JP2001191804A - Traveling vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reasonable cover for traveling vehicle capable of eliminating a problem that as a cover for covering a traveling vehicle from over is divided into a larger number, a structure for installing the divided cover in the traveling vehicle becomes necessary and rigidity of the whole of the cover is lowered in a traveling vehicle such as a farm working machine. SOLUTION: In this traveling vehicle, a cover for covering a traveling car body from over is divided into a center cover 75, a bonnet cover 81 and side covers 82. An engine 4, a driving pulley 13 side of an auxiliary transmission 11, and a main part of a gear shift operation interlocking mechanism from an auxiliary gear shift lever to the auxiliary transmission 11 are arranged under the center cover 75.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention belongs to the technical field of traveling vehicles.

[0002]

2. Description of the Related Art Conventionally, for example, an agricultural working machine such as a tractor or a rice transplanter is provided with a traveling vehicle that transmits an engine, which is a prime mover, to a traveling device via a transmission to travel the aircraft. And, in the traveling vehicle,
There is a type in which a cover such as a step floor for covering a traveling vehicle body from above is divided into a plurality of parts, which is configured as a riding type on which a vehicle rides.

In this traveling vehicle, since the cover is divided into a plurality of parts, when the maintenance of the transmission and the prime mover below the cover is performed, the divided covers are separated one by one. By detaching or moving and opening and closing, it is possible to facilitate the operation of removing or moving the cover.

[0004]

However, in the above-mentioned conventional traveling vehicle, as the cover is divided into a large number of parts, a structure for mounting each of the divided covers to the traveling vehicle body is required. In addition, it is troublesome if the rigidity of the entire cover constituted by the plurality of divided covers is reduced, or if it is necessary to remove a plurality of the divided covers when performing maintenance or the like.

[0005]

SUMMARY OF THE INVENTION The present invention has taken the following technical measures in order to solve the above-mentioned problems and to construct a cover of a reasonable traveling vehicle. That is, the invention according to claim 1 is:
Traveling devices 16 and 20 from the prime mover 4 via the transmission 11
In a traveling vehicle having a configuration in which the body travels by transmitting to the vehicle, a shift operation tool 65 for performing a shift operation of the transmission 11 is provided, and covers 75, 81, and 82 for covering the traveling vehicle body from above are provided in a plurality of parts. And the divided cover 7
The transmission 1 and the transmission operating tool 65 are provided below the integral cover 75 of the transmission 5, 81, and 82.
1 is a traveling vehicle in which a speed change operation linking mechanism is arranged.

A second aspect of the present invention is a cover 75 that covers a running vehicle body from above in a running vehicle having a structure in which the body travels by being transmitted from the prime mover 4 to the running devices 16 and 20 via the transmission 11. , 81, and 82 are provided in a plurality of parts, and the prime mover 4 and the transmission 11 are disposed below the integral cover 75 among the divided covers 75, 81, and 82. Traveling vehicle.

According to a third aspect of the present invention, at least a part of the covers 75, 81, and 82 for covering the traveling vehicle body from above is provided by being divided into right and left parts, and the divided covers 75, 8 are provided.
2. The traveling vehicle according to claim 1, wherein the transmission 11 is disposed below an integrated cover 75 at the center in the left-right direction of the vehicle body.

[0010] The invention according to claim 4 is characterized in that, of the divided covers 75 and 82, the cover 82 on the outer side in the left-right direction is provided.
The traveling vehicle according to claim 3, wherein at least a portion 82d of the vehicle overlaps below an integrated cover 75 at the center in the left-right direction of the vehicle body.

The invention according to claim 5 is configured such that an operating tool 79 operated by an operator is protruded from an integral cover of the divided covers 75, 81, and 82, and the operation The cover 75 from which the tool 79 protrudes is moved relative to the traveling vehicle body to provide the cover 75 so as to be openable and closable, and the fixing tool for fixing the cover 75 in an open state is the operating tool 7.
A traveling vehicle according to any one of claims 1, 2, 3, and 4, wherein the traveling vehicle is also used as the vehicle.

Therefore, the traveling vehicle 2 has a structure in which covers 75, 81, and 82 for covering the traveling vehicle body from above are provided in a plurality of parts, and the traveling vehicle 2 travels via the transmission 11 by driving the prime mover 4. The devices 16 and 20 are driven and run. The traveling vehicle 2 according to claim 1 is configured to perform a shift operation of the transmission 11 by a shift operation tool 65, and perform a shift operation from the transmission 11 and the shift operation tool 65 to the transmission 11. Since the cover 75 that covers the linking mechanism from above is formed as an integral cover of the plurality of divided covers 75, 81, and 82, the integral cover 75 is removed or moved. Thus, maintenance related to the transmission 11 including the transmission operation linking mechanism can be performed.

A traveling vehicle 2 according to a second aspect of the present invention has a cover 7 that covers the prime mover 4 and the transmission 11 from above.
5 is constituted as an integral cover of the plurality of divided covers 75, 81, 82, so that the integral cover is formed.
By removing or moving 75, maintenance of the transmission mechanism from the prime mover 4 to the transmission 11 can be performed.

