Lifting bridge air suspension system and automobile

Abstract

The application discloses a lifting bridge air suspension system and a car, and relates to the technical field of automobile suspensions, and the system comprises a guide arm support, a guide arm and a lifting air bag assembly; wherein the guide arm support is arranged on the outer side of a vehicle frame; the guide arm is hingedly connected to the front end of the guide arm support; the lifting air bag assembly is connected to the guide arm support and the guide arm, and the projection of the lifting air bag assembly in the height direction of the car is located on the outer side of the vehicle frame. In conclusion, the air suspension is improved in the application, so that the lifting air bag assembly is arranged on the outer side of the vehicle frame, and thus there is enough space on the inner side of the vehicle frame to arrange a transmission shaft, so that the space design of the car is more flexible.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile suspension, in particular to a lifting bridge air suspension system and a vehicle. BACKGROUND

[0002] Suspension is one of the important assemblies on the automobile, which elastically connects the vehicle frame (or vehicle body) and the axle (or wheel) together. Its main task is to transmit all the forces and torques between the wheels and the frame (or body), and to buffer the impact load caused by uneven road or poor vehicle conditions, and to attenuate the vibration of the bearing system caused thereby, and to ensure the smooth driving of the automobile. However, in the case of empty load or small load, more bridges are not needed to bear the load, and at this time, if all the tires are in contact with the ground, it will cause unnecessary wear and power loss. Therefore, in order to reduce the number of tire grounding, reduce friction and reduce energy consumption when the vehicle is empty or has a small load, many vehicle structures use air suspension lifting devices. Compared with the steel plate spring suspension system commonly used in commercial vehicles, the air suspension system can effectively improve the smoothness of the vehicle, and through the arrangement of the mechanism combined with the control of the air pressure, the height adjustment of the vehicle or the lifting function of the axle can be realized. When the vehicle is empty, the lifting air bag of the air suspension system is inflated to lift the bridge off the ground, reducing tire wear and reducing fuel consumption. When the vehicle is fully loaded, the lifting air bag of the air suspension system is deflated, and the lifting bridge falls to the ground to bear the load, greatly improving the passability and applicability of the vehicle.

[0003] However, due to the limited space in the frame area, the lifting air bag of the air suspension system does not have enough space to arrange the transmission shaft, which results in that the axle arranged behind the air suspension and the suspension system cannot be used as a drive axle. Therefore, the designers have to arrange the air suspension on the last axle of the vehicle, which causes difficulties in the spatial arrangement of the vehicle. SUMMARY

[0004] In view of the problem that the lifting air bag of the air suspension system in the prior art does not have enough space to arrange the transmission shaft, which results in that the axle arranged behind the air suspension and the suspension system cannot be used as a drive axle, and the designers have to arrange the air suspension on the last axle of the vehicle, affecting the flexibility of the automobile suspension design, the present application provides a lifting bridge air suspension system, which comprises a guide arm support, a guide arm and a lifting air bag assembly; wherein,

[0005] The guide arm support is arranged on the outer side of the frame.

[0006] The guide arm is hingedly connected to the guide arm support at the front end.

[0007] A lifting air bag assembly is connected with the guide arm support and the guide arm, and a projection of the lifting air bag assembly in the height direction of the vehicle is located outside the vehicle frame.

[0008] In some embodiments, the lifting air bag assembly comprises:

[0009] A lifting air bag bracket is connected with the guide arm support, and the lifting air bag bracket is arranged above the guide arm in a spaced manner;

[0010] A lifting air bag is connected with the lifting air bag bracket at the bottom;

[0011] A guide arm cover plate is connected with the guide arm at one end, and extends to the guide arm support at the other end and is connected with the top of the lifting air bag; wherein,

[0012] The projections of the lifting air bag bracket, the lifting air bag and the guide arm cover plate in the height direction of the vehicle are all located outside the vehicle frame.

[0013] In some embodiments, further comprising: a shock absorber assembly comprising a shock absorber upper support, a shock absorber lower support and a shock absorber, the shock absorber upper support is arranged on the vehicle frame, one end of the shock absorber is connected with the shock absorber upper support, the other end is connected with the shock absorber lower support, and the shock absorber lower support is located below the guide arm to limit the downward displacement of the guide arm in the height direction.

