JPH11103613A - Apparatus for attaching working machine to riding management working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of the increase of longitudinal length of a lifting apparatus in the case of attaching a working machine to the belly part of a tri-cyclic riding-type management working machine having one wheel at the front part and two wheels at the rear part. SOLUTION: This working machine attaching apparatus liftably attaches a working machine to the belly part of a machine body frame 1 between front wheel and rear wheels. The lifting part of the lifting apparatus is attached to the machine frame 1 in vertical direction, the attaching part of the lifting apparatus is made to be movable in vertical direction and a hydraulic cylinder 22 is used as the lifting part. As an alternative, an end of a chain is fixed to the machine body frame, the other end is fixed to the attaching part and the middle part of the chain is wound on a sprocket pivoted on the tip end of the piston rod of the hydraulic cylinder.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work for suspending a work machine disposed on the abdomen of a riding type three-wheel management work vehicle that supports one front wheel and two rear wheels at front and rear portions of a rod-shaped body frame that is long in the front-rear direction. The present invention relates to a configuration of a machine mounting device.

[0002]

2. Description of the Related Art In the prior art, a three-wheel drive type in which a body frame is arranged in the front-rear direction, one front wheel is arranged as a steering wheel at a front part of the body, and two rear wheels are arranged at a rear part. An upper body frame is arranged, a power unit is arranged at a rear portion of the aircraft frame, a driving unit is arranged above the power unit, a work machine is arranged at an abdomen between front wheels and rear wheels, and a work machine mounting device is provided. 2. Description of the Related Art A riding type working machine suspended by using a conventional type is known. The work equipment mounting device of this riding management work machine arranges links up and down,
A parallel link is formed in connection with the hitch on the working machine side, and the structure is configured to be moved up and down using a lifting cylinder.

[0003]

However, in the prior art, the working machine locked by the mounting portion of the working machine mounting device moves up and down in a circular arc, so that the working machine does not contact the working vehicle. Extra space is required to attach the work equipment to the equipment. Also, since the mounting portion of the work machine mounting device draws an arc and moves up and down, it is difficult to predict the trajectory of the mounting portion when mounting the working machine on the simple detachable work machine mounting device (auto hitch), It is difficult to predict where to place the work implement when installing the work implement. It is also possible to use a three-point link type working machine mounting device. However, in the case of a three-point link type or parallel link type working machine mounting device, since the link becomes long in the front-back direction, the space in the front-back direction of the abdomen is used. Had to be made larger, and the overall length was longer.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a work machine mounted on an abdomen between a front wheel provided on a front portion of a body frame and a rear wheel provided on a rear portion thereof, and is capable of moving up and down. In the working machine mounting device, the lifting drive of the lifting device is provided in the body frame in the vertical direction, the mounting portion of the lifting device is configured to be vertically movable, and the lifting drive is a hydraulic cylinder, or In the elevating drive unit, one end of a chain is fixed to a body frame, the other end is fixed to a mounting part, and an intermediate part of the chain is wound around a sprocket pivotally supported at a tip of a piston rod of a hydraulic cylinder. .

[0005]

Embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is an overall side view of a riding management work vehicle in a state where a middle tillage rotary is mounted on an abdomen. FIG. 2 is an overall plan view of the riding management work vehicle. FIG. 3 is a partial side sectional view showing a body frame provided with a power transmission configuration. FIG. 4 is a partial side view showing the body frame provided with the power transmission configuration. FIG. 5 is a plan view showing the front part of the riding management work machine. FIG. 6 is a partial rear view showing the configuration of the work implement mounting device. FIG. 7 is a partial plan view and a partial cross-sectional view showing the configuration of the work implement fixture. FIG. 8 is a partial side view showing the configuration of the work implement mounting device. FIG. 9 is a side view showing a state in which the working machine is mounted using the caster attachment and removal frames. FIG. 10 is an overall side view of a riding management work vehicle showing a second embodiment of the present invention. FIG. 11 is a side sectional view showing the configuration of the work implement mounting device. FIG. 12 is a partial plan sectional view showing the configuration of the work implement mounting device. FIG. 13 is an overall side view of a riding management work vehicle showing an embodiment in which the wheel base width is made variable. FIG. 14 is a partial side cross-sectional view showing the body frame provided with the power transmission mechanism. FIG.
5 is a partial side sectional view of the body frame. FIG.
FIG. 2 is a partial side view of the body frame.

