CN106794787A

CN106794787A - Working truck

Info

Publication number: CN106794787A
Application number: CN201580052851.3A
Authority: CN
Inventors: 东口岳
Original assignee: Yanmar Co Ltd
Current assignee: Yanmar Co Ltd
Priority date: 2014-10-16
Filing date: 2015-10-08
Publication date: 2017-05-31
Also published as: WO2016060061A1; JP6324872B2; KR20170051500A; KR101957073B1; JP2016078610A

Abstract

A kind of working truck is provided, does not use instrument just can infinitely change the mounting position of handrail (49), improve the ride of operator, and the operability of the operating portion being configured on handrail (49) can be improved, reduce maloperation.It is configured to：Manipulation is equiped with travel machine body (2) and attends a banquet (8) to be taken for operator, and manipulation attend a banquet (8) side configure handrail (49), in such working truck, the screw structure body (342) of the setting angle for being provided with changing handrail (49), by handrail (49) so that arm supports body (331) can be supported on by way of the operation of screw structure body (342) is infinitely adjusted.

Description

Working truck

Technical field

The present invention be related to it is a kind of to the agricultural that working rig is drawn over the ground such as ploughing and weeding working rig or seeding operation machine The working truck of operation tractor.

Background technology

In the past, there are following such tractors in the tractor as working truck, i.e.,：On at least left side that manipulation is attended a banquet The upper surface of the handrail (armrest) of right any one party configuration, is intensively configured to setting/regulation travel machine body, rotary cultivator Job state multiple operating system operating mechanisms.Patent document 1 discloses an example of the tractor of above-mentioned dependency structure Son.In the tractor of patent document 1, it is configured with as operation system on the handrail manipulated on the right side of the direct of travel attended a banquet The working rig elevating lever (homework department's locating rod) of system operating mechanism, work is configured with the outside of the handrail for manipulating and attending a banquet It is the gate footstep lever (main shift lever) of driving system operating mechanism.

Patent document

Patent document 1：Japanese Unexamined Patent Publication 2008-037411 publications

The content of the invention

But, in the structure of patent document 1, the position that manipulation is attended a banquet, institute are being left in the configuration of driving system operating mechanism During with the often travel speed of secondary change working truck, it is required for making hand significantly be removed from steering wheel, its operability is not good.Separately Outward, although the configuration of operating system operating mechanism is on handrail, but the configuration of driving system operating mechanism is in the outside of handrail.Cause This, operator at least needs to be moved forwards from ancon when driving system operating mechanism is operated, and according to its operation posture, has When handrail turn into obstacle.In addition, the angular adjustment of handrail is that have level to adjust, it is necessary to instrument.Handrail is suspension support structure, firm Property ensure aspect seem cumbersome.Additionally, make driving attend a banquet horizontal rotation when, handrail rear portion can collide lateral column inner side Face, it is therefore desirable to larger gap is ensured between lateral column and handrail.

In addition, if in anterior setting main shift lever and the potentiometer of handrail, then handrail front portion cannot be formed as into compact. Handrail becomes big, will encounter the pin of operator.There is a problem of that the operating physical force of main shift lever is unstable.Additionally, also exist asking as follows Topic：When seat rotates, become inadequate with the gap between interior trim wall, hydraulic lifting scale is configured with the anterior side of handrail During disk, it is impossible to improve the operability of hydraulic lifting dial, it is impossible to reduce maloperation.

The technical task of present invention is, there is provided a kind of investigation above-mentioned present situation and to improvement after work Industry vehicle.

The working truck of present invention is to install manipulation in travel machine body to attend a banquet to be taken for operator, and In the side configuration handrail for manipulating and attending a banquet, it is configured to：Setting can change the tilt adjustment of the setting angle of the handrail Part (screw structure body), the side by the handrail can infinitely be adjusted by the operation of the tilt adjustment part Formula is supported in arm supports body.

In above-mentioned working truck, it is also possible to be configured to be linked to the handrail in the way of it can change setting angle The seat board support frame portion for manipulating the seat mount body attended a banquet and back support frame portion, by the handrail dual-gripper in institute State seat mount body.

In above-mentioned working truck, it is also possible to erect from the seat board support frame portion of the seat mount body for manipulating and attending a banquet Vertical frame body is set, and from the extended crossing frame body in back support frame portion for manipulating and attending a banquet, after the handrail Side is linked to the linking part between the vertical frame body and crossing frame body by handrail fulcrum shaft, and adjusts described inclination Side is connected to the front lower surface of the handrail to section part from below.

The working truck of present invention is to install manipulation in travel machine body to attend a banquet to be taken for operator, and In the side configuration handrail for manipulating and attending a banquet, it is also possible to be configured to：Make the lateral surface at the handrail rear portion towards with the behaviour The tangential direction of the circle centered on the vertical feathering axis attended a banquet is inclined.

In above-mentioned working truck, the medial surface of the lateral column opposed with the handrail rear portion is set to be attended a banquet towards with the manipulation Feathering axis centered on circumferencial direction bending.

In above-mentioned working truck, it is also possible to by the medial surface bending section of the lateral column opposed with the handrail rear portion and with institute The medial surface bending section for stating the anterior opposed lateral column of handrail is formed as different shapes.

The working truck of present invention is to install manipulation in travel machine body to attend a banquet to be taken for operator, and In the side configuration handrail for manipulating and attending a banquet, it is configured to：By the base end part of main shift lever rotatably by change Fast fulcrum shaft and be arranged at the anterior construction of the handrail, by interlocking chain bar, speed change sensor is linked to the main transformer speed The base end part of bar.

In above-mentioned working truck, it is also possible to make the front of gearing chain bar prominent towards front from the speed change sensor axis Go out, make the gearing chain bar horizontally extending setting in the longitudinal direction, the front of the gearing chain bar is linked to described The base end part of main shift lever.

In above-mentioned working truck, it is also possible to be configured to：The spiral of friction support is set on the speed change fulcrum shaft Spring, frictional force is suppressed by the helical spring, and the main shift lever is supported in into operating position.

The working truck of present invention is to install manipulation in travel machine body to attend a banquet to be taken for operator, and It is the construction of the homework department's position dial for possessing hydraulic lifting operation in the side configuration handrail for manipulating and attending a banquet, and Homework department's position dial is set in the handrail anterior lateral surface, homework department's position dial is formed as： The shape of side operation and the operation of upper surface button can be carried out.

In above-mentioned working truck, it is also possible to configure rotation process in the ratio of the handrail also low position of supporting surface of letting go Button or mode selector switch button.

Invention effect

According to present invention, working truck is to install manipulation in travel machine body to attend a banquet to be taken for operator, And in the side configuration handrail for manipulating and attending a banquet, it is configured to：The spiral shell of the setting angle for being provided with changing the handrail Silk tectosome, the handrail is helped with that can be supported in by way of the operation of the screw structure body is infinitely adjusted Hand supporter, so not using instrument, just can infinitely change the mounting position of the handrail, it is possible to increase the seating of operator Property, and operability of the configuration in the operating portion of the handrail can be improved, reduce maloperation.

According to present invention, because being configured to be linked to the handrail in the way of it can change setting angle： The seat board support frame portion for manipulating the seat mount body attended a banquet and back support frame portion, by the handrail dual-gripper in institute Seat mount body is stated, it is possible to that reduces the handrail by dual-gripper simple structure rocks vibration, can easily be carried The rigidity of support of the handrail high.

According to present invention, because erect from the seat board support frame portion of the seat mount body for manipulating and attending a banquet setting Vertical frame body is put, and from the extended crossing frame body in back support frame portion for manipulating and attending a banquet, by handrail fulcrum shaft The rear end side of the handrail is linked to the linking part between the vertical frame body and crossing frame body, and makes the screw structure Side is connected to the front lower surface of the handrail to body from below, it is possible to easily improving the rigidity of support of the handrail While, the setting angle of the handrail, Neng Gourong can be infinitely changed by the descending operation of the screw structure body It is to be suitable for the posture that operator experiences to change places the arm supports.

According to present invention, working truck is to install manipulation in travel machine body to attend a banquet to be taken for operator, And in the side configuration handrail for manipulating and attending a banquet, because making the lateral surface at the handrail rear portion be attended a banquet towards with the manipulation Feathering axis centered on circle tangential direction incline, so need not it is described manipulation attend a banquet side lateral column with it is described Big gap is formed between handrail, the construction for manipulating and attending a banquet with handrail installation portion can be compactly constituted, lateral column is approached It is described to manipulate side of attending a banquet such that it is able to improve the operability of the bar or Switch on the lateral column.

According to present invention, because making the medial surface of the lateral column opposed with the handrail rear portion towards with the manipulation Circumferencial direction bending centered on the feathering axis attended a banquet, even if so change to the left and right it is described manipulate the direction attended a banquet, Can avoid the collision at the handrail rear portion and lateral column, and configure lateral column upper surface with being attended a banquet close to the manipulation Bar or Switch.

According to present invention because by the medial surface bending section of the lateral column opposed with the handrail rear portion and with it is described The medial surface bending section of the anterior opposed lateral column of handrail is formed as different shapes, even if so setting anterior extension of the handrail It is set to：Easily operated main shift lever etc. it is outer towards shape, it is also possible to be easily prevented from the outer handrail towards shape anterior Collide lateral column medial surface.

According to present invention, working truck is to install manipulation in travel machine body to attend a banquet to be taken for operator, And in the side configuration handrail for manipulating and attending a banquet, it is configured to：The base end part of main shift lever is rotatably borrowed Help speed change fulcrum shaft and be arranged at the anterior construction of the handrail, by interlocking chain bar, speed change sensor is linked to the master The base end part of gear lever, it is possible to the leading section of the handrail is formed as compact, the pin for being prevented from operator is abutted to The leading section of the handrail.Because can be formed smaller by the shape of handrail, the pedal operation of operator will not be turned into Obstacle, operator being capable of cosily operation.

According to present invention, because making the front of gearing chain bar prominent towards front from the speed change sensor axis Go out, make the gearing chain bar horizontally extending setting in the longitudinal direction, the front of the gearing chain bar is linked to described The base end part of main shift lever, it is possible to compactly configuring the main shift lever and change in the space of the leading section of the handrail Fast sensor, and can easily reduce the system limit of the main shift lever and the relative position of speed change sensor.

According to present invention, because being configured to be set on the speed change fulcrum shaft spiral bullet of friction support Spring, frictional force is suppressed by the helical spring, and the main shift lever is supported in into operating position, thus for example with dish-shaped bullet Spring construction is compared, and the installation space of the helical spring is narrow and small, but can fully obtain the friction support power of the main shift lever, The operation sense of the main shift lever can be simply increased, is operated using the main shift lever of operator, can easily selected Most appropriate velocity stage is selected, so as to improve variable speed operation.

According to present invention, working truck is to install manipulation in travel machine body to attend a banquet to be taken for operator, And it is the structure of the homework department's position dial for possessing hydraulic lifting operation in the side configuration handrail for manipulating and attending a banquet Make, and homework department's position dial is set in the handrail anterior lateral surface, by homework department's position dial shape Turn into：The shape of side operation and the operation of upper surface button can be carried out, it is possible to compactly form the homework department position carving Scale setting unit, and no matter from which in side or upper surface, can simply operate the homework department position Dial, can easily improve the operability of homework department's position dial, reduce maloperation.Even if for example, manipulate sitting Seat is rotated in operation and also has no problem to the left and right, can suitably operate homework department's position dial.

According to present invention, because configuring rotary operation knob in the ratio also low position of supporting surface of letting go of the handrail Or mode selector switch button, even if so operator will be manually placed at the handrail upper surface, there will not be maloperation rotation Turn operating knob or mode selector switch button, the finger of the operator by being placed on the handrail upper surface can be appropriate Ground operation rotary operation knob or mode selector switch button.

Brief description of the drawings

Fig. 1 is the left view of tractor.

Fig. 2 is the right view of tractor.

Fig. 3 is the top view of tractor.