[0014] In some embodiments, the shock absorber lower support is connected with the guide arm cover plate, and the shock absorber lower support and the guide arm cover plate are arranged in a spaced manner to form a limiting space for the guide arm to pass through.

[0015] In some embodiments, an elastic bushing is arranged on the guide arm support, and the front end of the guide arm is hinged with the elastic bushing through a fixing bolt.

[0016] In some embodiments, the elastic bushing and the guide arm are in clearance fit in the Y direction of the vehicle, and an inner gasket is arranged at the hinge between the elastic bushing and the guide arm to adjust the clearance size between the elastic bushing and the guide arm.

[0017] In some embodiments, further comprising: a bearing air bag assembly connected with the vehicle frame at one end and connected with the guide arm at the other end, the bearing air bag assembly is used to limit the upward displacement of the guide arm in the height direction of the vehicle.

[0018] In some embodiments, the bearing air bag assembly comprises:

[0019] A bearing air bag is connected with the vehicle frame at the top through an air bag drag plate, and a limiting block is arranged in the bearing air bag.

[0020] An air bag drag plate is connected to the guide arm at one end and extends into the load bearing air bag at the other end, and the air bag drag plate part is movable up and down in the height direction of the vehicle in the load bearing air bag to abut against or separate from the limiting block.

[0021] In some embodiments, the guide arm is bent downward in the height direction of the vehicle and connected to the load bearing air bag assembly.

[0022] In another aspect, the application provides a vehicle comprising a vehicle frame comprising an outer side and any of the lift axle air suspension systems described above.

[0023] In summary, the air suspension is improved in the application so that the lift air bag assembly is installed on the outer side of the vehicle frame, thereby leaving sufficient space on the inner side of the vehicle frame for arranging the drive shaft, and making the space design of the vehicle more flexible for the practitioner. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort.

[0025] Figure 1 FIG. 1 is a structural schematic diagram of a lift axle air suspension system in an embodiment of the application;

[0026] Figure 2 FIG. 2 is a partial sectional view of the lift axle air suspension system in the Y direction of the vehicle in an embodiment of the application;

[0027] Figure 3 FIG. 3 is a partial sectional view of the lift axle air suspension system in the X direction of the vehicle in an embodiment of the application;

[0028] Figure 4 FIG. 4 is a top view of the lift axle air suspension system in an embodiment of the application.

[0029] In the drawings: 1, guide arm support; 11, elastic bushing; 12, inner washer; 2, vehicle frame; 21, outer side; 3, guide arm; 31, fixing bolt; 4, lift air bag assembly; 41, lift air bag bracket; 42, lift air bag; 43, guide arm cover plate; 5, shock absorber assembly; 51, upper shock absorber support; 52, lower shock absorber support; 53, shock absorber; 6, load bearing air bag assembly; 61, load bearing air bag; 62, air bag drag plate. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0031] The embodiments of the present application are further described below in detail with reference to the drawings. In order to solve the problem that the lifting air bag of the air suspension system in the prior art does not have enough space to arrange a transmission shaft, so that the axle arranged behind the air suspension and the suspension system cannot be used as a drive axle, and the designer has to arrange the air suspension on the last axle of the vehicle, affecting the flexibility of the automobile suspension design, the present application provides a lifting axle air suspension system, as shown in Figure 1 、 Figure 3 and Figure 4 , the present application provides a lifting axle air suspension system, which comprises a guide arm support 1, a guide arm 3 and a lifting air bag assembly 4, wherein,

[0032] The guide arm support 1 is arranged on the outer side 21 of the vehicle frame 2. The front end of the guide arm 3 is hinged to the guide arm support 1. The lifting air bag assembly 4 is connected to the guide arm support 1 and the guide arm 3, and the projection of the lifting air bag assembly 4 in the height direction of the vehicle is located on the outer side of the vehicle frame 2.

[0033] It can be understood that when the vehicle is empty, the inflation of the lifting air bag will lift the lifting axle off the ground, reducing tire wear and reducing fuel consumption; when the vehicle is fully loaded, the lifting air bag is deflated, and the lifting axle falls to the ground to bear the load. The present application improves the air suspension to arrange the lifting air bag assembly on the outer side of the vehicle frame. The space on the inner side of the two vehicle frames 2 can be used to arrange the transmission shaft. In this way, the axle provided with the air suspension can be connected to the transmission shaft to be designed as a drive axle, and the axle on the rear side of the vehicle in the X direction can also be provided with a transmission shaft as a drive axle. The designer has more flexible design and higher universality when using the suspension device of the present application.