Further, in the traveling vehicle 2 according to the third aspect, of the covers 75, 82 divided into a plurality of parts on the left and right, the integral cover 75 at the center in the left-right direction of the vehicle body is removed or moved. As a result, the maintenance of the transmission 11 including the transmission operation linking mechanism or the maintenance of the transmission mechanism from the prime mover 4 to the transmission 11 can be performed, so that the transmission 11 and the transmission operation related to the transmission 11 can be performed. The connecting mechanism or the transmission mechanism can be arranged near the center in the left-right direction of the vehicle body.

Further, the traveling vehicle 2 according to a fourth aspect of the present invention is characterized in that the right and left sides of the vehicle body are located above at least a part 82d of the cover 82 on the outer side in the left and right direction among the covers 75 and 82 divided into a plurality of right and left parts. The cover 75 at the center in the horizontal direction is overlapped, and the cover 82 at the outer side in the horizontal direction can be moved upward by removing or moving the cover 75 at the center in the horizontal direction of the vehicle body. It has become.

The traveling vehicle 2 according to a fifth aspect of the present invention is an integrated cover 7 of the divided covers 75, 81, 82.
5 is moved with respect to the traveling vehicle body to open the cover 75, and the operating tool 79 normally protruding from the integrated cover 75.
Thereby, the cover 75 can be fixed in an open state.

[0015]

Therefore, the traveling vehicle 2 according to claim 1 is
By removing or moving the integral cover 75, maintenance related to the transmission 11 including the transmission operation linking mechanism can be performed, and when performing maintenance related to the transmission 11, a plurality of covers can be removed or It is not necessary to move the vehicle, and it is possible to easily implement maintenance related to the transmission 11 without having to separate the cover that covers the traveling vehicle body from above.

Further, in the traveling vehicle 2 according to the second aspect, maintenance of the transmission mechanism from the prime mover 4 to the transmission 11 can be performed by removing or moving the integral cover 75, and the transmission When performing maintenance of the mechanism, it is not necessary to remove or move a plurality of covers, and it is easy to maintain the transmission mechanism without dividing the cover that covers the traveling vehicle body from above unnecessarily. That can perform the following.

The traveling vehicle 2 according to a third aspect of the present invention is provided with an integral cover 75 which is removed or moved at the time of performing maintenance on the transmission 11 or the transmission mechanism at a central portion in the left-right direction of the vehicle body. Therefore, not only can the maintenance of the transmission device 11 or the transmission mechanism be easily performed, but also the relatively heavy transmission device 11 relationship or the transmission mechanism can be disposed near the center in the left-right direction of the vehicle body. The weight balance in the left-right direction can be improved.

Further, the traveling vehicle 2 according to a fourth aspect of the present invention has a configuration in which the cover 82 at the left-right outer side can be moved upward by removing or moving the cover 75 located at the center in the left-right direction of the vehicle body. Therefore, unless the cover 75 at the center in the left-right direction is removed or moved, the cover 82 at the outer portion in the left-right direction does not move upward, and the cover 75 at the center at the left-right direction does not move. Thereby, the cover 82 on the outer side in the left-right direction can be fixed. The cover 75 at the center in the left-right direction can be removed or moved regardless of the cover 82 at the outer portion in the left-right direction.

Further, the traveling vehicle 2 according to the fifth aspect has a structure in which the cover 75 can be fixed in an open state by the operating tool 79 normally projecting from the integral cover 75, so that the cover is particularly special. The operating tool 79 can also be used as a fixing tool without requiring a fixing tool for fixing the −75 in an open state.

[0020]

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 and FIG. 2 show a riding type rice transplanter 1. The riding type rice transplanter 1 includes a traveling vehicle 2.
And a 6-row seedling planting section 3.

An engine 4 serving as a prime mover is provided at substantially the center of the front and rear and left and right sides of the traveling vehicle 2. An engine output pulley 5 provided on the left side of the engine 4 is connected to a relay pulley 7 via a transmission belt 6. The integrally rotating relay shaft 8 is driven. The drive of the relay shaft 8 is input to the hydraulic pump 9. Therefore, the hydraulic pump 9 is driven with the driving of the engine 4. The power of the relay shaft 8 is transmitted to an auxiliary transmission 11 having a transmission belt 10 for transmission, and a main transmission (not shown) having a main clutch (not shown) capable of cutting off the transmission from the auxiliary transmission 11. -Transmitted to the gear 12. The auxiliary transmission 11 is configured to change gears by changing the pulley diameters of the drive pulley 13 and the driven pulley 14 around which the transmission belt 10 is wound. A pair of left and right front wheels 16 are driven and rotated by the front wheel drive shafts 15 projecting from the left and right ends of the main transmission case 12 by the power from the main transmission case 12, respectively. A rear wheel drive shaft 19 which is transmitted from the case 12 through the left and right rear wheel transmission shafts 17 into the left and right rear wheel transmission cases 18 and is provided on the rear wheel transmission case 18.
, The left and right rear wheels 20 are respectively driven. Note that the rear wheel 20 is connected to the main mission case.
The left and right rear wheel transmission cases are provided on both left and right ends of a rear wheel rolling frame 23 which is rotatable around a rotation shaft 22 in the front-rear direction with respect to a main frame 21 fixed to the rear end of the frame 12. S1
8 is fixedly supported and is provided so as to be freely rollable in the left-right direction with respect to the main frame 21 so as to follow the unevenness of the plow in the field. Therefore, this traveling vehicle 2
The front wheels 16 and the rear wheels 20, which are traveling devices, are driven to travel.

