CN101305652B - Working vehicle - Google Patents
Working vehicle Download PDFInfo
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- CN101305652B CN101305652B CN2008100971274A CN200810097127A CN101305652B CN 101305652 B CN101305652 B CN 101305652B CN 2008100971274 A CN2008100971274 A CN 2008100971274A CN 200810097127 A CN200810097127 A CN 200810097127A CN 101305652 B CN101305652 B CN 101305652B
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Abstract
An operating vehicle includes: a driving mechanism which performs a lifting operation to a ground-operating device connected to the vehicle body with respect to the vehicle body; an operating depth detecting mechanism; a linkage mechanism which links the detecting mechanism with the driving mechanism so that the driving mechanism operates and the operating depth detected by the operating depth detecting mechanism is setting operating depth; the operating vehicle is configured in a manner that the linkage mechanism enables the driving mechanism to operate in the event that the detection depth of the operating depth detecting mechanism has a particular amount of variation towards one side deeper than the setting operating depth, and rising speed of the ground-operating device is larger than dropping speed of the ground-operating device because the detection depth of the operating depth detecting mechanism has a particular amount of variation towards one side shallower than the setting operating depth.
Description
Technical field
The present invention relates to a kind of Operation Van, possess by the car body of a plurality of wheel supports, will be attached on the car body apparatus for work over the ground with respect to the driving mechanism of car body descending operation, be located on the above-mentioned apparatus for work over the ground so as to detect the depth of implements of above-mentioned apparatus for work over the ground depth of implements testing agency, make above-mentioned testing agency and the interlock of above-mentioned driving mechanism and make above-mentioned driving mechanism action so that the detection depth of implements of above-mentioned depth of implements testing agency becomes the link gear of setting depth of implements.
Background technology
Above-mentioned Operation Van carries out the up-down control of apparatus for work over the ground through the operation of the driving mechanism that link gear carries out; No matter the front and back inclinations of vehicle etc. are maintained the depth of implements of setting depth of implements or approaching it and carry out operation while can both incite somebody to action the depth of implements of operation over the ground.
As this Operation Van, the for example tractor described in the JP2005-176696 was arranged in the past.
The described drag gear of the document becomes; On the rear portion of vehicle body frame, linking via linkage has as the rotary tillage device of apparatus for work over the ground, possess hydraulic cylinder in the inside that is located at gearbox as driving mechanism, make be located in the rotary tillage device as the interlinked mechanism of the main operation portion interlock of the control valve of the output arm of the tilling depth testing agency of depth of implements testing agency and hydraulic cylinder and make the feedback mechanism of feedback operation portion interlock of lift arm and the above-mentioned control valve of linkage.
Hydraulic cylinder swings up and down ground operator link mechanism with respect to vehicle body frame, thus with respect to car body descending operation rotary tillage device.
Tilling depth testing agency will cover the rear portion lid at rear of ploughing and weeding rotor as grounding sensor, detect the ploughing and weeding degree of depth of rotary tillage device.That is, based on the angle of oscillation detection ploughing and weeding degree of depth of rear portion lid with respect to upper cap.
Interlinked mechanism and feedback mechanism make the control valve interlock of tilling depth testing agency and hydraulic cylinder, become the state of setting the setting tilling depth that bar sets by tilling depth with the detection tilling depth in tilling depth testing agency and operate hydraulic cylinder down.
In above-mentioned Operation Van; If the depth of implements of apparatus for work becomes more shallow than setting depth of implements over the ground; Then through operation based on the operating portion of the linkage structure of the testing result of depth of implements testing agency; Driving mechanism will drive apparatus for work step-down operation over the ground, and the depth of implements of apparatus for work deepens over the ground.At this moment, the decline of apparatus for work is fast more over the ground, and the depth of implements of apparatus for work deepens more sharp over the ground, acts on going and driving load on the vehicle and increases sharp easily.
In addition; If the depth of implements of apparatus for work becomes darker than setting depth of implements over the ground; Then through the operation based on the operating portion of the linkage structure of the testing result of depth of implements testing agency, driving mechanism is lift operations on the apparatus for work over the ground, and the depth of implements of apparatus for work shoals over the ground.At this moment, the rising of apparatus for work is slow more over the ground, and the minimizing of the depth of implements of apparatus for work expends time in more over the ground, act on because depth of implements is dark on the vehicle go and to drive the bigger time of load elongated.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can be difficult for taking place above-mentionedly going and driving the problem of load and can the depth of implements of apparatus for work over the ground be maintained the Operation Van that sets depth of implements or approach its degree of depth.
A kind of Operation Van possesses:
Car body is by a plurality of wheel supports;
Driving mechanism is with being attached at apparatus for work over the ground on the above-mentioned car body with respect to the car body descending operation;
Depth of implements testing agency is arranged on the above-mentioned apparatus for work over the ground, so that detect the depth of implements of above-mentioned apparatus for work over the ground;
Link gear makes the action of above-mentioned driving mechanism, so that above-mentioned testing agency links with above-mentioned driving mechanism, the detection depth of implements of above-mentioned depth of implements testing agency becomes the setting depth of implements;
It is characterized in that, constitute,
Because of the detection depth of implements of above-mentioned depth of implements testing agency to than set the dark side of depth of implements change a certain amount of make the rate of climb that above-mentioned apparatus for work over the ground rises than because of the detection depth of implements of above-mentioned depth of implements testing agency to changing above-mentioned a certain amount of making under the decrease speed state greatly that above-mentioned apparatus for work over the ground descends than setting the shallow side of depth of implements, above-mentioned link gear makes above-mentioned driving mechanism operation.
According to such structure, can go up and down to control over the ground apparatus for work so that over the ground the depth of implements of apparatus for work become and set depth of implements or the depth of implements approaching with it.
That is, if the depth of implements of the apparatus for work depth of implements that becomes than sets is dark over the ground, then based on the detection depth of implements of depth of implements testing agency, link gear operating operation portion.So driving mechanism is by to rising side drive operation, with lift operations on the apparatus for work over the ground so that the depth of implements of depth of implements testing agency becomes the setting depth of implements.
On the other hand, if the depth of implements of the apparatus for work depth of implements that becomes than sets is shallow over the ground, then based on the detection depth of implements of depth of implements testing agency, link gear operating operation portion.So driving mechanism is by to decline side drive operation, with apparatus for work step-down operation over the ground so that the depth of implements of depth of implements testing agency becomes the setting depth of implements.
