CN106042812B - A kind of tandem axle air suspension assembly - Google Patents

Abstract

The utility model relates to an air suspension assembly of double driving axles, which 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 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; the gas storage tank type beam (8) is symmetrically installed on both sides of the V-shaped thrust rod assembly (9), It is connected to the rear drive axle (2) and the air suspension drive axle (6) respectively through the V-shaped thrust rod assembly (9). 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 double drive axle air suspension assembly

technical field

The utility model relates to an air suspension assembly of double driving axles, which 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 V-shaped thrust rod mounting seat structure used in 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, and there are risks The coefficient 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 double 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 double drive axle air suspension assembly, including the rear drive axle, the air suspension drive axle and the connecting brackets on the left and right sides, the rear drive axle and the air suspension drive axle An equalizing beam is symmetrically arranged under both ends of each equalizing beam, and a bearing airbag is arranged above both ends of each equalizing beam. , the gas storage tank type beam includes the gas storage tank in the middle and the installation parts at both ends, and 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 symmetrically installed on both sides of the air storage tank type beam, and are respectively connected with the rear drive axle and the air suspension drive axle through the V-shaped thrust rod assembly.

Preferably, a stabilizer bar assembly is provided between the rear drive axle and the connecting bracket.

Preferably, the stabilizer bar assembly includes a trailer arm and a mounting beam of the rear drive axle. There are two trailer arms, which are symmetrically arranged at both ends of the mounting beam. connect.

Preferably, both sides of the rear drive axle are symmetrically provided with shock absorbers, the lower end of the shock absorber is connected with the equalizing beam, and the upper end of the shock absorber is used for fixed connection with the vehicle frame.

Preferably, an equalizing beam is symmetrically installed at both ends of the rear drive axle and the air suspension drive axle.

Preferably, the axis of the equalizing beam located below the rear drive axle is perpendicular to the axis of the rear drive axle, and the middle part is fixedly connected to the rear drive axle.

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 rear drive axle and the air suspension drive axle respectively, and the V-shaped thrust rod mounting seat is an integral forged structure.

Preferably, a lower thrust rod assembly is provided between the air suspension 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 connecting bracket on the corresponding side. Equalizer beam connection under air suspension transaxle.

Preferably, one side of the air suspension drive axle is provided with a stabilizer bar, the air suspension drive axle is located between the stabilizer bar and the connecting bracket, and the stabilizer bar is fixed on the equalizing beam below the air suspension drive axle , both ends of the stabilizer bar are bent away from the air suspension drive axle, and are respectively connected with vertical stabilizer bar uprights, and the upper ends of the stabilizer bar uprights are used for fixed connection with the vehicle frame.

Compared with the prior art, the double drive axle air suspension assembly of the present invention has the beneficial effects that:

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 double drive axle air suspension assembly. 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 components of the air suspension assembly, optimizes the suspension system, and meets the technical requirements for light weight 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 shock absorber can cooperate with the existing airbag to buffer and reduce the load on the air suspension.

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 spherical, which reduces the production cost, improves the strength and service life of the V-shaped thrust rod mounting seat, simplifies the assembly process of the V-shaped thrust rod assembly, and improves the overall performance of the air suspension. into the overall practicality and stability.

Description of drawings

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

Fig. 2 is a schematic bottom view of the double drive axle air suspension assembly.

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 double drive axle air suspension assembly after installation.

In the figure: 1. Carrying air bag 2, rear drive axle 201, mounting beam 3, stabilizer bar assembly 301, trailer arm 4, connecting bracket 5, lower thrust rod assembly 6, air suspension drive axle 7, lateral stabilizer bar 8 , Gas tank type beam 9, V-shaped thrust rod assembly 10, shock absorber 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.

A double drive axle air suspension assembly, comprising a rear drive axle 2, an air suspension drive axle 6, and connecting brackets 4 on the left and right sides, the rear drive axle 2 and the two ends of the air suspension drive axle 6 are arranged symmetrically There is an equalizing beam 11, each end of each equalizing beam 11 is provided with load-carrying airbags 1, and 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 gas storage tank in the middle and the installation parts at both ends, 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;

V-shaped thrust rod assemblies 9 are installed symmetrically on both sides of the air tank type beam 8, and are connected to the rear drive axle 2 and the air suspension drive axle 6 respectively through the V-shaped thrust rod assembly 9.

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 performance of the double drive axle air suspension assembly. 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 Figures 1-2: the axes of the rear drive axle 2 and the air suspension drive axle 6 are parallel, the rear drive axle 2 is arranged on the right side of the air suspension drive axle 6, and the rear drive axle 2 and the air suspension The axes of the drive axle 6 are located on the same horizontal plane. Both ends of the rear drive axle 2 and the air suspension 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 rear drive axle 2 or the air suspension drive axle 6 and is located on the same horizontal plane.