The auxiliary transmission 11 includes a drive pulley 13 that rotates integrally with the relay shaft 8, a driven pulley 14 that rotates integrally with an input shaft 24 to the main transmission case 12, and the drive pulley. 13 and a speed change transmission belt 10 wound around the driven pulley 14. The drive pulley 13 and the driven pulley 14 include left and right pulley portions 13a, 13b, 1 with which the transmission belt 10 contacts.
Reference numerals 4a and 14b denote separate pulleys, and the effective diameter around which the transmission belt 10 is wound is changed by changing the interval between the left and right pulley portions 13a, 13b, 14a and 14b. It is configured to be possible.

The drive pulley 13 will be described.
The left pulley 13a of the drive pulley 13 is fixed to the relay shaft 8, and the right pulley 13b is configured to be slidable in the axial direction of the relay shaft 8, that is, in the left-right direction. The right and left positions of the rear portion 13b are regulated by a drive-side speed change operation cam 26 rotating via a bearing 25. The side of the drive-side speed change operation cam 26 opposite to the drive pulley 13 (the main transmission cage).
A projection 26a is formed on the end surface of the main transmission case 12 at an angle in the circumferential direction. The drive roller 27 attached to the main transmission case 12 comes into contact with the projection 26a. I have. A shift rod 28 is connected to a first arm 26b of the drive-side shift operation cam 26. When the drive-side shift operation cam 26 is rotated by the forward and backward movement of the shift rod 28, the drive-side shift operation is performed. The contact point of the ridge 26a of the cam 26 with the driving roller 27 changes along the circumferential direction,
The main part of the drive-side shift operation cam 26 moves in the left-right direction, the right pulley 13b moves left and right, and the left pulley 1
The effective diameter of the drive pulley 13 is changed by changing the interval between 3a and 13b.

Next, the driven pulley 14 will be described. The right pulley 14b of the driven pulley 14 is fixed to the input shaft 24 to the main transmission case 12, and the left pulley 14a is The left pulley portion 14a is configured to be slidable in the axial direction of the input shaft 24, that is, in the left-right direction. On the end face of the driven-side shift operation cam 30 on the side opposite to the driven pulley 14 (left side), there is provided a ridge 30a formed to be inclined along the circumferential direction.
A driven roller 32 attached to a support plate 31 fixed to the body abuts on a. A connecting rod 33 is connected to the arm 30b of the driven-side speed-change operation cam 30 and to the second arm 26c of the drive-side speed-change operation cam 26. When the driven-side speed change operation cam 30 rotates due to the forward and backward movement of the connecting rod 33, the contact point of the ridge of the driven-side speed change operation cam 30 with the driven-side roller 32 changes along the circumferential direction. The main portion of the driven-side speed change operation cam 30 moves in the left-right direction, and the left pulley portion 14a moves left and right.
The right and left pulleys 14a, 14a of the driven pulley 14 are in a direction opposite to the change in the distance between the left and right pulleys 13a, 13b.
The effective diameter of the driven pulley 14 is changed by changing the interval of the driven pulley 14b. Therefore, when transmitting at a high speed, the width of the drive pulley 13 is narrowed to make the drive pulley 1
The effective diameter of the driven pulley 14 is reduced by increasing the effective diameter of the driven pulley 14 and widening the lateral width of the driven pulley 14. Conversely, when transmitting at low speed, the left and right width of the drive pulley 13 is widened to reduce the effective diameter of the drive pulley 13 and the left and right width of the driven pulley 14 is widened. Re 14
To reduce the effective diameter. As a result, both the left and right widths of the drive pulley 13 and the driven pulley 14 are changed, so that the auxiliary transmission 11 can shift a wide range.

A cockpit 35 is provided above the engine 4.
A steering handle 36 is provided in front of the cockpit 35. A lifting link mechanism 3 is provided at the rear of the traveling vehicle 2.
7, the seedling mounting part 3 is mounted via the lifting link mechanism 37, and the seedling mounting part 3 is expanded and contracted by a hydraulic raising / lowering cylinder 39 operated via a hydraulic pressure switching valve 38 by hydraulic pressure from a hydraulic pump 9. 3 is configured to move up and down.
The seedling planting section 3 is configured to operate by transmitting power from the inside of the main transmission case 12 by a planting transmission shaft 40 provided so as to pass rightward of the engine 4. I have. A planting clutch case 41 is provided in the middle of the planting transmission shaft 40, and the planting clutch case 41 is provided.
The drive of the seedling planting section 3 can be turned on and off within the box 41.

