CN206306839U - A kind of aerial work platform four-wheel-driven control system - Google Patents

Abstract

The utility model discloses a kind of aerial work platform four-wheel-driven control system, including drive motor, pilot operated directional control valve, flow divider-combiner, Fill valve, orifice valve, low pressure relief valve, check valve, choke valve, solenoid directional control valve, oil pump, brake, change discharge capacity plunger, oil inlet and oil return opening.The beneficial effects of the utility model are：By two independent oil pump feeds, " differential " drives left and right sides motor of the present utility model under realizing steering state；Using assignment of traffic such as flow divider-combiner realizations, and then realize that vehicle synchronous walking function is controlled；Using pilot operated directional control valve, overflow valve, solenoid directional control valve etc., realize that running speed reducer brake is opened, braking and running motor become displacement function.

Description

A kind of aerial work platform four-wheel-driven control system

Technical field

The utility model is related to a kind of four-wheel-driven control system, specially a kind of aerial work platform four-wheel-driven control system, category In control system technical field.

Background technology

With the fast development of China's infrastructure construction, the demand and recoverable amount of engineering machinery also in rapid growth, At the same time, the operating environment that is faced by engineering machinery is more harsh, working condition is increasingly complex, therefore to engineering machinery Requirement also more and more higher.In numerous engineering machinery, running gear is one of its important part, with work System is compared, and running gear not only needs to transmit bigger power, it is desirable to efficiency higher and longer life-span, it is also desirable to In speed change speed governing, differential, change the aspect such as output shaft direction of rotation and reverse transfer power with good ability.

The running gear of existing engineering machinery mainly has two ways：One kind is machine driving, and another kind is hydraulic drive； Wherein, mechanically operated engine average load coefficient is low, therefore can only typically carry out step speed change, and layout type is subject to Limitation.Compared with machine driving, hydraulic drive is easier to realize the control of its kinematic parameter (flow) and kinetic parameter (pressure). Due to high with transmission efficiency, constant power output control can be carried out, fully, system architecture is simple for power utilization, output speed without Level speed governing, forward and reverse can be operated, and Speed rigidity greatly, realized easily waiting outstanding advantages, and hydraulic drive is obtained in engineering machinery by action To being widely applied.

Increase a 4 wheel driven travelling control valve group with flow divider-combiner in pump, the closed circuit of motor, to realize row When walking system works, valve group carries out equivalent shunting or afflux on flow and is not influenceed by load pressure, so as to ensure four motors Speed sync.When vehicle is walked along a direction, if one mouth oil-feed of valve group, a mouth oil return, a small portion of oil inlet Partial pressure oil promotes the pilot operated directional control valve its right position is worked, four part oil returns of motor through the right position of pilot operated directional control valve, check valve, The left position of solenoid directional control valve enters the brake of reductor, opens brake；Meanwhile, most of pressure oil of oil inlet is passed through respectively Enter four drive motors after being shunted by flow divider equivalent, the speed sync of loop motor before and after realizing.

Under usual state, solenoid directional control valve is not charged, and motor maintains huge discharge state, realizes that vehicle low speed is walked.When When vehicle needs to walk at a high speed, solenoid directional control valve is powered, its left position work；Now the pressure oil from pilot operated directional control valve is through electromagnetism The left working position of reversal valve enters into four change discharge capacity plunger cases of motor so that motor maintains small displacement state, realizes car At a high speed walk.When Vehicular turn, the distance that outboard wheels are rolled across is long, and the distance that inboard wheel is rolled across is short, and this requires outer The rotating speed of side hydraulic motor is faster than inner side hydraulic motor.During Vehicular turn, if the wheel of fluid motor-driven is in inner side, its Radius of turn is smaller, then required oil mass is smaller, if being still input into the fluid of equivalent, motor pressure will be caused too high, and by hydraulic pressure The wheel that motor drives is in outside, and its radius of turn is larger, and required oil mass is larger, if being still input into the fluid of equivalent, will lead Cause motor pressure not enough.At this moment, pressure difference is formed at orifice valve two ends, orifice valve works, it is by fluid from the lateral low pressure of high pressure Side supplements, so that " differential " during Vehicular turn drives.If in addition, when vehicle stops suddenly in the process of moving, due to vehicle Effect of inertia, hydraulic motor will be remained in operation the certain negative pressure of generation, and Fill valve is opened, and the fluid of fuel tank is just through check valve and list Respectively enter hydraulic motor to valve, with meet its inertia rotate the need for, vehicle is steadily stopped.