Fig. 4 is the left view explanatory diagram of travel machine body.

Fig. 5 is that the right side of travel machine body regards explanatory diagram.

Fig. 6 is the top view of travel machine body.

Fig. 7 is the stereogram that travel machine body is observed from left back.

Fig. 8 is the stereogram that travel machine body is observed from right back.

Fig. 9 is the amplification stereogram that travel machine body is observed from left side side.

Figure 10 is the amplification stereogram that travel machine body is observed from right side side.

Figure 11 is the stereogram that travel machine body is observed from left front.

Figure 12 is the stereogram that travel machine body is observed from right front.

Figure 13 is the skeleton schematic diagram of the power-transmission system of tractor.

Figure 14 is the hydraulic circuit diagram of tractor.

Figure 15 is the stereogram that portion of attending a banquet is manipulated from left front observation.

Figure 16 is the stereogram that armrest part is observed from left front.

Figure 17 is the explanatory diagram of Figure 16.

Figure 18 is the stereogram that portion of attending a banquet is manipulated from right back observation.

Figure 19 is the amplification explanatory diagram of Figure 18.

Figure 20 is the right view for manipulating portion of attending a banquet.

Figure 21 is the explanatory diagram of Figure 20.

Figure 22 is the stereogram that armrest part is observed from right front.

Figure 23 is the explanatory diagram of Figure 22.

Figure 24 is the left view for manipulating portion of attending a banquet.

Figure 25 is the left view of armrest part.

The explanatory diagram of Figure 26 Figure 25.

Figure 27 manipulates the vertical view explanatory diagram in portion of attending a banquet.

Specific embodiment

Below, based on accompanying drawing, the implementation method of the agricultural operation tractor after the present application materialization is illustrated.As schemed Shown in 1~Fig. 8, the travel machine body 2 of tractor 1 is by the pair of right and left front vehicle wheel 3 and identical pair of right and left as traveling portion Rear wheel 4 is supported.Pair of right and left rear wheel 4 is equivalent to behind portion.It is configured to：Anterior in travel machine body 2 carries bavin Oil turbine 5 (is only simply termed as engine) below, drives the rear wheel 4 or front vehicle wheel 3, tractor 1 to carry out by by engine 5 Forward-reverse is travelled.Engine 5 is capped by hood 6 (cover).Driver's cabin 7 is set above travel machine body 2.At this The inside of driver's cabin 7 is configured with：Manipulate the manipulation control wheel 9 that seat 8 and the steering to front vehicle wheel 3 are operated.Driving The left and right outside of room 7 is provided with for the automobile-used foot pedal 10 of operator's boarding.Being provided with the downside of the bottom of driver's cabin 7 to fire Material is supplied in the fuel tank 11 of engine 5.

Travel machine body 2 is by engine frame 14 and the disassembly ease ground with front bumper 12 and front truck axle box 13 The organism frame 15 for being fixed on the left and right at engine frame 14 rear portion is constituted.Enable the rotatably the past axle box of front axle 16 The side of left and right two of body 13 is towards protruding outside.By front axle 16, front vehicle wheel 3 is arranged on the left and right two of front truck axle box 13 Side.Have in the back hitch of organism frame 15：Before for making the appropriate speed change of rotary power from engine 5 and passing to The gearbox body 17 of four wheels 3,3,4,4 afterwards.The side below the organism frame 15 and gearbox body 17 of left and right, using spiral shell Bolt fastening is linked with：The cabinet frame 18 for looking up rectangular frame plate shape that left and right is stretched out towards outside.Fuel tank in implementation method 11 are divided into left and right 2.The fuel tank 11 of left and right is allocated and is mounted in side above the left and right extension of cabinet frame 18.By left and right Rear car axle box 19 with towards mode protruding outside be arranged on gearbox body 17 left and right lateral surface.By the back axle of left and right 20 with can be rotatably inserted into left and right rear car axle box 19 within.Rear wheel 4 is installed on speed change via back axle 20 Casing 17.The top of the rear wheel 4 of left and right is capped by the rear mudguard 21 of left and right.

At the rear portion of gearbox body 17, it is provided with a detachable manner：Working rig (is saved over the ground to make such as rotary cultivator etc. Sketch map shows) carry out the hydraulic pressure lifting mechanism 22 of lifting action.The working rig over the ground is by the lower link 23 by pair of right and left 3 point linkage mechanisms 111 that are constituted with upper connecting rod 24 and be linked to the rear portion of gearbox body 17.By PTO shaft 25 towards rear ground The trailing flank of gearbox body 17 is provided projectingly on, wherein the PTO shaft 25 is used to for PTO driving forces to pass to the operations such as rotary cultivator Machine.

In the output shaft (piston rod) of the engine 5 being provided projectingly towards rear from the trailing flank of engine 5, it is linked with Flywheel 26 (4~Fig. 6 of reference picture, Figure 10 and Figure 11).By the power transmission shaft 29 at two ends with universal joint, and will be from Driving shaft 27 that flywheel 26 is protruded towards rear and the input countershaft 28 protruded towards front from the front face side of gearbox body 17 link Get up (4~Fig. 6 of reference picture).As shown in figure 13, it is configured with gearbox body 17：Hydraulic stepless speed changing machine 500, forward-reverse Switching mechanism 501, traveling change gear mechanism 502,503,504 and trailing wheel differential gear train 506 etc..It is configured to：Hair The rotary power of motivation 5 is delivered to the main transmission input shaft of gearbox body 17 via driving shaft 27 and power transmission shaft 29 28, by hydraulic stepless speed changing machine 500 and traveling change gear mechanism by speed change, the variable-speed dynamic is by trailing wheel with differential Gear mechanism 506 and be delivered to left and right rear wheel 4.

By front truck wheel drive shaft 31, by from the direction of front truck axle box 13 for being built-in with front-wheel differential gear train 507 The front vehicle wheel transmission axle 508 that rear protrudes is linked to：The front vehicle wheel protruded towards front from the front lower of gearbox body 17 is defeated Shaft 30.It is configured to：By the hydraulic stepless speed changing machine 500 in gearbox body 17 and traveling change gear mechanism, (two drive 4 wheel driven Switching mechanism 504) variable-speed dynamic that determines is from front vehicle wheel output shaft 30, front truck wheel drive shaft 31 and front vehicle wheel transmission axle 508 And the front vehicle wheel 3 of left and right is delivered to via the front-wheel differential gear train 507 in front truck axle box 13.

Then, reference picture 3, Fig. 7 and Fig. 8 etc., illustrate the internal structure of driver's cabin 7.Manipulation seat in driver's cabin 7 8 fronts are configured with steering column 32.Steering column 32 stands up the back of the body of the instrument board 33 of the front face side configuration inside driver's cabin 7 Surface side.In the upper end side of the driving dish axle highlighted upward from the upper surface of steering column 32, vertical view is installed in substantially round The manipulation control wheel 9 of shape.

It is configured with the lower right-hand side side of steering column 32：Pair of right and left for carrying out brake operating to travel machine body 2 Brake pedal 35.It is configured with the upper side of the left side of steering column 32：For by the direct of travel of travel machine body 2 advance and The forward-reverse changer lever 36 (reversing bar) of operation is switched between retrogressing, the side configuration below the left side of steering column 32 Have：For to hydraulic stepless speed changing machine 500 output (advance low speed hydraulic clutch 537, advance high-speed hydraulic clutch 539, Retreat hydraulic clutch 541) turn off the clutch pedal 37 of operation.In addition, by the foot-operated behaviour to clutch pedal 37 Make, making operation is carried out to main control magnetic valve 635, so as to cut off the advance output of hydraulic stepless speed changing machine 500 or retreat Output (reference picture 14).

In the left side of steering column 32, and it is configured with the lower section of forward-reverse changer lever 36：Along forward-reverse changer lever 36 maloperations for extending prevent body 38 (reverse protection body).By making to prevent the maloperation of utensil from preventing body 38 than preceding as contact Enter to retreat the also outer side of changer lever 36 to protrude, can prevent：Operator carelessly contacts forward-reverse in boarding tractor 1 The problem of changer lever 36.It is provided with the upper rear portion side of instrument board 33：It is built-in with the operation display panel 39 of liquid crystal panel.

On the floor 40 in the front of the manipulation seat 8 in driver's cabin 7, and it is configured with the right side of steering column 32： The gas pedal 41 that rotary speed or speed to engine 5 etc. are controlled.In addition, the substantially overall shape of the upper surface of floor 40 As tabular surface.Across manipulation seat 8 in the lateral column 42 of its left and right sides configuration left and right.Manipulating seat 8 and left side post 42 Between be configured with：The rear wheel 4 of left and right is maintained the brake parking lever 43 of on-position, forcibly makes to draw for performing Ultra-Low Speed bar 44 ((creep) operation bar of going slowly) that the travel speed (speed) of machine 1 is greatly reduced, for switching gearbox body 17 The secondary gear lever 45 of the output area of the interior secondary change gear mechanism 503 of traveling and enter for the actuating speed to PTO shaft 25 The PTO gear levers 46 of row handover operation.It is configured with the lower section for manipulating seat 8：For the Differential Driving of the rear wheel 4 to left and right Carry out the differential mechanism locking pedal 47 of on-off.It is configured with the left rear side for manipulating seat 8：Perform and be driven reverse PTO shaft The reversion PTO bars 48 (reference picture 10) of 25 operation.

It is provided between seat 8 and right side post 42 manipulating：The operator's arm or ancon that seat 8 is manipulated for being seated at are put The handrail 49 put.Handrail 49 has：Make main shift lever 50 that the travel speed of tractor 1 increases and decreases and manually to so-called rotation The height and position of the working rig over the ground of the machine of ploughing etc. carries out (the lifting quarter of homework department's position dial 51 of the dial type for changing regulation Scale).In addition, handrail 49 is configured to：Multistage lifting rotation can be carried out using rear end lower as fulcrum.

On right side, post 42, is configured with successively from front side：Rotary speed to engine 5 set the gate footstep lever of holding 52nd, to from PTO shaft 25 towards the working rigs such as rotary cultivator transmission power engaged and opening operation PTO clutch switches 53, And for switching over operation to configuring taking-up valve 430 (Figure 14 references) outside the hydraulic pressure of the upper surface side of gearbox body 17 Multiple hydraulic operation bars 54 (SCV bars).Here, valve 430 is taken out in hydraulic pressure outside to be used to control：Installed after working oil is supplied in The hydraulic machine of the working rig of the frontloader in tractor 1 etc..In embodiments, the individual of valve is taken out corresponding to hydraulic pressure outside Count (4) and configure 4 hydraulic operation bars 54.

Additionally, as shown in Fig. 9~Figure 12 etc., having：The front support platform 96 of the left and right of support driver's cabin 7 front side and The back support platform 97 of the left and right at support driver's cabin 7 rear portion.Using bolt, the fastening of front support platform 96 is linked to：Left and right Front and rear pars intermedia among the machine lateral surface of organism frame 15；And via vibration-proof rubber body 98 by the front side bottom of driver's cabin 7 Portion can be supported in vibrationproof the upper surface side of front support platform 96, and, using bolt, back support platform 97 is fastened into link In：Left and right width pars intermedia on left and right directions among the upper surface of the rear car axle box 19 of the left and right of horizontal-extending setting；And And the bottom rear of driver's cabin 7 can be supported in vibrationproof the upper surface of back support platform 97 via vibration-proof rubber body 99 Side.That is, Diesel engine 5 and driver's cabin 7 can be supported on to vibrationproof traveling machine via multiple vibration-proof rubber bodies Body 2 (engine frame 14 and organism frame 15 and rear car axle box 19 that are integratedly concatenated).In addition, such as Fig. 4 and Fig. 5 etc. is shown, and back support platform 97 is configured with the upper surface side of rear car axle box 19, in the lower face side of rear car axle box 19 It is configured with resistance to shake bracket 101, and utilizes bolt, the fastening of bracket 101 of shaking of back support platform 97 and resistance is linked up, and will The shake both ends of the body of rod 103 of resistance for being accompanied with the screw-button for being capable of telescopic adjustment are linked to：It is extended in the longitudinal direction The pars intermedia of lower link 23 and resistance are shaken bracket 101；Left and right directions so as to prevent lower link 23 rocks vibration.