[0034] It should be noted that the X direction mentioned in the present application is the length direction of the vehicle, the Y direction is the width direction of the vehicle, and the Z direction is the height direction of the vehicle.

[0035] In some specific embodiments, as shown in Figure 2 , the lifting air bag assembly 4 comprises:

[0036] A lifting air bag bracket 41 is connected with the guide arm support 1, and the lifting air bag bracket 41 is arranged above the guide arm 3 at intervals. A lifting air bag 42 is connected with the lifting air bag bracket 41 at the bottom. A guide arm cover plate 43 is connected with the guide arm 3 at one end, and extends to the guide arm support 1 at the other end and is connected with the top of the lifting air bag 42; wherein the projections of the lifting air bag bracket 41, the lifting air bag 42 and the guide arm cover plate 43 in the height direction of the automobile are all located outside the vehicle frame 2.

[0037] Further, the lifting bridge air suspension system further comprises a shock absorber assembly 5.

[0038] The shock absorber assembly 5 comprises a shock absorber upper support 51, a shock absorber lower support 52 and a shock absorber 53. The shock absorber upper support 51 is arranged on the vehicle frame 2. One end of the shock absorber 53 is connected with the shock absorber upper support 51, and the other end is connected with the shock absorber lower support 52. The shock absorber lower support 52 is arranged below the guide arm 3 to limit the downward displacement of the guide arm 3 in the height direction.

[0039] Preferably, the shock absorber lower support 52 and the guide arm cover plate 43 are connected, and the shock absorber lower support 52 and the guide arm cover plate 43 are arranged at intervals in the up-down direction to form a limiting space for the guide arm 3 to pass through.

[0040] It should be noted that, as shown in Figure 1 The shock absorber lower support 52 and the guide arm cover plate 43 are connected by a plurality of bolts, so that the gap between them becomes a hollow limiting space. One end of the lifting air bag assembly 4 is connected with the guide arm support 1, and the other end is connected with the shock absorber lower support 52, so that the lifting air bag assembly 4 can timely control the upward or downward movement of the guide arm according to the driving needs. At the same time, the shock absorber lower support 52

[0041] Further, as shown in Figure 2 and Figure 3 The guide arm support 1 is provided with an elastic bushing 11, and the front end of the guide arm 3 is hinged with the elastic bushing 11 through a fixing bolt 31.

[0042] Specifically, the elastic bushing 11 is clearance-fitted with the guide arm 3 in the Y direction of the automobile, and an inner gasket 12 is arranged at the hinge between the elastic bushing 11 and the guide arm 3 to adjust the clearance size between the elastic bushing 11 and the guide arm 3.

[0043] It can be understood that the inner gasket 12 is arranged between the guide arm 3 and the elastic bushing 11, so that the inner gasket 12 limits the lateral displacement of the guide arm 3, thereby realizing the lateral displacement limitation of the axle, and thus the lateral thrust rod connecting the vehicle frame and the axle is cancelled in the entire suspension system, and the lateral stabilizer is also not required in the entire system due to the large roll stiffness of the guide arm. It should be noted that the above gap is not too small to hinder the rotation of the guide arm 3 around the bolt during the lifting / descending process of the axle, and is not too large to cause excessive lateral displacement of the guide arm relative to the guide arm support 1, which is amplified to the axle and causes excessive lateral displacement of the axle.

[0044] Optionally, the material of the inner gasket 12 is selected as wear-resistant material (for example, 65Mn).

[0045] In some embodiments, as shown in Figure 1 The end of the guide arm 3 away from the guide arm support 1 is provided with a load air bag assembly 6, one end of the load air bag assembly 6 is connected with the vehicle frame 2, and the other end is connected with the guide arm 3, and the load air bag assembly 6 is used to limit the upward displacement of the guide arm 3 in the height direction of the vehicle.

