Double-bridge eight-air-bag air suspension structure and working method

Abstract

According to the double-axle eight-airbag air suspension structure and the working method, the height of a suspension can be adjusted according to different road conditions, the large jumping stroke of a vehicle can be achieved, the change of the input and output included angle of a transmission shaft when axles jump can be adapted, and the compact structure and axle load balance between axles are achieved; according to the technical scheme, the device comprises a thrust rod guide device, a stabilizer bar device and an air spring device. In the thrust rod guide device, one ends of two upper thrust rods are hinged along the longitudinal direction of the frame and are respectively hinged with a combined support fixed on the upper plane of the axle, the combined support is connected with the frame and is hinged with a lower thrust rod, and the lower thrust rod support is connected with the axle. The stabilizer bar device comprises a transverse stabilizer and a bracket which are respectively arranged on the front side of the front axle and the rear side of the rear axle. Each air spring device comprises a balance beam and two air springs, one air spring is connected with the frame through a support, the other air spring is connected with the combined supports, and each combined support is connected with two air spring devices.

Description

Technical Field

[0001] The invention relates to the technical field of automobile suspension, and in particular to a double-bridge eight-airbag air suspension structure and a working method. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] At present, based on the emphasis on highway maintenance, limiting overload is becoming more and more important, so air suspension has gradually entered the heavy-duty vehicle market. The structural forms of air suspension are diverse, mainly reflected in the arrangement of air springs, the arrangement of guide mechanisms, the selection of shock absorbers, the selection and arrangement of height valves. Different structural forms reflect different vehicle performance.

[0004] The existing air suspension structure has a leaf spring as a guide arm and an air spring as an elastic element; there is a double trailing arm four-link air suspension; but the problem is that when the axle bounces, the phase change of the input and output angles of the drive shaft of the drive axle is limited, and the downward jump of the axle is small, which affects the ground contact ability and driving stability of heavy-loaded vehicles, especially heavy-duty vehicles used on off-road roads. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a double-axle eight-airbag air suspension structure and a working method, which can adjust the height of the suspension according to different road conditions, can achieve a large jumping stroke of the vehicle, and can adapt to the changes in the input and output angles of the drive shaft when the axle bounces, thereby achieving a compact structure and balanced axle loads between axles.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] A double-bridge eight-airbag air suspension structure, comprising a thrust rod guide device, a stabilizer bar device, and an air spring device;

[0008] The thrust rod guide device comprises a combined support, a lower thrust rod support, a combined bracket, an upper thrust rod and a lower thrust rod. There are two upper thrust rods, one end of the two upper thrust rods are connected by hinged connection and arranged longitudinally along the frame, the other ends of the two upper thrust rods are respectively hinged to the combined support, and the combined support is fixed to the upper plane of the axle; there are two combined brackets, which are respectively arranged on both sides of the upper thrust rod; the upper end of each combined bracket is connected to the frame, and the lower end is hinged to one end of the two lower thrust rods, and the other ends of the two lower thrust rods are respectively connected to the lower thrust rod supports; there are four lower thrust rod supports, two of which are fixedly connected to the lower plane of the front axle, and the remaining two lower thrust rod supports are fixedly connected to the rear axle;

[0009] The stabilizer bar device comprises a lateral stabilizer and a bracket, one end of the lateral stabilizer is connected to the vehicle frame through the bracket, and the other end is connected to the lower thrust rod support; there are two stabilizer bar devices, which are respectively arranged at the front side of the front axle and the rear side of the rear axle;

[0010] The air spring device includes a balance beam and two air springs, both of which are installed on the upper plane of the balance beam, one of which is connected to the frame through an upper air spring bracket, and the upper end of the other air spring is connected to the combined bracket; each combined bracket is connected to two air spring devices.

[0011] Furthermore, the balance beam is fixedly connected to the axle via two U-bolts.

[0012] Furthermore, a shock absorber connecting seat and a limit connecting seat are also provided on the upper plane of the equalizing beam.

[0013] Furthermore, a shock absorbing device is provided on the equalizing beam, and the shock absorbing device is a double-acting cylinder shock absorber. The upper end of the shock absorber is connected to the shock absorber bracket fixed on the frame through a rubber bushing, and the lower end is hinged to the shock absorber connecting seat through a rubber bushing and a connecting pin.