Then, 4~Fig. 8 of reference picture etc., illustrates Diesel engine 5 and the engine chamber structure below hood 6.Constitute For Diesel engine 5 is equipped with cylinder head on the cylinder body for being built-in with engine output shaft and piston, in (the gas of Diesel engine 5 Cylinder cap) right flank is configured with：The induction mnifold 203 of air cleaner 221 is connected to via turbocharger 211 and make The EGR device 210 of the part recycling of the waste gas from exhaust manifold 204, by the waste gas for being discharged to exhaust manifold 204 A part is back to induction mnifold 203 so that maximum combustion temperature reduction when high capacity is operated, so as to come from Diesel engine The discharge rate reduction of 5 NOx (nitrogen oxides).On the other hand, it is configured with Diesel engine 5 (cylinder head) left surface：Connection In the exhaust manifold 204 and turbocharger 211 of tail pipe 229.That is, in engine 5, along engine output shaft Left and right side is each configured with induction mnifold 203 and exhaust manifold 204.It is configured with cold in Diesel engine 5 (cylinder body) front face side But fan 206.

In addition, as shown in Fig. 4~Fig. 8 etc., it is also configured such as, Diesel engine 5 has：In the upper of Diesel engine 5 The waste gas purification apparatus 224 (DPF) of the continuous regenerative of surface side (top of exhaust manifold 204) configuration, in waste gas purification apparatus 224 Exhaust side be connected with tail pipe 229.By waste gas purification apparatus 224, can remove：Arranged via tail pipe 229 from engine 5 Go out to the particle-like substance (PM) in the waste gas of machine exterior, and the carbon monoxide (CO) in waste gas, hydrocarbon can also be reduced (HC)。

Additionally, as shown in Fig. 1~Fig. 3 etc., hood 6 has preceding grid 231 in underside of forward, engine room is covered 200 upper surface side and front face side.The sidepiece hood formed using porous plate is configured with the downside of the left and right of hood 6 232, it is used to cover the side of engine room 200 or so.That is, by hood 6 and hood 232, covering diesel oil hair The front of motivation 5, top and left and right.

In addition, as shown in Fig. 4~Fig. 8, rear side is provided with into the radiator 235 of fan shroud 234 with positioned at engine 5 Before the mode of side position stand up in engine frame 14.Fan shroud 234 surrounds the periphery of cooling fan 206 Side, makes radiator 235 be connected with cooling fan 206.Air filtration is configured with the top position on the preceding surface of radiator 235 Device 221.In addition, in the front face side of radiator 235, in addition to above-mentioned central cooler, being additionally provided with：Oil cooler, combustion Oil cooler etc..

On the other hand, as shown in Fig. 9~Figure 12 etc., the organism frame 15 of pair of right and left passes through the support quilt of beam framework 236 Link up.Support beam framework 236 is fastened with the organism frame 15 of left and right and linked respectively using bolt, and is erected at a left side The leading section (side behind engine 5) of right organism frame 15, by the rear engine pin body 237 with vibration-proof rubber, will The back hitch of Diesel engine 5 is in the support upper surface of beam framework 236.In addition, as shown in Figure 1, Figure 2, Fig. 4, Fig. 5, Figure 11 and Shown in Figure 12, by the anterior engine foot body 238 of the left and right with vibration-proof rubber, by the left and right sides of the front portion of Diesel engine 5 Face is linked to the middle part of the engine frame 14 of pair of right and left.That is, it is supported in vibrationproof the front side of Diesel engine 5 Engine frame 14, and by support beam framework 236, can make to vibrationproof the back support of Diesel engine 5 in left and right The front of a pair of organism frame 15.

Then, 4~Figure 12 of reference picture, illustrates gearbox body 17, the point linkage mechanism 111 of hydraulic pressure lifting mechanism 22 and 3 Mounting structure.The gearbox body 17 possesses：With input the grade of countershaft 28 anterior gearbox body 112, with rear car axle box The rear portion gearbox body 113 of the grade of body 19 and the front side of rear portion gearbox body 113 is set to be linked to the rear side of anterior gearbox body 112 Middle housing 114.By the upper lower body connection shaft body 115,116 of left and right, the rearward end of the organism frame 15 of left and right is linked In the left and right side of middle housing 114.That is, it is configured to：Link axis body 115 and 2 lower body connection shafts using 2 upper machine bodies Body 116, makes the rearward end of the organism frame 15 of left and right be linked to the left and right sides of middle housing 114, by the He of organism frame 15 The connect setting of gearbox body 17 is integral, so as to constitute the rear portion of travel machine body 2, and matches somebody with somebody between the organism frame 15 of left and right Anterior gearbox body 112 or power transmission shaft 29 etc. is equipped with to protect anterior gearbox body 112 etc..The rear car axle box of left and right 19 being installed on the left and right sides of rear portion gearbox body 113 towards mode protruding outside.In embodiments, by middle housing 114 and rear portion gearbox body 113 be made high rigidity casting it is made of iron, on the other hand, anterior gearbox body 112 is made light weight And the good aluminium alloy compression casting of processability.

According to above-mentioned composition, due to gearbox body 17 being configured to：Be divided into anterior gearbox body 112, middle housing 114 with And rear portion gearbox body 113 this three, therefore, it can for the parts such as axle, gear to be combined in each casing 112~114 in advance, it Assemble anterior gearbox body 112, middle housing 114 and rear portion gearbox body 113 this three afterwards.Therefore, it can it is accurate and Efficiently carry out the assembling of gearbox body 17.

Further, since the rear car axle box 19 of left and right is installed on the left and right sides of rear portion gearbox body 113, will be front portion The middle housing 114 of the high rigidity structure that gearbox body 112 and rear portion gearbox body 113 are coupled together is linked to composition traveling machine The organism frame 15 of the left and right of body 2, thus, for example, can be installed on by middle housing 114 and rear portion gearbox body 113 In the state of organism frame 15, anterior gearbox body 112 is only unloaded, it is possible to perform：Inside it is provided with hydraulic stepless speed changing machine 500 Deng anterior gearbox body 112 inside axle or gear exchange etc. maintaining or reconditioning work.Therefore, it can significantly Reduce by the overall frequency that the apportioned effort for getting off is disassembled (unload) from tractor 1 of gearbox body 17, such that it is able to realize：Improve Workability during maintaining or when repairing.

Further, since middle housing 114 and rear portion gearbox body 113 are made cast made of iron, on the other hand, by front portion Gearbox body 112 is made aluminium alloy compression casting, therefore, it can be linked to organism frame 15 middle housing 114 and, link The rear portion gearbox body 113 for having the rear car axle box 19 of left and right is configured to：High rigidity ground constitutes the strength member of travel machine body 2. On this basis, can cause be not strength member anterior gearbox body 112 present lightweight.Therefore, it can substantially ensure that The rigidity of travel machine body 2, and realize as the lightweight of the entirety of gearbox body 17.

In addition, as shown in Fig. 4~Figure 12, hydraulic pressure lifting mechanism 22 has：The hoist cylinder 117 of left and right, its utilization The operation of the grade of homework department's position dial 51 carries out action control；The lift arm 120 of left and right, it is by lifting fulcrum shaft 119 And enable base end side rotate the earth's axis be supported in can be opened and closed above lid 118, and the lid above 118 is arranged on gearbox The top side of rear portion gearbox body 113 among body 17；And the lifting arm 121 of left and right, it is linked to the lift arm 120 of left and right The lower link 23 of left and right.It is configured to：Using hydraulic control with horizontal cylinder 122 form the part of right lifting arm 121, utilize Horizontal cylinder 122, can adjust the telescopic of right lifting arm 121.

In addition, as shown in Fig. 7, Fig. 8 and Figure 10 etc., upper connecting rod hinge 123 to be fixedly installed in the back of the body of lid 118 above Surface side, by joint pin, upper connecting rod hinge 123 is linked to by upper connecting rod 24.It is configured to：Working rig will be supported in and connect over the ground In the state of the lower link 23 of bar 24 and left and right, the piston of horizontal cylinder 122 is stretched, change the feelings of the length of right lifting arm 121 Under condition, the angle that tilts of the working rig over the ground changes.

Then, 13~Figure 24 of reference picture, illustrates the internal structure of gearbox body 17 and the power conveying system of tractor 1 System.Gearbox body 17 possesses：Anterior gearbox body 112 with the grade of main transmission input shaft 28, with rear car axle box 19 etc. Rear portion gearbox body 113 and the front side of rear portion gearbox body 113 is linked to anterior gearbox body 112 rear side centre Casing 114.Gearbox body 17 is integrally formed into hollow box.

Preceding surface configuration on the preceding surface of gearbox body 17 that is, anterior gearbox body 112 has front cover member 491.Protecgulum Part 491 can removably fasten the preceding surface for being linked to anterior gearbox body 112 using multiple bolts.In gearbox body 17 The rear surface configuration of surface that is, rear portion gearbox body 113 has back cover part 492 afterwards.Back cover part 492 is using multiple bolt energy Enough removably fastenings are linked to the rear surface of rear portion gearbox body.Front-surface side in middle housing 114, is integrally formed： Anterior gearbox body 112 and the wall spaced intermediate 493 spaced apart of middle housing 114.Before and after rear portion gearbox body 113 Middle part, is integrally formed：Front and rear rear portion spaced walls 494 will be separated into rear portion gearbox body 113.

Therefore, cup is formed by wall spaced intermediate 493 and rear portion spaced walls 494 inside gearbox body 17 495th, rear chamber 496 and these three rooms of medial compartment 497.Front cover member 491 and wall spaced intermediate among the inside of gearbox body 17 Space (inside anterior gearbox body 112) between 493 turns into cup 495.Between back cover part 492 and rear portion spaced walls 494 The space inside of rear side (rear portion gearbox body 113) turn into rear chamber 496.Between wall spaced intermediate 493 and rear portion spaced walls 494 Space (inside of middle housing 114 and the front side of rear portion gearbox body 113) turn into medial compartment 497.In addition, cup 495, centre Room 497 and rear chamber 496 are connected by cutting off a part for each spaced walls 493,494, to cause in each room 495~497 Working oil (lubricating oil) can mutually flow.

It is configured with (in anterior gearbox body 112) in the cup 495 of gearbox body 17：It is hydraulic stepless speed changing machine 500, right The mechanical change-speed gearing of going slowly of speed change is carried out via the rotary power after the forward-reverse switching mechanism 501 being discussed below Mechanism 502 and the secondary change gear mechanism 503 of traveling and two drives four switched over to two drives of front and back wheel 3,4 and 4 wheel driven Drive switching mechanism 504.It is (interior on front side of middle housing 114 and rear portion gearbox body 113 in the medial compartment 497 of gearbox body 17 Portion) it is configured with：Rotary power from hydraulic stepless speed changing machine 500 is switched to the forward-reverse switching in forward or reverse direction Mechanism 501.It is configured with：Rotary power from engine 5 is carried out into appropriate speed change and the PTO variable-speed motors of PTO shaft 25 are passed to Structure 505 and will be transmitted via the rotary power after go slowly change gear mechanism 502 or the secondary change gear mechanism 503 of traveling To the trailing wheel differential gear train 506 of the rear wheel 4 of left and right.Go slowly change gear mechanism 502 and the secondary change-speed gearing of traveling Mechanism 503 equivalent to：The traveling gear teeth turbine of multi-change speed will be carried out via the output of the speed change of forward-reverse switching mechanism 501 Structure.At rear portion, the left outside portion in front of gearbox body 113 is provided with：Receive what is be driven using the rotary power of engine 5 Working rig hydraulic pump 481 and the pump case 480 of traveling hydraulic pump 482.

