Connection structure of air suspension axle tube and guide arm and air suspension
By introducing limiting protrusions and positioning grooves into the connection structure between the air suspension shaft tube and the guide arm, the problems of complex assembly and loose nuts in the existing technology are solved, achieving the effects of simplified assembly and improved safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG FUWA HEAVY IND
- Filing Date
- 2025-05-24
- Publication Date
- 2026-05-29
AI Technical Summary
In the existing technology, the connection structure between the air suspension axle tube and the guide arm is complex, making it difficult to align the bolt holes, which leads to assembly difficulties, easy loosening of nuts, and affects vehicle driving safety.
The structure of limiting protrusions and positioning grooves ensures the coaxiality of the shank of the U-bolt with the through hole, and a stable connection is achieved by tightening the nut, which simplifies the assembly process and prevents the nut from loosening.
It improves the ease of air suspension assembly and vehicle driving safety, prevents nuts from loosening, and ensures normal vehicle operation.
Smart Images
Figure CN224296952U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of air suspension technology, specifically to a connection structure between an air suspension shaft tube and a guide arm, and an air suspension system. Background Technology
[0002] Air suspension typically includes a bracket, guide arms, air springs, and axle tubes. The bracket is fixed to the vehicle frame. One end of the guide arm is pivotally connected to the bracket so that the guide arm can swing up and down relative to the vehicle frame. The air spring is connected between the other end of the guide arm and the vehicle frame. The axle tube is perpendicular to the guide arm and connected to the guide arm. When the guide arm swings up and down relative to the vehicle frame, it can drive the wheel mounted on the end of the axle tube to move up and down relative to the vehicle frame, thereby enabling the air suspension to achieve the purpose of shock absorption. In existing technology, the shaft tube and guide arm are generally connected together using a shaft seat, U-bolt, and pressure plate. Specifically, the shaft seat is placed between the shaft tube and the guide arm, the pressure plate is placed above the guide arm, and the bent part of the U-bolt is placed below the shaft tube, allowing the shank of the U-bolt to extend upwards and pass through the pressure plate. A nut is screwed onto the shank of the U-bolt above the pressure plate. Tightening the nut pulls the U-bolt tight and presses it against the pressure plate, thus fixing the shaft tube and guide arm together. In actual assembly, it is difficult for the U-bolt to align with the bolt holes on the pressure plate, requiring a special positioning device for positioning by the pressure plate and shaft seat, making the assembly process complex. In addition, because the pressure plate and shaft seat will offset axially in the shaft tube, it is difficult for the shank of the U-bolt to maintain a high degree of coaxiality with the bolt holes on the pressure plate, and the nut is difficult to properly engage with the threads on the U-bolt. Vibrations generated during vehicle operation can easily cause the nut to loosen, thus affecting the normal operation of the vehicle and even creating safety hazards. Utility Model Content
[0003] To address the shortcomings of existing technologies, the purpose of this utility model is to propose a connection structure between the air suspension axle tube and the guide arm, which facilitates the assembly of the axle tube and the guide arm, ensures the vehicle can drive normally, and improves safety.
[0004] The second objective of this utility model is to propose an air suspension system.
[0005] To achieve the first objective mentioned above, this utility model adopts the following technical solution:
[0006] The connection structure between the air suspension axle tube and the guide arm includes the guide arm, axle tube, two U-bolts, axle seat, and pressure plate;
[0007] The guide arm is located above the shaft tube, and the shaft seat is placed between the guide arm and the shaft tube. The shaft seat has upwardly protruding limiting protrusions on both sides, and the limiting protrusions on both sides of the shaft seat are located on both sides of the guide arm. The pressure plate is pressed on the upper surface of the guide arm, and the pressure plate has downwardly extending bosses on both sides, and the bosses on both sides of the pressure plate are located on both sides of the guide arm. The bottom of the bosses has upwardly recessed positioning grooves. On the same side of the guide arm, the limiting protrusions are embedded in the positioning grooves of the bosses.
[0008] Two U-bolts are located on both sides of the guide arm. The bent part of the U-bolt is placed below the shaft tube, and the two rods extend upward and pass through the through hole on the boss. The rods of the U-bolt are screwed with nuts that are pressed against the top of the boss.
[0009] The inner side of the positioning groove extends to the inner side of the boss, and the limiting protrusion is limited between the outer side of the positioning groove and the side of the guide arm.
[0010] Two limiting protrusions are provided on both sides of the bearing seat, offset along the length of the guide arm. Two bosses are provided on both sides of the pressure plate, offset along the length of the guide arm. On the same side of the guide arm, the two limiting protrusions are respectively embedded in the positioning grooves of the two bosses.
