CN116619964A

CN116619964A - Lift bridge air suspension system and car

Info

Publication number: CN116619964A
Application number: CN202310783935.0A
Authority: CN
Inventors: 金鑫; 王俊杰; 范培斌; 黄志刚; 王金胜; 王江伟; 李应涛
Original assignee: Dongfeng Commercial Vehicle Co Ltd
Current assignee: Dongfeng Commercial Vehicle Co Ltd
Priority date: 2023-06-29
Filing date: 2023-06-29
Publication date: 2023-08-22

Abstract

The application discloses a lifting bridge air suspension system and an automobile, and relates to the technical field of automobile suspensions, wherein the system comprises a guide arm bracket, a guide arm and a lifting air bag assembly; the guide arm bracket is used for being arranged on the outer side surface of the frame; the front end of the guide arm is hinged with the guide arm bracket; and the lifting air bag assembly is connected with the guide arm support and the guide arm, and the projection of the lifting air bag assembly in the height direction of the automobile is positioned at the outer side of the frame. In summary, in the application, the air suspension is improved to make the lifting air bag assembly arranged on the outer side of the frame, so that the inner side of the frame is provided with enough space for arranging the transmission shaft, and the space design of the automobile by a practitioner is more flexible.

Description

Lift bridge air suspension system and car

Technical Field

The application relates to the technical field of automotive suspensions, in particular to a lifting bridge air suspension system and an automobile.

Background

Suspensions are one of the important assemblies on automobiles, which elastically connect a frame (or body) with axles (or wheels). The main task is to transmit all forces and torques acting between the wheels and the frame (or body) and to buffer the impact load transmitted to the frame (or body) from uneven road or poor vehicle conditions, attenuate the vibrations of the load-bearing system caused thereby and ensure smooth running of the vehicle. However, in the case of empty or less loaded vehicles, no more bridges are required to take charge of the load, which would cause unnecessary wear and power losses if all the tires were to land. Accordingly, many vehicle constructions employ air suspension lifters in order to reduce the amount of tire landing, friction and energy consumption when empty or loaded is small. Compared with a leaf spring suspension system mainly applied to commercial vehicles, the air suspension system can effectively improve the smoothness of the vehicles due to the characteristics of the air suspension system, and the height adjustment of the vehicles or the lifting function of the vehicle bridge can be realized through the arrangement of the mechanisms and the control of air pressure, so that the lifting bridge is lifted off the ground by the inflation of the lifting air bags of the air suspension system when the vehicles are in no-load, the tire abrasion is reduced, and the oil consumption is reduced. When the vehicle is fully loaded, the lifting air bags of the air suspension system are deflated, and the lifting bridge falls to the ground to bear, so that the trafficability and applicability of the vehicle are greatly improved.

However, due to the limited space in the frame area, the lifting bladder of the air suspension system does not have sufficient space to arrange the drive axle, which results in that neither the axle on which the air suspension is mounted nor the axle arranged behind the suspension system can act as a drive axle. Therefore, the practitioner has to arrange the air suspension on the last axle of the vehicle at the time of design, which causes trouble to the practitioner in the vehicle space arrangement process.

Disclosure of Invention

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 an axle provided with the air suspension and an axle arranged behind the suspension system cannot be used as a driving axle, so that a designer has to arrange the air suspension on the last axle of a vehicle, and the flexibility of the design of the automobile suspension is affected, the application provides a lifting axle air suspension system, which comprises the following components: the guide arm support, the guide arm and the lifting air bag assembly; wherein,,

the guide arm bracket is used for being arranged on the outer side surface of the frame;

the front end of the guide arm is hinged with the guide arm bracket;

and the lifting air bag assembly is connected with the guide arm support and the guide arm, and the projection of the lifting air bag assembly in the height direction of the automobile is positioned at the outer side of the frame.

In some embodiments, the lift bladder assembly comprises:

the lifting air bag bracket is connected with the guide arm bracket and is arranged above the guide arm at intervals;

the bottom of the lifting air bag is connected with the lifting air bag bracket;

one end of the guide arm cover plate is connected with the guide arm, and the other end of the guide arm cover plate extends towards the direction of the guide arm bracket and is connected with the top of the lifting air bag; wherein,,

and the projections of the lifting air bag bracket, the lifting air bag and the guide arm cover plate in the height direction of the automobile are all positioned on the outer side of the frame.

