CN107618324A - A kind of combined hydraulic crawler excavator walking switching mechanism - Google Patents
A kind of combined hydraulic crawler excavator walking switching mechanism Download PDFInfo
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Abstract
The invention discloses a kind of combined hydraulic crawler excavator walking switching mechanism, including hydraulic system and mechanical structure；The mechanical structure includes being arranged on the preceding walking switching mechanism on front side of chassis of dredging machine lower section and the rear walking switching mechanism installed in chassis of dredging machine lower section rear side, and switching mechanism of being walked before described is identical with the structure of the rear switching mechanism of walking and is symmetrical arranged；Also include vehicle lowering or hoisting gear hydraulic cylinder, its upper end is fixedly connected with chassis of dredging machine, and lower end is connected to knuckle-tooth wheel disc, and knuckle-tooth wheel disc coordinates with square chassis below；The hydraulic system includes mailbox, hydraulic pump, vehicle slewing equipment, vehicle lowering or hoisting gear and track steel wheel draw off gear.The present invention can rely on the walking switching mechanism of itself to complete the action of upper rail in the case where not damaging rail, then from highway pattern switching to railroad mode, and need not be by special level crossing, or artificially separately lay railway ballast.
Description
Technical field
The present invention relates to the walking mechanism of a kind of track and road convertible vehicle, and in particular to a kind of combined hydraulic pressure
Excavator walking switching mechanism.
Background technology
China railways mileage number is located at world forefront, and high-speed railway mileage number is even more to be located at the first in the world.With urbanization
The propulsion of process, increasing city start to build subway.The railway system needs to undertake heavy passenger and freight transportation task, therefore
Rail cleaning and along the line maintenance seem increasingly important.Excavator is widely used in a variety of industries of the development of the national economy, in work
Irreplaceable effect is played in Cheng Jianshe.The walking mechanism of conventional hydraulic excavator is crawler type or wheeled, and majority is general
Operation under road conditions, when carrying out railroad maintenance, typically moved to by towing vehicle and operation is carried out after appointed place is unloaded.Existing rail-road
Dual-purpose hydraulic excavator need level crossing or on railway lay railway ballast after complete highway-railroad mode conversion.Before
A kind of mode requires specific place, and latter can cause damage to rail.
According to retrieval, has road rail vehicle walking mechanism converting system at present, such as publication No. CN103332081B China
Patent application discloses a kind of combined tractor, including guider, draw-gear, brake apparatus, it is characterised in that also
Including vertically rail device, the vertically rail device includes base, rotary support seat and multigroup lift drive mechanism, institute
State and connected between base and the rotary support seat by rotary support mechanism, the lower end of the base is respectively arranged with and two iron
The positioning table that rail is engaged；Lift drive mechanism is made up of outer column, inner column and hoist cylinder described in every group, the outer column
It is enclosed on outside the inner column.And for example publication No. is that CN102963227A Chinese patent application discloses a kind of combined digging
Pick machine railway train lifts and drive device, including：Vehicle frame and shoveling, shoveling, the shoveling are hinged with front of the vehicle frame
Rear a pair of driven is installed, be hinged with preceding hydraulic jack between vehicle frame front end in the middle part of the rear of the shoveling, pass through
Hydraulic jack drives shoveling to lift driven pulley；The rear of the vehicle frame is hinged with active wheel support, is installed on active wheel support
There are a pair of driving wheels, and rear hydraulic jack is hinged between vehicle frame rear end in the middle part of the rear of active wheel support, pass through rear hydraulic pressure
Oil cylinder drives active wheel support to lift driving wheel, and the driving wheel passes through fluid motor-driven.
In place of the equal Shortcomings of above two road rail vehicle walking mechanism conversion equipment technical scheme, the first technical side
Case needs to allow road rail vehicle to open to level crossing, completes highway-railroad mode conversion.Second of technical scheme passes through existing
The be hinged railway train that lifting can be driven by hydraulic system in the front and back of crawler-mounted excavator vehicle frame, excavates common crawler type
Machine can be needed also exist for by the specific place similar to level crossing along railway operation.
The content of the invention
The invention provides a kind of combined hydraulic crawler excavator walking switching mechanism, to realize hydraulic crawler excavator in public affairs
Walking conversion on road and railway.
In order to solve the above technical problems, the technical solution adopted in the present invention is：
A kind of combined hydraulic crawler excavator walking switching mechanism, including mechanical structure and hydraulic system；
The mechanical structure includes being arranged on the preceding walking switching mechanism of chassis of dredging machine lower section front side and installed in excavation
The rear walking switching mechanism of rear side below machine chassis；Walking switching mechanism includes a wheel shaft, the left end of wheel shaft and the right side before described
End is connected to a track steel wheel；
The wheel shaft on the inside of track steel wheel before described on the left of walking switching mechanism is provided with a Collapsible support device；It is described
Collapsible support device includes the first connector and the second connector, and the first connector and the second connector are connected to left side after coordinating
On wheel shaft on the inside of track steel wheel, the top of the second connector is fixedly connected with the bottom of connecting rod, the top of connecting rod
It is hinged with the 3rd connector, the 3rd connector is fixedly connected with chassis of dredging machine；The track steel wheel for also including being inclined to set is received
Tapping cylinder pressure, the cylinder bucket at the top of it are hinged with chassis of dredging machine, and the piston rod of its bottom is hinged to the side of connecting rod；
The wheel shaft on the inside of track steel wheel before described on the right side of walking switching mechanism is provided with left side identical folding support
Device；
Walking switching mechanism is identical with the structure of the preceding walking switching mechanism after described and is symmetrical arranged；
Also include vehicle lifting hydraulic cylinder, its upper end is fixedly connected with chassis of dredging machine, and lower end is connected to knuckle-tooth wheel disc, circle
Toothed disc coordinates with square chassis below；Hydraulic motor and decelerator are provided with by ring flange on square chassis, slowed down
The ring gear of device engages with the external toothing of knuckle-tooth wheel disc, so as to drive excavator vehicle to rotate clockwise or counterclockwise；
The hydraulic system includes fuel tank, hydraulic pump, vehicle slewing equipment, vehicle lowering or hoisting gear and track steel wheel folding and unfolding dress
Put；Hydraulic pump and motor connection, the oil inlet of filter are connected to fuel tank, and the oil-out of filter is connected to the oil-feed of hydraulic pump
Mouthful, the oil-out of hydraulic pump is connected to vehicle slewing equipment, vehicle lowering or hoisting gear, track steel wheel draw off gear and the 3rd and overflow simultaneously
The oil inlet of valve is flowed, the oil-out of the 3rd overflow valve is connected to fuel tank.