The seedling planting section 3 is provided with a seedling mounting table 42, a planting transmission section 43, and a seedling planting device 44 for each strip. The planting section to which the power of the planting transmission shaft 40 is input is provided. Transmission part 43
It operates by being transmitted through the. In the lower part of the seedling planting section 3, a center float 46 is provided at the center and side floats 47 are provided at both sides, and these floats 46, 47 slide on the field scene. . The floats 46 and 47 are respectively provided with left and right pivot shafts 48.
The floats 46 and 47 are vertically rotatable depending on the unevenness of the field scene. Further, a floating angle detection link 46a is provided above the front of the center float 46, and the vertical angle of the center float 46 is increased by the floating angle detection link 46a. The angle is detected. Then, the hydraulic switching valve 38 is actuated via the angle-of-attack detection wire 49 connected to the float angle-of-attack detection link 46a, and the center float 46 is lowered with the seedling placement part 3 lowered. The raising and lowering of the seedling planting section 3 is controlled so that the angle of attack becomes a predetermined value, so that the seedling planting section 3 is maintained at a predetermined height from the field scene.

The seedling planting section 3 is provided so as to be able to roll left and right with respect to the traveling vehicle 2 around a rolling shaft 50 in the front-rear direction, and a lateral inclination angle speed sensor 51 provided on the traveling vehicle 2 side. And a rolling hydraulic cylinder 53 whose base is provided on the traveling vehicle 2 side so as to be absolutely horizontal left and right based on the detection value of the right and left inclination angle sensor 52 provided on the side of the seedling planting section 3.
And the left-right inclination posture is controlled. The rolling hydraulic cylinder 53 is provided to be inclined along the inclination direction of the seedling mounting table 42 which is inclined forward and backward, and is arranged so as to effectively use the space on the front side of the seedling mounting table 42. ing.

The seedling mounting table 42 is supported by a seedling mounting table support roller 54 at an upper part and a left and right moving guide plate 55 so as to be movable left and right. The seedling placement unit 3 moves the seedling placement table left / right moving rod 56 to which the seedling placement table 42 is fixed, in accordance with the operation of the seedling placement apparatus 44, and moves the seedling placement table 42
Are moved left and right, and a mat-shaped seedling is scraped off by a seedling plant 44 one by one. The right and left moving guide plate 55 has a seedling scraping opening 55 of the seedling planting device 44.
a is provided. Therefore, the seedling mounting table 42 serves as a seedling supply device that supplies seedlings one plant at a time to the seedling extraction position 55a where the seedling placement device 44 extracts the seedlings by moving left and right. still,
When the seedling placement device 44 takes out the seedlings, the seedling placement table left / right moving rod 56 is provided by a seedling supply transmission unit (not shown) provided in the planting transmission unit 43 so that the left / right movement speed of the seedling placement table 42 is reduced.
Are moved unequally to the left and right, and the right and left moving speed of the seedling mounting table 42 is changed at an unequal speed in the same cycle as the seedling removal cycle of the seedling planting device 44.

The seedling mounting table 42 includes a seedling feed belt 5
7 are provided. The seedling feed belt 57 of each strip is wound around a lower driving roller 58 and an upper driven roller 59. At the end of the left and right movement of the seedling mounting table 42, the driving roller 58 rotates by a predetermined amount by the power from the planting transmission unit 43, and the seedling feeding belt 57 places the mat-shaped seedlings on the seedling planting device 44 side. It is configured to transfer sequentially in fixed amounts.

The seedling planting device 44 has a drive shaft which is output from the rear end of the planting transmission frame 43a of the planting transmission part 43 and rotates at a constant speed in proportion to the running speed of the machine body. 60
Case 61 which is driven to rotate by the
And a seedling attachment 62 attached to both ends of the seedling 61, respectively.
The seedlings on 5a are scraped and the scraped seedlings are planted in a field.

The stepped portion 75b in front of the cockpit 35 of the traveling vehicle 2 is provided with a stepped inter-unit shift lever -6.
The operation speed of the seedling planting section 3 with respect to the traveling speed of the traveling vehicle 2 can be shifted by the inter-stock shift lever 63. The inter-plant shift lever 63 allows the planting operator to set the interval between the planted plants to be transplanted to the field. Therefore, the inter-stock shift lever-6
As long as 3 is not operated, the seedling planting section 3 operates at a speed proportional to the running speed. The main transmission case 12 is provided with an inter-stock transmission unit 12a that changes the engagement of the gears to change the speed.
By operating the gear 3, the shift operation of the inter-stock transmission unit 12a is performed.

In the traveling vehicle 2, a main transmission lever 6 capable of stepped transmission is provided on the left side of the steering handle 36.
A "road running speed" position in which the engagement of the gears in the main transmission case 12 is changed by operating the lever 64 to increase the speed in the forward direction, and a low speed in the forward direction used during the normal planting operation. The "planting work speed" position, the "reverse" position for moving the traveling vehicle 2 backward, and the "neutral" position for cutting off the transmission to the front wheel 16, the rear wheel 20 and the seedling planting section 3 are switched. On the right side of the cockpit 35, a sub-transmission lever 65 capable of changing the transmission ratio of the sub-transmission 11 and a planting / elevating lever capable of operating the raising and lowering of the planting portion 3 and the turning on and off of the drive. 66 are provided. In addition, the planting / elevating lever 6
6 is provided with a lowering control lever 67 capable of restricting the lowering operation of the seedling planting section 3 irrespective of the operation of the planting / elevating lever 66.
Is provided.