Referring to FIGS. 1 and 2, the overall configuration of a three-wheeled riding management work vehicle 71 will be described. The three-wheeled riding management work vehicle 71 includes a driving unit 72 having a body frame 1 that is long in the front-rear direction.
An engine 73 is mounted on the rear end of the body frame 1, the running speed is changed by a transmission case 74, and a rear axle case 4 disposed below the transmission case 74 through a rear wheel drive case 5. The rear wheels 3 are driven. On the other hand, the power transmission shaft 9 is inserted through the inside of the body frame 1 (FIGS. 3 and 4), and a front case 7 is provided at the front part of the body frame 1, and can be rotated right and left around the vertical direction below the front case 7. , A front wheel drive case 8 is mounted on the front wheel drive case 8 so that the front wheel drive case 8 can support and drive one front wheel 2 to constitute a three-wheel drive vehicle. The engine 73 is covered by the bonnet 10, and a transmission case 74 and a rear wheel 3 are provided in front of the bonnet 10.
A body cover 11 for covering the vehicle body is provided.
A driver's seat 12 is mounted on the upper side, and a steering column 13 is erected on the body frame 1 in front of the driver's seat 12.
A steering handle 14 projects above the steering column 13, an accelerator lever 15 projects from the right side of the steering column 13, and a key switch 16 is arranged on the left side.

A work machine 75 is suspended from the abdomen of the riding type management work vehicle 71 between the front wheel 2 and the rear wheel 3 by a work machine mounting device 76 of the present invention described later.
The hitch 21 of the work machine 75 is attached to the other end of the work machine mounting device 76.
Is pivotally supported, and a bar-shaped toolbar 23 is extended to the hitch 21 in the left-right direction, and a central portion is fixedly provided. A plurality of work machines 75 are attached to the center and the left and right sides of the toolbar 23 so that the mounting positions can be changed, so that a plurality of management operations can be performed. The right working machine 75 shown in FIG.
In the figure, the mounting position is mounted on the center side in the left-right direction, and the left working machine 75 is mounted on the outer side in the left-right direction. As the working machine 75, a rotary tiller, a rake-shaped rake for removing weeds, and the like can be arranged.

Next, the body frame 1 will be described with reference to FIG.
This will be described with reference to FIG. The body frame 1 is formed in a tubular shape that is long in the front-rear direction, and is formed in a stepped shape on the front frame 101 and the rear frame 102 at a substantially central position in the front-rear direction where the steering column 13 is erected. Engine frame 103 at the rear end
・ 103 is fixed.

The engine frames 103, 103
Two engine frames 103 are fixed to the left and right of the upper rear end of the rear frame 102, and the engine 7
The vehicle body cover 11 is mounted on the front of the engine frames 103, 103, and the transmission case 74 and the rear wheel 3 are mounted thereon. Also, as shown in FIG.
The driver's seat 12 placed on the vehicle body cover 11 includes a rear wheel 3
The parking lever 39 is provided on the side of the driver's seat 12. When the operator gets on the driver's seat 12, weight is applied to the axle 6, so that the weight balance of the entire body is not broken.

The rear frame 102 is formed in a U-shape whose lower part is open in a front sectional view, and the rear end of the rear frame 102 extends to a position immediately before the transmission case 74. In the rear frame 102, a first power transmission shaft 91 protruding forward from an upper portion of the transmission case 74 is disposed in a front-rear direction at an upper portion in the rear frame 102, and a PTO shaft protruding from a lower portion of the transmission case 74. The universal joint 37 is connected to 35. The universal joint 3
7 When the front part is turned upward, it is turned into the open surface of the rear frame 102 formed in a “U” shape, and even if the work equipment 75 is raised high by the work equipment mounting device 76,
There is no interference between the universal joint 37 and the rear frame 102.