As shown in Fig. 4~Fig. 6, in the output shaft of the engine 5 being provided projectingly towards rear from the trailing flank of engine 5 Flywheel 26 is linked with (crank axle).By the power transmission shaft 29 at two ends with universal joint, will be from before gearbox body 17 Surface (front cover member 491) side is linked to towards the main transmission input shaft 28 that front highlights：It is prominent towards rear from flywheel 26 The driving shaft 27 for going out out.The rotary power of engine 5 is delivered to speed change via driving shaft 27 and power transmission shaft 29 The main transmission input shaft 28 of casing 17 (anterior gearbox body 112), and by hydraulic stepless speed changing machine 500 and change-speed gearing of going slowly Mechanism 502 travels secondary change gear mechanism 503 and by speed change, afterwards, is delivered to trailing wheel differential gear train 506, comes Drive the rear wheel 4 of left and right.Via go slowly change gear mechanism 502 or the secondary change gear mechanism 503 of traveling variable-speed dynamic from Two drive 4 wheel driven switching mechanisms 504 are passed via front vehicle wheel output shaft 30, front truck wheel drive shaft 31 and front vehicle wheel transmission axle 508 Pass the front vehicle wheel 3 that the front-wheel in front truck axle box 13 drives left and right with differential gear train 507.

The main transmission input shaft 28 highlighted towards front from front cover member 491 is from the leap of anterior gearbox body 112 Between casing 114 (from cup 495 to medial compartment 497) and extend in the longitudinal direction.The front and rear middle part of main transmission input shaft 28 Wall spaced intermediate 493 rotatably can be supported in by axle.The rear end side of main transmission input shaft 28 rotatably can be supported in by axle Middle reinforcing plate 498, wherein, the middle reinforcing plate 498 can removably fasten the front face side for being linked to rear portion spaced walls 494 (side of medial compartment 497).Middle reinforcing plate 498 and rear portion spaced walls 494 are configured to：Before both have been vacated between 498 and 494 Gap in rear direction.From anterior gearbox body 112 across middle housing 114 (crossing over medial compartment 497 from cup 495), will be by The input transmission axle 511 for carrying out power from the transmission of main transmission input shaft 28 is configured to and the parallel shape of main transmission input shaft 28.By defeated Enter transmission axle 511, hydraulic stepless speed changing machine 500 is configured in anterior gearbox body 112 (in cup 495).Hydraulic stepless becomes The toe lateral of fast machine 500 is arranged on：Can dismount before mode blocked to the front openings portion of anterior gearbox body 112 The inner face side of cover 491.Be input into transmission axle 511 rear end side can rotatably by axle be supported in middle reinforcing plate 498 and after Portion's spaced walls 494.

Hydraulic stepless speed changing machine 500 in cup 495 is：It is in concentrically to be configured at by main transformer speed output shaft 512 It is input into a row tandem type of transmission axle 511.Position in the medial compartment 497 being input among transmission axle 511, is embedded with outward cylindrical shape Main transformer speed output shaft 512.Main transformer speed output shaft 512 front insertion wall 493 spaced intermediate and can rotatably by axle branch Support in wall spaced intermediate 493.The rear end side of main transformer speed output shaft 512 rotatably can be supported in middle reinforcing plate 498 by axle.Cause This, the input side that is, this side of rear end side for being input into transmission axle 511 are also rearward protruded than the rear end of main transformer speed output shaft 512. In the side of the rear end side (between middle reinforcing plate 498 and rear portion spaced walls 494) that can not rotate against of main transmission input shaft 28 Main transformer speed input gear 513 is embedded with outside formula.In rear end side (middle reinforcing plate 498 and the rear portion spaced walls of input transmission axle 511 Between 494) it is installed with：The input Transmission gear 514 for always being engaged with main transformer speed input gear 513.Therefore, main transformer speed is defeated The rotary power for entering axle 28 is passed via main transformer speed input gear 513, input Transmission gear 514 and input transmission axle 511 Pass hydraulic stepless speed changing machine 500.On main transformer speed output shaft 512, used as traveling output, in the way of it can not rotate against It is embedded with outward：Main transformer speed high gear 516, main transformer speed counter gear 517 and main transformer speed low-speed gear 515.

Hydraulic stepless speed changing machine 500 has：The hydraulic pressure pumping section 521 of variable capacity shape and by from the hydraulic pressure pumping section 521 The working oil of the high pressure of discharge and the hydraulic motor portion 522 of constant volume formula that is acted.It is provided with hydraulic pressure pumping section 521： Axis relative to input transmission axle 511 can change the pump swash plate 523 that adjustment work oil supply amount is carried out at inclination angle.In pump swash plate It is linked with linkage on 523：The master at the inclination angle of axis of the regulation pump swash plate 523 relative to input transmission axle 511 can be changed Speed-changing hydraulic cylinder 524.In embodiments, main speed-changing hydraulic cylinder 524 is assembled in the front portion of support hydraulic pressure stepless speed changer 500 The inner side of front cover member 491, blocking is realized using front cover member 491 and hydraulic stepless speed changing machine 500 as a part.Profit Change the inclination angle of pump swash plate 523 with the driving of main speed-changing hydraulic cylinder 524, so as to change regulation be supplied from hydraulic pressure pumping section 521 To the work oil mass in hydraulic motor portion 522, the main gear shifting operation of hydraulic stepless speed changing machine 500 is carried out.

That is, once main speed-changing hydraulic cylinder 524 is driven in direct ratioly with the operational ton of main shift lever 50, therewith concomitantly Change the inclination angle of axis of the pump swash plate 523 relative to input transmission axle 511.The pump swash plate 523 of implementation method can be in centre Clip angle of inclination essentially a zero (comprising before and after zero) neutral angle and one side (rotating forward) maximum tilt angle And the scope between the maximum tilt angle of the opposing party's (reversion) carries out angular adjustment, furthermore, it is possible in the car of travel machine body 2 When speed is minimum, the swash plate angle of inclination near the maximum of reversion is set in, as halted state, on the other hand, in travel machine body 2 Speed when being middling speed, be set in swash plate angle it is essentially a zero near angle of inclination, and travel machine body 2 speed for most Gao Shi, is set in the swash plate angle of inclination near the maximum of rotating forward.In addition, the speed in travel machine body 2 is (reversion near minimum Maximum near swash plate angle of inclination) when, can easily be ensured that the starting power of travel machine body 2 or run at a low speed power.

When the inclination angle of pump swash plate 523 essentially a zero (neutral angle), in hydraulic pressure pumping section 521, hydraulic motor portion 522 is not Driven, main transformer speed output shaft 512 is rotated with the rotary speed roughly the same with input transmission axle 511.Make pump swash plate 523 Relative to primary input transmission axle 511 axis and towards a direction (positive inclination angle) roll oblique when, hydraulic pressure pumping section 521 makes hydraulic pressure Motor part 522 carries out speedup action, and main transformer speed output shaft 512 is rotated with than the input faster rotary speed of transmission axle 511. Therefore, the rotary speed of input transmission axle 511 is delivered to main transformer speed defeated afterwards plus the rotary speed in hydraulic motor portion 522 Shaft 51.As a result, can be in the scope of the rotary speed higher than being input into the rotary speed of transmission axle 511, with pump swash plate 523 Inclination angle (positive inclination angle) proportionally change from main transformer speed output shaft 512 variable-speed dynamic (speed).When pump swash plate 523 for just and when being the angle of inclination near maximum, travel machine body 2 is max. speed.

Rolled towards other direction (negative inclination angle) relative to the axis of input transmission axle 511 when pump swash plate 523 is made Tiltedly when, hydraulic pressure pumping section 521 make hydraulic motor portion 522 slowed down (reversion) act, main transformer speed output shaft 512 with than input transmission The lower rotary speed rotation of axle 511.Therefore, the rotation in hydraulic motor portion 522 is subtracted from the rotary speed of input transmission axle 511 Speed, is delivered to main transformer speed output shaft 512 afterwards.As a result, can be in the rotation lower than being input into the rotary speed of transmission axle 511 The scope of rotary speed, changes from main transformer speed output shaft 512 in direct ratioly with the inclination angle (negative inclination angle) of pump swash plate 523 Variable-speed dynamic.When pump swash plate 523 is negative and when being the angle of inclination near maximum, travel machine body 2 is minimum speed.

In addition, by pump driver gear 484 in the way of it can not rotate against outside be embedded in：Working rig is used and traveling liquid The pump drive shaft 483 that both press pumps 481,482 are driven.Pump driver gear 484 is by horizontal gear mechanism 485 can transmit The mode of power links the main transformer speed input gear 513 of main transmission input shaft 28.In addition, middle reinforcing plate 498 and rear portion every Open and be configured between wall 494：The working oil of lubrication is supplied in hydraulic stepless speed changing machine 500 and forward-reverse switching mechanism The grease pump 518 of 501 grades.Be fixedly installed in grease pump 518 pump shaft 519 pump gear 520 always with input transmission axle 511 input Transmission gear 514 is engaged.Therefore, working rig is used and traveling uses hydraulic pump 481,482 and grease pump 518 logical Cross the rotary power of engine 5 and driven.

Then, the switching construction for moving forward and backward performed by forward-reverse switching mechanism 501 is illustrated.In main transformer speed Position (rear portion side of main transmission input shaft 28) in medial compartment 497 among input shaft 28 is configured with：As advance high speed tooth Take turns mechanism planetary gears 526 and as advance low speed gearing low-speed gear to 525.Planetary gears 526 have：Integratedly rotated with the input side travelling gear 529 that can rotate the earth's axis and be supported in main transmission input shaft 28 Central gear 531, the support 532, Yi Ji that multiple planetary gears 533 can rotatably be carried out with axle support in same radius Inner peripheral surface has the ring gear 534 of internal tooth.Central gear 531 and ring gear 534 rotatably outer can be embedded in main transformer speed Input shaft 28.Support 532 in the way of it can not rotate against outside be embedded in main transformer speed input shaft 28.Central gear 531 is from radius Engaged with each planetary gear 533 of support 532 side.In addition, the internal tooth of ring gear 534 from radius outside and each planetary gear 533 engagements.The outlet side travelling gear 530 integratedly rotated with ring gear 534 also rotatably can be supported in main transformer by axle Fast input shaft 28.The input side low-speed gear 527 and outlet side low-speed gear 528 that low-speed gear is constituted to 525 are into a single integrated structure, Can rotatably by axle be supported in planetary gears 526 among main transmission input shaft 28 and main transformer speed input gear 513 it Between.

(inside of middle housing 114 and the front side of the rear portion gearbox body 113) configuration in the medial compartment 497 of gearbox body 17 Have：With main transmission input shaft 28, input transmission axle 511 and rotating shaft 535 in the main transformer speed traveling that extends parallel to of output shaft 512, And travel transmission axle 536.The front of rotating shaft 535 rotatably can be supported in wall spaced intermediate 493 by axle in traveling.Traveling The rear end side of middle rotating shaft 535 rotatably can be supported in middle reinforcing plate 498 by axle.The front of travel transmission axle 536 can Wall spaced intermediate 493 is rotatably supported in by axle.The rear end side of travel transmission axle 536 rotatably can be supported in middle adding by axle Strong plate 498.

Forward-reverse switching mechanism 501 is arranged on rotating shaft 535 in traveling.That is, it is outer in rotating shaft 535 under steam to be embedded with： The advance high gear 540 that is concatenated using the advance high-speed hydraulic clutch 539 of wet multi-plate type, using wet multi-plate type Retreat backward gear 542 and the advance low speed hydraulic clutch using wet multi-plate type that hydraulic clutch 541 is concatenated The 537 advance low-speed gears 538 being concatenated.Under steam the advance high-speed hydraulic clutch 539 among rotating shaft 535 and retreat tooth Wheel 542 between, in the way of it can not rotate against outside be embedded with traveling in rotating disk 543.On traveling power transmission shaft 536, with can not It is embedded with outside the mode for rotating against：The travel transmission gear 544 always engaged with rotating disk in traveling 543.Main transformer speed output shaft 512 main transformer speed low-speed gear 515 always with the low-speed gear in the side of main transmission input shaft 28 to 525 input side low speed tooth Wheel 527 is engaged, and outlet side low-speed gear 528 is always engaged with advance low-speed gear 538.The main transformer speed of main transformer speed output shaft 512 Input side travelling gear 529 of the high gear 516 always with the planetary gears 526 in the side of main transmission input shaft 28 is nibbled Close, outlet side travelling gear 530 is always engaged with advance high gear 540.The main transformer speed counter gear of main transformer speed output shaft 512 517 always engage with backward gear 542.

