CN110168174A - The control method of working truck and working truck - Google Patents
The control method of working truck and working truck Download PDFInfo
- Publication number
- CN110168174A CN110168174A CN201880006328.0A CN201880006328A CN110168174A CN 110168174 A CN110168174 A CN 110168174A CN 201880006328 A CN201880006328 A CN 201880006328A CN 110168174 A CN110168174 A CN 110168174A
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- China
- Prior art keywords
- switching valve
- accumulator
- working truck
- equipment
- working
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
- E02F3/80—Component parts
- E02F3/84—Drives or control devices therefor, e.g. hydraulic drive systems
- E02F3/844—Drives or control devices therefor, e.g. hydraulic drive systems for positioning the blade, e.g. hydraulically
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
- E02F3/80—Component parts
- E02F3/815—Blades; Levelling or scarifying tools
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2217—Hydraulic or pneumatic drives with energy recovery arrangements, e.g. using accumulators, flywheels
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2221—Control of flow rate; Load sensing arrangements
- E02F9/2225—Control of flow rate; Load sensing arrangements using pressure-compensating valves
- E02F9/2228—Control of flow rate; Load sensing arrangements using pressure-compensating valves including an electronic controller
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2267—Valves or distributors
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2278—Hydraulic circuits
- E02F9/2285—Pilot-operated systems
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
- E02F3/7636—Graders with the scraper blade mounted under the tractor chassis
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Operation Control Of Excavators (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
First switching valve (71a) is connect with the lid side loop of lift cylinder (44).Second switching valve (71b) is connect with the head side loop of lift cylinder (44).First accumulator (72a) is connect via the first switching valve (71a) with the lid side loop of lift cylinder (44).Second accumulator (72b) is connect via the second switching valve (71b) with the head side loop of lift cylinder (44).Third switching valve (71c) is connected between the first accumulator (72a) and the second accumulator (72b).
Description
Technical field
The present invention relates to the control methods of working truck and working truck.
Background technique
Motor-driven grader makes chassis not have suspension function, to ensure leveling operation, road surface cutting operation, digging operation etc.
Transaction capabilities.In addition, the tire of motor-driven grader is hollow.Therefore, tire becomes spring system, attached in specific speed
Closely, vehicle body generates vibration.In the case where vehicle body produces vibration, in motion in order to avoid vibration, need to reduce speed.
Such as the technology for inhibiting the vibration is disclosed in Japanese Patent Publication 2-132754 bulletin.Above-mentioned bulletin it is motor-driven
Blade machine includes the perching knife lift cylinder connecting with equipment；The switching valve being connect with the lid side of perching knife lift cylinder；It is mentioned with perching knife
Rise the switching valve of the head side connection of cylinder；And the accumulator being connect with above-mentioned two switching valve.
In above-mentioned bulletin, in the case where the head side hydraulic circuit of perching knife lift cylinder is connected to accumulator, motor-driven level road
The body vibrations when driving of machine are inhibited.In addition, in the feelings that are connected to accumulator of lid side hydraulic circuit of perching knife lift cylinder
Under condition, the jack-up impact of the equipment when operation of motor-driven grader is inhibited.
Citation
Patent document
Patent document 1: Japanese Patent Publication 2-132754 bulletin
Summary of the invention
Subject to be solved by the invention
However, compared with the capacity of accumulator needed for the jack-up impact in order to inhibit equipment, sometimes for inhibition
The capacity of accumulator needed for vibration when driving is bigger.In this case, if the capacity of accumulator is made to be suitable for inhibiting
Capacity needed for the jack-up impact of equipment, then accumulator cannot fully absorb vibration when driving.
On the other hand, it if increasing the capacity of accumulator in order to fully absorb vibration when driving, is shoveled in operation
The power on knife (equipment) pressing road surface becomes smaller.Therefore, it cannot get desired road surface cutting power.
Vibration when driving can be adequately suppressed the object of the present invention is to provide one kind and obtains desired work
The working truck of industry ability and the control method of working truck.
Solution for solving the problem
Working truck of the invention have equipment, working cylinder, the first switching valve, the second switching valve, the first accumulator,
Second accumulator and third switching valve.Working cylinder drives equipment.The lid side of first switching valve and working cylinder is returned
Road connection.The connection of the head side loop of second switching valve and working cylinder.First accumulator via the first switching valve and with working cylinder
The connection of lid side loop.Second accumulator is connect via the second switching valve with the head side loop of working cylinder.The connection of third switching valve
Between the first accumulator and the second accumulator.
The control method of working truck of the invention is the control method of above-mentioned working truck, has and proceeds as follows
The process of control: it under the impact absorbing mode of equipment, opens the first switching valve and the second switching valve of closing and third is cut
Valve is changed, and under the vibration suppression mode of working truck, close the first switching valve and opens the second switching valve and third switching
Valve.
