CN207617450U - Mechanical control system for air suspension of double-tire lifting bridge - Google Patents

Abstract

A mechanical control system for a double-tire lifting bridge air suspension comprises an air storage cylinder (1), an altitude valve (2), a lifting air spring (3), an electromagnetic valve (4), a drive axle bearing air spring (5), a lifting axle bearing air spring (6) and an unloading valve (7), wherein the air storage cylinder (1) is connected with the altitude valve (2), the altitude valve (2) is respectively connected with the drive axle bearing air spring (5) and the electromagnetic valve (4), the electromagnetic valve (4) is respectively connected with the lifting air spring (3) and the lifting axle bearing air spring (6), the unloading valve (7) is connected with the electromagnetic valve (4), and the unloading valve (7) is connected with a power supply (9) through an unloading valve switch (8). The load of the lifting axle (15) is controlled to be transferred to the drive axle (13), so that the axle load distribution relation of the drive axle (13) and the lifting axle (15) is freely switched between two modes of equal ratio and preferential driving force, and the driving and braking performance of the whole vehicle is improved.

Description

A kind of twins air suspension of lift bridge mechanical control system

Technical field

The utility model is related to a kind of control device, more specifically to a kind of twins air suspension of lift bridge is mechanical Control system belongs to vehicle chassis technology field.

Background technology

Currently, twins air suspension of lift bridge is applied widely, concrete structure as shown in Fig. 2, including vehicle frame 12, Drive axle air suspension bearing system, air suspension of lift bridge bearing system.Drive axle air suspension bearing system and lift bridge Air suspension bearing system structure, function are identical, and drive axle air suspension bearing system includes that drive axle 13, drive axle V-arrangement push away Straight distance rod 18 under power bar 17 and drive axle, air suspension of lift bridge bearing system include lift bridge 15, lift bridge V-arrangement distance rod 19 and lift bridge under straight distance rod 20.

Referring to Fig. 2, axle load is assigned grade ratios and driving force between the drive axle 13 and lift bridge 15 of twins lift bridge vehicle Preferential both of which influences the braking of vehicle and driveability very big.It is waiting than under allocation model, drive axle 13 and is being promoted The ratio between 15 axle load of bridge is close to 1, and since drive axle 13 is suitable with 15 load of lift bridge, drive axle 13 and lift bridge 15 can be used identical The brake force difference of the brake of specification, two bridges is little, when being not in braking lift bridge 13 shift to an earlier date locking drag sliding phenomenon, favorably In the performance of braking performance of vehicle；But under this kind of pattern at low attachment road surface and relatively light transport goods weight, driving Bridge 13 is susceptible to that driving force is insufficient and slipping phenomenon.Under driving force mode of priority, in low attachment road surface and transport cargo weight When amount is relatively light, the fractional load of lift bridge 15 can be transferred to drive axle 13（At this time if 15 liftoff whole of lift bridge Unloading, then may exceed 13 bearing capacity of drive axle）, be conducive to improve vehicular drive capability；But in this case, due to The load difference of drive axle 13 and lift bridge 15 is larger, if using the brake of same size, 15 meeting of lift bridge when braking Cunning is dragged in locking in advance.

Referring to Fig. 3, and twins lift bridge load distribution relies primarily on air suspension control system realization, air suspension control System mainly has electronic type control system（ECAS）With mechanical control system.Electronic type control system（ECAS）Mainly by handling Device（ECU）, solenoid valve, height sensor, pressure sensor, the compositions such as conducting wire and air pipe line；Its advantage is that being quick on the draw, easily It monitors and shifts in axle load, but amount of parts is more, of high cost, is unfavorable for promoting and applying.Existing mechanical control system Air spring is carried including air tank 1, altitude valve 2, lifting gas spring 3, solenoid valve 4, drive axle carrying air spring 5, lift bridge 6, power supply 9 and switch 11,2 one end of altitude valve are fixed on vehicle frame 12, and the other end is fixed on drive axle 13；But this kind of machine Tool formula control system when low attached road surface drive axle 13 skids, the part axle load of lift bridge 15 can not be transferred to drive axle 13 with Improve driveability.