In some embodiments, further comprising: the shock absorber assembly comprises a shock absorber upper bracket, a shock absorber lower bracket and a shock absorber, wherein the shock absorber upper bracket is arranged on the frame, one end of the shock absorber is connected with the shock absorber upper bracket, the other end of the shock absorber is connected with the shock absorber lower bracket, and the shock absorber lower bracket is positioned below the guide arm so as to limit the downward displacement of the guide arm along the height direction.

In some embodiments, the shock absorber lower bracket is connected to the guide arm cover plate, and the shock absorber lower bracket and the guide arm cover plate are arranged at an upper-lower interval to form a limiting space for the guide arm to pass through.

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.

In some embodiments, the elastic bushing and the guide arm are in clearance fit in the Y direction of the automobile, and an inner gasket is arranged at the hinge joint between the elastic bushing and the guide arm so as to adjust the size of the clearance between the elastic bushing and the guide arm.

In some embodiments, further comprising: and one end of the bearing air bag component is connected with the frame, the other end of the bearing air bag component is connected with the guide arm, and the bearing air bag component is used for limiting the guide arm to move upwards in the height direction of the automobile.

In some embodiments, the load bearing airbag assembly includes:

the top of the bearing air bag is connected with the frame through an air bag carriage, and a limiting block is arranged in the bearing air bag;

the air bag carriage is connected with the guide arm at one end and extends into the bearing air bag at the other end, and the air bag carriage part can move up and down in the bearing air bag along the height direction of the automobile so as to be propped against or separated from the limiting block.

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

In another aspect, the present application provides an automobile comprising: a frame including an outer side; and any one of the lift bridge air suspension systems described above.

In summary, in the application, the air suspension is improved to make the lifting air bag assembly arranged on the outer side of the frame, so that the inner side of the frame is provided with enough space for arranging the transmission shaft, and the space design of the automobile by a practitioner is more flexible.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a lift bridge air suspension system in accordance with an embodiment of the present application;

FIG. 2 is a partial cross-sectional view of a lift bridge air suspension system in the Y-direction of an automobile in accordance with an embodiment of the present application;

FIG. 3 is a partial cross-sectional view of a lift bridge air suspension system in the X direction of an automobile in accordance with an embodiment of the present application;

fig. 4 is a top view of a lift bridge air suspension system in accordance with an embodiment of the present application.

In the figure: 1. a guide arm bracket; 11. an elastic bushing; 12. an inner gasket; 2. a frame; 21. an outer side surface; 3. a guide arm; 31. a fixing bolt; 4. lifting the air bag assembly; 41. lifting the airbag bracket; 42. lifting the air bag; 43. a guide arm cover plate; 5. a shock absorber assembly; 51. a shock absorber upper bracket; 52. a shock absorber lower bracket; 53. a damper; 6. a load bearing airbag assembly; 61. a load-bearing air bag; 62. an air bag carriage.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Embodiments of the present application are described in further detail below with reference to the accompanying drawings. In view of the problem in the prior art that the lifting air bag of the air suspension system does not have enough space to arrange the transmission shaft, and therefore, the axle provided with the air suspension and the axle arranged behind the suspension system cannot be used as a driving axle, so that a designer has to arrange the air suspension on the last axle of the vehicle, which affects the flexibility of the design of the automobile suspension, as shown in fig. 1, 3 and 4, the application provides a lifting axle air suspension system, which comprises: a guide arm bracket 1, a guide arm 3 and a lifting air bag assembly 4; wherein,,

the guide arm support 1 is intended to be arranged on an outer side 21 of the frame 2. The front end of the guide arm 3 is hinged with the guide arm bracket 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 height direction of the automobile is positioned on the outer side of the frame 2.

It can be understood that when the vehicle is empty, the lifting air bag is inflated to lift the lifting bridge off the ground, so that the abrasion of tires is reduced, and the oil consumption is reduced; when the vehicle is fully loaded, the lifting air bag is deflated, and the lifting bridge falls to the ground to bear. The application improves the air suspension so that the lifting air bag assembly is arranged on the outer side of the frame. While the space inside the two frames 2 can be used for the provision of a drive shaft. Therefore, the axle provided with the air suspension can be in butt joint with the transmission shaft to be designed as a driving axle, and the transmission shaft can also be arranged as the driving axle on the axle which is backwards in the X direction of the automobile.

The present application refers to an X direction being a longitudinal direction of an automobile, a Y direction being a width direction of the automobile, and a Z direction being a height direction of the automobile.