Referring to FIG. 7 and FIG.
A description will be given of an operation link configuration from the sub-transmission lever 65 to the sub-transmission device 11.
A speed change shaft 70 extending in the left-right direction rotates via an operation rod 68 connected to 65 and a speed change arm 69 connected to the other end of the operation rod 68. When the transmission shaft 70 rotates, the transmission operation arm 71 that rotates integrally with the shaft 70 rotates, and the transmission operation arm 71 and the first transmission operation cam 26 of the drive pulley 13 on the drive pulley 13 move. The speed change rod 28 connecting the arm portion 26b moves forward and backward, and changes the left and right widths of the drive pulley 13 and the driven pulley 14 to change the speed. The transmission rod 28 is of a turn buckle type in which the rod length is changed by loosening and rotating a lock nut 28a, and the auxiliary transmission lever is changed by adjusting the rod length of the transmission rod 28. The correspondence between the operation position 65 and the gear ratio of the auxiliary transmission 11 is adjusted. At the left end of the transmission shaft 70, there is provided a transmission positioning plate 72 which rotates integrally with the transmission shaft 70, and a plurality of positioning grooves 72a provided on the outer periphery of the transmission positioning plate 72 are provided respectively. Positioning row to engage
A gear 73 is provided, and the speed of the auxiliary transmission 11 is changed to a plurality of steps. In addition, the positioning roller 73 is provided at the rotating tip of the positioning roller arm 73a and the positioning roller arm 73a.
Are biased toward the speed change positioning plate 72 by a tension spring 73b provided at the second position. These speed change positioning plate 72, positioning roller 73 and tension spring 7
3b and the like prevent the auxiliary transmission lever 65 from automatically returning to the low speed side due to the load in the transmission of the auxiliary transmission device 11. Also, the speed-change arm 71 has a low-speed interlocking wire 7.
The other end of the low-speed interlocking wire 74 is connected to an elevating link mechanism 37 that moves the seedling placement part 3 up and down. Accordingly, when the seedling placement part 3 is raised to the highest position, the low-speed interlocking wire 74 is pulled, and the speed-change operation arm 71 is turned to the low-speed side, so that the sub-transmission 11 and the sub-speed lever are rotated. 65 is automatically operated to the low speed side. As a result, the running speed can be reduced in conjunction with the raising of the seedling planting section 3 when the airframe turns on the ridge in the field, so that the speed change operation of the operating speed by the auxiliary speed lever 65 of the operator is performed. Is unnecessary, the operation during turning can be simplified, and the turning of the aircraft can be performed safely.

As shown in FIG. 8, the operation linking structure from the sub-transmission lever 65 to the sub-transmission 11 is as follows.
The main part except the shift operation arm 69 is disposed below a center cover 75 which covers a traveling vehicle body, which will be described later, from above. The transmission rod 28 and the drive pulley 13 side of the auxiliary transmission 11 are disposed below the center cover 75.

A throttle lever 76 is provided on the right side of the steering handle 36 to adjust the rotation speed of the engine 4 so that the set rotation speed of the engine 4 can be adjusted by operating the lever 76 in the front-rear direction. Has become. A main clutch pedal 77 is provided on the left side below the steering handle 36.
The main clutch (not shown) in the main transmission case 12 is operated by the depressing operation to cut off the power to the running wheels 16, 20 and the seedling planting section 3. The right and left rear wheels 2 are located on the right side below the steering handle 36.
A brake pedal 78 for braking each 0 is provided. A front wheel differential lock pedal 79 is provided in a step portion 75b on the front side of the cockpit 35, and a differential lock claw (not shown) in the main transmission case 12 is operated by depressing the front wheel differential lock pedal 79 to the left and right. Is driven at a constant speed. still,
The front wheel differential lock pedal 79 is configured to operate the differential lock shifter 80 by contacting the differential lock shifter 80 for operating the differential lock claw from above. It has a configuration that allows it.

The traveling vehicle 2 has a hood cover 8 forming a post of a front steering handle 36.
1. Side covers 82 and hood covers 81 provided on the left and right sides of the vehicle 2 from the front end to the rear end, respectively.
On the rear side, a center cover 75 provided between the left and right side covers 82 is provided to cover the traveling vehicle body from above. The center cover 7
The rear portion 5 is provided with a rising portion 75a that rises upward, the engine 4 is provided below the rising portion 75a, and the cockpit 35 is provided above the rising portion 75a. In addition, the front part of the center cover 75, which is the front side of the rising part 75a,
The step portion 75b has a substantially horizontal surface. The transmission belt 6 from the engine 4 to the auxiliary transmission 11 is located at the center.
The cover 75 is disposed below the step portion 75b. Also, a center located on the rear side of the rising portion 75a.
The rear end of the cover is a substantially horizontal rear step portion 75c. The left and right side covers 82 have an inclined portion 82a which is inclined forward and backward near the rear wheel 20 along the outer circumference of the rear wheel 20, and a front step portion 82b of the inclined portion 82a and a rear rear step. And a portion 82c. Incidentally, the step portion 82b and the rear step portion 82c are formed in a substantially horizontal plane. Also, the step portion 82b of the left and right side covers 82 and the step portion 75b of the center cover 75 are flush with each other, so that both step portions 75b and 82b can be freely moved. The rear step portion 82c of the left and right side covers 82 and the rear step portion 75c of the center cover 75 are flush with each other.
5c and 82c can be freely moved back and forth.

