Embodiment 1
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, one embodiment of the present invention will be described with reference to the accompanying drawings.
Fig. 1 and Fig. 2 show a side view and a transmission schematic view of a working vehicle 1 to which an embodiment of the present invention is applied.
As shown in Fig. 1, the working vehicle 1 is a tractor to which a working machine 10 can be laid.
1 and 2, the working vehicle 1 includes a base frame 2, a driving engine 3 supported by the base frame 2, And a pair of left and right traveling devices 4 that are driven by a driver (not shown).
The pair of left and right traveling devices 4 in the present embodiment has a pair of left and right front wheels 4b and a pair of left and right rear wheels 4a, The rear wheel 4a and, if necessary, the left and right front wheels 4b are driven.
A rear portion of the base frame 2 is provided with a transmission case 50 housing a transmission 5 for appropriately shifting the rotation of the engine 3 to transmit the rotation to the rear wheel 4a and the front wheel 4b. Respectively. A PTO shaft 61 for driving a working machine 10 such as a cultivator is provided on the rear side of the transmission case 50 so as to protrude rearward.
The transmission 5 includes a traveling system electric path for transmitting the power input from the engine 3 via the transmission shaft 30 (see FIG. 2) to the drive wheels (in this embodiment, the rear wheels (4b) that serves as a main drive path and a subordinate drive wheel for transmitting power to the PTO shaft (4a), and a drive system power transmission path for transmitting power from the engine (3) to the PTO shaft And a PTO-based electric path for outputting the electric power to the outside via the electric motor 61.
As shown in Fig. 2, the transmission 5 is a traveling system electric power transmission path, in which the output from the engine 3 is inputted and is connected to the continuously-variable transmission device 51 functioning as a main transmission device, Forward switching device (52) capable of taking in an electric state for transmitting the rotational power from the electric motor (51) in the normal rotation or reverse rotation direction and a cutting state for interrupting the transmission of the rotational power, And a differential gear unit 54 for differentially transmitting rotational power from the auxiliary transmission 53 to the left and right rear wheels 4a, Respectively.
In the present embodiment, the transmission 5 is a two-wheel drive / four-wheel drive switching device (hereinafter, referred to as a " front " 55).
In the present embodiment, the continuously-variable transmission device 51 is an in-line type hydraulic step-variable transmission device in which the transmission input shaft 511 and the transmission output shaft 512 are concentrically arranged. The transmission output shaft 512 has a hollow shape, and the transmission input shaft 511 passes through the inside thereof.
2, the continuously-variable transmission device 51 includes the transmission input shaft 511 operatively connected to the transmission shaft 30, and a hydraulic pump main body 511 supported by the transmission input shaft 511 to be non- A hydraulic motor main body 514 fluidly connected to the hydraulic pump main body 513 and the speed change output shaft 512 for outputting a rotational power of the hydraulic motor main body 514;
At least one of the hydraulic pump main body 513 and the hydraulic motor main body 514 is of a variable volume type. In the present embodiment, the hydraulic pump main body 513 is of a variable volume type.
Therefore, the continuously-variable transmission device 51 is provided with a movable swash plate 515 for changing the supply flow rate of the hydraulic pump main body 513, and a variable transmission hydraulic pressure pump 514 for tilting the movable swash plate 515, And a cylinder 516 are provided.
According to the continuously-variable transmission device 51, by operating the speed change hydraulic cylinder 516 in accordance with the operation of the speed change operation member (described later) as the operating member, the speed change input shaft 511 and the speed change output shaft 515 of the movable swash plate 515, The inclination angle with respect to the hydraulic pump main body 512 is changed and the operating flow rate discharged from the hydraulic pump main body 513 to the hydraulic motor main body 514 is changed. The rotational speed ratio of the speed change output shaft 512 to the speed change input shaft 511 is determined according to the operating flow rate discharged from the hydraulic pump main body 513 to the hydraulic motor main body 514. [
The forward-reverse switching device 52 is sandwiched between the continuously-variable transmission device 51 and the auxiliary transmission device 53 as shown in FIG.
The forward-reverse switching device 52 includes a forward clutch 522 and a reverse clutch 523 which are loosely fitted to a forward-reverse output shaft 521 for outputting a forward or reverse rotation output, a forward clutch 522, And has a forward input gear 524 and a reverse input gear 525 which are fixed relative to each other in the reverse clutch 523 so as to be relatively unrotatable.
The forward input gear 524 is engaged with a speed change output gear 517 fixed to the speed change output shaft 512 so as not to be rotatable relative to the speed change output shaft 512.
The reverse input gear 525 is engaged with the first counter gear 527 fixed to the counter shaft 526 parallel to the forward / reverse output shaft 521 so as to be relatively non-rotatable.
The transmission output gear 517 is also engaged with a second counter gear 528 fixed to the counter shaft 526 to be non-rotatable.
The forward and reverse clutches 522 and 523 are known friction multi-plate type hydraulic clutches, respectively. When the forward input gear 524 is connected to the forward / rearward output shaft 521 with the forward clutch 522 engaged with the clutch, the rotational output of the transmission output shaft 512 is transmitted to the output shaft of the shift output gear And the forward input gear 524 to the forward / backward output shaft 521 so that the forward / backward output shaft 521 rotates in the gas advance direction. Conversely, when the reverse clutch 523 is engaged with the clutch and the reverse input gear 525 is connected to the forward / reverse output shaft 521, the rotation output of the transmission output shaft 512 is transmitted to the transmission output gear 517 Is transmitted to the forward / reverse output shaft 521 through the second counter gear 528, the counter shaft 526, the first counter gear 527 and the reverse input gear 525, (521) rotates in the gas backward direction.
In the present embodiment, the forward-reverse switching device 52 also functions as a main clutch for engaging or disengaging transmission of rotational power from the engine 3 to the traveling device 4. [ That is, by engaging one of the forward clutch 522 and the reverse clutch 523 with the forward / backward output shaft 521, it is possible to transmit power to the traveling device 4 (state of the main clutch ON) And the forward clutch 522 and the reverse clutch 523 are prevented from engaging with the forward and reverse output shaft 521 so that the transmission of power to the traveling device 4 is blocked State).
The auxiliary transmission (53) has a plurality of shift gear pairs, and selectively engages the plurality of shift gear pairs to shift the rotational power of the forward / rearward output shaft (521), and then the forward output shaft (531) and the rear output shaft 532 in the direction of rotation.
The rotational power of the rear output shaft 532 is differentially transmitted to the pair of rear wheels 4a through the differential gear unit 54 and the rotational power of the front output shaft 531 is transmitted to the two- And is selectively transmitted to the pair of front wheels 4b through the four-wheel drive switching device 55. [
Further, in the present embodiment, the 2WD / 4WD switching device 55 also has a front wheel speed increasing mechanism capable of driving the front wheels 4b at a higher speed by driving four wheels. That is, the two-wheel drive / four-wheel drive switching device 55 can take any one of the drive-released state, the normal drive state and the speed-increasing drive state of the front wheels 4b.
The transmission (5) includes a PTO clutch (56) capable of switching engagement or disengagement of transmission of rotational power of the engine (3) input through the transmission shaft (30) as the PTO system transmission path, And a PTO transmission device 59 for shifting the rotational power of the transmission 3.
The PTO clutch 56 is a well-known friction multi-plate type hydraulic clutch loosely fitted to the clutch output shaft 57. The PTO clutch 56 is engaged with the clutch output shaft 57 via a PTO clutch hydraulic cylinder 58 So that the rotational power of the transmission shaft 30 is transmitted to the clutch output shaft 57. [
The PTO transmission 59 has a plurality of transmission gear pairs and is operatively connected to the PTO shaft 61 after shifting the rotational power of the clutch output shaft 57 by selectively engaging the plurality of pairs of transmission gears To transmit the rotational power to the PTO shift output shaft (60).
The working machine 10 that can be installed on the working vehicle 1 is configured to be movable up and down with respect to the base frame 2 and tiltable right and left by rotation about an axis along the gas longitudinal direction.
1, the working machine 10 includes a tillage claw shaft 11 having a plurality of tillage claws 12 as a tilling claw shaft 11 extending along the width direction of the base body ) Of the rotary tiller.
The working machine 10 is configured such that the link frame 17 to which the till claw shaft 11 is axially supported is connected to the base frame 2 via the link mechanism 16. [ The link mechanism 16 includes an upper link 161, a pair of left and right lower links 162, and a pair of left and right lower links 162 for moving the tiller claw shaft 11 up and down with respect to the base frame 2 And a pair of left and right link rods 163 for connecting the lower link 162 to each other.
The working machine 10 further includes a tilling upper surface cover 13 disposed so as to cover the rotation locus C around the tilling claw shaft 11 of the tilling claw 12, And a tilting rear cover 19 disposed so as to cover the rear of the rotational locus C of the tilting rear cover. The tiller rear cover 19 is connected to the rear end of the tiller top cover 13 via a pivot shaft 14 along the gas width direction.
The rear end of the tiller rear cover 19 is also grounded so that the rear end of the tiller rear cover 19 is connected to the pivot shaft 19 by the grounding pressure in the lowered state of the working machine 10 to which the tiller claw 12 is grounded. 14). The rear end of the tiller rear cover 19 is lifted from the ground and the rear end of the tiller rear cover 19 is lifted up from the ground surface in the raised state of the working machine 10 lifted from the ground surface, And pivots about the pivot shaft 14 downward.
That is, the tiller depth D at that time can be measured by measuring the rotation angle of the tiller rear cover 19 around the pivot shaft 14 with respect to the tiller top cover 13.
The rotary tiller 10 according to the present embodiment includes a rear cover sensor 88 for detecting a tilting angle of the tiller rear cover 19 around the pivot shaft 14 with respect to the tiller top cover 13 ).
In the present embodiment, the working vehicle 1 has an elevation driving device 15 for elevating the working machine 10 with respect to the base frame 2.
As shown in FIG. 1, the elevation driving device 15 includes a pair of left and right lifts (not shown) for connecting the till claw shaft 11 of the working machine 10 so as to be able to move up and down relative to the base frame 2 A rotary shaft 152 that supports the lift arm 151 directly or indirectly to the base frame 2 along a gas width direction and a lift shaft 151 that supports the lift arm 151 around the rotation shaft 152 And an elevating control hydraulic cylinder 153 (to be described later) that rotates the elevating control hydraulic cylinder 153. [
The work vehicle 1 has a work implement lifting / lowering position sensor 81 for detecting the lifting / lowering position of the working machine 10 with respect to the base frame 2.
Specifically, the work machine lifting / lowering position sensor 81 can be realized by a rotation angle sensor that detects a rotation angle of the lift arm 151 around the rotation shaft 152. [
Further, the working vehicle 1 has a tilting drive device 18 for tilting the working machine 10 with respect to the base frame 2 in the left-right direction.
As shown in Fig. 1, the tilt drive device 18 has a tilt control hydraulic cylinder 181 sandwiched between any one of the pair of left and right link rods 163.
Either one of the left and right pair of link rods 163 is configured to be able to expand and contract in length with respect to either one of the left and right pair of link rods 163 by the tilt control hydraulic cylinder 181, The tiller claw shaft 11 can be tilted right and left with respect to the base frame 2 by stretching one of the pair of link rods 163 to the other side.
As shown in Fig. 1, the working vehicle 1 has a gas inclination sensor 82 capable of measuring the right and left inclination angles with respect to the ground surface of the working vehicle 1. As shown in Fig.
The working vehicle 1 has a working machine inclination sensor 83 (see FIG. 4 to be described later) for measuring the right and left inclination angles with respect to the base frame 2, though not shown in FIG.
2, the working vehicle 1 according to the present embodiment includes a control device 8 capable of receiving signals from various operation members and sensors and actuating corresponding actuators (hydraulic cylinders, etc.) Respectively.
The control unit 8 includes a traveling system control unit 80a for controlling various transmission devices and switching devices of the traveling system electric power path and a PTO system control unit 80b for controlling the PTO clutch 56 of the PTO- (See FIG. 3 to be described later), and a work machine control unit 80c (see FIG. 4 to be described later) for performing various controls of the work machine 10.
The traveling system control unit 80a, the PTO system control unit 80b, and the work machine control unit 80c may be configured as separate control units, and two or more control units may be used as one control unit Maybe.
Fig. 3 is a control block diagram of the running system and the PTO system of the working vehicle 1 shown in Figs. 1 and 2. Fig.
In the present embodiment, the working vehicle 1 has a traveling system operating member 71 as the operating member, as shown in Fig. The traveling system operating member 71 includes a speed change operating member 711 for operating the continuously-variable shifting device 51 and a maximum speed setting member 712 for setting the maximum speed output value of the continuously- .
The working vehicle 1 further includes a shift operation detection sensor 84 for detecting the operation position of the shift operating member 711 and a maximum speed setting sensor 85 for detecting the operation amount of the maximum speed setting member 712 ).
The traveling system control unit 80a is configured to control the operation of the speed change hydraulic cylinder 516 based on a signal from the speed change operation detection sensor 84. [
The traveling system control unit 80a controls the speed ratio of the continuously-variable transmission device 51 when the shifting operation member 711 is fully operated within the operable range in accordance with the operation amount of the maximum speed setting member 712 .
According to the working vehicle 1 having the above-described configuration, the operation amount of the maximum speed setting member 712 to be operated by the artificial operation is detected by the maximum speed setting sensor 85, The maximum output value of the device 51 is changed.
When the speed ratio of the continuously-variable transmission device 51 when the speed change operation member 711 is fully operated within a predetermined operable range is changed, the control device 8 controls the speed change hydraulic cylinder 516, and actuates (warp) the movable swash plate 515 of the continuously-variable transmission device 51. [
That is, the control device 8 controls the output rotation speed of the continuously-variable transmitting device 51 so that the speed becomes the predetermined speed set by the maximum speed setting member 712 even when the speed change operation member 711 is fully operated.
In this manner, the maximum speed setting member 712 can set the maximum speed at the time of maximum operation of the speed change operation member 711, thereby improving the resolution of the vehicle speed setting, and the vehicle speed control can be performed with higher accuracy .
Fig. 4 is a control block diagram of the working machine of the working vehicle 1 shown in Figs. 1 and 2. Fig.
4, the working vehicle 1 according to the present embodiment includes a working machine lifting lever 72 for lifting and lowering the working machine 10 by manual operation as the operating member, And a working machine tilting setting member 731 for setting the tilting of the working machine 10 with respect to the work machine 10.
The working machine control unit 80c controls the working machine 10 on the basis of the signals set and inputted by the working machine elevating lever 72 and the working attitude setting member 73 in a state where the working machine 10 is installed Thereby controlling the elevation control and the right and left inclination of the base frame 2.
Will be described in more detail. The work vehicle 1 has a work machine lifting / lowering operation position detecting sensor 86 for detecting the operation amount of the work machine lifting lever 72. The working machine controlling portion 80c is connected to the lifting / Lift control device 15 in accordance with the operation amount of the work machine lift lever 72 detected by the work machine lift lever 72 so that the elevation position of the work machine 10 relative to the work vehicle 1 can be changed.