When vehicle is not walked, do not allow solenoid directional control valve powered, its right position work；Four motor brake cavity volume inner fluids In the presence of tripping spring, fuel tank is flow back to through the right position of solenoid directional control valve, choke valve, reductor is to meet car into on-position Drive and to require, using single pump multi-motor closed system more than aerial work platform.As a kind of predictable situation, work as vehicle During steering, the distance that outboard wheels are rolled across is long, and the distance that inboard wheel is rolled across is short, and this requires that the rotating speed of outside hydraulic motor is fast In inner side hydraulic motor.During Vehicular turn, if the wheel of fluid motor-driven is in inner side, its radius of turn is smaller, then institute The oil mass for needing is smaller, if being still input into the fluid of equivalent, motor pressure will be caused too high, and is in by the wheel of fluid motor-driven Outside, its radius of turn is larger, and required oil mass is larger, if being still input into the fluid of equivalent, motor pressure will be caused not enough.This When, pressure difference is formed at orifice valve two ends, orifice valve works, and it supplements fluid from high side to low side, so that vehicle turns To when " differential " drive.If but damping valve opening is too big, under vehicle wheel put-straight state during straight line moving, because of unbalance loading and attachment The difference of power condition causes the asynchronous driving of left and right sides running motor, aggravates the uneven friction of wheel.If damping valve opening It is too small, when being walked under steering state, " differential " miopragia.Left and right sides wheel is big because of speed difference, and system can not be because The flow of corresponding proportion is provided for speed difference, the same aggravation uneven friction of wheel.

Utility model content

The purpose of this utility model is that and provide a kind of aerial work platform 4 wheel driven control in order to solve the above problems System, realizes the speed sync of aerial work platform hoofing part motor, and the system is changed by variable pump, flow divider-combiner, electromagnetism Constituted to valve, pilot operated directional control valve, overflow valve, Fill valve etc., equivalent shunting or equivalent afflux can be realized, hydraulic motor has preferably Speed sync.

The utility model is achieved through the following technical solutions above-mentioned purpose, a kind of aerial work platform 4 wheel driven control system System, including fueller, it is characterised in that：The fueller is made up of the first oil pump and the second oil pump, and the first oil pump and Second oil pump is equipped with the oil inlet connection part flow arrangement of two hydraulic fluid ports, the oil inlet of the first oil pump and the second oil pump, described point Stream device is made up of the first flow divider-combiner, the second flow divider-combiner and the 3rd flow divider-combiner；First flow divider-combiner One end connects the first drive motor, and first drive motor is internally provided with the first change discharge capacity plunger；First shunting There is the second change discharge capacity plunger inside the other end connection second drive motor, and second drive motor of combiner valve；Described Two flow divider-combiner one end connect the 3rd drive motor, and the 3rd drive motor is internally provided with the 3rd change discharge capacity plunger； The other end of second flow divider-combiner connects the 4th drive motor, and the 4th drive motor is internally provided with the 4th change Discharge capacity plunger.The first orifice valve of the first flow divider-combiner parallel connection, and first orifice valve and first flow distributing and collecting Valve junction is respectively communicated with the first Fill valve and the second Fill valve；The second orifice valve of the second flow divider-combiner parallel connection, and institute State the second orifice valve and be respectively communicated with the 3rd Fill valve and the 4th Fill valve with the second flow divider-combiner junction；Described second Oil pump two ends parallel connection pilot operated directional control valve, and the pilot operated directional control valve connection check valve and reversal valve；Reversal valve one end connection The second solenoid directional control valve is connected between first solenoid directional control valve, and the reversal valve and the first solenoid directional control valve；The check valve And first connect choke valve between solenoid directional control valve.

Preferably, the oil return opening of first oil pump connects the second drive motor, the oil return opening connection of second oil pump 4th drive motor.

Preferably, first Fill valve, the second Fill valve, the 3rd Fill valve, the 4th Fill valve, the 5th Fill valve and Six Fill valves are connected.

Preferably, the 5th Fill valve connects the first drive motor, and the 6th Fill valve connects the second oil pump.

Preferably, first becomes discharge capacity plunger, the second change discharge capacity plunger, the 3rd change discharge capacity plunger and the 4th change discharge capacity plunger company It is logical.

Preferably, the oil inlet of first oil pump connects the first flow divider-combiner, the oil inlet A connections of the second oil pump.

Preferably, connected between the first drive motor, the second drive motor, the 3rd drive motor and the 4th drive motor.

The beneficial effects of the utility model are：Left and right sides motor of the present utility model is real by two independent oil pump feeds " differential " driving is turned now under state；Using assignment of traffic such as flow divider-combiner realizations, and then realize vehicle synchronous walking function Control；Using pilot operated directional control valve, overflow valve, solenoid directional control valve etc., realize that running speed reducer brake is opened, brakes and walked Motor becomes displacement function.