[0046] Specifically, the load air bag assembly 6 comprises a load air bag 61 and an air bag drag plate 62; wherein,

[0047] The top of the load air bag 61 is connected with the vehicle frame 2 through the air bag drag plate 62, and a limiting block is arranged in the load air bag 61. One end of the air bag drag plate 62 is connected with the guide arm 3, and the other end extends into the load air bag 61, and part of the air bag drag plate 62 can move up and down in the load air bag 61 in the height direction of the vehicle to abut against or separate from the limiting block.

[0048] It can be understood that, in the process of rotating the axle around the pin shaft (bolt) of the guide arm 3, the upper limit is realized by the built-in limiting block arranged in the load air bag, and the lower limit is realized by the shock absorber assembly 5.

[0049] In some optional embodiments, the guide arm 3 is bent downward in the height direction of the vehicle and connected with the load air bag assembly 6, so that the center of the load air bag 61 can be arranged below the vehicle frame without a cross beam.

[0050] Further, the application provides an automobile drive axle, which comprises a drive shaft and an axle mounted between two vehicle frames 2, and the two vehicle frames are provided with a lifting axle air suspension system, the lifting axle air suspension system comprises a guide arm support 1, a guide arm 3 and a lifting air bag assembly 4; wherein,

[0051] The guiding arm support 1 is arranged on the outer side 21 of the vehicle frame 2. The guiding arm 3 is hinged to the guiding arm support 1. The lifting air bag assembly 4 is connected to the guiding arm support 1 and the guiding arm 3, and the projection of the lifting air bag assembly 4 in the height direction of the vehicle is located on the outer side of the vehicle frame 2.

[0052] It can be understood that when the vehicle is empty, the inflation of the lifting air bag will lift the lifting bridge off the ground, reducing tire wear and fuel consumption; when the vehicle is fully loaded, the lifting air bag is deflated, and the lifting bridge falls to the ground to bear the load. The air suspension is improved in the application, so that the lifting air bag assembly is arranged on the outer side of the vehicle frame. The space on the inner side of the two vehicle frames 2 can be used to arrange the transmission shaft. In this way, the vehicle bridge equipped with the air suspension can be connected with the transmission shaft to be designed as a drive axle, and the vehicle bridge in the X direction of the vehicle can also be provided with a transmission shaft as a drive axle. The design is more flexible and has higher universality when the suspension device of the application is used.

[0053] In some specific embodiments, as shown in Figure 2 The lifting air bag assembly 4 comprises:

[0054] The lifting air bag bracket 41 is connected to the guiding arm support 1, and the lifting air bag bracket 41 is arranged above the guiding arm 3. The bottom of the lifting air bag 42 is connected to the lifting air bag bracket 41. One end of the guiding arm cover plate 43 is connected to the guiding arm 3, and the other end extends to the guiding arm support 1 and is connected to the top of the lifting air bag 42; wherein the projections of the lifting air bag bracket 41, the lifting air bag 42 and the guiding arm cover plate 43 in the height direction of the vehicle are all located on the outer side of the vehicle frame 2.

[0055] Further, the lifting bridge air suspension system further comprises a shock absorber assembly 5.

[0056] The shock absorber assembly 5 comprises a shock absorber upper support 51, a shock absorber lower support 52 and a shock absorber 53. The shock absorber upper support 51 is arranged on the vehicle frame 2. One end of the shock absorber 53 is connected to the shock absorber upper support 51, and the other end is connected to the shock absorber lower support 52. The shock absorber lower support 52 is located below the guiding arm 3 to limit the downward displacement of the guiding arm 3 in the height direction.

[0057] Preferably, the shock absorber lower support 52 is connected to the guiding arm cover plate 43, and the shock absorber lower support 52 and the guiding arm cover plate 43 are arranged in a spaced manner to form a limiting space for the guiding arm 3 to pass through.

[0058] It should be noted that, as Figure 1As shown, the shock absorber lower bracket 52 and the guide arm cover plate 43 are connected by multiple bolts, so that the gap between the two becomes a hollow limiting space. The lifting air bag assembly 4 is connected to the guide arm bracket 1 at one end and to the shock absorber lower bracket 52 at the other end, so that the lifting air bag assembly 4 can timely control the guide arm to rise or fall according to the driving needs. At the same time, the shock absorber lower bracket 52

[0059] Further, as shown in Figure 2 and Figure 3 , the guide arm bracket 1 is provided with an elastic bushing 11, and the front end of the guide arm 3 is hinged to the elastic bushing 11 through a fixing bolt 31.