Apparatus for work over the ground by on during lift operations, move fast when being lowered by operation and rise easily.
Promptly; Even the variable quantity of the detection depth of implements of the depth of implements testing agency of the variable quantity of the detection depth of implements of the depth of implements testing agency when carrying out the last lift operations of apparatus for work over the ground during with the step-down operation of carrying out apparatus for work over the ground is identical, through go up based on the detection depth of implements of depth of implements testing agency lift operations over the ground the speed that rises of apparatus for work also than based on the detection depth of implements of depth of implements testing agency and step-down operation the speed that descends of apparatus for work is big over the ground.So, under the situation of last lift operations, to compare with the situation of step-down operation, inertia acts on over the ground on the apparatus for work more easily, and moving of apparatus for work becomes rapid easily over the ground.
Thereby the rising of the apparatus for work over the ground when depth of implements deepens is rapider, deepens advancing and drive load and promptly reducing easily of the automobile that increases because of depth of implements.In addition, the decline of the apparatus for work over the ground when depth of implements shoals is slower, the going and drive the rapid variation of load of the automobile that be difficult for to take place to bring because of the decline of apparatus for work over the ground.As a result, the fault of the rotating speed reduction of the engine of the difficult up-down control that results from apparatus for work over the ground etc. can high efficiency and operation swimmingly.
In embodiment, preferably, link gear makes above-mentioned testing agency and is equipped between the operating portion on the above-mentioned driving mechanism and links, and through transmit the displacement of testing agency via operating portion, makes above-mentioned driving mechanism action.
And then, in embodiment, preferably,
Aforesaid operations portion possess the neutral condition of the driving condition that switches to the above-mentioned driving mechanism of driving operations freely and the above-mentioned driving mechanism of shut-down operation the operating portion main body, aforesaid operations portion main body handover operation is the driving operations body of above-mentioned driving condition and is the neutral operating body of above-mentioned neutral condition with aforesaid operations portion main body handover operation;
Above-mentioned link gear possess the driving interlinked mechanism that makes above-mentioned depth of implements testing agency and above-mentioned driving operations body interlock, make the neutral interlinked mechanism of above-mentioned driving mechanism and above-mentioned neutral operating body interlock and make above-mentioned driving operations body and above-mentioned neutral operating body interlock so that above-mentioned neutral interlinked mechanism interlock is operated the operating body interlinked mechanism of above-mentioned driving operations body in above-mentioned neutral operating body when the above-mentioned apparatus for work over the ground of last lift operations.
According to such structure, if the depth of implements of apparatus for work becomes darker or shallow than setting depth of implements over the ground, then based on the detection depth of implements of depth of implements testing agency, driving interlinked mechanism is driving condition with operating portion main body handover operation.Thus, along with apparatus for work rising or decline over the ground, based on the action of driving mechanism, neutral interlinked mechanism is a neutral condition with the recovery operation of operating portion main body, and apparatus for work becomes depth of implements for setting the binding height of depth of implements over the ground.Meanwhile, promptly carry out the rising of apparatus for work over the ground easily.
Promptly; When along with apparatus for work over the ground by last lift operations and neutral interlinked mechanism is operated neutral operating body, when the recovery operation of operating portion main body is neutral condition; Neutral interlinked mechanism interlock is in neutral operating body and operating operation body interlinked mechanism, operating body interlinked mechanism operation driving operations body.So, when apparatus for work is by last lift operations over the ground, when neutral interlinked mechanism will be neutral condition with the recovery operation of operating portion main body, can the driving operations body be operated to uplifted side through the operating body interlinked mechanism.Thus; Can make through make the unit change amount to the dark side of the detection depth of implements of depth of implements testing agency change and over the ground the rate of climb that rises of apparatus for work become than through make the unit change amount to the more shallow side of detection depth of implements of depth of implements testing agency change and over the ground the decrease speed that descends of apparatus for work and carry out the operation of driving mechanism greatly.
In embodiment, preferably, aforesaid operations body interlinked mechanism possesses connecting rod and interlock with above-mentioned slot and is attached on the above-mentioned neutral operating body and the engaging body that engages with above-mentioned slot; Aforesaid operations body interlinked mechanism constitutes; When the above-mentioned apparatus for work over the ground of last lift operations; Be connected to through above-mentioned engaging body on the end of above-mentioned slot, will pass to above-mentioned driving operations body via aforesaid operations body interlinked mechanism from the driving force of above-mentioned driving mechanism.
In embodiment; Aforesaid operations body interlinked mechanism constitutes; When the above-mentioned apparatus for work over the ground of the operation that descends; Through the butt of an end of above-mentioned engaging body and above-mentioned slot is removed, make that the driving force from above-mentioned driving mechanism does not pass to above-mentioned driving operations body via aforesaid operations body interlinked mechanism.
Description of drawings
Fig. 1 is the end view at the rear portion of Operation Van.
Fig. 2 is the end view of link gear.
Fig. 3 is the vertical view of link gear.
Fig. 4 is the rearview of operating portion.
Fig. 5 is the hydraulic circuit diagram that hydraulic cylinder is used.
Fig. 6 is the key diagram of the mode of operation of the tilling depth of the expression tillage device active state and the operating portion that are in the link gear under the state of setting tilling depth.
Fig. 7 is the key diagram of mode of operation of active state and the operating portion of the link gear of the tilling depth of expression tillage device when changing to than setting the shallow side of tilling depth.
Fig. 8 is expression along with the tilling depth of the step-down operation of tillage device, tillage device reverts to the key diagram of mode of operation of active state and the operating portion of the link gear when setting tilling depth.
Fig. 9 is the key diagram of mode of operation of active state and the operating portion of the link gear of the tilling depth of expression tillage device when changing to than setting the dark side of tilling depth.
The key diagram of the active state of the link gear of Figure 10 when to be expression along with the tilling depth of the last lift operations of tillage device, tillage device revert to the setting tilling depth and the mode of operation of operating portion.
Embodiment
Below, based on the description of drawings embodiments of the invention
Fig. 1 is the end view at rear portion of the Operation Van of embodiments of the invention.The Operation Van of embodiments of the invention possess pair of right and left front-wheel (not shown), pair of right and left drive freely rear wheel 1,1, have the vehicle of the Drive Section that is equipped with the driving seat 2 that is located at rear vehicle and be located at this vehicle vehicle body frame 3 the rear portion linkage 10 and constitute.The Operation Van of embodiments of the invention links via aforementioned link mechanism 10 at rear vehicle has rotary tillage device 20 (rotary tiller) (hereinafter to be referred as making tillage device 20), constitutes the ride-type cultivator.