Further, steps 40 are formed on the left and right sides of the lower portion of the rear frame 102.
The pipe body is provided with a bent frame body 41 at the outer periphery thereof to reinforce the pipe body so that the user can get on and off from the front side of the step 40.

A connecting frame 105 is fixed on the front upper portion of the rear frame 102, a rear portion of the front frame 101 is fixed on the upper portion of the connecting frame 105, and a steering column 13 stands on the rear portion of the front frame 101. And the front frame 10 from the lower part of the steering column 13
1 is extended forward, and the front frame 101 is arranged one step higher than the rear frame 102. And, since the work machine mounting device 76 for suspending the above-described work machine 75 is disposed at the front of the front frame 101, the work machine mounting device 76 can be arranged at a position higher than the step 40 surface,
In addition, at the position where the work machine 75 is raised, the work machine 7
The hitch 21 of No. 5 can also be held higher than the arrangement surface of the step 40, and the working machine 75 can be raised high.

Further, inside the front frame 101,
As shown in FIG. 4, the second power transmission shaft 92 and the steering rotation shaft 43
Is supported. The rear portion of the steering rotation shaft 43 is connected to a lower portion of an operation shaft 45 via a joint shaft 46. The operation shaft 45 is supported vertically in the steering column 13 and is interlocked with the steering handle 14. Have been.

Next, the work machine mounting device 76 will be described. As shown in FIGS. 6, 7 and 8, a pair of left and right lifting cylinders 22 project downward from the front side of the body frame 1 (rear position of the front case 7). The shaft 51 of the mounting part 33 is fixed to the lower part of the piston rod 34. The mounting part 3
Reference numeral 3 denotes a substantially “U” -shaped side view, and an upper mounting arm 61 having a hook for suspending a work machine 75 is provided at a rear end from an upper portion of the support 50 so as to protrude therefrom. A lower mounting arm 62 provided with a hole for inserting a locking pin protrudes therefrom. The shaft 5 between the left and right mounting portions 33
1 and 51 are fixed vertically in parallel to increase the rigidity of the mounting portion 33. The piston rod 34 is attached to the upper shaft 51.
34 is fitted and fixed. As the lifting cylinder 22 expands and contracts, the mounting portion 33 vertically moves up and down.
Further, since the mounting portion 33 is fixed to the piston rod 34, the mounting portion 33 does not tilt due to the weight of the working machine 75, and the rigidity of the mounting portion 33 is increased by the shafts 51. The work machine 75 can be moved up and down stably in the direction.

The mounting portion 33 is formed by integrating the support body 50 with an upper mounting arm 61 and a lower mounting arm 62. At the rear end of the upper mounting arm 61, a hook portion for mounting a working machine 75 is formed. The hook of the upper mounting arm 61 is hooked on a pin 166 provided on the hitch 21 of the work machine 75, and the mounting portion 33 is moved up and down. The collar 165 is fixedly provided, and the collar 165 is introduced into the lower connecting portion 212 of the hitch 21 so that the working machine 75 can be connected.

The hitch 21 is provided with upper mounting arms 61.6.
1 is composed of an upper connecting portion 211, 211 connected to the rear end and lower connecting portions 212, 212 connected to the lower mounting arms 62, 62. The lower connecting portion 212 and the upper connecting portion 211 extend in the left-right direction. A rectangular toolbar 23 with a rectangular section
It is fixed to. As shown in FIGS. 7 and 8, the upper connecting portions 211 are fixed to the upper surface of the toolbar 23. The upper connecting portion 211 and the lower connecting portion 212 are formed in a “U” shape in plan view, and have open surfaces facing forward. A locking pin 166 is provided horizontally above the upper connecting portion 211. The lower connecting portions 212 are fixedly provided on the lower surface of the toolbar 23 directly below the upper connecting portions 211. A guide plate 167 is provided below the lower connecting portion 212.
A 167 is provided, and the collar 165 fixed to the lower mounting arm 62 can be locked. A hole is provided so as to match the hole of the locked collar 165, and the lower connecting portion 212 is connected to the lower mounting arm 62 by inserting the locking pin 168 into the hole.