Further, as shown in FIG.
At the outer end of 82, slit-shaped viewing holes 83 and 84 are provided at the front and rear portions. Therefore, with the operator sitting in the cockpit 35, the front wheel 1
The rear wheel 20 can be visually recognized through the visual recognition hole 84 at the rear part, and the front and rear wheels 1 in the history when loading on a truck or the like.
The positions of 6, 20 can be confirmed, and the aircraft can be safely driven.

The upper surface of each of the left and right side covers 82 has a stepped configuration in which the end 82d on the center cover 75 side is lower than the main part. The left and right ends 75d of the center cover 75 are connected to the side covers.
The upper end 82d of the end portion 82d overlaps the lower surface. Further, a concave portion 85 which is recessed downward is provided on an upper surface of an appropriate portion of the end portion 82d of the left and right side covers 82 on the center cover 75 side, and the center cover 75 which matches the concave portion 85 is provided. Axial projections 86 are provided at symmetrical positions on the left and right ends of the lens. Therefore, the center cover 75 is mounted from the upper side so that the concave portion 85 and the projecting portion 86 coincide with each other, and the center cover 75 is turned upward around the left and right pivots on the projecting portion 86. Is rotated. still,
When turning the center cover 75 upward,
The lever length of the inter-shift lever 63 and the lever hole of the lever 63 in the center cover 75 so that the inter-shift lever 63 projecting from the step portion 75b of the cover 75 does not interfere with the center cover 75. 87 are configured.

It should be noted that, as shown in FIG.
A pin 8 provided on the fuselage side is provided at a portion where the two covers 75 and 82 on the rotation front end side of the base 75 and the rear side of the side cover 82 overlap.
8 are provided, and the pin 88 is inserted into the pin hole 89 of the center cover 75 with the pin 88 inserted into the pin hole 90 of the side cover 82, and the center cover is inserted. The center cover 75 and the side cover 82 are fixed by attaching a retaining member 91 for preventing the upward movement of the center cover 75 to the pin 88.

When turning the center cover 75 upward, the stopper 91 is removed and the front wheel differential lock pedal 79 projecting from the step portion 75b of the center cover 75 is pulled out. -Rotate the cover 75 upward. Then, as shown in FIG. 11, when it is desired to hold the center cover 75 rotated upward, the pulled-out front wheel differential lock pedal 79 is inserted into a pedal insertion hole 92 provided in the rear portion of the traveling vehicle 2. As a result, the front wheel differential lock pedal 79 is held in a state of protruding upward from the pedal insertion hole 92, and the rear end of the center cover 75 is placed on the upper end of the front wheel differential lock pedal 79, so that the center cover 75 is mounted. It is held in a state of being turned upward. The upper portion of the rising portion 75a of the center cover 75 is configured to be detachable from the base portion.
The base 81 and the side cover 82 are separate from each other, and can be detached from the vehicle body or rotated upward integrally with the base. Accordingly, the center cover 75 as a whole is an integral cover.

By the way, the edge 8 not adjacent to the center cover 75 of the step portion 82b of the left and right side covers 82.
As shown in FIG. 12, a plurality of projections 93 are provided at predetermined intervals in 2e, and holes 93a penetrating below the side cover 82 are provided on the upper surface of the projections 93. When the worker gets on the traveling vehicle 2 from around the traveling vehicle 2, the protrusion 93 allows the foot to slide on the edge 82 e of the step portion 82 b of the side cover 82 due to mud in the field adhered to the shoes. Can be suppressed, and it is possible to get on safely. Further, since the hole 93a is provided on the upper surface of the projection 93, the step portion 82b of the side cover 82 can be removed from the shoe.
Mud and the like on the edge 82e of the side cover 82 are discharged from the hole 93a below the side cover 82, and the state where mud and the like remain on the edge 82e of the step portion 82b of the side cover 82 can be suppressed. A person can ride safely without slipping on the edge 82e.

As shown in FIGS. 13 and 14, when a groove 93b is provided on the upper surface of the projection 93, mud or the like adhering to the shoes is efficiently scraped off by the hole 93a, and the step of the side cover 82 is further improved. Mud or the like can be suppressed from being placed on the edge 82e of the portion 82b, and the foot can be prevented from sliding on the edge 82e. Note that the projections 93 need not be circular in plan view, and may be square in plan view as shown in FIG.

As described above, the traveling vehicle 2 of the riding type rice transplanter 1 travels by transmitting the power from the engine 4 to the front wheels 16 and the rear wheels 20 via the auxiliary transmission 11 and travels.
1 is provided with a sub-shift lever 65 for performing a shift operation, and a cover for covering the traveling vehicle body from above is divided into a plurality of parts by a center cover 75 and a side cover 82, and a cover below the center cover 75 is provided. The sub-transmission lever including the drive pulley 13 side of the sub-transmission 11 and the transmission rod 28
A main part of a speed change link mechanism from 65 to the auxiliary transmission 11 is arranged.