Promptly; As shown in Figure 1, aforementioned link mechanism 10 possesses the pair of right and left lift arm 11,11 on the top that swings up and down the gearbox 4 that is located at the rear portion that constitutes above-mentioned vehicle body frame 3 freely, swings up and down the low connecting rod 12,12 (lower link) of the pair of right and left of extending freely from the bottom of above-mentioned gearbox 4 towards the car body rear, swing up and down the top connecting rod 14 that extends freely towards the car body rear and the lifting arm 15 (lift rod) that lift arm 11 and low connecting rod 12 linked in the left and right sides of linkage 10 and constituting from the top link bracket 13 at the rear portion that is located at above-mentioned gearbox 4.
The extension end of low connecting rod 12,12 of above-mentioned pair of right and left and above-mentioned top connecting rod 14 is attached on the framework of being located on the tillage device 20 21.Above-mentioned pair of right and left lift arm 11,11 is via a rotation fulcrum 16 that pair of right and left lift arm 11,11 is attached on the gearbox 4, with hydraulic cylinder 5 (with reference to Fig. 4, Fig. 5) interlock of the inside that is positioned at above-mentioned gearbox 4.
Promptly; Aforementioned link mechanism 10 swings up and down operation pair of right and left lift arm 11,11 and is swung up and down operation with respect to vehicle body frame 3 through the rotary manipulation of the rotation fulcrum 16 that undertaken by above-mentioned hydraulic cylinder 5; Tillage device 20 descending operations are the decline job state of its ploughing and weeding rotor 22 ground connection and the rising job state that ploughing and weeding rotor 22 rises from ground, and with the tillage device under the decline job state 20 with respect to vehicle body frame 3 descending operations.Thus; Above-mentioned hydraulic cylinder 5 go up and down to be regulated tillage device 20 with respect to Operation Van, the ploughing and weeding degree of depth of the ploughing and weeding rotor 22 of change tillage device 20 (below be called tilling depth) no matter or Operation Van be maintained necessarily with respect to the tilling depth that the front and back of running ground tilt and go up and down all tillage device 20.
Operation Van possesses the power taking-up axle 6 that rotation is located at the rear portion of above-mentioned gearbox 4 freely, the driving force of the engine that is located at Vehicular body front (not shown) output is taken out axle 6 from above-mentioned power pass to tillage device 20 via the rotating drive shaft 7 that is attached on this power taking-up axle 6.
As shown in Figure 4, Operation Van possesses the operating portion 30 that is located on the above-mentioned gearbox 4 in order to operate above-mentioned hydraulic cylinder 5.Like Fig. 1, Fig. 2, shown in Figure 6, the tilling depth that Operation Van possesses the driving operations body 31 that makes aforesaid operations portion 30 and neutral operating body 32 (with reference to Fig. 4) and the link gear S that is located at tilling depth testing agency 50 interlocks on the above-mentioned tillage device 20 and is positioned at the horizontal side of above-mentioned driving seat 2 is set bar 8.
Thus; Operation Van's control tillage device 20; Even so that Operation Van because of front vehicle wheel (not shown) or rear wheel 1 to the entering of the recess of running ground or to the protrusion of running ground ride with respect to running ground to tilt or go up and down to the car body fore-and-aft direction, the tilling depth of tillage device 20 also becomes by tilling depth sets set depth that bar 8 sets or the tilling depth approaching with it.
Fig. 4 is the rearview of aforesaid operations portion 30.Fig. 5 is the hydraulic circuit diagram that is used for operating hydraulic cylinder 5.Shown in these figure; Aforesaid operations portion 30 also possesses the operating portion main body 33 in the inside that is located at above-mentioned gearbox 4 and makes the spool operating axis 34 of this operating portion main body 33 and the balance connecting rod 35 of above-mentioned driving operations body 31 and 32 interlocks of neutral operating body except possessing above-mentioned driving operations body 31 with the above-mentioned neutral operating body 32.
Like Fig. 4, shown in Figure 5, aforesaid operations portion main body 33 possesses and connects the clack box 36 be arranged on the above-mentioned gearbox 4, is housed in main valve plug 37, lowering valve 38, safety valve 39 (relief valve) and feather valve 40 (unload valve) in this clack box 36.Main valve plug 37 is attached on the above-mentioned spool operating axis 34.The operating axis 38a of lowering valve 38 is fastened on and is connected with on the rod of the interlock on the above-mentioned spool operating axis 34 41.
Above-mentioned balance connecting rod 35 portion's rotation therebetween is attached on the operation arm 34a of above-mentioned spool operating axis 34 freely.Above-mentioned driving operations body 31 possesses a rotation axial region 31a and the one rotation is bearing in the swing arm 31b on this rotation axial region 31a freely, props up axial region 31a rotation by above-mentioned rotation and is bearing in freely on the 4a of cross wall portion of above-mentioned gearbox 4.Above-mentioned swing arm 31b is fastened on the distolateral of above-mentioned balance connecting rod 35.Above-mentioned neutral operating body 32 possesses a rotation axial region 32a and the one rotation is bearing in the swing arm 32b on this rotation axial region 32a freely, props up axial region 32a rotation by above-mentioned rotation and is bearing in freely on the above-mentioned cross wall 4a of portion.It is distolateral that above-mentioned swing arm 32b is fastened on another of above-mentioned balance connecting rod 35.
Fig. 5 representes the above-mentioned balance connecting rod 35 and the connecting pin 42 of above-mentioned arm 34a binding are in the state of neutral position.If above-mentioned connecting pin 42 is in the neutral position, then main valve plug 37 is discharged guide's hydraulic pressure from feather valve 40, and interlock rod 41 is operating as closed condition with lowering valve 38.So feather valve 40 turns back in the case hydraulic pressure from hydraulic pump 43, the oil extraction of lowering valve 38 stop solution cylinder pressures 5.That is, operating portion main body 33 becomes neutral condition, with shut-down operation hydraulic cylinder 5.