In the present embodiment, the working-machine lifting / lowering lever 72 is rotatable about a rotation axis 721 along the base width direction as described later, and the working-machine lifting / And detects an operation amount of the work machine lift lever 72 by detecting a rotation angle of the lever 72 around the rotation axis 721. [
When the operation device elevating lever 72 is operated in the above configuration, the control device 8 operates the elevation driving device 15 to elevate and lower the working device 10 according to the operation, And is moved to a height corresponding to the operating position of the working machine lifting lever 72. [
4, the working vehicle 1 according to the present embodiment is provided with a working device vertical operation member 74 for performing upward and downward movement of the working machine 10 by one-touch operation. The work posture setting member 73 is provided with a worker lifting position setting member 734 for setting the lifted position of the work machine 10 in the operation of the worker vertical operation member 74. [ The work machine lifting and lowering lever 72 can also function as a work machine lowering and positioning member for determining the lowering position of the work machine 10 in the operation of the work machine up and down operation member 74.
The work machine control unit 80c controls the operation of the work machine elevating and lowering member 734 so that the elevation position of the work machine 10 detected by the elevating machine position detecting sensor 81 is changed by the operation of the elevator operating member 74, The elevation drive device 15 is operated so as to be the elevation position set on the basis of the operation position of the elevator drive lever 72 or the elevation position set on the basis of the operation position of the elevator lever 72. [
In the present embodiment, the working machine inclination setting member 731 includes an automatic control inclination setting member 732 for setting the working machine 10 at a predetermined inclination angle, a manual inclination setting unit 732 for manually operating the inclination angle of the working machine 10, And a member 733.
The working machine control unit 80c controls the inclination angle of the working machine 10 such that the inclination angle of the working machine 10 detected by the working machine inclination sensor 83 is set to the predetermined inclination angle in accordance with the inclination angle set by the automatic control inclination setting member 732 And controls the operation of the device 18.
Further, the working machine control unit 80c operates the inclination driving device 18 in accordance with the manipulated variable operated by the manual inclination setting member 733. [
The work posture setting member 73 is provided with a tillage depth setting member 735 for setting the tillage depth D of the working machine 10.
The working machine control unit 80c controls the tillage depth D of the working machine 10 detected by the rear cover sensor 88 according to the tilling depth setting value set by the tillage depth setting member 735, And controls the elevating and lowering drive device (15) to be at the depth set value.
In the present embodiment, the working machine control unit 80c controls the lowering speed when the working machine 10 is lowered, when the working machine 10 exceeds the predetermined reference lifting position, The elevation driving device 15 is controlled so as to be slower than the case where it is located above the predetermined reference elevation position (downhill cushion control).
Specifically, the working vehicle 1 includes a lowering cushion setting member 75 for changing the reference elevation position. The working machine control unit 80c controls the lowering cushion setting member 75 The downhill cushion control is performed based on the reference elevation position.
In the present embodiment, the working vehicle 1 has a PTO-type operating member 76 as the operating member, as shown in Fig.
The PTO-system operating member 76 includes a PTO output operating member 761 for performing a switching operation of engagement or disconnection of power transmission to the PTO shaft 61.
The working vehicle 1 also has a PTO clutch hydraulic cylinder 58 for operating the PTO clutch 56. The PTO control unit 80b is connected to the PTO output operating member 761, And is configured to control the operation of the clutch hydraulic cylinder 58 and to switch the meshing or non-meshing of the PTO clutch 56. [
In the present embodiment, the working vehicle 1 is provided with a main clutch 52 for detecting the engaged state or the non-engaged state of the forward clutch 522 and the reverse clutch 523 in the forward- And a detection sensor 87.
The PTO operating member 76 is capable of switching the mode of intermittent control of the PTO clutch 56 according to the engagement state of the forward / reverse switching device 52 and / or the up / down state of the working machine 10 And a PTO-based control switching member 762.
When the PTO control switching member 762 is in the power transmission state (main clutch ON state), either the forward clutch 522 or the reverse clutch 523 is in the PTO output operating member 761, The PTO clutch 56 is forcibly brought into a power cut-off state when both the forward clutch 522 and the reverse clutch 523 are in the power cut-off state while the PTO clutch 56 is engaged in accordance with the operation of the PTO clutch 56 When it is detected that the working machine 10 is located at a predetermined lowering position (work position) by the interlocking mode and the worker lifting position sensor 81, the PTO output operation member 761 is operated, When the state of the work machine 10 ascended to a predetermined position is detected by the work machine lift position sensor 81 and the clutch 56 is interrupted and the operation of the PTO output operation member 761 is detected And the PTO output operating member 761 is operated independently of the intermittent operation of the forward / backward switching device (main clutch) 52 and the elevating position of the working machine 10, So that the PTO clutch 56 can be operated in the independent mode.
That is, when the PTO output operating member 761 is turned on in the interlocking mode of the PTO control switching member 762, the PTO control unit 80b determines that the main clutch 52 is in the ON state The PTO clutch 56 is controlled to be engaged, but the PTO clutch 56 is not controlled to be engaged when the main clutch 52 is in the OFF state.
When the PTO output operating member 761 is turned on in the ascending / descending linkage mode of the PTO control switching member 762, the PTO control unit 80b detects The PTO clutch 56 is engaged when the lifting position of the working machine 10 is at the predetermined lowering position. However, when the working machine 10 is at the predetermined lifting position (for example, The engagement of the PTO clutch 56 is not controlled.
In the present embodiment, the working vehicle 1 is provided with a cabin 9 directly or indirectly supported on the base frame 2, as shown in Fig. The cabin 9 is disposed on the rear side of the engine 3 and above the front side of the pair of left and right traveling devices 4 (in this embodiment, the left and right pair of rear wheels 4a) And a pair of right and left fenders 91 formed so as to surround the left and right fenders 91.
Fig. 5 is a plan view of the inside of the cabin in the working vehicle 1 shown in Figs. 1 and 2. Fig.
The cabin 9 has a bottom member 94 for partitioning the bottom of the cabin 9 and an operator seat 92 provided between the fenders 91 as shown in Fig. A plurality of operating members are provided on the front and side of the driver's seat 92.
Fig. 6 is a front perspective view of the inside of the cabin shown in Fig. 5 in the vicinity of the driver's seat.
5 and 6, the bottom member 94 includes a first bottom member 941 for the driver to place a foot in front of the driver's seat 92 and a pair of left and right fenders 91 And a second floor member 942 having an upper surface positioned higher than the first floor member 941 and provided with the driver's seat 92 therebetween.
Hereinafter, the armrest structure applied in the present embodiment will be described.
5 and 6, the armrest structure of the present embodiment is provided with an armrest 93 having an armrest body 931 disposed on one side of the driver's seat 92 in the vehicle width direction have.
The armrest 93 also has a forward extension 934 that extends forward from the armrest body 931.
The shift operating member 711 is provided on the gas-width direction outer side surface 934a of the front extension portion 934. [
According to the above configuration, the forward extending portion 934 extending forward from the armrest main body 931 is provided and on the gas lateral direction outer side surface 934a of the forward extending portion 934, The operator can access the shift operating member 711 in a state in which a free space exists above and below the wrist by placing the arm on the arm rest body 931 with the palm facing inward . Therefore, operability of the speed change operation member 711, which is frequently used, can be improved.
Will be described in more detail.
7 is an enlarged plan view in the vicinity of the armrest 93 inside the cabin shown in Figs. 5 and 6. Fig.
5 and 7, the armrest main body 931 extends substantially in the gas longitudinal direction, and the front extended portion 934 extends in the gas width direction outer side And is inclined outward in the gas width direction as viewed in plan.
With the above configuration, the shift operating member 711 can be accessed in a natural posture in which the wrist is bent outward with respect to the arm with the palm facing inward, and the operability of the shift operating member 711 can be further improved .
7, the armrest main body 931 includes a central region 9311 located in the center in the gas longitudinal direction and a center region 9311 located between the central region 9311 and the forward extending portion 934 And a transition region 9312.
The gas widthwise outer side surface 9312a of the transition region 9312 is inclined inwardly in the gas width direction as viewed in plan so as to be located inside the gas width direction as it goes forward.
With this configuration, the wrist can be freely moved during operation of the speed change operation member 711, thereby further improving the operability of the speed change operation member 711.
The armrest 93 has a virtual surface A3 extending forward in the gas width direction outer side surface of the central region 9311 toward the gas width direction outer side surface 934a of the front extension portion 934, As shown in Fig.
With the above arrangement, when the arm of the manipulator is moved from the elbow to the hand when the shift operating member 711 is operated while the elbow is placed on the armrest main body 931, The shifting operation member 711 can be turned in a comfortable posture naturally in a flat state while the elbow is placed on the armrest body 931 so that the operability of the shift operating member 711 can be further improved .
Fig. 8 is an enlarged view of the rear portion of the cabin in the vicinity of the driver's seat shown in Figs. 5 and 6. Fig.
In the present embodiment, as shown in Fig. 8, the gas-width-direction outer side surface 934a of the front extension portion 934 is inclined upward (that is, positioned on the outer side in the gas- .
According to the above arrangement, since the palm is slightly downward when operating the shift operating member 711 while keeping the elbows in the armrest main body 931, the operation when the shift operating member 711 is operated with the fingertip So that the operability of the speed change operating member 711 can be further improved.
In addition, the upper surface 931a of the armrest main body 931 is an inclined surface which is lowered toward the inside in the gas width direction.
The shift operating member 711 is positioned above the upper surface 931a of the armrest main body 931 as shown in Fig.
With the above-described configuration, the shift operating member 711 can be operated in a stable posture in which the arm is mounted on the armrest main body 931.
5, 7, and 8, the speed change operating member 711 in the present embodiment is configured to be capable of continuously changing the speed of the continuously-variable transmission device 51 provided in the working vehicle 1 And is a dial type shift operating member.
Fig. 9 shows an internal perspective view of the armrest 93 in the present embodiment. 9 is a perspective view of the armrest 93 viewed from the side opposite to the driver's seat (on the side of the fender 91 on one side in the gas width direction) with respect to the gas width direction.
7 and 9, the speed change operation member 711 includes an operation shaft 7111 intersecting with the gas-width direction outer side surface 934a of the front extension 934, 7111, and a rotation operating portion 7112 mounted so as to be relatively non-rotatable. More specifically, the operating shaft 7111 is inclined so as to be located higher than the axis extending orthogonal to the gas-width-direction outer side surface 934a of the forward extending portion 934 toward the outside in the gas-tank width direction.
5, 7 and 8, on the upper surface 934b of the front extension portion 934, the maximum speed setting member 712 for setting the maximum speed output value of the continuously-variable transmission device 51 ).
7 and 9, the maximum speed setting member 712 is formed so as to extend from the upper surface 934b of the front extension portion 934 to the upper surface 934b of the armrest main body 931, An arm portion 7122 swingable around a swinging shaft 7121 substantially parallel to the swing arm 931a and a swing operation portion 7123 fixed to the distal end portion of the arm portion 7122. [
The speed change operation member 711 and the maximum speed setting member 712 forming the traveling system operating member 71 are respectively connected to the forward extension portion 934 of the armrest 93, And the operability of the traveling system operating member 71 can be improved while preventing the erroneous operation.
That is, the speed-change operating member 711 having a high frequency of use is disposed on the gas-width-direction outer side surface 934a of the forward extending portion 934 and the use speed of the maximum speed setting member 712 is relatively low The two operating members 711 and 712 forming the traveling system operating member 71 are disposed on the upper surface 934b of the forward extending portion 934 so that the forward extending (934). Therefore, it is possible to prevent the erroneous operation between the two operating members 711 and 712 while improving the operability by closely arranging the two operating members 711 and 712, and the speed change operating member 711, which is used frequently, So that the operability can be improved.
Fig. 10 is an enlarged right side view of the vicinity of the front extended portion 934 of the armrest 93 disposed inside the cabin shown in Figs. 5 to 7.
In the present embodiment, as shown in Fig. 10, a guard portion 9341 partially surrounding the periphery of the rotation operating portion 7112 is provided on the gas-widthwise outer side surface 934a of the front extension portion 934 .
The guard portion 9341 is provided at the rear lower portion of four spaces defined by a virtual vertical plane A4 and a virtual horizontal plane A5 passing through the operation shaft 7111 when viewed along the axis of the operation shaft 7111 And is configured to surround the rotation operating portion 7112 in a range of less than 180 degrees around the operating shaft 7111 from the center.
By having the above configuration, it is possible to effectively prevent the unintentional contact of the hand of the operator with the turning operation portion 7112 during operation of the maximum speed setting member 712, for example, while preventing deterioration in the operability of the turning operation portion 7112 .
In the present embodiment, as shown in Fig. 7 and Fig. 10, the forward extending portion 934 is formed with a raised portion 9342 protruding outward in the gas-width direction outward from the gas-widthwise outer side surface 934a, The elevating portion 9342 is provided with the speed change operating member 711. [
By having the above-described configuration, the turning operation portion 7112 of the speed change operation member 711 can be easily held, and the operability can be further improved.
In the present embodiment, the protruding portion 9342 is provided with the guard portion 9341.
The raised portion 9342 has a truncated cone shape. Further, the raised portion 9342 is provided in the vicinity of the front end portion of the forward extending portion 934. [
10, the guard portion 9341 in the present embodiment is provided in a space located in the rear and lower one of the four spaces defined by the virtual vertical plane A4 and the virtual horizontal plane A5 And has an approximately circular arc shape.
10, the upper surface 934b of the front extension portion 934 in the present embodiment is formed so as to extend along the pivot axis 7121 of the maximum speed setting member 712, 7121) and an approximately circular arc shape.
A guide hole 9343 is formed in the upper surface 934b of the forward extension portion 934 to allow rotation of the arm portion 7122 of the maximum speed setting member 712 around the pivot shaft 7121 have.
By having the above configuration, the maximum speed setting member 712 can be operated with the fingers along the surface of the front extension portion 934, so that the operability can be improved.
Fig. 11 shows an internal perspective view of the vicinity of the forward extension of the armrest 93 according to the present embodiment.
7, 10, and 11, the maximum speed setting member 712 in the present embodiment has a predetermined operating range (for example, a maximum operating range) provided at equal intervals within a predetermined rotating range around the swing shaft 7121, And a locking mechanism 7124 capable of locking the arm portion 7122 every time.
More specifically, the locking mechanism 7124 is a plate member 7125 fixed to the armrest plate 937 forming the armrest main body 931 and having a side surface perpendicular to the pivot shaft 7121 A plate member 7125 having a plurality of locking holes 7126 formed at regular intervals around the pivot shaft 7121 and an engaging member 7127 rotatable about the pivot shaft 7121 together with the arm portion 7122 And an engaging member 7127 having an engaging projection 7128 formed in a direction along the pivot shaft 7121 so as to face the locking hole 7126. [
The engaging member 7127 is directly or indirectly supported by the arm portion 7122 in a state in which the engaging projection 7128 can move back and forth along the pivot shaft 7121 and the engaging projection 7128 Biased in a direction approaching the plate member 7125 through an elastic member such as a spring.
