CN103921675B - A kind of monomotor Power Drive Unit, method and crane - Google Patents

Abstract

The present invention relates to a kind of monomotor Power Drive Unit, method and crane, wherein, monomotor Power Drive Unit includes lower car engine, change speed gear box, get off transfer case, also include center steering transfer case, get on the bus transfer case and get on the bus hydraulic pump, center steering transfer case connects lower car engine or change speed gear box or transfer case of getting off by the first power transmission shaft, center steering transfer case connects, by second driving shaft, transfer case of getting on the bus, the power that lower car engine is provided by center steering transfer case changes direction with through vehicle revolving seat ring, the most again change direction to be transferred to transfer case of getting on the bus, transfer case drive connection of getting on the bus is got on the bus hydraulic pump.The power delivery mode of the monomotor Power Drive Unit that the present invention provides is Purely mechanical, carried out the transmission of power by power transmission shaft and center steering transfer case from engine power system of getting off, work efficiency is higher, and energy loss is relatively low, can guarantee that the various operating mode operations of lifting of getting on the bus.

Description

A kind of monomotor Power Drive Unit, method and crane

Technical field

The present invention relates to engineering machinery field, particularly relate to a kind of monomotor Power Drive Unit, Method and crane.

Background technology

As it is shown in figure 1, in engineering machinery field, mobilecrane is generally divided into by vehicle frame 3 Upper frame part and lower frame part, upper frame part is connected to lower frame part by pivoting support 6.Get off Part generally comprises driver's cabin 1 of getting off, lower car engine and adnexa 2, drive shaft 4, lower frame part Effect be the function playing load-carrying vehicle in the process of moving.Upper frame part generally comprises operation of getting on the bus Room 5, upper car engine and adnexa 7, the effect of upper frame part is to implement hoisting operation, upper frame part During work, need to make 360 degree of revolution actions on lower frame part.

The complete machine dynamical system of mobilecrane has the following two kinds auxiliary plan at present.

1) monomotor dynamical system: a shared electromotor of getting on or off the bus, performs road driving and rises Heavy work；Can solve to a certain extent to get on the bus owing to needs arrange that single dynamical system is caused Space anxiety problem, optimize complete machine distribution of weight, more weight is assigned to stress members On, improve overall performance, reduce complete machine cost, optimize complete machine reward structure.

In view of low cost, simple in construction, working service conveniently, (100 tons of medium and small tonnage crane The dynamical system of general multiplex monomotor form below).On medium and small tonnage crane, get off and send out Motivation is not only car load and provides traveling operation power, and provides hoisting operation for upper vehicle hydraulic system Power.By center steering body, it is achieved the transmission of get on or off the bus hydraulic oil power and electric signal.Single Engine power transmission form uses hydraulic pressure transfer, and driving hydraulic pump of getting off provides power to hydraulic oil, Power, after center steering body is changed, drives the parts such as motor of getting on the bus to work by hydraulic oil.

As in figure 2 it is shown, when at lower vehicle travelling state, change speed gear box or the power takeoff of transfer case of getting off Output function is closed, and power is from the lower car engine 11 → clutch being positioned on vehicle frame below plane 10 12 → change speed gear box, 13 → power transmission shaft 14 → get off transfer case 22 → power transmission shaft 23 and drive shaft 24 are carried out Transmission, it is achieved driving functions of getting off.When getting on the bus hoisting operation state, change speed gear box or get off point The power takeoff output function of dynamic case is opened, and transfer case of getting off is in neutral state, and power is sent out from getting off Motivation 11 → clutch, 12 → change speed gear box, 13 → power transmission shaft 14 → transfer case 22 → power transmission shaft of getting off 15 → hydraulic pump, 16 → hydraulic oil pipe, 17 → center steering body 18 → hydraulic oil pipe, 19 → hydraulic pressure of getting on the bus Valve 20 → hydraulic motor 21 of getting on the bus transmits, it is achieved hoisting operation function of getting on the bus.