If the state that is in neutral condition from operating portion main body 33 begins above-mentioned driving operations body 31 around the axle center of a rotation axial region 31a to uplifted side " U " swinging operation, then the swing arm 31b of driving operations body 31 serves as swing fulcrum and swinging operation with balance connecting rod 35 with the side by the swing arm 32b supporting of neutral operating body 32.So above-mentioned connecting pin 42 to clack box 36 side shiftings, overcomes decline force application spring 44 to uplifted side " U " slide, handover operation main valve plug 37 with spool operating axis 34 from the neutral position.At this moment, the interlock rod 41 operating axis 38a with respect to lowering valve 38 relatively move, and lowering valve 38 is maintained closed condition.So main valve plug 37 pressure oil of self-hydraulic pump 43 in the future supplies in the hydraulic cylinder 5.That is, operating portion main body 33 becomes the driving condition of uplifted side, so that it is driven into the side that lift arm 11 rises with hydraulic cylinder 5.
At this moment; If with above-mentioned neutral operating body 32 around the axle center of rotation axial region 32a to direction of rotation " A " swinging operation; The swing arm 32b of then neutral operating body 32 supports balance connecting rod 35 with the swing arm 31a by driving operations body 31 a side is a swing fulcrum swinging operation, and the above-mentioned connecting pin 42 of balance connecting rod 35 is to a side shifting of leaving from clack box 36.If the operational ton of neutral operating portion 32 is suitable, then above-mentioned connecting pin 42 is got back to the neutral position, and operating portion main body 33 reverts to neutral condition.
If the state that is in neutral condition from operating portion main body 33 begins above-mentioned driving operations body 31 around the axle center of a rotation axial region 31a to decline side " D " swinging operation, then the swing arm 31b of driving operations body 31 serves as swing fulcrum swinging operation with balance connecting rod 35 with the side by the swing arm 32b supporting of neutral operating body 32.So to moving with clack box 36 side opposition sides, spool operating axis 34 is lowered by force application spring 44 to decline side " D " slide, handover operation main valve plug 37 to the connecting pin 42 of balance connecting rod 35 from the neutral position.At this moment, interlock rod 41 operating axis 38a draw operations with lowering valve 38, lowering valve 38 becomes open mode.So feather valve 40 turns back in the case pressure oil from hydraulic pump 43, lowering valve 38 is discharged the pressure oil of hydraulic cylinder 5.That is, operating portion main body 33 becomes the driving condition of decline side, so that it is driven into the side that lift arm 11 descends with hydraulic cylinder 5.Above-mentioned decline force application spring 44 switches to operating portion main body 33 driving condition and the application of force of decline side.
At this moment; If with above-mentioned neutral operating body 32 around the axle center of rotation axial region 32a to direction of rotation " B " swinging operation; The swing arm 32b of then neutral operating body 32 supports balance connecting rod 35 with the swing arm 31b by driving operations body 31 a side is a swing fulcrum swinging operation, and the connecting pin 42 of balance connecting rod 35 is to clack box 36 side shiftings.If the operational ton of neutral operating portion 32 is suitable, then the connecting pin 42 of balance connecting rod 35 is got back to the neutral position, and operating portion main body 33 reverts to neutral condition.
As shown in Figure 1, above-mentioned tilling depth testing agency 50 is made up of rotor rear lid.
That is,, be bearing in via connecting pin 52 under the state that rotor rear lid 50 constitutes at the rear that covers ploughing and weeding rotor 22 above the rotor on the lid 51 like Fig. 1, shown in Figure 6.Rotor top lid 51 is fixed on the framework 23 of tillage device 20.Above-mentioned connecting pin 52 is attached at the upper end rotation of rotor rear lid 50 on the rearward end of rotor top lid 51 freely.The upper end side that lower end side is attached at the splinter bar 53 on the free end of rotor rear lid 50 swings up and down and is bearing in freely on the carriage 54 that is had from said frame 23 extended supporting arms 24.Be installed in lid decline spring 55 on this splinter bar 53 with above-mentioned carriage 54 as reacting force part and with the splinter bar 53 decline application of forces.
That is, rotor rear lid 50 is supported to around the axle center P of the lateral direction of car of above-mentioned connecting pin 52 and swings up and down with respect to the framework 23 of tillage device 20, by the above-mentioned lid decline spring 55 decline application of forces so that its ground connection on the ground after the ploughing and weeding of ploughing and weeding rotor 22.Thus, if the tilling depth of tillage device 20 changes, then rotor rear lid 50 goes up and down with respect to lid 51 swings of rotor top around above-mentioned axle center P thereupon, and rotor rear lid 50 changes with respect to the angle of oscillation of rotor top lid 51.That is, rotor rear lid 50 detect its with respect to the angle of oscillation of rotor top lid 51 as tilling depth.
Fig. 2 is the end view of above-mentioned link gear S.Fig. 3 is the vertical view of above-mentioned link gear S.Shown in these figure, above-mentioned link gear S possesses: have above-mentioned rotation that one rotation is located at above-mentioned driving operations body 31 freely and prop up the driving interlinked mechanism 60 of the driving operations arm 61 on the axial region 31a, have above-mentioned rotation that the one rotation is located at above-mentioned neutral operating portion 32 freely and prop up the neutral interlinked mechanism 70 of the neutral motion arm 71 on the axial region 32a and have the operating body interlinked mechanism 80 that the output connecting rod 81 on the axial region 32a is propped up in above-mentioned rotation that the one rotation is located at above-mentioned neutral operating body 32 freely.
Like Fig. 2, shown in Figure 3; Above-mentioned driving interlinked mechanism 60 also possesses via connecting pin 61a one and distolaterally is attached at valve side connecting rod 62 on this driving operations arm 61, is attached at interlock rod 64 on the end of this sensor side connecting rod 63 via linkage pin 63a interlock in the end of another distolateral sensor side connecting rod 63 of this valve side connecting rod 62, car body front side via connecting pin 63b, is attached at the sensor that Operation Van's side end of cable-side transfer connecting rod 66 and inner cable 67a on the rotation fulcrum 65b that bar side transfer connecting rod 65, one rotation on the end of car body rear side of this interlock rod 64 be located at this bar side middle rank connecting rod 65 freely is attached on this cable-side transfer connecting rod 66 via connecting piece 65a and links cable 67 except possessing above-mentioned driving operations arm 61.
As shown in Figure 6, the tillage device side end that the sensor links the above-mentioned inner cable 67a of cable 67 be attached at that above-mentioned rotor top lid 51 possessed in turn on 68 the cable side arm 68a.68 axis swings around connecting pin 69a of turning in above-mentioned are located on the carriage of being located on the above-mentioned rotor top lid 51 69 freely.Turn 68 except possessing above-mentioned cable side arm 68a in being somebody's turn to do, also possess the interlock rod 68c that the one swing is attached at the sensor side arm 68b on this cable side arm 68a freely and makes this sensor side arm 68b interlock lid 50 in above-mentioned rotor rear.Thus, the sensor link cable 67 interlocks in the rotor rear lid 50 so that it will pass to cable-side transfer connecting rod 66 as the swing of the detection information of rotor rear lid 50.