According to such scheme, the vehicle slewing equipment includes decelerator, hydraulic motor, hydraulic control locking system, the first list
To valve, the second check valve, the first overflow valve, the second overflow valve and the first three-position four-way electromagnetic directional valve；The oil-out of hydraulic pump
The first hydraulic fluid port of the first three-position four-way electromagnetic directional valve is connected to, the 3rd hydraulic fluid port of the first three-position four-way electromagnetic directional valve connects simultaneously
It is connected to the oil inlet, the oil-out of the first check valve and the oil inlet of hydraulic motor of the first overflow valve；The oil-out of hydraulic motor
It is connected to the 4th of the oil-out of the second check valve, the oil inlet of the second overflow valve and the first three-position four-way electromagnetic directional valve simultaneously
Hydraulic fluid port；Hydraulic motor is connected by hydraulic control locking system with decelerator；The oil-feed of the oil inlet of first check valve, the second check valve
The oil-out of mouth, the oil-out of the first overflow valve and the second overflow valve connects together and is connected to the oil-feed with filter simultaneously
Mouthful, the oil-out of filter is connected to fuel tank.
According to such scheme, the vehicle lowering or hoisting gear includes first hydraulic cylinder group, second hydraulic cylinder group and 2/2-way
Solenoid directional control valve；First hydraulic cylinder group includes first hydraulic cylinder, second hydraulic cylinder, the first accumulator, the second 3-position 4-way electromagnetism
Reversal valve and first throttle valve；Second hydraulic cylinder group include the 3rd hydraulic cylinder, the 4th hydraulic cylinder, the second accumulator, the three or three
Four-way electromagnetic reversing valve and second throttle；The oil-out of hydraulic pump is connected to the of the second three-position four-way electromagnetic directional valve simultaneously
Second hydraulic fluid port of one hydraulic fluid port and the 3rd three-position four-way electromagnetic directional valve；3rd hydraulic fluid port of the second three-position four-way electromagnetic directional valve is simultaneously
It is connected to the oil inlet and 2/2-way of the first hydraulic fluid port of first hydraulic cylinder, the first hydraulic fluid port of second hydraulic cylinder, the first accumulator
The oil inlet of solenoid directional control valve, the second hydraulic fluid port of first hydraulic cylinder are connected together and connected with the second hydraulic fluid port of second hydraulic cylinder
To the 4th hydraulic fluid port of the second three-position four-way electromagnetic directional valve, the second hydraulic fluid port of the second three-position four-way electromagnetic directional valve is connected to
The oil inlet of one choke valve；4th hydraulic fluid port of the 3rd three-position four-way electromagnetic directional valve is connected to the first oil of the 3rd hydraulic cylinder simultaneously
The oil-out of mouth, the first hydraulic fluid port of the 4th hydraulic cylinder, the oil inlet of the second accumulator and 2/2-way solenoid directional control valve, the 3rd liquid
Second hydraulic fluid port of cylinder pressure and the second hydraulic fluid port of the 4th hydraulic cylinder connect together and are connected to the 3rd three-position four-way electromagnetic directional valve
The 3rd hydraulic fluid port, the first hydraulic fluid port of the 3rd three-position four-way electromagnetic directional valve is connected to the oil inlet of second throttle；Second throttling
The oil-out of valve connects together with the oil-out of first throttle valve and is connected to the oil inlet of filter, the oil-out of filter
It is connected to fuel tank.
As the further scheme of such scheme, the vehicle lifting hydraulic cylinder include first hydraulic cylinder, second hydraulic cylinder,
3rd hydraulic cylinder and with the 4th hydraulic cylinder.
According to such scheme, the track steel wheel draw off gear includes the 3rd hydraulic cylinder group, the 4th hydraulic cylinder group and the 3rd
Choke valve；3rd hydraulic cylinder group includes the 5th hydraulic cylinder, the 6th hydraulic cylinder, accumulator and the 4th three-position four-way electromagnetic directional valve,
4th hydraulic cylinder group includes the 7th hydraulic cylinder, the 8th hydraulic cylinder, the 4th accumulator and the 5th three-position four-way electromagnetic directional valve；Hydraulic pressure
The oil-out of pump is connected to the first hydraulic fluid port and the 5th three-position four-way electromagnetic directional valve of the 4th three-position four-way electromagnetic directional valve simultaneously
The 3rd hydraulic fluid port；3rd hydraulic fluid port of the 4th three-position four-way electromagnetic directional valve is connected to the first hydraulic fluid port of the 5th hydraulic cylinder, the simultaneously
First hydraulic fluid port of six hydraulic cylinders and the oil inlet of the 3rd accumulator, the second hydraulic fluid port of the 5th hydraulic cylinder and the second of the 6th hydraulic cylinder
Hydraulic fluid port connects together and is connected to the 4th hydraulic fluid port of the 4th three-position four-way electromagnetic directional valve；5th three-position four-way electromagnetic directional valve
The first hydraulic fluid port be connected to the first hydraulic fluid port, the 8th first hydraulic fluid port of hydraulic cylinder and entering for the 4th accumulator of the 7th hydraulic cylinder simultaneously
Hydraulic fluid port, the second hydraulic fluid port of the 7th hydraulic cylinder and the second hydraulic fluid port of the 8th hydraulic cylinder connect together and are connected to the 5th 3-position 4-way
Second hydraulic fluid port of solenoid directional control valve；The 4th hydraulic fluid port and the 4th three-position four-way electromagnetic directional valve of 5th three-position four-way electromagnetic directional valve
The second hydraulic fluid port connect together and be connected to the oil inlet of the 3rd choke valve, the oil-out of the 3rd choke valve is connected to fuel tank.
