CN106004299B - A kind of single drive axle air suspension assembly - Google Patents

Abstract

An air suspension assembly for a single driving axle belongs to the technical field of automobile suspension. It is characterized in that: an integrated air storage tank type beam (8) is provided between the connecting brackets (4) on the left and right sides, and the air storage tank type beam (8) includes the air storage tank in the middle and the installation parts at both ends , the gas tank type beam (8) is fixedly connected to the connecting brackets (4) on the left and right sides through the installation parts at both ends; the V-shaped thrust rod assembly (9) is installed on both sides of the gas tank type beam (8), And through the V-shaped thrust rod assembly (9), it is respectively connected with the lifting axle (2) and the drive axle (6). The integrated structure of the gas storage tank beam avoids the problem of difficult installation of the V-shaped thrust rod assembly due to the existence of accumulated errors, and improves the assembly accuracy and efficiency; the two ends of the gas storage tank beam are connected to the left and right sides The connecting bracket is fixedly connected, which solves the problem of concentrated force on the frame.

Description

A single drive axle air suspension assembly

technical field

An air suspension assembly for a single drive axle belongs to the technical field of automobile suspension.

Background technique

With the rapid development of the tractor industry and the continuous improvement and upgrading of the technology of the domestic tractor industry, people are increasingly aware of the requirements for the use of tractors. There are higher and higher requirements in various aspects such as reliability and maintenance when the vehicle is used for a long time. The most important part of the heavy-duty tractor and the part that reflects the key performance of the tractor is the suspension system assembly. The structural design of the assembly is directly related to the overall performance of the tractor. After investigating and researching the air suspension tractors produced by major domestic OEMs and analyzing the relevant comparative test data, our company found that the air suspension systems produced by domestic OEMs have the following deficiencies: First The frame of the air suspension system cannot be effectively connected together, but is connected together by bolts through the V-shaped thrust rod mount on the balance bracket and the two small ends of the V-shaped thrust rod. Such a frame has poor structural stability. , the overall suspension is unevenly stressed, the frame is easily deformed by the impact load, there is a certain error in the processing of parts, and there is also a certain cumulative error in assembly during assembly, so finally connect the two small ends of the V-shaped thrust rod to the balance bracket When there is a large assembly cumulative error, the assembly accuracy and assembly efficiency are reduced. Second: The overall weight of the domestic air suspension system is relatively heavy. The part of the suspension system that transmits traction loads uses a structure of four lower thrust rods and two stabilizer bars, which not only makes the weight of the air suspension system heavier , but also make the structure of the air suspension system more complicated, and the number of parts that need to be overhauled and maintained is large, which increases the manufacturing cost of the air suspension system. Third: The rear axle lifting structure adopted by the domestic air suspension system is complicated. It uses the air pressure of the air spring to lift the rear axle through the guide arm, the guide arm bracket, the central support point and other structures. Such a structure It is more complicated, increases the weight of the air suspension system, and increases the instability factor of the suspension. Fourth: The structure of the V-shaped thrust rod mounting seat assembly used in the domestic air suspension is a joint bearing ball assembly structure, which has many internal matching connection points, and the assembly process is complicated, and the number of assembled parts is large. The risk factor is high, which increases the instability of the overall suspension system.

Contents of the invention

The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, to provide a single drive axle air suspension with uniform force, which can reduce the force on the frame, have high connection strength with the frame, and optimize the structure of the frame Assembly.

The technical solution adopted by the present invention to solve the technical problem is: the air suspension assembly of the single driving axle includes the lifting axle, the driving axle and the connecting brackets on the left and right sides, and the two ends of the lifting axle and the driving axle are arranged symmetrically. An equalizing beam, each end of which is equipped with load-carrying airbags, is characterized in that: an integrated air storage tank type beam is provided between the connecting brackets on the left and right sides, and the air storage tank type beam includes a central The gas storage tank and the installation parts at both ends, the gas storage tank type beam is fixedly connected with the connecting brackets on the left and right sides through the installation parts at both ends;

V-shaped thrust rod assemblies are installed on both sides of the air storage tank type beam, and are respectively connected with the lifting axle and the driving axle through the V-shaped thrust rod assembly.

Preferably, a stabilizer bar assembly is provided between the lifting bridge and the connecting bracket.

Preferably, the stabilizer bar assembly includes a trailer arm and a mounting beam of the lifting axle. There are two trailer arms, which are symmetrically arranged at both ends of the mounting beam. The two ends of the trailer arm are respectively connected to the connecting bracket and the mounting beam on the corresponding side. .