[0014] Furthermore, a limiting device is also provided on the equalizing beam, and the limiting device is a limiting chain, the upper end of the limiting chain is connected to the frame through a limiting chain bracket, and the lower end is connected to the limiting connecting seat.

[0015] Furthermore, it also includes a pipeline system, which includes a height valve, a stop valve, a relief valve and a pipeline; the height valve, the stop valve and the relief valve are all arranged on the frame.

[0016] Furthermore, the air spring is connected to the height valve through a pipeline; a stop valve is arranged between the air spring and the height valve.

[0017] Furthermore, an inflation valve and an deflation valve are provided in the height valve.

[0018] Furthermore, the control rod includes a horizontal rod and a vertical rod, one end of the horizontal rod is connected to the height valve, and the other end is hinged to the top end of the vertical rod, the bottom end of the vertical rod is fixedly connected to the equalizing beam, the height valve is connected to the horizontal rod, and the control rod is used to control the opening and closing of the inflation valve and the deflation valve.

[0019] A working method of a double-bridge eight-airbag air suspension structure, comprising:

[0020] When the vehicle load is at the design value, the crossbar of the control lever is in a horizontal state, the suspension is in a balanced state, and the height value of the plane on the frame is the design value;

[0021] When the load on the vehicle increases, the axle moves closer to the frame, and the hinged end of the crossbar of the control rod rises. Under the action of the crossbar of the control rod, the inflation valve opens, and compressed air enters the air spring, raising the frame and the body until the frame rises to its original height.

[0022] When the load on the car decreases, the axle moves away from the frame, and the hinged end of the crossbar of the control rod moves downward. Under the action of the crossbar of the control rod, the air bleed valve opens, and the air in the air spring is discharged into the atmosphere, and the body and frame are immediately lowered to their original height.

[0023] The beneficial effects of the present invention are as follows:

[0024] The double-bridge eight-airbag air suspension of the present invention can be used for heavy-duty vehicles and tractors, and is particularly suitable for heavy-duty vehicles with a smaller wheelbase. The upper thrust rod and the lower thrust rod form a parallelogram mechanism, so that the drive axle only moves in translation when vibrating, achieving axle load balance between the axles, greatly improving the smoothness and stability of the vehicle's driving, and fundamentally improving the ride comfort of the vehicle. The structure is reasonable and compact, the force is balanced, and the dynamic load of the wheels is reduced; a thrust rod guide structure is provided, and the parallelogram layout allows the axle to bounce up and down through one end of the lateral stabilizer connected to the frame through a bracket, and the other end connected to the axle, so that the suspension only moves in translation without torsion, and the input and output angle phases of the transmission shaft are It remains unchanged to meet the requirement of constant speed movement; at the same time, axle lower jump limit chain is set to meet the large jump travel of the vehicle axle. At the same time, when driving on uneven roads, the wheels that are not touching the ground can be lifted to protect the air springs and shock absorbers; the height valve is fixed on the frame and connected to the stop valve through pipelines. The two height valves control four air springs respectively. When the axle jump reaches a certain height, the height valve starts the switch of the inlet and outlet ports to inflate and deflate the airbags on the air springs to adjust the height of the air springs, so that they can maintain a certain working height under any load and the frame height is not affected by the load. A stop valve is set between the height valve and the air spring to meet the requirements of air circuit pressure maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0026] Figure 1 It is a schematic diagram of the overall structure of the double-bridge eight-airbag air suspension of the present invention;

[0027] Figure 2 It is a schematic structural diagram of the thrust rod guide device assembly of the present invention;

[0028] Figure 3 It is a schematic diagram of the structure of the stabilizer bar assembly of the present invention;

[0029] Figure 4 It is a schematic diagram of the structure of the air spring device of the present invention;

[0030] Figure 5 This is a schematic diagram of the structure of the combined support of the present invention;

[0031] Figure 6 It is a schematic diagram of the structure of the equalizing beam of the present invention;

[0032] Figure 7 It is a schematic diagram of the structure of the shock absorber device of the present invention;

[0033] Figure 8 It is a schematic diagram of the structure of the limiting device of the present invention;

[0034] Fig. 9 It is the pipeline principle diagram of the present invention.