As the further scheme of such scheme, the track steel wheel folding and unfolding hydraulic cylinder refers to the 5th hydraulic cylinder or the 6th liquid
Cylinder pressure or the 7th hydraulic cylinder or the 8th hydraulic cylinder.
Compared with prior art, the beneficial effects of the invention are as follows：The row of itself can be relied in the case where not damaging rail
The action that upper rail is completed in switching mechanism is walked, then from highway pattern switching to railroad mode, and need not be by special usual friendship
Road junction, or artificially separately lay railway ballast.Adding the walking mechanism of ordinary excavator after the walking switching mechanism can be changed,
It can be widely applied to rail track repairing, new line erection, the construction of railway both sides cable ditch etc. along railway operation and make after conversion
Industry.
Brief description of the drawings
Fig. 1 is the connection relationship diagram of hydraulic system in the present invention；
Fig. 2 is the structural representation of mechanical structure in the present invention；
Fig. 3 is that section view when preceding walking switching mechanism and rear walking switching mechanism are connected with chassis of dredging machine in the present invention is shown
It is intended to；
Fig. 4 is the structural representation of preceding walking switching mechanism in the present invention；
Fig. 5 is that sectional structure when vehicle slewing equipment and vehicle lowering or hoisting gear are connected with chassis of dredging machine in the present invention shows
It is intended to；
Fig. 6 is the overlooking the structure diagram of vehicle slewing equipment and vehicle lowering or hoisting gear in the present invention.
Embodiment
The embodiment of the present invention is described further below in conjunction with the accompanying drawings, each label is interpreted as in figure：1-
Vehicle slewing equipment, 2- decelerators, 3- hydraulic motors, 4- hydraulic control locking systems, the check valves of 5- first, the check valves of 6- second, 7-
First overflow valve, the overflow valves of 8- second, the three-position four-way electromagnetic directional valves of 9- first, 10- fuel tanks, 11- filters, 12- vehicle liters
Falling unit, 13- first hydraulic cylinder groups, 14- second hydraulic cylinder groups, 15- first hydraulic cylinders, 16- second hydraulic cylinders, the liquid of 17- the 3rd
Cylinder pressure, the hydraulic cylinders of 18- the 4th, the accumulators of 19- first, the accumulators of 20- second, the three-position four-way electromagnetic directional valves of 21- second, 22-
3rd three-position four-way electromagnetic directional valve, 23- first throttle valves, 24- second throttle, 25- 2/2-way solenoid directional control valves, 26-
Track steel wheel draw off gear, the hydraulic cylinder groups of 27- the 3rd, the hydraulic cylinders of 28- the 5th, the hydraulic cylinders of 29- the 6th, the accumulators of 30- the 3rd,
The three-position four-way electromagnetic directional valves of 31- the 4th, the choke valves of 32- the 3rd, the three-position four-way electromagnetic directional valves of 33- the 5th, the accumulation of energys of 34- the 4th
Device, the hydraulic cylinder groups of 35- the 4th, the hydraulic cylinders of 36- the 7th, the hydraulic cylinders of 37- the 8th, the overflow valves of 38- the 3rd, 39- hydraulic pumps, 40- electricity
Machine；
41- chassis of dredging machine, 42- track steel wheels, 43- wheel shafts, the bearing pins of 44- first, the bearing pins of 45- second, 46- bolts, 47-
First connector, the connectors of 48- second, 49- connecting rods, 50- track steel wheel folding and unfolding hydraulic cylinders, 51- vehicle lifting hydraulic cylinders,
52- knuckle-tooth wheel discs, the square chassis of 53-, the connectors of 54- the 3rd, the bearing pins of 55- the 3rd.
A kind of hydraulic system of combined hydraulic crawler excavator walking switching mechanism, including vehicle slewing equipment 1, vehicle liter
Falling unit 12, track steel wheel draw off gear 26, fuel tank 10, filter 11, hydraulic pump 39, the overflow valve 38 of motor 40 and the 3rd.
Motor 40 is connected with hydraulic pump 39；The oil inlet of filter 11 is connected to fuel tank 10, and the oil-out of filter 11 connects
Be connected to the oil inlet of hydraulic pump 39, the oil-out of hydraulic pump 39 be connected to simultaneously the oil inlet of the 3rd overflow valve 38, the one or three
First hydraulic fluid port of four-way electromagnetic reversing valve 9, the first hydraulic fluid port of the second three-position four-way electromagnetic directional valve 21, the 3rd 3-position 4-way electromagnetism
Second hydraulic fluid port of reversal valve 22, the first hydraulic fluid port and the 5th three-position four-way electromagnetic directional valve of the 4th three-position four-way electromagnetic directional valve 31
33 the 3rd hydraulic fluid port, the oil-out of the 3rd overflow valve 38 are connected to fuel tank 10.
