pin holes, and the connecting tube 40 and the boss 32 are fixed together by the fixing pin 43. During assembly, the outer end of the connecting tube 40 can be inserted into the second concave position 302 from the inner end of the second concave position 302, so that the radial hole on the connecting tube 40 is aligned with the pin hole on the boss 32, and the fixing pin 43 is horizontally inserted into the pin hole from the outer side of the boss 32, and the fixing pin 43 passes through the boss 32 and the connecting tube 40. The second sealing assembly includes two sealing rings 44, which are embedded in the gap between the outer peripheral surface of the connecting tube 40 and the peripheral wall of the second concave position 302 to seal the gap between the connecting tube 40 and the second concave position 302. At the same time, the two sealing rings 44 are respectively located on both sides of the fixing pin 43 to prevent air leakage in the matching gap between the connecting tube 40 and the fixing pin 43.
[0027] In the utility model, the first through hole 301 is arranged on the end wall 31 of the wheel hub 30, and the first through hole 301 extends from the outer end of the second recess 302 to the outer periphery of the wheel hub cover 30. The first through hole 301 is arranged on the end wall 31, and the thickness of the end wall 31 needs to be set accordingly to meet the requirement of setting the first through hole 301 on the end wall 31. Two first through holes 301 may be provided on the wheel hub cover 30, the inner ends of the two first through holes 301 are connected to the outer ends of the second recessed positions 302, the outer end of one of the first through holes 301 is provided with a connector 33 connected to the wheel hub cover 30, the connector 33 is connected to the inner cavity of the tire on the wheel hub 20 through a pipeline, and the outer end of the other first through hole 301 is provided with a plug 34 connected to the wheel hub cover 30, the plug 34 and the wheel hub cover 30 are detachably matched, for example, the plug 34 may be fixed to the wheel hub cover 30 by threads, when it is suitable for a vehicle with one tire installed on the wheel hub, the connector 33 may be connected to the pipeline to inflate the inner cavity of the tire, when two tires are arranged on the wheel hub, the plug 34 is removed and the connector 33 is installed, so that the two first through holes 301 are respectively inflated into the inner cavities of the two tires.
[0028] The second through hole comprises a first section 12 and a second section 11, wherein the first section 12 extends inwardly from the inner end wall of the first recess 13 along the axial direction of the shaft head 10, and the second section 11 extends obliquely from the inner side end of the first section 12 to the position of the outer peripheral surface of the steering knuckle 100 close to the steering kingpin 51. The second through hole is set as a two-section structure, so that the second through hole can be machined on the steering knuckle 100 and the shaft head 10.
[0029] Figure 3 The tire inflation structure of the steering axle of the second embodiment of the utility model is shown. Different from the first embodiment, the second embodiment fixes the inner end of the connecting pipe to the shaft head, so that the outer end of the connecting pipe and the hub cover can be rotatably matched, the inner end of the connecting pipe and the shaft head are fixed together by a fixing pin, the second sealing component is arranged between the connecting pipe and the shaft head, and the first sealing component is arranged between the connecting pipe and the hub cover. The other structures of the second embodiment are the same as those of the first embodiment, and will not be repeated here.
[0030] The steering axle of the utility model comprises the tire inflation structure of the steering axle mentioned above, and other structures of the steering axle are the same as those in the prior art and will not be described in detail here.
[0031] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.
Claims
1. The tire inflation structure of the steering axle is characterized by: It includes an axle, a steering knuckle, a wheel hub and a wheel hub cover, wherein the steering knuckle is rotatably connected to the end of the axle through a steering kingpin, a shaft head is arranged on the steering knuckle, the wheel hub is rotatably connected to the shaft head through a bearing, and the wheel hub cover is connected to the outer end of the wheel hub; A connecting tube is arranged between the hub cover and the outer end of the shaft head, the connecting tube is fixedly matched with one of the hub cover and the shaft head, and the connecting tube is rotatably matched with the other of the hub cover and the shaft head. A first through hole is arranged on the hub cover, one end of the first through hole is connected to one end of the connecting tube, and the other end extends to the periphery of the hub cover to communicate with the inner cavity of the tire installed on the wheel hub; a second through hole is arranged on the steering knuckle, one end of the second through hole is connected to the other end of the connecting tube, and the other end extends to the outer peripheral surface of the steering knuckle near the position of the steering kingpin.
2. The tire inflation structure of the steering axle according to claim 1, characterized in that: The shaft head is provided with a first recess extending inward from its outer end surface; the hub cover includes a side wall connected to the wheel hub, and an end wall located at the outer end of the side wall, the inner surface of the end wall is provided with a second recess extending outward, the two ends of the connecting pipe are respectively connected to the first recess and the second recess, a first sealing assembly is provided between the connecting pipe and the first recess, and a second sealing assembly is provided between the connecting pipe and the second recess.
3. The tire inflation structure of the steering axle according to claim 2, characterized in that: The connecting pipe is fixedly connected to the wheel hub cover so that the connecting pipe and the wheel hub cover are fixedly matched. One end of the connecting pipe is inserted into the first recess and is rotatably matched with the shaft head. The first sealing assembly includes a guide ring and two sealing rings. The guide ring and the two sealing rings are both embedded in the first recess and fixedly matched with the peripheral wall of the first recess. The guide ring and the two sealing rings are both sleeved on one end of the connecting pipe and are rotatably matched with the connecting pipe. The two sealing rings are respectively located on both sides of the guide ring to seal the gap between the connecting pipe and the peripheral wall of the first recess; one end of the second through hole extends to the inner end wall of the first recess to communicate with the connecting pipe.
4. The tire inflation structure of the steering axle according to claim 3, characterized in that: One end of the connecting pipe that passes through the second recess is connected to the hub cover through a fixing pin that crosses the connecting pipe.
5. The tire inflation structure of the steering axle according to claim 4, characterized in that: The inner surface of the end wall of the hub cover is provided with a boss protruding inwardly, and the second recess extends outwardly from the inner end surface of the boss. The fixing pin is connected to the connecting tube and protrudes from both sides of the connecting tube respectively. The parts of the two ends of the fixing pin protruding from the two sides of the connecting tube are connected to two pin holes arranged oppositely on the boss. The second sealing assembly includes two sealing rings, which are embedded in the gap between the outer peripheral surface of the connecting tube and the peripheral wall of the second recess, and the two sealing rings are respectively located on both sides of the fixing pin.
6. The tire inflation structure of the steering axle according to claim 5, characterized in that: The first through hole is arranged on the end wall of the hub cover, and the first through hole extends from the outer end of the second recess to the outer periphery of the hub cover.
7. The tire inflation structure of the steering axle according to claim 6, characterized in that: More than two first through holes are arranged on the end wall of the wheel hub cover, and the inner ends of the more than two first through holes are all connected to the outer ends of the second recessed positions. The outer ends of one or two of the first through holes are provided with joints connected to the wheel hub cover, and the joints are connected to the inner cavity chain of the tire installed on the wheel hub through pipelines. The outer ends of the first through holes without joints are covered with plugs fixed to the wheel hub cover in a detachable manner.
8. The tire inflation structure of the steering axle according to claim 3, characterized in that: The second through hole includes a first section extending inwardly from the inner end wall of the first recess along the axial direction of the shaft head, and a second section extending obliquely from the inner side end of the first section to the outer peripheral surface of the steering knuckle near the steering kingpin position.
9. Steering axle, characterized in that: A tire inflation structure for a steering axle comprising the tire inflation structure of any one of claims 1 to 8.