阅读说明：本技术 一种空气悬架 (Air suspension ) 是由 祝洪滨 许长贺 王莉 柳超 吴晓涛 于 2020-07-28 设计创作，主要内容包括：本发明属于汽车技术领域,公开了一种空气悬架。该空气悬架包括：车架和横梁,横梁设置于车架的内部,车架用于安装鞍座；驱动桥,其位于车架的下方；悬架支架,其设置于车架的底部；托臂,其位于车架的下方并连接于驱动桥；空气弹簧组件,其一端连接于车架,另一端连接于托臂；第一连杆,其一端转动连接于托臂,另一端转动连接于悬架支架；第二连杆的一端通过桥上支架连接于驱动桥的顶部,另一端转动连接于车架,桥上支架为扁平状结构；第一连杆和第二连杆的数量均为两个,两个第一连杆和两个第二连杆形成四连杆机构,两个第二连杆呈V形结构布置。该空气悬架提供足够的空间,提高了货厢的容积。(The invention belongs to the technical field of automobiles and discloses an air suspension. The air suspension includes: the cross beam is arranged inside the frame, and the frame is used for mounting a saddle; the drive axle is positioned below the frame; a suspension bracket provided at the bottom of the vehicle frame; the bracket arm is positioned below the frame and connected to the drive axle; one end of the air spring assembly is connected to the frame, and the other end of the air spring assembly is connected to the support arm; one end of the first connecting rod is rotatably connected to the supporting arm, and the other end of the first connecting rod is rotatably connected to the suspension bracket; one end of the second connecting rod is connected to the top of the drive axle through an upper bridge support, the other end of the second connecting rod is rotatably connected to the frame, and the upper bridge support is of a flat structure; the number of the first connecting rods and the number of the second connecting rods are two, the two first connecting rods and the two second connecting rods form a four-bar linkage, and the two second connecting rods are arranged in a V-shaped structure. The air suspension provides sufficient space to increase the volume of the cargo compartment.)

1. An air suspension, comprising:

the bicycle comprises a frame (1) and a cross beam (2), wherein the cross beam (2) is arranged inside the frame (1), and the frame (1) is used for mounting a saddle;

a drive axle (3) located below the frame (1);

a suspension bracket (4) which is arranged at the bottom of the frame (1) and is positioned in front of the drive axle (3);

a trailing arm (5) located below the frame (1) and connected to the transaxle (3);

an air spring assembly (6) having one end connected to the frame (1) and the other end connected to the support arm (5);

a first connecting rod (7) with one end rotatably connected to the supporting arm (5) and the other end rotatably connected to the suspension bracket (4),

the second connecting rod (8) is positioned above the first connecting rod (7), one end of the second connecting rod (8) is connected to the top of the drive axle (3) through an upper bridge support (9), the other end of the second connecting rod is rotatably connected to the cross beam (2), and the upper bridge support (9) is of a flat structure;

the number of the first connecting rods (7) and the second connecting rods (8) is two, the first connecting rods (7) and the second connecting rods (8) form a four-bar mechanism, the second connecting rods (8) are arranged in a V-shaped structure, and the large opening end of the V-shaped structure faces the cross beam (2).

2. Air suspension according to claim 1, characterized in that both ends of the first link (7) and both ends of the second link (8) are provided with rubber bushings having a stiffness less than a preset stiffness, each of said rubber bushings having an initial preset angle, making the saddle height of the saddle adjustable to 900 mm.

3. The air suspension according to claim 1, further comprising an adapter seat (17), the air spring assembly (6) being arranged on the trailing arm (5) by means of the adapter seat (17).

4. Air suspension according to claim 3, characterized in that a first mounting plane (01) is formed between the trailing arm (5) and the adapter (17), and a second mounting plane (02) is formed between the trailing arm (5) and the drive axle (3), the first mounting plane (01) having a lower height than the second mounting plane (02).

5. Air suspension according to claim 1, characterized in that a first connection opening (51) is provided at the side of the trailing arm (5) remote from the vehicle frame (1), the first connection opening (51) being rotatably connected to the first connecting rod (7), the height of the first connection opening (51) being higher than a predetermined height.

6. The air suspension according to claim 1, further comprising a shock absorber (11), wherein the shock absorber (11) is located in front of the transaxle (3), one end of the shock absorber (11) is connected to the frame (1) through a shock-absorbing bracket (12), and the other end is disposed on the trailing arm (5).

