Axle inflation structure and axle

Abstract

The utility model discloses an axle inflation structure and an axle. The axle inflation structure comprises a shaft head, a hub, an air outlet assembly and an air inlet assembly. A flange of the hub is provided with an air conveying channel, and the air conveying channel forms an air outlet and an annular air inlet in the outer end face and the inner end face of the flange respectively. The inner end of the air outlet assembly is matched with the air outlet and communicated with the air conveying channel, and the outer end of the air outlet assembly is communicated to an air tap of the tire. The air inlet assembly is matched with the air inlet and communicated with the air conveying channel, the air inlet assembly comprises a fixing support fixedly connected with the shaft head, the fixing support is provided with an air inlet channel communicated with the air inlet, the inner end of the air inlet channel is connected with an air inlet pipe used for being communicated with a whole vehicle air pressure system, and an installation gap is formed between the fixing support and the flange. And a sealing ring is arranged in the mounting gap. By means of the structural design, the tire can be inflated through a whole vehicle air pressure system, automatic inflation is achieved, inflation at a designated place is not needed, and therefore tire inflation is convenient and flexible.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile accessories, in particular to an axle inflation structure and an axle. Background Art

[0002] The front steering drive axle assembly of the existing grabber includes an axle head, an axle installed in the axle head, a wheel hub rotatably connected to the axle head, a brake drum fixed to the wheel hub flange, and a steel ring fixedly connected to the brake drum. A tire is provided on the steel ring, and an air nozzle is provided on the tire. The air nozzle is used to connect an external inflation device. When the tire is inflated, the air supply pipe of the external inflation device is connected to the air nozzle to deliver air into the tire. When the tire is filled with air, the air supply pipe is removed. However, the above tire needs to be inflated at a designated location, which makes inflation inconvenient. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the utility model is to provide an axle inflation structure and an axle which are easy to inflate and have good sealing performance.

[0004] To achieve the above purpose, the embodiment of the utility model adopts the following technical solutions:

[0005] The axle inflation structure includes an axle head, a wheel hub, an air outlet component and an air inlet component;

[0006] The wheel hub is rotatably connected to the shaft head and has a flange, wherein the flange has an outer end face and an inner end face located inside the outer end face, and an air delivery passage is provided on the flange, wherein an air outlet and an annular air inlet are formed on the outer end face and the inner end face of the flange respectively;

[0007] The inner end of the air outlet assembly cooperates with the air outlet and is connected to the air delivery passage, and the outer end of the air outlet assembly is connected to the air nozzle of the tire;

[0008] The air intake assembly cooperates with the air inlet and is connected with the air delivery duct. The air intake assembly includes a fixed bracket arranged at the inner end of the air inlet and fixedly connected to the shaft head. The fixed bracket is provided with an air inlet connected with the air inlet. The inner end of the air inlet is connected with an air intake pipe for connecting with the air pressure system of the whole vehicle. An installation gap is formed between the fixed bracket and the flange, and a sealing ring is provided in the installation gap.

[0009] Furthermore, the fixing bracket is annular and covers the inner end of the air inlet, and an annular convex portion protrudes from the inner end surface of the fixing bracket, and the convex portion extends into the inner end of the air inlet, and the sealing ring is arranged in the installation gap formed between the inner circumferential wall of the air inlet and the outer circumferential wall of the convex portion and contacts the inner circumferential wall of the air inlet and the outer circumferential wall of the convex portion.

[0010] Furthermore, a movable ring is gap-fitted in the installation gap, and the movable ring is located outside the sealing ring and the two are in close contact to squeeze the sealing ring inward.

[0011] Furthermore, a pre-tightening ring located outside the movable ring is fixed in the air inlet, the pre-tightening ring is provided with an air hole corresponding to the air inlet and connected to the air inlet, and a protrusion protrudes inwardly from its inner end surface, and the protrusion contacts the outer end surface of the movable ring.

[0012] Furthermore, the inner circumferential wall and the outer circumferential wall of the protrusion respectively form an installation gap with the inner circumferential wall of the corresponding air inlet, each of the installation gaps is fitted with a sealing ring, and each of the installation gaps is also gap-fitted with a movable ring, the movable ring is located on the outside of the sealing ring and the two are in close contact to squeeze the sealing ring inward.

[0013] Furthermore, the inner end surface of the flange is outwardly recessed along its circumference to form an annular mounting groove, a movable bottom plate is fitted in the mounting groove, the movable bottom plate is fixedly connected to the flange, and the air delivery duct forms an air inlet on the movable bottom plate.

[0014] Furthermore, the inner end surface of the fixing bracket protrudes inwardly to form a convex column, and the inner end surface of the convex column is provided with an air inlet passage penetrating the fixing bracket outwardly.