It is unidirectional that vehicle slewing equipment 1 includes decelerator 2, hydraulic motor 3, hydraulic control locking system 4, the first check valve 5, second
Valve 6, the first overflow valve 7, the second overflow valve 8, the first three-position four-way electromagnetic directional valve 9, fuel tank 10 and filter 11.One or three
3rd hydraulic fluid port of four-way electromagnetic reversing valve 9 be connected to simultaneously the oil inlet of the first overflow valve 7, the oil-out of the first check valve 5 and
The oil inlet of hydraulic motor 3, the oil-out of hydraulic motor 3 are connected to oil-out, the second overflow valve 8 of the second check valve 6 simultaneously
Oil inlet and the first three-position four-way electromagnetic directional valve 9 the 4th hydraulic fluid port；Hydraulic motor 3 is by hydraulic control locking system 4 with slowing down
Device 2 connects；The oil inlet of first check valve 5, the oil inlet of the second check valve 6, the oil-out of the first overflow valve 7 and the second overflow
The oil-out of valve 8 connects together and is connected to the oil inlet with filter 11 simultaneously, and the oil-out of filter 11 is connected to oil
Case 10.
Vehicle lowering or hoisting gear 12 include first hydraulic cylinder group 13, second hydraulic cylinder group 14,2/2-way solenoid directional control valve 25,
Fuel tank 10 and filter 11.First hydraulic cylinder group 13 includes first hydraulic cylinder 15, second hydraulic cylinder 16, the first accumulator 19, the
Two three-position four-way electromagnetic directional valves 21 and first throttle valve 23；Second hydraulic cylinder group 14 includes the 3rd hydraulic cylinder 17, the 4th hydraulic pressure
Cylinder 18, the second accumulator 20, the 3rd three-position four-way electromagnetic directional valve 22 and second throttle 24.Second 3-position 4-way electromagnetic switch
3rd hydraulic fluid port of valve 21 is connected to the first hydraulic fluid port of first hydraulic cylinder 15, the first hydraulic fluid port of second hydraulic cylinder 16, the first storage simultaneously
The energy oil inlet of device 19 and the oil inlet of 2/2-way solenoid directional control valve 25, the second hydraulic fluid port and the second hydraulic pressure of first hydraulic cylinder 15
Second hydraulic fluid port of cylinder 16 connects together and is connected to the 4th hydraulic fluid port of the second three-position four-way electromagnetic directional valve 21, the two or three
Second hydraulic fluid port of four-way electromagnetic reversing valve 21 is connected to the oil inlet of first throttle valve 23.3rd three-position four-way electromagnetic directional valve 22
The 4th hydraulic fluid port be connected to the first hydraulic fluid port, the first hydraulic fluid port, the second accumulator of the 4th hydraulic cylinder 18 of the 3rd hydraulic cylinder 17 simultaneously
20 oil inlet and the oil-out of 2/2-way solenoid directional control valve 25, the second hydraulic fluid port and the 4th hydraulic cylinder 18 of the 3rd hydraulic cylinder 17
The second hydraulic fluid port connect together and be connected to the 3rd hydraulic fluid port of the 3rd three-position four-way electromagnetic directional valve 22, the 3rd 3-position 4-way electricity
First hydraulic fluid port of magnetic reversal valve 22 is connected to the oil inlet of second throttle 24；The oil-out and first throttle of second throttle 24
The oil-out of valve 23 connects together and is connected to the oil inlet of filter 11, and the oil-out of filter 11 is connected to fuel tank 10.
Track steel wheel draw off gear 26 includes the 3rd hydraulic cylinder group 27, the 4th hydraulic cylinder group 35, the 3rd choke valve 32 and oil
Case 10.3rd hydraulic cylinder group 27 includes the 5th hydraulic cylinder 28, the 6th hydraulic cylinder 29, the 3-position 4-way electromagnetism of accumulator 30 and the 4th and changed
To valve 31；4th hydraulic cylinder group 35 includes the 7th hydraulic cylinder 36, the 8th hydraulic cylinder 37, the 4th accumulator 34 and the 5th 3-position 4-way
Solenoid directional control valve 33.3rd hydraulic fluid port of the 4th three-position four-way electromagnetic directional valve 31 is connected to the first oil of the 5th hydraulic cylinder 28 simultaneously
The oil inlet of mouth, the first hydraulic fluid port of the 6th hydraulic cylinder 29 and the 3rd accumulator 30, the second hydraulic fluid port and the 6th of the 5th hydraulic cylinder 28
Second hydraulic fluid port of hydraulic cylinder 29 connects together and is connected to the 4th hydraulic fluid port of the 4th three-position four-way electromagnetic directional valve 31.Five or three
First hydraulic fluid port of position four-way electromagnetic reversing valve 33 is connected to the first hydraulic fluid port of the 7th hydraulic cylinder 36, the of the 8th hydraulic cylinder 37 simultaneously
The oil inlet of one hydraulic fluid port and the 4th accumulator 34, the second hydraulic fluid port of the 7th hydraulic cylinder 36 and the second hydraulic fluid port of the 8th hydraulic cylinder 37 connect
It is connected to together and is connected to the second hydraulic fluid port of the 5th three-position four-way electromagnetic directional valve 33；5th three-position four-way electromagnetic directional valve 33
4th hydraulic fluid port and the second hydraulic fluid port of the 4th three-position four-way electromagnetic directional valve 31 connect together and are connected to the 3rd choke valve 32
Oil inlet, the oil-out of the 3rd choke valve 32 are connected to fuel tank 10.