The above-mentioned rotation fulcrum 65b rotation of above-mentioned bar side transfer connecting rod 65 is bearing on the above-mentioned top link bracket 13 freely.Above-mentioned bar side transfer connecting rod 65 links cable 67 draw operations through the return spring RB that is bearing on the above-mentioned rotation fulcrum 65b with the sensor with above-mentioned cable-side transfer connecting rod 66, and by the direction swing application of force to the above-mentioned interlock rod 64 of bulldozing operation.
Like Fig. 2, shown in Figure 3, above-mentioned valve side connecting rod 62 possesses and is located at the slotted hole 62a of interlock in a side of the sensor side connecting rod 63.Make the above-mentioned valve side connecting rod 62 and the above-mentioned linkage pin 63a of the sensor side connecting rod 63 interlocks slide and rotate to be entrapped in freely under the state among the above-mentioned slotted hole 62a and supported by sensor side connecting rod 63.The end that is positioned at a side opposition side that is positioned at above-mentioned connecting pin 63a with respect to the above-mentioned linkage pin 63a of the sensor side connecting rod 63 is attached on the bearing connecting rod 82 via connecting pin 62a.
Like Fig. 2, shown in Figure 3, the rotation fulcrum 82b of the tube axle shape of above-mentioned bearing connecting rod 82 is bearing in above-mentioned tilling depth freely via fulcrum 8a rotation and sets on the bar 8, and sensor side connecting rod 63 is bearing in tilling depth via above-mentioned bearing connecting rod 82 with fulcrum 8a and sets on the bar 8.
Like Fig. 2, shown in Figure 3; Above-mentioned neutral interlinked mechanism 70 is except possessing above-mentioned neutral motion arm 71, and the end rotation that also possesses the car body front side is attached at the excellent cramp bar 74 on the end of interlock rod 72 and leading section on this neutrality motion arm 71 be attached at this interlock rod 72 through a pair of dog screw 73,73 car body rear side freely.
The base portion of above-mentioned excellent cramp bar 74 is bearing on the position with respect to the biasing of the swinging center of lift arm 11 of base portion of lift arm 11.Thus, excellent cramp bar 74 make interlock rod 72 via lift arm 11 interlocks in above-mentioned hydraulic cylinder 5.
Like Fig. 2, shown in Figure 3; Aforesaid operations body interlinked mechanism 80 also possesses an end and rotates transfer connecting rod 84, above-mentioned bearing connecting rod 82, the sensor side connecting rod 63, above-mentioned valve side connecting rod 62 and the above-mentioned driving operations arm 61 that the interlock rod 83, the rotation that are attached at freely on this output connecting rod 81 link the other end of this interlock rod 83 freely except possessing above-mentioned output connecting rod 81.
As shown in Figure 4, above-mentioned output connecting rod 81 rotates on the rotation fulcrum 71a of the tube axle shape that is attached at above-mentioned neutral motion arm 71 freely through one, and the one rotation is attached at the rotation of above-mentioned neutral operating body 32 freely and props up on the axial region 32a.As shown in Figure 3, above-mentioned transfer connecting rod 84 one rotation is attached on above-mentioned the axial region 82b of above-mentioned bearing connecting rod 82 freely.Thus, transfer connecting rod 84 receives above-mentioned tilling depth to set bar 8 supportings via above-mentioned rotation fulcrum 82b and above-mentioned fulcrum 82a, and swings integratedly with bearing connecting rod 82.
Promptly; Above-mentioned driving interlinked mechanism 60 makes rotor rear lid 50 and above-mentioned driving operations body 31 interlocks; So that along with the detection tilling depth of rotor rear lid 50 changes to a dark side of the setting tilling depth of setting bar 8 than tilling depth or a shallow side, the operating portion main body 33 of operating portion 30 is switched to corresponding to the uplifted side of the variation that detects tilling depth or the driving condition of decline side.Above-mentioned neutral interlinked mechanism 70 makes hydraulic cylinder and above-mentioned neutral operating portion 30 interlocks, so that become the binding height of setting tilling depth along with hydraulic cylinder 5 rises tillage device 20 or drops to its tilling depth, makes the operating main body 33 of operating portion 30 revert to neutral condition.Aforesaid operations body interlinked mechanism 80 makes above-mentioned driving operations body 31 and above-mentioned neutral operating body 32 interlocks so that through make the unit change amount to the darker side of the detection tilling depth of rotor rear lid 50 change, tillage device 20 become than through making the unit change amount to the more shallow decline variable quantity that a side changes, tillage device 20 is lowered by operation of the detection tilling depth of rotor rear lid 50 and decrease speed greatly by the rising variable quantity of last lift operations and the rate of climb.
That is, Fig. 6 is the key diagram of the mode of operation of the tilling depth of expression tillage device 20 active state and the operating portion 30 that are in the above-mentioned link gear S under the state of setting tilling depth.
As shown in the drawing, if the tilling depth of tillage device 20 is in the setting tilling depth, then rotor rear lid 50 becomes corresponding to the benchmark angle of oscillation of setting tilling depth with respect to the angle of oscillation of rotor top lid 51.So; Detection tilling depth based on rotor top lid 51; Driving interlinked mechanism 60 is operating as the driving operations body 31 of operating portion 30 corresponding to the benchmark posture of setting tilling depth; Based on the swing state as the lift cylinder 11 of the mode of operation of hydraulic cylinder 5, neutral interlinked mechanism 70 is operating as neutral posture with the neutral operating body 32 of operating portion 30.So through the operation of driving operations body 31 and 32 pairs of balance connecting rods 35 of neutral operating body, the connecting pin 42 of balance connecting rod 35 becomes the neutral position.Thus, operating portion main body 33 is operating as neutral condition, with hydraulic cylinder 5 shut-down operations.
Fig. 7 is the key diagram of mode of operation of active state and the operating portion 30 of the above-mentioned link gear S of the tilling depth of expression tillage device 20 when changing to than setting the shallow side of tilling depth.