Invention effect
According to the present invention, it can be achieved that vibration when driving can be adequately suppressed and obtain desired work capacity
The control method of working truck and working truck.
Detailed description of the invention
Fig. 1 is the perspective view for summarily showing the structure of the motor-driven grader in an embodiment.
Fig. 2 is the side view for summarily showing the structure of the motor-driven grader in an embodiment.
Fig. 3 is the schematic diagram for showing the structure of comparative example 1.
Fig. 4 is the schematic diagram for showing the structure of comparative example 2.
Fig. 5 is the motor-driven level road for showing the example of other used equipments of motor-driven grader in an embodiment
The side view of machine.
Specific embodiment
Hereinafter, being illustrated based on working truck of the attached drawing to embodiments of the present invention.In the following description, for
Identical component marks identical appended drawing reference.Their title and function is also identical.Therefore, it is not repeated to the detailed of them
Explanation.
Firstly, for can using technical idea of the invention working truck an example, that is, motor-driven grader structure into
Row explanation.
Fig. 1 is the perspective view for summarily showing the structure of the motor-driven grader in one embodiment of the present invention.Fig. 2 is general
Strategic point shows the side view of the structure of the motor-driven grader in one embodiment of the present invention.
As shown in Figures 1 and 2, the motor-driven grader 1 in present embodiment mainly has traveling wheel 11,12, body shell
2, driver's cabin 3 and equipment 4.In addition, motor-driven grader 1, which has, is configured at the constituting portion such as the engine of engine room 6
Part.Equipment 4 is for example including perching knife 42.Motor-driven grader 1 can carry out leveling operation using perching knife 42, road surface cutting is made
The operations such as industry, digging operation, snow removing, material mixing.
Traveling wheel 11,12 includes front-wheel 11 and rear-wheel 12.In Fig. 1,2, show by before two of unilateral each wheel
The traveling wheel for a total of six wheel that four rear-wheels 12 of wheel 11 and unilateral each two wheels are constituted, but the quantity of front-wheel 11 and rear-wheel 12
And configuration is not limited to Fig. 1, example shown in 2.
It should be noted that in the explanation of attached drawing below, the direction of the straight trip traveling of motor-driven grader 1 is referred to as motor-driven
The front-rear direction of blade machine 1.On the front-rear direction of motor-driven grader 1, front-wheel 11 will be configured with relative to equipment 4
Side is set as front direction.On the front-rear direction of motor-driven grader 1, the one of rear-wheel 12 will be configured with relative to equipment 4
Side is set as rear direction.The left and right directions of motor-driven grader 1 refers to direction orthogonal with front-rear direction in plan view.Before observation
Right side, the left side of left and right directions when direction are respectively right direction, left direction.The up and down direction of motor-driven grader 1 refer to by
The orthogonal direction of the plane that front-rear direction and left and right directions determine.Side locating for upper ground surface is downside, sky in above-below direction
Locating side is upside.
Body shell 2 extends along the longitudinal direction (left and right directions in Fig. 2).Body shell 2 has the front end 2F of forefront
With the rear end 2R of rearmost part.Body shell 2 includes afterframe 21 and front baffle 22.
Afterframe 21 supports the component parts such as the engine for being configured at engine room 6.Pacify respectively in afterframe 21
Equipped with above-mentioned such as four rear-wheels 12.Four rear-wheels 12 are able to be rotated by the drive force from engine.
Front baffle 22 is installed on the front of afterframe 21.Front baffle 22 rotatably links with afterframe 21.
Front baffle 22 extends along the longitudinal direction.Front baffle 22 has the base end part and opposite with base end part one linked with afterframe 21
The front end of side.The base end part of front baffle 22 connects by the centrepin extended along vertical direction with the front end of afterframe 21
Knot.
Hinged cylinder 23 is installed between front baffle 22 and afterframe 21.Front baffle 22 is set as stretching by hinged cylinder 23
It contracts and can be rotated relative to afterframe 21.
Above-mentioned such as two front-wheels 11 are installed on the front end of front baffle 22 in a manner of it can rotate.Front-wheel 11 passes through
Steering cylinder 7 stretches and can be rotatably attached to front baffle 22 relative to front baffle 22.Motor-driven grader 1 can pass through steering
The flexible of cylinder 7 changes direction of travel.
Front-wheel 11 is not installed on front baffle 22 via suspension.In addition, rear-wheel 12 is not installed on afterframe via suspension
21.Here suspension refers to the component being made of suspension link, spring, damper, and does not include the elastic force of tire.
Counterweight 51 is installed in the front end 2F of body shell 2.Counterweight 51 is mounted to one kind of the attachment of front baffle 22.Match
It weighs 51 and is assemblied in front baffle 22, so that increasing the load directed downwardly that front-wheel 11 is loaded, and increasing while can turn to
Add the press load of perching knife 42.