[0060] Specifically, the elastic bushing 11 is clearance-fitted with the guide arm 3 in the Y direction of the vehicle, and an inner washer 12 is arranged at the hinge between the elastic bushing 11 and the guide arm 3 to adjust the gap size between the elastic bushing 11 and the guide arm 3.

[0061] It can be understood that the inner washer 12 is arranged between the guide arm 3 and the elastic bushing 11, so that the inner washer 12 limits the lateral displacement (i.e. the Y direction of the vehicle) of the guide arm 3, thereby realizing the lateral displacement limitation of the axle, and thus the lateral thrust rod connecting the vehicle frame and the axle is cancelled in the entire suspension system, and the lateral stabilizer is also not required to be configured in the entire system due to the large roll stiffness of the guide arm. It should be noted that the above gap is neither too small to hinder the guide arm 3 from rotating around the bolt during the lifting / descending process of the axle, nor too large to cause excessive lateral displacement of the guide arm relative to the guide arm bracket 1, which is then amplified to the axle to cause excessive lateral displacement of the axle.

[0062] Optionally, the material of the inner washer 12 is selected to be wear-resistant material (such as 65Mn).

[0063] In some embodiments, as shown in Figure 1 , the end of the guide arm 3 away from the guide arm bracket 1 is provided with a load air bag assembly 6, one end of which is connected to the vehicle frame 2 and the other end of which is connected to the guide arm 3, and the load air bag assembly 6 is used to limit the upward displacement of the guide arm 3 in the height direction of the vehicle.

[0064] Specifically, the load air bag assembly 6 includes a load air bag 61 and an air bag drag plate 62, wherein

[0065] The top of the load air bag 61 is connected to the vehicle frame 2 through the air bag drag plate 62, and a limiting block is arranged in the load air bag 61. One end of the air bag drag plate 62 is connected to the guide arm 3, and the other end extends into the load air bag 61, and part of the air bag drag plate 62 can move up and down in the load air bag 61 in the height direction of the vehicle to abut against or separate from the limiting block.

[0066] It can be understood that, in the process of the axle rotating around the pin shaft (bolt) of the guide arm 3, the upper limit is achieved by the built-in limiting block arranged on the load air bag, and the lower limit is achieved by the shock absorber assembly 5.

[0067] In some optional embodiments, the guide arm 3 is bent downward in the vehicle height direction and connected with the load air bag assembly 6, so that the center of the load air bag 61 can be arranged below the vehicle frame without a cross beam.

[0068] In another aspect, the application provides an automobile, which comprises a vehicle frame 2 and a lifting axle air suspension system; wherein,

[0069] The lifting axle air suspension system comprises a guide arm support 1, a guide arm 3 and a lifting air bag assembly 4; wherein,

[0070] The guide arm support 1 is arranged on the outer side 21 of the vehicle frame 2. The front end of the guide arm 3 is hinged to the guide arm support 1. The lifting air bag assembly 4 is connected with the guide arm support 1 and the guide arm 3, and the projection of the lifting air bag assembly 4 in the vehicle height direction is located on the outer side of the vehicle frame 2.

[0071] It can be understood that, when the vehicle is empty, the lifting of the lifting air bag will lift the axle off the ground, reduce tire wear and reduce fuel consumption; when the vehicle is fully loaded, the lifting air bag will deflate and the axle will fall to the ground for loading. The air suspension is improved in the application to install the lifting air bag assembly on the outer side of the vehicle frame. The space on the inner side of the two vehicle frames 2 can be used to set the transmission shaft. In this way, the axle with the air suspension can be connected with the transmission shaft to be designed as a drive axle, and the axle on the rear side of the vehicle in the X direction can also be provided with a transmission shaft as a drive axle. The design is more flexible and has higher universality when the suspension device of the application is used.

[0072] In some specific embodiments, as shown in Figure 2 The lifting air bag assembly 4 comprises:

[0073] A lifting air bag bracket 41 is connected with the guide arm support 1, and the lifting air bag bracket 41 is arranged above the guide arm 3. The bottom of a lifting air bag 42 is connected with the lifting air bag bracket 41. A guide arm cover plate 43 is connected with the guide arm 3 at one end and extends to the guide arm support 1 at the other end and is connected with the top of the lifting air bag 42; wherein, the projections of the lifting air bag bracket 41, the lifting air bag 42 and the guide arm cover plate 43 in the vehicle height direction are all located on the outer side of the vehicle frame 2.