Along with the tilling depth of tillage device 20 to changing than setting the shallow side of tilling depth, rotor rear lid 50 descends with respect to rotor top lid 51.Thus; If the tilling depth of tillage device 20 is to changing than setting the shallow side of tilling depth; Then as shown in Figure 7; Drive the bulldozing operation of interlinked mechanism 60 through the interlock rod 64 that undertaken by the decline swing of rotor rear lid 50 make sensor side connecting rod 63 around the axle center of connecting pin 82a to car body front side swinging operation; Make the linkage pin 63a of sensor side connecting rod 63 move to the car body front side of the slotted hole 62a of valve side connecting rod 62, allow the swinging operation that the decline active force of the operating portion 30 through driving operations arm 61 carries out, the driving operations body 31 of operating portion 30 is operated to the decline side from the benchmark posture through the decline active force of operating portion 30.At this moment, because hydraulic cylinder 5 also stops, so the neutral motion arm 71 of neutral interlinked mechanism 70 is operating as neutral posture with the neutral operating body 32 of operating portion 30.So; The swing arm 31b of driving operations body 31 supports balance connecting rod 35 with the swing arm 32b by neutral operating body 32 a side is a swing fulcrum swinging operation; The connecting pin 42 of balance connecting rod 35 moves from the neutral position to a side of leaving with respect to clack box 36 (decline side D), and the operating portion main body 33 of operating portion 30 switches to the driving condition of decline side.Thus, hydraulic cylinder 5 is operated to the decline side drive, with tillage device 20 step-down operations.
Fig. 8 is expression along with the tilling depth of the step-down operation of tillage device 20, tillage device 20 reverts to the key diagram of mode of operation of active state and the operating portion 30 of the above-mentioned link gear S when setting tilling depth.
If along with the step-down operation of tillage device 20, the tilling depth of tillage device 20 reverts to the setting tilling depth, descends when then lift arm 11 begins than step-down operation.Thus; If the tilling depth of tillage device 20 reverts to the setting tilling depth; Then as shown in Figure 8; Neutral interlinked mechanism 70 through by the bulldozing operation of the interlock rod 72 that carries out as the decline power of the lift arm 11 of the action force of hydraulic cylinder 5 with neutral motion arm 71 swinging operation, make the neutral operating portion 32 of operating portion 30 begin action from the benchmark posture.So; The swing arm 32b of neutral operating body 32 supports balance connecting rod 35 with the swing arm 31b by driving operations body 31 a side is a swing fulcrum swinging operation; The connecting pin 42 of balance connecting rod 35 reverts to the neutral position to clack box 36 side shiftings, and the operating main body 33 of operating portion 30 reverts to neutral condition.Thus, hydraulic cylinder 5 stops, and makes tillage device 20 become tilling depth for setting the binding height of tilling depth.
Fig. 9 is the key diagram of mode of operation of active state and the operating portion 30 of the above-mentioned link gear S of the tilling depth of expression tillage device 20 when changing to than setting the dark side of tilling depth.
Along with the tilling depth of tillage device 20 to changing than setting the dark side of tilling depth, rotor rear lid 50 rises with respect to rotor top lid 51.Thus; If the tilling depth of tillage device 20 is to changing than setting the dark side of tilling depth; Then as shown in Figure 9; Drive the draw operations of interlinked mechanism 60 through the interlock rod 64 that undertaken by the rising swing of rotor rear lid 50 make sensor side connecting rod 63 around the axle center of connecting pin 82a to car body rear side swinging operation; Through the linkage pin 63a bulldozing operation valve side connecting rod 62 of sensor side connecting rod 63,, the driving operations body 31 of operating portion 30 is operated to uplifted side from the benchmark posture through these valve side connecting rod 62 swinging operation driving operations arms 61.At this moment, because hydraulic cylinder 5 also stops, so the neutral motion arm 71 of neutral interlinked mechanism 70 is operating as neutral posture with the neutral operating body 32 of operating portion 30.So; The swing arm 31b of driving operations body 31 supports balance connecting rod 35 with the swing arm 32b by neutral operating body 32 a side is a swing fulcrum swinging operation; The connecting pin 42 of balance connecting rod 35 moves from the neutral position to clack box 36 1 sides (uplifted side U), and the operating portion main body 33 of operating portion 30 switches to the driving condition of uplifted side.Thus, hydraulic cylinder 5 is operated to the rising side drive, with lift operations on the tillage device 20.
The key diagram of the active state of the above-mentioned link gear S of Figure 10 when to be expression along with the tilling depth of the last lift operations of tillage device 20, tillage device 20 revert to the setting tilling depth and the mode of operation of operating portion 30.
If along with the last lift operations of tillage device 20, the tilling depth of tillage device 20 revert to the setting tilling depth, rise when then lift arm 11 begins than last lift operations.Thus; If the tilling depth of tillage device 20 reverts to the setting tilling depth; Then shown in figure 10; Neutral interlinked mechanism 70 through by the draw operations of the interlock rod 72 that carries out as the climbing power of the lift arm 11 of the action force of hydraulic cylinder 5 with neutral motion arm 71 swinging operation, make the neutral operating portion 32 of operating portion 30 begin action from the benchmark posture.So; The swing arm 32b of neutral operating body 32 supports balance connecting rod 35 with the swing arm 31b by driving operations body 31 a side is a swing fulcrum swinging operation; The connecting pin 42 of balance connecting rod 35 reverts to the neutral position to a side shifting of leaving with respect to clack box 36, and the operating main body 33 of operating portion 30 reverts to neutral condition.Thus, hydraulic cylinder 5 stops, and makes tillage device 20 become tilling depth for setting the binding height of tilling depth.
Like Fig. 7, shown in Figure 8, when lift arm 11 step-down operations, no matter the motion action of operating body interlinked mechanism 80 neutral interlinked mechanisms 70 is how, all inoperation driving operations body 31.That is, when lift arm 11 step-down operations, output connecting rod 81 interlocks are swung around the upper left side of axle center in accompanying drawing of a rotation axial region 32a in neutral operating body 32, and the driving force of output connecting rod 81 is delivered to bearing connecting rod 82 via interlock rod 83 with transfer connecting rod 84.So bearing connecting rod 82 around the right side swinging operation of connecting pin 63b in accompanying drawing, is operated with linkage pin 63a sensor side connecting rod 63 around the right side swing of the axle center of fulcrum 8a in accompanying drawing to the side away from the left end in the accompanying drawing of slotted hole 62a.Thus, when the step-down operation of lift arm 11, operating body interlinked mechanism 80 blocks the interlock of neutral operating body 32 with driving operations body 31, will be to the releasing that applies of the operating physical force of driving operations body 31.