Invention content

The purpose of this utility model is that being driven for existing twins air suspension of lift bridge mechanical control system The problems such as part axle load of lift bridge is transferred to drive axle, driveability is poor, can not be provided a kind of twins and carried by bridge when skidding Rise bridge air suspension mechanical control system.

To achieve the above object, the technical solution of the utility model is：A kind of twins air suspension of lift bridge machinery Formula control system, including air tank, altitude valve, lifting gas spring, solenoid valve, drive axle carrying air spring and lift bridge carrying are empty Gas spring, the air tank are connected with altitude valve, and the altitude valve carries air spring and electromagnetism with drive axle respectively Valve is connected, and the solenoid valve is connected with lifting gas spring and lift bridge carrying air spring respectively, further includes having feather valve, The feather valve is connected with solenoid valve, and feather valve is connected by unloading threshold switch with power supply.

The drive axle carrying air spring is connected with pressure gauge.

Compared with prior art, the utility model has the beneficial effects that：

1, the utility model is novel, simple in structure, economic and practical, and amount of parts is few, reliability is high, at low cost.

2, feather valve is connected with solenoid valve in the utility model, and feather valve is connected by unloading threshold switch with power supply； And drive axle carrying air spring is connected with pressure gauge.When drive axle skids, feather valve connection, lift bridge carries air spring Inner air is discharged, and air pressure declines, and lift bridge load declines therewith；Drive axle load increases, in order to keep height of car constant, Altitude valve, which is opened, gives drive axle carrying air spring inflation, after air pressure reaches setting limit value, pressure gauge alarm, and cut-out unloading Valve, load transfer completion between drive axle and lift bridge.It is shifted to drive axle to control lift bridge load, makes drive axle and carry It rises the bridge axle lotus relations of distribution wait than the free switching between the preferential both of which of driving force, improves vehicle and drive and braking Energy.

Description of the drawings

Fig. 1 is the utility model structure diagram.

Fig. 2 is existing twins air suspension of lift bridge system structure diagram.

Fig. 3 is existing twins air suspension of lift bridge mechanical type control structure schematic diagram.

In figure, air tank 1, altitude valve 2, lifting gas spring 3, solenoid valve 4, drive axle carrying air spring 5, lift bridge carrying Air spring 6, feather valve 7 unload threshold switch 8, power supply 9, pressure gauge 10, switch 11, vehicle frame 12, drive axle 13, driving bridgework Arm beam 14, lift bridge 15, lift bridge hunched beam 16, drive axle V-arrangement distance rod 17, straight distance rod 18, lift bridge V-arrangement under drive axle Distance rod 19, straight distance rod 20 under lift bridge, lifting gas dumb iron 21, lifting gas spring top plate 22.

Specific implementation mode

The utility model is described in further detail below in conjunction with description of the drawings and specific implementation mode.

Referring to Fig. 1, a kind of twins air suspension of lift bridge mechanical control system is mainly used for 6X2 twins lift bridge vehicles Type chassis airsuspension system, including air tank 1, altitude valve 2, lifting gas spring 3, solenoid valve 4, drive axle carrying air spring 5, Lift bridge carries air spring 6 and feather valve 7.The air tank 1 is connected with altitude valve 2, the altitude valve 2 respectively with Drive axle carrying air spring 5 is connected with solenoid valve 4, and the solenoid valve 4 is empty with lifting gas spring 3 and lift bridge carrying respectively Gas spring 6 is connected；The feather valve 7 is connected with solenoid valve 4, and feather valve 7 is connected by unloading threshold switch 8 with power supply 9 It connects.

Referring to Fig. 1, drive axle carrying air spring 5 is connected with pressure gauge 10.