For medium and small tonnage crane existing monomotor arrangements of power system, mainly there is following asking Topic.When using pure hydraulic transmission mode, hydraulic oil container, main pump need all to be arranged in get off, by Relatively big in hydraulic oil container, main pump own dimensions, arrange, to get off, the requirement that proposition is the highest.Center Revolving body needs the hydraulic channel of about 20, then the structure of center steering body self will be suitable Complexity, manufacturing difficulty of processing cannot estimate.Owing to using the arrangement form of center steering body, get on the bus Open type hydraulic system cannot be applied, and the pressure of hydraulic system is set up by center steering body, energy passes The impact such as pass relatively big, directly affect the work efficiency got on the bus.

2) double engine automobile power system: lower car engine provides car load driving dynamics, upper car engine Hoisting operation power is provided.In view of working performance, system control mode, liquid electricity system of getting on or off the bus The factors such as communication, current hoister in large tonnage (more than 100 tons) uses the power of twin-engined form more System.

Using double engine automobile power system, at low ambient temperatures, crane electromotor easily occurs The problem of starting difficulty.On hoister in large tonnage, car engine is joined directly together with transfer case at present, and Hydraulic system is directly connected to transfer case.When electromotor starts, starter motor with transfer case, Hydraulic oil pump works together, and the load resistance of the most whole drive system is relatively big, especially at low temperature ring Under border, in transfer case inner engine oil, Hydraulic Power Transmission System, hydraulic oil viscosity increases so that starter motor The moment of resistance overcome is needed to increase, the torque capacity that even can be provided by beyond starter motor, thus Electromotor is caused to start.And the transfer case of getting on the bus of large-tonnage crane cannot be installed at present Clutch, it is impossible to use the connected mode of electromotor-clutch-gearbox.And use twin-engined Configuration, needs the engine accessory power ratings such as the two independent air filters of set, radiator, deafener, and weight is relatively Weight, relatively costly.

Along with the sustainable development in market, monomotor system is with its low cost, lightweight, electromotor The advantage of maintenance low cost, starts to obtain the attention of marketing users；Meanwhile, have benefited from starting Machine and the continuous progress of complete machine dynamical system optimisation technique, along with sending out of engine electric-controlled spraying technique Exhibition, carries out closed loop control regulation according to load feedback, makes electromotor be in the work of economical operation region. More and more main engine plants are in view of supporting monomotor dynamical system on hoister in large tonnage Scheme, but there is presently no the most perfect solution.

Summary of the invention

For the problems referred to above, the purpose of the present invention is to propose to a kind of monomotor Power Drive Unit, Method and crane, wherein, monomotor Power Drive Unit is applicable not only to medium and small tonnage lifting Machine, applies also for hoister in large tonnage, and work efficiency is higher, and energy loss is relatively low.

For achieving the above object, the invention provides a kind of monomotor Power Drive Unit, bag Include lower car engine, change speed gear box, transfer case of getting off, also include center steering transfer case, get on the bus point Dynamic case and hydraulic pump of getting on the bus, described center steering transfer case by the first power transmission shaft connect described under Car engine or described change speed gear box or described in get off transfer case, described center steering transfer case passes through Second driving shaft is got on the bus transfer case described in connecting, and described getting off is sent out by described center steering transfer case The power change direction that motivation provides, with through vehicle revolving seat ring, changes direction the most again to pass Get on the bus described in being handed to transfer case, described in get on the bus hydraulic pump of getting on the bus described in transfer case drive connection.

One, preferably or in alternative embodiment, described center steering transfer case is arranged in vehicle frame At heart revolution, described center steering transfer case includes that lower house and upper shell, described upper shell set Putting and getting on the bus, described upper shell is arranged on gets off, and passes through tooth inside described center steering transfer case Wheel engagement and through-drive will get off power to transmission of getting on the bus.

One, preferably or in alternative embodiment, the lower house of described center steering transfer case passes through transfer On case revolving seat ring is arranged on and gets off, the upper shell of described center steering transfer case is returned by transfer case Turning on supporting is arranged on and gets on the bus, described lower house is the most corresponding with described upper shell passes through described transfer Case revolving seat ring and described transfer case pivoting support realize mutually rotating.

