WO2022057009A1

WO2022057009A1 - Axle assembly

Info

Publication number: WO2022057009A1
Application number: PCT/CN2020/123435
Authority: WO
Inventors: 杨合连; 毛雪亮; 平士东; 陈培润
Original assignee: 山东杨嘉汽车制造有限公司
Priority date: 2020-09-19
Filing date: 2020-10-23
Publication date: 2022-03-24
Also published as: CN112046200B; CN112046200A

Abstract

An axle assembly. The axle assembly comprises at least two balance beam assemblies; each balance beam assembly comprises a left balance beam shaft head welding end (2) and a right balance beam shaft head welding end (1) which are respectively provided at the left and right ends thereof, and two middle balance beam vertical plates (3) disposed in parallel; a circular shaft clamping groove (6) is formed in the centers of the balance beam vertical plates (3), and the circular shaft clamping groove (6) is used for clamping and welding a circular shaft (9) of an axle; and shaft heads are respectively provided at the outer ends of the left balance beam shaft head welding end (2) and the right balance beam shaft head welding end (1), and swing arms (101) are connected to the shaft heads. By means of the axle assembly, the flexibility of axles is increased, and the condition that some of the axles are suspended is prevented.

Description

an axle assembly

technical field

The invention relates to the field of trailer manufacturing, in particular to a vehicle axle assembly containing a plurality of vehicle axles.

Background technique

With the development of the national economy, road transportation has become more and more developed, and traction, semi-trailer and container vehicles have entered a period of rapid development, and the corresponding demand for semi-trailer axles will also increase. Choosing an appropriate semi-trailer axle requires consideration of road conditions and the actual vehicle load.

The round shaft of the semi-trailer axle is used to bear the load of the vehicle. Before the automobile is assembled, the corresponding components need to be installed on the round shaft of the axle. In the prior art, since trailers, semi-trailers and other vehicle bodies have a large load, multiple sets of tires need to be installed on the vehicle body, so multiple sets of vehicle axles need to be set up accordingly, and multiple sets of vehicle axles form an axle assembly.

technical problem

However, in the existing vehicle axle assembly, each axle is set independently without cooperation, and when the road is uneven, it is easy to cause some tires to leave the ground and other axles to carry too much load.

technical solutions

In order to solve the deficiencies of the prior art, the present invention proposes a vehicle axle assembly to combine multiple sets of vehicle axles into one body to improve the bearing capacity of the vehicle axle assembly.

The present invention adopts following technical scheme:

A vehicle axle assembly includes at least two balance beam assemblies, and each balance beam assembly includes a left flat cross beam shaft head welding end, a right flat cross beam shaft head welding end, and two parallel arranged in the middle. The balance beam vertical plate; the center of the balance beam vertical plate is provided with a circular shaft clamping groove, and the circular shaft clamping groove is used for clamping the circular shaft of the welded axle; the welding end of the left flat beam shaft head and the right flat beam The outer ends of the welding ends of the beam shaft heads are respectively provided with shaft heads, and the shaft heads are connected with the swing arms.

Preferably, a cross connection cube is provided between the shaft head and the swing arm, the cross connection cube includes a square connection body, and the connection body is provided with a first through hole and a second through hole , the first through hole and the second through hole intersect in a cross shape. The first through hole is provided with a circular first rubber sleeve, the first rubber sleeve divides the second through hole into a left pin slot and a right pin slot, the left pin slot and the The right pin grooves are respectively provided with annular second rubber sleeves, and the second rubber sleeves are rotatably connected with pin shafts, and the two pin shafts extend out of the left pin groove and the right pin groove respectively. . The shaft head is inserted into the first rubber sleeve, and the left pin slot and the right pin slot are respectively inserted into the rotation holes of the swing arm.

Preferably, the front end of the first through hole is provided with a raised ring, the first rubber sleeve extends into the first through hole from the rear end of the first through hole, and the first rubber sleeve is The front end abuts the raised ring.

Further preferably, an oil delivery port is provided at the part where the first rubber sleeve communicates with the left pin groove and/or the right pin groove, and a spiral oil distribution groove is also provided on the inner wall of the first rubber sleeve, so The oil distribution groove extends to the oil delivery port; an oil delivery pipeline is arranged on the pin shaft, and the oil delivery pipeline is communicated with the oil delivery port; a straight-through pressure oil filling cup is arranged at the outer end opening of the oil delivery pipeline , an oil cup cover is arranged on the straight-through pressure oil cup.