Driver's cabin 3 is placed in front baffle 22.Steering wheel, gear lever, equipment 4 are internally provided in driver's cabin 3
The operation portions such as operating stick, brake, accelerator pedal, micro pedal (not shown).It should be noted that driver's cabin 3 can also carry
It is placed in afterframe 21.
Equipment 4 for example mainly has draw bar 40 and perching knife 42.Draw bar 40 is configured at the lower section of front baffle 22.Make
The front end of draw bar 40 and the front end of front baffle 22 are linked with ball axle portion.The front end of draw bar 40 is can swing
Mode be installed on the front end of front baffle 22.
The rear end of draw bar 40 is supported on front baffle 22 by lift cylinder 44,45.By the flexible of lift cylinder 44,45,
It the rear end of draw bar 40 can be relative to 22 oscilaltion of front baffle.In addition, the stretching by lift cylinder 44,45 of draw bar 40
Contracting, can vertically be swung centered on the axis along vehicle traveling direction.
Perching knife 42 configures between front-wheel 11 and rear-wheel 12.Front-wheel 11 is configured in the position than perching knife 42 on the front.Rear-wheel
12 configurations are in the position than perching knife 42 rearward.The rear end 2R of front end 2F and body shell 2 that perching knife 42 configured in body shell 2
Between.Perching knife 42 is supported on draw bar 40.Perching knife 42 is supported on front baffle 22 via draw bar 40.
As described above, perching knife 42 is configured to carry out the upper and lower lifting relative to vehicle via draw bar 40.
Then, the jack-up impact of equipment when being illustrated using Fig. 2 in the present embodiment to operation is absorbed
And to impact absorbing/vibration suppressing mechanism that body vibrations when driving are inhibited.
As shown in Fig. 2, impact absorbing/vibration suppressing mechanism 70 mainly have the first switching valve 71a, the second switching valve 71b,
Third switching valve 71c, the 4th switching valve 71d, the first accumulator 72a, the second accumulator 72b, controller 74 and switch 75.
First switching valve 71a is connect with the lid side loop of lift cylinder 44.The head side of second switching valve 71b and lift cylinder 44 is returned
Road connection.First accumulator 72a is connect via the first switching valve 71a with the lid side loop of lift cylinder 44.Second accumulator 72b
It is connect via the second switching valve 71b with the head side loop of lift cylinder 44.Third switching valve 71c is connected to the first accumulator 72a
Between the second accumulator 72b.
Main valve 73 is connect by oil circuit 81a with the lid side loop of lift cylinder 44.Main valve 73 passes through oil circuit 81b and promotion
The head side loop of cylinder 44 connects.First switching valve 71a is connect with the oil circuit 82a branched out from oil circuit 81a.Second switching valve 71b
It is connect with the oil circuit 82b branched out from oil circuit 81b.
First switching valve 71a and third switching valve 71c is connected with each other by oil circuit 83.First accumulator 72a and oil circuit
83 connections.Second switching valve 71b and third switching valve 71c is connected with each other by oil circuit 84.Second accumulator 72b and oil circuit 84
Connection.
4th switching valve 71d is connect with the lid side loop of lift cylinder 44.4th switching valve 71d is by from oil circuit 81a branch
Oil circuit 82c out and connect with the lid side loop of lift cylinder 44.4th switching valve 71d is connect by oil circuit 85 with fuel tank 90.
The first switching valve 71d of switching valve 71a~the 4th is for example electrically connected with controller 74 respectively.First switching valve 71a~
Movement for example is opened and closed based on the control signal from controller 74 respectively in 4th switching valve 71d.
When the first switching valve 71a is in the state opened, the lid side loop of the first accumulator 72a and lift cylinder 44 connects
It connects.In addition, when the first switching valve 71a is in the state closed, the company of the lid side loop of the first accumulator 72a and lift cylinder 44
It connects cut-off.
When the first switching valve 71a is in the state opened and third switching valve 71c is in the state opened, the first accumulation of energy
Device 72a and the second accumulator 72b both sides connect with the lid side loop of lift cylinder 44.It is opened in addition, being in the first switching valve 71a
State and third switching valve 71c be in close state when, the first accumulator 72a is connect with the lid side loop of lift cylinder 44,
But the connection of the second accumulator 72b and the lid side loop of lift cylinder 44 is cut off.
When the second switching valve 71b is in the state opened, the head side loop of the second accumulator 72b and lift cylinder 44 connects
It connects.In addition, when the second switching valve 71b is in the state closed, the company of the head side loop of the second accumulator 72b and lift cylinder 44
It connects cut-off.