Preferably or in alternative embodiment, input cone tooth in described center steering transfer case, it is provided with one Wheel shaft, through bevel gear shaft and output bevel gear wheel shaft, power is through described input bevel gear shaft, described Through bevel gear shaft is delivered to described output bevel gear wheel shaft.

Preferably or in alternative embodiment, revolution electricity in described center steering transfer case, it is provided with one Brush, the fixing electricity loop section of described revolution brush and movable conducting strip part are correspondingly arranged at institute respectively State in upper shell and the lower house of center steering transfer case, by the fixing electricity ring of described revolution brush The mutual of electrical control signal of partly getting on or off the bus with the realization of movable conducting strip part is transmitted.

Preferably or in alternative embodiment, described lower car engine arranges clutch one, described The power that lower car engine produces is delivered to described change speed gear box by described clutch.

One preferably or in alternative embodiment, described in transfer case of getting off got off power transmission shaft by connection With drive shaft of getting off, power is assigned on front driving axle and rear driving axle.

, adopt between described lower car engine and described change speed gear box preferably or in alternative embodiment one With Full-power takeoff, described in the get off power taking mouth of transfer case be provided with disengaging gear, it is achieved take The opening and closing of power mouth output function.

For achieving the above object, present invention also offers one to fill based on monomotor power drive The monomotor power-driven method put, described monomotor Power Drive Unit includes getting off and starts Machine, change speed gear box, transfer case of getting off, also include center steering transfer case, the transfer case and getting on the bus of getting on the bus Hydraulic pump, described center steering transfer case by the first power transmission shaft connect described in get off transfer case, Described center steering transfer case by second driving shaft connect described in get on the bus transfer case, described single-shot Motivation power-driven method comprises the following steps:

When at lower vehicle travelling state, described in the get off power taking mouth output function of transfer case close, dynamic Power is successively from lower car engine → change speed gear box → the 3rd power transmission shaft → transfer case of getting off → power transmission shaft of getting off With drive shaft of getting off, transmit, it is achieved driving functions of getting off；

When getting on the bus hoisting operation state, described in the get off power taking mouth output function of transfer case open, Described transfer case of getting off is in neutral state, and power is successively from lower car engine → change speed gear box → 3rd Power transmission shaft → transfer case → the first power transmission shaft of getting off → center steering transfer case → second driving shaft → on Car transfer case, transmits, and drives hydraulic actuating mechanism of getting on the bus, it is achieved hoisting operation function.

For achieving the above object, present invention also offers a kind of crane, including getting on the bus and getting off, Also include the monomotor Power Drive Unit in any of the above-described embodiment.

Based on technique scheme, the present invention at least has the advantages that

The power delivery mode of the monomotor Power Drive Unit that the present invention provides is Purely mechanical , from engine power system of getting off, carry out power by power transmission shaft and center steering transfer case Transmission, work efficiency is higher, compares pure hydraulic type, and energy loss is relatively low, can guarantee that and has got on the bus The various working conditions of weight, it is adaptable to hoister in large tonnage lift heavy operating mode is many, high pulling torque, high rotating speed Power demand.

Accompanying drawing explanation

Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the application A part, the schematic description and description of the present invention is used for explaining the present invention, not structure Become inappropriate limitation of the present invention.In the accompanying drawings:

Fig. 1 is crane appearance schematic diagram of the prior art；

Fig. 2 is the hydraulic power transfer route letter of monomotor dynamical system of the prior art Figure；

The mechanical power transfer route of the monomotor Power Drive Unit that Fig. 3 provides for the present invention Sketch；

The structure diagram of the center steering transfer case that Fig. 4 provides for the present invention.

Detailed description of the invention

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in embodiment is carried out clearly Chu, it is fully described by.Obviously, described embodiment is only a part of embodiment of the present invention, Rather than whole embodiments.Based on embodiments of the invention, those of ordinary skill in the art are not having Have and make the every other embodiment obtained under creative work premise, broadly fall into present invention protection Scope.