7. Air suspension according to claim 6, characterised in that a second connection opening (52) is provided on the side of the trailing arm (5) which is adjacent to the vehicle frame (1), said second connection opening (52) being connected to the shock absorber (11).

8. Air suspension according to claim 1, further comprising a stabilizer bar (13), said stabilizer bar (13) being connected at one end to said trailing arm (5) and at the other end to said frame (1) by means of a suspension arm (14).

9. Air suspension according to claim 1, characterized in that the air spring assembly (6) comprises a first air spring (61) and a second air spring (62), the distance between the first air spring (61) and the centre of the drive axle (3) being La, the distance between the second air spring (62) and the centre of the drive axle (3) being Lb, wherein Lb/La is 1.15-1.25.

10. Air suspension according to claim 1, characterized in that the vehicle frame (1) is provided with a receiving groove on the side close to the drive axle (3), said receiving groove being intended to partially receive the drive axle (3).

Technical Field

The invention relates to the technical field of automobiles, in particular to an air suspension.

Background

With the increasing strictness of regulations and regulations, the punishment of illegal behaviors such as overrun, overspeed and the like is increased, and legal multi-pull express runs become the most important problem at present. The height of the semi-trailer traction vehicle is limited by 4 meters, larger volume of the cargo compartment can be obtained by reducing the height of the saddle, and the semi-trailer traction vehicle has great market prospect for the express transportation industry mainly for lightly throwing the cargo in the market.

The height (distance from a saddle to the ground) of a common tractor saddle on the domestic market is 1200-1300 mm. The low chassis motorcycle type packing box is liftoff low, and it is more light laborsaving when carrying goods to get on or off the bus, and lower floor means that the vehicle focus is lower, and vehicle stability of traveling can be better. The height of the saddle can be reduced to about 1100mm through the low-chassis suspension with the air suspension, the lifting of the volume of the cargo compartment is limited, the economic benefit of a user is difficult to maximize, and the production cost is higher.

Disclosure of Invention

The invention aims to provide an air suspension, which reduces the height of a saddle, maximizes the volume of a cargo compartment and improves the economic benefit of a user.

In order to achieve the purpose, the invention adopts the following technical scheme:

an air suspension comprising:

the cross beam is arranged inside the frame, and the frame is used for mounting a saddle;

a drive axle located below the frame;

a suspension bracket provided at the bottom of the frame and located in front of the transaxle;

a trailing arm located below the frame and connected to the transaxle;

one end of the air spring assembly is connected to the frame, and the other end of the air spring assembly is connected to the support arm;

a first connecting rod, one end of which is rotatably connected with the supporting arm, the other end of which is rotatably connected with the suspension bracket,

the second connecting rod is positioned above the first connecting rod, one end of the second connecting rod is connected to the top of the drive axle through an upper bridge support, the other end of the second connecting rod is rotatably connected to the cross beam, and the upper bridge support is of a flat structure;

the number of the first connecting rods and the number of the second connecting rods are two, the first connecting rods and the second connecting rods form a four-bar mechanism, the second connecting rods are arranged in a V-shaped structure, and the large opening end of the V-shaped structure faces the cross beam.

Preferably, both ends of the first connecting rod and both ends of the second connecting rod are provided with rubber bushings, the rigidity of the rubber bushings is less than a preset rigidity, each rubber bushing has an initial preset angle, and the saddle height of the saddle can be adjusted to 900 mm.

Preferably, the air spring assembly further comprises an adapter seat, and the air spring assembly is arranged on the supporting arm through the adapter seat.

Preferably, a first installation plane is formed between the supporting arm and the adapter, a second installation plane is formed between the supporting arm and the drive axle, and the height of the first installation plane is lower than that of the second installation plane.

Preferably, a first connecting port is arranged on one side, far away from the frame, of the support arm, the first connecting port is rotatably connected to the first connecting rod, and the height of the first connecting port is higher than a preset height.

Preferably, the suspension device further comprises a shock absorber, the shock absorber is located in front of the drive axle, one end of the shock absorber is connected to the frame through a shock absorption bracket, and the other end of the shock absorber is arranged on the supporting arm.

Preferably, a second connection port is provided on a side of the bracket arm close to the frame, and the second connection port is connected to the shock absorber.

Preferably, the vehicle further comprises a stabilizer bar, one end of the stabilizer bar is connected to the bracket arm, and the other end of the stabilizer bar is connected to the frame through a suspension arm.