Further preferably, U-shaped plates are provided at both ends of the swing arm, and the U-shaped plate includes a bottom plate and two vertical plates, the bottom plate is in the shape of a frame; the two vertical plates are arranged in parallel, and two oppositely distributed. The turning holes are respectively arranged on the two vertical plates; a screw rod is also arranged between the two vertical plates arranged in parallel, and the cross connection cube is clamped into the frame enclosed by the U-shaped plate and the screw rod.

Preferably, a lower cover plate is welded on the bottom end of the vertical plate of the balance beam, and an air chamber support is welded on the lower cover plate, and the air chamber support is used for fixing the air chamber. The axle includes an adjustment arm and a return spring; a fixing ear is provided on the lower cover plate, and two ends of the return spring are respectively connected to the fixing ear and the adjustment arm.

Further preferably, there are two fixing ears, which are respectively arranged on both sides of the lower cover plate and extend to both sides respectively.

Further preferably, a connecting hole is provided on the fixing ear, and the spring is connected to the connecting hole.

Still preferably, the axle round shaft extends out of the round shaft engaging groove, and divides the lower cover plate into a left cover plate segment and a right cover plate segment;

The air chamber support is installed on the left cover plate segment or the right cover plate segment and fits the circular shaft, and the air chamber support is fixed on the left cover plate segment or the right cover plate segment and the circular shaft by welding. on the shaft; the fixing ears are arranged on the right cover plate segment or the left cover plate segment.

Further preferably, a brake bottom plate is symmetrically arranged on both sides of the axle circular axis, and the brake bottom plate is connected with the air chamber.

beneficial effect

1. For the above axle assembly, there is a circular shaft clamping groove in the center of the balance beam vertical plate. The circular shaft clamping groove is used for clamping the circular shaft of the welded axle. When the height of the axle remains unchanged, the balance beam vertical The set height of the board. In the actual product, the height of the round shaft is fixed, the round shaft is clamped into the clamping groove of the circular shaft, and part of it protrudes from the clamping groove of the circular shaft, which will inevitably increase the distance between the bottom of the balance beam assembly and the ground, and improve the installation efficiency. The chassis height of the balance beam welding assembly enables the semi-trailer to adapt to complex road conditions.

2. In the above axle assembly, the left flat cross beam axle head welding end and the right flat cross beam axle head welding end at both ends of the balance beam assembly are respectively provided with axle heads, and the axle heads are connected with swing arms. In the axle assembly, each axle is connected with the swing arm through the balance beam assembly, and the swing arm can swing during operation, which in turn drives the height of each balance beam assembly, and finally improves the flexibility of the axle and prevents some axles. A floating situation occurs.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that are required in the description of the embodiments or the prior art.

Obviously, the accompanying drawings in the following description are only some specific embodiments of the present invention. For those skilled in the art, without creative efforts, other structures can also be obtained according to the structures shown in these drawings. Attached.

FIG. 1 is a front view of the welding assembly of the balance beam in Embodiment 1 of the present utility model.

2 is a top view of the welding assembly of the balance beam in Embodiment 1 of the present utility model.

3 is a front view of a semi-trailer axle to which the balance beam welding assembly is applied in Embodiment 1 of the present utility model.

4 is a side view of a semi-trailer axle to which the balance beam welding assembly is applied in Embodiment 1 of the present utility model.

5 is a top view of a semi-trailer axle to which the balance beam welding assembly is applied in Embodiment 1 of the present utility model.

FIG. 6 is a schematic diagram of the welding of the air chamber support in Embodiment 1 of the present utility model.

FIG. 7 is a partial top plan view of the welding assembly of the balance beam of the axle of the air brake semi-trailer in Embodiment 1 of the present utility model.

8 is a schematic side view of a swing arm for a vehicle axle with a cross-connected cube in Embodiment 1 of the present invention.

9 is a cross-sectional view taken along line A-A of FIG. 1 in Embodiment 1 of the present utility model, and the figure shows a horizontal cross-sectional view of a cross-connected cube in Embodiment 1. FIG.