Preferably, the lifting bridge is provided with an airbag type lifting mechanism.

Preferably, the airbag type lifting mechanism includes a lifting airbag, a detection unit and a control device, the lower end of the lifting airbag is installed with an airbag connecting plate for connecting with the vehicle frame, the upper end of the lifting airbag is connected with the lifting bridge; the detection unit is connected with the control device , the detection unit is used to detect the height of the wheel and transmit the signal to the control device to adjust the air pressure of the lift airbag.

Preferably, an equalizing beam is symmetrically installed at both ends of the lifting axle and the driving axle.

Preferably, the axis of the equalizing beam located below the lifting bridge is perpendicular to the axis of the lifting bridge, and the middle part is fixedly connected to the lifting bridge.

Preferably, one end of the V-shaped thrust rod assembly is fixed on the installation part of the gas storage tank type beam, and the other end of the V-shaped thrust rod assembly is provided with a spherical V-shaped thrust rod mounting seat assembly, and the The V-shaped thrust rod mounting seat assembly is movably connected with the lifting axle or drive axle, and the V-shaped thrust rod mounting seat is an integral forged structure.

Preferably, a lower thrust rod assembly is provided between the drive axle and the connecting bracket, there are two lower thrust rod assemblies, one end of the lower thrust rod assembly is connected to the connecting bracket on the corresponding side, and the other end is connected to the drive axle Below the equalizing beam connection.

Compared with the prior art, the beneficial effects of the single drive axle air suspension assembly of the present invention are:

1. The gas tank type beam combines the gas tank and the beam into one, which reduces weight, saves space, reduces cost, reduces the accumulation of assembly errors, makes the thrust rod easy to install, and avoids the accumulation of errors caused by the accumulation of errors. The problem of difficult installation of the V-shaped thrust rod assembly improves the assembly accuracy and assembly efficiency; the two ends of the air storage tank type beam are fixedly connected to the connecting brackets on the left and right sides, which improves the connection of the air suspension assembly of the single drive axle. Strength, and optimize the structure of the frame, solve the problem of concentrated force on the frame, and improve the service life of the frame.

2. The stabilizer bar assembly saves the number of parts of the air suspension assembly, optimizes the suspension system, and realizes the lightweight technical requirements of the air suspension; the stabilizer bar assembly can withstand the weight of the air suspension The traction load and roll angle rigidity displacement load, and the hollow stabilizer bar assembly has no deformation at the bending arc, and the material cross-section is evenly transitioned, so the stabilizer bar has no stress concentration point, and its stability, reliability and service life are excellent. There are good improvements and improvements.

3. The lifting axle adopts a pure airbag lifting structure, which simplifies the assembly process and structure, and realizes the technical requirements of light weight. The lifting axle is lifted by lifting the airbag in the no-load state, thereby reducing the actual consumption of the tractor, and Lifting the airbag will not affect the work of carrying the airbag, the structure is simple and easy to maintain.

4. The balance beam is symmetrically arranged, so that the force of the air suspension assembly is evenly distributed on the balance beam of the air suspension, and the air spring is placed on the balance beam, and due to the effect of the air spring, the suspension system The vertically acting loads are buffered and deloaded.

5. There are two load-carrying airbags on each equalizing beam. There are eight load-carrying airbags in total, and they are symmetrically arranged on both sides of the air suspension assembly, so that the supporting force on the frame is uniform, and the air suspension assembly of the air suspension is improved. The coordination of the formation improves the carrying capacity and service life.

6. The V-shaped thrust rod mounting seat is an integral forged structure, which reduces production costs, improves the strength and service life of the V-shaped thrust rod mounting seat assembly, and simplifies the assembly process of the V-shaped thrust rod assembly, improving the The overall practicality and stability of the air suspension assembly.

Description of drawings

Fig. 1 is a three-dimensional schematic diagram of a single drive axle air suspension assembly.

Fig. 2 is a schematic bottom view of the air suspension assembly of a single driving axle.

FIG. 3 is a partial enlarged view of A in FIG. 2 .

Figure 4 is a schematic diagram of the installation of the stabilizer bar assembly.

Fig. 5 is a schematic front view of the single drive axle air suspension assembly after installation.