In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ", "front", "rear", "left", "right", " vertically ", " level ", " top ", " end ", " interior ", " outward " Deng instruction orientation or position relationship be based on orientation shown in the drawings or position relationship, be only for It is easy to describe the present invention and simplifying describe rather than instruction or the device of hint indication or element Must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that right The restriction of scope.

First the technical term used in the present invention is explained.

Mobilecrane: a kind of equipment for the weight that hoists, is arranged on dependence tire construction and moves On dynamic chassis.

Change speed gear box: with the device of several speed ratios transmission power in vehicle.Change speed gear box function: change Gear ratio, expands driving wheel torque and the excursion of rotating speed, to adapt to the traveling bar often changed Part, as vehicle start, accelerate, upward slope etc., make electromotor work under favourable operating mode simultaneously； There is neutral gear to interrupt power transmission, to enable the engine to starting, idling, and be easy to variator Gear shift or carry out power output.

Clutch: rely on tribology principle transmission engine power, there is separation and combine two states. Being temporarily switched off engine power output during released state, most of the time clutch is in engagement state, Ensure to transmit engine power reliably.

Transfer case: parts in car load power drive system, its internal structure is a series of tooth Wheels, its major function has adjustment transmission speed ratio, increase power taking mouth, transmits and distribute driving power Deng.

Power transmission shaft: for transmitting a kind of mechanism of driving force, is usually by universal joint, central siphon, stretches Contracting splines etc. form, for longer rotary shaft, in addition it is also necessary to there is intermediate support.

Hydraulic drive: the change by liquid transmission medium static pressure energy transmits energy, mainly by oil Pump, hydraulic motor and control device etc. form.The mechanical energy of electromotor output is converted into by oil pump Hydraulic energy, is converted into mechanical energy by hydraulic motor by hydraulic energy the most again.

As it is shown on figure 3, the monomotor Power Drive Unit that the present invention provides, including being positioned at vehicle frame Lower car engine 102, change speed gear box 104 below plane 101, transfer case 106 of getting off, also include Center steering transfer case 108, and it is positioned at the transfer case 110 of getting on the bus above vehicle frame plane 101 With hydraulic pump 111 of getting on the bus, center steering transfer case 108 can by the first power transmission shaft 107 even Connecing the power taking mouth of transfer case 106 of getting off, center steering transfer case 108 can also be by the first biography Moving axis 107 is directly connected to the power taking mouth of lower car engine 102, or is directly connected to change speed gear box 104 Power taking mouth, center steering transfer case 108 connects, by second driving shaft 109, transfer case of getting on the bus 110, the power that lower car engine 102 is provided by center steering transfer case 108 changes direction to wear Cross vehicle revolving seat ring, the most again change direction to be transferred to transfer case 110 of getting on the bus, get on the bus point Dynamic case 110 drive connection is got on the bus hydraulic pump 111, and hydraulic pump 111 of getting on the bus is for lifting execution machine of getting on the bus Structure provides power, it is ensured that the power resources of upper vehicle hydraulic system, it is achieved the hoisting operation function got on the bus.

Above-described embodiment can by lower car engine 102 provide power drive get on the bus lifting perform machine Structure, can not only realize the traveling operation function of car load, and can realize the hoisting operation function got on the bus.

The power delivery mode of above-described embodiment is Purely mechanical, from lower car engine 102 power Carried out the transmission of power in system by power transmission shaft and center steering transfer case 108, work efficiency is relatively Height, compares pure hydraulic type, and energy loss is relatively low, it is possible to ensure get on the bus lifting various operating modes make Industry.

As shown in Figure 4, the center steering transfer case 108 that the present invention provides is arranged on the center of vehicle frame At revolution, and the central axis of center steering transfer case 108 is coaxial with the center steering of vehicle frame, in Heart revolution transfer case 108 can include upper shell 1081 and lower house 1082.Lower house 1082 sets Putting and getting off, upper shell 1081 is arranged on gets on the bus, and upper shell 1081 and lower house 1082 can phases To rotation.Center steering transfer case 108 is internal can be provided with gear and power transmission shaft, passes through gear Engagement, transmission shaft driven realize power of getting off to the transmission got on the bus.