Accordingly, the traveling vehicle 2 covers, from above, the drive pulley 13 side of the subtransmission device 11 and the main part of the mechanism for linking the speed change operation from the subtransmission lever 65 to the subtransmission device 11. Since the cover is composed only of the integral center cover 75 of the plurality of divided covers, by removing the center cover 75 or rotating it upward, the rod of the transmission rod 28 can be removed. Maintenance related to the auxiliary transmission device 11 including the speed change operation linking mechanism such as length adjustment can be performed. Therefore, it is not necessary to remove or move the plurality of covers including the side cover 82 when performing maintenance related to the auxiliary transmission 11, and the cover that unnecessarily covers the traveling vehicle body from above is divided. It is possible to adopt a machine structure for easily performing maintenance related to the auxiliary transmission device 11 without performing.

In the traveling vehicle 2, the engine 4 and the drive pulley 13 of the auxiliary transmission 11 are disposed below the center cover 75, and the engine 4 is disposed below the center cover 75. Transmission belt 6 from 4 to auxiliary transmission 11
And a transmission mechanism from the engine 4 to the drive pulley 13 side of the auxiliary transmission 11.

Accordingly, the traveling vehicle 2 has an integral center cover among a plurality of divided covers that cover the engine 4 and the drive pulley 13 of the auxiliary transmission 11 from above. Since only the −75 is used, maintenance of the transmission mechanism from the engine 4 to the auxiliary transmission 11 can be performed by removing or turning the center cover 75 upward. Therefore, when performing maintenance on the transmission mechanism, the side cover 82
It is not necessary to remove or move a plurality of covers including the above, and the body structure for easily performing the maintenance of the transmission mechanism without dividing the cover that covers the traveling vehicle body from above unnecessarily. can do.

The traveling vehicle 2 has a center cover.
A cover that covers the running vehicle body from above is provided by being divided into right and left parts by the right and left side covers 75 and the right and left center parts of the vehicle body in the divided cover, that is, between the left and right pair of front and rear wheels 16 and 20. Center cover 7 in the center
5, a drive pulley 1 of the engine 4 and the auxiliary transmission 11
Three sides are arranged.

Therefore, the traveling vehicle 2 can be shifted by removing only the center cover 75 at the center in the left-right direction of the vehicle body from the plurality of covers divided into right and left, or by rotating the cover upward. Since the maintenance of the auxiliary transmission 11 including the linkage mechanism or the maintenance of the transmission mechanism from the engine 4 to the auxiliary transmission 11 can be performed, the auxiliary transmission 11 and the transmission operation linkage related to the auxiliary transmission 11 or The transmission mechanism can be arranged near the center in the left-right direction of the vehicle body. Therefore, not only the maintenance of the auxiliary transmission device 11 or the transmission mechanism can be easily performed, but also the relatively heavy engine 4, the auxiliary transmission device 11, or the transmission mechanism is disposed near the center in the left-right direction of the vehicle body. As a result, the weight balance in the left-right direction of the vehicle body can be improved.

Further, in the traveling vehicle 2, the end 82d of the side cover 82 on the center cover 75 side of the outer side in the left-right direction of the divided cover is used as the center cover 75.
Are arranged below the left and right ends 75d.
Accordingly, the traveling vehicle 2 has a configuration in which the side cover 82 can be moved upward by removing the center cover 75 or rotating the center cover 75 upward.
Therefore, the side cover 82 does not move upward unless the center cover 75 is removed or turned upward, and the side cover 82 can be fixed by the center cover 75. The center cover 75 can be removed or rotated upward regardless of the side cover 82.

The traveling vehicle 2 has a center cover.
Front wheel differential lock pedal 7 operated by the operator from 75
9 is projected, and the center cover 7 is provided.
5 is rotated upward with respect to the traveling vehicle body to provide the center cover 75 so as to be openable and closable, and a fixing tool for fixing the center cover 75 in an open state is provided by moving the front wheel differential lock pedal 79 to the traveling vehicle. The rear wheel 2 is also used as the front wheel differential lock pedal 79 by being inserted into a pedal insertion hole 92 provided at the rear of the rear wheel 2.

Therefore, the traveling vehicle 2 is connected to the center
Rotate the cover 75 upward to open the cover 75,
The center cover 75 can be fixed in an open state by the front wheel differential lock pedal 79 normally protruding from the center cover 75. Therefore, there is no need for a fixing tool for fixing the center cover 75 in an open state,
The front wheel differential lock pedal 79 can be used also as a fixture.

FIGS. 15 and 16 show the center.
In preventing the cover 75 and the side cover 82 from moving upward, the pin 88 and the stopper 91 described above are used.
This is of a configuration different from that of the vehicle 1 in which a retaining pin 96 provided rearward at the rear end of the frame 95 of the traveling vehicle 2 is used. The retaining pin 96
The distal end portion 96b has a larger diameter than the intermediate portion 96a. A pin hole 97 into which the retaining pin 96 is inserted is provided on the rear surface of the rear end of the center cover 75. The pin hole 97 has a lower large-diameter circular hole portion 97a and an upper small-diameter long hole. It has a shape connected to the hole 97b. The diameter of the circular hole 97a is slightly larger than the diameter of the tip 96b of the retaining pin 96.
6a, the tip 96b of the retaining pin 96 having substantially the same diameter.
Is configured to be narrower than the diameter.