In the figure: 1. Carrying air bag 2, lifting bridge 201, mounting beam 3, stabilizer bar assembly 301, trailer arm 4, connecting bracket 5, lower thrust rod assembly 6, drive axle 7, transverse stabilizer bar 8, gas storage tank Type beam 9, V-shaped thrust rod assembly 10, lifting air bag 11, equalizing beam 12, rubber bushing assembly 13, vehicle frame.

detailed description

Fig. 1～5 is preferred embodiment of the present invention, below in conjunction with accompanying drawing 1～5 the present invention is described further.

An air suspension assembly for a single driving axle, including a lifting axle 2, a driving axle 6, and connecting brackets 4 on the left and right sides. An equalizing beam 11 is symmetrically arranged under the two ends of the lifting axle 2 and the driving axle 6, and each Both ends of the equalizing beam 11 are provided with bearing airbags 1, and an integrated air storage tank type beam 8 is provided between the connecting brackets 4 on the left and right sides. The air storage tank type beam 8 includes the air storage tank in the middle and the installation at both ends part, the gas storage tank type beam 8 is fixedly connected with the connecting brackets 4 on the left and right sides through the installation parts at both ends;

A V-shaped thrust rod assembly 9 is installed on both sides of the gas storage tank type beam 8, and is connected with the lifting axle 2 and the driving axle 6 through the V-shaped thrust rod assembly 9 respectively.

The gas tank type beam 8 combines the gas tank and the beam into one, which reduces the weight, saves space, reduces the cost, reduces the accumulation of assembly errors, makes the thrust rod easy to install, and avoids the V caused by the accumulation of errors. The problem of difficult installation of the type thrust rod assembly 9 improves the assembly accuracy and assembly efficiency; the two ends of the air storage tank type beam 8 are fixedly connected with the connecting brackets 4 on the left and right sides respectively, which improves the air suspension assembly of the single drive axle. The connection strength is high, and the structure of the vehicle frame 13 is optimized, the problem of the concentrated force of the vehicle frame 13 is solved, and the service life of the vehicle frame 13 is improved.

Specifically: as shown in FIGS. 1-2 : the axes of the lifting axle 2 and the driving axle 6 are parallel, and the lifting axle 2 is arranged on the right side of the driving axle 6 . Both ends of the lifting axle 2 and the drive axle 6 are symmetrically provided with an equalizing beam 11, and the axis of the equalizing beam 11 is perpendicular to the axis of the lifting axle 2 or the driving axle 6 and is located on the same horizontal plane.

The middle part of the equalizing beam 11 is fixedly connected with the lifting axle 2 or the drive axle 6, and the thickness of the equalizing beam 11 in the vertical direction gradually decreases from the middle part to both ends. Both ends of the equalizing beam 11 are upturned, and a load-carrying airbag 1 is installed respectively, the lower end of the load-bearing airbag 1 is fixedly connected with the equalizing beam 11 , and the upper end is used for fixedly connecting with the vehicle frame 13 . There are eight load-bearing airbags 1, and the eight load-bearing airbags 1 form two rows and are symmetrically arranged on both sides of the air suspension assembly, so that the weight carried by the air suspension assembly can be evenly distributed to avoid uneven distribution. The excessive load of some parts improves the load capacity and service life of the air suspension assembly.

The connecting bracket 4 is tapered gradually widening from bottom to top. There are two connecting brackets 4 symmetrically arranged on both sides of the air suspension assembly. The upper end of the connecting bracket 4 is used for fixed connection with the vehicle frame 13 . The gas storage tank type beam 8 is arranged between the two connection brackets 4, the gas storage tank type beam 8 includes the gas storage tank in the middle and the installation parts at both ends, the gas storage tank type beam 8 is respectively connected to the two connection brackets 4 through the installation part. The fixed connection in the middle along the vertical direction increases the strength of the air suspension assembly, disperses the concentrated moment on the vehicle frame 13, and improves the stability and service life of the vehicle frame 13.

The two small ends of the V-shaped thrust rod assembly 9 are fixedly connected to the mounting parts at both ends of the gas storage tank type beam 8 through bolts. There are two V-shaped thrust rod assemblies 9, and the big ends of the two V-shaped thrust rod assemblies 9 are connected with the lifting axle 2 and the drive axle 6 respectively. The large end of the V-shaped thrust rod assembly 9 is provided with a V-shaped thrust rod mounting seat assembly. One end of the V-shaped thrust rod mounting seat assembly is spherical, and the V-shaped thrust rod mounting seat assembly is an integral forged structure. The assembly 9 is connected with the lifting axle 2 or the drive axle 6 through the V-shaped thrust rod mounting seat assembly. When assembling, it is only necessary to set the spherical end of the V-shaped thrust rod mounting seat assembly into the large end shell of the V-shaped thrust rod assembly 9 under a certain pressure. The other end is fixed on the lifting axle 2 or drive axle 6, which reduces the production cost, improves the strength and service life of the V-shaped thrust rod mounting seat assembly, simplifies the assembly process of the V-shaped thrust rod mounting seat assembly, and improves The overall practicality and stability of the air suspension assembly are guaranteed. There are two V-shaped thrust rod assemblies 9, and are fixedly connected with the lifting axle 2 and the driving axle 6 respectively.