Preferably, the air spring assembly comprises a first air spring and a second air spring, the distance between the first air spring and the center of the drive axle is La, the distance between the second air spring and the center of the drive axle is Lb, and Lb/La is 1.15-1.25.

Preferably, the frame is provided with a receiving groove at a side close to the driving axle, and the receiving groove is used for partially receiving the driving axle.

The invention has the beneficial effects that:

according to the air suspension provided by the invention, one end of the air spring assembly is connected to the frame, and the other end of the air spring assembly is connected to the support arm, so that the air spring assembly has good structural stability, and plays a role in buffering and damping by utilizing the elasticity of the air spring assembly when a vehicle is in a bumpy road condition. Two first connecting rods and two second connecting rods form a four-bar mechanism, the drive axle is connected to the cross beam and the suspension bracket through the four-bar mechanism, the change of the inclination angle of the drive axle in the up-and-down jumping process is reduced by adopting the mode of reasonable length setting of the four connecting rods, the reasonable included angle of a power line of a transmission shaft is ensured, and meanwhile, the air spring assembly only bears the load in the vertical direction, and the service life of the air spring assembly is prolonged. Two second connecting rods adopt V-arrangement structural arrangement to cooperation bridge upper bracket is the flat structural design of platykurtic structure, compares traditional arrangement form and has reduced the space above the chassis and occupy, has guaranteed the sufficient stroke of jumping on the chassis, when jumping extreme condition promptly, has avoided second connecting rod and bridge upper bracket and trailer or goods railway carriage or compartment's interference, for the trailer matches provides sufficient space, has improved the volume of goods railway carriage or compartment, thereby improves user economic benefits.

Drawings

FIG. 1 is a schematic structural view of an air suspension of the present invention;

FIG. 2 is a schematic illustration of the assembly of an air spring assembly in an air suspension according to the present invention.

In the figure:

01. a first mounting plane; 02. a second mounting plane;

1. a frame; 2. a cross beam; 3. a drive axle; 4. a suspension bracket; 5. a bracket arm; 6. an air spring assembly; 7. a first link; 8. a second link; 9. a bridge upper bracket; 10. a connecting member; 11. a shock absorber; 12. a shock-absorbing support; 13. a stabilizer bar; 14. a suspension arm; 15. a height sensor assembly; 16. an upper cover plate; 17. an adapter base; 18. a limiting bracket;

51. a first connection port; 52. a second connection port; 53. a third connection port;

61. a first air spring; 62. a second air spring.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

The embodiment provides an air suspension which is suitable for the field of tractors. As shown in fig. 1. The air suspension comprises a frame 1, a cross beam 2, a drive axle 3, a suspension bracket 4, a supporting arm 5, an air spring assembly 6, a first connecting rod 7, a second connecting rod 8 and an upper bridge bracket 9, wherein the frame 1 is of a frame structure, the frame 1 is used for mounting a saddle, and the frame 1 plays a role in integral support. A cross member 2 is provided inside the vehicle frame 1, a drive axle 3 is provided below the vehicle frame 1, a suspension bracket 4 is provided in front of the drive axle 3, and the suspension bracket 4 is provided at the bottom of the vehicle frame 1. A bracket 5 is located below the frame 1 and is connected to the drive axle 3, the bracket 5 acting as a load bearing air spring assembly 6. One end of the air spring assembly 6 is connected with the frame 1, the other end of the air spring assembly 6 is connected with the support arm 5, and the air spring assembly 6 plays a role in buffering. The quantity of first connecting rod 7 and second connecting rod 8 is two, and the one end of first connecting rod 7 is rotated and is connected in trailing arm 5, and the other end rotates and connects in suspension bracket 4, and second connecting rod 8 is located the top of first connecting rod 7, and the one end of second connecting rod 8 is passed through bridge upper bracket 9 and is connected in the top of transaxle 3, and the other end rotates and connects in crossbeam 2, and bridge upper bracket 9 is the platykurtic structure, and bridge upper bracket 9 has played the effect of intermediate junction. Two first connecting rods 7 and two second connecting rods 8 form a four-bar linkage, and two second connecting rods 8 are arranged in a V-shaped structure, and the large opening end of the V-shaped structure is arranged towards the cross beam 2.