When the second switching valve 71b is in the state opened and third switching valve 71c is in the state opened, the second accumulation of energy
Device 72b and the first accumulator 72a both sides connect with the head side loop of lift cylinder 44.It is opened in addition, being in the second switching valve 71b
State and third switching valve 71c be in close state when, the second accumulator 72b is connect with the head side loop of lift cylinder 44,
But the connection of the first accumulator 72a and the head side loop of lift cylinder 44 is cut off.
The control of impact absorbing/vibration suppressing mechanism 70 is, under the impact absorbing mode of equipment 4, such as opens the
One switching valve 71a and closing the second switching valve 71b and third switching valve 71c.In addition, impact absorbing/vibration suppressing mechanism 70 is controlled
Be made as, under the vibration suppression mode of motor-driven grader 1, such as close the first switching valve 71a and open the second switching valve 71b and
Third switching valve 71c.
The switching of above-mentioned impact absorbing mode with vibration suppression mode can also be carried out by controller 74.It is specific and
Speech, the control of controller 74 is, under the impact absorbing mode of equipment 4, such as opens the first switching valve 71a and closes second
Switching valve 71b and third switching valve 71c.In addition, the control of controller 74 is, and under the vibration suppression mode of motor-driven grader 1, example
It such as closes the first switching valve 71a and opens the second switching valve 71b and third switching valve 71c.
In addition, the switching of above-mentioned impact absorbing mode with vibration suppression mode can also be carried out by switch 75.It opens
Closing 75 is, for example, the manual switch to operate manually by operator.Impact absorbing has been selected in operator's Operation switch 75
In the case where mode, such as opens the first switching valve 71a and close the second switching valve 71b and third switching valve 71c.In addition,
Operator's Operation switch 75 and in the case where having selected vibration suppression mode, such as close the first switching valve 71a and open second
Switching valve 71b and third switching valve 71c.
It is above-mentioned to carry out that the first switching valve 71d of switching valve 71a~the 4th can also directly receive signal from switch 75 respectively
On-off action.In addition, the first switching valve 71d of switching valve 71a~the 4th also can receive the instruction from controller 74 respectively
Above-mentioned on-off action is carried out, which receives the signal from switch 75.
In addition, the first switching valve 71d of switching valve 71a~the 4th respectively can also be with the operation of switch 75 independently, reception
Instruction from controller 74 is to carry out above-mentioned on-off action.In this case, controller 74 can also be based on from operation
The signal of the speed of vehicle and at least one party in the velocity stage of speed changer, to the first switching valve 71d of switching valve 71a~the 4th points
It Fa Song not instruct.Such as in the case where velocity stage becomes F6, F7, F8 or in the case where speed is 35km/h or more,
Can by controller 74 from impact absorbing pattern switching at vibration suppression mode.
It is also possible to lift cylinder 44 shown in Fig. 1 and connects the first impact absorbing/vibration suppressing mechanism 70, and is mentioning
Rise the second impact absorbing/vibration suppression that the connection of cylinder 45 has structure same as the first impact absorbing/vibration suppressing mechanism 70
Mechanism 70.Alternatively, it is also possible to be, the interconnecting piece 70C of single impact absorbing/vibration suppressing mechanism 70 shown in Fig. 2 and promotion
Cylinder 44,45 respective lid side loop connections, and interconnecting piece 70H is connect with lift cylinder 44,45 respective side loops.
As shown in Figure 1, the first accumulator 72a and the second accumulator 72b are for example installed on the side of front baffle 22 respectively.
Then, it is illustrated using control method of the Fig. 2 to the working truck in present embodiment.
As shown in Fig. 2, firstly, in common operation, by the first switching valve 71a~each self closing of third switching valve 71c.
In this state, working oil is supplied from main valve 73 to lift cylinder 44.Equipment 4 moves up and down and carries out operation as a result,.
It then is the impact absorbing mode of equipment 4, which carries out operation for being for example grounded perching knife 42
Situation.Under the impact absorbing mode, the first switching valve 71a is opened, closes the second switching valve 71b and third switching valve 71c.By
It is opened in the first switching valve 71a, therefore oil circuit 82a is connect with oil circuit 83.The lid of first accumulator 72a and lift cylinder 44 as a result,
Side loop connection.
On the other hand, since the second switching valve 71b is closed, the connection of oil circuit 82b and oil circuit 84 is cut off.As a result,
The connection of second accumulator 72b and the head side loop of lift cylinder 44 is cut off.In addition, since third switching valve 71c is closed,
The connection of oil circuit 84 and oil circuit 83 is cut off.The connection of the first accumulator 72a and the head side loop of lift cylinder 44 are also cut as a result,
It is disconnected.