Once forward-reverse changer lever 36 is operated into advance side, then advance low speed hydraulic clutch 537 or high speed of advancing Hydraulic clutch 539 turns into power connector state, advance low-speed gear 538 or advance high gear 540 and rotating shaft 535 in traveling It is concatenated in the way of it can not rotate against.As a result, the rotary power of advance low speed or advance high speed is defeated from main transformer speed Shaft 512 is delivered to rotating shaft 535 in traveling to 525 or planetary gears 526 via low-speed gear, and power is from row Sail middle rotating shaft 535 and be delivered to travel transmission axle 536.Once forward-reverse changer lever 36 is operated into retrogressing side, then retreat Hydraulic clutch 541 turns into power connector state, and backward gear 542 is with rotating shaft 535 in traveling in the way of it can not rotate against It is concatenated.As a result, retreat rotary power from main transformer speed output shaft 512 via low-speed gear to 525 or planetary gear Mechanism 526 and be delivered to traveling in rotating shaft 535, and power from traveling rotating shaft 535 again be delivered to travel transmission axle 536。

In addition, being operated by the advance side of forward-reverse changer lever 36, advance low speed hydraulic clutch 537 and advance are high Which of speed hydraulic clutch 539 turn into power connector state, and being the operational ton according to main shift lever 50 determines.Separately Outward, when forward-reverse changer lever 36 is in neutral position, all of hydraulic clutch 537,539,541 is in power disconnection State, the traveling driving force from main transformer speed output shaft 512 is essentially a zero (state that main clutch disconnects).

Then, illustrate by go slowly change gear mechanism 502 and the secondary speed change of traveling as traveling change gear mechanism The switching construction of gear mechanism 503 and the Ultra-Low Speed, low speed and high speed of execution.(the anterior speed change in the cup 495 of gearbox body In casing 112) it is configured with：The mechanical change of going slowly of speed change is carried out to the rotary power via forward-reverse switching mechanism 501 Fast gear mechanism 502 and the secondary change gear mechanism 503 of traveling.In this case, (the anterior gearbox body 112 in cup 495 It is interior) it is configured with：The traveling countershaft 545 extended with the coaxial of travel transmission axle 536.In addition, from anterior gearbox body 112 to rear Portion's gearbox body 113 (from cup 495 via medial compartment 497 rear chamber 496 that arrives), be configured with：Abreast prolong with traveling countershaft 545 The secondary variable-speed shaft 546 stretched.The front for travelling countershaft 545 rotatably can be supported in front cover member 491 by axle.Traveling countershaft 545 rear end side rotatably can be supported in wall spaced intermediate 493 by axle.The front of secondary variable-speed shaft 546 can rotatably by Axle is supported in front cover member 491.The front and rear middle part of secondary variable-speed shaft 546 rotatably can be supported in wall spaced intermediate 493 by axle. The rear end side of secondary variable-speed shaft 546 rotatably can be supported in middle reinforcing plate 498 and rear portion spaced walls 494 by axle.

Transmission gear 547 is provided with the rear portion side of traveling countershaft 545 and gear 548 of going slowly.Transmission gear 547 can revolve Turn to be embedded in traveling countershaft 545 outside ground, and, in the state of linking in a integrally rotatable manner with travel transmission axle 536, energy It is enough that wall spaced intermediate 493 is rotationally supported in by axle.Go slowly gear 548 in the way of it can not rotate against outside be embedded in traveling countershaft 545.Position between the Transmission gear 547 and gear 548 of going slowly among travelling countershaft 545, make to go slowly gearshift 549 with The mode spline that can not be rotated against and can slide in the axial direction is fitted together to.By accessing opening operation Ultra-Low Speed bar 44, slowly Row gearshift 549 enters line slip movement, Transmission gear 547 and gear 548 of going slowly is single is selectively linked to traveling countershaft 545.The position in cup 495 (anterior gearbox body 112) among secondary variable-speed shaft 546, rotatably outer can be embedded with deceleration Gear mesh 550.The input side reduction gearing 551 and outlet side reduction gearing 552 that reduction gearing is constituted to 550 are integrally formed knot Structure, the Transmission gear 547 for travelling countershaft 545 is always engaged with the input side reduction gearing 551 of secondary variable-speed shaft 546, gear of going slowly 548 always engage with outlet side reduction gearing 552.

The rotating disk 554 in rotating disk 553 during the toe lateral of traveling countershaft 545 is provided with low speed and high speed.Low speed transfer Gear 553 is fixedly installed in traveling countershaft 545.In at a high speed rotating disk 554 in the way of it can not rotate against outside to be embedded in traveling secondary Axle 545.Ratio reduction gearing among secondary variable-speed shaft 546 rotatably outer can be embedded with to the side in 550 also forward portions：With it is low The low-speed gear 555 of the engagement of rotating disk 553 and the high gear 556 engaged with rotating disk in high speed 554 in speed.In secondary speed change The position between low-speed gear 555 and high gear 556 among axle 546, Shi Fu gear shifts mechanism 557 is with can not relative rotation Turn and be fitted together to along the mode spline that axis direction can be slided.By operating secondary gear lever 45, secondary gear shift mechanism 557 enters Line slip is moved, low-speed gear 555 and high gear 556 is single is selectively linked to secondary variable-speed shaft 546.

In embodiments, once access operation Ultra-Low Speed bar 44 and secondary gear lever 45 is operated into low speed side, then slowly Row gear 548 is linked to traveling countershaft 545, and low-speed gear 555 to rotate against in the way of it can not rotate against Mode be linked to secondary variable-speed shaft 546, the traveling driving force of Ultra-Low Speed from travel transmission axle 536 by traveling countershaft 545 and Secondary variable-speed shaft 546 and exported towards front vehicle wheel 3 or rear wheel 4.In addition, Ultra-Low Speed bar 44 and secondary gear lever 45 are configured to：By Pin down mechanism's (omitting diagram) and carry out linkage link, with so that can not in the state of access operation is carried out to Ultra-Low Speed bar 44 Secondary gear lever 45 is operated into high-speed side.

Once opening operation Ultra-Low Speed bar 44 and secondary gear lever 45 is operated into low speed side, Transmission gear 547 is not then with The mode that can be rotated against is linked to traveling countershaft 545, and low-speed gear 555 is linked to pair in the way of it can not rotate against Variable-speed shaft 546, the traveling driving force of low speed from travel transmission axle 536 by traveling countershaft 545 and secondary variable-speed shaft 546 direction Front vehicle wheel 3 or rear wheel 4 are exported.Once opening operation Ultra-Low Speed bar 44 and secondary gear lever 45 operated into high-speed side, tooth is transmitted Wheel 547 is then linked to traveling countershaft 545, and high gear 556 to rotate against in the way of it can not rotate against Mode is linked to secondary variable-speed shaft 546, and the traveling driving force of high speed becomes from travel transmission axle 536 by traveling countershaft 545 and pair Fast axle 546 and exported towards front vehicle wheel 3 or rear wheel 4.

The rear end side insertion rear portion spaced walls 494 of secondary variable-speed shaft 546 and extend to inside rear chamber 496.In secondary variable-speed shaft 546 Rearward end be provided with little gear 558.In addition, (inside of the rear side of rear portion gearbox body 113) is configured with rear chamber 496：Will Traveling driving force passes to the trailing wheel differential gear train 506 of the rear wheel 4 of left and right.Trailing wheel differential gear train 506 has Have：The ring gear 559 for engaging of little gear 558 with secondary variable-speed shaft 546, the differential gearing casing for being arranged on ring gear 559 560 and along left and right directions extend a pair of differential output shaft 561.Differential output axle 561 is by final gear 562 Deng and be linked to back axle 20.Rear wheel 4 is installed in the front of back axle 20.

Differential output axle 561 in left and right is each configured with arrestment mechanism 563.Arrestment mechanism 563 passes through brake pedal 35 Operation and automatically control this 2 systems, to left and right rear wheel 4 apply braking.That is, each arrestment mechanism 563 is configured to： Operation is treaded in by the brake pedal 35 for either horizontal or two sides, to corresponding either horizontal or two sides Differential output axle 561 apply braking, so as to be braked to the rear wheel 4 of corresponding either horizontal or two sides.Structure Turn into：If the steering angle for manipulating control wheel 9 reaches more than predetermined angular, by rear wheel 4 for turning medial from The switching action of dynamic braking electromagnetic valve 631 (reference picture 14), checking cylinder 630 (reference picture 14) is acted, for turning medial The arrestment mechanism 563 of rear wheel 4 automatically carry out braking maneuver (so-called Braking mode action start working).Thus, draw Machine 1 can simply perform the low-angle turning driving of u-turn (the direction conversion in out of crop place in field) etc..

In addition, trailing wheel differential gear train 506 is provided with：The differential stopping of left and right rear wheel 4 is set (always to come with constant speed Drive left and right differential output axle 561) diff-lock 585.Operation is treaded in by differential mechanism locking pedal 47, When the ADB shotpin (omitting diagram) of composition diff-lock 585 is sticked in the gear of differential gearing casing 560, Differential gearing is fixed in differential gearing casing 560, and the differential function of differential gearing is stopped, the differential output axle 56 of left and right (left and right rear wheel 4) is then driven with constant speed.

Then, two drives of the front and back wheel 3,4 for being performed to driving 4 wheel driven switching mechanisms 504 by two and the switching knot of 4 wheel driven Structure is illustrated.Two drive 4 wheel driven switching mechanisms 504 are configured with the cup 495 (anterior gearbox body 112) of gearbox body.This In the case of kind, it is configured with (in anterior gearbox body 112) in cup 495：It is parallel with traveling countershaft 545 and secondary variable-speed shaft 546 Front vehicle wheel input shaft 568 and front vehicle wheel output shaft 30 that ground extends.So that being embedded in front truck outside in the way of it can not rotate against Take turns input shaft 568 driven gear 570 always with：The front of secondary variable-speed shaft 546 is embedded in outside in the way of it can not rotate against Driving gear 569 engage.Make in speed that rotating disk 572 is distributed in across driven gear 570 in rotating disk 571 and 4 wheel driven Front and rear both sides and in the way of it can not rotate against outside be embedded in front vehicle wheel input shaft 568.

Front vehicle wheel output shaft 30 is provided with two drive 4 wheel driven switching mechanisms 504.That is, using the speed liquid of wet multi-plate type The speed gear 574 that is concatenated of pressure clutch 573 and the 4 wheel driven that is concatenated of 4 wheel driven hydraulic clutch 575 using wet multi-plate type Front vehicle wheel output shaft 30 is embedded in outside gear 576.Rotating disk 571 is always exported with front vehicle wheel in the speed of front vehicle wheel input shaft 568 The speed gear 574 of axle 30 is engaged, and rotating disk 572 is engaged with four-drive gear 576 in 4 wheel driven.