In above-described embodiment, the lower house 1082 of center steering transfer case 108 can pass through transfer case On revolving seat ring 1083 is arranged on and gets off, the upper shell 1081 of center steering transfer case 108 is permissible Be arranged on by transfer case pivoting support 1084 on getting on the bus, and transfer case revolving seat ring 1083 with point Dynamic case pivoting support 1084 can mutually rotate, and lower house 1082 is the most corresponding with upper shell 1081 Realize mutually rotating by transfer case revolving seat ring 1083 and transfer case pivoting support 1084.Shift fork 1085 can be fixed on and get on the bus, when get on the bus rotation time, drive the upper casing of center steering transfer case 108 Body 1081 rotates, and the upper shell 1081 which achieves center steering transfer case 108 returns with center Turn the mutual rotation of the lower house 1082 of transfer case 108.

In above-described embodiment, in center steering transfer case 108, input bevel gear shaft can be provided with 1086, through bevel gear shaft 1087 and output bevel gear wheel shaft 1088, crane descending engine system Power be delivered on the input bevel gear shaft 1086 in center steering transfer case 108, by cone tooth Engagement between wheel, through the transmission of through bevel gear shaft 1087, transfers power to center steering and divides On the output bevel gear wheel shaft 1088 of dynamic case 108, output bevel gear wheel shaft 1088 passes through second driving shaft 109 connect transfer case 110 of getting on the bus, and drive the lifting actuator got on the bus, it is achieved will get off dynamic Power is to the transmission got on the bus.

The present invention provide center steering transfer case 108 as an assembly, its upper shell 1081 He The rotation of lower house 1082 is by transfer case pivoting support 1084 and transfer case revolving seat ring 1083 Coordinate to rotate and realize, work process is difficult to variation deviation, alignment is preferable, it is to avoid partially Heart bearing capacity, stability of rotation is reliable.

The present invention is except realizing power of getting off to getting on the bus by center steering transfer case 108 Transmission transfer, it is also possible to the signal of electrical system of being got on or off the bus by center steering transfer case 108 realization Transmission.Revolution brush 1089 can be set in center steering transfer case 108, by revolution brush 1089 forms realize getting on or off the bus the mutual transmission of electrical control signal.Fixing of revolution brush 1089 Electricity loop section and the movable conducting strip part corresponding upper casing being fixed on center steering transfer case 108 respectively On body 1081 and lower house 1082, and with rotating therewith, the electric signal got on or off the bus is passed through Fixing electricity ring and the movable conducting strip of the revolution brush 1089 on center steering transfer case 108 are effective Complete transfer function, it is achieved the car load electrical control signal in crane turning course mutual Transmission, the electrical system that makes to get on or off the bus becomes a controllable system by revolution brush 1089.

In above-described embodiment, lower car engine 102 can also arrange clutch 103, get off The power that electromotor 102 produces is delivered to change speed gear box 104 by clutch 103, passes through speed change The gear regulation of case 104 changes different speed ratio, to realize the traveling demand of different operating mode.

In above-described embodiment, power is passed to down by change speed gear box 104 by connecting the 3rd power transmission shaft 105 Car transfer case 106, transfer case 106 of getting off can be got off power transmission shaft 112 by connection and be driven with getting off Moving axis 113, can be assigned to power on front driving axle and rear driving axle, it is achieved the traveling merit of car load Energy.

In above-described embodiment, power transmission shaft can be connected at the power taking mouth got off on transfer case 106, will Power is delivered on center steering transfer case 108, and the power taking mouth of transfer case 106 of getting off can be arranged Disengaging gear, the opening of power taking mouth output function of the transfer case 106 that realizes getting off by disengaging gear Open and close.

