Air suspension of semitrailer

Abstract

The utility model relates to an air suspension of a semitrailer, which comprises a guide arm support connected with a semitrailer body, a guide arm is rotatably hinged on the guide arm support, a shock absorber and a shock absorption steel plate are arranged on the guide arm, and two ends of the shock absorber are respectively arranged on an air bag component and the guide arm. The two ends of the shock absorption steel plate are arranged on the guide arm support and the guide arm respectively, the configuration distribution layout of shock absorption parts is optimized, the impact load on the shock absorber is effectively reduced, the shock absorption effect is good, and the driving smoothness and comfort of the semitrailer are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of manufacturing automobile parts, in particular to an air suspension of a semitrailer. Background Art

[0002] The suspension is one of the important assemblies on the car, which connects the frame and wheels elastically. Its main task is to transfer the force and torque acting between the wheels and the frame, and to ease the impact load transmitted to the frame by the uneven road surface, and attenuate the vibration of the load-bearing system caused by it, so as to ensure the smooth driving of the car.

[0003] In order to improve the ride comfort of the vehicle and reduce tire wear, many semi-trailer OEMs have adopted liftable air suspensions. In common semi-trailer liftable air suspensions, one lift airbag on each side acts on the guide arm, which is then connected to the car through the guide arm to mitigate the impact load caused by vibration and achieve smooth driving of the vehicle.

[0004] China Patent Publication (Announcement) No.: CN217672038U, Patent Title: An air suspension for a hydraulic low-bed semi-trailer, which solves the technical problem of "when problems occur in the air suspension system, the vehicle air suspension will collapse, the vehicle will touch the wheel arch, one side will be higher than the other, affecting the use of the vehicle and driving safety" through "0007 In order to achieve the above purpose, the utility model provides an air suspension for a hydraulic low-bed semi-trailer, including a frame, an air suspension device is arranged at the lower part of the frame, the air suspension device includes a load-bearing airbag, the load-bearing airbag is arranged as a two-layer structure, the inner layer of the load-bearing airbag is an inner airbag, the outer layer of the load-bearing airbag is an outer airbag, an intermediate cavity is formed between the inner airbag and the outer airbag, and an air pressure sensor is arranged in the intermediate cavity".

[0005] However, the location of the oil cylinder determines that the shock absorbing effect of the oil cylinder is not very good, and there is still room for further improvement. Summary of the invention

[0006] The purpose of the utility model is to provide an air suspension for a semitrailer to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the utility model is implemented through the following technical measures: an air suspension of a semi-trailer, including a guide arm support, characterized in that: a guide arm is rotatably hinged on the guide arm support, a rear car upper cover plate is arranged on the guide arm, and the rear car upper cover plate is fastened to the rear car by U-shaped bolts; a shock absorber lower fixing frame is arranged on the rear car upper cover plate, the shock absorber lower fixing frame is used to hinge the shock absorber, the other end of the shock absorber is hinged to the shock absorber upper fixing frame, and the shock absorber upper fixing frame is rigidly connected to the airbag assembly; a shock-absorbing steel plate lower fixing frame is arranged on the guide arm, the shock-absorbing steel plate lower fixing frame is hinged to the shock-absorbing steel plate, the other end of the shock-absorbing steel plate is hinged to the shock-absorbing steel plate fixing frame, and the shock-absorbing steel plate fixing frame is rigidly connected to the guide arm support.

[0008] Compared with the prior art, the utility model has the advantages that a shock absorber and a shock absorbing steel plate are arranged on the guide arm, and the two ends of the shock absorber are respectively arranged on the airbag assembly and the guide arm through fixing frames, and the two ends of the shock absorbing steel plate are respectively arranged on the guide arm support and the guide arm through fixing frames, thereby optimizing the configuration and distribution layout of the shock absorbing parts, effectively reducing the impact load on the shock absorber, achieving a better shock absorbing effect, and ensuring the driving smoothness and comfort of the semi-trailer.

[0009] As an improvement of the utility model, a wedge-shaped fixing seat is arranged between the guide arm and the airbag assembly. The purpose of selecting this design is to make up for the gap between the guide arm and the airbag assembly.

[0010] As an improvement of the utility model, the shock-absorbing steel plate is arranged on the center line of the guide arm support. The purpose of selecting this design is: there are two guide arm supports, which are arranged on the left and right sides under the body of the semi-trailer. The shock-absorbing steel plate is arranged on the center line of each guide arm support, which can absorb the impact load from the ground more smoothly and evenly.