Once switching switch will be driven or changer lever (omitting diagram) operation to 4 wheel driven side is driven, then 4 wheel driven hydraulic clutch 575 turn into power connector state, and front vehicle wheel output shaft 30 and four-drive gear 576 are linked up in the way of it can not rotate against. And, rotary power is delivered to front vehicle wheel from secondary variable-speed shaft 546 via front vehicle wheel input shaft 568 and four-drive gear 576 Output shaft 30, as a result, tractor 1 turns into：The powered four-wheel drive state together with rear wheel 4 of front vehicle wheel 3.In addition, one Denier carries out u-turn operation etc. to manipulation control wheel 9 and steering angle reaches more than predetermined angular, and times speed hydraulic clutch 573 is then automatic As power connector state, front vehicle wheel output shaft 30 and speed gear 574 are concatenated in the way of it can not rotate against.And And, it is defeated that rotary power is delivered to front vehicle wheel from secondary variable-speed shaft 546 via front vehicle wheel input shaft 568 and speed gear 574 Shaft 30, as a result, compared with the rotary speed of front vehicle wheel 3 determined by the rotary power via four-drive gear 576, front vehicle wheel 3 are driven with about two times of high speed.

By imparting power to the front truck wheel drive shaft 31 of front vehicle wheel 3, the past axletree casing 13 is protruded towards rear Front vehicle wheel transmission axle 508 and the front truck that is protruded towards front of the front lower from the gearbox body 17 (front cover member 491) Wheel output shaft 30 is linked up.It is configured with front truck axle box 13：Will travel driving force pass to left and right front vehicle wheel 3 before Wheel differential gear train 507.Front-wheel differential gear train 507 has：Be arranged on the front of front vehicle wheel transmission axle 508 Little gear 577 engagement ring gear 578, be arranged on the differential gearing casing 579 of ring gear 578 and along right and left To a pair of differential output shaft 580 for extending.Differential output axle 580 is linked to front axle 16 by the grade of final gear 581. Front vehicle wheel 3 is installed in the front of front axle 16.In addition, the lateral surface in front truck axle box 13 is provided with:Driven by manipulating Sail the steering operation of the disk 9, (ginseng of steering hydraulic cylinder 622 of the electronic-controlled power steering that the travel direction of front vehicle wheel 3 is changed towards left and right According to Figure 14).

Then, the switching construction to the actuating speed of the PTO shaft 25 performed by PTO gears 505 (rotates forward 3 grades And 1 grade of reversion) illustrate.(inside of the rear side of the rear portion gearbox body 113) configuration in the rear chamber 496 of gearbox body 17 Have：Power from engine 5 is passed to the PTO gears 505 of PTO shaft 25.In this case, connect by power transmission The PTO hydraulic clutches 590 that make and break is opened, the PTO input shafts 591 extended with the coaxial of main transmission input shaft 28 are linked to The rear end side of main transmission input shaft 28.PTO input shafts 591 are configured in rear chamber 496.It is configured with rear chamber 496：It is defeated with PTO Enter PTO variable-speed shafts 592, PTO countershafts 593 and PTO shaft 25 that axle 591 is extended parallel to.PTO shaft 25 is from the court of back cover part 492 Rearward protrude.Once carrying out power connector operation to PTO clutch switches 53, then PTO hydraulic clutches 590 connect as power State is connect, main transmission input shaft 28 and PTO input shafts 591 are concatenated in the way of it can not rotate against.As a result, rotation Power is transmitted from main transformer speed input 28 towards PTO input shafts 591.

In PTO input shafts 591, it is disposed with from front side：Middling speed input gear 597, low speed input gear 595, high speed Input gear 596 and reversion power shift gear 598.Middling speed input gear 597, low speed input gear 595 and high speed input tooth Wheel 596 in the way of it can not rotate against outside be embedded in PTO input shafts 591.Reversion power shift gear 598 is can not rotate against and energy Enough mode splines slided along axis direction are embedded in PTO input shafts 591.

On the other hand, the PTO intermediate gears 601 for being engaged with middling speed input gear 597 are engaged with low speed input gear 595 PTO low-speed gears 599 and the PTO high gears 600 that are engaged with high speed input gear 596 rotatably outer can be embedded in PTO Variable-speed shaft 592.Make front and rear a pair of PTO gear shifts mechanism 602,603 to rotate against and can be slided along axis direction Dynamic mode spline is embedded in PTO variable-speed shafts 592.First PTO gear shifts mechanism 602 is configured in the He of PTO intermediate gears 601 Between PTO low-speed gears 599.2nd PTO gear shifts mechanism 603 is configured in also held rearward than PTO high gear 600 Side.Front and rear a pair of PTO gear shifts mechanism 602,603 is configured to：With the operation of PTO gear levers 46 in linkage along axis Line slip movement is entered in direction.The position between PTO low-speed gears 599 and PTO high gears 600 among PTO variable-speed shafts 592 It is installed with PTO travelling gears 604.

The PTO pinions 605 that are engaged with PTO travelling gears 604 and in the way of it can not rotate against outside be embedded in PTO shaft Rotating disk 606 and PTO counter gears 607 are in the way of it can not rotate against in the PTO of 25 engagement of PTO output gears 608 It is embedded in PTO countershafts 593 outward.It is configured to：In the state of PTO gear levers 46 are operated in into neutrality, reversion PTO bars 48 are carried out anti- Turn access operation, thus, reversion power shift gear 598 enters the PTO of line slip movement, reversion power shift gear 598 and PTO countershafts 593 Counter gear 607 is meshed.

Once carrying out variable speed operation to PTO gear levers 46,602,603, front and rear a pair of PTO gear shifts mechanism is along PTO Variable-speed shaft 592 enters line slip movement, PTO low-speed gears 595, PTO intermediate gears 597 and the single choosing of PTO high gears 596 It is linked to PTO variable-speed shafts 592 with selecting.As a result, low speed~high speed each PTO speed changes output then from PTO variable-speed shafts 592 via PTO travelling gears 604 and PTO pinions 605 and be delivered to PTO countershafts 593, additionally, via rotating disk in PTO 607 with And PTO output gears 608 and be delivered to PTO shaft 25.PTO gear levers 46 and reversion PTO bars 48 are configured to：By pining down part (diagram omit) and carry out linkage link, to cause cannot in the state of beyond neutral by the variable speed operation of PTO gear levers 46 Reversion access operation is carried out to reversion PTO bars 48.

When reversion access operation is carried out to reversion PTO bars 48, reversion power shift gear 598 is nibbled with PTO counter gears 607 Close, the rotary power of PTO input shafts 591 is passed to PTO pairs via reversion power shift gear 598 and PTO counter gears 607 Axle 593.Next, the PTO speed changes of reversion are exported from PTO countershafts 593 via rotating disk in PTO 607 and PTO output gears 608 and be passed to PTO shaft 25.

In addition, in rear portion gearbox body 113, from medial compartment 497 to rear chamber 496, being configured with parallel with secondary variable-speed shaft 546 The speed synchronizing shaft 564 front and rear more long that ground extends.Speed synchronization input gear 565 in the way of it can not rotate against outside be embedded in The front of speed synchronizing shaft 564.Speed synchronization input gear 565 always with：Pair is embedded in outside in the way of it can not rotate against The power difference gear 566 of the position in medial compartment 497 among variable-speed shaft 546 is engaged.It is fixedly installed in speed synchronizing shaft 564 Rearward end speed synchronization in rotating disk 609 always with：Can rotatably it is outer be embedded among PTO shaft 25 than PTO output gear The speed synchronism output gear 610 for taking turns 608 also forward portion sides is engaged.Speed synchronism output gear 610 among PTO shaft 25 And the position between PTO output gears 608, make speed synchronization gearshift 611 can not rotate against and can be along axis The mode spline that direction is slided is fitted together to.Access operation, the same step gear shifting of speed are carried out by PTO speeds synchronizing bar (omitting diagram) Line slip movement is entered by mechanism 611, and speed synchronism output gear 610 is linked to PTO shaft 25.As a result, being passed through from secondary variable-speed shaft 546 PTO shaft 25 is delivered to by the speed synchronism output of speed synchronizing shaft 564.

Then, reference picture 14, illustrate the structure of hydraulic circuit 620 of tractor 1.The hydraulic circuit 620 of tractor 1 has： Powered working rig hydraulic pump 481 and traveling hydraulic pump 482 by the rotary power of engine 5.In embodiment party In formula, gearbox body 17 is used as operation fuel tank, the working oil in gearbox body 17 be supplied in working rig hydraulic pump 481 with And traveling hydraulic pump 482.Traveling hydraulic pump 482 is connected to by manipulating by the control valve system 621 of electronic-controlled power steering The steering hydraulic cylinder 622 of the electronic-controlled power steering that control wheel 9 determines, and be also attached to the hydraulic pressure of hydraulic stepless speed changing machine 500 The closed loop oil circuit 623 that pump 521 and hydraulic motor 522 are coupled together.In the driving of engine 5, from traveling hydraulic pump 482 working oil is always added closed loop oil circuit 623.

In addition, traveling hydraulic pump 482 is connected to following each valves：For the main compensator pressure of hydraulic stepless speed changing machine 500 Cylinder 524 main transformer speed hydraulic switching valve 624, the speed hydraulic switching valve 625 for speed hydraulic clutch 573 again, for 4 wheel driven The 4 wheel driven hydraulic switching valve 626 of hydraulic clutch 575, the PTO clutch solenoid valves 627 for PTO hydraulic clutches 590, with And the switching valve 628 acted according to PTO clutch solenoid valves 627.

Additionally, traveling hydraulic pump 482 is connected to following each valves：Order about the checking cylinder 630 of pair of right and left Braking mode The left and right Braking mode magnetic valve 631 as switching valve that acts respectively, order about before advance low speed hydraulic clutch 537 acts Enter low-speed clutch magnetic valve 632, order about advance high-speed hydraulic clutch 539 action advance high-speed clutch magnetic valve 633, Order about the back clutch magnetic valve 634 of the retrogressing action of hydraulic clutch 541 and to being supplied towards each clutch solenoid valve To the main control magnetic valve 635 that working oil is controlled.

Working rig hydraulic pump 481 is connected to following each valves：In the hydraulic pressure of the upper surface rear portion side in gearbox body 17 Multiple hydraulic pressure outside of the upper surface laminated configuration of formula elevating mechanism 22 takes out valve 430, direction is used to adjust left and right rear wheel 4 Between wheelspan (car tyre tread) left and right wheels away from the regulation supply left and right wheels that are controlled of working oil of hydraulic cylinder 645 away from regulation Magnetic valve 646, the inclination control electromagnetism to being controlled towards the supply working oil of horizontal cylinder 122 for being arranged on right lifting arm 121 Valve 647, the rising hydraulic pressure switching to being controlled towards the supply working oil of hoist cylinder 117 in hydraulic pressure lifting mechanism 22 Valve 648 and decline hydraulic switching valve 649, order about rise hydraulic switching valve 648 switch over action rising control magnetic valve 650 and order about decline hydraulic switching valve 649 action decline control magnetic valve 651.

Raise left and right two trailing wheels 4 and make its from ground it is hanging in the state of, once to left and right wheelspan electromagnetic valve for adjusting 646 switch over driving, and the wheelspan regulation hydraulic cylinder 645 of left and right then carries out expanding-contracting action, the rear car axle box 19 of left and right is existed Expanding-contracting action (reference picture 6, Figure 14) is carried out on left and right directions.As a result, can cause that the wheelspan between left and right rear wheel 4 is elongated Or shorten.Once switching over driving to inclination control magnetic valve 647, horizontal cylinder 122 then carries out expanding-contracting action, under right side Connecting rod 23 is moved up and down by fulcrum of the lower link pin in toe lateral.As a result, by left and right two lower links 23, over the ground Working rig changes relative to the inclination movement to the left and right of travel machine body 2, the over the ground angle that tilts of working rig.By upper Rising control magnetic valve makes rising hydraulic switching valve switch over action, or is switched to declining hydraulic pressure by declining control magnetic valve When valve switches over action, hoist cylinder 117 carries out expanding-contracting action, and lift arm 120 and two lower links 23 of left and right enter together Row is moved up and down.As a result, working rig carries out lifting moving over the ground, so that the adjustable height position of working rig becomes over the ground Change.

