Air independent suspension of load-carrying vehicle

Abstract

The utility model discloses an air independent suspension of a load-carrying vehicle, which comprises a wheel side system, a steering knuckle, a steering rod mechanism and a supporting arm assembly, the steering rod mechanism comprises a driving rocker arm, a driven rocker arm, a steering pull rod and a relay rod, and one end of the driving rocker arm and one end of the driven rocker arm are respectively and correspondingly connected with two ends of the relay rod in a rotating mode. The supporting arm assembly comprises a vertical arm, an upper A-shaped arm and a lower A-shaped arm, the vertex angle ends of the upper A-shaped arm and the lower A-shaped arm are correspondingly and rotationally connected to the upper end and the lower end of the vertical arm through first maintenance-free bearings respectively, and the other two ends of the upper A-shaped arm and the other two ends of the lower A-shaped arm are rotationally installed on the vehicle frame. And the other end of the driven rocker arm is rotationally connected with a connecting seat through a second maintenance-free bearing, and the connecting seat is fixedly mounted on the frame. The wheel side system on each side can independently jump through the upper A-shaped arm and the lower A-shaped arm, so that the comfort of the whole vehicle is improved, impact force on one side can be prevented from being transmitted to the other side, the friction part is free of maintenance, the operation is simplified, and the cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle suspensions, and particularly to an air independent suspension for a load vehicle. Background Art

[0002] A suspension is a general term for all force transmission connecting devices between the vehicle frame or the integral body of a vehicle and the axle or wheels. Its function is to transmit the force and torque acting between the wheels and the vehicle frame, and buffer the impact force transmitted from the uneven road surface to the vehicle frame or body, and reduce the vibration caused thereby, so as to ensure that the vehicle can run smoothly.

[0003] Currently, for vehicles with a large load, such as trailers and semi-trailers, etc., they usually adopt non-independent suspensions such as leaf spring suspensions. The structural feature is that the two side wheels are connected by an integral vehicle frame. The wheels together with the axle are suspended under the vehicle frame or body through an elastic suspension system. Although it has the advantages of simple structure, low cost, high strength, easy maintenance, etc., its comfort and handling stability are relatively poor.

[0004] In addition, during the process of transporting goods, it is necessary to regularly add lubricating oil (grease) to the friction parts of the vehicle to achieve functions such as anti-corrosion, rust prevention, and wear reduction, and ensure the stability and safety of the vehicle during driving. With the gradual increase of transportation costs, regularly adding lubricating oil is not only inconvenient to operate, but also not conducive to cost savings. Content of the Utility Model

[0005] The purpose of the utility model is to overcome the defects and deficiencies existing in the prior art, and provide an air independent suspension for a load vehicle, so that the wheel side system on each side can jump independently through the upper and lower A-shaped arms, so as to improve the comfort of the whole vehicle, prevent the impact force on one side from being transmitted to the other side, and can realize the maintenance-free of the friction parts, so as to simplify the operation and be conducive to cost savings.

[0006] To achieve the above purpose, the utility model provides the following technical solution:

[0007] An air independent suspension for a load vehicle includes a wheel side system, a steering knuckle fixedly connected to the wheel side system, a steering rod mechanism, and a support arm assembly. The steering rod mechanism includes a driving rocker arm, a driven rocker arm, a steering tie rod, and a relay rod. One ends of the driving rocker arm and the driven rocker arm are respectively rotatably connected to two ends of the relay rod. The characteristics are as follows: the support arm assembly includes a vertical arm, an upper A-shaped arm, and a lower A-shaped arm. The apex ends of the upper A-shaped arm and the lower A-shaped arm are respectively rotatably connected to the upper and lower ends of the vertical arm through first maintenance-free bearings, and the other two ends of the upper A-shaped arm and the lower A-shaped arm are rotatably installed on the vehicle frame; the other end of the driven rocker arm is rotatably connected with a connecting seat through a second maintenance-free bearing, and the connecting seat is fixedly installed on the vehicle frame.

[0008] Further, ball joints are installed at the other two ends of the upper A-shaped arm and the lower A-shaped arm.