[0011] The boss has a recessed part that is recessed downward from its top to accommodate a nut, and a through hole extends downward from the bottom of the recess to the bottom of the boss.
[0012] The outer surface of the limiting protrusion is provided with a relief groove that is recessed into the inner side of the limiting protrusion, and the shank of the U-bolt is accommodated in the relief groove.
[0013] A positioning hole is provided in the middle of the pressure plate, and an upper pad is clamped between the pressure plate and the upper surface of the guide arm. The upper pad has a positioning protrusion that protrudes upward and is embedded in the positioning hole in the middle.
[0014] A pad is provided between the bearing seat and the lower surface of the guide arm.
[0015] The lower surface of the guide arm is provided with an upper positioning groove, the shaft seat is provided with a lower positioning groove, and a positioning post passing through the lower pad is provided between the guide arm and the shaft seat. Part of the positioning post is embedded in the upper positioning groove and the other part is embedded in the lower positioning groove.
[0016] The cross-section of the shaft tube is circular. At both ends of the bottom of the shaft seat, there are baffles on both sides of the shaft tube. The two baffles and the bottom surface of the shaft seat together form an arc-shaped mating surface that fits against the surface of the shaft tube. At least one baffle is welded and fixed to the surface of the shaft tube.
[0017] To achieve the second objective mentioned above, this utility model adopts the following technical solution:
[0018] Air suspension, including the connection structure between the air suspension axle tube and the guide arm described above.
[0019] The beneficial effects of this utility model are as follows:
[0020] In this invention, the limiting protrusion on the axle seat is embedded in the positioning groove on the protrusion on the side of the pressure plate, so that the axle seat and the pressure plate mutually limit each other in the axial direction of the axle tube. This allows the shank of the U-bolt to be aligned with the through hole, giving the shank and the through hole a high degree of coaxiality. As a result, the nut can better engage with the threads on the shank, and the nut can fully press the protrusion, which facilitates the assembly of the air suspension and effectively prevents the nut from loosening, ensuring that the vehicle can drive normally and improving the safety of vehicle driving. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the structure of this utility model;
[0022] Figure 2 This is an installation diagram of the present invention;
[0023] Figure 3 for Figure 1 Enlarged view of point A in the middle;
[0024] Figure 4 for Figure 1 View B. Detailed Implementation
[0025] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments:
[0026] like Figure 1 , 2As shown in Figures 3 and 4, this utility model discloses a connection structure between an air suspension axle tube and a guide arm, comprising a guide arm 10, an axle tube 20, two U-bolts 50, a bearing seat 30, and a pressure plate 40. The guide arm 10 is located above the axle tube 20, and their extension directions are perpendicular to each other. The bearing seat 30 is placed between the guide arm 10 and the axle tube 20. The bottom of the bearing seat 30 is shaped to fit the surface of the axle tube 20. Upward-protruding limiting protrusions 31 are provided on both sides of the bearing seat 30. The limiting protrusions 31 on both sides of the bearing seat 30 and the upper surface 301 of the bearing seat 30 form an upward-opening groove. The guide arm 10 is placed in this groove, such that the limiting protrusions 31 on both sides of the bearing seat 30 are respectively positioned on the guide arm 10. On both sides of the guide arm 10; the pressure plate 40 is pressed on the upper surface 102 of the guide arm 10. The pressure plate 40 has downwardly extending bosses 41 on both sides. The bosses 41 on both sides of the pressure plate 40 are located on both sides of the guide arm 10. The bottom of the bosses 41 is provided with upwardly recessed positioning grooves 411. On the same side of the guide arm 10, the limiting protrusion 31 protrudes upward and its top is embedded in the positioning groove 411 of the boss 41. In this way, the limiting protrusion 31 and the boss 41 on the same side of the guide arm 10 are engaged with each other. Two U-bolts 50 are located on both sides of the guide arm 10. Each U-bolt 50 includes a bent portion 52 and two rod portions 51 extending upward from both ends of the bent portion 52. The bent portion 52 is located below the shaft tube 20. The two rod portions 51 extend upward from both sides of the shaft tube 20 and pass through the through holes 413 provided on the boss 41. The top of the rod portion 51 passes through the through hole 413 from bottom to top. A nut 53 is screwed onto the top of the rod portion 51. The nut 53 is pressed against the top of the boss 41. Tightening the nut 53 uses the U-bolts 50 to tighten the shaft tube 20, thereby tightening the shaft tube 20, the shaft seat 30, the guide arm 10, and the pressure plate 40, and thus fixing the shaft tube 20 and the guide arm 10 together.