Brief description of the drawings

Fig. 1 is hydraulic principle schematic diagram of the present utility model.

In figure：1-1, the first drive motor, 1-2, the second drive motor, 1-3, the 3rd drive motor, 1-4, the 4th drive Motor, 2, pilot operated directional control valve, 3-1, the first flow divider-combiner, 3-2, the second flow divider-combiner, 3-3, the 3rd flow divider-combiner, 4- 1st, the first Fill valve, 4-2, the second Fill valve, 4-3, the 3rd Fill valve, 4-4, the 4th Fill valve, 4-5, the 5th Fill valve, 4-6, 6th Fill valve, 5-1, the first orifice valve, 5-2, the second orifice valve, 6, low pressure relief valve, 7, check valve, 8, choke valve, 9, One solenoid directional control valve, the 10, second solenoid directional control valve, 11-1, the first oil pump, 11-2, the second oil pump, 12-1, the first brake, 12-2, second brake, 12-3, the 3rd brake, 12-4, the 4th brake, 13-1, first become discharge capacity plunger, 13-1, second Become discharge capacity plunger, 13-1, the 3rd become discharge capacity plunger, and 13-1, the 4th become discharge capacity plunger, A1, A2, oil inlet, B1, B2, oil return opening.

Specific embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made The every other embodiment for being obtained, belongs to the scope of the utility model protection.

Embodiment：

As shown in figure 1, a kind of aerial work platform four-wheel-driven control system, including fueller, the fueller is by One oil pump 11-1 and the second oil pump 11-2 is constituted, and the first oil pump 11-1 and the second oil pump 11-2 are equipped with two hydraulic fluid ports, first The oil inlet A1 connection part flow arrangements of the oil inlet A2 of oil pump 11-1 and the second oil pump 11-2, the part flow arrangement is by the first shunting Combiner valve 3-1, the second flow divider-combiner 3-2 and the 3rd flow divider-combiner 3-3 are constituted；Described first flow divider-combiner 3-1 one end The first drive motor 1-1 is connected, and the first drive motor 1-1 is internally provided with the first change discharge capacity plunger 13-1；Described The other end of one flow divider-combiner 3-1 connects the second drive motor 1-2, and the second drive motor 1-2 is internally provided with the Two become discharge capacity plunger 13-2；Described second flow divider-combiner 3-2 one end connects the 3rd drive motor 1-3, and the described 3rd drives Motor 1-3 is internally provided with the 3rd change discharge capacity plunger 13-3；The other end connection the 4th of the second flow divider-combiner 3-2 drives Motor 1-4, and the 4th drive motor 1-4 is internally provided with the first flow divider-combiner 3- described in the 4th change discharge capacity plunger 13-4 1 first orifice valve 5-1 in parallel, and the first orifice valve 5-1 is respectively communicated with the first flow divider-combiner 3-1 junctions One Fill valve 4-1 and the second Fill valve 4-2；The second orifice valve 5-2 of the second flow divider-combiner 3-2 parallel connections, and described second Orifice valve 5-2 is respectively communicated with the 3rd Fill valve 4-3 and the 4th Fill valve 4-4 with the second flow divider-combiner 3-2 junctions；Institute State the second oil pump 11-2 two ends parallel connection pilot operated directional control valve 2, and the pilot operated directional control valve 2 connection check valve 6 and reversal valve 7；It is described The connection of the one end of reversal valve 7 connects the second electromagnetism between first solenoid directional control valve 9, and the solenoid directional control valve 9 of the reversal valve 7 and first Reversal valve 10；Choke valve 8 is connected between the solenoid directional control valve 9 of the check valve 6 and first.

In the utility model, oil return opening B2 the second drive motors of connection 1-2 of the first oil pump 11-1, second oil The oil return opening B1 of pump 11-2 connects the first Fill valve 4-1, the second Fill valve 4-2, the 3rd Fill valve described in the 4th drive motor 1-4 4-3, the 4th Fill valve 4-4, the 5th Fill valve 4-5 and the 6th Fill valve 4-6 connection；5th Fill valve 4-5 connections first drive Motor 1-1, and the 6th Fill valve 4-6 connects the second oil pump 11-2；First becomes discharge capacity plunger 13-1, the second change discharge capacity plunger 13-2, the 3rd become discharge capacity plunger 13-3 and the 4th and become discharge capacity plunger 13-4 connections；The oil inlet A2 of the first oil pump 11-1 connects The oil inlet A1 connections of logical first flow divider-combiner 3-1, the second oil pump 11-2；First drive motor 1-1, the second drive motor 1- 2nd, connected between the 3rd drive motor 1-3 and the 4th drive motor 1-4.