A work implement 75 is mounted via a mounting section 28 at the center of the toolbar 23 in the left-right direction and at the left-right side. The mounting portion 28 for mounting the work machine 75 at the left and right positions forms a cylindrical portion, and the tool bar 2 is attached to the cylindrical portion.
3 is inserted. The working unit 75 is
Is supported. The mounting portions 28 on the left and right sides can slide left and right on the toolbar 23, and can be fixed by tightening bolts at arbitrary positions.

Next, as a working machine 75 supported by the mounting portion 28, a rotary tiller in this embodiment is supported. As shown in FIG. 5, the rotary cultivator includes a mounting part 28 that is fitted to the toolbar 23, a rotary chain case 25 fixed to the mounting part 28, and a tilling shaft that is supported by a lower portion of the rotary chain case 25. An implanted tilling claw 26 and a cover 27 for covering the tilling claw 26
The beam 29 projects from the middle of the rotary chain case 25 to the rear, and a cultivation plate 31 for ridge-raising with the gauge wheel 30 is fixedly provided.

The power shaft 38 includes a shaft 381 formed by a spline shaft or a polygon shaft,
1 is slidably fitted therein, and as shown in FIG. 3, the power shaft 38 is connected to the case where the distance between the left working machine 75 and the central working machine 75 is changed. It expands and contracts so that power can be transmitted.

Also, a plurality of working machines 7 arranged in the left-right direction
The power 5 is transmitted from the transmission case 74 via the universal joint 37. That is, a power input case 36 is fixedly provided substantially at the center of the toolbar 23 in the left-right direction. On the other hand, as shown in FIG. 3, a PTO shaft 35 protrudes forward from a lower portion of the transmission case 74, and a universal joint shaft 37 is interposed between the PTO shaft 35 and the input shaft of the power input case 36, so that the power Is transmitted. The power shaft 3 is located on the side of the power input case 36.
The power shaft 38 is inserted into the upper part of the rotary chain case 25, and power is transmitted to each rotary cultivator. The universal joint 37
A transmission shaft 371 formed by a spline shaft or a polygonal shaft, and a fitting cylinder 372 into which the transmission shaft is slidably fitted.
The universal joint 37 expands and contracts and power is transmitted to the work implement 75 even when the distance between the transmission case 74 and the work implement 75 changes when the work implement mounting device 76 moves up and down. .

As shown in FIG. 9, caster attachment and removal frames 130
The work machine can be attached and detached by mounting 130. The caster attachment / detachment frame 130 is a side view portal type frame 13.
1, the lower end of the frame 131 has wheels 132.1
32 are arranged. The wheels 132 have caster wheels rotatable about a vertical direction. In addition, in the front and rear substantially central portions on the gate-shaped frame 131,
A square pipe 133 according to the cross-sectional shape of the toolbar 23 is fixed, and the square pipe 133 projects inward in the left-right direction. The bottom surface of the square pipe 133 is the frame 13
The hitch 21 is fixed at a predetermined angle with respect to the upper surface (horizontal direction) so that the hitch 21 is tilted forward.

When the work machine 75 is removed, the square pipes 133 are inserted into both ends of the tool bar 23 and fixed, and then the work machine 75 is lowered, so that the wheels 132 of the caster attachment frame 130 are removed. At this time, since the square pipe 133 is tilted at a predetermined angle, the working machine 75 is held in a state where the rear part which has been tilted forward is lifted, and the work machine mounting fixture 33 is lowered to move the upper mounting arm. Remove 61 and the lower mounting arm 62.