FIG. 10 is a cross-sectional view taken along the line B-B of FIG. 1 in Embodiment 1 of the present utility model, and the figure shows a vertical cross-sectional view of the cross-connected cube in Embodiment 1. FIG.

11 is a schematic three-dimensional structure diagram of a U-shaped plate in Embodiment 1 of the present invention.

12 is a top view of the U-shaped plate in Embodiment 1 of the present invention.

13 is a schematic three-dimensional structural diagram of a cross-connected cube in Embodiment 1 of the present invention.

标号label	名称name	标号label	名称name
11	右平横梁轴头焊接端Welded end of right flat beam shaft head	103103	十字连接方体cross connected cube
22	左平横梁轴头焊接端Welded end of left flat beam shaft head	104104	螺纹螺栓Threaded Bolts
33	平衡梁立板Balance beam riser	105105	垫圈washer
44	下盖板lower cover	106106	直通式压注油杯Straight-through pressure filling cup
4141	左盖板段left cover section	107107	油杯盖oil cup cover
4242	右盖板段Right cover section	108108	螺杆screw
55	平衡梁加强板Balance beam reinforcement plate	109109	六角螺母Hex nuts
66	圆轴卡接槽Round shaft snap slot	110110	第一通孔first through hole
77	气室支座air chamber support	11011101	第一胶套first rubber sleeve
88	制动底板brake floor	111111	第二通孔second through hole
99	圆轴round shaft	11111111	第二胶套second rubber sleeve
1010	固定耳fixed ear	112112	底板bottom plate
101101	摆臂swing arm	11211121	方孔Square hole
102102	销轴pin	113113	立板Riser

Embodiments of the present invention

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments.

Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relationship between various components under a certain posture (as shown in the accompanying drawings). The relative positional relationship, the movement situation, etc., if the specific posture changes, the directional indication also changes accordingly.

In addition, descriptions such as "first", "second", etc. in the present invention are only for descriptive purposes, and should not be construed as indicating or implying their relative importance or implicitly indicating the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

In the present invention, unless otherwise expressly specified and limited, the terms "connected", "fixed" and the like should be understood in a broad sense, for example, "fixed" may be a fixed connection, a detachable connection, or an integrated; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be an internal communication between two elements or an interaction relationship between the two elements, unless otherwise explicitly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

The specific embodiments of the present invention will be further described in conjunction with accompanying drawings 1 to 13:

Example 1:

This embodiment provides a vehicle axle assembly, the vehicle axle assembly includes at least two balance beam assemblies, each balance beam assembly includes a left flat cross beam shaft head welding end 2 and a right flat cross beam shaft head respectively disposed at the left and right ends The welding end 1 and the two balance beam vertical plates 3 arranged in parallel in the middle; the balance beam vertical plate 3 is provided with a circular shaft clamping groove 6 in the center, and the circular shaft clamping groove 6 is used for clamping the circular shaft of the welding axle. Shaft 9; the outer ends of the left flat beam shaft head welding end 2 and the right flat beam shaft head welding end 1 are respectively provided with shaft heads, and the shaft heads are connected with a swing arm 101.

In the above axle assembly, the circular axle 9 of the axle is clamped in the circular axle clamping groove 6 of the balance beam assembly. When the height of the axle remains unchanged, the setting height of the balance beam vertical plate 3 is changed. In the actual product, the height of the round shaft 9 is fixed, the round shaft 9 is stuck in the round shaft clamping groove 6, and part of the circular shaft clamping groove 6 protrudes, which will inevitably increase the distance between the bottom of the balance beam assembly and the ground. , Increase the height of the chassis installed with the balance beam welding assembly, so that the semi-trailer can adapt to complex road conditions.