Further, the arm portion 7122 is biased in a direction approaching the plate member 7125. [
Specifically, as shown in Fig. 11, a fastening member 7129 such as a nut is provided on the side of the pivot shaft 7121 opposite to the arm support portion with respect to the plate member 7125 of the pivot shaft 7121, And a biasing member 7130 constituted by a dish spring and a washer is fitted on the pivot shaft 7121 between the coupling member 7129 and the plate member 7125. [
The arm portion 7122 and the plate member 7125 are biased in the direction in which the arm member 7122 and the plate member 7125 are brought close to each other so that the biasing force of the engaging member 7125 is not strengthened, Can be reliably engaged with the locking hole 7126. [ Therefore, it is possible to reliably lock the maximum speed setting member 712 for each locking hole 7126 while lightening the operation feeling of the maximum speed setting member 712, thereby obtaining clear resolution.
Further, in this embodiment, the engaging member 7127 is detachable.
Therefore, when the maximum speed setting member 712 does not need locking at every predetermined resolution (for example, when stepless adjustment is adopted), the specification change can be easily performed by separating the engagement member 7127 .
Hereinafter, the structure of the operating portion arranged on the cabin 9 of the working vehicle 1 according to the present embodiment will be described.
5 and 6, the operating portion structure includes a lever guide 97 disposed on one side of the driver's seat 92 in the vehicle width direction (here, the right side in the traveling direction), a plurality of manipulating members operable for artificial manipulation, And has a rest 93.
The lever guide 97 is configured to extend over the fender 91 and a bottom member 94 extending between the driver's seat 92 and the fender 91 disposed at one side of the driver's seat 92 in the vehicle width direction have.
The armrest 93 is provided so that the armrest main body 931 on which the operator can place the arm is positioned above the lever guide 97 and in the middle of the width direction of the lever guide 97 Consists of.
At least one of the operating members is disposed inwardly and outwardly of the armrest body 931 in the widthwise direction of the body.
In the present embodiment, the working-machine lifting lever 72 is disposed on the inside of the armrest main body 931 in the widthwise direction of the base body and the working-machine setting operation panel 95 .
According to the above configuration, since at least one operating member is disposed on the inside and outside of the vehicle body width direction with the armrest main body 931 interposed therebetween, all of the plurality of operating members are arranged on the outside in the vehicle body width direction It is possible to effectively prevent unintentional erroneous operation as compared with the conventional configuration.
Fig. 12 shows a side view of the vicinity of the armrest 93 when viewed from the driver's seat toward the outside in the vehicle width direction. 12 shows a state in which the lever guide 97 is removed.
6 and 12, the armrest 93 is disposed between the driver's seat 92 and the fender 91 disposed on one side in the vehicle width direction of the driver's seat 92 And is supported by a bracket 932 installed on the bottom member 94 so as to be positioned in the gap. More specifically, the bracket 932 is installed on the second bottom member 942.
The armrest main body 931 is not connected to the seat portion of the driver's seat 92 so that only the seat portion of the driver's seat 92 can be separated without detaching the armrest 93 have.
Therefore, compared with the conventional armrest in which the armrest main body is supported on the seat portion of the driver's seat via the support member, the driver's seat can be flexibly changed in the specifications of the driver's seat (for example, the presence or absence of suspensions provided on the support portion of the seat portion, And it is possible to improve the efficiency of the desorption operation of the driver's seat.
5, 6 and 12, the working machine lifting lever 72 is provided between the driver's seat 92 and the fender 91 along the axis of rotation 721 along the gas- And is directly or indirectly supported on the bracket 932 so as to be rotatable around the bracket 932.
The armrest 93 is supported on the bracket 932 through an attachment plate 933 so that the armrest main body 931 is located on the outside of the machine tool lift lever 72 in the machine width direction.
6, the lever guide 97 allows the upper end, which is the operating part of the working machine lifting lever 72, and the upper end of the attaching plate 933 to extend upward while the bracket 932, Lt; / RTI >
As described above, in the present embodiment, the working-machine lifting / lowering lever 72, which requires a relatively large installation space to be rotated around the rotating shaft 721, uses the clearance between the driver's seat 92 and the fender 91 So that the operation portion structure can be made compact.
Further, since the armrest 93 and the working machine lifting lever 72 are supported by the single bracket 932, the supporting structure of both members can be simplified.
The bracket 932 may be fixed to the fender 91. Accordingly, the bracket 932 can be more stably supported.
In the present embodiment, the work posture setting member 73 is provided on the working machine setting operation panel 95 disposed outside the width direction of the armrest main body 931 as described above.
Fig. 13 is a plan view of a working machine setting operation panel in the operating section structure disposed inside the cabin in the present embodiment.
13, the working tiller depth setting member 735, the automatic control tilting setting member 732, and the tilting depth setting member 73 are provided as the working posture setting member 73 in the working machine setting operation panel 95 in this embodiment, The work machine elevating and positioning member 734, and the manual inclination setting member 733 are provided.
In the present embodiment, the downward movement cushion setting member 75 is also provided on the working machine setting operation panel 95.
The till depth setting member 735, the automatic control tilting setting member 732, the working machine elevating positioning member 734 and the downward cushion setting member 75 are provided on the upper surface of the working machine setting operation panel 95 And the manual inclination setting member 733 serves as a lever type operating member provided on the upper surface of the working machine setting operation panel 95. [
As shown in Figs. 5 and 6, the working machine setting operation panel 95 is provided on the lever guide 97 extending upwardly of the fender 91 on one side in the machine body width direction.
In the present embodiment, the working machine setting operation panel 95 integrally covers the automatic control inclination setting member 732, the working machine elevating position setting member 734 and the downward cushion setting member 75 And a lid member 951 having a lid. The setting member having a small frequency of use during the operation such as tillage can cover the lid with the lid member 951 to more effectively prevent the erroneous operation during the operation.
8, the upper end of the operation unit elevating lever 72 has an upper portion 931a of the armrest main body 931 extending inwardly in the gas width direction, (A1).
With the above configuration, it is possible to effectively prevent the erroneous operation of the work machine lifting lever 72 by abutting the operator's arm or the like unintentionally on the worker lifting lever 72 while improving the operability of the worker lifting lever 72 can do.
As shown in Fig. 8, the armrest main body 931 is an inclined surface in which the upper surface is lowered toward the inner side in the vehicle width direction.
With the above configuration, the operator can load the arm on the armrest main body 931 in a stable posture. Further, the operability of the operating member (the working-device lifting lever 72 in this embodiment) located on the inner side in the vehicle width direction than the armrest main body 931 in a state in which the arm is mounted on the armrest main body 931 Can be improved.
5 and 12, the armrest main body 931, the working machine elevating lever 72, and the working posture setting member 73 (the working machine setting operation panel 95) ] At least partly overlap with respect to the gas front and rear positions.
5 to 7, the armrest 93 includes a forward extension portion 731 extending forward from the armrest main body 931 so as to be located forward of the work posture setting member 73 934, and the forward operating portion 934 is provided with the shift operating member 711. [
With the above arrangement, in a state in which the arms are mounted on the armrest main body 931 while arranging the armrest main body 931, the working machine lifting lever 72, and the working posture setting member 73 compactly The speed change operating member 711, which is relatively frequently used, can be easily operated.
In this embodiment, as shown in Figs. 5 and 8, an imaginary rear surface A2 (the imaginary width direction inner side surface A1 and the imaginary width direction inner side surface A2) extending rearward from the upper surface 931a of the armrest main body 931 The PTO-type operating member 76 is provided on the upper surface of the lever guide 97 on the rear side of the armrest main body 931 so as to be positioned below the same side.
By having the above-described configuration, the PTO-system operating member 76 can be arranged compactly while preventing the erroneous operation to the PTO-system operating member 76.
In the present embodiment, the PTO output operating member 761 is a push button, and the PTO control switching member 762 is a mode selection dial. Further, the PTO output operating member 761 and the PTO control switching member 762 are disposed at approximately the same position in the gas front-rear direction. The PTO output operating member 761 is disposed on the outside of the PTO control switching member 762 in the vehicle width direction.
Hereinafter, the armrest 93 in the present embodiment will be described in more detail.
In the present embodiment, the armrest main body 931 is supported by the attachment plate 933 fixed to the bracket 932 as described above.
Fig. 14 is an enlarged view of the vicinity of the armrest body of the armrest 93 shown in Fig.
9 and 14, the attachment plate 933 includes a first attachment plate 935 fixed to the bracket 932, and a second attachment plate 935 fixed to the first attachment plate 935, And a second attachment plate 936 that is attached to the second attachment plate 936.
The armrest main body 931 is attached to the second attachment plate 936 so as to be positionally adjustable around a rotation axis 9373 along the gas width direction.
It is possible to adjust the relative position of the armrest main body 931 with respect to the driver's seat 92 in the gas front and rear direction and the relative position around the rotation shaft 9373, Can be easily adjusted to the physique of the driver and the work contents.
The armrest body 931 is positioned around the rotation shaft 9373 such that the free end of the armrest body 931 faces upward so that the armrest body 931 Can be effectively prevented from becoming an obstacle.
9 and 12, the bracket 932 in this embodiment includes a rod-like body 9321 formed by bending a flat plate member so as to have a U-shape in plan view, Shaped bottom member 9322 fixed to the bottom of the upper body 9321 and the lower member 9322 is fixed to the second bottom member 942. [ The bracket 932 is fixed in a state in which the lateral opening of the bar-shaped body 9321 is directed toward the first widthwise side of the gas-discharging body (the widthwise outer side of the body).
9 and 14, the first attachment plate 935 is fixed to the first widthwise side of the bracket 932 at the upper end of the bracket 932. [ The first attachment plate 935 is fixed to the side of the upper end of the bar-shaped body 9321 of the bracket 932 so as to cover the lateral opening of the bar-shaped body 9321 across the gas longitudinal direction. The first attachment plate 935 has a first side 9351 attached to the bracket 932 as a first side 9351 along the gas longitudinal direction and a second side 9352 extending substantially parallel to the first side 9351 The second side surface 9352 and the first side surface 9352 are arranged such that the second side surface 9352 is positioned on the first widthwise side of the first side surface 9351 And a flat plate-like connection portion 9353 connecting the second side surface 9352. [
The second attachment plate 936 has a side surface 9361 to which the first attachment plate 935 is attached and an upper surface 9362 extending from the upper end of the side surface 9361 to the first side in the gas width direction. The second attachment plate 936 is configured such that the side 9361 of the second attachment plate 936 is positioned on the second side 9352 of the first attachment plate 935 in the gas- Direction inner side) of the first attachment plate 935. As shown in Fig.
A hole 9354 for a fastening member 9364 such as a bolt is formed in either one of the first attachment plate 935 and the second attachment plate 936 and the first attachment plate 935 and the second attachment plate 936 An elongated hole 9363 extending in the gas longitudinal direction is formed at a position corresponding to the hole 9354 on the other side of the attachment plate 936. The hole 9354 and the elongated hole 9363 The first attachment plate 935 and the second attachment plate 936 are fixed by the fastening member 9364 in a state where the fastening member 9364 penetrates.
9 and 14, the hole 9354 is formed in the second side surface 9352 of the first attachment plate 935, and the elongated hole 9363 is formed in the second side surface 9352 of the first attachment plate 935. Further, 2 attachment plate 936, and the fastening members 9364 are supported and fixed in a state in which the fastening members 9364 pass through the gasket width direction.
When the second attachment plate 936 is adjusted in the forward and backward directions with respect to the first attachment plate 935 with respect to the first attachment plate 935, the coupling member 9364 is loosened to some extent, It is possible to move the second attachment plate 936 in the forward and backward directions with respect to the first attachment plate 935 so as to change the relative position of the coupling member 9364 in the first attachment plate 935.
Further, in the present embodiment, two holes 9354 are formed in the first attaching plate 935 along the gas longitudinal direction, and the second attaching plate 936 is provided with the holes 9354 along the gas longitudinal direction Two elongated holes 9363 are formed. The second attachment plate 936 can be adjusted in the gas front and rear direction with respect to the first attachment plate 935 while the angle of the upper surface 931a of the armrest main body 931 is kept constant.
9 and 14, the armrest main body 931 in this embodiment has a side surface 9371 extending substantially in the up-and-down direction and a side surface 9372 extending from the upper end of the side surface 9371 toward the first side in the gas- And an armrest plate 937 having an upper surface 9372 formed thereon.
The rotation axis 9373 is fixed to the side surface 9371 so as to extend from the side surface 9371 to the first side in the gas width direction.
The second attachment plate 936 is provided with a boss portion 9365 into which the rotation shaft 9373 is inserted and the rotation shaft 9373 is inserted from the second side in the width direction of the boss portion 9365 And the armrest main body 931 is detachably connected to the second attachment plate 936 by inserting it into the boss portion 9365.
By having the above configuration, the armrest body 931 of another specification can be attached to the second attachment plate 936 without changing the bracket 932, the first attachment plate 935 and the second attachment plate 936 ). For example, one armrest body provided with the operating member without changing the bracket 932, the first attaching plate 935, and the second attaching plate 936, and the other armrest body without the operating member The armrest main body can be selectively mounted on the second attachment plate 936. [
Further, the armrest plate 937 may have a second side extending downward from the first side end of the upper surface 9372 in the gas-width direction.
9 and 14, the rotary shaft 9373 is fixed to the vicinity of the rear end of the armrest plate 937, and the boss 9365 is fixed to the second attachment plate 933. [ And the rear end portion of the rear end portion 936 is also fixed to the upper end portion.
A fixing member 9375 such as a nut is attached to the first side end portion of the rotating shaft 9373 in the gas width direction with the rotating shaft 9373 passed through the boss portion 9365.
An elastic member 9376 for biasing the rotation shaft 9373 toward the first widthwise side of the body through the fixing member 9375 is provided between the boss unit 9365 and the fixing member 9375 A plate spring and a washer).
The bosses 9365 of the second attachment plate 936 are pressed against the side surface 9371 of the armrest plate 937 with elasticity. That is, the armrest main body 931 is rotatable about the rotation shaft 9373 in a state of having frictional resistance. Therefore, even if the armrest main body 931 is rotated around the rotation shaft 9373 and the hand is released from the armrest main body 931 during the rotation, the armrest main body 931 suddenly falls down, It is possible to effectively prevent the operation member 711 and the maximum speed setting member 712 from impacting. In addition, the armrest main body 931 can be held at a predetermined rotation position by the elastic force of the elastic member 9376. [
The rear end side of the upper surface 9372 of the armrest plate 937 and the rear end side of the side surface 9361 of the second attachment plate 936 come into contact with each other, The upper surface 9372 of the armrest plate 937 and the upper surface 9362 of the second attachment plate 936 are in contact with each other so that the armrest body 931 Is regulated around the rotation axis 9373 on the other side.