The operation principle of hydraulic system is：
Excavator contacts road surface normally travel on highway with crawler belt；, it is necessary to which walking mechanism is entered near traveling to rail
During row conversion, the locomotive head tuning direction vertical with track is excavated, dipper-arm extend out to distal end rail outside-supporting excavator, together
When angles and positions required when moving forward suitable distance to adjust excavator to upper rail.Then in vehicle lowering or hoisting gear 12
First hydraulic cylinder 15, second hydraulic cylinder 16, the piston rod of the 3rd hydraulic cylinder 17 and the 4th hydraulic cylinder 18 are stretched out until being connect with ground
Touch, now dipper-arm is recoverable is not required to play a supportive role again.The working position of the second three-position four-way electromagnetic directional valve 21 is adjusted, makes to lean on
The piston rod of first hydraulic cylinder 15 and second hydraulic cylinder 16 in the first hydraulic cylinder group 13 of near-car head part withdraws suitable length,
The extension elongation of the piston rod of the 3rd hydraulic cylinder 17 and the 4th hydraulic cylinder 18 in second hydraulic cylinder group 14 is adjusted in the same manner, is made
Excavator vehicle attitude control.The second three-position four-way electromagnetic directional valve 21 and the 3rd 3-position 4-way after leveling in vehicle lowering or hoisting gear 12
Solenoid directional control valve 22 is placed in middle position (middle position uses the O-shaped purpose positioned rapidly to reach), and 2/2-way solenoid directional control valve 25 is led
It is logical so that first hydraulic cylinder 15, second hydraulic cylinder 16, the rodless cavity pressure of the 3rd hydraulic cylinder 17 and the 4th hydraulic cylinder 18 are equal,
First accumulator 19 and the second accumulator 20 are used for pressurize, so as to avoid because the reasons such as fluid leakage have influence on inclination of vehicle
The normal work of vehicle slewing equipment 1, even turns on one's side.First throttle valve 23 and second throttle in vehicle lowering or hoisting gear 12
24 play speed adjustment effect, control the piston in vehicle lowering or hoisting gear 12 to keep slow speed in stretching and retraction.
After the execution of vehicle lowering or hoisting gear 12, the first 3-position-3-way solenoid directional control valve 9 in vehicle slewing equipment 1 is cut
Left position (or right position) is changed to, excavator vehicle is aligned the headstock position of excavator clockwise (or rotating counterclockwise), is made rail
Road steel wheel 42 can be bonded after putting down with rail upper surface.The first check valve 5 and the second check valve 6 in vehicle slewing equipment 1 rise
Repairing acts on, and when the oil inlet fluid of hydraulic motor 3 supplies deficiency, when forming of short duration vacuum, fluid in fuel tank 10 is by the
One check valve 5 or the second check valve 6 give the repairing of hydraulic motor 3.First overflow valve 7 and the second overflow valve 8 play anti-reverse, if
Without the first overflow valve 7 and the second overflow valve 8, when the first 3-position-3-way solenoid directional control valve 9 is switched to middle position, hydraulic pump 39 is no longer given
During 3 fuel feeding of hydraulic motor, hydraulic motor blade can still be rotated by original direction due to inertia, be caused inlet pressure to be less than
Oil-out, so that hydraulic motor 3 reverses.The first overflow valve 7 and the second overflow valve 8 herein can make the first 3-position-3-way electromagnetism
Reversal valve 9 is switched to after middle position, and the oil inlet of hydraulic motor 3 is rapidly achieved consistent with the pressure of oil-out, realizes anti-reverse
Function, in order to avoid stopping rocking back and forth to the rear of the fuel feeding of hydraulic motor 3, cause unstable and larger contraposition deviation.Vehicle
Slewing equipment 1 is designed with hydraulic control locking system 4, and the hydraulic control locking system 4 when to 3 fuel feeding of hydraulic motor of hydraulic pump 39 unclamps, liquid
Pressure motor 3 is rotatable, and the locking of hydraulic control locking system 4, hydraulic motor 3 can not rotate during fuel cut-off, prevent hydraulic motor 3 in car
Turned round under the influence of the applied external force such as body self gravitation or wind-force, to ensure the security of work.
After the execution of vehicle slewing equipment 1, the 4th 3-position 4-way electromagnetic switch in track steel wheel draw off gear 26
The three-position four-way electromagnetic directional valve 33 of valve 31 and the 5th is switched to left position, the 5th hydraulic cylinder 28, the 6th hydraulic cylinder 29, the 7th hydraulic cylinder
36 and the 8th the piston rod of hydraulic cylinder 37 stretch out, track steel wheel 42 is put down and is bonded with rail head of rail upper surface, then the 4th 3
The position three-position four-way electromagnetic directional valve 33 of four-way electromagnetic reversing valve 31 and the 5th switches back into middle position, is stored by the 3rd accumulator the 30, the 4th
The energy pressurize of device 34, makes the holding position of track steel wheel 42.Wherein the rodless cavity of the 5th hydraulic cylinder 28 and the 6th hydraulic cylinder 29 without bar
Chamber connects, and rod chamber connects with rod chamber；The rodless cavity of 7th hydraulic cylinder 36 connects with the rodless cavity of the 8th hydraulic cylinder 37, there is bar
Chamber connects with rod chamber, so as to so that two hydraulic cylinders in same hydraulic cylinder group can keep synchronization telescope；3rd accumulator
30 and during the 4th 34 pressurize of accumulator, the rodless cavity pressure of the 5th hydraulic cylinder 28 and the 6th hydraulic cylinder 29 is equal, the 7th hydraulic cylinder
36 and the 8th hydraulic cylinder 37 rodless cavity pressure it is equal.
Track steel wheel 42 puts down and after locking, the second three-position four-way electromagnetic directional valve in regulation vehicle lowering or hoisting gear 12
21 and the 3rd three-position four-way electromagnetic directional valve 22 by first hydraulic cylinder 15, second hydraulic cylinder 16, the 3rd hydraulic cylinder 17 and the 4th liquid
The piston rod of cylinder pressure 18 is retracted.
Motor 40 drives hydraulic pump 39 to rotate during work, and fluid is exported from fuel tank 10 via being sucked after filter 11
To each device, overflow valve 38 is used as safety valve.When vehicle lowering or hoisting gear 12 or track steel wheel draw off gear 26 work, motor 40
Hydraulic pump 39 is driven to be turned round compared with the slow-speed of revolution；When vehicle slewing equipment 1 works, motor 40 drives hydraulic pump 39 to be returned with higher rotation speed
Turn.
A kind of mechanical structure of combined hydraulic crawler excavator walking switching mechanism, including under chassis of dredging machine 41
Side front side preceding walking switching mechanism and below chassis of dredging machine 41 rear side rear walking switching mechanism, preceding walking switching mechanism
It is identical and be symmetrical arranged with the structure of rear walking switching mechanism.