[0009] Further, bolts penetrate through both ends of the pin shaft of the ball joint and are screwed into the screw holes on the vehicle frame, rotatably mounting the other two ends of the upper A-shaped arm and the lower A-shaped arm on the vehicle frame respectively.

[0010] Further, a kingpin is rotatably installed on the outer side of the vertical arm for rotatably installing the wheel side system.

[0011] Further, an airbag mounting seat is fixedly connected to the inner side of the lower end of the vertical arm, an airbag is fixedly installed on the airbag mounting seat, and the airbag extends upward to the inner side of the upper A-shaped arm.

[0012] Further, a shock absorber mounting seat is fixedly connected to the front side of the vertical arm, and a shock absorber is fixedly installed on the shock absorber mounting seat.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. The present utility model uses the support arm assembly as the suspension main body, enabling the wheel side system, together with the support arm assembly and the airbag, to bear the vertical load of the vehicle. The airbag and the shock absorber buffer and attenuate the impact from the ground together, and the wheel side system on each side can bounce independently through the upper and lower A-shaped arms, not only improving the comfort of the whole vehicle but also preventing the impact on one side from being transmitted to the other side.

[0015] 2. The present utility model uses maintenance-free bearings to install the upper and lower A-shaped arms in the support arm assembly and the passive swing arm in the steering rod mechanism, realizing the maintenance-free of the friction parts of the above components, eliminating the need for regular lubrication (greasing), which not only simplifies the operation but also helps to save costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the present utility model.

[0017] Figure 2 It is a schematic structural diagram of the support arm assembly in the present utility model.

[0018] Figure 3 It is a schematic structural diagram of the wheel side system and the steering rod mechanism in the present utility model.

[0019] Figure 4 It is a schematic structural diagram of the passive swing arm in the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with 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, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] Refer to Figures 1-4 , an air independent suspension of a load vehicle, including a wheel end system 1, a knuckle 2 fixedly connected to the wheel end system 1, a steering rod mechanism 3 and a support arm assembly 4. The steering rod mechanism 3 includes a driving rocker arm 5, a driven rocker arm 6, a steering tie rod 7 and a relay rod 8. One ends of the driving rocker arm 5 and the driven rocker arm 6 are respectively rotatably connected to both ends of the relay rod 8. The support arm assembly 4 includes a vertical arm 9, an upper A-shaped arm 10 and a lower A-shaped arm 11. The apex ends of the upper A-shaped arm 10 and the lower A-shaped arm 11 are respectively rotatably connected to the upper and lower ends of the vertical arm 9 through a first maintenance-free bearing 12. The other two ends of the upper A-shaped arm 10 and the lower A-shaped arm 11 are both rotatably installed on the vehicle frame; the other end of the driven rocker arm 6 is rotatably connected to a connecting seat 14 through a second maintenance-free bearing 13, and the connecting seat 14 is fixedly installed on the vehicle frame.

[0022] In the present invention, ball joints 15 are installed at the other two ends of the upper A-shaped arm 10 and the lower A-shaped arm 11.

[0023] In the present invention, bolts penetrate through both ends of the pin shaft of the ball joint 15 and are screwed into the screw holes on the vehicle frame, so as to rotatably install the other two ends of the upper A-shaped arm 10 and the lower A-shaped arm 11 on the vehicle frame respectively.

[0024] In the present invention, a kingpin 16 is rotatably installed on the outer side of the vertical arm 9, so as to rotatably install the wheel end system 1 on the outer side of the vertical arm 6.

[0025] In the present invention, an airbag mounting seat 17 is fixedly connected to the inner side of the lower end of the vertical arm 9, an airbag 18 is fixedly installed on the airbag mounting seat 17, and the airbag 18 extends upward to the inner side of the upper A-shaped arm 10.

[0026] In the present invention, a shock absorber mounting seat 19 is fixedly connected to the front side of the vertical arm 9, and a shock absorber 20 is fixedly installed on the shock absorber 18 mounting seat.

[0027] The following further explains the present invention in conjunction with the accompanying drawings:

[0028] During assembly, connect the wheel end system 1 to the kingpin 16, and fixedly install the airbag 18 and the shock absorber 20 on the airbag mounting seat 17 and the shock absorber mounting seat 19 respectively, and thus complete the installation of the wheel end system 1, the airbag 18 and the shock absorber 20.