A cushion member 9366 capable of coming into contact with the upper surface 9372 of the armrest plate 937 from below is attached to the gas front portion of the upper surface 9362 of the second attachment plate 936 . More specifically, the cushion member 9366 is made of a member having elasticity such as rubber and is fixed in a state of being engaged with an engagement hole 9367 formed on the upper surface 9362 of the second attachment plate 936 have.
The cushion member 9366 is brought into contact with the armrest plate 937 in the use state in which the arm is placed on the armrest main body 931. Therefore, The armrest plate 927 is stably supported by the boss portion 9265 without being shaken from side to side with respect to the second attachment plate 936. [ Therefore, the armrest body 931 can be stably supported in a state of use while allowing the armrest body 931 to rotate around the rotation shaft 9373. [
It is also possible to prevent direct contact of the armrest body 931 with the armrest plate 937 to prevent the occurrence of impact noise at the time of contact while preventing the shift operation member 711 and the maximum speed setting member 712 Can be prevented from being impacted.
In this embodiment, the armrest main body 931 has an armrest cover 938 fixed to the upper surface 9372 of the armrest plate 937 as shown in Figs.
A non-skid member 9381 made of rubber is attached to the upper surface of the armrest cover 938. The non-skid member 9381 forms an upper surface 931a of the armrest body 931. [ 9 and Fig. 14, the nonslip member 9381 is shown, but the illustration of the armrest cover 938 is omitted.
As shown in Figs. 7 and 10, the armrest cover 938 has an upper cover 938a and a lower cover 938b which are vertically divided into two by the raised portion 9342. [
In this embodiment, as shown in Fig. 12, the working machine lifting lever 72 is directly or indirectly fixed to the bracket 932 on one side of the bracket 932 in the forward and backward directions of the base (front side in this embodiment) Indirectly supported.
The control device 8 is disposed on the other side of the bracket 932 in the front and rear direction of the base body (rear side in this embodiment), and the control device 8 is surrounded by the lever guide 97.
With the above configuration, the control device 8 can be efficiently arranged using the gap between the driver's seat 92 and the fender 91. Especially, in the case of the present embodiment in which the operating member is provided on the lever guide 97 and the armrest 93, the wiring between the operating member and the control device 8 can be efficiently performed.
Further, the control device 8 may be fixed to the fender 91, or may be directly or indirectly supported by the bracket 932.
The control unit 8 is electrically connected to the operating member provided on the armrest 93 in a space formed by the armrest cover 928 and the upper surface 9372 of the armrest plate 927 The wiring to be connected can be penetrated.
5, the second bottom member 942 between the driver's seat 92 and the fender at the other side (left side) of the vehicle width direction is provided with a first floor member 942 for operating the auxiliary transmission device 53 (Auxiliary shift lever) 77 is erected upwardly.
5 and 6, the PTO speed change operation member 78 for operating the PTO transmission device 59 is disposed in front of the sub-speed change operation member 77, 941) and the second bottom member (942).
The forward / backward switching operation member 79 for operating the forward / backward switching device 52 is provided on the other side of the steering column 96 in the vehicle width direction provided in front of the driver's seat 92.
Further, the working unit vertical operation member 74 is provided on one side of the steering column 96 in the gas width direction.
The main clutch pedal 70 for turning on / off the main clutch (the forward / backward switching device 52) is provided on the other side in the vehicle width direction in front of the driver's seat 92.
Embodiment 2
Hereinafter, another embodiment of the present invention will be described with reference to the accompanying drawings.
First, a working vehicle to which the present invention can be applied will be described.
Figs. 15 to 17 show a side view, an electric transmission diagram, and a hydraulic circuit diagram of the tractor, which is an example of the working vehicle, respectively.
15 to 17, the working vehicle 2001 includes a vehicle frame 2002, an engine 2003 supported by the vehicle frame 2002, and an electric motor (not shown) A pair of front wheels 2005 and a pair of rear wheels 2006 respectively disposed in the front and rear direction of the vehicle and a pair of rear wheels 2006 that are operatively driven by rotational power from the transmission 2004, And the like.
In the working vehicle 2001, the pair of rear wheels 2006 serves as a main drive wheel operatively driven by a rotational power from the transmission 2004, and the pair of front wheels 2005 And serves as a subordinate drive wheel which is selectively driven by the rotational power from the transmission 2004 while acting as a steering wheel.
15 and 16, the transmission 20044 includes an input shaft 2041 that is operatively connected to the engine 2002, and an input shaft 2041 that is connected to the input shaft 2041 via the rear wheel 2006 and the sub- And a PTO shaft 2035 for outputting a rotational power toward the working machine 2010. The PTO shaft 2035 is connected to the input shaft 2041 and the front wheel 2005, A power transmission mechanism 2020 for supporting the input shaft 2041 and the PTO shaft 2035 and a power transmission mechanism 2020 for supporting the input shaft 2041 and the PTO shaft 2035, And a transmission case 2040 for accommodating the power transmission mechanism 2030.
16, the traveling system transmission mechanism 2020 includes a transmission mechanism that changes the rotational speed and rotational direction of the rotational power from the input shaft 2041, A main driving wheel side 2024 for alternately outputting a rotational power from the driving driving shaft 2024 toward the pair of rear wheels 2006 serving as a main driving wheel, A differential gear device 2025 and a subordinate drive wheel output device 2026 capable of outputting the rotational power from the drive drive shaft 2024 toward the pair of front wheels 2005 serving as a subordinate drive wheel.
16, the transmission mechanism includes a continuously-variable shifting device 2021 functioning as a main speed shift device, a continuously variable transmission device 2021 for rotating the driving drive shaft 2024 with respect to the rotational direction of the input shaft 2041, A forward-reverse switching device 2022 capable of switching the direction, and a multistage transmission device 2023 serving as a secondary transmission device.
In the present embodiment, the continuously-variable transmission device 2021 is an HST.
16, the continuously-variable shifting device 2021 includes a pump shaft 2211 operatively connected to the input shaft, a hydraulic pump main body 2211 rotationally driven by the pump shaft 2211, A hydraulic motor main body 2214 fluidically driven by the hydraulic pump main body 2212; a motor shaft 2213 rotationally driven to be actuated by the hydraulic motor main body 2214; And an output adjusting mechanism (2215) capable of changing the volume of at least one of the hydraulic pump main body (2212) and the hydraulic motor main body (2214).
In the present embodiment, as shown in Fig. 16, the HST is of an in-line type in which the pump shaft 2211 and the motor shaft 2213 are coaxially arranged.
In the present embodiment, the output adjusting mechanism 2215 is operated by an electric motor or an HST electric actuator 2510 (see FIG. 18) in the form of a combination of an electromagnetic valve and a hydraulic actuator.
That is, the work vehicle 2001 further includes the HST electric actuator 2510 and a control device 2400 for controlling the operation of the electric actuator 2510 for HST.
Fig. 18 shows a system block diagram of the control device 2400. As shown in Fig.
As shown in Fig. 18, the control device 2400 controls the operation of the HST electric actuator 2510 in accordance with an artificial operation of a shift operating member 2410, which will be described later.
In the present embodiment, the forward-reverse switching device 2022 is disposed on the downstream side of the continuously-variable transmission device 2021 with respect to the transmission direction as shown in Fig.
The forward / backward switching device 2022 is configured to be able to switch the rotational direction of the rotational power input from the motor shaft 2213 in the forward rotation direction or the reverse rotation direction and transmit the rotation to the traveling intermediate shaft 2027.
Specifically, the forward / backward switching device 2022 includes a forward gear train 2022F for transmitting rotational power from the motor shaft 2213 to the traveling intermediate shaft 2027 in the normal rotation direction, A reverse rotation dedicated gear train 2022R for transmitting rotation power from the transmission side intermediate shaft 2023 to the traveling intermediate shaft 2027 in the reverse rotation direction and a reverse rotation dedicated gear train 2022R for transmitting rotation power from the reverse rotation dedicated gear train 2022F to the traveling intermediate shaft 2027, And a forward / backward clutch mechanism 2220 for switching the state.
The forward and reverse clutch mechanism 2220 includes a forward dedicated clutch 2220F for transmitting power from the motor shaft 2213 to the traveling intermediate shaft 2027 through the forward dedicated gear train 2022F, And a reverse clutch dedicated clutch 2220R for transmitting the rotational power from the motor shaft 2213 to the traveling intermediate shaft 2027 through a row 2022R.
As shown in Fig. 18, the front and rear clutch mechanism 2220 is constituted by an electric actuator 2520 for forward and rearward movement controlled by the control device 2400 in accordance with an artificial operation to the forward / backward switching operation member 2411 .
In the present embodiment, the forward-reverse clutch mechanism 2220 is in the form of a hydraulic clutch as shown in Fig.
17, the electric actuator 2520 for forward and backward rotation includes a forward solenoid solenoid valve 2520F for switching the supply of hydraulic oil from the hydraulic pressure source to the forward rotation dedicated clutch 2220F, And a reverse solenoid-operated solenoid valve 2520R for switching the supply and discharge of working oil to the exclusive clutch 2220R.
18, the control device 2400 controls the position of the forward-only solenoid valve 2520F and the reverse-reverse solenoid valve 2520R in accordance with the artificial operation of the forward / backward switching operation member 2411 I do.
Preferably, when the forward / backward switching operation member 2411 is positioned at the neutral position, the control device 2400 controls the both of the forward operation dedicated hydraulic clutch 2220F and the reverse rotation dedicated hydraulic clutch 2220R to be in a power cut- The position control of the forward solenoid solenoid valve 2520F and the reverse solenoid solenoid valve 2520R is performed.
Further, the forward / backward switching operation member 2411 may be separate from the speed change operation member 2410, or may be integrally formed.
In the present embodiment, the multi-stage shift device 2023 is disposed on the downstream side of the forward-reverse switching device 2022 with respect to the transmission direction, as shown in Fig.
The multistage transmission device 2023 is configured to transmit the rotational power of the traveling intermediate shaft 2027 to the driving driving shaft 2024 in a multi-stage shift.
In the present embodiment, the multi-stage shift device 2023 includes a high-speed gear train 2023H for rotating the traveling drive shaft 2024 at a high speed, a low-speed gear train 2023B for rotating the traveling drive shaft 2024 at low speed, And a high-low speed switching clutch 2230 for selectively turning the high-speed gear train 2023H or the low-speed gear train 2023L into a transmission state.
The high-low-speed switching clutch 2230 is operated by an electric motor or a high-low-speed switching electric actuator 2530 in the form of a combination of a solenoid valve and a hydraulic actuator as shown in Fig.
The high-low-speed switching electric actuator 2530 is actuated by the control device 2400 in accordance with an artificial operation to the high-low-speed switching operation member 2420.
The subordinate drive wheel output device 2026 is configured to selectively output rotational power from the drive drive shaft 2024 toward the subordinate drive wheel.
More specifically, the subordinate drive wheel output device 2026 includes a subordinate drive wheel output shaft 2265 for outputting rotational power to the subordinate drive wheels, and a subordinate drive wheel 2265 interposed between the drive drive shaft 2024 and the subordinate drive wheel output shaft 2265. [ And has a clutch mechanism 2260 for a clutch.
In the present embodiment, the subordinate drive wheel output device 2026 includes a two-wheel drive state in which power transmission to the subordinate drive wheels is blocked, and a constant speed 4 Wheel drive state and a speed-increasing four-wheel drive state in which the subordinate drive wheel is driven at a higher rotation speed than the main drive wheel.
More specifically, the subordinate drive wheel output device 2026 includes the subordinate drive wheel output shaft 2265 in addition to the subordinate drive wheel output shaft 2265 and the subordinate drive wheel clutch mechanism 2260, Speed gear train 2261L for synchronously rotating the auxiliary drive wheel 2265 and a speed increase gear train 2261H for accelerating and rotating the sub drive wheel output shaft 2265 over the drive drive shaft 2024. [
The subordinate drive clutch mechanism 2260 includes an equal-speed clutch 2260L for selectively causing the constant-speed gear train 2261L to transmit a power transmission state, and a clutch mechanism 2260L for selectively driving the speed increasing gear train 2261H in a power transmission state And a speed increasing clutch 2260H.
As shown in Fig. 18, the constant-speed clutch 2260L and the speed-increasing clutch 2260H are operated by a two-wheel-drive / four-wheel-drive switching electric actuator 2540.
In the present embodiment, the subordinate drive clutch mechanism 2260 is in the form of a hydraulic clutch.
17, the two-wheel drive / four-wheel drive switching electric actuator 2540 is provided with a constant velocity solenoid valve 2540L for switching the supply and discharge of the working oil from the hydraulic pressure source to the constant velocity clutch 2260L, And a speed increasing solenoid valve 2540H for switching the supply and discharge of hydraulic oil from the hydraulic pressure source to the speed increasing clutch 2260H.
18, the control device 2400 includes a two-wheel drive / four-wheel drive switching operation member 2430 and the constant velocity solenoid valve 2540L and the constant velocity solenoid valve 2540L in accordance with the steering angle of the working vehicle 2001, The position control of the speed increasing solenoid valve 2540H is performed.
Specifically, the two-wheel drive / four-wheel drive switching operating member 2430 is configured to be capable of taking two-wheel drive position, four-wheel drive position, and four-wheel drive increase position.
If it is determined that the two-wheel drive / four-wheel drive switching operation member 2430 is located at the two-wheel drive position based on a signal from the two-wheel drive / four-wheel drive switching operation side sensor 2431, The apparatus 2400 operates both the constant velocity solenoid valve 2540L and the speed increasing solenoid valve 2540H such that both the constant velocity hydraulic clutch 2260L and the speed increasing hydraulic clutch 2260H are in a power cut off state.
If it is determined that the two-wheel drive / four-wheel drive switching operation member 2430 is located at the four-wheel drive position based on a signal from the two-wheel drive / four-wheel drive switching operation side sensor 2431, The control device 2400 controls the constant velocity solenoid valve 2540L and the speed increasing solenoid valve 2540H so that the constant velocity hydraulic clutch 2260L is in the power transmitting state and the speed increasing hydraulic clutch 2260H is in the power cut state. ).
On the other hand, if it is determined that the two-wheel drive / four-wheel drive switching operation member 2430 is located at the four-wheel drive acceleration position based on the signal from the two-wheel drive / four-wheel drive switching operation side sensor 2431, The control device 2400 causes the constant speed hydraulic clutch 2260L to be in a power transmitting state when the vehicle is running straight forward and the speed increasing hydraulic clutch 2260H when the vehicle is turning on the basis of a signal from the steering angle sensor 2571, The solenoid-operated solenoid valve 2560L and the solenoid-operated speed-increasing solenoid valve 2540H are operated so as to be in the power transmitting state.