When the work machine 75 is mounted, the work machine fixture 33 is lowered, the detachable frame 130 with casters is moved, and the hook at the tip of the upper mounting arm 61 is attached to the hitch 21.
After the locking pin 168 of the lower connecting part 212 is removed and positioned immediately below the locking pin 166 inserted and fixed to the upper connecting part 211, 33, the locking pin 166
Is locked to the hook portion, and the upper mounting arm 61 and the upper connecting portion 2
11 are connected, and the front part of the work machine 75 that is tilted forward is lifted. At the same time that the hitch 21 of the work machine 75 is turned vertically upward, the lower mounting arm 62 is inserted into the lower connecting portion 212, and the collar 165 can be accurately positioned without manually guiding the lower mounting arm 62 into the lower connecting portion 212. Guide plate 1
67 and 167, and can be connected using a locking pin 168. Then, the work implement fixture 33 is further raised, and if the front wheel 132 of the caster attaching / detaching frame 130 rises, the square pipe 1
33 can be easily removed from the toolbar 23.

As described above, when the detachable frames 130 with casters are attached to both ends of the toolbar 23, the hitch 21 is maintained in a state where the hitch 21 can be easily attached to the work machine mounting device 76, and the work machine mounting device 76 is moved up and down. It can be easily mounted with only. The hitch 21 connected to the work machine mounting device 76 is tilted forward, and the toolbar 23 is fixed at a fixed angle. However, the square pipe 133 is formed in a polygonal shape, and It is also possible to adopt a configuration in which a cylindrical body into which a polygonal square pipe is fitted is fixed.

A second embodiment of the vertical lifting device will be described.
As shown in FIGS. 10, 11, and 12, brackets 18 protrude from the lower portion of the frame 1, and an elevating cylinder 22 is disposed downward from inside the frame 1. In the front frame 101, the lift cylinder 22
Is disposed at a position not in contact with the steering rotation shaft 45 and the power transmission shaft 92. A shaft 89 is laid horizontally on the end of the piston rod 34 of the lifting / lowering cylinder 22 in the left-right direction, and is rotatably supported. Sprockets 81 are fitted and fixed to both ends of the shaft 89. Have been. A chain 82 having one end fixed to the bracket 18 is wound around the sprocket 81, and the other end of the chain 81 is fixed to a lower part of the work implement fixture 83.

At the rear end of the upper mounting arm 87 at the rear end of the work equipment mounting member 83, a hook is formed to mount a working machine. A cylindrical collar 165 having a core is fixed. In addition, the two right and left work implement attachments 83
A roller 85 is fitted to and fixed to the left and right ends of the shaft 84 so as to be rotatably supported. A guide rail 86 is provided in the bracket 18 in a vertical direction, and the roller 85 is fitted therein.
Along the guide rail 86, it is configured to be vertically movable. Therefore, the chain 82 is pulled upward via the sprocket 81 by contracting the elevating cylinder 22. One end of the chain 82 is a bracket 18
, The work implement fixture 8 fixed at the other end
3 rises. Conversely, when the elevating cylinder 22 is extended, one end of the chain 82 moves downward due to the weight of the work implement attachment 83 fixed to one end of the chain 82, and the work implement attachment 83 descends. In order to take such a configuration, by extending and retracting the elevating cylinder 22, the work implement fixture 83 can move up and down a distance twice as long as the elevating cylinder 22 is moved up and down, and the stroke of the elevating cylinder 22 is reduced. Even if it is short, the lifting distance of the working machine can be lengthened. However, it is also possible to use a wire instead of a chain and a pulley instead of a sprocket.