In above-described embodiment, center steering transfer case 108 can also be directly from lower car engine 102 Or power taking at the power taking mouth on change speed gear box 104, replace power taking from transfer case 106 of getting off, equally Can be transferred to get on the bus by the power got off, in driving, mechanism of car completes hoisting operation function.

The monomotor Power Drive Unit that the present invention provides, can pass through center steering transfer case The power conversion that transfer case 106 of getting off is passed over by 108 passes to get on the bus, center steering transfer case The upper shell 1081 of 108 can rotate with getting on the bus.

Use the monomotor Power Drive Unit in any of the above-described embodiment, mainly have following two Power delivery status.

When at lower vehicle travelling state, the output function of the power taking mouth of transfer case 106 of getting off is closed, Power is successively from lower car engine 102 → clutch, 103 → change speed gear box the 104 → the 3rd power transmission shaft 105 → transfer case 106 → power transmission shaft 112 → drive shaft 113 of getting off of getting off of getting off, transmits, real Now car driving functions.

When the power taking mouth output when getting on the bus hoisting operation state, at transfer case 106 power shaft of getting off Function is opened, and transfer case 106 of getting off is in neutral state, power successively from lower car engine 102 → 105 → transfer case 106 → the first transmission of getting off of clutch 103 → change speed gear box the 104 → the 3rd power transmission shaft Axle 107 → center steering transfer case 108 → second driving shaft 109 → get on the bus transfer case 110 → get on the bus Hydraulic pump 111, transmits, and drives hydraulic actuating mechanism of getting on the bus, it is achieved hoisting operation function.

The lower car engine 102 of the present invention is with clutch 103, the power taking mouth of transfer case 106 of getting off With disengaging gear, when carrying out hoisting operation when getting on the bus, can taking by transfer case 106 of getting off The opening and closing of power mouth realizes the transmission of power, can be realized by the opening and closing of the power taking mouth of clutch 103 Lower car engine 102 starts in an unloaded situation, it is to avoid time car engine 102 by Big in load resistance, the problem of difficulty in starting at low ambient temperatures.

For obtaining bigger moment of torsion, it is also possible to adopt between lower car engine 102 and change speed gear box 104 With Full-power takeoff, carry out power transmission by auxiliary drive.

Present invention also offers a kind of crane, this crane includes getting on the bus and getting off, also includes State the monomotor Power Drive Unit in any embodiment.By using monomotor power drive Device, lifting actuator of getting on the bus can be driven by the power of lower car engine 102 transmission. The power provided by lower car engine 102, can not only realize the traveling operation function of car load, and And the hoisting operation function got on the bus can be realized.

The crane that the present invention provides uses monomotor Power Drive Unit, gets on or off the bus shared one Electromotor, can solve to get on the bus owing to needs arrange that single dynamical system is caused to a certain extent Space anxiety problem, optimize complete machine distribution of weight (more weight is assigned to stress members On, improve overall performance), weight saving, reduces complete machine cost, optimizes complete machine reward structure.

The crane that the present invention provides uses monomotor Power Drive Unit, and eliminating gets on the bus starts Machine and related accessories thereof, weight saving；In use, due to it may happen that the parts of fault Reducing, continuous time between failures and lifting reliability favorably improved, and only need to under One electromotor of car carries out ordinary maintenance maintenance operation, reduces maintenance cost.

In sum, the present invention provide monomotor Power Drive Unit power transmission route with And arrangement form, it is possible to be applicable to hoister in large tonnage, and be capable of getting off engine power to The mechanical type transmission got on the bus.

Finally should be noted that: above example only in order to technical scheme to be described and Non-to its restriction；Although the present invention being described in detail with reference to preferred embodiment, affiliated The those of ordinary skill in field is it is understood that still can enter the detailed description of the invention of the present invention Row is revised or portion of techniques feature is carried out equivalent；Without deviating from technical solution of the present invention Spirit, it all should be contained in the middle of the technical scheme scope that the present invention is claimed.