[0027] During air suspension assembly, the axle seat 30 is placed between the axle tube 20 and the guide arm 10, and the pressure plate 40 is placed above the guide arm 10, so that the boss 41 on the pressure plate 40 and the limiting boss 31 on the axle seat 30 engage with each other. Then, the U-bolt 50 is placed below the axle tube 20, so that the two rods 51 of the U-bolt 50 pass through the through hole 413. Finally, the nut 53 is tightened onto the rods 51 of the U-bolt 50. In the entire assembly process of this utility model, the limiting boss 31 on the axle seat 30 is embedded in the boss 41 on the side of the pressure plate 40. The positioning groove 411 opened on the upper part of the shaft seat 30 and the pressure plate 40 are mutually limited in the axial direction of the shaft tube 20 (i.e., the width direction of the guide arm 10), so that the shank 51 of the U-bolt 50 can be aligned with the through hole 413, so that the shank 51 and the through hole 413 have a high degree of coaxiality, so that the nut 53 can be well engaged with the thread on the shank 51. The nut 53 can fully press the boss 41, which facilitates the assembly of the air suspension and effectively prevents the nut 53 from loosening, ensuring that the vehicle can drive normally and improving the safety of vehicle driving.
[0028] In a preferred embodiment, the inner side of the positioning groove 411 extends to the inner side edge 410 of the boss 41. That is, the positioning groove 411 is formed by the outward indentation of the inner side edge 410 of the boss 41 and the upward indentation of the bottom of the boss 41. After the limiting protrusion 31 is embedded in the positioning groove 411, it is limited between the outer side edge 412 of the positioning groove 411 and the side surface 101 of the guide arm 10. Thus, after the guide arm 20 is placed on the bearing seat 30, the limiting protrusion 31 on the bearing seat 30 abuts against the side surface 101 of the guide arm 20, utilizing the bearing seat The guide arm 20 is defined by 30. After the pressure seat 40 is placed on the guide arm 20, the boss 41 of the pressure seat 40 is placed outside the limiting protrusion 31, so that the boss 41 and the limiting protrusion 31 engage with each other. Of course, in other embodiments, the positioning groove 411 can be set on the bottom surface of the boss 41, that is, the inner side of the positioning groove 411 does not extend to the inner side edge 410 of the boss 41. Correspondingly, the top of the limiting protrusion 31 is set to have an upward protrusion structure, so that the upward protrusion structure is embedded in the positioning groove 411.
[0029] Two limiting protrusions 31, offset along the length of the guide arm 10, are provided on both sides of the bearing seat 30, meaning the bearing seat 30 has four limiting protrusions 31. Two bosses 41, offset along the length of the guide arm 10, are provided on both sides of the pressure plate 40. On the same side of the guide arm 10, the two limiting protrusions 31 are respectively embedded in the positioning grooves 411 of the two bosses 41. Thus, the two rods 51 of the U-bolt 50 respectively pass through the through holes 413 of the two bosses 41 on the same side. Each boss 41 has a recess 414 recessed downwards from its top to accommodate the nut 53, and the through hole 413 extends downwards from the bottom of the recess 414 to the bottom of the boss 41.
[0030] A relief groove 32 is provided on the outer side of the limiting protrusion 31, which is recessed towards the inner side of the limiting protrusion 31. The relief groove 32 extends from the top of the limiting protrusion 31 to the bottom of the limiting protrusion 31. The shank 51 of the U-bolt 50 is accommodated in the relief groove 32. The relief groove 32 avoids the shank 51 of the U-bolt 50, thereby preventing the U-bolt 50 from interfering with the bearing seat 30 during assembly.
[0031] A positioning hole 42 is provided in the middle of the pressure plate 40. An upper pad 11 is clamped between the pressure plate 40 and the upper surface support of the guide arm 10. A positioning protrusion 111 is provided in the middle of the upper pad 11, which protrudes upward and is embedded in the positioning hole 42. The upper pad 11 is provided between the pressure plate 40 and the guide arm 10 to reduce the friction between the pressure plate 40 and the guide arm 10. The positioning protrusion 111 cooperates with the positioning hole 42 to position the upper pad 11. A lower pad 12 is provided between the lower surfaces 103 of the bearing seat 30 and the guide arm 10. The lower pad 12 can reduce the friction between the bearing seat 30 and the guide arm 10.