In some specific embodiments, as shown in fig. 2, the lifting airbag assembly 4 includes:

and a lifting air bag bracket 41 connected with the guide arm bracket 1, wherein the lifting air bag bracket 41 is arranged above the guide arm 3 at intervals. The bottom of the lifting air bag 42 is connected to the lifting air bag bracket 41. One end of a guide arm cover plate 43 is connected with the guide arm 3, and the other end extends towards the direction of the guide arm bracket 1 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 positioned outside the frame 2.

Further, the lift bridge air suspension system further comprises: a damper assembly 5;

the novel bicycle frame comprises a shock absorber upper support 51, a shock absorber lower support 52 and a shock absorber 53, wherein the shock absorber upper support 51 is arranged on the bicycle frame 2, one end of the shock absorber 53 is connected with the shock absorber upper support 51, the other end of the shock absorber 53 is connected with the shock absorber lower support 52, and the shock absorber lower support 52 is positioned below the guide arm 3 to limit downward displacement of the guide arm 3 in the height direction.

Preferably, the lower damper bracket 52 is connected to the guide arm cover 43, and the lower damper bracket 52 and the guide arm cover 43 are disposed at an upper and lower interval to form a limiting space through which the guide arm 3 passes.

It should be noted that, as shown in fig. 1, the lower bracket 52 of the shock absorber and the guide arm cover plate 43 are connected by a plurality of bolts, so that a hollow limit space is formed between the lower bracket and the guide arm cover plate. And one end of the lifting air bag assembly 4 is connected with the guide arm bracket 1, and the other end of the lifting air bag assembly is connected with the lower bracket 52 of the shock absorber, so that the lifting air bag assembly 4 can timely control the guide arm to ascend or descend according to the driving requirement. Meanwhile, the damper lower bracket 52

Further, as shown in fig. 2 and 3, the guide arm support 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.

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

It will be appreciated that the inner washer 12 is disposed between the guide arm 3 and the elastic bushing 11, so that the inner washer 12 limits the lateral displacement of the guide arm 3 (i.e. the coordinate Y direction of the whole vehicle), and further the lateral displacement limitation of the axle is achieved, so that the whole suspension system eliminates the lateral thrust rod connecting the frame and the axle, and the whole system does not need to be configured with a lateral stabilizer bar because the guide arm has a large anti-roll stiffness. The clearance is not too small to prevent the guide arm 3 from rotating around the bolt during lifting/lowering of the axle, and too large a lateral displacement of the guide arm relative to the guide arm bracket 1 is not caused, so that the vehicle axle is enlarged to the axle position, and the axle generates too large a lateral displacement.

Alternatively, the material of the inner washer 12 is selected to be a wear resistant material (e.g., 65 Mn).

In some embodiments, as shown in fig. 1, the end of the guide arm 3 away from the guide arm bracket 1 is provided with a bearing air bag assembly 6, one end of the bearing air bag assembly 6 is connected with the frame 2, the other end is connected with the guide arm 3, and the bearing air bag assembly 6 is used for limiting the displacement of the guide arm 3 in the height direction of the automobile.

Specifically, the load bearing airbag assembly 6 includes: a carrying balloon 61 and a balloon carriage 62; wherein,,

the top of the bearing air bag 61 is connected with the frame 2 through an air bag carriage 62, and a limiting block is arranged in the bearing air bag 61. One end of the air bag carriage 62 is connected with the guide arm 3, the other end of the air bag carriage extends into the bearing air bag 61, and the air bag carriage 62 can move up and down in the bearing air bag 61 along the height direction of the automobile so as to be propped against or separated from the limiting block.

It will be appreciated that in the process of turning the axle around the pin (bolt) of the guide arm 3, the upper limit is realized by the contact limit of the built-in limit block arranged on the bearing air bag, and the lower limit is realized by the limit of the damper assembly 5.

In some alternative embodiments, the guide arm 3 is bent downward in the height direction of the vehicle and is connected to the air bag module 6, so that the center of the air bag 61 can be arranged below the vehicle frame without a cross member.