Referring to Fig. 2, twins air suspension of lift bridge concrete structure is as shown in Fig. 2, including vehicle frame 12, drive axle air suspension Bearing system, air suspension of lift bridge bearing system, drive axle air suspension bearing system and air suspension of lift bridge carrying system Structure, the function of uniting are identical.Drive axle air suspension bearing system includes drive axle 13, drive axle V-arrangement distance rod 17 and drive axle Straight distance rod 18 down, drive axle hunched beam 14 is fixed on drive axle 13, and drive axle carries air spring 5 and is mounted on driving bridgework On arm beam 14, the specific pedestal that air spring 5 is carried for drive axle is separately mounted on drive axle hunched beam 14, and drive axle is held The top for carrying air spring 5 is mounted on by holder on vehicle frame 12, and vertical load is born.Air suspension of lift bridge bearing system packet Straight distance rod 20 under lift bridge 15, lift bridge V-arrangement distance rod 19 and lift bridge is included, lift bridge 15 is dead axle, lift bridge 15 On be fixed with lift bridge hunched beam 16, be specifically bolted on lift bridge 15 for lift bridge hunched beam 16, lift bridge It carries air spring 6 to be mounted on lift bridge hunched beam 16, the specific floor installation for carrying air spring 6 for lift bridge is carrying It rises on bridge hunched beam 16, lift bridge carries 6 top of air spring and is mounted on vehicle frame 12 by holder, bears vertical load.It drives Dynamic 17 one end of bridge V-arrangement distance rod is connected with vehicle frame 12, and 17 other end of drive axle V-arrangement distance rod is connected with drive axle 13；It drives Straight 18 one end of distance rod connects drive axle 13 under dynamic bridge, the fixing bracket under drive axle on straight 18 other end of distance rod and vehicle frame 12 It is connected；Straight distance rod 18 forms four-bar mechanism under drive axle V-arrangement distance rod 17 and drive axle, ensures the movement rail of drive axle 13 Mark, while transmitting longitudinal force and lateral force.19 open end of lift bridge V-arrangement distance rod is connected with vehicle frame 12, lift bridge V-arrangement thrust 19 other end of bar is connected with lift bridge 15；20 one end of straight distance rod connects lift bridge 15 under lift bridge, straight thrust under lift bridge 20 other end of bar is connected with the fixing bracket on vehicle frame 12；Straight 20 groups of distance rod under lift bridge V-arrangement distance rod 19 and lift bridge At four-bar mechanism, ensure the movement locus of lift bridge 15, while transmitting longitudinal force and lateral force.2 one end of altitude valve is mounted on On drive axle 13,2 other end of altitude valve is mounted on vehicle frame 12, and the mounting height of altitude valve 2 and front axle suspension or so height are altogether With decision vehicle height posture；The floor installation of gas spring 3 is lifted on the gas dumb iron 21 of vehicle frame 12,3 top of lifting gas spring with Gas spring top plate 22 on lift bridge 15 is connected, and 21 both ends of gas dumb iron are fixed on vehicle frame 12.

Referring to Fig. 2, twins air suspension of lift bridge vehicle has the characteristics that：1, when the vehicle is fully laden, lift bridge 15 is fallen Ground, by rationally adjusting, the axle load of rear axle distribute, be effectively increased cargo dead-weight, vehicle transport efficiency improved, with 6X4 vehicles；2、 When the vehicle is unladen, lift bridge 15 lifts, and reduces tire wear, reduces oil consumption, reduces turning radius and improves vehicle mobility, together 4X2 vehicles；3, by controlling load transfer between drive axle 13 and lift bridge 15, improve tire and road surface adhesion property, favorably Vehicle drives when zero load, prevents tyre slip；4, chassis is carried using airsuspension system, can reduce wheel dynamic load, is improved Vehicle riding comfort, and empty, fully loaded distance between vehicle frame and vehicle bridge is made to be held essentially constant；Meanwhile it being lifted using lift bridge Gas spring 3 controls the lifting and decline of lift bridge 15, keeps control system overall structure simple, at low cost and easy to operate.