Therefore, with the side cover 82 over the vehicle body, the center cover is positioned from above the side cover 82.
When the two covers 75 and 82 are mounted with the cover 75, the center cover 75 is slightly pulled rearward so that the retaining pin 96 is inserted into the circular hole 97 of the pin hole 97 of the center cover 75.
a, and the circular hole 97a is sunk into the tip 96b of the retaining pin 96. Then, by pushing the center cover 75 downward, the long hole portion 97b of the pin hole 97 is pressed.
The middle part 96a of the retaining pin 96 is engaged with the
In this configuration, the cover 75 is fixed. In addition, side cover
82 is fixed because a part thereof overlaps below the center cover 75. As a result, the center cover 75 and the side cover 82 can be easily fixed by a simple mechanism.

Although the embodiment of the present invention has been described with respect to the traveling vehicle 2 of the riding type rice transplanter 1 as an example of the traveling vehicle, the present invention is not limited to the riding type rice transplanter.

[Brief description of the drawings]

FIG. 1 is a side view of a riding rice transplanter.

FIG. 2 is a plan view of a riding type rice transplanter.

FIG. 3 is a plan view showing a part of a traveling vehicle.

FIG. 4 is a partially exploded plan partial sectional view showing the auxiliary transmission.

FIG. 5 is a front view showing a seedling planting part.

FIG. 6 is a side view showing a seedling planting part.

FIG. 7 is a side view showing an operation linking configuration from the auxiliary transmission lever to the auxiliary transmission.

FIG. 8 is a plan view showing an operation linking configuration from the auxiliary transmission lever to the auxiliary transmission.

FIG. 9 is a plan view showing a center cover and a side cover.

FIG. 10 is a perspective view showing a center cover and a side cover.

FIG. 11 is a perspective view showing a state where the center cover is turned upward.

FIG. 12 is a perspective view showing an edge of a side cover.

FIG. 13 is a perspective view showing an edge portion of a different side cover.

FIG. 14 is a perspective view showing edges of different side covers.

FIG. 15 is a perspective view showing a configuration for preventing upward movement of different center covers and side covers.

16 is a rear view showing the rear ends of the center cover and the side cover in FIG.

[Explanation of symbols]

2 ... running vehicle, 4 ... engine, 11 ... auxiliary transmission, 16
... front wheel, 20 ... rear wheel, 65 ... auxiliary transmission lever, 75 ... center cover, 79 ... front wheel differential lock pedal, 81 ... bonnet cover, 82 ... side cover, 82d ... side cover on the center cover side edge

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor, Hisashi Kamiya, 1st Hachikura, Tobe-cho, Iyo-gun, Ehime Prefecture, Iseki Agricultural Machinery Co., Ltd. Within the Technical Department (72) Inventor Yoshihiro Fukumura 1-Yachikura, Tobe-cho, Toyo-cho, Iyo-gun, Ehime Prefecture Iseki Agricultural Machinery Co., Ltd. 2B062 AB01 BA01 BA11 BA19 BA22 3D039 AA03 AA04 AB12 AB14 AC21 AC40 AD12 AD22 AD25 AD35 AD36 AD54

Claims (5)

[Claims] 1. A traveling vehicle having a structure in which an airframe travels by being transmitted from a prime mover 4 to traveling devices 16 and 20 via a transmission 11 and provided with a shift operation tool 65 for performing a shifting operation of the transmission 11. A cover 75 for covering the vehicle body from above,
81 and 82 are provided by being divided into a plurality of parts, and an integral cover 75 among the divided covers 75, 81 and 82 is provided.
A traveling vehicle in which the transmission 11 and a transmission operation linking mechanism from the transmission operating tool 65 to the transmission 11 are disposed below the transmission 11. 2. A traveling vehicle having a configuration in which an airframe travels by transmitting power from a prime mover 4 to traveling devices 16 and 20 via a transmission 11 to cover the traveling vehicle body from above.
1 and 82 are divided into a plurality of parts, and the prime mover 4 and the transmission 11 are arranged below an integral cover 75 among the divided covers 75, 81 and 82. Traveling vehicle. 3. A cover 75, 8 for covering the traveling vehicle body from above.
1, 82 at least partially divided into right and left parts, and the transmission 11 is arranged below an integrated cover 75 at the center in the left-right direction of the vehicle body among the divided covers 75, 82. The traveling vehicle according to claim 1 or 2, wherein: 4. A structure in which at least a part 82d of the outer cover 82 in the left-right direction of the divided covers 75, 82 overlaps below the integrated cover 75 in the center portion in the left-right direction of the vehicle body. The traveling vehicle according to claim 3, wherein: 5. An operating tool 79 operated by an operator from an integral one of the divided covers 75, 81, 82.
And the cover 75 from which the operating tool 79 protrudes is moved with respect to the traveling vehicle body so that the cover 75
5. The operation tool 79, wherein a fixing device is provided so as to be openable and closable, and the cover 75 is fixed in an open state. 6. Traveling vehicle.