In addition, in the above axle assembly, the left flat cross beam axle head welding end 2 and the right flat cross beam axle head welding end 1 at both ends of the balance beam assembly are respectively provided with axle heads, and the axle heads are connected with swing arms 101 . In the axle assembly, each axle is connected to the swing arm 101 through a balance beam assembly, and the swing arm 101 can swing during operation, thereby driving the height of each balance beam assembly, and finally improving the flexibility of the axle and preventing partial The condition of the axle is suspended

Specifically, a cross connection cube 103 is disposed between the shaft head and the swing arm 101 , and the cross connection cube 103 includes a square connection body, and the connection body is provided with a first through hole 110 and a The second through hole 111, the first through hole 110 and the second through hole 111 intersect in a cross shape. The first through hole 110 is provided with a circular first rubber sleeve 1101, the first rubber sleeve 1101 divides the second through hole 111 into a left pin slot and a right pin slot, the left pin The groove and the right pin groove are respectively provided with a second rubber sleeve 1111 in the shape of an annular ring, and a pin shaft 102 is rotatably connected in the second rubber sleeve 1111, and the two pin shafts 102 extend out of the left side respectively. pin slot and the right pin slot. The shaft head is inserted into the first rubber sleeve 1101 , and the left pin slot and the right pin slot are respectively inserted into the rotation holes of the swing arm 101 .

The above-mentioned cross connection cube 103 is used to connect the balance beam assembly and the main body of the swing arm 101. In specific use, the shaft heads at both ends of the balance beam assembly are inserted into the first rubber sleeve 1101, and the two pin shafts 102 are used as rotating shafts. It is rotatably connected to the swing arm 101 for the axle. Compared with the shaft heads at both ends of the balance beam assembly being directly hinged on the swing arm 101, the stress on each part of the shaft head is more uniform, and there is no obvious stress concentration point, which can improve the connection between the balance beam assembly and the swing arm 101. Mechanical strength, improve fatigue strength and mechanical strength. The above-mentioned cross connection cube 103 connects the balance beam assembly and the swing arm 101, the first through hole 110 is provided with a circular first rubber sleeve 1101, and the second through hole 111 is provided with a second rubber sleeve 1111. During the rotation of the shaft head of the balance beam assembly, the shaft head is in contact with the first rubber sleeve 1101, which can avoid friction and wear between the shaft head and the inner wall of the first through hole 110; the relative rotation between the pin shaft 102 and the second through hole 111 When the pin shaft 102 is in contact with the second rubber sleeve 1111 , friction and wear between the pin shaft 102 and the inner wall of the second through hole 111 can be avoided. In addition, when the first rubber sleeve 1101 or the second rubber sleeve 1111 is excessively worn and damaged, it can be maintained by replacing the first rubber sleeve 1101 or the second rubber sleeve 1111 , and the main structure of the cross connection cube 103 does not need to be replaced.

Specifically, in this embodiment, in order to prevent the first rubber sleeve 1101 from detaching from the first through hole 110, a raised ring is provided at the front end of the first through hole 110, and the first rubber sleeve 1101 is removed from the first through hole 110. The rear end of the first through hole 110 extends into the first through hole 110 , and the front end of the first rubber sleeve 1101 abuts against the raised ring. It should be noted that the above-mentioned front end and rear end are only for the convenience of description, and the relative positions are limited and do not specifically indicate the front and rear positions. The front end can be any end of the first through hole 110. When any end is designated as the front end , and the other end is the backend.

Specifically, in order to reduce the frictional resistance of the shaft head in the first rubber sleeve 1101, lubricating oil can also be injected into the first rubber sleeve 1101. An oil delivery port is provided at the part where the pin grooves communicate with each other, and an inner wall of the first rubber sleeve 1101 is also provided with a spiral oil distribution groove, and the oil distribution groove extends to the oil delivery port. In order to input the lubricating oil to the oil delivery port, this embodiment also provides the following solution: an oil delivery pipeline is provided on the pin shaft 102, and the oil delivery pipeline is communicated with the oil delivery port. Wherein, the opening of the outer end of the oil pipeline is provided with a straight-through oil filling cup 106 , and an oil cup cover 107 is arranged on the straight-through oil filling cup 106 .

More specifically, in this embodiment, the above-mentioned swing arm 101 is connected to the cross-connected cube 103 through a U-shaped plate, and there are two U-shaped plates located at two ends of the swing arm 101 respectively. The U-shaped plate includes a bottom plate 112 and two vertical plates 113 , the two vertical plates 113 are arranged in parallel, and two oppositely distributed rotating holes are respectively arranged on the two vertical plates 113 . In specific use, the two pin shafts 102 of the cross connection cube 103 are respectively inserted into the rotating holes on the vertical plate 113 , and the cross connection cube 103 is connected to the vertical plate 113 through the pin shafts 102 . A screw 108 is also arranged between the two vertical plates 113 arranged in parallel, and the cross-connecting cube 103 is inserted into the frame enclosed by the U-shaped plate and the screw 108. The screw 1088 is arranged to limit the The cross connection cube 103 is over-rotated or disengaged.