Further, the present application provides an automotive drive axle, comprising: drive shaft and axle installed between two frames 2 are equipped with lift bridge air suspension system on two frames, lift bridge air suspension system includes: a guide arm bracket 1, a guide arm 3 and a lifting air bag assembly 4; wherein,,

In another aspect, the present application provides an automobile comprising: a frame 2 and a lift bridge air suspension system; wherein,,

the lift bridge air suspension system includes: a guide arm bracket 1, a guide arm 3 and a lifting air bag assembly 4; wherein,,

In alternative embodiments, the guide arm 3 is bent downward in the height direction of the vehicle and connected to the air bag module 6 such that the center of the air bag 61 is disposed below the vehicle frame without a cross member

In summary, in the present application, the air suspension is improved to make the lifting air bag assembly 4 installed on the outer side of the frame, so that the inner side of the frame 2 has enough space to arrange the transmission shaft, which makes the space design of the automobile more flexible for the practitioner. Further, an inner washer 12 is arranged between the guide arm 3 and the elastic bushing 11, so that the inner washer 12 limits the transverse displacement of the guide arm 3 (namely, the coordinate Y direction of the whole vehicle), and further the transverse displacement limitation of the vehicle axle is realized, the transverse thrust rod connecting the vehicle frame and the vehicle axle is omitted from the whole suspension system, and the transverse stabilizer rod is not required to be configured in the whole system because the guide arm has larger anti-roll rigidity.

In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present application and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

It should be noted that in the present application, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is only a specific embodiment of the application to enable those skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lift bridge air suspension system comprising:

the guide arm bracket (1) is used for being arranged on the outer side surface (21) of the frame (2);

the front end of the guide arm (3) is hinged with the guide arm bracket (1);

and 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 height direction of the automobile is positioned at the outer side of the frame (2).

2. A lift bridge air suspension system according to claim 1, wherein said lift air bag assembly (4) comprises:

a lifting air bag bracket (41) connected with the guide arm bracket (1), wherein the lifting air bag bracket (41) is arranged above the guide arm (3) at intervals;

a lifting air bag (42), the bottom of which is connected with the lifting air bag bracket (41);

one end of the guide arm cover plate (43) is connected with the guide arm (3), and the other end of the guide arm cover plate extends towards the direction of the guide arm bracket (1) 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 positioned on the outer side of the frame (2).

3. The lift bridge air suspension system of claim 2 further comprising: the shock absorber subassembly (5), it includes bumper shock absorber upper bracket (51), bumper shock absorber lower carriage (52) and bumper shock absorber (53), bumper shock absorber upper bracket (51) are located on frame (2), bumper shock absorber (53) one end with bumper shock absorber upper bracket (51) links to each other, the other end with bumper shock absorber lower carriage (52) link to each other, bumper shock absorber lower carriage (52) are located guide arm (3) below in order to restrict guide arm (3) follow the decurrent displacement of direction of height.

4. A lift bridge air suspension system as claimed in claim 3 wherein: the shock absorber lower support (52) is connected with the guide arm cover plate (43), and the shock absorber lower support (52) and the guide arm cover plate (43) are arranged at intervals up and down to form a limiting space for the guide arm (3) to pass through.

5. The lift bridge air suspension system of claim 1 wherein: an elastic bushing (11) is arranged on the guide arm support (1), and the front end of the guide arm (3) is hinged with the elastic bushing (11) through a fixing bolt (31).

6. The lift bridge air suspension system of claim 5 wherein: the elastic bushing (11) is in clearance fit with the guide arm (3) in the Y direction of the automobile, and an inner gasket (12) is arranged at the joint between the elastic bushing (11) and the guide arm (3) so as to adjust the size of the clearance between the elastic bushing (11) and the guide arm (3).

7. The lift bridge air suspension system of claim 1 further comprising: and one end of the bearing air bag component (6) is connected with the frame (2), the other end of the bearing air bag component is connected with the guide arm (3), and the bearing air bag component (6) is used for limiting the guide arm (3) to displace upwards in the height direction of the automobile.

8. A lift bridge air suspension system according to claim 7 wherein said load bearing air bag assembly (6) comprises:

the top of the bearing air bag (61) is connected with the frame (2) through an air bag carriage (62), and a limiting block is arranged in the bearing air bag (61);

and one end of the air bag carriage (62) is connected with the guide arm (3), the other end of the air bag carriage extends into the bearing air bag (61), and the air bag carriage (62) can move up and down in the bearing air bag (61) along the height direction of the automobile so as to be propped against or separated from the limiting block.

9. The lift bridge air suspension system of claim 7 wherein: the guide arm (3) is bent downwards in the height direction of the automobile and is connected with the bearing air bag assembly (6).

10. An automobile, comprising:

a frame (2) comprising an outer side (21); and

a lift bridge air suspension system according to any one of claims 1-9.