[0015] Furthermore, the inner end surface of the fixing bracket also protrudes inward to form a fixing plate, and the inner end of the fixing plate is bent and extended toward the shaft head to form a connecting plate, and the connecting plate is fixedly connected to the shaft head.

[0016] Furthermore, the air outlet assembly includes a pipe joint and an air outlet pipe, the inner end of the pipe joint cooperates with the air outlet, one end of the air outlet pipe is connected to the outer end of the pipe joint, and the other end is connected to the air nozzle.

[0017] The axle inflation structure of the utility model is provided with an air delivery channel on the flange, and an air outlet assembly and an air inlet assembly are provided which are respectively matched with the air outlet and the air inlet of the air delivery channel, the air outlet assembly is connected to the air nozzle of the tire, the air inlet assembly includes a fixed bracket which is provided at the inner end of the air inlet and fixedly connected to the shaft head, the fixed bracket is provided with an air inlet channel which is connected with the air inlet, the inner end of the air inlet channel is connected with an air inlet pipe which is used to connect with the air pressure system of the whole vehicle, when the tire is inflated, the air pressure system of the whole vehicle transmits gas to the air inlet channel through the air inlet pipe, and the gas in the air inlet channel is sequentially transmitted to the tire through the air delivery channel, the air outlet assembly and the air nozzle, that is, the tire is inflated by using the air pressure system of the whole vehicle, which not only realizes automatic inflation, but also does not need to be inflated at a designated location, thereby making the tire inflation convenient and flexible. In addition, a sealing ring is provided in the installation gap formed between the fixed bracket and the flange, and the sealing ring can prevent the gas in the air delivery channel from leaking out, ensuring that the air delivery channel has good sealing performance.

[0018] An embodiment of the utility model further provides a vehicle axle, comprising the vehicle axle inflation structure described in any of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a cross-sectional view of the axle inflation structure of the utility model embodiment;

[0020] Figure 2 for Figure 1 A magnified view of the local area A;

[0021] Figure 3 for Figure 1 A partial three-dimensional schematic diagram of an air intake assembly;

[0022] Figure 4 for Figure 3 Schematic diagram of the three-dimensional decomposition. DETAILED DESCRIPTION

[0023] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described:

[0024] like Figures 1 to 4 As shown, an embodiment of the utility model provides an axle inflation structure, which is installed on the front steering drive axle of a grabber, and includes an axle head 1, a wheel hub 2, a reducer housing 5, a brake drum 6, an air outlet component 3 and an air intake component 4.

[0025] like Figure 1 , Figure 2As shown, the wheel hub 2 is rotatably connected to the shaft head 1 through a bearing and has a flange 21. The flange 21 has an outer end face 211 and an inner end face 212 located inside the outer end face 211. The flange 21 is provided with an air delivery channel 20. The air delivery channel 20 forms an air outlet 201 and an annular air inlet 202 on the outer end face 211 and the inner end face 212 of the flange 21, respectively. Specifically, the air outlet 201 and the air inlet 202 are respectively opened along the axial direction of the wheel hub 2. The air delivery channel 20 includes a conveying section located between the air outlet 201 and the air inlet 202. The conveying section is opened along the radial direction of the flange 21 and is connected with the air outlet 201 and the air inlet 202. The inner end of the reducer housing 5 and the outer end of the brake drum 6 correspond to the air outlet 201 respectively and a through hole 7 is opened along the axial direction of the wheel hub 2. The through holes 7 on the reducer housing 5 and the brake drum 6 are coaxial with the air outlet 201. More specifically, the inner end surface 212 of the flange 21 is outwardly and concavely formed along its circumference to form an annular mounting groove 22, and a movable bottom plate 23 is fitted in the mounting groove 22. The movable bottom plate 23 is fixedly connected to the flange 21 by screws so as to rotate synchronously with the wheel hub 2. The air delivery channel 20 forms an air inlet 202 (such as Figure 2 , Figure 4 as shown).

[0026] like Figure 1 , Figure 2 As shown, the inner end of the air outlet assembly 3 cooperates with the air outlet 201 and is connected to the air delivery channel 20, and the outer end of the air outlet assembly 3 is connected to the air nozzle of the tire (not shown). Specifically, the air outlet assembly 3 includes a pipe joint 31 and an air outlet pipe 32, the inner end of the pipe joint 31 passes through the through hole 7 of the brake drum 6 and the through hole 7 of the reducer in sequence and cooperates with the air outlet 201, one end of the air outlet pipe 32 is connected to the outer end of the pipe joint 31, and the other end is connected to the air nozzle to inflate the tire.