The air suspension that this embodiment provided connects in frame 1 through the one end that sets up air spring assembly 6, and the other end is connected in trailing arm 5, and air spring assembly 6's structural stability is good, and when the vehicle was in the road conditions of jolting, utilized air spring assembly 6's self elasticity, played buffering absorbing effect. Two first connecting rods 7 and two second connecting rods 8 form a four-bar linkage mechanism, the driving axle 3 is connected to the cross beam 2 and the suspension bracket 4 through the four-bar linkage mechanism, the mode that the length of the four-bar linkage is reasonably set is adopted, the change of the inclination angle of the driving axle 3 in the up-down jumping process is reduced, the reasonable power line included angle of a transmission shaft is ensured, meanwhile, the air spring assembly 6 only bears the load in the vertical direction, and the service life of the air spring assembly 6 is prolonged. Two second connecting rods 8 adopt V-arrangement structural arrangement to cooperate bridge upper bracket 9 to be the flat structural design of platykurtic structure, compare traditional arrangement form and reduced the space above the chassis and occupy, guaranteed the sufficient stroke of jumping up of chassis, when jumping extreme condition promptly, avoided second connecting rod 8 and bridge upper bracket 9 and trailer or goods railway carriage or compartment's interference, provide sufficient space for the trailer matches, improved the volume of goods railway carriage or compartment, thereby improve user economic benefits.

Further, the frame 1 and the cross member 2 are preferably integrally formed. Cancel traditional air suspension structure's last reaction pole linking bridge, compared in traditional split type structure, set up frame 1 and crossbeam 2 for the casting integral type structure, solved the poor problem of traditional structure assembly precision, structural style is simple simultaneously, has reduced weight and cost.

Further, the transaxle 3 and the bridge upper bracket 9 are preferably of an integrally molded structure. The bridge welding bracket with the traditional air suspension structure is omitted, compared with a traditional welding mode, the bridge welding bracket with the traditional air suspension structure adopts a cast integrated structure, the problem that the assembly precision of the traditional structure is poor is solved, meanwhile, the structural form is simple, and the weight and the cost are reduced.

Further, the frame 1 is provided with a receiving groove at a side close to the transaxle 3, the receiving groove being used for partially receiving the transaxle 3. At the top position of transaxle 3, frame 1 is sunken to the direction that is close to transaxle 3, forms the holding tank, and the holding tank provides sufficient stroke space of beating for transaxle 3. Optionally, a limiting support 18 is mounted on the frame 1, the limiting support 18 is mounted right above the drive axle 3 to provide an upward-jumping limiting protection for the drive axle 3, the limiting support 18 is used for limiting the drive axle 3, and the limiting support 18 provides an upward-jumping limiting value for the drive axle 3 to ensure a sufficient safety gap between the tire and the trailer.

Further, the frame 1 is connected to the suspension bracket 4 through bolts, and the structure is simple and the fixing effect is good. Optionally, the suspension brackets 4 and the cross beam 2 share a bolt to ensure the connection rigidity and reliability of the frame 1, and meanwhile, the suspension brackets 4 are of a symmetrical structure, and the suspension brackets 4 are respectively arranged on the left side and the right side of the frame 1 to reduce the cost of a mold and manufacture.

Further, the bracket arm 5 is connected to the driving axle 3 through a connecting member 10, and the connecting member 10 is preferably a U-shaped bolt to ensure the connection stability between the bracket arm 5 and the driving axle 3.

In order to further improve the damping effect, the air suspension further comprises a damper 11 and a damping bracket 12, wherein the damper 11 is positioned in front of the drive axle 3, one end of the damper 11 is connected to the frame 1 through the damping bracket 12, and the other end of the damper is arranged on the supporting arm 5. Through setting up bumper shock absorber 11 for the impact load on attenuation car driving in-process road surface promotes the car travelling comfort, reduces the damage of vibration to the chassis top goods.

Optionally, the air suspension further comprises a stabilizer bar 13 and a boom 14, wherein one end of the stabilizer bar 13 is connected to the bracket arm 5, and the other end is connected to the frame 1 through the boom 14. The transverse stabilizer bar 13 adopts a large-diameter hollow structure, and the rigidity of the transverse stabilizer bar 13 is high, so that enough roll rigidity is provided for the chassis, and the stability of the automobile stroke is improved. Meanwhile, on the premise of meeting the use requirements of the gap and the bush corner in the up-and-down jumping stroke of the drive axle 3, the length of the suspension arm 14 is reduced as much as possible, the length of the suspension arm 14 is preferably 500-520 mm, so that the departure angle of the automobile is improved, and preferably, the departure angle is larger than 12 degrees. Through the reasonable arrangement of the first connecting rod 7, the transverse stabilizer bar 13 and the suspension system, the chassis can adapt to the requirement of the minimum 1830mm wheel track, and the self weight of the chassis and the width of an automobile are reduced.