16, the PTO transmission mechanism 2030 includes a PTO clutch device 2031 for selectively engaging or disengaging power transmission from the input shaft 2041 to the PTO shaft 2035, And a PTO multi-stage transmission device 2032 for multi-stage shifting the rotational power transmitted from the sun gear 2041 to the PTO shaft 2035.
The PTO clutch device 2031 includes a drive side member 2311 operatively connected to the input shaft 2041, a driven side member 2312 operatively connected to the PTO shaft 2035, And a PTO clutch mechanism 2313 for selectively engaging or disengaging the power transmission to the driven side member 2312. [
The PTO clutch mechanism 2313 includes a PTO electric actuator 2550 which is controlled by the control device 2400 in accordance with an artificial operation on the PTO on / off operation member 2440 .
In the present embodiment, the PTO clutch mechanism 2313 is in the form of a hydraulic clutch as shown in Fig.
17, the PTO electric actuator 2550 is in the form of a PTO on / off solenoid valve for switching the supply / discharge of the operating oil from the oil pressure source to the PTO clutch mechanism 2313. [
The control device 2400 controls the position of the PTO on / off solenoid valve 2550 according to the manipulation of the PTO on / off operating member 2440.
16 and 17, the PTO clutch device 2031 operates in a hybrid manner with respect to the PTO clutch mechanism 2313 to apply the braking force to the driven side member 2312 And a PTO brake mechanism 2314 for adding a PTO brake mechanism.
In the present embodiment, the PTO multi-stage shift device 32 is disposed on the downstream side of the PTO clutch device 31 with respect to the power transmitting direction as shown in Fig.
More specifically, the PTO multi-stage shift device 2032 includes a PTO transmission shaft 2321 operatively connected to the driven side member 2312 of the PTO clutch device 2031, A plurality of PTO transmission gear trains 2323 for transmitting rotational power from the PTO transmission shaft 2321 to the PTO transmission shaft 2322 at different speed change ratios and a plurality of PTO transmission gear trains 2323 And a PTO shift clutch member 2324 for selectively putting any one of the PTO shift gear train in the power transmitting state.
15 to 17, the working vehicle 2001 further includes a power steering hydraulic operating mechanism 2270 for steering the pair of steering wheels (in the present embodiment, the front wheels 2005) A hydraulic pressure raising mechanism 2275 for raising and lowering the working machine 2010, a hydraulic ramping mechanism 2280 for changing the horizontal posture of the machine main body (main machine) of the working machine 2010, A first auxiliary pump 2285 serving as a hydraulic source of the hydraulic PTO clutch mechanism 2313 and a hydraulic operating mechanism 2270 for steering, a forward / backward hydraulic clutch mechanism 2220, a hydraulic clutch mechanism for the subordinate drive wheel 2260, And a second auxiliary pump 2290 functioning as a hydraulic pressure source for the hydraulic pressure elevating mechanism 2275 and the hydraulic ramping mechanism 2280.
15 and 17, the hydraulic lifting mechanism 2275 includes a cylinder case 2276 mounted on the upper surface of the transmission case 2040, and a cylinder case 2276 housed in the cylinder case 2276 so as to be reciprocated A pair of right and left pairs of left and right pivots supported by the cylinder case 2276 so as to swing around a rotation axis 2278 along the vehicle width direction in response to reciprocating motion of the lifting piston 2277 The lift arms 2278L and 2278R of the first embodiment.
The free ends of the pair of left and right lift arms 2278L and 2278R are operatively connected to the working machine 2010 through a pair of left and right lift rods 2279L and 2279R as shown in Fig.
Specifically, as shown in Fig. 15, the working machine 2010 is laid on the main body of the vehicle through the top link 2011 and a pair of left and right lower links 2012L and 2012R.
One end of the top link 2011 is rotatably connected to the main body of the vehicle and the other end of the top link 2011 is rotatably connected to the working machine 2010.
One end of the left and right lower links 2012L and 2012R is rotatably connected to the main unit of the vehicle and the other end of the lower links is rotatably connected to the working machine 2010. [
The pair of right and left lift rods 2279L and 2279R are rotatably connected to the free ends of the left and right pair of lift arms 2278L and 2278R and the lower ends thereof are connected to the right and left pair of left and right lower links 2012L , And 2012R).
As shown in Fig. 18, the hydraulic lift mechanism 2275 is operated and controlled by the control device 2400 in accordance with the operation of the work machine lift lever 2450 and the work machine lift switch 2460.
17 and 18, the working vehicle 2001 switches the supply / discharge of working oil from the second auxiliary pump 2290 serving as a hydraulic pressure source to the hydraulic lifting mechanism 2275 Elevating valve 2560 and the control device 2400 controls the operation of the electron elevating valve 2560 in accordance with the operation of the elevator lever 2450 and the elevator switch 2460, Thus, the hydraulic lifting mechanism 2275 operates.
The hydraulic ramping mechanism 2280 is fitted to one of the pair of left and right lift rods 2279L and 2279R and is expanded and contracted under the control of the supply and demand of the operating oil so that the horizontal position of the working machine 2010 And the like.
17, the hydraulic ramping mechanism 2280 includes a light cylinder 2281 and a light-weighting piston 2282 housed in the light cylinder 2281 so as to reciprocate have.
As shown in Fig. 18, the hydraulic tilting mechanism 2280 is operated and controlled by the control device 2400 in accordance with the operation of the operation device tilting operation member 2470.
17, the working vehicle 2001 is provided with a light emitting element 2230 for switching the supply and discharge of the working oil from the second auxiliary pump 2290 serving as the oil pressure source to the hydraulic gradient device 2280, Valve 2565 and the control device 2400 controls the operation of the light-use solenoid valve 2565 in accordance with the operation of the operation panel inclining operation member 2470. Thus, the hydraulic lift mechanism 2280 operate.
Here, the control structure of the control device 2400 will be described.
First, the traveling system control structure of the control device 2400 will be described.
18, the work vehicle 2001 includes the shift operating member 2410 for operating the HST 2021 and a shift operating side sensor (not shown) for detecting the operating state of the shift operating member 2410 An HST electric actuator 2510 for operating the output adjusting member 2215 of the HST 2021 and a transmission operating side sensor 2511 for detecting the operating state of the output adjusting member 2215 Respectively.
In this embodiment, the speed change operation member 2410 includes a main speed change operating member 2410a and a speed adjusting member 2410b, which can be artificially operated independently, as shown in Fig.
The speed change operation side sensor 2415 is provided with a main speed sensor 2415a and a speed adjustment operation side sensor 2415b for detecting the operating states of the main speed change operating member 2410a and the speed adjusting member 2410b .
The main speed change operating member 2410a is a member for setting a speed change ratio by the HST 2021. [
On the other hand, the speed adjusting member 2041b sets the output speed of the HST 2021 to be the maximum speed output while setting the output speed of the HST 2021 to the maximum speed output based on the speed ratio set by the main speed change operating member 2410a .
Thus, the speed change stage of the output speed of the HST 2021 can be subdivided by including the main speed change operating member 2410a and the speed adjusting member 2410b as the speed change operation member 2410. [
The control device 2400 controls the HST electric actuator 2510 so that the actual output speed of the HST 2021 becomes the target output speed set by the main speed change operating member 2410a and the speed adjusting member 2410b. ).
The control device 2400 includes the transmission operating side sensor 2511 for detecting the operating state of the HST electric actuator 2510, the output adjusting side sensor 2511 for detecting the operating state of the output adjusting member 2215 The actual output speed of the HST 2021 is recognized based on the HST output sensor 2513 for detecting the rotation speed of the motor shaft 2213 and /
18, the working vehicle 1 further includes the forward / backward switching operation member 411 for operating the forward / backward switching device 22, And a forward / backward switching operation side sensor 521 for detecting the operating state of the forward / backward switching device 22. The forward / backward switching operation side sensor 412 detects the forward / .
Specifically, when the controller 2400 determines that the forward / backward switching operation member 2411 is positioned on the forward side and the reverse side based on a signal from the forward / backward switching operation side sensor 2412, The switching device 2022 operates the forward and rearward electric actuators 2520 so that the switching devices 2022 are in the forward and forward electric power states and the forward and backward switching operation is performed based on the signals from the forward and backward switching operation side sensors 2412, When the operating member 2411 is determined to be in the neutral position, the electric actuator 2520 for the forward and rearward operation is operated so that the forward-reverse switching device 2022 is in the power cut-off state.
Further, the forward / backward switching operation side sensor 2521 may include a sensor for detecting the operating state of the electric actuator 2520 for forward / backward movement and / or a sensor for detecting the rotational direction of the driven side of the forward / backward switching device 2022 .
18, the working vehicle 2001 also includes the high-low-speed switching operation member 2420 for operating the multi-stage shift device 2023, the operation state of the high-low speed switching operation member 2420 Speed switching operation side sensor 2425 for detecting the operating state of the high speed low speed switching device 2023 and the high speed low speed switching operation side sensor 2425 for detecting the high speed low speed switching operation side sensor 2425, .
It is also possible to operatively connect the high-low speed switching operation member 2420 and the shifter of the multi-stage shift device 2023 through a mechanical link mechanism instead of such a configuration.
17 and 18, the working vehicle 2001 further includes a steering member 2485 such as a steering wheel for steering the steered tire wheel (the front wheel 2005 in the present embodiment) A steering operation side sensor 2486 for detecting the operating state of the steering member 2485, a hydraulic operating mechanism 2270 for power steering, and a power source for supplying hydraulic power from the hydraulic source to the power steering hydraulic operating mechanism 2270 And a steering angle sensor 2571 for detecting the steering angle of the working vehicle 2001. The steering angle sensor 2571 detects the steering angle of the working vehicle 2001,
The control device 2400 controls the operation of the working vehicle 2001 based on signals from the steering operation sensor 2486 and the steering angle sensor 2571 so that the power The steering solenoid valve 2570 is operated.
18, the working vehicle 2001 further includes the two-wheel-drive / four-wheel-drive switching and operating member 2430 for operating the sub-drive wheel output device 2026 and the two- The two-wheel drive / four-wheel drive switching operation side sensor 2431 that detects the operation state of the wheel drive switching operation member 2430, the two-wheel drive / four-wheel drive switching electric actuator 2540, And a subordinate drive wheel output switching operation side sensor 2541 for detecting the operation state of the drive wheel output device 2026. [
Next, the PTO system control structure in the control device 2400 will be described.
18, the work vehicle 2001 includes the PTO on / off operation member 2440 for engaging or disengaging the power transmission state from the engine 2002 to the PTO shaft 2035, A PTO on / off operation side sensor 2441 for detecting the operating state of the PTO on / off operating member 2440, and an operation state detecting unit 2400 for detecting the operating state of the PTO electric actuator 2550 and the PTO clutch mechanism 2313 And a PTO operation side sensor 2551.
The control device 2400 operates the PTO electric actuator 2550 so that the PTO clutch mechanism 2313 is placed in the power transmitting state or the power interrupted state in accordance with the manipulation of the PTO on / off operating member 2440 .
The PTO operation side sensor 2551 may be a sensor for detecting the presence or absence of rotation of the driven side member 2312 of the PTO clutch device 2031, for example.
The work vehicle 2001 further includes a PTO drive mode switching operation member 2445 for switching the drive mode of the PTO drive shaft 2035 and a PTO drive mode switching operation member 2445 for switching the drive mode of the PTO drive mode switching operation member 2445, And a drive mode sensor 2446.
The PTO drive mode switching operation member 2445 is a member for switching the operation control mode of the PTO clutch mechanism 2313 by the control device 2400. [
Specifically, the PTO drive mode switching operating member 2445 is configured to be capable of taking an interlocking position, an independent position, and an elevating / interlocking position.
The control device 2400 controls the PTO clutch mechanism 2313 in accordance with the operating state of the PTO on / off operating member 2440. In this state, the PTO operating mode switching operation member 2445 is in the interlocking position, The operation of the PTO clutch mechanism 2550 is performed regardless of the operation state of the PTO on / off operation member 2440 when the traveling system electric path is in the power cut-off state while operating the PTO electric actuator 2550 so that the power state of the PTO on- 2313 are forced to be in the power cut-off state by operating the PTO electric actuator 2550.
When the PTO drive mode switching operation member 2445 is positioned at the independent position, the control device 2400 controls the PTO on / off operation member 2440, regardless of the power transmission state of the traveling system electric path, The PTO electric actuator 2550 is operated so that the transmission state of the PTO clutch mechanism 2313 is switched according to the operating state of the PTO.
The control device 2400 controls the PTO clutch mechanism 2313 in accordance with the operation state of the PTO on / off operating member 2440 when the PTO drive mode switching operating member 2445 is in the up / Off operation member 2440 when the working machine 2010 is lifted to the predetermined raised position by the hydraulic lifting mechanism 2275 while operating the PTO electric actuator 2550 so that the power state of the PTO on- The PTO electric actuator 2550 is operated so that the PTO clutch mechanism 2313 is forcibly brought into the power cut-off state.
Next, the structure of the working machine posture control in the control device 2400 will be described.
18, the work vehicle 2001 includes the working-machine lifting / lowering lever 2450 for lifting / lowering the working machine 2010 to an arbitrary height, and a working machine for detecting the operating state of the working-machine lifting / An elevating operation side sensor 2451, the hydraulic elevating mechanism 2275, the electronic elevating valve 2560 and a working machine elevating operation side sensor 2561 for detecting the height of the working machine 2010. [
The controller 2400 controls the operation of the worker lifting operation side sensor 2451 and the worker lifting operation side sensor 2561 so that the worker 2010 is positioned at a height corresponding to the artificial operation of the worker lifting lever 2450 And controls the operation of the electron lift-up valve 2560 based on the signal.
The working machine lifting operation side sensor 2561 may be a sensor for detecting the operating state of the hydraulic lifting mechanism 2275 (e.g., the swinging angle of the lift arms 2278L and 2278R around the rotating shaft 278) .
The work vehicle 2001 further includes a work machine lifting switch 2460 including a lifting switch 2460U and a lifting switch 2460D for lifting and lowering the work machine 2010 to and from a predetermined lifting position An ascending position setting member 2455 for setting the ascending position, an ascending position sensor 2456 for detecting the operating state of the ascending position setting member 2455, and a descending position setting member 2458 for setting the descending position And a lowering position sensor for detecting the operating state of the lowering position setting member 2458.
When the up switch 2460U is operated, the control device 2400 controls the up position sensor 2456 and the up / down position sensor 2455 so that the work machine 2010 is raised to the up position set by the up / And controls the operation of the electron lift-up valve 2560 based on a signal from the operation-side sensor 2561.
Similarly, when the lowering switch 2460D is operated, the control device 2400 controls the lowering position sensor and the elevating operation of the working machine so that the working machine 2010 is lowered to the lowering position set by the lowering position setting member 2458 And controls the operation of the electronic lifting valve 2560 based on a signal from the side sensor 2561.