More specifically, in this embodiment, the bottom plate 112 is in the shape of a frame. It should be noted that the bottom plate 112 is in the shape of a frame, which means that a hole is formed in the middle of the bottom plate 112 , and the hole can be a square hole 1121 . , the weight of the swing arm 101 can be reduced.

Specifically, the bottom end of the balance beam vertical plate 3 is welded with a lower cover plate 4, and an air chamber support 7 is welded on the lower cover plate 4, and the air chamber support 7 is used for fixing the air chamber. The axle includes an adjustment arm and a return spring; a fixing lug 10 is provided on the lower cover plate, and two ends of the return spring are respectively connected to the fixing lug 10 and the adjustment arm. In the above-mentioned axle assembly, a fixing ear 10 is provided on the lower cover plate 4, and the fixing ear 10 is used for fixing one end of the return spring, and the other end of the return spring is connected with the adjusting arm. Compared with directly connecting the two ends of the return spring to the air chamber support 7 and the adjusting arm, the position of the fixing lugs 10 can be adjusted as required, thereby adjusting the length of both ends of the spring and improving the elastic force of the return spring. In addition, the fixing ears 10 are arranged on the lower cover plate 4, and the prefabricated fixing ears 10 only need to be welded on the lower cover plate 4, and the assembly process of the fixing ears 10 is simple. At the same time, the return spring is connected to the fixing lug 10 . Compared with being directly connected to the air chamber support 7 , the return spring has a larger assembly space, is easier to install, and saves the space between the air chamber and the air chamber support 7 . Space.

More specifically, two return springs are arranged on the axle assembly. Therefore, in this embodiment, there are two fixing ears 10, which are respectively arranged on both sides of the lower cover 4, and are respectively Extend to the sides. The above-mentioned fixing ears 10 extend outward, which can keep the fixing ears 10 away from the lower cover plate 4, so that the two return springs are located on both sides of the air chamber support 7, so as to prevent the air chamber support 7 and other components from hindering the assembly of the return spring .

Specifically, in this embodiment, the above-mentioned fixing ears 10 are blocks extending outward from the lower cover plate 4 , and the outer ends thereof can be semicircular to avoid injury to the staff by sharp points. Wherein, the fixing ear 10 is provided with a connecting hole, and the spring is connected to the connecting hole.

Specifically, in the air brake semi-trailer axle provided in this embodiment, in order to increase the height between the air chamber and the ground, the upper cover plate needs to be moved. For this reason, the center of the balance beam vertical plate 3 has a circular shaft clamping groove 6. The circular shaft clamping groove 6 is used for clamping the circular shaft 9 of the welding axle; the lower part of the circular shaft 9 extends out of the circular shaft clamping groove 6, and separates the lower cover 4 into left Cover plate segment 41 and right cover plate segment 42 . In the above arrangement, compared with the balance beam vertical plate 3 and the lower cover plate 4 directly surrounding the circular shaft 9, the position of the circular shaft 9 remains unchanged, and the position of the lower cover plate 4 is moved upward. In this embodiment, the air chamber support 7 is installed on the left cover plate segment 41 or the right cover plate segment 42 , and the fixing ears 10 are arranged on the right cover plate segment 42 or the left cover plate segment 41 superior. The air chamber and the fixing lugs 10 are respectively arranged on the left cover plate segment 41 and the right cover plate segment 42, which can increase the distance between the fixed connection points of the two ends of the return spring and increase the elastic force of the return spring.

Specifically, in this embodiment, in order to improve the installation strength of the air chamber support 7, the air chamber support 7 is installed on the left cover plate segment 41 or the right cover plate segment 42, and fits the circular The shaft 9, the air chamber support 7 is fixed on the left cover plate segment 41 or the right cover plate segment 42 and the round shaft 9 by welding.