As shown in FIG. 11, the work implement attachment 83 has a substantially "U" shape when viewed from the side. The upper end is the attachment arm 87, and the lower end is the attachment arm 88. The attachment arm 88 is located immediately below the attachment arm 87, and the work implement attachment 83 has a substantially "C" shape in plan view as shown in FIG. The rear end of the mounting arm 87 is formed in a hook shape for suspending the working machine 75, and the rear end of the mounting arm 88 has a lateral axis for locking the working machine 75. A cylindrical collar 165 is inserted and fixed. The hook portion at the rear end of the mounting arm 87 is inserted into the upper connection portion 211 of the hitch 21 of the work machine 75, and is positioned immediately below the locking pin 166 inserted and fixed to the upper connection portion 211, and the lifting cylinder 22, the work implement fixture 83 is raised, and the upper connecting portion 21 is raised.
The first locking pin 166 is suspended, and the collar 165 fixed to the mounting arm 88 can be inserted into the lower connecting part 212 without manually introducing the locking pin 166, and the locking plate 167 provided on the lower connecting part 212 can be inserted. The collar 165 is engaged with the lower connecting portion 212 by 167, and a hole is opened at the engagement position by the locking plate 167, and the fixing pin 168 is inserted.

Further, it is possible to change the wheel base of the riding management work vehicle 71 in accordance with the front and rear width of the work machine. As shown in FIGS. 13 and 14, the frame 1 is divided into a slide frame 104 and a front frame 101, and the slide frame 104 is divided into the front frame 101 and the front frame 101.
The front frame 101 is configured to be one size larger and can be inserted. Further, the slide frame 104 and the front frame 101 are formed in a substantially rectangular pipe shape in cross section, and the front frame 101 is inserted into the slide frame 104 so that the slide frame 104 can be slid in the front-rear direction. Have been. Therefore, the wheel base width of the riding management machine 71 is made variable. The slide frame 104 has a hole 96 for inserting a bolt 94 for fixing the front frame 101, and the front frame 101 has a grooved hole for screwing the bolt 94. 95 are provided. After the width of the wheel base is adjusted, the holes 96 and the holes 95 are made to coincide with each other, and the front frame 101 and the slide frame 104 are fixed by screwing the bolts 94 into the holes 95 through the holes 96. In the above configuration, the elevating cylinder 22 is disposed in the bracket 18, and is disposed at a position that does not hinder the slide mechanism of the slide frame 104.

The structure for making the wheel base variable is not limited to the above, and a pinion gear 111 is provided inside the upper surface of the slide frame 104 and a rack 112 is provided on the upper surface of the front frame 101 as shown in FIG. The wheel base width can be variably configured by fixing the rack 112 so that the groove surface of the rack 112 matches the teeth of the pinion gear 111, and rotating a motor (not shown) connected to the pinion gear 111. . FIG.
As shown in FIG. 6, a hydraulic cylinder 123 is fixed on the upper surface of the slide frame 104, and a locking portion 124 is fixed on the upper surface of the front frame 101, and the shaft of the cylinder 123 is connected to the locking portion 124. By doing so, the slide frame 104 can be slid with respect to the front frame 101 as the hydraulic cylinder 123 expands and contracts, and the wheel base width can be changed.

In the above configuration, since the wheel base width is variable, the power transmission shaft 91 and the operation shaft 45 are connected to the spline cylinder 1 inside the frame 101 as shown in FIG.
21 and the spline cylinder 122 so as to be able to cope with changes in the wheel base width. The power transmission shaft 91 includes a shaft 191 formed by a spline shaft or a polygonal shaft, and a spline cylinder 121 into which the shaft 191 is slidably fitted. The front operation shaft 45 is formed by a spline shaft or a polygonal shaft. Shaft 14
5 and a spline cylinder 122 into which the shaft 145 is slidably fitted. The power transmission shaft 91 and the operation shaft 45 can be expanded and contracted to cope with the case where the wheel base width is changed to enable power transmission and operation. I have to. Further, in order to smoothly slide the slide frame 104 and the front frame 101, rollers may be provided on the slide frame 104 and the front frame 101.