If the angle of oscillation of rotor rear lid 50 is positioned at the blind band as the benchmark angle of oscillation along with the step-down operation of lift arm 11; Then through resulting from the swinging operation around the axle center of connecting pin 82a of rotor rear lid 50 with respect to the sensor side connecting rod 63 that is undertaken by interlock rod 64 of the rising of rotor top lid 51; Linkage pin 63a is positioned at the end in the accompanying drawing left side of slotted hole 62a, and valve side connecting rod 62 supports driving operations arm 61 with linkage pin 63a as reacting force part.And; If the tilling depth of the neutral operating body of 71 operations of the neutral motion arm through neutral interlinked mechanism 70 32, tillage device 20 reverts to the setting tilling depth; The operation of the balance connecting rod 35 that then carries out through driving operations body 31 and neutral operating body 32; The connecting pin 42 of balance connecting rod 35 is positioned at the neutral position, and the operating main body 33 of operating portion 30 becomes neutral condition, shut-down operation hydraulic cylinder 5.
With respect to this, like Fig. 9, shown in Figure 10, when the last lift operations of lift arm 11, operating body interlinked mechanism 80 is through the motion action of neutral interlinked mechanism 70, and driving operations body 31 is overcome rotor rear lid 50 with respect to the decline swing of rotor top lid 51 and operate.Promptly; When the last lift operations of lift arm 11; Output connecting rod 81 interlocks are swung around the lower right side of axle center in accompanying drawing of a rotation axial region 32a in neutral operating body 32, and the driving force of output connecting rod 81 is delivered to bearing connecting rod 82 via interlock rod 83 with transfer connecting rod 84.So bearing connecting rod 82 is the swing of the left side in accompanying drawing around the axle center of fulcrum 8a, around the left side swinging operation of connecting pin 63b in accompanying drawing, linkage pin 63a is connected on the left end in the accompanying drawing of slotted hole 62a with sensor side connecting rod 63.Thus, when the last lift operations of lift arm 11, operating body interlinked mechanism 80 makes neutral operating body 32 and driving operations body 31 interlocks, and driving operations body 31 is overcome rotor rear lid 50 with respect to the decline of rotor top lid 51 and operate to uplifted side.
When the last lift operations of lift arm 11; If the angle of oscillation of rotor rear lid 50 is positioned at the blind band as the benchmark angle of oscillation; The then operation through 70 pairs of neutral operating bodies 32 of neutral interlinked mechanism, with the balance of the operation of 80 pairs of driving operations bodies 31 of operating body interlinked mechanism; The connecting pin 42 of balance connecting rod 35 is got back to the neutral position, and the operating main body 33 of operating portion 30 becomes neutral condition, and hydraulic cylinder 5 stops.
Promptly; When being neutral condition with lift arm 11 step-down operations, the neutral interlinked mechanism 70 neutral operating bodies 32 of operation and with 33 recovery operations of operating portion main body, neutral interlinked mechanism 70 interlocks are in neutral operating body 32 and the output connecting rod 81 of operating operation body interlinked mechanism 80.At this moment, linkage pin 63a according to the swaying direction of output connecting rod 81 can not take place to the bulldozing operation of valve side connecting rod 62, operating body interlinked mechanism 80 is not operated driving operations body 32 to the decline side.With respect to this; When along with last lift operations lift arm 11 the neutral operating body of neutral interlinked mechanism 70 operation 32, when 33 recovery operations of operating portion main body are neutral condition; Neutral interlinked mechanism 70 interlocks are in neutral operating body 32, the output connecting rod 81 of operating operation body interlinked mechanism 80.At this moment, according to the swaying direction of exporting connecting rod 81 bulldozing operation of linkage pin 63a to valve side connecting rod 62 takes place, operating body interlinked mechanism 80 is operated driving operations body 31 to uplifted side.
Thus; Control tillage device 20 goes up and down; So that if relatively make rising displacement that tillage device 20 rises and the rate of climb and through making the unit change amount change decline displacement and the decrease speed that tillage device 20 is descended to the more shallow side of the detection tilling depth of rotor rear lid 50 through the unit change amount is changed to the darker side of the detection tilling depth of rotor rear lid 50; Then link gear S through aforesaid operations body interlinked mechanism 80 effect and in above-mentioned rising displacement and the rate of climb than the big state of above-mentioned decline displacement and decrease speed operation hydraulic pressure 20 down, and make tillage device 20 when last lift operations, receive inertia more easily during than step-down operation and promptly mobile.
Like Fig. 2, shown in Figure 3, the base portion that above-mentioned tilling depth is set bar 8 is attached on the gearbox 4 via connection shaft 4b rotation freely, tilling depth set that bar 8 is supported so that its around the axle center of above-mentioned connection shaft 4b swinging operation on the car body fore-and-aft direction.If the swinging operation tilling depth is set bar 8 like this, then above-mentioned bearing connecting rod 82 is with the axis swing operation of the sensor side connecting rod 63 around above-mentioned connecting pin 63a.So; Above-mentioned linkage pin 63b is arranged on the left end of accompanying drawing of above-mentioned slotted hole 62a and pushing acts on the valve side connecting rod 62; Through operate via the swinging operation of the driving operations arm 61 of this valve side connecting rod 62 above-mentioned driving operations body 31, or the right side of above-mentioned linkage pin 63b in the accompanying drawing of above-mentioned slotted hole 62a move the swinging operation of the driving operations arm 61 that the active force of the above-mentioned spring 44 of allowing aforesaid operations main body 33 brings, the active force of the above-mentioned spring 44 through aforesaid operations main body 33 comes the above-mentioned driving operations body 31 of swinging operation.So; Move the neutral position of the connecting pin 42 of regulating above-mentioned balance connecting rod 35; Utilization acts on tilling depth and sets the detent mechanism (not shown) of the frictional resistance on the base portion of bar 8 and tilling depth is set bar 8 remain on operating position, and the neutral position of the connecting pin 42 of above-mentioned balance connecting rod 35 is remained on the position of moving after regulating.
Thus, tilling depth is set tilling depth that bar 8 will keep the up-down control of tillage device 20 through above-mentioned link gear S to more shallow side or dark side change setting.
[other embodiment]
Also can realize the object of the invention at replacement tillage device 20 under the situation of various apparatus for work such as binding plough.Utilize the structure of motor descending operation tillage device 20 also can reach the object of the invention if adopt replacement hydraulic cylinder 5.Also can reach the object of the invention if adopt replacement rotor rear lid 50 through the structure that detects special-purpose testing agency's detection tilling depth.