[0029] Then, pass the bolts through both ends of the pin shaft of the spherical hinge 15 and screw them into the screw holes on the vehicle frame, so as to rotatably mount the other two ends of the upper A-shaped arm 10 and the lower A-shaped arm 11 on the vehicle frame respectively.

[0030] And, connect the upper ends of the airbag 18 and the shock absorber 20 to the vehicle frame respectively.

[0031] In addition, fixedly mount the connecting seat 14 on the vehicle frame, and connect the other end of the active rocker arm 5 to the output shaft of the vehicle steering gear.

[0032] When used with the vehicle, the wheel side system 1, together with the support arm assembly 4 and the airbag 18, bears the vertical load of the vehicle. The airbag 18 and the shock absorber 20 buffer and attenuate the impact from the ground together, and each side of the wheel side system 1 can bounce independently through the upper A-shaped arm 10 and the lower A-shaped arm 11, which not only improves the comfort of the whole vehicle, but also can prevent the impact force on one side from being transmitted to the other side.

[0033] In addition, since maintenance-free bearings are used to mount the upper A-shaped arm 10 and the lower A-shaped arm 11 in the support arm assembly 4 and the passive rocker arm 6 in the steering rod mechanism 3, the friction parts of the above-mentioned components are realized to be maintenance-free. Therefore, there is no need to add lubricating oil (grease) regularly, which not only simplifies the operation, but also helps to save costs.

[0034] It should be noted that since vehicles with large loads such as trailers and semi-trailers are prone to tire wear problems during steering, during steering, the air pressure of the airbag 18 can be controlled through the pipeline to make the tires not bear the vertical load, so as to reduce tire wear.

[0035] Although this specification is described according to the embodiments, not each embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0036] Therefore, the above description is only the preferred embodiment of the present application, and is not used to limit the scope of implementation of the present application; that is, all equivalent transformations made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. An air independent suspension for a load-carrying vehicle, comprising a wheel side system, a steering knuckle fixedly connected to the wheel side system, a steering rod mechanism and a support arm assembly, wherein the steering rod mechanism comprises an active rocker arm, a passive rocker arm, a steering tie rod and a relay rod, wherein one end of the active rocker arm and the passive rocker arm are rotatably connected to the two ends of the relay rod respectively, and characterized in that: The support arm assembly includes a vertical arm, an upper A-shaped arm and a lower A-shaped arm. The top angle ends of the upper A-shaped arm and the lower A-shaped arm are rotatably connected to the upper and lower ends of the vertical arm respectively through a first maintenance-free bearing, and the other two ends of the upper A-shaped arm and the lower A-shaped arm are rotatably installed on the frame; the other end of the passive rocker arm is rotatably connected to a connecting seat through a second maintenance-free bearing, and the connecting seat is fixedly installed on the frame.

2. The air independent suspension for a load-carrying vehicle according to claim 1, characterized in that: The other two ends of the upper A-shaped arm and the lower A-shaped arm are both equipped with ball joints.

3. The air independent suspension for a load-carrying vehicle according to claim 2, characterized in that: Bolts penetrate through both ends of the pin shaft of the ball joint and are screwed into screw holes on the vehicle frame, and the other two ends of the upper A-shaped arm and the lower A-shaped arm are respectively rotated and installed on the vehicle frame.

4. The air independent suspension for a load-carrying vehicle according to claim 1, characterized in that: A king pin is rotatably mounted on the outer side of the vertical arm for rotatably mounting the wheel rim system.

5. The air independent suspension for a heavy-duty vehicle according to claim 1, characterized in that: An airbag mounting seat is fixedly connected to the inner side of the lower end of the vertical arm, an airbag is fixedly mounted on the airbag mounting seat, and the airbag extends upward to the inner side of the upper A-shaped arm.

6. The air independent suspension for a load-carrying vehicle according to claim 1, characterized in that: The front side of the vertical arm is fixedly connected with a shock absorber mounting seat, and the shock absorber is fixedly mounted on the shock absorber mounting seat.

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