[0031]

The following effects can be obtained by the above configuration. First, since the work machine mounting device is configured as described in claim 1, the work machine can be mounted in a minimum necessary space, and a margin in the front-rear direction can be reduced, and the riding management work machine can be made compact. Configurable. Further, an extra space is not required at the time of mounting / detaching the work equipment, and the space near the work equipment mounting apparatus can be effectively used in a passenger management vehicle having a limited width for mounting the work equipment. Therefore, the range of choice of the working machine to be mounted is increased. Since the work equipment mounting device moves up and down vertically, it is easy to predict the operation of the work equipment mounting equipment when attaching and detaching the work equipment, and it is easy to determine the arrangement when mounting the work equipment, so it is easy to attach and detach the work equipment It is possible.

Further, in the case of the configuration according to claim 2,
The configuration of the work machine attaching / detaching device is simplified. For this reason, complicated inspection and maintenance of each member are reduced, and inspection and maintenance can be easily performed, so that the risk of failure due to poor maintenance is reduced. In addition, since the number of components constituting the work machine mounting device is small, the number of movable parts of the work machine mounting device is small, so that occurrence of a failure can be suppressed.

According to the third aspect of the present invention, the amount of elevating and lowering the work implement fixture is twice as large as the amount of expansion and contraction of the elevating cylinder, so that the mounting space for the elevating cylinder can be made compact. For this reason, the hydraulic device can be accommodated in a small space, and the degree of freedom in design can be increased. It can be installed at a relatively strong part of the fulcrum frame at the bottom of the lifting cylinder.
In addition, since the work implement attachment is raised and lowered by the guide rail, it is possible to increase the rigidity of the work implement mounting device in the front-rear direction. For this reason, it is possible to improve the durability of the work implement mounting device.

[Brief description of the drawings]

FIG. 1 is an overall side view of a riding management work vehicle with a work machine mounted on an abdomen.

FIG. 2 is an overall plan view of the riding management work vehicle.

FIG. 3 is a partial side cross-sectional view showing a body frame provided with a power transmission configuration.

FIG. 4 is a partial side view showing a body frame provided with a power transmission configuration.

FIG. 5 is a plan view showing a front part of the riding management work machine.

FIG. 6 is a partial rear view showing the configuration of the work implement fixture.

FIG. 7 is a partial plan view and a partial cross-sectional view showing a configuration of a work implement attachment.

FIG. 8 is a partial side view showing the configuration of the work implement mounting device.

FIG. 9 is a side view showing a state in which the working machine is mounted using the caster attachment / release frame.

FIG. 10 is an overall side view of a riding management work vehicle showing a second embodiment of the present invention.

FIG. 11 is a partial side view and a partial cross-sectional view illustrating a configuration of a work machine mounting device.

FIG. 12 is a partial plan view and a partial cross-sectional view illustrating a configuration of a work implement mounting device.

FIG. 13 is an overall side view of a riding management work vehicle showing an embodiment in which a wheel base is made variable.

FIG. 14 is a partial side sectional view showing a body frame provided with a power transmission configuration.

FIG. 15 is a partial side sectional view of the body frame.

FIG. 16 is a partial side view of the body frame.

[Explanation of symbols]

 22 Elevating Cylinder 33 Work Machine Fixture 51 Arm 75 Work Machine 76 Work Machine Mounting Device 81 Sprocket 82 Chain

Claims (3)

[Claims] 1. A work machine mounting device which allows a work machine to be mounted on an abdomen between a front wheel provided at a front portion of a body frame and a rear wheel provided at a rear portion thereof so as to be able to move up and down. A work machine mounting device for a passenger management work vehicle, wherein a portion is provided in a vertical direction, and a mounting portion of the lifting device is configured to be vertically movable. 2. The work machine mounting device for a riding management work vehicle according to claim 1, wherein the lifting drive unit is a hydraulic cylinder. 3. In the elevating drive unit, one end of a chain is fixed to a body frame, the other end is fixed to a mounting part, and an intermediate part of the chain is wound around a sprocket pivotally supported by a tip of a piston rod of a hydraulic cylinder. The work machine mounting device for a passenger management work vehicle according to claim 1, wherein the work machine mounting device is turned.