[0011] As an improvement of the utility model, the shock absorber is arranged at the outer edge of the guide arm. The purpose of selecting this design is that the shock absorber is arranged at the outer edge of the guide arm, and its force point is closer to the edges on both sides, which can better absorb the left and right bumps of the semi-trailer.

[0012] As an improvement of the utility model, the shock absorber is a hydraulic shock absorber. The purpose of selecting this design is that the hydraulic shock absorber can change the shock absorption effect by adjusting the liquid flow and pressure, and has good adaptability to different loads, making the semi-trailer more stable and comfortable when driving on uneven roads. In addition, a pneumatic shock absorber can also be selected according to actual applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0014] In the attached picture:

[0015] Figure 1 It is a front view of the air suspension described in the utility model.

[0016] Figure 2 This is an exploded view of the air suspension described in the utility model.

[0017] Figure 3 This is a force analysis diagram of the shock absorber of the prior art described in the utility model.

[0018] Figure 4 This is a force analysis diagram of the shock absorber of this embodiment described in the utility model.

[0019] Figure 5 It is a top view of the air suspension described in the utility model.

[0020] Explanation of the reference numerals in the accompanying drawings: 1. guide arm support; 2. guide arm; 3. upper cover plate of rear car sedan; 4. U-shaped bolt; 5. rear car sedan; 6. lower fixing bracket of shock absorber; 7. shock absorber; 8. upper fixing bracket of shock absorber; 9. airbag assembly; 10. lower fixing bracket of shock-absorbing steel plate; 11. shock-absorbing steel plate; 12. upper fixing bracket of shock-absorbing steel plate; 13. wedge-shaped fixing seat; 14. vehicle body; 15. first fulcrum; 16. second fulcrum; 17. third fulcrum. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0022] Example 1

[0023] In the embodiments of the present utility model application, please refer to Figure 1 , Figure 2 and Figure 5 The present embodiment provides an air suspension for a semi-trailer, comprising a guide arm support 1 connected to a body 14 of the semi-trailer, a guide arm 2 rotatably hinged on the guide arm support 1, the hinge point being a third fulcrum 17, and the hinge method being that a bolt passes through a bushing fastened to the guide arm 2 and is then fixed with a nut. When the semi-trailer is traveling on an uneven road, the guide arm 2 will move up and down with the third fulcrum 17 as the rotation point. The guide arm 2 plays the role of bearing the airbag assembly 9 and guiding, and transmits the longitudinal and lateral forces and moments of the vehicle.

[0024] In the embodiments of the present utility model application, please refer to Figure 2 A rear car upper cover plate 3 is provided on the guide arm 2, and the rear car upper cover plate 3 is fastened with a rear car 5 by U-shaped bolts 4, and automobile tires are installed at both ends of the rear car 5.

[0025] A shock absorber lower fixing frame 6 is welded on the rear car upper cover plate 3, and the shock absorber lower fixing frame 6 is used to hinge the shock absorber 7. The other end of the shock absorber 7 is hinged to a shock absorber upper fixing frame 8, and the shock absorber upper fixing frame 8 is rigidly connected to the airbag assembly 9.

[0026] A damping steel plate lower fixing frame 10 is welded on the guide arm 2, and a damping steel plate 11 is hingedly connected to the damping steel plate lower fixing frame 10, and a damping steel plate upper fixing frame 12 is hingedly connected to the other end of the damping steel plate 11, and the damping steel plate upper fixing frame 12 is rigidly connected to the guide arm support 1. The damping steel plate 11 is a commercially available product, and has fixing holes at both ends, which can be fixed by bolt assembly.

[0027] In the embodiment of the utility model application, a wedge-shaped fixing seat 13 is provided between the guide arm 2 and the airbag assembly 9. The wedge-shaped fixing seat 13 is used to make up the gap between the guide arm 2 and the airbag assembly 9.

[0028] In the embodiments of the present utility model application, please refer to Figure 5 The shock absorbing steel plate 11 is arranged on the center line of the guide arm support 1. There are two guide arm supports 1, which are arranged on the left and right sides under the body 14 of the semi-trailer. The shock absorbing steel plate 11 is arranged on the center line of each guide arm support 1, which can absorb the impact load from the ground relatively stably and evenly.

[0029] In the embodiment of the utility model application, the shock absorber 7 is arranged at the outer edge of the guide arm 2, and its force point is closer to the edges on both sides, which can better absorb the left and right bumps of the semi-trailer.