Specifically, in the axle of the air brake semi-trailer provided in this embodiment, brake bottom plates 1128 are symmetrically arranged on both sides of the axle 9 , and the brake bottom plates 1128 are connected with the air chamber.

Of course, the above descriptions are only preferred embodiments of the present invention, and the present invention is not limited to the above-mentioned embodiments. , and obvious deformation forms, all fall within the essential scope of this specification, and should be protected by the present invention.

Claims

An axle assembly, characterized in that:

It includes at least two balance beam assemblies, and each balance beam assembly includes a left flat beam shaft head welding end, a right flat beam shaft head welding end and two balance beam vertical plates arranged in parallel at the left and right ends respectively;

The center of the balance beam vertical plate is provided with a circular shaft clamping groove, and the circular shaft clamping groove is used for clamping the circular shaft of the welded axle;

The outer ends of the shaft head welding end of the left flat beam and the shaft head welding end of the right flat beam are respectively provided with shaft heads, and the shaft heads are connected with a swing arm.
The axle assembly of claim 1, wherein:

A cross connection cube is arranged between the shaft head and the swing arm, and the cross connection cube includes a square connection body, and the connection body is provided with a first through hole and a second through hole, the The first through hole and the second through hole are crossed in a cross shape;

The first through hole is provided with a circular first rubber sleeve, the first rubber sleeve divides the second through hole into a left pin slot and a right pin slot, the left pin slot and the The right pin grooves are respectively provided with annular second rubber sleeves, and pin shafts are rotatably connected in the second rubber sleeves, and the two pin shafts extend out of the left pin grooves and the right pin grooves respectively. ;

The shaft head is inserted into the first rubber sleeve, and the left pin slot and the right pin slot are respectively inserted into the rotation holes of the swing arm.
The axle assembly of claim 2, wherein:

The front end of the first through hole is provided with a raised ring, the first rubber sleeve extends into the first through hole from the rear end of the first through hole, and the front end of the first rubber sleeve abuts against the raised ring.
The axle assembly of claim 2, wherein:

An oil delivery port is provided at the part where the first rubber sleeve communicates with the left pin groove and/or the right pin groove, and the inner wall of the first rubber sleeve is also provided with a spiral oil distribution groove, and the oil distribution groove extends to the oil delivery port; an oil delivery pipeline is arranged on the pin shaft, and the oil delivery pipeline communicates with the oil delivery port; a straight-through pressure oil filling cup is provided at the outer end opening of the oil delivery pipeline, and the straight-through An oil cup cover is provided on the oil filling cup.
The axle assembly of claim 2, wherein:

Both ends of the swing arm are provided with U-shaped plates, the U-shaped plates include a bottom plate and two vertical plates, and the bottom plate is in the shape of a frame; the two vertical plates are arranged in parallel, and the two oppositely distributed turning holes are respectively arranged on two risers;

A screw is also arranged between the two vertical plates arranged in parallel, and the cross-connected cube is clamped into the frame enclosed by the U-shaped plate and the screw.
The axle assembly of claim 1, wherein:

A lower cover plate is welded on the bottom end of the vertical plate of the balance beam, and an air chamber support is welded on the lower cover plate, and the air chamber support is used for fixing the air chamber;

The axle includes an adjustment arm and a return spring; a fixing ear is provided on the lower cover plate, and two ends of the return spring are respectively connected to the fixing ear and the adjustment arm.
6. The axle assembly of claim 6, wherein:

There are two fixing ears, which are respectively arranged on both sides of the lower cover plate and extend to both sides respectively.
6. The axle assembly of claim 6, wherein:

A connection hole is provided on the fixing ear, and the spring is connected to the connection hole.
6. The axle assembly of claim 6, wherein:

The axle round shaft extends out of the round shaft clamping groove, and divides the lower cover plate into a left cover plate segment and a right cover plate segment;

The air chamber support is installed on the left cover plate segment or the right cover plate segment, and fits the circular shaft, and the air chamber support is fixed on the left cover plate segment or the right cover plate segment and the circular shaft by welding. on the shaft; the fixing ears are arranged on the right cover plate segment or the left cover plate segment.
6. The axle assembly of claim 6, wherein:

A brake base plate is symmetrically arranged on both sides of the axle circular axis, and the brake base plate is connected with the air chamber.