The gas storage tank type beam 8 is integrally cast and formed, and is processed by a machining center at one time, which reduces machining errors and assembly errors, and improves assembly accuracy.

The left side of the drive axle 6 is provided with a stabilizer bar 7, the stabilizer bar 7 is in the shape of a "匚" opening to the left, the vertical part of the stabilizer bar 7 is parallel to the axis of the drive axle 6, and the axis of the stabilizer bar 7 is located at level. The two ends of the vertical part of the stabilizer bar 7 are respectively fixed on the two equalizing beams 11 below the drive axle 6 . The end of the horizontal part of the stabilizer bar 7 faces to the left, and the two ends of the horizontal part of the stabilizer bar 7 are provided with a stabilizer bar upright. The vertical bar of the stabilizer bar is vertically arranged, and the lower end of the vertical bar of the stabilizer bar is connected with the drive axle 6 by bolts, and the upper end is used for being fixedly connected with the vehicle frame 13 .

A lower thrust rod assembly 5 is arranged between the drive axle 6 and the connecting bracket 4 , and the axis of the lower thrust rod assembly 5 is arranged parallel to the axis of the equalizing beam 11 . The lower thrust rod assembly 5 corresponds to the equalizing beam 11 one by one, the right end of the lower thrust rod assembly 5 is connected with the connecting bracket 4 by bolts, and the left end of the lower thrust rod assembly 5 is connected with the equalizing beam 11 . The left end of the lower thrust rod assembly 5 is provided with a thrust rod vertical rod, the thrust rod vertical rod is vertically arranged, the lower end of the thrust rod vertical rod is connected with the lower thrust rod assembly 5, and the upper end of the thrust rod vertical rod is used to connect with the vehicle frame 13 Fixed connection.

The lifting axle 2 is provided with an airbag-type lifting mechanism, which includes a lifting airbag 10, a detection unit and a control device, the detection unit is a vehicle height sensor, and the control device is a single-chip microcomputer. The lower end of the lifting airbag 10 is equipped with an airbag connecting plate for being connected with the vehicle frame 13. The two ends of the airbag connecting plate are bent upwards and are used to be fixedly connected with the vehicle frame 13. The lifting airbag 10 is installed in the middle of the airbag mounting plate. The upper end of the lifting air bag 10 is connected with the lifting bridge 2 . The vehicle height sensor is installed near the front and rear wheels of the tractor to detect the height of the vehicle and transmit the signal to the single chip microcomputer. lift. The airbag lifting structure is adopted, which simplifies the assembly process and structure, and realizes the lightweight technical requirements. In the no-load state, the hoisting axle 2 of the tractor can be lifted by adjusting the lifting air bag 10, so as to reduce the actual energy consumption of the tractor.

As shown in Figures 3 to 4: a stabilizer bar assembly 3 is provided between the lifting axle 2 and the connecting bracket 4, the stabilizer bar assembly 3 includes the trailer arm 301 and the installation beam 201 of the lifting axle 2, the axis of the installation beam 201 and the drive The axes of the bridge 6 are parallel, and there are two trailer arms 301 , and the two trailer arms 301 are symmetrically arranged at both ends of the installation beam 201 , and are perpendicular to the axis of the installation beam 201 . One end of the trailer arm 301 is fixedly connected to the installation beam 201, and the other end is directly fixedly connected to the connection. The mounting beam 201 is tubular.

The stabilizer bar assembly 3 replaces the four lower thrust bars and two stabilizer bars in the original air suspension, which not only saves the number of air suspension components, optimizes the suspension system, but also realizes the air suspension assembly Lightweight technical requirements. In addition, the stabilizer bar assembly 3 can bear the traction load and roll stiffness displacement load of the air suspension, and the stabilizer bar assembly 3 does not have deformation at the bending arc, and the material cross-section is evenly transitioned, so the stabilizer bar assembly 3 There is no stress concentration point, and its stability, reliability, and service life are well improved and improved. The ordinary stabilizer bar can only be used with the lower thrust rod, and the number of parts is large, and the ordinary stabilizer bar cannot bear the axial force.