The wheel shaft 43 of the inner side of the left rail steel wheel 42 of preceding walking switching mechanism is provided with a Collapsible support device；Institute
Stating Collapsible support device includes the first connector 47 and the second connector 48, after the first connector 47 and the second connector 48 coordinate
It is connected on the wheel shaft 43 of the inner side of left rail steel wheel 42, the top of the second connector 48 is fixed with the bottom of connecting rod 49 to be connected
Connect, the top of connecting rod 49 is be hinged with the 3rd connector 54, and the 3rd connector 54 is fixedly connected with chassis of dredging machine 41；Also wrap
The track steel wheel folding and unfolding hydraulic cylinder 50 being inclined to set is included, the cylinder bucket at the top of it is be hinged with chassis of dredging machine 41, the work of its bottom
Stopper rod is hinged to the side of connecting rod 49.
The wheel shaft 43 of the inner side of the right rail steel wheel 42 of preceding walking switching mechanism is provided with folds branch with left side identical
Support arrangement.
Track steel wheel folding and unfolding hydraulic cylinder 50 refers to the 5th hydraulic cylinder 28 or the 6th hydraulic cylinder 29 or the 7th hydraulic cylinder 36 or the
Eight hydraulic cylinders 37.
The upper end of vehicle lifting hydraulic cylinder 51 is connected with chassis of dredging machine 41, and lower end is connected with knuckle-tooth wheel disc 52, Knucle-gear
Disk 52 coordinates with square chassis 53 below, supporting plate of the square chassis 53 as vehicle.Pass through flange on square chassis 53
Disk is provided with hydraulic motor 3 and decelerator 2, and the ring gear of decelerator 2 engages with the external toothing of knuckle-tooth wheel disc 52, is dug so as to drive
Pick machine vehicle rotates clockwise or counterclockwise.Vehicle lifting hydraulic cylinder 51 includes first hydraulic cylinder 15, second hydraulic cylinder the 16, the 3rd
Hydraulic cylinder 17 and with the 4th hydraulic cylinder 18, first hydraulic cylinder 15, second hydraulic cylinder 16, the 3rd hydraulic cylinder 17 and the 4th hydraulic cylinder
18 are evenly distributed on knuckle-tooth wheel disc 52.
The operation principle of mechanical structure is：Combined hydraulic crawler excavator is needed from highway pattern switching to railroad mode
When, by the scraper bowl of excavator itself, headstock is lifted, will be square by vehicle lowering or hoisting gear 12 after being adjusted to correct position
Chassis 53 is put between two rails, adjusts body gesture by vehicle lowering or hoisting gear 12, hydraulic pump 39 is no longer after being adjusted to level
To the first hydraulic cylinder 15 in vehicle lowering or hoisting gear 12, second hydraulic cylinder 16, the 3rd hydraulic cylinder 17 and the fuel feeding of the 4th hydraulic cylinder 18,
Each hydraulic cylinder in vehicle lowering or hoisting gear 12 is by the first accumulator 19 and the pressurize of the second accumulator 20.Then vehicle slewing equipment 1
Work, hydraulic pump 39 give the fuel feeding of hydraulic motor 3 being arranged in square chassis 53, and hydraulic motor 3 drives knuckle-tooth wheel disc 52 to turn round,
Knuckle-tooth wheel disc 52 drives the vehicle lifting hydraulic cylinder 51 being mounted above and vehicle revolution.
The mechanical structure of track steel wheel draw off gear 26 is by track steel wheel 42, wheel shaft 43, the first bearing pin 44, the second bearing pin
45th, bolt 46, the first connector 47, the second connector 48, connecting rod 49, the 3rd connector 54, the 3rd bearing pin 55 and track
Steel wheel folding and unfolding hydraulic cylinder 50 forms.
After vehicle slewing equipment 1 turns round headstock to positive rail, hydraulic pump 39 is given in track steel wheel draw off gear 26
5th hydraulic cylinder 28, the 6th hydraulic cylinder 29, the 7th hydraulic cylinder 36 and the fuel feeding of the 8th hydraulic cylinder 37, each hydraulic cylinder piston rod stretch out,
Drive connection rod member 49 around be connected with chassis of dredging machine 41 pin joint revolution, wheel shaft 43 is put down, make track steel wheel 42 with
Rail surface is bonded.Then, each hydraulic cylinder piston rod in vehicle lowering or hoisting gear 12 is retracted, driving track steel wheel 42 makes combined
Hydraulic crawler excavator advances.