Referring to Fig. 1 to Fig. 2, when distance is less than setting height between the increase of 13 axle load of drive axle, vehicle frame 12 and drive axle 13 When, the upper valve position access of altitude valve 2, air inlet open（Exhaust close）, compressed air comes out from air tank 1, through height Valve 2, solenoid valve 4 respectively enter drive axle carrying air spring 5 and lift bridge carrying air spring 6 is inflated, until air suspension Restore setting height, drive axle 13 and 15 load of lift bridge are of substantially equal, meet etc. and to compare allocation model.When 13 axle load of drive axle subtracts When few, distance is more than setting height between vehicle frame 12 and drive axle 13, and the lower valve position of altitude valve 2 is accessed, Exhaust Open（Into Gas port is closed）, air carries air spring 5 from drive axle and lift bridge carrying air spring 6 comes out, through altitude valve 2, solenoid valve 4 are discharged into air, until air suspension restores setting height.When lift bridge 15 carries, lift bridge carries air spring 6 and inflates, Switch 11 disconnects, and the lower valve position access of solenoid valve 4, lifting gas spring 3 is deflated, and air is discharged through solenoid valve 4 in lifting gas spring 3；When When lift bridge 15 lifts, switch 11 is closed, and the upper valve position access of solenoid valve 4, lifting gas spring 3 is inflated, and lift bridge carries air bullet Spring 6 is deflated.

Referring to Fig. 1 to Fig. 2, when the drive axle 13 of vehicle skids, unloading threshold switch 8 is closed, and feather valve 7 charges lower valve position It connects, lift bridge carrying 6 inside points gas of air spring is discharged by feather valve 7 in air, and lift bridge carries in air spring 6 Air pressure gradually reduces, and the load of lift bridge 15 decreases.At the same time, the load of drive axle 13 increases, vehicle frame 12 and driving Highly become smaller between bridge 13, the upper valve position of altitude valve 2 is driven to access work, compressed air enters drive through altitude valve 2 in air tank 1 Dynamic bridge carrying air spring 5 is inflated, and makes highly to be restored to setting value between vehicle frame 12 and drive axle 13.Solenoid valve 4 is still at this time In cut-off state（Intermediate valve position works）, shifted to drive axle 13 with the load of lift bridge 15, drive axle carries air bullet The internal pressure of spring constantly increases, when reaching setting value（Generally allow maximum load corresponding with drive axle 13, prevents from overloading）, pressure Table 10 starts to alarm, and driver cuts off unloading threshold switch 8, and feather valve 7 powers off；Feather valve 7 is in cut-off state under the action of the spring, Gas circuit is cut off, and exhaust outward stops, load transfer completion between lift bridge 15 and drive axle 13, improves vehicle driving to reach The purpose of performance.

Referring to Fig. 1 to Fig. 2, the utility model in existing air suspension control system by accessing feather valve 7, unloading Threshold switch 8 and pressure gauge 10 unload threshold switch 8, feather valve 7 controls lift bridge carrying when drive axle 13 skids by control Air releases a part in air spring 6, reduces by 15 load of lift bridge, and the load reduction for making it bear increases drive axle 13 and carries Lotus, such drive axle 13 bear load and increase therewith；It is shifted to drive axle 13 to control 15 load of lift bridge, makes drive axle 13 Meet driving force mode of priority with the 15 axle load relations of distribution of lift bridge, improves vehicle driving and braking ability.In pavement conditions When preferable, cancel load transfer function, drive axle 13 and 15 load of lift bridge are of substantially equal, improve braking performance of vehicle.

It, cannot the above content is specific preferred embodiment further detailed description of the utility model is combined Assert that the specific implementation of the utility model is confined to these explanations.For the ordinary skill of the utility model technical field For personnel, without departing from the concept of the premise utility, a number of simple deductions or replacements can also be made, above structure It all shall be regarded as belonging to the scope of protection of the utility model.

Claims (2)

1. a kind of twins air suspension of lift bridge mechanical control system, including air tank（1）, altitude valve（2）, lifting gas spring （3）, solenoid valve（4）, drive axle carry air spring（5）Air spring is carried with lift bridge（6）, the air tank（1）With Altitude valve（2）It is connected, the altitude valve（2）Respectively with driving bearing bridge air spring（5）And solenoid valve（4）It is connected, The solenoid valve（4）Respectively with lifting gas spring（3）Air spring is carried with lift bridge（6）It is connected, it is characterised in that：Also wrap Feather valve is included（7）, the feather valve（7）With solenoid valve（4）It is connected, feather valve（7）By unloading threshold switch（8）With electricity Source（9）It is connected.

2. a kind of twins air suspension of lift bridge mechanical control system according to claim 1, it is characterised in that：It is described Drive axle carry air spring（5）It is connected with pressure gauge（10）.