Further, in the present embodiment, the working machine lifting lever 2450 is also configured to function as the lifting position setting member 2458 as well.
Therefore, the above-mentioned working machine lifting operation side sensor 2451 is also used as the lowered position sensor.
The work vehicle 2001 includes a lowering speed changing position setting member 2465 for setting a height for changing the lowering speed when lowering the working machine 2010, And a lowering speed changing position operation side sensor 2466 for detecting an operation state.
The control device 2400 controls the operation of the work machine 2010 up to the height set by the descending speed changing position setting member 2465 when descending the working machine 2010 according to the operation of the working machine lifting lever 2450 or the lowering switch 2460D The operation control of the electron elevating valve 2560 is performed so that the working machine 2010 descends at a basic speed and the working machine 2010 descends to a target lowering speed at a speed lower than the basic speed in an area lower than the basic speed.
The working vehicle 2001 further includes a working machine tilting operation member 2470, a working machine tilting operation side sensor 2471 for detecting the operation state of the working machine tilting operating member 2470, a hydraulic tilting mechanism 2280, A light-use solenoid valve 2565, and a tilting angle sensor 2566 for detecting the tilting angle of the working machine 2010.
In the present embodiment, the working machine inclination operating member 2470 includes an inclination setting member 2470a for setting the inclination angle of the working machine 2010 in the left and right direction with respect to the main body of the vehicle, An automatic tilt adjusting mode selecting member 2470b for automatically selecting an automatic tilt adjusting mode for automatically adjusting the direction tilt angle to the tilt angle set by the tilt setting member 2470a, And has a manual tilt operating member 2470c for arbitrarily changing it.
Therefore, the working machine tilting operation side sensor 2471 includes an automatic tilting operation side sensor 2471a for detecting the operation state of the tilt setting member 2470a, and a manual tilting operation side sensor 2471a for detecting the operation state of the manual tilting operation member 2470c. And a tilt operation side sensor 2471c.
When the automatic tilting adjustment mode is selected, the control device 2400 controls the automatic tilting operation side sensor 2471a and the automatic tilting operation side sensor 2471a so that the tilting angle of the work machine 2010 in the left / right direction is an inclination angle set by the tilt setting member 2470a. And controls the operation of the light-use solenoid valve 2565 based on the signal from the tilt angle sensor 2566.
When the manual tilting operation member 2470c is operated, the control device 2400 controls the operation of the manual tilting operation side 2470c so that the tilting angle of the working machine 2010 in the lateral direction is an inclination angle set by the manual tilting operation member 2470c And controls the operation of the light-use solenoid valve 2565 based on the signal from the sensor 2471c and the inclination angle sensor 2566. [
When the tiller is used as the working machine 2010, the working vehicle 2001 also includes a tilling depth setting member 2480 for setting the till depth by the tiller, A tiller depth operating-side sensor 2481 for detecting the tiller depth of the tilling device, a tiller depth operating-side sensor 2481 for detecting an operating state of the tilling device, a tiller depth driving electric actuator 2580 for changing the depth of tillage of the tilling device, 2581).
Here, the armrest unit 2600 provided in the working vehicle 2001 will be described.
Fig. 19 is a transverse plan view in the vicinity of the driver's seat 2050 taken along line XIX-XIX in Fig. 15. Fig.
As shown in Fig. 19, the armrest unit 2600 is disposed at one side of the driver's seat 2050 of the working vehicle 2001. As shown in Fig.
20 shows a perspective view of the vicinity of the armrest unit 2600 with the driver's seat 2050 removed.
20, the working vehicle 2001 includes a floor member 2060 extending between the driver's seat 2050 and the fenders 2055 disposed on the sides of the driver's seat 2050, A lever guide 2065 is provided so as to extend.
The armrest unit 2600 is disposed above the lever guide 2065 in the middle of the lever width direction of the lever guide 2065.
21 is a side view of the vicinity of the armrest unit 2600 in a state in which the lever guide 2065 is removed.
20 and 21, in the working vehicle 2001, a bracket 2080 is installed upright on the bottom member 2060 between the driver's seat 2050 and the fender 2055, The rest unit 2600 is supported on the bracket 2080 so as to be positioned above the lever guide 2065 in the middle of the lever width direction of the lever guide 2065.
22 to 25 show an inner side view, a gas widthwise outer side view, a gas widthwise outer perspective and a plan view of the arm rest unit 2600 and the bracket 2080, respectively.
22 to 25, the armrest unit 2600 includes a case body 2610 disposed on the side of the driver's seat 2050 and having an armrest area 2601 on the upper surface thereof, 2610) (hereinafter referred to as an armrest mounting operation member).
22, 23, and 25, the case body 2610 includes an armrest portion 2610A having the armrest region 2601 formed on the upper surface thereof, and an armrest portion 2610A formed on the armrest portion 2610A forward And has a forward extension portion 2610B that extends.
26 is an exploded side view of the armrest unit 2600 and the bracket 2080 viewed from the inside in the vehicle width direction.
26, the case body 2610 has a frame 2611 supported by the bracket 2080 and a cover 2612 mounted on the frame 2611. As shown in Fig.
The cover 2612 includes first and second covers 2613 and 2614 which cover the upper portion and the lower portion of the frame 2611, respectively.
20 to 25, the armrest mounting operation member includes the shift operating member 2410 and the PTO on / off operating member 2440. [
As described above, in the present embodiment, the speed change operation member 4210 includes the main speed change operation member 2410a and the speed adjustment member 2410b.
The shift operating member 2410 and the PTO on / off operating member 2440 are configured such that the tip portion serving as the operating portion extends to the outside of the case body 2610 and the shift operating member 2410 is engaged with the PTO on / And is supported by the forward extending portion 2610B in a state of being located forward of the operating member 2440. [
Operation caps are mounted on the front ends of the main speed change operating member 2410a, the speed adjusting member 2410b, and the PTO on / off operating member 2440, respectively.
According to the armrest unit 2600 having such a configuration, the following effects can be obtained.
That is, in the armrest unit 2600, the shift operating member 2410 having a high frequency of use is disposed on the front side away from the armrest region 2601 than the PTO on / off operating member 2440 .
Therefore, the operator can easily operate the speed change operation member 2410 in a state in which the elbow is placed on the armrest area 2601.
In the armrest unit 2600, the PTO on / off operating member 2440 is disposed between the shift operating member 2410 and the armrest region 2601 with respect to the vehicle longitudinal direction.
According to such a configuration, the operability of the PTO on / off operating member 2440 based on the basic operating posture by the operator can be improved.
More specifically, in the oscillating operation of the working vehicle 2001 or during the driving operation, the operator manipulates the steering member 2485 with one hand (e.g., the left hand) to adjust the traveling direction of the working vehicle 2001 And the basic operating posture in which the vehicle speed of the working vehicle 2001 is adjusted by operating the shift operating member 2410 with the other hand (e.g., a right hand).
When the operation by the work machine 2010 is started, the operator moves to the basic operation posture after performing the drive start operation of the work machine 2010 by the PTO on / off operation member 2440, (2001).
When the work vehicle 2001 is excessively close to a side or an obstacle at the time of running the work vehicle 2001 while driving the work machine 2010, the operator urgently stops the work machine 2010 It is necessary to perform the operation stop operation of the working machine 2010 by the PTO on / off operation member 2440. [
Therefore, it is preferable that the PTO on / off operating member 2440 is installed in a place where it is easy to operate based on the basic operating posture.
In this respect, in this embodiment, as described above, the PTO on / off operating member 2440 is positioned between the shift operating member 2410 and the armrest area 2601 in the vehicle longitudinal direction And is supported by the forward extension portion 2610B.
Therefore, the operability of the PTO on / off operating member 2440 based on the basic operating attitude can be improved.
The armrest unit 2600 is also provided with the PTO on / off operation member 2440 to unknowingly operate the PTO on / off operation member 2440 while improving the operability of the PTO on / off operation member 2440 based on the basic operation posture. And has the following constitution to effectively prevent the hand from coming into contact with it.
22, 23 and 25, the front extension portion 2610B includes a base end portion 2610C for supporting the PTO on / off operation member 2440 and a base end portion 2610C for supporting the PTO on / And a forward end portion 2610D that extends forward and supports the shift operating member 2410. [
The PTO on / off operating member 2440 is supported on the base end side portion 2610C in a state in which the operating portion extends upward.
Fig. 27 is a longitudinal end elevational view of the armrest unit 2600 taken along line XXVII-XXVII in Fig.
A region 2610C (1) in which the operating portion of the PTO on / off operating member 2440 is located on the upper surface of the base end side portion 2610C is the PTO ON portion 2610C (1), as shown in FIGS. 22, 25, Off operation member 2440 is located below the armrest area 2601 such that the upper end of the operation section (the upper end of the operation cap) is located below the upper surface of the armrest area 2601. [
With such a configuration, it is possible to effectively prevent the operator's hands from touching the PTO on / off operating member 2440 by unintentionally while improving the operability of the PTO on / off operating member 2440 based on the basic operating posture .
25 and 27, the upper surface of the base-end side portion 2610C is connected to the driver's seat (not shown) of the region 2610C (1) where the operating portion of the PTO ON / OFF operating member 2440 is located And a wall region 2610C (2) extending upward on the side of the front wall 2050 (2050).
By forming the wall region 2610C (2), erroneous operation of the PTO on / off operating member 2440 can be more effectively prevented.
25 and the like, the wall region 2610C (2) preferably includes a wall portion 2610C (2) extending in the longitudinal direction of the vehicle from the proximal portion 2610C between the distal portion 2610D and the armrest 2610A Is formed over the entire area.
With this configuration, the substantially flat area 2610C (1) is surrounded by the front end portion 2610D, the wall region 2610C (2), and the armrest portion 2610A, Off operation member 2440 can be prevented more effectively.
As shown in Figs. 22, 23 and 25, a portion of the upper surface 2610D of the first cover 2613 corresponding to the tip side portion 2610D (in this embodiment, 2610D (1)], which are located above the front portion of the proximal end side portion 2610D (2610D) as viewed from the portion adjacent to the upper surface of the base end portion 2610C, (2610D (2)) adjacent to the front end portion and a fore and aft rear height region 2610D (3) located downwardly from the portion adjacent to the top region 2610D I have.
As shown in Figs. 22, 23, 25, and 26, the main speed change operating member 2410a is configured such that the front end portion serving as the operating portion extends upward from the upper surface of the front end portion 2610D, (2610D (3)) so as to be swingable on both sides of the front lower and rear high regions (2610D (1) and 2610D (2) Side portion 2610D.
22, 25, 26, and the like, it is preferable that the front shift operating member 2410a is disposed in the front lower portion 2610D (1) 50, the above-mentioned working machine lifting / lowering switch 2460 is provided.
With this configuration, operability of the work machine lifting / lowering switch 2460 based on the basic operating attitude can be improved.
23 to 25, the speed adjusting member 2410b has a state in which the distal end portion serving as the operating portion extends outward from the side of the front end portion 2610D opposite to the driver's seat 2050 And is supported by the case body 2610 at a predetermined position.
Specifically, as shown in Fig. 25, the base end side portion 2610C extends forward from the armrest portion 2610A along the substantially front-rear direction of the vehicle when viewed in plan.
On the other hand, the front end portion 2610D is inclined with respect to the vehicle front-rear direction as viewed from the plane so as to be spaced apart from the driver's seat 2050 as it goes from the rear end side to the front end side.
In this configuration, the speed adjusting member 2410b is configured such that the front end portion serving as the operating portion extends outward from the side opposite to the driver's seat 2050 in the front end portion 2610D, .
According to this configuration, the operator can operate the speed adjusting member 2410b with no difficulty in a state in which the elbow is placed on the armrest area 2601. [
28 is an exploded perspective view of the armrest unit 2600 and the bracket 2080 viewed from the outside in the widthwise direction of the base body.
29 shows an exploded perspective view of the frame 2611 viewed from the outside in the vehicle width direction.
As shown in Figs. 26, 28 and 29, the frame 2611 includes a first region 2611 (1) corresponding to the armrest portion 2610A and a second region 2611 (1) corresponding to the base end portion 2610C And a third region 2611 (3) corresponding to the tip side portion 2610D.
The PTO on / off operating member 2440 is supported on the second region 2611 (2), and the main speed change operating member 2410a and the working machine lifting / lowering switch 2460 are supported by the third region 2611 ( 3).
Fig. 30 shows a plan view of the front extended portion 2610B with the first cover 2613 removed.
31 shows a bottom view of the front extended portion 2610B in a state in which the second cover 2614 is removed.
As shown in Figs. 26, 28, 30 and 31, in this embodiment, the speed adjusting member 2410b is sandwiched by the first and second covers 2613 and 2614. [
When the speed change operating member 2410 includes the main speed change operating member 2410a and the speed adjusting member 2410b as in the present embodiment, the speed change ratio of the continuously- You can fine-tune it.
On the other hand, depending on the mode of use or the operator of the working vehicle 2001, there is a case in which the speed change ratio manipulation (i.e., the vehicle speed operation) of the stepless speed change mechanism 2021 by the speed adjusting member 2410b is not required .
In this case, the operator performs the vehicle speed operation of the working vehicle 2001 only by the main speed change operating member 2410a. However, when the driver unconsciously contacts the speed adjusting member 2410b, The output speed of the continuously-variable transmission device 2021 becomes an unintended speed even if the member 2410a is operated to a desired position.
In consideration of this point, the present embodiment adopts the following configuration.
That is, the armrest unit 2600, which also functions as the shift operating unit, is constituted by the main speed change operating member 2410a that is capable of swinging around the swing axis line in accordance with the artificial operation, And the speed change member 2410b which is rotatably supported by the main speed change operation member 2410a and the main speed change operation member 2410a so as to be swingable about the swing axis line in a state in which the distal end portion of the main speed change operating member 2410a extends outward In addition to the case body 2610 that rotatably supports the speed adjusting member 2410b in a state in which the front end portion of the speed adjusting member 2410b extends outward, the main speed varying operation member 2410a, And a speed detecting member 2415b for detecting an operating position around the axis of the speed adjusting member 2410b, And an adjustment sensor 2415b.
32 is a side view of the armrest unit 2600 in the vicinity of the speed adjusting member 2410b.
In Fig. 32, the operation cap mounted on the distal end portion of the speed adjusting member 2410b is omitted in order to facilitate understanding.
As shown in Figs. 23 to 25, Fig. 28 and Figs. 30 to 32, the arm rest unit 2600 having such a configuration is also provided with the speed regulating member 2600 according to an artificial operation from the outside of the case body 2610, A locking mechanism 2620 is provided which is capable of rotating the arm 2410b around the axis or making the arm 2410b unrotatable about the axis.
The locking mechanism 2620 is provided to allow a precise vehicle speed manipulation using the main speed change operating member 2410a and the speed adjusting member 2410b to perform a precise vehicle speed operation using the speed adjusting member 2410b The erroneous operation of the speed adjusting member 2410b can be reliably prevented.