[0074] Further, the lifting axle air suspension system further comprises a shock absorber assembly 5;

[0075] The shock absorber upper support 51 is arranged on the vehicle frame 2, the shock absorber 53 is connected to the shock absorber upper support 51 at one end and connected to the shock absorber lower support 52 at the other end, and the shock absorber lower support 52 is arranged below the guide arm 3 to limit the downward displacement of the guide arm 3 along the height direction.

[0076] Preferably, the shock absorber lower support 52 is connected to the guide arm cover plate 43, and the shock absorber lower support 52 and the guide arm cover plate 43 are arranged in a spaced-apart manner to form a limiting space for the guide arm 3 to pass through.

[0077] It should be noted that, as shown in Figure 1 , the shock absorber lower support 52 and the guide arm cover plate 43 are connected by a plurality of bolts, so that the gap between the two becomes a hollow limiting space. The lifting air bag assembly 4 is connected to the guide arm support 1 at one end and to the shock absorber lower support 52 at the other end, so that the lifting air bag assembly 4 can timely control the upward or downward movement of the guide arm according to the driving needs. At the same time, the shock absorber lower support 52

[0078] Further, as shown in Figure 2 and Figure 3 , the guide arm support 1 is provided with an elastic bushing 11, and the front end of the guide arm 3 is hingedly connected to the elastic bushing 11 by a fixing bolt 31.

[0079] Specifically, the elastic bushing 11 is clearance-fitted with the guide arm 3 in the Y direction of the vehicle, and an inner washer 12 is arranged at the hinge between the elastic bushing 11 and the guide arm 3 to adjust the clearance between the elastic bushing 11 and the guide arm 3.

[0080] It can be understood that the inner washer 12 is arranged between the guide arm 3 and the elastic bushing 11, so that the inner washer 12 limits the lateral displacement (i.e., the Y direction of the vehicle) of the guide arm 3, thereby achieving the lateral displacement limitation of the axle. Therefore, the entire suspension system cancels the lateral thrust rod connecting the vehicle frame and the axle, and because the guide arm has a large roll stiffness, the entire system also does not need to be equipped with a lateral stabilizer. It should be noted that the above clearance is not too small to hinder the rotation of the guide arm 3 around the bolt during the lifting / descending process of the axle, nor is it too large to cause excessive lateral displacement of the guide arm relative to the guide arm support 1, which is amplified to the axle and causes excessive lateral displacement of the axle.

[0081] Optionally, the material of the inner washer 12 is selected to be wear-resistant (e.g., 65Mn).

[0082] In some embodiments, as shown in Figure 1As shown, the end of the guide arm 3 away from the guide arm support 1 is provided with a bearing air bag assembly 6, one end of which is connected with the vehicle frame 2 and the other end is connected with the guide arm 3, and the bearing air bag assembly 6 is used to limit the upward displacement of the guide arm 3 in the height direction of the vehicle.

[0083] Specifically, the bearing air bag assembly 6 comprises: a bearing air bag 61 and an air bag drag plate 62; wherein,

[0084] The top of the bearing air bag 61 is connected with the vehicle frame 2 through the air bag drag plate 62, and the bearing air bag 61 is provided with a limiting block. One end of the air bag drag plate 62 is connected with the guide arm 3, and the other end extends into the bearing air bag 61, and part of the air bag drag plate 62 can move up and down in the bearing air bag 61 in the height direction of the vehicle to abut or separate from the limiting block.

[0085] It can be understood that in the process of rotating the axle around the pin shaft (bolt) of the guide arm 3, the upper limit is achieved by the built-in limiting block arranged in the bearing air bag, and the lower limit is achieved by the shock absorber assembly 5.