[0030] In the embodiment of the utility model application, the shock absorber 7 is a hydraulic shock absorber. The hydraulic shock absorber can change the shock absorption effect by adjusting the liquid flow and pressure, and has good adaptability to different loads, making the semi-trailer more stable and comfortable when driving on uneven roads. In addition, a pneumatic shock absorber can also be selected according to actual applications.

[0031] The present embodiment provides an air suspension for a semi-trailer, which are connected as follows: the guide arm 2 is hinged at the third fulcrum 17 and is rotatably fixed to the guide arm support 1; the two ends of the shock absorber 7 are respectively connected to the airbag assembly 9 and the guide arm 2 through a fixing frame; the two ends of the shock-absorbing steel plate 11 are respectively connected to the guide arm support 1 and the guide arm 2 through a fixing frame.

[0032] Please refer to Figure 3, because the shock absorber 7 in the prior art has its two ends connected to the guide arm support 1 and the guide arm 2 respectively through a fixing frame. Among them, the force F2 of the shock absorber 7, the arm L2 of the shock absorber 7 (the vertical distance from the second fulcrum 16 to the third fulcrum 17), the force F1 of the vehicle body 14 borne by the airbag assembly 9 and the guide arm 2, and the arm L1, because L1 is greater than L2, according to the moment balance principle, F2 is greater than F1, so the force on the shock absorber 7 here is relatively large, and the shock absorber 7 is easy to work over the rated load and lose the shock absorption function.

[0033] This embodiment provides an air suspension for a semi-trailer, please refer to Figure 4 The position of the shock absorber 7 is different from that of the prior art. One end of the shock absorber is connected to the airbag assembly 9 through the upper shock absorber bracket 8 to form a first fulcrum 15, and the other end is connected to the guide arm 2 through the lower shock absorber bracket 6 to form a second fulcrum 16. The force of the shock absorber 7 is different from that of the prior art. The force F3 of the shock absorber 7 no longer bears torque, but bears the pressure of the vehicle body 14 together with the airbag assembly 9. In addition, the shock absorbing steel plate 11 can absorb part of the load, so the force of the shock absorber 7 here is smaller than that of the prior art, and the shock absorber 7 has a good working effect and a long service life.

[0034] The beneficial effect of the utility model is that the shock absorber 7 and the shock absorbing steel plate 11 are arranged on the guide arm 2, and the two ends of the shock absorber 7 are respectively arranged on the airbag assembly 9 and the guide arm 2 through the fixing frames, and the two ends of the shock absorbing steel plate 11 are respectively arranged on the guide arm support 1 and the guide arm 2 through the fixing frames, so that the configuration distribution layout of the shock absorbing parts is optimized, the impact load on the shock absorber 7 is effectively reduced, the shock absorbing effect is better, and the driving smoothness and comfort of the semi-trailer are guaranteed.

[0035] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An air suspension for a semitrailer, comprising a guide arm support (1), characterized in that: The guide arm support (1) is rotatably hinged with a guide arm (2), and a rear car upper cover plate (3) is arranged on the guide arm (2), and the rear car upper cover plate (3) is fastened to the rear car (5) through U-shaped bolts (4); a shock absorber lower fixing frame (6) is arranged on the rear car upper cover plate (3), and the shock absorber lower fixing frame (6) is used to hinge the shock absorber (7), and the other end of the shock absorber (7) is hinged with a shock absorber upper fixing frame (8), and the shock absorber upper fixing frame (8) is rigidly connected to the airbag assembly (9); a shock absorber steel plate lower fixing frame (10) is arranged on the guide arm (2), and the shock absorber steel plate lower fixing frame (10) is hinged with a shock absorber steel plate (11), and the other end of the shock absorber steel plate (11) is hinged with a shock absorber steel plate upper fixing frame (12), and the shock absorber steel plate upper fixing frame (12) is rigidly connected to the guide arm support (1).

2. The air suspension of a semitrailer according to claim 1, characterized in that: A wedge-shaped fixing seat (13) is provided between the guide arm (2) and the airbag assembly (9).

3. The air suspension of a semitrailer according to claim 1, characterized in that: The shock-absorbing steel plate (11) is arranged on the center line of the guide arm support (1).

4. The air suspension of a semitrailer according to claim 1, characterized in that: The shock absorber (7) is arranged on the outer edge of the guide arm (2).

5. The air suspension of a semitrailer according to claim 1, characterized in that: The shock absorber (7) is a hydraulic shock absorber.

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