Figs. 33 and 34 are side views of the arm rest unit 2600 in the vicinity of the speed adjusting member 2410b. Figs. 33 and 34 show a state in which the first cover 2613 is removed and a state in which the second cover 2614 is removed Fig.
35 and 36 are side views of the arm rest unit 2600 in the vicinity of the speed regulating member 2410b and show a side view in which both the first and second covers 2613 and 2614 are separated.
33 to 36, the operation cap for the speed adjusting member 2410b is not shown in order to facilitate understanding.
The locking mechanism 2620 is movable in the direction perpendicular to the axis of the speed adjusting member 2410b so that the locking mechanism 2620 can be moved away from the speed adjusting member 2410b, And a locking operation member 2622 having a proximal end connected to the locking member 2621 and a distal end extended to the outside of the case body 2610. [
23, 24, and 32, a slit 2625 extending in a direction perpendicular to the axis of the speed adjusting member 2410b is formed in the case body 2610 .
The locking operation member 2622 extends in the interior and the exterior of the housing 2610 through the slit 2625 so that the locking member 2621 moves in the direction orthogonal to the axis of the speed adjusting member 2410b So that it can be moved along.
As shown in Figs. 33 to 36, the speed adjusting member 2410b has a planar surface area at least partially formed at a portion located inside the case body 2610 at a predetermined angle around the axis of the outer surface, And a to-be-engaged portion 2413 which is formed as a hollow portion 2413a.
The locking member 2621 engages with the planar area 2413a of the engaged portion 2413 in accordance with the operation of the locking operation member 2622 so that the speed adjusting member 2410b can not rotate about the axis (See FIGS. 33 to 35) for locking the speed adjusting member 2410b and a releasing position (see FIG. 36) for releasing the speed adjusting member 2410b from the speed adjusting member 2410b so as to be rotatable around the axis ) Of the user.
With such a configuration, it is possible to perform a precise vehicle speed operation using the main speed change operating member 2410a and the speed adjusting member 2410b with a simple structure, and when the fine speed operation using the speed adjusting member 2410b is not required It is possible to reliably prevent erroneous operation of the speed adjusting member 2410b.
Preferably, as shown in Figs. 33 to 36, the engaged portion 2413 of the speed adjusting member 2410b has an arc-shaped outer surface with reference to an axis other than the plane region 2413a .
With such a configuration, the locking member 2621 can not be located in the locking position only when the speed adjusting member 2410b is positioned at a predetermined lockable position around the axis.
That is, in the locked state, the speed adjusting member 2410b is always positioned at the predetermined lockable position around the axis, and the shift operation can be stabilized only by the main speed change operating member 2410a.
According to the above configuration, even if the speed adjusting member 2410b slightly rotates about the axis from the lockable position, the speed adjusting member 2410b can be moved around the axis by placing the locking member 2621 in the locking position And can be pivoted to the predetermined lockable position.
In addition, the lockable position of the speed adjusting member 2410b may be, for example, the fastest position of the speed adjusting member 2410b.
36, the locking member 2621 has an engaging surface 2621a facing the direction orthogonal to the moving direction of the locking member 2621, and the engaging surface 2621a Is engaged with the planar area 2413a, the speed adjusting member 2410b is locked in a non-rotatable state around the axis line.
It is also possible to configure such that the engaging surface 2621a of the locking member 2621 faces the moving direction of the locking member 2621, for example, as shown in Fig. 37 (a).
Instead of a form in which the locking member 2621 and the speed adjusting member 2410b are in surface contact with each other to lock the speed adjusting member 2410b as in this embodiment and the embodiment shown in Fig. 37 (a) The locking member 2621 and the speed adjusting member 2410b may be configured to lock the speed adjusting member 2410b by engaging the concave and convex portions.
The locking member 2621 and the speed adjusting member 2410b may be provided with a concave portion or a convex portion 2413b in the engaged portion 2413 of the speed adjusting member 2410b And the other side 2621b of the concave or convex portion is formed in the locking member 2621. [
In this case, the slit formed in the case body 2610 can be used to lock the guide in the moving direction of the locking member 2621 and the locking member 2621 in the locking position and the releasing position (see Fig. 37 the locking member 2621 is inserted into the case body 2610 so that the guide in the moving direction of the locking member 2621 and the locking member 2621 in the locking position and the unlocking position of the locking member 2621 It is also possible to perform locking (see Fig. 37 (c)).
In the present embodiment, the lock mechanism 2620 is applied to the armrest unit 2600 as an example. However, it is needless to say that the main speed change operation member and the main speed change operation member, which are swingable about the swing axis line, A speed adjusting member which is rotatable about an axis in accordance with an artificial operation; and a speed adjusting member which supports the main speed change operating member in a swingable manner around the swing axis in a state in which the leading end portion of the main speed varying operation member extends outward, A main body speed sensor for detecting an operation position around the swing axis of the main speed change operating member; Various types of stools equipped with a speed-adjusting sensor for detecting the operating position around the axis of the member Speed operation unit.
Here, the speed change operation unit 2700 that can switch the speed adjusting member 2410b to a locked state or an operable state by a different structure from the locking mechanism 2620 will be described.
38 is a longitudinal sectional view of the speed change operation unit 2700. As shown in Fig.
In Fig. 38, the same reference numerals are attached to the same or corresponding members as those in this embodiment.
38, the speed adjusting member 2410b of the speed change operation unit 2700 includes a sensor shaft body 2711 for detecting an operation position around the axis by the speed adjusting sensor 2415b, A sensor shaft 2710 including an engaging arm 2712 extending radially outward from the sensor shaft main body 2711 and a sensor shaft 2710 extending from the sensor shaft main body 2711 in a state where the sensor shaft main body 2711 can be artificially operated from the outside of the case body 2610. [ And an operation cap 2720 to be extruded to the outside.
38, the operation cap 2720 has a hollow peripheral wall 2721 extending in the axial direction and an end wall 2722 closing the axial outer side of the peripheral wall 2721, Is biased axially outward by a biasing member 2730 sandwiched between the sensor shaft body 2711 and the end wall 2722 so that the sensor shaft body 2711 can be relatively rotated around the axis, And are extrapolated so as to be movable relative to each other.
38, a slit 2723 for engaging with the engaging arm 2712 and a locking arm 2724 extending outward in the radial direction are provided on the peripheral wall 2721. As shown in Fig.
Fig. 39 is an end view of Fig. 38 taken along the line XXXIX-XXXIX.
39, the slit 2723 includes an axially extending portion 2723a extending in the axial direction and a circumferentially extending portion 2723b extending in the circumferential direction around the axial direction from the axially outer side of the axially extending portion 2723a. And a portion 2723b.
With this configuration, when the operation cap 2720 is positioned at the initial position (see the solid line in FIG. 38) axially outward by the biasing force of the biasing member 2730, 2712 engage with the axially inner side of the axial extension portion 723a so that the operation cap 2720 and the sensor shaft body 2711 can not rotate relative to each other around the axis.
That is, when the operation cap 2720 is positioned at the initial position, the sensor shaft main body 2711 rotates around the axis according to the rotation about the axis of the operation cap 2720.
On the other hand, when the operating cap 2720 is located in the pushing position (see the two-dot chain line in FIG. 38) in the axial direction inside against the biasing force of the biasing member 2730, The operating cap 2720 is located at a position where it can move relative to the axially outward side of the axial extending portion 2723a and engage with the circumferential extending portion 2723b, The arm 2712 relatively rotates around the axis of the sensor shaft main body 2711 within a range in which the arm 2712 relatively moves within the circumferential extension 2723b.
That is, when the operation cap 2720 is positioned at the pushing position, the operation cap 2720 is moved in the range of the relative movement of the engagement arm 2712 in the circumferential extension portion 2723b, The main body 2711 can be rotated around the axis without rotating the main body 2711 around the axis.
38) and the inside (see the two-dot chain line in Fig. 38) of the case body 2610 when the operation cap 2720 is positioned at the initial position and the pushing position, As shown in FIG.
Specifically, a notch portion 2735 is formed in the case body 2610.
Fig. 40 is an end view of Fig. 38 taken along line XXXX-XXXX.
40, the notch portion 2735 is formed at a position opposite to the locking arm 2724 when the operation cap 2720 is positioned at a predetermined lockable position around the axis, The operating cap 2720 is allowed to move in the axial direction between the initial position and the pushing position only when the cap 2720 is positioned at the lockable position (see Fig. 40 (a)).
That is, the operation cap 2720 is pushed from the initial position to the pushing position only when the operation cap 2720 is positioned at the position around the axis lockable position, so that the locking arm 2724 is moved from the outside of the case body 2610 It can be moved inward.
The operation cap 2720 located at the lockable position is moved from the initial position to the pushing position against the biasing force of the biasing member 2730, When the operating cap 2720 is rotated around the axis within the range in which the relative movement within the circumferential extension portion 2723b is possible to release the pressing force, the locking arm 2724 is moved inwardly of the case body 2610 And locks the rotation about the axis of the operation cap 2720 in engagement with the surface.
The speed change operation unit 2700 having such a configuration can also perform fine vehicle operation using the main speed change operating member 2410a and the speed adjusting member 2410b while performing a fine vehicle operation using the speed adjusting member 2410b It is possible to reliably prevent the erroneous operation of the speed adjusting member 2410b in the case where the speed adjusting member 2410b is not required.
The lockable position of the operation cap 2720 may be, for example, a position for positioning the sensor shaft body 2711 at the maximum speed position around the axis.
Preferably, as shown in Figs. 38 and 40, the locking arm 2724 is formed with one of the concave or convex portions 2725.
When the operation cap 2720 is positioned at a predetermined locking position (see FIG. 40 (b)) around the axis, the inner surface of the case body 2610 is formed with a concave or convex portion which engages with the concave or convex portion And the other side of the convex portion 2736 is formed.
With such a configuration, it is possible to more reliably prevent the operation cap 2720 located at the locking position from involuntarily turning around the axis.
Here, the detent mechanism 2630 for locking the main speed change operating member 2410a to a predetermined operating position will be described.
The armrest unit 2600 is provided with the detent mechanism for holding the main speed change operating member 2410a at a predetermined locking position around the swing axis line, as shown in Figs. 28 to 31 and Figs. 34 to 36, 2630 are provided.
Fig. 41 is a sectional view taken along the line XXXXI-XXXXI in Fig. 41, the illustration of the operation cap of the main speed change operating member 2410a is omitted.
Fig. 42 is an enlarged view of the detent mechanism 2630. Fig.
The detent mechanism 2630 includes a detent ball 2635, a detent plate 2640, and a detent biasing member 2645, as shown in FIGS. 28 to 30 and 41 to 42, and the like. .
The detent ball 2635 swings around the swing axis with the main speed change operating member 2410a and is movable relative to the main speed change operating member 2410a in a direction parallel to the swing axis And is supported by the main speed change operating member 2410a.
41 and 42, the detent ball 2635 is supported on a detent ball support body 2650 provided on the main speed change operating member 2410a.
The detent ball support 2650 has an axial hole extending parallel to the swing axis line with the first end facing the detent plate 2640 and at least opening at the first end, The detent ball 2635 and the detent biasing member 2645 are accommodated in the axial hole.
More specifically, as shown in FIG. 41, the detent ball 2635 is biased by the biasing force of the detent biasing member 2645 received in the axial hole, And is received in the axial hole so as to be able to contact the detent plate 2640.
42, the proximal end portion of the main speed change operating member 2410a is supported so as to be rotatable relative to the pivot shaft 2665 for partitioning the pivot axis, And has a lever portion 2660 extending outwardly through a slit 2615 (see Figs. 24 and 25, etc.) formed in a body 2610 (in this embodiment, the first cover 2613).
The detent ball support body 2650 is supported on the lever portion 2660 such that the first end portion of the detent ball support body 2650 faces the detent plate 2640 and is parallel to the swing axis line.
More specifically, the lever portion 2660 includes a first lever member 2661 having a proximal end rotatably supported on the pivot shaft 2665, and a second lever member 2661 having a proximal end connected to the first lever member 2661, And a second lever member 2662 extending outwardly through the slit 2615 (see FIGS. 24 and 25, etc.) formed in the case body 2610.
The detent ball supporter 2650 is disposed radially outwardly of the first lever member 2661 and the second lever member 2662 with respect to the pivot axis, 2661.
The detent biasing member 2645 is accommodated in the detent ball support 2650 so as to bias the detent ball 2635 toward the detent plate 2640 as described above.
More specifically, as shown in FIG. 41, the detent biasing member 2645 is fixed to the detent ball support (not shown) such that the distal end thereof is engaged with the detent ball 2635 in a state where the axial- 2650).
Preferably, the detent mechanism 2630 is provided with a detent adjusting member 2646 for adjusting the axial position of the proximal end of the detent biasing member 2645 in an adjustable manner.
By providing the detent adjusting member 2646, the biasing force of the detent biasing member 2645 can be easily adjusted.
In this embodiment, as shown in Fig. 40, the axial hole of the detent support body 2650 is also open to the second end portion of the detent ball support body 2650 opposite to the first end portion have.
The detent adjusting member 2646 is inserted into the axial hole from the opening on the second end side so that the distal end portion of the detent adjusting member 2646 is engaged with the proximal end of the detent biasing member 2645, 2650 in the axial direction.
The detent adjusting member 2646 may be, for example, a bolt into which the axial hole is screwed from the opening on the second end side.
The detent plate 2650 is fixedly installed so as to face the detent ball 2635 over a swing range around the swing axis of the main speed change operating member 2410a.
As shown in FIGS. 28 and 42, the detent plate 2640 is provided with a plurality of detent recesses 2641 arranged along the circumferential direction with reference to the swing axis as the detent balls 2635 A plurality of detent recesses 2641 are formed so as to be able to receive the detent recesses 2641 therein.
In the present embodiment, the detent plate 2640 supports the main speed change operation member 2410a via the pivot shaft 2665 as described above, and a part of the frame 2611 .
41, the plurality of detent recesses 2641 are formed on the outer surface of the detent plate 2640, opposite to the detent ball 2635, Penetrating recessed portions on the side opposite to the side of the detent plate 2640. Thus, the locking position interval of the main speed change operation member 2410a can be narrowed without causing the detent plate 2640 to be large-sized.
That is, in the conventional detent mechanism, the plurality of detent recesses are through holes penetrating the detent plate.
When the plurality of detent recesses are through holes, the distance between the plurality of detent recesses can not be narrowed from the viewpoint of strength and manufacturing, and as a result, The pitch of the locking position around the swing axis can not be narrowed.
Further, by increasing the radial distance of the plurality of detent recesses with reference to the swing axis, the pitch of the locking position of the operating member can be narrowed without narrowing the interval of the plurality of recesses as necessary. However, The detent plate is increased in size.
On the contrary, in the present embodiment, as described above, the plurality of detent recesses 2641 are non-through holes.