According to above-mentioned, under impact absorbing mode, the first accumulator 72a becomes to be connect with the lid side loop of lift cylinder 44
State.Therefore, in the case where perching knife 42 collides in operation the road surfaces such as rock protrusion etc. and impacted, the first accumulator
The gas chamber (space in diaphragm) of 72a is shunk.The impact of equipment 42 is absorbed by the first accumulator 72a as a result,.
Then be motor-driven grader 1 vibration suppression mode, the mode for example motor-driven grader 1 when driving and perching knife
42 is earth-free and use in the state of lifting from ground.Under the vibration suppression mode, the first switching valve 71a is closed, opens the
Two switching valve 71b and third switching valve 71c.Since the first switching valve 71a is closed, the connection quilt of oil circuit 82a and oil circuit 83
Cutting.The connection of the first accumulator 72a and the lid side loop of lift cylinder 44 is cut off as a result,.
On the other hand, since the second switching valve 71b is opened, oil circuit 82b is connect with oil circuit 84.Second accumulation of energy as a result,
Device 72b is connect with the head side loop of lift cylinder 44.In addition, oil circuit 84 and oil circuit 83 connect since third switching valve 71c is opened
It connects.The first accumulator 72a is also connect with the head side loop of lift cylinder 44 as a result,.
According to above-mentioned, under vibration suppression mode, the first accumulator 72a and the second accumulator 72b both sides become and promotion
The state of the head side loop connection of cylinder 44.Therefore, equipment 42 is maintained as to move up and down.At this point, constituting has the
One accumulator 72a and the respective spring of the second accumulator 72b and the attenuating being made of the throttle of hydraulic circuit
The vibration of dynamic vibration absorber, vehicle body is inhibited.
Then, right with comparative example 1 shown in Fig. 3 and comparative example shown in Fig. 42 for the function and effect of present embodiment
Than being illustrated.
As shown in figure 3, impact absorbing/vibration suppressing mechanism 70a structure in comparative example 1 is compared with the structure of Fig. 2,
Difference is that third switching valve 71c and the second accumulator 72b is omitted.Therefore, accumulator 72a passes through oil circuit 86 and second
Switching valve 71b connection.
It should be noted that the structure of comparative example 1 other than the above is roughly the same with structure shown in Fig. 2, therefore, for
Element identical with structure shown in Fig. 2 and mark identical appended drawing reference, its explanation is not repeated.
In comparative example 1 shown in Fig. 3, under impact absorbing mode, by opening the first switching valve 71a and closing second
Switching valve 71b, so as to which accumulator 72a to be connect with the lid side loop of lift cylinder 44.In addition, under vibration suppression mode,
Pass through and close the first switching valve 71a and open the second switching valve 71b, so as to by the head side of accumulator 72a and lift cylinder 44
Circuit connection.
In the comparative example 1, an accumulator 72a is shared under impact absorbing mode and vibration suppression mode.Therefore,
In the case that the capacity needed for vibration suppression mode is bigger than capacity needed for impact absorption mode, accumulator 72a is unable to fully
Ground absorbs vibration when driving.
As solution to the problems described above, it may be considered that increase the capacity of accumulator 72a.But in this case, exist
The power that equipment 42 presses road surface when operation dies down, and is unable to get desired road surface cutting power.
In addition, as solution to the problems described above, it is also contemplated that impact absorbing in comparative example 2 as shown in Figure 4/
Vibration suppressing mechanism 70b is separately provided the accumulator 72a of impact absorbing and the accumulator 72b of vibration suppression like that.Root
, can be using the capacity for the accumulator 72a that impact absorbing is used as capacity needed for impact absorbing mode according to the structure, and will shake
The capacity for the accumulator 72b that dynamic inhibition is used is as capacity needed for vibration suppression mode.
But in this case, two accumulators 72a, 72b for needing capacity big cause device enlarged.In addition,
In the case that capacity big two accumulators 72a, 72b are installed on the side of front baffle 22 as shown in Figure 1 respectively, operator
Front visual field property be deteriorated.
In contrast, as shown in Fig. 2, the motor-driven grader 1 of present embodiment has the first accumulator 72a and the second accumulation of energy
Device 72b and the first switching valve 71a~third switching valve 71c.As a result, in impact absorbing mode and vibration suppression mode
Under the mode of one side, impact absorbing or vibration suppression can be carried out using the first accumulator 72a and the second accumulator 72b both sides
System.In addition, under the mode of another party in impact absorbing mode and vibration suppression mode, it can be merely with the first accumulator
Impact absorbing or vibration suppression are carried out either in 72a and the second accumulator 72b.
In this way, the first accumulator 72a and second can be used only and store under the mode for needing smaller accumulator volume
Either in energy device 72b.In addition, being able to use the first accumulator 72a under the mode for needing bigger accumulator volume
And the second accumulator 72b both sides.