Claims (6)
- A kind of 1. combined hydraulic crawler excavator walking switching mechanism, it is characterised in that：Including mechanical structure and hydraulic system；The mechanical structure includes being arranged on the preceding walking switching mechanism of chassis of dredging machine (41) lower section front side and installed in excavation The rear walking switching mechanism of rear side below machine chassis (41)；Walking switching mechanism includes a wheel shaft (43), wheel shaft before described (43) left end and right-hand member is connected to a track steel wheel (42)；The wheel shaft (43) on the inside of track steel wheel (42) before described on the left of walking switching mechanism is provided with a Collapsible support device； The Collapsible support device includes the first connector (47) and the second connector (48), the first connector (47) and the second connector (48) it is connected to after coordinating on the wheel shaft (43) on the inside of left rail steel wheel (42), the top of the second connector (48) and connecting rod The bottom of part (49) is fixedly connected, and the top of connecting rod (49) and the 3rd connector (54) are be hinged, the 3rd connector (54) with Chassis of dredging machine (41) is fixedly connected；Also include the track steel wheel folding and unfolding hydraulic cylinder (50) being inclined to set, the cylinder bucket at the top of it Be hinged with chassis of dredging machine (41), the piston rod of its bottom is hinged to the side of connecting rod (49)；The wheel shaft (43) on the inside of track steel wheel (42) before described on the right side of walking switching mechanism is provided with to be folded with left side identical Support meanss；Walking switching mechanism is identical with the structure of the preceding walking switching mechanism after described and is symmetrical arranged；Also include vehicle lifting hydraulic cylinder (51), its upper end is fixedly connected with chassis of dredging machine (41), and lower end is connected to Knucle-gear Disk (52), knuckle-tooth wheel disc (52) coordinate with square chassis (53) below；It is provided with square chassis (53) by ring flange Hydraulic motor (3) and decelerator (2), the ring gear of decelerator (2) engage with the external toothing of knuckle-tooth wheel disc (52), are dug so as to drive Pick machine vehicle rotates clockwise or counterclockwise；The hydraulic system includes fuel tank (10), hydraulic pump (39), vehicle slewing equipment (1), vehicle lowering or hoisting gear (12) and rail Road steel wheel draw off gear (26)；Hydraulic pump (39) is connected with motor (40), and the oil inlet of filter (11) is connected to fuel tank (10), The oil-out of filter (11) is connected to the oil inlet of hydraulic pump (39), and the oil-out of hydraulic pump (39) is connected to vehicle and returned simultaneously Rotary device (1), vehicle lowering or hoisting gear (12), the oil inlet (6) of track steel wheel draw off gear (2) and the 3rd overflow valve (38), The oil-out of three overflow valves (38) is connected to fuel tank (10).
- A kind of 2. combined hydraulic crawler excavator walking switching mechanism according to claim 1, it is characterised in that：It is described whole Car slewing equipment (1) includes decelerator (2), hydraulic motor (3), hydraulic control locking system (4), the first check valve (5), second unidirectional Valve (6), the first overflow valve (7), the second overflow valve (8) and the first three-position four-way electromagnetic directional valve (9)；Hydraulic pump (39) it is fuel-displaced Mouth is connected to the first hydraulic fluid port of the first three-position four-way electromagnetic directional valve (9), the 3rd oil of the first three-position four-way electromagnetic directional valve (9) Mouth is connected to the oil inlet of the oil inlet of the first overflow valve (7), the oil-out of the first check valve (5) and hydraulic motor (3) simultaneously； The oil-out of hydraulic motor (3) is connected to the oil-out of the second check valve (6), the oil inlet of the second overflow valve (8) and the simultaneously 4th hydraulic fluid port of one three-position four-way electromagnetic directional valve (9)；Hydraulic motor (3) is connected by hydraulic control locking system (4) and decelerator (2) Connect；The oil inlet of first check valve (5), the oil inlet of the second check valve (6), the oil-out of the first overflow valve (7) and second are overflow The oil-out of stream valve (8) connects together and is connected to the oil inlet with filter (11) simultaneously, the oil-out of filter (11) It is connected to fuel tank (10).
- A kind of 3. combined hydraulic crawler excavator walking switching mechanism according to claim 1, it is characterised in that：It is described whole Car lowering or hoisting gear (12) includes first hydraulic cylinder group (13), second hydraulic cylinder group (14) and 2/2-way solenoid directional control valve (25)； First hydraulic cylinder group (13) includes first hydraulic cylinder (15), second hydraulic cylinder (16), the first accumulator (19), the second 3-position 4-way Solenoid directional control valve (21) and first throttle valve (23)；Second hydraulic cylinder group (14) includes the 3rd hydraulic cylinder (17), the 4th hydraulic cylinder (18), the second accumulator (20), the 3rd three-position four-way electromagnetic directional valve (22) and second throttle (24)；Hydraulic pump (39) go out Hydraulic fluid port is connected to the first hydraulic fluid port and the 3rd three-position four-way electromagnetic directional valve of the second three-position four-way electromagnetic directional valve (21) simultaneously (22) the second hydraulic fluid port；3rd hydraulic fluid port of the second three-position four-way electromagnetic directional valve (21) is connected to first hydraulic cylinder (15) simultaneously First hydraulic fluid port, the first hydraulic fluid port of second hydraulic cylinder (16), the oil inlet and 2/2-way solenoid directional control valve of the first accumulator (19) (25) oil inlet, the second hydraulic fluid port of first hydraulic cylinder (15) are connected together and connected with the second hydraulic fluid port of second hydraulic cylinder (16) It is connected to the 4th hydraulic fluid port of the second three-position four-way electromagnetic directional valve (21), the second oil of the second three-position four-way electromagnetic directional valve (21) Mouth is connected to the oil inlet of first throttle valve (23)；4th hydraulic fluid port of the 3rd three-position four-way electromagnetic directional valve (22) is connected to simultaneously First hydraulic fluid port of the 3rd hydraulic cylinder (17), the first hydraulic fluid port, the oil inlet and two of the second accumulator (20) of the 4th hydraulic cylinder (18) The oil-out of two electric change valves of position (25), the second hydraulic fluid port of the 3rd hydraulic cylinder (17) and the second oil of the 4th hydraulic cylinder (18) Mouth connects together and is connected to the 3rd hydraulic fluid port of the 3rd three-position four-way electromagnetic directional valve (22), the 3rd 3-position 4-way electromagnetic switch First hydraulic fluid port of valve (22) is connected to the oil inlet of second throttle (24)；The oil-out and first throttle of second throttle (24) The oil-out of valve (23) connects together and is connected to the oil inlet of filter (11), and the oil-out of filter (11) is connected to oil Case (10).
- A kind of 4. combined hydraulic crawler excavator walking switching mechanism according to claim 2, it is characterised in that：It is described whole Car lifting hydraulic cylinder (51) include first hydraulic cylinder (15), second hydraulic cylinder (16), the 3rd hydraulic cylinder (17) and with the 4th hydraulic pressure Cylinder (18).