[0027] like Figure 2 , Figure 3As shown, the air intake assembly 4 cooperates with the air intake port 202 and is connected to the air delivery passage 20. The air intake assembly 4 includes a fixed bracket 41 arranged at the inner end of the air intake port 202 and fixedly connected to the shaft head 1. Specifically, the inner end surface of the fixed bracket 41 protrudes inward to form a fixed plate 414. Specifically, the fixed plate 414 and the fixed bracket 411 are fixed by welding. Of course, the two can also adopt an integrated structure; the inner end of the fixed plate 414 is bent and extended toward the shaft head 1 to form a connecting plate 415. The connecting plate 415 is fixedly connected to the shaft head 1 by screws. The structure of this fixed bracket 41 is simple and easy to process. The fixed bracket 41 is provided with an air inlet 411 connected with the air inlet port 202. The inner end of the air inlet 411 is connected with an air inlet pipe 42 for connecting with the air pressure system of the whole vehicle. An installation gap is formed between the fixed bracket 41 and the flange 21. A sealing ring 43 is provided in the installation gap. The sealing ring 43 can prevent the gas in the air delivery channel 20 from leaking out, ensuring that the air delivery channel 20 has good sealing performance. When the tire is inflated, the air pressure system of the whole vehicle delivers gas to the air inlet 411 through the air inlet pipe 42. The gas in the air inlet 411 is sequentially delivered to the tire through the air delivery channel 20, the air outlet assembly 3, and the air nozzle. That is, the tire is inflated by using the air pressure system of the whole vehicle, which not only realizes automatic inflation, but also does not need to be inflated at a designated location, making tire inflation convenient and flexible.

[0028] like Figure 2 , Figure 3 As shown, specifically, the fixed bracket 41 is annular and covers the inner end of the air inlet 202, and an annular convex portion 412 protrudes from the inner end surface of the fixed bracket 41, and the convex portion 412 extends into the inner end of the air inlet 202; in order to enhance the structural strength, in the present embodiment, the inner end surface of the fixed bracket 41 protrudes inward to form a convex column 413, and the convex column 413 corresponds to the convex portion 412, and the inner end surface of the convex column 413 is provided with an air inlet 411 penetrating the fixed bracket 41 outward, and the air inlet 411 penetrates the convex portion 412 outwardly along the axial direction of the axle 100 to communicate with the air inlet 202; the sealing ring 43 is arranged in the installation gap formed between the inner circumferential wall of the air inlet 202 and the outer circumferential wall of the convex portion 412 and contacts with the inner circumferential wall of the air inlet 202 and the outer circumferential wall of the convex portion 412 to form a sealing structure.

[0029] like Figure 2 , Figure 3 As shown, in order to further improve the sealing performance, a movable ring 44 is also provided in the installation gap. The movable ring 44 is located outside the sealing ring 43 and the two are in close contact to squeeze the sealing ring 43 inward. The movable ring 44 is made of polytetrafluoroethylene material, so that the movable ring 44 has the characteristics of high strength, high wear resistance, low friction coefficient, long service life and no lubrication. On the one hand, the sealing performance is ensured, and on the other hand, there is no need to inject grease during the entire life cycle. Figure 2 , Figure 4As shown, in the present embodiment, the inner circumferential wall and the outer circumferential wall of the convex portion 412 respectively form an installation gap with the inner circumferential wall of the corresponding air inlet 202, and a sealing ring 43 is fitted in each installation gap, and each installation gap is also gap-fitted with a movable ring 44, the movable ring 44 is located on the outside of the sealing ring 43 and the two are in close contact to squeeze the sealing ring 43 inward, and grease can also be pre-stored between the movable ring 44 and the sealing ring 43, so that grease injection is unnecessary during the entire life cycle. When the tire is inflated, the two movable rings 44 slide inward along the convex portion 412 under the action of the gas pressure in the air delivery channel 20 to squeeze the two sealing rings 43 inward, so that the two sealing rings 43 are in close contact with the inner circumferential wall of the air inlet 202, the outer circumferential wall of the convex portion 412 and the outer end face of the fixed bracket 41, so that the air delivery channel 20 is well sealed.

[0030] like Figure 1 , Figure 2 As shown, in order to further improve the sealing performance, a pre-tightening ring 45 located on the outside of the movable ring 44 is fixed by screws in the air inlet 202. The pre-tightening ring 45 is provided with an air hole 451 corresponding to the air inlet 411 and connected to the air inlet 411, and a bump (not shown) protrudes inward from its inner end surface. The bump contacts the outer end surface of the movable ring 44 to provide a pre-tightening force to the sealing ring 43 through the movable ring 44, so that the sealing ring 43 is in close contact with the inner circumferential wall of the air inlet 202 and the outer circumferential wall of the convex portion 412 to prevent gas leakage, thereby further achieving good sealing.