Thereby, it is possible to obtain accumulator volume corresponding with two mode difference.It therefore, can be under vibration suppression mode
Vibration when driving is fully absorbed, and also can fully obtain 42 road pavement of equipment under impact absorbing mode
Pressing force.
In addition, using the first accumulator 72a and the second accumulator 72b under the mode for needing bigger accumulator volume
Both sides.It is therefore not necessary to realize bigger accumulator volume merely with an accumulator as comparative example 2.Therefore, and only
Realize that the size of accumulator when bigger accumulator volume is compared, and the first accumulator can be reduced using an accumulator
72a and the second respective size of accumulator 72b.Therefore, it is able to suppress the enlargement of device.Even if in addition, by the first accumulation of energy
In the case that device 72a and the second accumulator 72b is respectively arranged in the side of front baffle 22, also it can ensure well operator's
The visual field in front.
In addition, in the present embodiment, the first switching valve 71a~third switching valve 71c control is to rush by controller 74
It hits under absorption mode, open the first switching valve 71a and closes the second switching valve 71b and third switching valve 71c, and press down in vibration
Under molding formula, closes the first switching valve 71a and open the second switching valve 71b and third switching valve 71c.
Even if the capacity of the accumulator needed for vibration suppression mode is than accumulator needed for impact absorption mode as a result,
In the case that capacity is big, the capacity of the accumulator of the mode suitable for both sides can be also obtained.Specifically, in impact absorbing mode
Under, only the first accumulator 72a is connect with the lid side loop of lift cylinder 44.Therefore, it can suitably be inhaled using the first accumulator 72a
Receive impact.In addition, under vibration suppression mode, the head side loop of the first accumulator 72a and the second accumulator 72b and lift cylinder 44
Connection.Therefore, even if in the case that the accumulator volume needed for vibration suppression is bigger than accumulator volume needed for impact absorbing,
Also it can be coped with using total capacity of the first accumulator 72a and the second accumulator 72b.Therefore, it can be adequately suppressed
The vibration of vehicle body when driving.
In addition, in the present embodiment, impact absorbing mode and vibration can also be selected by the manual operation of switch 75
Dynamic suppression mode.Specifically, can also be by the manual operation of switch 75, to select to open the first switching valve 71a and closing
The state of second switching valve 71b and third switching valve 71c and close the first switching valve 71a and open the second switching valve 71b and
The state of third switching valve 71c.
Thereby, it is possible to impact absorbing mode and vibration suppression mode are selected by the operation of operator.
In addition, among the above, as the equipment using above-mentioned impact absorbing/vibration suppressing mechanism 70 to perching knife 42
Be illustrated, as long as but application above-mentioned impact absorbing/vibration suppressing mechanism 70 equipment be disposed on front-wheel 11 and after
Equipment between wheel 12.
Specifically, as shown in figure 5, being also possible to using the equipment of above-mentioned impact absorbing/vibration suppressing mechanism 70
At least one party in perching knife 42 and ridge buster 9.Ridge buster 9 is supported on front baffle 22 via hydraulic cylinder 9a.Pass through the hydraulic cylinder
9a, ridge buster 9 can be moved up and down relative to front baffle 22.
In the case where above-mentioned impact absorbing/vibration suppressing mechanism 70 is applied to ridge buster 9, in the lid of hydraulic cylinder 9a
Side loop connects the interconnecting piece 70C of the oil circuit 81a of impact absorbing/vibration suppressing mechanism 70 shown in Fig. 2.In addition, in hydraulic cylinder
The head side loop of 9a connects the interconnecting piece 70H of the oil circuit 81b of impact absorbing/vibration suppressing mechanism 70 shown in Fig. 2.
By the way that above-mentioned impact absorbing/vibration suppressing mechanism 70 is applied to work of the configuration between front-wheel 11 and rear-wheel 12
Device (such as perching knife 42, ridge buster 9), so as to inhibit the bouncing vibration of motor-driven grader 1.
In addition, being also possible to configuration than front-wheel 11 using the equipment of above-mentioned impact absorbing/vibration suppressing mechanism 70
The equipment of at least one party of the equipment and configuration located on the front in the equipment located rearward than rear-wheel 12.
Specifically, as shown in figure 5, being also possible to using the equipment of above-mentioned impact absorbing/vibration suppressing mechanism 70
At least one party in preceding perching knife 10 and postposition ridge buster 8.The preceding configuration of perching knife 10 is in the position than front-wheel 11 on the front.Preceding perching knife 10
Front baffle 22 is supported on via hydraulic cylinder 10a.By hydraulic cylinder 10a, preceding perching knife 10 can be relative to about 22 front baffle
It is mobile.