The utility model running gear provides power by two oil pumps, and left and right sides running motor is driven by single oil pump It is dynamic.When wheel is turned in the process of walking, due to the difference of interior outside vehicle turning radius, the both sides wheels speed of travel is not Together, oil pump presses corresponding proportion and provides flow according to angle of turn to both sides motor.When vehicle is become a full member, two oil pumps provide identical Flow, while having the first flow divider-combiner 3-1, the second flow divider-combiner 3-2 in travel control valve, it is ensured that motor before and after left side It is identical with motor speed before and after right side, realize the straight line moving of vehicle.

When vehicle is walked along a direction, if valve group A1, A2 mouthful oil-feed, B1, B2 mouthful oil return, A1 mouthfuls of sub-fraction Pressure oil promotion pilot operated directional control valve 2 makes its right position work, and B1 loop features fluid is through the right position of pilot operated directional control valve 2, check valve 7, electricity The left position of magnetic reversal valve 9 enters the brake of reductor, opens brake；Meanwhile, A1 mouthfuls of most of pressure oil respectively via Enter drive motor before and after right side after the shunting of second flow divider-combiner 3-2 equivalent, realize that the speed of the front and rear loop motor in right side is same Step；A2 mouthfuls of pressure oil enters drive motor before and after left side after being shunted via the first flow divider-combiner 3-1 equivalent respectively, realizes left side The speed sync of front and rear loop motor.

When vehicle is reversely walked, valve group B1, B2 mouthful oil-feed, A1, A2 mouthful of oil return, B1 mouthfuls of sub-fraction pressure oil is promoted Pilot operated directional control valve 2 makes its left position work, and the oil return of A1 loop features is left through the left position of pilot operated directional control valve 2, check valve 7, solenoid directional control valve 9 Position enters the brake of reductor, opens brake.Meanwhile, B1 mouthfuls of most of pressure oil drives before and after being assigned to right side Motor, two, the right side oil return of drive motor is right by, through A1 mouthfuls of oil return, being realized after the second flow divider-combiner 3-2 equivalent affluxs respectively The speed sync of front and rear loop motor；B2 mouthfuls of most of pressure oil is assigned to drive motor before and after left side, the drive of two, left side The oil return of dynamic motor is respectively by through A2 mouthfuls of oil return, realizing the front and rear loop motor in left side after the first flow divider-combiner 3-1 equivalent affluxs Speed sync.

Under usual state, solenoid directional control valve 10 is not charged, and motor maintains huge discharge state, realizes that vehicle low speed is walked. When vehicle needs to walk at a high speed, solenoid directional control valve 10 is powered, its left position work；Now from the pressure oil of pilot operated directional control valve 2 Four change discharge capacity plunger cases of motor are entered into through the left working position of solenoid directional control valve 10 so that motor maintains small displacement shape State, realizes that vehicle high-speed is walked.

When Vehicular turn, the distance that outboard wheels are rolled across is long, and the distance that inboard wheel is rolled across is short, and this requires outside liquid The rotating speed of pressure motor is faster than inner side hydraulic motor.During Vehicular turn, if the first drive motor of left side hydraulic pressure 1-1, the second driving The wheel that motor 1-2 drives is in inner side, and its radius of turn is smaller, then required oil mass is smaller, and right side hydraulic pressure the 3rd drives horse Outside is in up to the wheel that 1-3, the 4th drive motor 1-4 drive, its radius of turn is larger, then required oil mass is larger.Control System controls two oil pump capacities in proportion by left and right sides turning radius ratio.Both sides oil pump is according to steering angle to both sides wheel Flow needed for providing, so as to realize that Ackermann steer angle " differential " drives.

If in addition, when vehicle stops suddenly in the process of moving, due to the effect of inertia of vehicle, hydraulic motor will continue to transport Change the line of production and give birth to certain negative pressure, the first Fill valve 4-1, the second Fill valve 4-2, the 3rd Fill valve 4-3, the 4th Fill valve 4-4 are opened, oil The fluid of case just respectively enters hydraulic motor through check valve and check valve, with meet its inertia rotate the need for, make vehicle steady Parking.

When vehicle is not walked, do not allow solenoid directional control valve 9 powered, its right position work；Oil in four motor brake cavity volumes Liquid flows back to fuel tank in the presence of tripping spring through the right position of the first solenoid directional control valve 9, choke valve 8, by inside reductor One brake 12-1, second brake 12-2, the 3rd brake 12-3 and the 4th brake 12-4 so that reductor enters braking State.