In addition to foregoing working rig is with hydraulic pump 481 and traveling hydraulic pump 482, the hydraulic pressure of tractor 1 Loop 620 also has the grease pump 518 being driven using the rotary power of engine 5.Grease pump 518 is connected to：Will Working oil (lubricating oil) is supplied in the PTO clutch hydraulic pressures switching valve 641 in the lubrication portion of PTO hydraulic clutches 590, by working oil It is supplied in lubrication portion and the advance low speed hydraulic clutch of the input transmission axle 511 that axle support is carried out to hydraulic stepless speed changing machine 500 The advance low-speed clutch hydraulic switching valve 642 in the lubrication portion of device 537, working oil is supplied in advance high-speed hydraulic clutch The advance high-speed clutch hydraulic switching valve 643 in 539 lubrication portion and by working oil be supplied in retrogressing hydraulic clutch 541 Lubrication portion back clutch hydraulic switching valve 644.In addition, hydraulic circuit 620 has：Hydraulic regulating valve or Flow-rate adjustment Valve, check valve, oil cooler, oil strainer etc..

Next, 15~Figure 26 of reference picture, illustrates the detailed configuration of handrail 49.Use is provided with 8 right side of attending a banquet is manipulated In for be seated at manipulate attend a banquet 8 operator forearm and the handrail 49 shelved of ancon.Handrail 49 and manipulation are attended a banquet 8 split structures Into.As shown in Fig. 3, Figure 16, Figure 27 etc., will manipulate and attend a banquet 8 can rotate in the horizontal direction by feathering axis 325 Mode is installed on the seat floor 324 of driver's cabin 7.Make the lateral surface at the rear portion of above-mentioned handrail 49 towards with manipulate attend a banquet 8 level The tangential direction of the circle centered on rotary shaft 325 is inclined, make the medial surface of the right side post 42 opposed with the rear portion of handrail 49 towards with Manipulation attend a banquet 8 feathering axis 325 centered on circumferencial direction bending.After the right side post 42 opposed with the rear portion of handrail 49 The front inner face bending section 42b of portion medial surface bending section 42a and the right side post 42 opposed from the front portion of handrail 49 is formed as different Shape.

Possess：Driving system operating mechanism that is, main shift lever 50, operating system operating mechanism (lifting dial) that is, Homework department's position dial 51.Main shift lever 50 as main transformer speed operating body is arranged to：Can be by tilting forward and back movement Operation carries out main variable speed operation.And, in the present embodiment, when to main shift lever 50 lean forward operation, travel machine body 2 Speed increase, on the other hand, main shift lever 50 is carried out hypsokinesis operate when, travel machine body 2 speed reduction.Seeding location It is to change the dial type of the height and position of the working rig of regulation rotary cultivator etc. for manually to put dial 51.

As shown in Figure 15, Figure 16, Figure 24 etc., the manipulation is attended a banquet and 8 is had：For operator fall seat seat board portion 8a, for behaviour The back-rest 8b of author's back-resting.Installing attend a banquet 8 seat mount body 321 of above-mentioned manipulation has：The seat of mounting seat board portion 8a Plate support frame portion 322, the back support frame portion 323 of the left and right of support back-rest 8b.Seat board support frame portion 322 is with can The mode rotated around the longitudinal axis is linked to the seat floor 324 of the bottom of driver's cabin 7 by feathering axis 325.The backrest of left and right The lower end side of support frame portion 323 is fixedly welded on the rear portion left and right sides of seat board support frame portion 322, the back support of left and right Erect the rear portion left and right sides for being arranged on seat board support frame portion 322 in frame portion 323.Being configured to that above-mentioned manipulation attends a banquet 8 can be with level Change direction towards left and right centered on rotary shaft 325.

As shown in Figure 16, Figure 18, Figure 19, Figure 22, Figure 23 etc., erect from the rear right of seat board support frame portion 322 and set Vertical frame body 327 is put, crossing frame body 328 is extended from back support frame portion 323, by 2 Hes of forward-backward adjustment bolts 329 Elongated hole 330, will be fixedly secured in the middle of the front and rear width of movable frame body 331 vertical frame body 327 and crossing frame body 328 it Between linking part among the side of vertical frame body 327.The movable frame of Support Position can be adjusted in fore-and-aft direction movement The rear end side of support body 331 sets handrail fulcrum shaft 334, and one of the handrail 49 is formed by handrails framework body 332 Point, the upper end side of fulcrum shaft frame body 333 is fastened and fixed to the rear end side of handrails framework body 332, by movable frame body 331 rear end side and the lower end side of fulcrum shaft frame body 333 by way of being rotated handrail fulcrum shaft 334 linking up. Handrail 49 is configured to：Can independently of manipulate attend a banquet 8 slidingly back and forth in direct of travel (fore-and-aft direction) nothing of travel machine body 2 Level ground adjusting position (can slide anteroposterior).

In addition, possessing nut body 341 as the screw structure body of the setting angle that can change the handrail 49 and inclining Oblique regulating bolt 342.Nut body 341 is weldingly fixed on the front of movable frame body 331, from top by tilt adjustment The lower end side of bolt 342 is screwed into nut body 341, and the upper end side head of tilt adjustment bolt 342 is set into height can change, The upper end side head of tilt adjustment bolt 342 is set to abut to the front lower surface of handrails framework body 332 from below.It is configured to： Operated by the lifting moving of tilt adjustment bolt 342, the front portion of handrail 49 is carried out lifting moving around handrail fulcrum shaft 334, By handrail fulcrum shaft 334 and tilt adjustment bolt 342, the setting angle (tilting forward and back angle) of handrail 49 can be changed.Help The rear portion of hand 49 is pivotally mounted in the way of (upper and lower) rotation that can rise and fall attends a banquet 8 in manipulation so that the front portion of handrail 49 can Infinitely lifting is rotated.Using the above-mentioned rotation that can rise and fall construction when, can according to be seated at manipulate attend a banquet 8 operation Physique, the work posture of person and the front and rear Support Position or the upper surface of handrail 49 that infinitely adjust handrail 49 tilts forward and back appearance Gesture, it is possible to reliably supporting the forearm of operator or can be set as avoiding encountering knee.Behaviour can be effectively reduced The fatigue that author's long working is caused.

Handrail 49 possesses：Front and rear handrail rear portion 49a more long and from handrail rear portion 49a towards front outside extend Handrail front part 49b.Handrail front part 49b relative to by with manipulate attend a banquet 8 it is parallel side by side in the way of be extended handrail For rear portion 49a, it is configured to direction and manipulates 8 separate right lateral direction bendings of attending a banquet, it is overall as handrail 49, overlook When for substantially in "<" shape form.

Handrail 49 is formed with the front of handrail front part 49b：The notch 49c of the depression that faced down from upper table, is cutting Main shift lever 50 has been provided projectingly in oral area 49c.Attended a banquet 8 sides (rear of notch 49c) in the manipulation of handrail front part 49b Upper surface is formed with：From the stage portion 49d that upper table is recessed downwards, it is configured with the upper surface of stage portion 49d：Speed sets Determine dial 226 and speed selection switch 227.It is configured with the ratio of the handrail 49 also low position of supporting surface of letting go：As rotation The speed setting dial 226 of operating knob and the speed selection switch 227 as mode selector switch button.

In addition, the height and position of the upper surface of stage portion 49d is：Upper surface than notch 49c is high and than handrail rear The low position in the upper surface of portion 49a.Thus, even if its forearm and ancon are shelved on handrail rear portion 49a and grasped by operator Make the main shift lever 50 in front of handrail front part 49b, it is also possible to prevent：Forearm of operator etc. inadvertently contacts stage portion The speed setting dial 226 and speed selection switch 227 of 49d such that it is able to reduce speed setting dial 226 and car The maloperation of fast selecting switch 227.

In addition, speed setting dial 226 is used to preset the highest rotary speed or travel machine body 2 of engine 5 Maximum travel speed.Speed selection switch 227 be used for specify speed set dial 226 set by values be engine 5 most The maximum travel speed of high rotation speed or travel machine body 2 which.Thus, specified by speed selection switch 227 During rotary speed, then the highest rotary speed that dial 226 sets engine 5 is set by speed, on the other hand, by car When fast selecting switch 227 specifies travel speed, then the highest traveling speed that dial 226 sets travel machine body 2 is set by speed Degree.

In addition, as shown in Figure 17~Figure 26 etc., main shift lever 50 has flat core bar body 291 (core bar gold Category body), the core bar body 291 is provided with the handle (handle part) 292 held for operator in upper end side.Under the core bar body 291 Side on the downside of notch 49c that is, handrail front part 49b inside rotatably by pivotal support in speed change branch Point axle 295.Main shift lever 50 is configured to tilt forward and back movement around speed change fulcrum shaft 295.That is, main shift lever 50 Substantially can be in vertical posture to carrying out tilting forward and back moving operation between forward lean.No matter the inclination appearance of main shift lever 50 How is gesture, and handle 292 is all the state protruded from the front flexure plane of handrail front part 49b.Thus, handle 292 is grasped The hand of operator contiguously can will not successfully carry out the operation of main shift lever 50 with handrail front part 49b.

Possesses the main transformer for tilting forward and back mobile potentiometer instrument (variable resistance) type for detecting main shift lever 50 Fast sensor 222.Speed change fulcrum shaft 295 is configured in the leading section of handrails framework body 332, main transformer speed sensor 222 is fixed into peace Handrails framework body 332 loaded on the rear of speed change fulcrum shaft 295.The lower end side of core bar body 291 is extended towards rear, pass through Chain bar 345 is interlocked, main transformer speed sensor 222 is linked to the lower end extended portion of core bar body 291, make the front end of gearing chain bar 345 Side protrudes from the main transformer speed axle of sensor 222 towards front, and makes the horizontal-extending setting in the longitudinal direction of gearing chain bar 345, will The front for interlocking chain bar 345 is linked to the base end part (the lower end extended portion of core bar body 291) of main shift lever 50.That is, By speed change fulcrum shaft 295 and main transformer speed sensor 222 being arranged before and after, so as to by main shift lever 50 and main transformer speed sensor 222 installation portion is configured to compact.

It is configured to：The helical spring 346 of package friction support on speed change fulcrum shaft 295, by helical spring 346 Frictional force is suppressed, main shift lever 50 is supported in variable speed operation position.It is right when making main shift lever 50 towards front side inclination movement Should in potentiometer instrument (variable resistor) type main transformer speed sensor 222 detected by come main shift lever 50 operating position, Pump swash plate 523 (reference picture 13, Figure 14) is set to be rolled towards positive inclination angle oblique so that the travel speed of travel machine body 2 accelerates.Separately On the one hand, when making main shift lever 50 towards rear side inclination movement, corresponding to the main transformer come detected by main transformer speed sensor 222 The operating position of fast bar 50, makes pump swash plate 523 (reference picture 13, Figure 14) be rolled towards negative inclination angle oblique so that travel machine body 2 Travel speed slow down.

There is automatic lifting switch lever 311 in the preceding surface configuration of handle 292, the side of 8 sides of being attended a banquet in the manipulation of handle 292 (left surface) is configured with lifting inching switch button 312,313.Automatic lifting switch lever 311 is used for the working rig of rotary cultivator etc. Forcibly descending operation is to specified altitude.Lifting inching switch button 312,313 is used for the height to the working rig of rotary cultivator etc. Degree position is finely adjusted section operation.

Automatic lifting switch lever 311 is the lever switch of the self- recoverage type (prompt type) in above-below direction inclination movement.Make When automatic lifting switch lever 311 is towards upside inclination movement, the working rig of rotary cultivator etc. can rise to set most rising Height and position, on the other hand, when making automatic lifting switch lever 311 towards downside inclination movement, under the working rig of rotary cultivator etc. Drop to the position set by homework department's position dial 53.Lifting inching switch button 312,313 switchs structure by self- recoverage type Into, during operation lifting inching switch button 312,313, the working rig lifting of rotary cultivator etc..