In the case where above-mentioned impact absorbing/vibration suppressing mechanism 70 is applied to preceding perching knife 10, hydraulic cylinder 10a's
Lid side loop connects the interconnecting piece 70C of the oil circuit 81a of impact absorbing/vibration suppressing mechanism 70 shown in Fig. 2.In addition, hydraulic
The head side loop of cylinder 10a connects the interconnecting piece 70H of the oil circuit 81b of impact absorbing/vibration suppressing mechanism 70 shown in Fig. 2.
Postposition ridge buster 8 is configured in the position than rear-wheel 12 rearward.Postposition ridge buster 8 is supported on via hydraulic cylinder 8a
Afterframe 21.By hydraulic cylinder 8a, postposition ridge buster 8 can be moved up and down relative to afterframe 21.
In the case where above-mentioned impact absorbing/vibration suppressing mechanism 70 is applied to the postposition ridge buster 8, in hydraulic cylinder 8a
Lid side loop connect impact absorbing/vibration suppressing mechanism 70 shown in Fig. 2 oil circuit 81a interconnecting piece 70C.In addition, in liquid
The head side loop of cylinder pressure 8a connects the interconnecting piece 70H of the oil circuit 81b of impact absorbing/vibration suppressing mechanism 70 shown in Fig. 2.
It is filled by the way that above-mentioned impact absorbing/vibration suppressing mechanism 70 is applied to configuration in the work located on the front than front-wheel 11
(perching knife 10 before such as) or configuration are set in the equipment (such as postposition ridge buster 8) located rearward than rear-wheel 12, can be pressed down
The pitch vibration of motor-driven grader 1 processed.
In addition, the first accumulator 72a in Fig. 2 can have different capacity from the second accumulator 72b, can also have
Identical capacity.In addition, in the case where the first accumulator 72a has different capacity from the second accumulator 72b, the first accumulation of energy
The capacity of device 72a can be bigger than the capacity of the second accumulator 72b, can also be smaller than the capacity of the second accumulator 72b.
In addition, it is also contemplated that required accumulation of energy when the capacity of required accumulator is than vibration suppression mode when impact absorbing mode
The big situation of the capacity of device.Under the impact absorbing mode of the situation, in Fig. 2, the control of controller 74 is to open the first switching
Valve 71a and third switching valve 71c and the second switching valve 71b of closing.In addition, under the vibration suppression mode of the situation, controller
74 controls are to close the first switching valve 71a and third switching valve 71c and open the second switching valve 71b.
In addition, the accumulation of energy that needs of the controller 74 in Fig. 2 in impact absorbing mode and vibration suppression mode are smaller
Under the first mode of device capacity, control to be used either in only the first accumulator 72a and the second accumulator 72b with equipment
Hydraulic cylinder 44,8a, 9a, 10a lid side loop connected with the first circuit in head side loop.In addition, controller 74 is inhaled in impact
Under the second mode for needing bigger accumulator volume in receipts mode and vibration suppression mode, control as the first accumulator
72a and the second accumulator side 72b and equipment hydraulic cylinder 44,8a, 9a, 10a lid side loop and head side loop in
Secondary circuit connection.
This time disclosed embodiment is illustrated in all respects, the content for the property of should not be considered as limitation.The present invention
Range shown by the range that right is pleaded rather than above-mentioned explanation, including the meaning and range same with the range of entitlement requests
Interior is had altered.
Description of symbols:
1 motor-driven grader (working truck), 2 body shells, the front end 2F, the rear end 2R, 3 driver's cabins, 4 equipments, 6 start
Machine room, 7 steering cylinders, 8 postposition ridge busters, 8a, 9a, 10a hydraulic cylinder, 9 ridge busters, perching knife before 10,11 front-wheels, 12 rear-wheels, after 21
Frame, 22 front baffles, 23 hinged cylinders, 40 draw bars, 42 perching knives, 44,45 lift cylinders, 51 counterweights, 70 impact dampening mechanisms, 70C,
70H interconnecting piece, the first switching valve of 71a, the second switching valve of 71b, 71c third switching valve, the 4th switching valve of 71d, the first accumulation of energy of 72a
Device, the second accumulator of 72b, 73 main valves, 74 controllers, 75 switches, 81a, 81b, 82a, 82b, the oil circuit of 82c, 83,84,85,86,
90 fuel tanks.
Claims (9)
1. a kind of working truck, wherein
The working truck has:
Equipment；
Working cylinder drives the equipment；
First switching valve is connect with the lid side loop of the working cylinder；
Second switching valve is connect with the head side loop of the working cylinder；
First accumulator is connect via first switching valve with the lid side loop of the working cylinder；
Second accumulator is connect via second switching valve with the head side loop of the working cylinder；And
Third switching valve is connected between first accumulator and second accumulator.