[0032] An upper positioning groove is provided on the lower surface 103 of the guide arm 10, and a lower positioning groove 34 is provided on the upper surface 301 of the bearing seat 30. A positioning post 35 is provided between the guide arm 10 and the bearing seat 30. The positioning post 35 passes through the lower pad 12. The lower half of the positioning post 35 is embedded in the lower positioning groove 34, and the upper half is embedded in the upper positioning groove. When assembling the guide arm 10 and the bearing seat 30, the positioning post 35 can be used to position the bearing seat 30 and the guide arm 10.
[0033] The cross-section of the shaft tube 20 is circular, that is, the shaft tube 20 is a cylindrical tube. A baffle 33 is provided at both ends of the bottom of the shaft seat 30. The two baffles 33 are located on both sides of the shaft tube 20. In this way, the two baffles 33 form the bottom shape of the shaft seat 30 into a structure that can wrap the outer shaft tube of the shaft tube 20. Specifically, the two baffles 33 and the bottom surface of the shaft seat 30 together form an arc-shaped mating surface that fits against the surface of the shaft tube 20. At least one baffle 33 is fixed to the surface of the shaft tube 20 by welding.
[0034] The air suspension of this utility model includes the connection structure between the air suspension axle tube and the guide arm described above. Other structures of the air suspension are the same as those in the prior art and will not be described in detail here.
[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. A connection structure between an air suspension axle tube and a guide arm, characterized in that, Includes guide arm, shaft tube, two U-bolts, shaft seat and pressure plate; The guide arm is located above the shaft tube, and the shaft seat is placed between the guide arm and the shaft tube. The shaft seat has upwardly protruding limiting protrusions on both sides, and the limiting protrusions on both sides of the shaft seat are located on both sides of the guide arm. The pressure plate is pressed on the upper surface of the guide arm, and the pressure plate has downwardly extending bosses on both sides, and the bosses on both sides of the pressure plate are located on both sides of the guide arm. The bottom of the bosses has upwardly recessed positioning grooves. On the same side of the guide arm, the limiting protrusions are embedded in the positioning grooves of the bosses. Two U-bolts are located on both sides of the guide arm. The bent part of the U-bolt is placed below the shaft tube, and the two rods extend upward and pass through the through hole on the boss. The rods of the U-bolt are screwed with nuts that are pressed against the top of the boss.
2. The connection structure between the air suspension axle and the guide arm as described in claim 1, characterized in that, The inner side of the positioning groove extends to the inner side of the boss, and the limiting protrusion is limited between the outer side of the positioning groove and the side of the guide arm.
3. The connection structure between the air suspension axle and the guide arm as described in claim 1, characterized in that, Two limiting protrusions are provided on both sides of the bearing seat, offset along the length of the guide arm. Two bosses are provided on both sides of the pressure plate, offset along the length of the guide arm. On the same side of the guide arm, the two limiting protrusions are respectively embedded in the positioning grooves of the two bosses.
4. The connection structure between the air suspension axle and the guide arm as described in claim 3, characterized in that, The boss has a recessed part that is recessed downward from its top to accommodate a nut, and a through hole extends downward from the bottom of the recess to the bottom of the boss.
5. The connection structure between the air suspension axle and the guide arm as described in claim 3, characterized in that, The outer surface of the limiting protrusion is provided with a relief groove that is recessed into the inner side of the limiting protrusion, and the shank of the U-bolt is accommodated in the relief groove.
6. The connection structure between the air suspension axle tube and the guide arm as described in claim 1, characterized in that, A positioning hole is provided in the middle of the pressure plate, and an upper pad is clamped between the pressure plate and the upper surface of the guide arm. The upper pad has a positioning protrusion that protrudes upward and is embedded in the positioning hole in the middle.
7. The connection structure between the air suspension axle and the guide arm as described in claim 1, characterized in that, A pad is provided between the bearing seat and the lower surface of the guide arm.
8. The connection structure between the air suspension axle and the guide arm as described in claim 7, characterized in that, The lower surface of the guide arm is provided with an upper positioning groove, the shaft seat is provided with a lower positioning groove, and a positioning post passing through the lower pad is provided between the guide arm and the shaft seat. Part of the positioning post is embedded in the upper positioning groove and the other part is embedded in the lower positioning groove.
9. The connection structure between the air suspension axle and the guide arm as described in claim 1, characterized in that, The cross-section of the shaft tube is circular. At both ends of the bottom of the shaft seat, there are baffles on both sides of the shaft tube. The two baffles and the bottom surface of the shaft seat together form an arc-shaped mating surface that fits against the surface of the shaft tube. At least one baffle is welded and fixed to the surface of the shaft tube.
10. An air suspension system, characterized in that, The air suspension shaft tube and guide arm connection structure as described in any one of claims 1-9.