As shown in Figure 5: when the air suspension assembly of the single drive axle is installed on the vehicle frame 13, the upper ends of the two connecting brackets 4 are fixedly connected to the vehicle frame 13 by bolts, and the bolts are tightened under a certain torque load. The upper end of the bearing airbag 1 is fixedly connected with the vehicle frame 13 by bolts, and is tightened under the action of a certain torque. The upper ends of the stabilizer bar vertical rod and the thrust rod vertical rod are fixedly connected with the vehicle frame 13 by bolts, and the two ends of the airbag connecting plate are fixedly connected with the vehicle frame 13 by bolts.

The air suspension assembly of the single drive axle realizes the lightweight technical requirements in terms of weight, optimizes the design in structure, improves the connection strength and stability of the air suspension assembly, and simplifies the assembly process.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention to other forms. Any skilled person who is familiar with this profession may use the technical content disclosed above to change or modify the equivalent of equivalent changes. Example. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims (8)

1. a kind of single drive axle air suspension assembly, including lift bridge（2）, drive axle（6）And the connecting bracket of the left and right sides （4）, lift bridge（2）And drive axle（6）Both ends below be arranged with an equalizer（11）, each equalizer（11）Both ends Top be equipped with carrying air bag（1）, it is characterised in that：The connecting bracket of the left and right sides（4）Between be provided with integral type Gas storage pot type crossbeam（8）, gas storage pot type crossbeam（8）The installation portion of air accumulator and both ends including middle part, gas storage pot type crossbeam （8）Pass through the installation portion at the both ends connecting bracket with the left and right sides respectively（4）It is fixedly connected；

Gas storage pot type crossbeam（8）Both sides are provided with V-type distance rod assembly（9）, and pass through V-type distance rod assembly（9）Respectively with carrying Rise bridge（2）And drive axle（6）Connection.

2. single drive axle air suspension assembly according to claim 1, it is characterised in that：Described lift bridge（2）With connecting Connect support（4）Between be provided with stabiliser bar assembly（3）.

3. single drive axle air suspension assembly according to claim 2, it is characterised in that：Described stabiliser bar assembly（3） Including tow arm（301）And lift bridge（2）Installation crossbeam（201）, tow arm（301）There are two, be symmetricly set on installation Crossbeam（201）Both ends, tow arm（301）The both ends connecting bracket with respective side respectively（4）With installation crossbeam（201）Connection.

4. single drive axle air suspension assembly according to claim 1, it is characterised in that：Described lift bridge（2）On set There is gasbag-type hoisting mechanism.

5. single drive axle air suspension assembly according to claim 4, it is characterised in that：Described gasbag-type hoisting mechanism Including lifting air bag（10）, detection unit and control device, lift air bag（10）Lower end be provided with and be used for and vehicle frame（13） The air bag connecting plate of connection, lift air bag（10）Upper end and lift bridge（2）It is connected；Detection unit is connected with control device, detection Unit is used to detect wheel height, and signal is passed into control device, so as to adjust lifting air bag（10）Air pressure.

6. single drive axle air suspension assembly according to claim 1, it is characterised in that：Positioned at lift bridge（2）Lower section Described equalizer（11）Axis and lift bridge（2）Axis it is vertical, and middle part and lift bridge（2）It is fixedly connected, equalizer （11）Both ends upwarp and respectively with two carrying air bags（1）It is fixedly connected.

7. single drive axle air suspension assembly according to claim 1, it is characterised in that：Described V-type distance rod assembly （9）One end is fixed on gas storage pot type crossbeam（8）Installation portion on, V-type distance rod assembly（9）It is spherical V-type that the other end, which is provided with, Distance rod seat assembly, and by V-type distance rod seat assembly respectively with lift bridge（2）And drive axle（6）It is flexibly connected, V-type distance rod mounting seat is Integral forge type structure.

8. single drive axle air suspension assembly according to claim 1, it is characterised in that：Described drive axle（6）And even Connect support（4）Between be provided with lower thrust rod assembly（5）, lower thrust rod assembly（5）Two are provided with, lower thrust rod assembly（5）One End and the connecting bracket of respective side（4）Connection, the other end and drive axle（6）The equalizer of lower section（11）Connection.