[0035] In the figure: 1 is a thrust rod guide device, 1-1 is a lateral thrust rod, 1-2 is a combined support, 1-3 is a lower thrust rod, 1-4 is a combined bracket, 1-5 is a lower thrust rod support, 1-6 is an upper thrust rod, 2 is a stabilizer bar device, 2-1 is a lateral stabilizer, 2-2 is a bracket, 3 is an air spring device, 3-1 is an air spring, 3-2 is an air spring bracket, 3-3 is a balancing beam, 3-4 is a U-bolt, 4 is a shock absorber device, 4-1 is a shock absorber, 4-2 is a shock absorber bracket, 5 is a limit device, 5-1 is a rubber buffer device, 5-2 is a limit chain, 5-3 is a limit chain bracket, 6 is a pipeline system, 6-1 is a height valve, 6-2 is a stop valve, and 6-3 is a relief valve. DETAILED DESCRIPTION

[0036] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0037] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof;

[0038] The embodiment of the present invention discloses a double-bridge eight-airbag air suspension device, such as Figure 1-4As shown, it includes a thrust rod guide device 1, a stabilizer rod device 2, an air spring device 3, a shock absorber 4-1 device 4 and a limit device 5; the thrust rod guide device 1 includes a combined support 1-2, a lower thrust rod support 1-5, a combined bracket 1-4 and a lower thrust rod 1-3, the thrust rod guide device 1 is fixed to the upper plane of the vehicle axle through the combined support 1-2, and is fixed to the lower plane of the vehicle axle through the lower thrust rod support 1-5, one end of the lower thrust rod 1-3 is connected to the lower thrust rod support 1-5, and the other end is connected to the combined support 1-2. Combined support 1-2; the stabilizer bar device 2 includes a lateral stabilizer 2-1 and a bracket 2-2, one end of the lateral stabilizer 2-1 is connected to the frame through the bracket 2-2, and the other end is connected to the lower thrust rod support 1-5; the air spring device 3 includes an equalizing beam 3-3 and two air springs 3-1, the air springs 3-1 are both installed on the equalizing beam 3-3, the upper end of one of the air springs 3-1 is connected to the combined bracket 1-4, and the other air spring 3-1 is connected to the frame through the upper air spring bracket 3-2.

[0039] The thrust rod guide device 1 also includes a transverse thrust rod 1-1 and an upper thrust rod 1-6; there are two transverse thrust rods 1-1 and two upper thrust rods 1-6, one end of the two upper thrust rods 1-6 are connected by hinged connection and arranged along the longitudinal direction of the frame, and the other ends of the two upper thrust rods 1-6 are respectively hinged to the combined support 1-2, and the combined support 1-2 is respectively fixedly connected to the upper plane of the front axle and the rear axle; there are two transverse thrust rods 1-1, one end of the transverse thrust rod 1-1 is hinged to the combined support 1-2, and the other end is hinged to the upper plane of the front axle and the rear axle. Frame connection; there are two combined brackets 1-4, and they are arranged on both sides of the upper thrust rod 1-6 along the transverse direction of the frame. Each combined bracket 1-4 is hinged to two lower thrust rods 1-3. One end of the lower thrust rod 1-3 is hinged to the combined bracket 1-4, and the other end is hinged to the lower thrust rod support 1-5. There are four lower thrust rod supports 1-5 and four lower thrust rods 1-3, and they are arranged along the longitudinal direction of the frame. Two of the lower thrust rod supports 1-5 are fixedly connected to the lower plane of the front axle, and the remaining two lower thrust rod supports 1-5 are fixedly connected to the rear axle. The transverse thrust rod 1-1 bears the transverse load on the axle to prevent the axle from moving laterally. The upper thrust rod 1-6 and the lower thrust rod 1-3 form a parallelogram mechanism in the vertical plane, so that the drive axle only moves in translation when vibrating, and does not generate torsion. At the same time, they bear all longitudinal forces, lateral forces and moments of the frame and wheels. Figure 5 As shown, the combined bracket 1-4 adopts a casting structure. In addition to providing a fixing interface for the lower thrust rod 1-3, it also serves as a support for the air spring 3-1, which can meet the requirements of difficult layout of air springs in short wheelbases.

[0040] The stabilizer bar device 2 includes two lateral stabilizers 2-1 and two brackets 2-2. One end of the lateral stabilizer 2-1 is connected to the frame through the bracket 2-2, and the other end is connected to the lower thrust rod support 1-5. The two lateral stabilizers 2-1 are connected as a whole through a connecting rod. There are two stabilizer bar devices 2. The two stabilizer bar devices 2 are respectively arranged on the front side of the front axle and the rear side of the rear axle to reduce the body roll and improve the turning stability of the whole vehicle.