Thereby, general designations such as tillage device 20 are made apparatus for work 20 over the ground, hydraulic cylinder 5 grades are called driving mechanism 5, general designations such as 50 are covered at the rotor rear done depth of implements testing agency 50.
Claims (5)
1. Operation Van possesses:
Car body is by a plurality of wheel supports;
Driving mechanism is with being attached at apparatus for work over the ground on the above-mentioned car body with respect to the car body descending operation;
Depth of implements testing agency is arranged on the above-mentioned apparatus for work over the ground, so that detect the depth of implements of above-mentioned apparatus for work over the ground;
Link gear makes the action of above-mentioned driving mechanism, so that above-mentioned testing agency links with above-mentioned driving mechanism, the detection depth of implements of above-mentioned depth of implements testing agency becomes the setting depth of implements;
It is characterized in that, constitute,
Because of the detection depth of implements of above-mentioned depth of implements testing agency to changing and a certain amount of above-mentioned apparatus for work is over the ground risen than setting the dark side of depth of implements; Because of the detection depth of implements of above-mentioned depth of implements testing agency to changing and above-mentionedly a certain amount of above-mentioned apparatus for work is over the ground descended than setting the shallow side of depth of implements; And; Under the big state of the decrease speed of the rate of climb when above-mentioned rising during than above-mentioned decline, above-mentioned link gear makes above-mentioned driving mechanism operation.
2. Operation Van as claimed in claim 1 is characterized in that,
Link gear makes above-mentioned testing agency and is arranged between the operating portion on the above-mentioned driving mechanism and links, and through transmit the displacement of testing agency via operating portion, makes above-mentioned driving mechanism action.
3. Operation Van as claimed in claim 2 is characterized in that,
Aforesaid operations portion possess the neutral condition of the driving condition that switches to the above-mentioned driving mechanism of driving operations freely and the above-mentioned driving mechanism of shut-down operation the operating portion main body, aforesaid operations portion main body handover operation is the driving operations body of above-mentioned driving condition and is the neutral operating body of above-mentioned neutral condition with aforesaid operations portion main body handover operation;
Above-mentioned link gear possesses the driving interlinked mechanism that makes above-mentioned depth of implements testing agency and above-mentioned driving operations body interlock, the neutral interlinked mechanism that makes above-mentioned driving mechanism and above-mentioned neutral operating body interlock and operating body interlinked mechanism; Said operating body interlinked mechanism makes above-mentioned driving operations body and above-mentioned neutral operating body interlock; So that when the above-mentioned apparatus for work over the ground of last lift operations, above-mentioned neutral interlinked mechanism interlock is operated above-mentioned driving operations body in above-mentioned neutral operating body.
4. Operation Van as claimed in claim 3 is characterized in that,
Aforesaid operations body interlinked mechanism possesses connecting rod and interlock with slot and is attached on the above-mentioned neutral operating body and the engaging body that engages with above-mentioned slot;
Aforesaid operations body interlinked mechanism constitutes; When the above-mentioned apparatus for work over the ground of last lift operations; Above-mentioned engaging body is connected on the end of above-mentioned slot, will pass to above-mentioned driving operations body via aforesaid operations body interlinked mechanism from the driving force of above-mentioned driving mechanism thus.
5. Operation Van as claimed in claim 4 is characterized in that,
Aforesaid operations body interlinked mechanism constitutes; When the above-mentioned apparatus for work over the ground of the operation that descends; The butt of one end of above-mentioned engaging body and above-mentioned slot is removed, made that thus the driving force from above-mentioned driving mechanism does not pass to above-mentioned driving operations body via aforesaid operations body interlinked mechanism.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007129483A JP4875538B2 (en) | 2007-05-15 | 2007-05-15 | Working machine |
| JP2007-129483 | 2007-05-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101305652A CN101305652A (en) | 2008-11-19 |
| CN101305652B true CN101305652B (en) | 2012-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100971274A Expired - Fee Related CN101305652B (en) | 2007-05-15 | 2008-05-14 | Working vehicle |
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| Country | Link |
|---|---|
| JP (1) | JP4875538B2 (en) |
| CN (1) | CN101305652B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105027717B (en) * | 2015-07-14 | 2017-01-25 | 河南科技大学 | Adjustable lifting device for mini-tiller |
| CN105993239B (en) * | 2016-07-12 | 2018-09-11 | 浙江亿森机械有限公司 | A kind of double roy-crop tractors for suppressing device of band |
| JP2018064468A (en) * | 2016-10-17 | 2018-04-26 | Ｋｙｂ株式会社 | Work machine lifting control device |
| DE102017104909A1 (en) | 2017-03-08 | 2018-09-13 | Ebner Industrieofenbau Gmbh | Bandschwebellage with a nozzle system |
| CN115506218B (en) * | 2022-10-21 | 2023-08-15 | 湖南三一中益机械有限公司 | Milling machine control method, milling machine control system and milling machine |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5689303A (en) * | 1979-12-19 | 1981-07-20 | Kawasaki Steel Corp | Rolling method for slab |
| JPS5692701A (en) * | 1979-12-26 | 1981-07-27 | Kubota Ltd | Automatic lifting control mechanism of soil treatment working device |
| JPS56111711A (en) * | 1980-02-05 | 1981-09-03 | Kazumi Yamaoka | Turbidity-preventing method for water bottom works |
| JP3238564B2 (en) * | 1994-03-10 | 2001-12-17 | 三菱農機株式会社 | Hydraulic control device for tractor |
| JP3563007B2 (en) * | 1999-12-17 | 2004-09-08 | 株式会社クボタ | Tractor lifting control |
| JP3717417B2 (en) * | 2001-03-28 | 2005-11-16 | 株式会社クボタ | Tractor lifting control device |
| JP3672515B2 (en) * | 2001-09-27 | 2005-07-20 | 株式会社クボタ | Tractor lifting control device |
| JP4033831B2 (en) * | 2003-12-18 | 2008-01-16 | 株式会社クボタ | Tractor operating device |
-
2007
- 2007-05-15 JP JP2007129483A patent/JP4875538B2/en active Active
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2008
- 2008-05-14 CN CN2008100971274A patent/CN101305652B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2008283875A (en) | 2008-11-27 |
| JP4875538B2 (en) | 2012-02-15 |
| CN101305652A (en) | 2008-11-19 |
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