Claims (8)

1. a monomotor Power Drive Unit, including lower car engine, change speed gear box, gets off Transfer case, it is characterised in that: also include center steering transfer case, get on the bus transfer case and liquid of getting on the bus Press pump, described center steering transfer case connects described lower car engine or institute by the first power transmission shaft State change speed gear box or described in get off transfer case, described center steering transfer case is by second driving shaft even Getting on the bus described in connecing transfer case, it is dynamic that described lower car engine is provided by described center steering transfer case Power change direction, with through vehicle revolving seat ring, the most again changes direction and gets on the bus described in being transferred to Transfer case, described in get on the bus hydraulic pump of getting on the bus described in transfer case drive connection；

Described center steering transfer case is arranged at the center steering of vehicle frame, and described center steering divides Dynamic case includes lower house and upper shell, and described upper shell is arranged on gets on the bus, and described lower house is arranged Getting off, described center steering transfer case is internal will be got off power by gear engagement and through-drive To transmission of getting on the bus；

On the lower house of described center steering transfer case is arranged on by transfer case revolving seat ring and gets off, On the upper shell of described center steering transfer case is arranged on by transfer case pivoting support and gets on the bus, described Lower house and described upper shell are corresponding respectively to be returned by described transfer case revolving seat ring and described transfer case Turn supporting to realize mutually rotating.

2. monomotor Power Drive Unit as claimed in claim 1, it is characterised in that: institute Input bevel gear shaft, through bevel gear shaft and output bevel gear wheel it is provided with in stating center steering transfer case Axle, power is delivered to described output bevel gear through described input bevel gear shaft, described through bevel gear shaft Wheel shaft.

3. monomotor Power Drive Unit as claimed in claim 1, it is characterised in that: institute Revolution brush it is provided with, the fixing electricity loop section of described revolution brush in stating center steering transfer case With upper shell and the lower casing that movable conducting strip part is correspondingly arranged at described center steering transfer case respectively Internal, fixing electricity loop section and movable conducting strip part by described revolution brush realize getting on or off the bus The mutual transmission of electrical control signal.

4. monomotor Power Drive Unit as claimed in claim 1, it is characterised in that: institute State and clutch be set on lower car engine, described lower car engine produce power by described from Clutch is delivered to described change speed gear box.

5. monomotor Power Drive Unit as claimed in claim 1, it is characterised in that: institute State transfer case of getting off get off power transmission shaft by connection and get off drive shaft, power is assigned to forerunner On dynamic bridge and rear driving axle.

6. monomotor Power Drive Unit as claimed in claim 1, it is characterised in that: institute State between lower car engine and described change speed gear box employing Full-power takeoff, described in get off transfer case Power taking mouth be provided with disengaging gear, it is achieved the opening and closing of power taking mouth output function.

7. the monomotor power of a monomotor Power Drive Unit based on claim 1 Driving method, it is characterised in that described monomotor Power Drive Unit include lower car engine, Change speed gear box, transfer case of getting off, also include center steering transfer case, get on the bus transfer case and liquid of getting on the bus Press pump, described center steering transfer case is by transfer case of getting off described in the first power transmission shaft connection, institute State center steering transfer case by second driving shaft connect described in get on the bus transfer case, described single-shot moves Mechanomotive force driving method comprises the following steps:

When at lower vehicle travelling state, described in the get off power taking mouth output function of transfer case close, dynamic Power is successively from lower car engine → change speed gear box → the 3rd power transmission shaft → transfer case of getting off → power transmission shaft of getting off With drive shaft of getting off, transmit, it is achieved driving functions of getting off；

When getting on the bus hoisting operation state, described in the get off power taking mouth output function of transfer case open, Described transfer case of getting off is in neutral state, and power is successively from lower car engine → change speed gear box → 3rd Power transmission shaft → transfer case → the first power transmission shaft of getting off → center steering transfer case → second driving shaft → on Car transfer case, transmits, and drives hydraulic actuating mechanism of getting on the bus, it is achieved hoisting operation function.

8. a crane, including getting on the bus and getting off, it is characterised in that: also include claim Monomotor Power Drive Unit described in any one of 1-6.