[0086] In some optional embodiments, the guide arm 3 is bent downward in the height direction of the vehicle and connected with the bearing air bag assembly 6, so that the center of the bearing air bag 61 can be arranged below the vehicle frame without a cross beam

[0087] In summary, in the present application, the air suspension is improved, so that the lifting air bag assembly 4 is installed on the outer side of the vehicle frame, thereby causing sufficient space on the inner side of the vehicle frame 2 to arrange the transmission shaft, so that the space design of the vehicle is more flexible for the practitioner. Further, the inner gasket 12 is arranged between the guide arm 3 and the elastic bushing 11, so that the inner gasket 12 limits the lateral (i.e. the Y direction of the whole vehicle) displacement of the guide arm 3, thereby realizing the lateral displacement limitation of the axle, so that the lateral thrust rod connecting the vehicle frame and the axle is cancelled in the whole suspension system, and because the guide arm has a large anti-roll stiffness, the whole system also does not need to be configured with a lateral stabilizer.

[0088] In the description of the present application, it should be noted that the terms "upper", "lower", and the like are used for indicating the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0089] It should be noted that in the present application, relational terms such as "first" and "second", and the like are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus including a series of elements includes not only those elements, but also other elements not explicitly listed, or other elements inherent in such a process, method, article or apparatus. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of other identical elements in the process, method, article or apparatus including the element.

[0090] The above is only a specific embodiment of the present application, which enables those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. A lift-bridge air suspension system, characterized in that The utility model relates to a kind of vehicle height adjustment device, including: Guiding arm support (1) for being arranged on the outer side (21) of frame (2); Guiding arm (3) is hinged with the front end of the guiding arm support (1); Lifting air bag assembly (4) is connected with the guiding arm support (1) and guiding arm (3), and the projection of the lifting air bag assembly (4) in the height direction of car is located the outer side of frame (2); The lifting air bag assembly (4) includes: Lifting air bag bracket (41) is connected with the guiding arm support (1), and the lifting air bag bracket (41) is spaced apart and arranged above the guiding arm (3); Lifting air bag (42) is connected with the bottom of the lifting air bag bracket (41); Guiding arm cover plate (43) is connected with the guiding arm (3) in one end, and the other end stretches along the direction of guiding arm support (1) and is connected with the top of the lifting air bag (42);Wherein, The projection of the lifting air bag bracket (41), lifting air bag (42) and guiding arm cover plate (43) in the height direction of car is located the outer side of frame (2); Shock absorber assembly (5) includes shock absorber upper support (51), shock absorber lower support (52) and shock absorber (53), and the shock absorber upper support (51) is arranged on the frame (2), and the shock absorber (53) is connected with the shock absorber upper support (51) in one end, and is connected with the shock absorber lower support (52) in the other end, and the shock absorber lower support (52) is located below the guiding arm (3) to limit the displacement of the guiding arm (3) along the height direction downwards; The shock absorber lower support (52) is connected with the guiding arm cover plate (43), and the shock absorber lower support (52) and the guiding arm cover plate (43) are spaced apart to form a limiting space for the guiding arm (3) to pass through.

2. The lift bridge air suspension system of claim 1, wherein: The guiding arm support (1) is provided with elastic bushing (11), and the front end of the guiding arm (3) is hinged with the elastic bushing (11) through fixed bolt (31).

3. The lift bridge air suspension system of claim 2, wherein: The elastic bushing (11) and the guiding arm (3) are clearance fit in the Y direction of the car, and inner washer (12) is arranged between the elastic bushing (11) and the guiding arm (3) to adjust the gap size between the elastic bushing (11) and the guiding arm (3).

4. The lift bridge air suspension system of claim 1, wherein, Further including: Bearing air bag assembly (6) is connected with the frame (2) in one end, and is connected with the guiding arm (3) in the other end, and the bearing air bag assembly (6) is used to limit the displacement of the guiding arm (3) in the height direction of car upwards.

5. The lift bridge air suspension system of claim 4, wherein, The bearing air bag assembly (6) includes: Bearing air bag (61) is connected with the frame (2) through air bag drag plate (62) in top, and the bearing air bag (61) is provided with limiting block inside; Air bag drag plate (62) is connected with the guiding arm (3) in one end, and the other end extends into the bearing air bag (61), and part of the air bag drag plate (62) can move up and down in the bearing air bag (61) in the height direction of the car to abut or separate with the limiting block.

6. The lift axle air suspension system of claim 4, wherein: The guide arm (3) is bent downward in the vehicle height direction and connected to the load airbag assembly (6).

7. An automobile characterized by comprising: Comprising: A vehicle frame (2) comprising an outer side (21); And A lift bridge air suspension system as claimed in any one of claims 1-6.

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