- A kind of 5. combined hydraulic crawler excavator walking switching mechanism according to claim 1, it is characterised in that：The rail Road steel wheel draw off gear (26) includes the 3rd hydraulic cylinder group (27), the 4th hydraulic cylinder group (35) and the 3rd choke valve (32)；3rd Hydraulic cylinder group (27) is changed including the 5th hydraulic cylinder (28), the 6th hydraulic cylinder (29), accumulator (30) and the 4th 3-position 4-way electromagnetism To valve (31), the 4th hydraulic cylinder group (35) includes the 7th hydraulic cylinder (36), the 8th hydraulic cylinder (37), the 4th accumulator (34) and the Five three-position four-way electromagnetic directional valves (33)；The oil-out of hydraulic pump (39) is connected to the 4th three-position four-way electromagnetic directional valve simultaneously (31) the first hydraulic fluid port and the 3rd hydraulic fluid port of the 5th three-position four-way electromagnetic directional valve (33)；4th three-position four-way electromagnetic directional valve (31) the 3rd hydraulic fluid port is connected to the first hydraulic fluid port of the 5th hydraulic cylinder (28), the first hydraulic fluid port of the 6th hydraulic cylinder (29) and the simultaneously The oil inlet of three accumulators (30), the second hydraulic fluid port of the 5th hydraulic cylinder (28) and the second hydraulic fluid port of the 6th hydraulic cylinder (29) are connected to Together and it is connected to the 4th hydraulic fluid port of the 4th three-position four-way electromagnetic directional valve (31)；5th three-position four-way electromagnetic directional valve (33) First hydraulic fluid port is connected to the first hydraulic fluid port of the 7th hydraulic cylinder (36), the first hydraulic fluid port of the 8th hydraulic cylinder (37) and the 4th accumulation of energy simultaneously The oil inlet of device (34), the second hydraulic fluid port of the 7th hydraulic cylinder (36) and the second hydraulic fluid port of the 8th hydraulic cylinder (37) connect together simultaneously It is connected to the second hydraulic fluid port of the 5th three-position four-way electromagnetic directional valve (33)；4th oil of the 5th three-position four-way electromagnetic directional valve (33) Mouth connects together with the second hydraulic fluid port of the 4th three-position four-way electromagnetic directional valve (31) and is connected to entering for the 3rd choke valve (32) Hydraulic fluid port, the oil-out of the 3rd choke valve (32) are connected to fuel tank (10).
- A kind of 6. combined hydraulic crawler excavator walking switching mechanism according to claim 5, it is characterised in that：The rail Road steel wheel folding and unfolding hydraulic cylinder (50) refers to the 5th hydraulic cylinder (28) or the 6th hydraulic cylinder (29) or the 7th hydraulic cylinder (36) or the 8th Hydraulic cylinder (37).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710654515.7A CN107618324B (en) | 2017-08-03 | 2017-08-03 | Walking conversion mechanism of highway-railway dual-purpose hydraulic excavator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710654515.7A CN107618324B (en) | 2017-08-03 | 2017-08-03 | Walking conversion mechanism of highway-railway dual-purpose hydraulic excavator |
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| CN107618324A true CN107618324A (en) | 2018-01-23 |
| CN107618324B CN107618324B (en) | 2020-01-14 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108482031A (en) * | 2018-02-06 | 2018-09-04 | 中车工业研究院有限公司 | A kind of railway intelligent multifunctional traveling platform |
| CN108528157A (en) * | 2018-06-21 | 2018-09-14 | 中车眉山车辆有限公司 | Lower rail device on a kind of road rail vehicle transverse shifting |
| CN112339781A (en) * | 2020-11-13 | 2021-02-09 | 合肥工业大学 | Lifting wheel device for assisting starting and climbing of locomotive |
| CN112942479A (en) * | 2021-01-28 | 2021-06-11 | 三一重机有限公司 | Highway-railway dual-purpose excavator walking driving system and highway-railway dual-purpose excavator |
| CN113477916A (en) * | 2021-07-08 | 2021-10-08 | 上海宝冶冶金工程有限公司 | Ladle transport vehicle |
| CN115822028A (en) * | 2022-12-29 | 2023-03-21 | 徐州徐工挖掘机械有限公司 | Walking hydraulic system of highway-railway dual-purpose excavator and control method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108482031A (en) * | 2018-02-06 | 2018-09-04 | 中车工业研究院有限公司 | A kind of railway intelligent multifunctional traveling platform |
| WO2019154002A1 (en) * | 2018-02-06 | 2019-08-15 | 中车工业研究院有限公司 | Railway intelligent multifunctional travel platform |
| CN108482031B (en) * | 2018-02-06 | 2019-08-27 | 中车工业研究院有限公司 | A kind of railway intelligent multifunctional traveling platform |
| CN108528157A (en) * | 2018-06-21 | 2018-09-14 | 中车眉山车辆有限公司 | Lower rail device on a kind of road rail vehicle transverse shifting |
| CN108528157B (en) * | 2018-06-21 | 2023-07-11 | 中车眉山车辆有限公司 | Rail device about highway and railway dual-purpose car lateral shifting |
| CN112339781A (en) * | 2020-11-13 | 2021-02-09 | 合肥工业大学 | Lifting wheel device for assisting starting and climbing of locomotive |
| CN112942479A (en) * | 2021-01-28 | 2021-06-11 | 三一重机有限公司 | Highway-railway dual-purpose excavator walking driving system and highway-railway dual-purpose excavator |
| CN112942479B (en) * | 2021-01-28 | 2022-07-19 | 三一重机有限公司 | Highway-railway dual-purpose excavator walking driving system and highway-railway dual-purpose excavator |
| CN113477916A (en) * | 2021-07-08 | 2021-10-08 | 上海宝冶冶金工程有限公司 | Ladle transport vehicle |
| CN115822028A (en) * | 2022-12-29 | 2023-03-21 | 徐州徐工挖掘机械有限公司 | Walking hydraulic system of highway-railway dual-purpose excavator and control method |
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| CN107618324B (en) | 2020-01-14 |
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