2. working truck according to claim 1, wherein
The working truck is also equipped with controller, and the controller is by first switching valve, second switching valve and described
The control of three switching valves is, under the impact absorbing mode of the equipment, opens first switching valve and closes described the
Two switching valves and the third switching valve, and under the vibration suppression mode of the working truck, close first switching
Valve and opening second switching valve and the third switching valve.
3. working truck according to claim 1, wherein
The working truck is also equipped with manual switch, which can select the following two kinds state: opening described first and cuts
It changes valve and closes the state of second switching valve and the third switching valve and close first switching valve and open institute
State the state of the second switching valve and the third switching valve.
4. working truck according to any one of claim 1 to 3, wherein
The working truck is also equipped with front-wheel and rear-wheel,
The equipment configuration is between the front-wheel and the rear-wheel.
5. working truck according to claim 4, wherein
The equipment is at least one party in perching knife and ridge buster.
6. working truck according to any one of claim 1 to 3, wherein
The working truck is also equipped with front-wheel and rear-wheel,
Equipment configuration than front-wheel position on the front and than in the position of the rear-wheel rearward at least
One side.
7. working truck according to claim 6, wherein
The equipment is at least one party in preceding perching knife and postposition ridge buster.
8. working truck according to any one of claim 1 to 7, wherein
The working truck is blade machine.
9. a kind of control method of working truck,
The working truck has:
Equipment；
Working cylinder drives the equipment；
First switching valve is connect with the lid side loop of the working cylinder；
Second switching valve is connect with the head side loop of the working cylinder；
First accumulator is connect via first switching valve with the lid side loop of the working cylinder；
Second accumulator is connect via second switching valve with the head side loop of the working cylinder；And
Third switching valve is connected between first accumulator and second accumulator,
The control method of the working truck has the process for proceeding as follows control:
Under the impact absorbing mode of the equipment, opens first switching valve and close second switching valve and institute
Third switching valve is stated, and under the vibration suppression mode of the working truck, closed described in first switching valve and opening
Second switching valve and the third switching valve.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-023854 | 2017-02-13 | ||
| JP2017023854A JP2018131733A (en) | 2017-02-13 | 2017-02-13 | Working vehicle and control method of working vehicle |
| PCT/JP2018/002483 WO2018147096A1 (en) | 2017-02-13 | 2018-01-26 | Work vehicle and work vehicle control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110168174A true CN110168174A (en) | 2019-08-23 |
Family
ID=63107384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880006328.0A Withdrawn CN110168174A (en) | 2017-02-13 | 2018-01-26 | The control method of working truck and working truck |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20190338495A1 (en) |
| JP (1) | JP2018131733A (en) |
| CN (1) | CN110168174A (en) |
| WO (1) | WO2018147096A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11345410B2 (en) * | 2017-10-23 | 2022-05-31 | Kubota Corporation | Work vehicle |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD880533S1 (en) * | 2018-11-23 | 2020-04-07 | Guangxi Liugong Machinery Co., Ltd. | Motor grader |
| US11408144B2 (en) | 2019-08-29 | 2022-08-09 | Deere & Company | Variable float and variable blade impact |
| US11619026B2 (en) * | 2019-10-02 | 2023-04-04 | Caterpillar Inc. | Motor grader suspended mass ride control |
| US11891782B2 (en) | 2020-04-30 | 2024-02-06 | Deere & Company | Ground engaging tool control system and method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5253122Y2 (en) * | 1972-06-15 | 1977-12-02 | ||
| DE3316085A1 (en) * | 1983-05-03 | 1984-11-08 | Hanomag GmbH, 3000 Hannover | Pneumatic-tyred construction machine, such as a wheeled loader, wheeled grader or the like |
| JPH0633011Y2 (en) * | 1989-04-07 | 1994-08-31 | 三菱重工業株式会社 | Vibration suppressor and shock absorber for motor grader |
| JPH02132753U (en) * | 1989-04-07 | 1990-11-05 | ||
| JPH0640002Y2 (en) * | 1989-05-26 | 1994-10-19 | 三菱重工業株式会社 | Active vibration suppressor for motor grader |
| JP2602524Y2 (en) * | 1993-03-05 | 2000-01-17 | 小松メック株式会社 | Running vibration suppression device for wheel type construction machinery |
-
2017
- 2017-02-13 JP JP2017023854A patent/JP2018131733A/en active Pending
-
2018
- 2018-01-26 WO PCT/JP2018/002483 patent/WO2018147096A1/en active Application Filing
- 2018-01-26 CN CN201880006328.0A patent/CN110168174A/en not_active Withdrawn
- 2018-01-26 US US16/475,160 patent/US20190338495A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11345410B2 (en) * | 2017-10-23 | 2022-05-31 | Kubota Corporation | Work vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018147096A1 (en) | 2018-08-16 |
| JP2018131733A (en) | 2018-08-23 |
| US20190338495A1 (en) | 2019-11-07 |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190823 |
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