Further, the air suspension further comprises a height sensor assembly 15, wherein the height sensor assembly 15 is installed on the vehicle frame 1 and arranged behind the drive axle 3, a left-right two-point arrangement is adopted, the left side and the right side are independently controlled through an ECAS electromagnetic valve, and higher roll rigidity can be provided for the chassis compared with a single-point height sensor.

Further, rubber bushings are arranged at two ends of the first connecting rod 7 and two ends of the second connecting rod 8, the rigidity of the rubber bushings is smaller than the preset rigidity, and each rubber bushing has an initial preset angle, so that the height of the saddle can be adjusted to 900 mm. Rubber bushings are embedded in the casings at the two ends of the first connecting rod 7 and the two ends of the second connecting rod 8, the rubber bushings with small rigidity and the reasonable initial preset angle design of the bushings are selected, the height of a saddle can be reduced to the maximum extent under the no-load state of the automobile on the chassis, the height of the saddle can be adjusted to 900mm at the minimum, and the air suspension is an air suspension system with a low chassis.

As shown in fig. 2, the air suspension further comprises an upper cover plate 16 and an adapter 17, wherein the top end of the air spring assembly 6 is mounted on the frame 1 through the upper cover plate 16, and the connection stability between the air spring assembly 6 and the frame 1 is ensured. The bottom end of the air spring assembly 6 is arranged on the support arm 5 through the adapting seat 17, so that the connection stability between the air spring assembly 6 and the support arm 5 is ensured, the top end and the bottom end of the air spring assembly 6 can be supported, the structural stability is good, and the reliability is high.

Further, a first installation plane 01 is formed between the bracket arm 5 and the adapter 17, and a second installation plane 02 is formed between the bracket arm 5 and the drive axle 3, wherein the height of the first installation plane 01 is lower than that of the second installation plane 02. By arranging a large height drop between the first mounting plane 01 and the second mounting plane 02, the air spring assembly 6 can be ensured to have enough jumping stroke space under the condition of a lower distance between the drive axle 3 and the frame 1, and the preferable stroke is 40-50 mm in the upward jumping stroke and 130-150 mm in the downward jumping stroke.

Optionally, the air spring assembly 6 comprises a first air spring 61 and a second air spring 62, the first air spring 61 and the second air spring 62 corresponding to two air spring models. In the present embodiment, four air springs are preferably arranged on the chassis, and the number of the first air spring 61 and the second air spring 62 is two, so as to ensure better shock resistance. The distance between the centers of the first air spring 61 and the drive axle 3 is La, the distance between the centers of the second air spring 62 and the drive axle 3 is Lb, and the Lb/La is set to be 1.15-1.25 according to the arrangement space requirement and the bearing capacity of each air spring.

Optionally, a first connecting port 51 is arranged on a side of the bracket arm 5 away from the frame 1, the first connecting port 51 is rotatably connected to the first connecting rod 7, and the height of the first connecting port 51 is higher than a preset height. Through reasonable arrangement, the first connecting port 51 is raised by 30-40 mm compared with the traditional structure, the minimum ground clearance of the chassis is ensured to be more than 120mm, and the trafficability characteristic and the ground adaptability of the automobile are improved.

Optionally, a second connection port 52 is arranged on one side of the bracket arm 5 close to the frame 1, the second connection port 52 is connected to the shock absorber 11, one end of the shock absorber 11 is connected to the frame 1 through the shock absorbing bracket 12, and the other end of the shock absorber 11 is arranged on the bracket arm 5 through the second connection port 52, so as to ensure the fixing effect of the shock absorber 11.

Optionally, a third connection port 53 is provided on a side of the bracket arm 5 away from the frame 1, the stabilizer bar 13 is disposed below the bracket arm 5, and one end of the stabilizer bar 13 is fixedly connected to the drive axle 3 through the third connection port 53 and is connected to the frame 1 through the suspension arm 14 to ensure a fixing effect of the stabilizer bar 13.

In the description herein, it is to be understood that the terms "upper", "lower", "right", and the like are based on the orientations and positional relationships shown in the drawings and are used for convenience in description and simplicity in operation, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be constructed in a particular operation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.

In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.