So, because main shift lever 50 possesses automatic lifting switch lever 311, lifting inching switch button 312,313, operation Person is only by the right-hand operated for main shift lever 50, it becomes possible to simply carry out control corresponding with Hang Shi Zhuan Condition.Namely Say, operated by the inclination movement for carrying out main shift lever 50 while operating automatic lifting switch lever 311 and lifting fine setting Whole switch 230, it becomes possible to adjust the height and position of the working rig of rotary cultivator etc..

As shown in Figure 18, Figure 21, Figure 22, handrail front part 49b of the intercalation of homework department's position dial 51 in handrail 49 Right flank recess (side of the side of right mud guard 21).

Homework department's position dial 51 is supported at the right flank recess center of handrail front part 49b by axle, in Seeding location Put dial 51 outer peripheral face (handrail front part 49b upper surface sides) possess towards outside top projection operation projection 314. That is, operation projection 314 is embedded in the otch on the upside of the right flank recess of handrail front part 49b.Operator can be from The upper surface side of handrail 49 confirms the operation projection 314 of homework department's position dial 51, is set in the anterior lateral surface of handrail Homework department's position dial 51 is put, homework department's position dial 51 is formed as：Can carry out outside homework department's position dial 51 The shape that the side operation and operation of side face are operated with the upper surface button of projection 314.

In addition, even if operation is located at the upper of homework department's position dial 51 with projection 314, operation is with projection 314 End is in the position also lower than handrail front part 49b upper surfaces.Rotationally constrained portion is connected to by operation projection 314 (otch leading section or rearward end on the upside of the right flank recess of handrail front part 49b), can limit homework department's position scale Rotation of the disk 51 towards front or behind.Therefore, can not only prevent：Operation is touched in the operation mistiming of main shift lever 50 Portion's position dial 51, additionally it is possible to its rotary area is limited with Rack in the operation of homework department's position dial 51.

(side of right mud guard 21) is prominent more laterally than handrail front part 49b right flanks for homework department's position dial 51. Thus, operator can not only from the upside of handrail 49 by finger etc. make operation with moved after projection 314 forward trend come to make Industry portion position dial 51 carries out rotation process, but also can pass through finger from the right side of handrail 49 top (side of mud guard 19) Rotation process is carried out to homework department's position dial 51 etc. operation is made with being moved after projection 314 forward trend.Therefore, operator exists In the state of forearm is shelved on handrail 49, homework department's position dial 51 can be easily operated, lift lift arm 193 It is mobile, the working rig of rotary cultivator etc. is risen movement by lower link 21.

In embodiments, it is configured with the forward portion of handrail 49 that is, the upper surface of handrail front part 49b：Main transformer speed Bar 50, speed setting dial 226, speed selection switch 227, homework department position is configured with the side of handrail front part 49b Dial 51.Therefore, even if operator is in the driving of tractor 1, also readily identify driving system operating mechanism and Operating system operating mechanism, can effectively prevent maloperation.In addition, because to the main transformer speed as driving system operating mechanism Bar 50, setting dial 226 and selecting switch 227 carry out centralized configuration, so its operational (treatability) is excellent.

As shown in Fig. 1, Figure 15~Figure 27, manipulation is installed in travel machine body 2 and attends a banquet 8 to be taken for operator, and Handrail 49 is configured 8 side of attending a banquet is manipulated, is the base end part by main shift lever 50 with by change in such working truck The mode that fast fulcrum shaft 295 can be rotated is arranged on the construction of the front portion of the handrail 49, by interlocking chain bar 345, speed change is passed Sensor 222 is linked to the base end part of main shift lever 50, it is possible to the leading section of handrail 49 is formed as into compact, so as to Enough prevent the pin of operator from abutting to the leading section of handrail 49.Because can be formed smaller by the shape of handrail 49, no The pedal operation of operator can be hindered, operator 49 can cosily carry out operation.

As shown in Figure 15~Figure 27, the front of gearing chain bar 345 is set to be protruded towards front from the axle of speed change sensor 222, Make the horizontally extending setting in the longitudinal direction of gearing chain bar 345, and the front for interlocking chain bar 345 is linked to main shift lever 50 base end part, it is possible to the leading section of handrail 49 spaces compact configure main shift lever 50 and speed change sensor 222, And can easily reduce the system limit of main shift lever 50 and the relative position of speed change sensor 222.

As shown in Figure 15~Figure 27, because being configured to：The helical spring of friction support is set on speed change fulcrum shaft 295 346 (torsionsprings), frictional force is suppressed by helical spring 346, main shift lever 50 is supported in operating position, thus with example As disk spring construction is compared, the installation space of helical spring 346 is narrow and small, can fully obtain the friction branch of main shift lever 50 Support force, can simply increase the operation sense of main shift lever 50, operated and can easily be selected by the main shift lever 50 of operator Most appropriate velocity stage is selected, so as to improve variable speed operation.

As shown in Figure 15~Figure 27, manipulation is installed in travel machine body 2 and attends a banquet 8 to be taken for operator, and in behaviour It is vertical attend a banquet 8 side configuration handrail 49, be that the homework department position for possessing hydraulic lifting operation is carved in such working truck The construction of scale 300, the lateral surface in the front portion of handrail 49 is provided with homework department's position dial 300, and homework department position is carved Scale 300 is formed to carry out the shape of side operation and the operation of upper surface button, it is possible to by homework department's position scale No matter while the setting unit of disk 300 is formed as compact, which side of side or upper surface work can be simply operated from Industry portion position dial 300 such that it is able to easily improve the operability of homework department's position dial 300, reduces maloperation.Example Such as, 8 it is rotated in the left and right in operation and also has no problem even if manipulating to attend a banquet, can rightly operates homework department's position dial 300。

As shown in Figure 15~Figure 27, because being configured with the position of the supporting surface of letting go less than handrail 49：Grasped as rotation Make the speed setting dial 226 or the speed selection switch 227 as mode selector switch button of button, even if so operation Hand is positioned over the upper surface of handrail 49 by person, there will not be maloperation speed setting dial 226 or speed selection switch 227, Speed can be rightly operated to set dial 226 or speed selection by being placed on the finger of the operator of the upper surface of handrail 49 Switch 227.

As shown in Fig. 1, Figure 15~Figure 27, manipulation is installed in travel machine body 2 and attends a banquet 8 to be taken for operator, and Manipulate attend a banquet 8 side configure handrail 49, in such working truck, be configured to：It is provided with as handrail can be changed The tilt adjustment bolt 342 of the screw structure body of 49 setting angle, with can by the operation of tilt adjustment bolt 342 quilt The mode for infinitely adjusting, handrail 49 is supported on the movable frame body 331 as arm supports body, so not using work Tool, it becomes possible to infinitely change the mounting position of handrail 49, it is possible to increase the ride of operator, and that can improve configuration In the operability of the operating portion of handrail 49, maloperation is reduced.

As shown in Figure 15~Figure 27, it is configured to, handrail 49 is linked in the way of it can change setting angle：Manipulate and sit The seat board support frame portion 322 of the seat mount body 321 of seat 8 and back support frame portion 323, by the dual-gripper of handrail 49 described Seat mount body 321, it is possible to reduce handrail 49 by dual-gripper simple structure rocks vibration, can simply increase The rigidity of support of handrail 49.

As shown in Figure 15~Figure 27, from manipulate attend a banquet 8 seat mount body 321 seat board support frame portion 322 erect set Put vertical frame body 327, and crossing frame body 328 is extended from the 8 back support frame portion 323 of attending a banquet is manipulated, by handrail branch Point axle 334 and the rear end side of handrail 49 is linked to linking part between vertical frame body 327 and crossing frame body 328, and make to incline Side is connected to below the front of handrail 49 oblique regulating bolt 342 from below, it is possible to easily improving the support of handrail 49 Rigidity, and the setting angle for making handrail 49 can infinitely be changed by the descending operation of tilt adjustment bolt 342, can Easily handrail 49 is supported to be suitable for the posture of operator's impression.

As shown in figure 27, manipulation is installed in travel machine body 2 and attends a banquet 8 to be taken for operator, and 8 are attended a banquet in manipulation Side configuration handrail 49, in such working truck, make the rear outside face 49e of handrail 49 towards attending a banquet 8 manipulating Circumferencial direction centered on feathering axis 325 is inclined, so the right side post 42 and handrail 49 of 8 sides of attending a banquet need not manipulated Between form big gap, can compactly constitute manipulate attend a banquet 8 with the construction of the installation portion of handrail 49, can connect right side post 42 It is near to manipulate 8 sides of attending a banquet such that it is able to improve the operability of the bar or Switch on the post 42 of right side.

As shown in Figure 15~Figure 27, make the medial surface of the right side post 42 opposed with the rear portion of handrail 49 towards attending a banquet 8 manipulating Feathering axis 325 centered on circumferencial direction bending, even if so to the left and right change manipulate attend a banquet 8 direction, it is also possible to Avoid the collision at the rear portion of handrail 49 and right side post 42, can approach manipulate attend a banquet 8 ground configure right side post 42 upper surface bar or Person's Switch.

As shown in Figure 15~Figure 27 because by the medial surface bending section 42a of the right side post 42 opposed with the rear portion of handrail 49 and Medial surface bending section 42b from the anterior opposed right side post 42 of handrail 49 is formed as different shapes, even if so making handrail 49 Front portion be extended and be：The grade of easily operated main shift lever 50 it is outer towards shape, it is also possible to be easily prevented from outer towards shape The front shock of handrail 49 to lateral column medial surface.

Symbol description

2 travel machine bodies

8 manipulate seat

42 right side posts

The posterior medial face bending section of 42a right sides post

The front inner face bending section of 42b right sides post

49 handrails

50 main shift levers

300 homework department's position dials

321 seat mount bodies

322 seat board support frame portions

323 back support frame portions

325 feathering axis

327 vertical frame bodies

328 crossing frame bodies

331 movable frame bodies (arm supports body)

334 handrail fulcrum shafts

342 tilt adjustment bolts (screw structure body)

345 interlock chain bar

346 helical springs

Claims

1. a kind of working truck, manipulation is installed in travel machine body and is attended a banquet to be taken for operator, and sat in described manipulation The side configuration handrail of seat, it is characterised in that

The inclination of the setting angle for being provided with changing the handrail in the arm supports body for carrying out the handrail pivot branch is adjusted Section part,

The seat mount body that the arm supports body can attend a banquet relative to the manipulation is moved forward and backward, while the handrail It is supported for：Can infinitely be adjusted by the operation of the tilt adjustment part.

2. working truck according to claim 1, it is characterised in that the seat mount body that the manipulation is attended a banquet has：Seat Plate support frame portion, its mounting is described to manipulate the seat board portion attended a banquet；And the back support frame portion of left and right, its support behaviour The vertical back-rest attended a banquet,

The handrail in the way of it can change setting angle by dual-gripper it is described left and right back support frame portion a side With the seat board support frame portion.

3. working truck according to claim 1, it is characterised in that from the seat board of the seat mount body for manipulating and attending a banquet Support frame portion erects the vertical frame body for setting and the extended crossing frame of the back support frame portion attended a banquet from the manipulation Body is concatenated,

The arm supports body is linked to is determined by the vertical frame body and the crossing frame body in such a manner that it can move back and forth Cuboid,

The rear end side of the handrail is linked to the rear end of the arm supports body, and the tilt adjustment by handrail fulcrum shaft Side is connected to the front lower surface of the handrail to part from below.

4. working truck according to claim 1, it is characterised in that be configured to：By the base end part of main shift lever with can The mode of rotation is arranged on the handrail front portion by speed change fulcrum shaft, and speed change sensor is linked to the master by interlocking chain bar The base end part of gear lever.

5. working truck according to claim 4, it is characterised in that

It is configured to：Possess homework department's position dial of hydraulic lifting operation, institute is set in the handrail anterior lateral surface Homework department's position dial is stated,

Homework department's position dial is formed as：The shape of side operation and the operation of upper surface button can be carried out.

6. working truck according to claim 5, it is characterised in that

Rotary operation knob or mode selector switch button are configured with the ratio of the handrail also low position of supporting surface of letting go.