[0041] The air spring device 3 includes a balancing beam 3-3 and two air springs 3-1. The air springs 3-1 are respectively installed at both ends of the balancing beam 3-3. The upper end of one of the air springs 3-1 is connected to the combined bracket 1-4, and the other air spring 3-1 is connected to the frame through the air spring bracket 3-2. The balancing beam 3-3 is fixedly connected to the axle through two U-bolts 3-4. Each combined bracket 1-4 can connect two air springs 3-1, so that each combined bracket 1-4 can connect two air spring devices 3. The balancing beams 3-3 of the two air spring devices 3 are respectively fixedly connected to the front axle and the rear axle; two combined brackets 1-4 are arranged on both sides of the frame. Four air spring devices 3 can be connected on both sides of the frame, two of which are connected to the front axle and two are connected to the rear axle. In addition to the air springs installed for support, each balancing beam 3-3 is also provided with a shock absorber 4-1 and a limit connection seat, such as Figure 6 shown.

[0042] like Figure 7 In order to accelerate the attenuation of vibration and improve the riding comfort of the driver, a bidirectional cylindrical shock absorber 4-1 is arranged on each equalizing beam 3-3. The upper end of the shock absorber 4-1 is connected to the shock absorber device 4 fixed on the frame through a rubber bushing, and the lower end is hinged to the shock absorber connecting seat through a rubber bushing and a connecting pin, which can buffer the vibration of the frame and the axle.

[0043] like Figure 8 As shown, a rubber buffer device 5-1 is also installed on the lower plane of the frame to limit the maximum deformation of the air spring 3-1 and prevent the axle from directly hitting the frame. A limit chain 5-2 is also provided, the upper end of the limit chain 5-2 is connected to the frame through a limit chain bracket 5-3, and the lower end is connected to the limit connection seat. When driving on an uneven road, the wheel can be lifted together with the axle to protect the air spring 3-1 and the shock absorber 4-1.

[0044] The frame is also provided with a pipeline system 6, which includes a height valve 6-1, a stop valve 6-2, a relief valve 6-3 and a pipeline; the height valve 6-1, the stop valve 6-2 and the relief valve 6-3 are all provided on the frame. Fig. 9As shown, the air spring 3-1 is connected to the height valve 6-1 through a pipeline, and the air source drawn from the auxiliary air reservoir is filled into the air spring 3-1 through the overflow valve 6-3 and the height valves 6-1 on both sides. The air springs on the same side of the frame are connected in parallel, and a height valve 6-1 is used to control their filling and deflation, thereby adjusting the height of the upper plane of the frame from the ground.

[0045] The height valve 6-1 is fixed on the frame and connected to the stop valve 6-2 through a pipeline. The two height valves 6-1 control the four air springs 3-1 respectively. When the axle bounce reaches a certain height, the height valve 6-1 starts the switch of the inlet and outlet ports to inflate and deflate the airbag on the air spring 3-1 to adjust the height of the air spring 3-1 so that it can maintain a certain working height under any load and the frame height is not affected by the load. A stop valve 6-2 (electrically controlled or manually) is set between the height valve 6-1 and the air spring 3-1 to meet the air circuit pressure maintenance requirements.

[0046] Working method:

[0047] The other end of the height valve 6-1 is connected to the axle through a control rod. When the control rod is in a horizontal state, the system is in a balanced state. At this time, the height value of the plane on the frame is the design value. There are two valves in the height valve 6-1: an air filling valve for the ventilation source and an air release valve for the atmosphere. Both valves are operated by the control rod. When the load of the car increases and the axle moves closer to the frame, the control rod rises, and the air filling valve is opened through the rocker mechanism, and the compressed air enters the air spring 3-1, so that the frame and the body are raised until the original distance between the body and the axle is restored. When the load decreases and the axle moves away from the frame, the control rod moves down and the air release valve is opened, and the air in the air spring 3-1 is discharged into the atmosphere, and the body and the frame are immediately lowered to the original distance, so as to adjust the height of the air spring 3-1, so that it can maintain a certain working height under any load, so that the frame height is not affected by the load. In this way, the variable stiffness of the suspension system is achieved, so that the suspension system has a lower frequency deviation under no-load and full-load conditions, and the driving smoothness of the car is guaranteed. At the same time, the air springs 3-1 of the two bridges on one side are connected in series with pipelines to ensure the force balance of each bridge.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A double-bridge eight-airbag air suspension structure, characterized in that: It includes a thrust rod guide device, a stabilizer bar device, and an air spring device; The thrust rod guide device comprises a combined support, a lower thrust rod support, a combined bracket, an upper thrust rod and a lower thrust rod. There are two upper thrust rods, one end of the two upper thrust rods are connected by hinged connection and arranged longitudinally along the frame, the other ends of the two upper thrust rods are respectively hinged to the combined support, and the combined support is fixed to the upper plane of the axle; there are two combined brackets, which are respectively arranged on both sides of the upper thrust rod; the upper end of each combined bracket is connected to the frame, and the lower end is hinged to one end of the two lower thrust rods, and the other ends of the two lower thrust rods are respectively connected to the lower thrust rod supports; there are four lower thrust rod supports, two of which are fixedly connected to the lower plane of the front axle, and the remaining two lower thrust rod supports are fixedly connected to the rear axle; The stabilizer bar device comprises a lateral stabilizer and a bracket, one end of the lateral stabilizer is connected to the vehicle frame through the bracket, and the other end is connected to the lower thrust rod support; there are two stabilizer bar devices, which are respectively arranged at the front side of the front axle and the rear side of the rear axle; The air spring device includes a balance beam and two air springs, both of which are installed on the upper plane of the balance beam, one of which is connected to the frame through an upper bracket, and the upper end of the other air spring is connected to the combined bracket; each combined bracket is connected to two air spring devices.

2. A double-bridge eight-airbag air suspension structure as claimed in claim 1, characterized in that: The balance beam is fixedly connected to the vehicle axle via two U-shaped bolts.

3. The double-bridge eight-airbag air suspension structure according to claim 1, characterized in that: The upper plane of the balance beam is also provided with a shock absorber connecting seat and a limit connecting seat.

4. A double-bridge eight-airbag air suspension structure as claimed in claim 3, characterized in that: A shock absorbing device is arranged on the equalizing beam, and the shock absorbing device is a double-acting cylinder shock absorber. The upper end of the shock absorber is connected to the shock absorber bracket fixed on the frame through a rubber bushing, and the lower end is hinged to the shock absorber connecting seat through a rubber bushing and a connecting pin.

5. The double-bridge eight-airbag air suspension structure as claimed in claim 3, characterized in that: A limiting device is also provided on the equalizing beam, and the limiting device is a limiting chain. The upper end of the limiting chain is connected to the frame through a limiting chain bracket, and the lower end is connected to the limiting connecting seat.

6. The double-bridge eight-airbag air suspension structure as claimed in claim 1, characterized in that: It also includes a pipeline system, which includes a height valve, a stop valve, an overflow valve and a pipeline; the height valve, the stop valve and the overflow valve are all arranged on the frame.

7. A double-bridge eight-airbag air suspension structure as claimed in claim 6, characterized in that: The air spring is connected to the height valve through a pipeline; a stop valve is arranged between the air spring and the height valve.

8. The double-bridge eight-airbag air suspension structure as claimed in claim 6, characterized in that: An inflation valve and an air release valve are arranged in the height valve.

9. A double-bridge eight-airbag air suspension structure as claimed in claim 8, characterized in that: The control rod includes a cross rod and a vertical rod, one end of the cross rod is connected to the height valve, and the other end is hinged to the top end of the vertical rod, the bottom end of the vertical rod is fixedly connected to the equalizing beam, the height valve is connected to the cross rod, and the control rod is used to control the opening and closing of the inflation valve and the deflation valve.

10. A working method of a double-bridge eight-airbag air suspension structure according to any one of claims 1 to 9, characterized in that: include: When the vehicle load is at the design value, the crossbar of the control lever is in a horizontal state, the suspension is in a balanced state, and the height value of the plane on the frame is the design value; When the load on the vehicle increases, the axle moves closer to the frame, and the hinged end of the crossbar of the control rod rises. Under the action of the crossbar of the control rod, the inflation valve opens, and compressed air enters the air spring, raising the frame and the body until the frame rises to its original height. When the load on the car decreases, the axle moves away from the frame, and the hinged end of the crossbar of the control rod moves downward. Under the action of the crossbar of the control rod, the air bleed valve opens, and the air in the air spring is discharged into the atmosphere, and the body and frame are immediately lowered to their original height.

Images