[0031] The axle inflation structure of the utility model is provided with an air delivery channel on the flange, and an air outlet assembly and an air inlet assembly are provided which are respectively matched with the air outlet and the air inlet of the air delivery channel, the air outlet assembly is connected to the air nozzle of the tire, the air inlet assembly includes a fixed bracket which is provided at the inner end of the air inlet and fixedly connected to the shaft head, the fixed bracket is provided with an air inlet channel which is connected with the air inlet, the inner end of the air inlet channel is connected with an air inlet pipe which is used to connect with the air pressure system of the whole vehicle, when the tire is inflated, the air pressure system of the whole vehicle transmits gas to the air inlet channel through the air inlet pipe, and the gas in the air inlet channel is sequentially transmitted to the tire through the air delivery channel, the air outlet assembly and the air nozzle, that is, the tire is inflated by using the air pressure system of the whole vehicle, which not only realizes automatic inflation, but also does not need to be inflated at a designated location, thereby making the tire inflation convenient and flexible. In addition, a sealing ring is provided in the installation gap formed between the fixed bracket and the flange, and the sealing ring can prevent the gas in the air delivery channel from leaking out, ensuring that the air delivery channel has good sealing performance.

[0032] The embodiment of the utility model further provides a vehicle axle 100, comprising the vehicle axle inflation structure described in any of the above embodiments.

[0033] 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. Axle inflatable structure, characterized in that: It includes a shaft head, a wheel hub, an air outlet assembly and an air intake assembly; The wheel hub is rotatably connected to the shaft head and has a flange, wherein the flange has an outer end face and an inner end face located inside the outer end face, and an air delivery passage is provided on the flange, wherein an air outlet and an annular air inlet are formed on the outer end face and the inner end face of the flange respectively; The inner end of the air outlet assembly cooperates with the air outlet and is connected to the air delivery passage, and the outer end of the air outlet assembly is connected to the air nozzle of the tire; The air intake assembly cooperates with the air inlet and is connected with the air delivery duct. The air intake assembly includes a fixed bracket arranged at the inner end of the air inlet and fixedly connected to the shaft head. The fixed bracket is provided with an air inlet connected with the air inlet. The inner end of the air inlet is connected with an air intake pipe for connecting with the air pressure system of the whole vehicle. An installation gap is formed between the fixed bracket and the flange, and a sealing ring is provided in the installation gap.

2. The axle inflation structure according to claim 1, characterized in that: The fixing bracket is annular and covers the inner end of the air inlet. An annular convex portion protrudes from the inner end surface of the fixing bracket, and the convex portion extends into the inner end of the air inlet. The sealing ring is arranged in the installation gap formed between the inner circumferential wall of the air inlet and the outer circumferential wall of the convex portion and contacts the inner circumferential wall of the air inlet and the outer circumferential wall of the convex portion.

3. The axle inflation structure according to claim 2, characterized in that: A movable ring is also gap-matched in the installation gap. The movable ring is located on the outside of the sealing ring and the two are in close contact to squeeze the sealing ring inward.

4. The axle inflation structure according to claim 3, characterized in that: A pre-tightening ring located outside the movable ring is also fixed in the air inlet. The pre-tightening ring is provided with an air hole corresponding to the air inlet and connected to the air inlet, and a convex block protrudes inwardly from its inner end surface, and the convex block contacts the outer end surface of the movable ring.

5. The axle inflation structure according to claim 2, characterized in that: The inner circumferential wall and the outer circumferential wall of the protrusion respectively form an installation gap with the inner circumferential wall of the corresponding air inlet, each of the installation gaps is fitted with a sealing ring, and each of the installation gaps is also gap-fitted with a movable ring, the movable ring is located on the outside of the sealing ring and the two are in close contact to squeeze the sealing ring inward.

6. The axle inflation structure according to claim 1, characterized in that: The inner end surface of the flange faces outward and is recessed along its circumference to form an annular mounting groove, a movable bottom plate is fitted in the mounting groove, the movable bottom plate is fixedly connected to the flange, and the air delivery channel forms an air inlet on the movable bottom plate.

7. The axle inflation structure according to claim 1, characterized in that: The inner end surface of the fixing bracket protrudes inward to form a convex column, and the inner end surface of the convex column is outwardly provided with the air inlet passage penetrating the fixing bracket.

8. The axle inflation structure according to claim 1, characterized in that: The inner end surface of the fixing bracket further protrudes inward to form a fixing plate, and the inner end of the fixing plate is bent and extended toward the shaft head to form a connecting plate, and the connecting plate is fixedly connected to the shaft head.

9. The axle inflation structure according to claim 1, characterized in that: The air outlet assembly includes a pipe joint and an air outlet pipe, the inner end of the pipe joint cooperates with the air outlet, one end of the air outlet pipe is connected to the outer end of the pipe joint, and the other end is connected to the air nozzle.

10. A vehicle axle, characterized in that: The invention comprises the axle inflation structure as claimed in any one of claims 1 to 9.

Images