The middle part of the equalizing beam 11 is fixedly connected with the rear drive axle 2 or the air suspension driving 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 large ends of the two V-shaped thrust rod assemblies 9 are connected to the rear drive axle 2 and the air suspension 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 rear drive axle 2 or the air suspension drive axle 6 through the V-shaped thrust rod mount 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 rear drive axle 2 or the air suspension drive axle 6, which reduces the production cost, improves the strength and service life of the V-shaped thrust rod mounting seat assembly, and simplifies the installation of the V-shaped thrust rod mounting seat assembly. The assembly process improves the overall practicability and stability of the air suspension assembly. There are two V-shaped thrust rod assemblies 9, and are fixedly connected with the rear drive axle 2 and the air suspension drive 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 air suspension drive axle 6 is provided with a stabilizer bar 7, which is in the shape of a "匚" opening to the left, and the vertical part of the stabilizer bar 7 is parallel to the axis of the air suspension drive axle 6, and The axis of the stabilizer bar 7 lies on the horizontal plane. The two ends of the vertical part of the stabilizer bar 7 are respectively fixed on the two equalizing beams 11 below the air suspension 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 horizontal stabilizer bar 7, 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 air suspension 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 to the connecting bracket 4 , and the left end of the lower thrust rod assembly 5 is connected to 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 air suspension drive axle 6, and the upper end of the thrust rod vertical rod is used to connect with the vehicle frame 13 Fixed connection.

As shown in Figures 3 to 4: a stabilizer bar assembly 3 is provided between the rear drive axle 2 and the connecting bracket 4, the stabilizer bar assembly 3 includes the trailer arm 301 and the installation beam 201 of the rear drive axle 2, the axis of the installation beam 201 Parallel to the axis of the air suspension drive axle 6 , there are two trailer arms 301 , and the two trailer arms 301 are symmetrically arranged at both ends of the installation beam 201 and 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 left end of the balance beam 11 at both ends of the rear drive axle 2 is equipped with a shock absorber 10, the shock absorber 10 is vertically arranged, the lower end of the shock absorber 10 is fixedly connected with the balance beam 11, and the upper end is used for fixed connection with the vehicle frame 13 . The shock absorber 10 is located between the rear drive axle 2 and the bearing airbag 1 at the front end of the equalizing beam 11 , so as to cooperate with the bearing airbag 1 to buffer the traction load on the vehicle frame 13 .

and roll angle stiffness displacement loads are distributed to the stabilizer bar assembly 3, which improves the stability and service life of the dual-drive air suspension assembly.

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 double 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 double drive axle air suspension assembly 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 tandem axle air suspension assembly, including rear driving axle（2）, air suspension drive axle（6）And the left and right sides Connecting bracket（4）, rear driving axle（2）With air suspension drive axle（6）Both ends below be arranged with an equalizer （11）, each equalizer（11）Both ends above be equipped with carrying air bag（1）, it is characterised in that：The company of the left and right sides Connect support（4）Between be provided with integral type gas storage pot type crossbeam（8）, gas storage pot type crossbeam（8）Air accumulator including middle part and The installation portion at both ends, 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 fixed to connect Connect；

Gas storage pot type crossbeam（8）Both sides are symmetrically installed with V-type distance rod assembly（9）, and pass through V-type distance rod assembly（9）Respectively With rear driving axle（2）With air suspension drive axle（6）Connection.

2. tandem axle air suspension assembly according to claim 1, it is characterised in that：Described rear driving axle（2）With Connecting bracket（4）Between be provided with stabiliser bar assembly（3）.

3. tandem axle air suspension assembly according to claim 2, it is characterised in that：Described stabiliser bar assembly（3） Including tow arm（301）And rear driving axle（2）Installation crossbeam（201）, tow arm（301）There are two, be symmetricly set on peace Fill crossbeam（201）Both ends, tow arm（301）The both ends connecting bracket with respective side respectively（4）With installation crossbeam（201）Even Connect.

4. tandem axle air suspension assembly according to claim 1, it is characterised in that：Described rear driving axle（2）Two Side is arranged with damper（10）, damper（10）Lower end and equalizer（11）It is connected, upper end is used for and vehicle frame（13）It is fixed to connect Connect.

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

6. tandem 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 rear driving axle（2）With air suspension drive axle （6）It is flexibly connected, V-type distance rod mounting seat is Integral forge type structure.

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

8. tandem axle air suspension assembly according to claim 1, it is characterised in that：Described air suspension drive axle （6）Side be provided with QS（7）, air suspension drive axle（6）Positioned at QS（7）And connecting bracket（4）It Between, QS（7）It is fixed on air suspension drive axle（6）The equalizer of lower section（11）On, QS（7）Both ends To away from air suspension drive axle（6）Direction bending, and vertical stabiliser bar vertical rod is connected to, in stabiliser bar vertical rod Hold and be used for and vehicle frame（13）It is fixedly connected.