It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned one exemplary embodiment, and And in the case of without departing substantially from spirit or essential attributes of the present utility model, can in other specific forms realize that this practicality is new Type.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and is nonrestrictive, this practicality is new The scope of type limits by appended claims rather than described above, it is intended that the equivalency fallen in claim is contained All changes in justice and scope are included in the utility model.Any reference in claim should not be considered as limitation Involved claim.

Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each implementation method is only wrapped Containing an independent technical scheme, this narrating mode of specification is only that for clarity, those skilled in the art should Specification an as entirety, the technical scheme in each embodiment can also be formed into those skilled in the art through appropriately combined May be appreciated other embodiment.

Claims (7)

1. a kind of aerial work platform four-wheel-driven control system, including fueller, it is characterised in that：The fueller is by first Oil pump (11-1) and the second oil pump (11-2) are constituted, and the first oil pump (11-1) and the second oil pump (11-2) are equipped with two oil Mouthful, the oil inlet (A2) of the first oil pump (11-1) and the oil inlet (A1) of the second oil pump (11-2) connect part flow arrangement, described point Stream device is made up of the first flow divider-combiner (3-1), the second flow divider-combiner (3-2) and the 3rd flow divider-combiner (3-3)；It is described First flow divider-combiner (3-1) one end connects and set inside the first drive motor (1-1), and first drive motor (1-1) There is the first change discharge capacity plunger (13-1)；The other end of first flow divider-combiner (3-1) connects the second drive motor (1-2), And have the second change discharge capacity plunger (13-2) inside second drive motor (1-2)；Described second flow divider-combiner (3-2) one end The 3rd drive motor (1-3) is connected, and the 3rd drive motor (1-3) is internally provided with the 3rd change discharge capacity plunger (13-3)； The other end of second flow divider-combiner (3-2) connects the 4th drive motor (1-4), and the 4th drive motor (1-4) It is internally provided with the 4th change discharge capacity plunger (13-4) first flow divider-combiner (3-1), first orifice valve (5-1) in parallel, and institute State the first orifice valve (5-1) and be respectively communicated with the first Fill valve (4-1) and second with the first flow divider-combiner (3-1) junction Fill valve (4-2)；Second flow divider-combiner (3-2), second orifice valve (5-2) in parallel, and second orifice valve (5-2) The 3rd Fill valve (4-3) and the 4th Fill valve (4-4) are respectively communicated with the second flow divider-combiner (3-2) junction；It is described Second oil pump (11-2) two ends parallel connection pilot operated directional control valve (2), and the pilot operated directional control valve (2) connects check valve (6) and reversal valve (7)；Described reversal valve (7) one end connects the first solenoid directional control valve (9), and the reversal valve (7) and the first solenoid directional control valve (9) Between connect the second solenoid directional control valve (10)；Choke valve (8) is connected between the check valve (6) and the first solenoid directional control valve (9).

2. a kind of aerial work platform four-wheel-driven control system according to claim 1, it is characterised in that：First oil pump The oil return opening (B2) of (11-1) connects the second drive motor (1-2), oil return opening (B1) connection of second oil pump (11-2) the Four drive motors (1-4).

3. a kind of aerial work platform four-wheel-driven control system according to claim 1, it is characterised in that：First repairing Valve (4-1), the second Fill valve (4-2), the 3rd Fill valve (4-3), the 4th Fill valve (4-4), the 5th Fill valve (4-5) and the 6th Fill valve (4-6) is connected.

4. a kind of aerial work platform four-wheel-driven control system according to claim 3, it is characterised in that：5th Fill valve (4-5) connects the first drive motor (1-1), and the 6th Fill valve (4-6) connects the second oil pump (11-2).

5. a kind of aerial work platform four-wheel-driven control system according to claim 1, it is characterised in that：First becomes discharge capacity post Plug (13-1), the second change discharge capacity plunger (13-2), the 3rd change discharge capacity plunger (13-3) are connected with the 4th change discharge capacity plunger (13-4).

6. a kind of aerial work platform four-wheel-driven control system according to claim 1, it is characterised in that：First oil pump The oil inlet (A2) of (11-1) connects the first flow divider-combiner (3-1), oil inlet (A1) connection of the second oil pump (11-2).

7. a kind of aerial work platform four-wheel-driven control system according to claim 1, it is characterised in that：First drive motor Connected between (1-1), the second drive motor (1-2), the 3rd drive motor (1-3) and the 4th drive motor (1-4).