Therefore, the locking position pitch of the main speed change operating member 2410a can be narrowed as much as possible without increasing the size of the detent plate 2640.
The detent plate 2640 may be disposed vertically with respect to the state in which the armrest unit 2600 is installed or in such a manner that the opening end of the detent recess 2641 is downward.
With this configuration, it is possible to effectively prevent impurities such as rainwater and dust from staying in the detent concave portion 2641.
Fig. 43 shows a front end perspective view of the front extension 2610B of the armrest unit 2600. As shown in Fig. In FIG. 43, the operation cap of the main speed change operating member 2410a is omitted for easy understanding.
As described above, the main speed change operating member 2410a extends to the outside of the case body 2610 with its tip end through the slit 2615 formed in the case body 2610. [
In this embodiment, as shown in Fig. 43, the slit 2615 is formed so as to be spaced from the position where the detent ball 2635 (see Fig. 41) contacts the detent plate 2640 in the direction of the swing axis As shown in Fig.
According to such a configuration, impurities such as water or dust entering the case body 2610 through the slit 2615 enter the detent concave portion 641, and the detent concave portion 2641 It is possible to effectively prevent entry into the detent ball support 2650 through the opening at the first end.
Fig. 44 shows a longitudinal side view of the armrest unit 2600 along the slit 2615. As shown in Fig. 44, the illustration of the main speed sensor 2415a or the like shown in Fig. 43 is omitted for ease of understanding.
As shown in Figs. 43 and 44, in this embodiment, the radially inner end 2616 of the case body 2610 with respect to the swing axis of the portion forming the slit 2615 is a And is located radially inward of the tilt plate 2640 with respect to the swing axis as compared to the radially outer end of the tent plate 2640 with respect to the swing axis.
According to such a configuration, impurities such as water or dust entering the case body 2610 through the slit 2615 enter the detent recess 2641 and the detent recess 2641 Can be effectively prevented from entering into the detent ball support 2650 through the opening at the first end.
Preferably, as shown in Figs. 23 and 28, a water dropping hole 2614a can be formed in the bottom wall of the second cover 2614. Fig. By forming the drain hole 2614a, the water that has entered the case body 2610 through the slit 2615 can be discharged to the outside of the case body 2610.
43, the case body 2610 (the first cover 2613) is provided with a slit 2615 with respect to the axial direction of the swing axis, An inner region 2613I located on the driver's seat 2050 side than the central region 2613C and an outer region 2613O located outside the central region 2613C.
43, the central region 2613C includes a pair of outer wall portions 2617a extending substantially parallel to the swing axis line with the slit 2615 interposed therebetween, And a pair of flange portions 2617b extending in the direction close to the swing axis line from an end of the shaft 2617a adjacent to the slit 2615. [
In such a configuration, the free end of the pair of flange portions 2617b becomes a radially inner end portion 2616 with respect to the swing axis of the portion forming the slit 2615. [
In this embodiment, as shown in Figs. 25 and 43, the central region 2613C is formed in a concave shape that opens upward. Thus, in the operating portion of the main speed change operating member 2410a, Thereby effectively preventing unintentional contact of the hand of the user.
24, 25, and 43, the case body 2610 (the first cover 2613 in this embodiment) is provided with the central region 2613C and the inner region 2613C And an outer wall region 2619 which is bulged upward between the central region 2613C and the outer region 2613O between the inner side wall region 2613 and the inner side wall region 2613. The inner wall region 2618 extends upwardly between the central region 2613C and the outer region 2613O, The central region 2613C sandwiched by the outer wall region 2619 and the central region 2613C held by the outer wall region 2619 are upwardly open.
43, it is preferable that the inner wall region 2618 is bulged higher than the outer wall region 2619 and the detent plate 2640 is disposed in the inner wall region 2619 with respect to the axial direction of the swing axis line, It is possible to place it at the same position as that of the main body 2618.
With such a configuration, the detent plate 2640 can be made as large as possible without causing the size of the case body 2610 to be increased.
In the present embodiment, in order to facilitate the adjustment work of the biasing force of the detent biasing member 2645 by the detent adjusting member 2646, the following configuration is also provided.
As described above, the case body 2610 includes a frame 2611 (the detent plate 2640 also serving as a part of the frame 2611 in the present embodiment) for supporting the swinging shaft, And the cover 2612 is detachably mounted on the frame 2061 so as to form an accommodation space for accommodating the mechanism 2630. The cover 2612 includes a first cover And a second cover 2614 detachably mounted on the frame 2611 and / or the first cover 2613 so as to function together with the first cover 2613 to partition the accommodation space have.
45 is an enlarged side view of the armrest unit 2600 with the second cover 2614 removed.
45, in a state in which at least the main speed change operating member 2410a is positioned at one end of the operable range around the swing axis line and on one side around the swing axis line, the detent ball supporting member 2650 And the second end is configured to be positioned in the second cover 2614. [
According to this configuration, the detent adjusting member 2646 can be accessed only by detaching the second cover 2614, thereby facilitating the adjustment operation of the detent adjusting member 2646.
In the present embodiment, the detent mechanism 2630 is provided in the armrest unit 2600. However, the detent mechanism 2630 may swing around the swing axis line in accordance with the artificial operation, The present invention is applicable to various operation units having an operating member made possible.
Here, the bracket 2080 for supporting the armrest unit 2600 will be described.
22 to 24, 26, and the like, the bracket 2080 includes a base frame 2081 secured to the bottom member 2060 (see Figs. 19 to 21, etc.) through a fastening member such as a bolt, A first attachment plate 2082 connected to the upper end of the base frame 2081 and a second attachment plate 2083 connected to the first attachment plate 2082.
The base frame 2081 also functions as a supporting member of the working machine lifting lever 2450 as shown in Figs. 22 and 26, for example.
The work machine lifting lever 2450 is attached to the base frame 2081 between the driver's seat 2050 and the fender 2055 so as to be rotatable around a rotation axis along the gas width direction, ).
Fig. 46 shows a side view in the vicinity of the armrest unit 2600. Fig.
20, 26, and 46, the lever guide 2065 allows the working machine lifting lever 2450 to pivot about the rotation axis in a state in which the upper end extends upward, 1 < / RTI > attaching plate 2082 to allow the first polymerized region 2082a of the first attaching plate 2082 to extend upward.
20 and 46, an operation panel unit 2070 is provided on the outer side of the lever guide 2065 in the vehicle width direction than the armrest unit 2600.
Fig. 47 shows a schematic plan view of the operation panel unit 2070. Fig.
20, 46, 47, and the like, the operation panel unit 2070 is provided with the till depth setting member 2480, the automatic tilt setting member 2470a, A descending speed changing position setting member 2465, and the manual tilt operating member 2470c are arranged in this order.
The automatic slant setting member 2470a, the working machine up and down positioning member 2455, and the downward speed changing and positioning member 2465 are covered with a cover member 2071 that can be opened and closed.
20 and 46, the PTO switching operation member 2445 is disposed on the rear side of the armrest unit 2600 among the lever guides 2065. [
Fig. 48 is an exploded perspective view of the bracket 2080. Fig.
26 and 48, the first attachment plate 2082 has a flat first polymerization zone 2082a, and the first polymerization zone 2082a extends in a substantially vertical direction, And is fixed to the base frame 2081 so as to extend in the front-rear direction.
The second attachment plate 2083 is detachably connected to the first attachment frame 2082 while supporting the frame 2611 of the case body 2610 in the armrest unit 2600 have.
In the present embodiment, the frame 2611 of the armrest unit 2600 is fixed to the second attachment plate 2083 so as to be positionally adjustable around the rotation axis 2611a along the vehicle width direction at the rear end side .
As shown in Fig. 46, the second attachment plate 2083 has a flat second polymerization region 2083a which is polymerized in the first polymerization region 2082a.
That is, the second attaching plate 2083 is fixed to the first polymerization region 2082a through the first and second fastening members 2091 and 2092 in a state where the second polymerization region 2083a is polymerized in the first polymerization region 2082a, And is detachably connected to the attachment plate 2082.
In the present embodiment, the second attachment plate 2083 is fixed to the first attachment plate 2082 so as to be adjustable in the front-rear direction of the vehicle and adjustable in the attachment angle.
Specifically, as shown in Fig. 48, a long hole 2082b is formed in the first polymerization area 2082a along the vehicle longitudinal direction.
On the other hand, the second polymerization area 2083a is formed with a front-back positioning adjustment attachment hole 2083b.
The first and second attachment plates 2082 and 2083 are connected through the first fastening member 2091 such as a bolt penetrating through the long hole 2082b and the front and rear position adjustment attachment hole 2083b, .
With such a configuration, the second attachment plate 2083 is positioned within the range in which the front-rear-position adjustment attachment hole 2083b can move relative to the long hole 2082b in the vehicle longitudinal direction relative to the first attachment plate 2082 In the forward and backward directions.
As shown in FIG. 48, a plurality of first plate side angle adjusting attachment holes are formed in the first polymerization region 2082a, and a plurality of second plate side angle adjusting attachment portions Holes are formed.
The second plate side angle adjusting attachment hole has a second plate side angle adjusting first attachment hole (A1) positioned on the circumference of a radius (R1) about the front and rear position adjustment attachment hole (2083b) And a second plate-side angle adjusting second attachment hole A2 located on the circumference of R2 with a radius of R1 smaller than R1 with the position adjustment attachment hole 2083b as a center.
On the other hand, the first plate-side angle adjusting attachment hole is formed in a first plate side member (not shown) including a plurality of attachment holes (B1, B2) usable when the second attachment plate (2083) And a plurality of attachment holes (B3, B4) usable when the second attachment plate (2083) is located at the forward and backward second attaching position, And a plurality of attachment holes (B5, B6) usable when the second attachment plate (2083) is located at the front-rear direction third attachment position, 3 attachment holes [2085 (3)].
In the present embodiment, the front-rear direction first to third attachment positions of the second attachment plate 2083 are such that the front-rear position adjustment attachment attachment holes 2083b are located at the front side, Rear direction attachment position of the second attachment plate 2083 when it is positioned on the rear side.
In the present embodiment, in order to explain an example in which the second attachment plate 2083 is fixed at three positions of the first to third attachment positions, the first plate-side angle adjustment attachment holes (B1 to B7) (1) to 2085 (3). However, the number of the first plate-side attachment hole groups can naturally be set appropriately.
That is, the position of the second attachment plate 2083 in the longitudinal direction can be adjusted steplessly.
Therefore, the number of the first plate-side attachment hole groups is determined in accordance with the number of forward and backward positions at which the second attachment plate 2083 is fixed.
The plurality of attachment holes B1 and B2 of the first plate-side first attachment hole group 2085 (1) are arranged in the front-rear direction position adjustment position when the second attachment plate 2083 is positioned at the front- Is positioned on the circumference of a radius R1 about the point where the attachment hole 2083b is located.
The plurality of attachment holes B3 and B4 of the first plate-side second attachment hole group 2085 (2) are arranged in the front and rear position adjustment positions when the second attachment plate 2083 is positioned at the front- Is positioned on the circumference of a radius R1 about the point where the attachment hole 2083b is located.
One of the attachment holes B4 of the first plate-side second attachment hole group 2085 (2) is provided for the front-rear position adjustment when the second attachment plate 2083 is positioned at the front- And is positioned on the circumference of a radius R2 about the point where the attachment hole 2083b is located.
The plurality of mounting holes B5 and B6 of the first plate-side third mounting hole group 2085 (3) are arranged in the front-back position adjusting position when the second mounting plate 2083 is positioned at the front- Is positioned on the circumference of a radius R1 about the point where the attachment hole 2083b is located.
One of the attachment holes B6 of the first plate-side third attachment hole group 2085 (3) is located at the second attachment position of the second attachment plate 2083 in the front- And is positioned on the circumference of a radius R2 about the point where the attachment hole 2083b is located.
48, the first plate-side angle-adjusting attachment hole is provided with attachment holes (not shown) for forming the first plate-side first to third attachment hole groups 2085 (1) to 2085 Rear position adjustment attachment hole 2083b is positioned when the second attachment plate 2083 is positioned at the front-rear direction third attachment position, in addition to the first attachment plate 2083 (B1-B6) And the first plate-side additional attachment hole B7 positioned on the second plate-side attachment hole B7.
According to such a configuration, the number of the first and second plate side angle-adjusting attachment holes can be reduced, and the second attachment plate 2083 can be rotated at three different angles at least in the front- And can be fixed to the first attachment plate 2082.
In the present embodiment, as described above, the first plate-side first mounting hole group 2085 (1) includes two mounting holes B1 and B2, and the first plate- Group 2085 (2) includes two attachment holes B3 and B4 and the first plate-side third attachment hole group 2085 (3) includes two attachment holes B5 and B6 , And the first plate-side additional mounting hole includes one mounting hole (B7). The second plate side angle adjusting attachment hole includes two attachment holes A1 and A2.
That is, in the present embodiment, nine first and second plate-side angle-adjusting attachment holes are formed in total, and the nine attachment holes allow the second attachment plate 2083 to move in the front- It is possible to obtain an attaching posture of 11 patterns in total including three kinds of attaching postures in each of the positions when the button is placed at the attaching position.
Specifically, the combination of the attachment holes A1 and B1, the combination of the attachment holes A1 and B2, and the combination of the attachment holes (A1 and B2) in a state in which the second attachment plate 2083 is positioned at the front- 2083 by fastening the first and second attachment plates 2082, 2083 with the second fastening member 2092 in the form of a knob screw, for example, using a combination of the first attachment plate 2083, the second attachment plate 2083, Downward posture, and horizontal posture in the front-rear direction first attaching position.
The combination of the attachment holes A1 and B3 and the combination of the attachment holes A1 and B4 and the combination of the attachment holes A2 and B4 in a state in which the second attachment plate 2083 is positioned at the front- B6) to fasten the first and second attachment plates (2082, 2083) by the second fastening member (2092) so that the second attachment plate (2083) is moved in the forward and backward second attachment position Downward posture, forward-downward posture, and horizontal posture.
The combination of the attachment holes A1 and B5 and the combination of the attachment holes A1 and B6 and the combination of the attachment holes A2 and B5 in a state in which the second attachment plate 2083 is positioned at the front- The first and second attachment plates 2082 and 2083 are fastened by the second fastening member 2092 to the second attachment plate 2083 in the forward and backward third attachment positions Downward posture, forward-downward posture, and horizontal posture.
In the present embodiment, the second attachment plate 2083 is positioned between the first position and the second position in the front-rear direction, and the combination of the attachment holes (A2, B3) 2092 to fix the second attachment plate 2083 in the forward and upward posture between the forward and backward first position and the second position, The first fastening member 2092 fastens the first fastening member 2092 with the combination of the attachment holes A2 and B5 in a state in which the second attachment plate 2083 is positioned between the forward and backward second position and the third position. The second attachment plate 2083 can be fixed in the forward upward posture between the forward and backward second position and the third position by fastening the second attachment plates 2082 and 2083.
