JP4182793B2 - Farm work vehicle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In particular, the present invention relates to a configuration of an agricultural work vehicle that operates along crops and straws planted in rows.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, like a riding-type tillage tractor disclosed in Japanese Patent Application Laid-Open No. 2001-95315, a work vehicle that includes left and right front wheels and left and right rear wheels, and a work machine that can be raised and lowered at the lower abdomen of the vehicle body between the front and rear wheels. It has been known.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-95315
[Problems to be solved by the invention]
In the tractor as described in the above publication, a ground work machine is provided in the lower abdomen of the vehicle body in order to improve the weight balance between the front and rear of the vehicle. Therefore, a large space is required at the location, and the vehicle's step floor, that is, the height of the vehicle becomes high, and work cannot be performed in a work space with a small overhead space such as a plastic house or a mountainous area. problem of bad operability is rather Yogina the cramped attitude is there.
[0005]
[0006]
[Means for Solving the Problems]
In view of the above-described problems, the present invention has taken the following technical means for the agricultural vehicle of the present invention.
That is, according to the first aspect of the present invention, the vehicle body frame (2) is disposed below the cockpit (1) in the longitudinal direction of the vehicle body, and the lifting device (3) is provided on both left and right sides of the vehicle body frame (2). Agricultural work vehicle equipped with a ground work machine (R) configured to be movable up and down by driving,
A step floor (4) having bulges (4a) formed on both left and right sides is provided above the vehicle body frame (2), and the ground work machine (R) is lifted below the bulges (4a). A farm vehicle characterized in that the movable part (3b) of the device (3) can be stored.
(Operation of claim 1)
In the invention of claim 1 configured as described above, when the ground work machine (R) is raised, the movable portion (3b) of the lifting device (3) enters the bulging portion (4a) of the step floor (4). .
[0007]
[0008]
[0009]
【The invention's effect】
In claim 1 configured as described above, since the movable portion (3a) of the lifting device (3) is stored below the bulging portion (4a) of the step floor (4), the ground working machine (R ) Can be raised as high as possible without disturbing the operator's feet on the left and right sides of the step floor (4). Therefore, the height of the farm vehicle can be reduced, and the work or traveling can be performed even in such a narrow work place. Moreover, the possibility of contact with the unevenness of the ground surface can be reduced. Therefore, the operability of the farm vehicle is improved.
[0010]
[0011]
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 to 4, the farm vehicle 10 has a horizontal front frame 2 a, 2 a that is arranged along the front-rear direction at the front of the vehicle body, and an engine E is mounted between the left and right front frames 2 a, 2 a. The frame 2b is bridged, and the rear end of the front frame 2a is connected to the rear frame 2d in the front-rear direction via the intermediate frame 2c in the vertical direction, and is further used for attaching a cockpit between the rear frames 2d and 2d. The auxiliary frame 2e is bridged, and the left and right rear ends of the rear frames 2d, 2d are connected to each other by the rear frame 2f to constitute the vehicle body frame 2.
[0013]
Further, the left and right front ends of the front frame 2a are connected to each other by a battery mounting plate 17 having an L-shape in a side view, and the battery B is placed and fixed on an intermediate portion of the plate 17 and from the front side surface of the frame 2a. The pressing handle 11 having a loop shape in plan view is attached.
[0014]
Further, on both the left and right sides of the pressing handle 11, steering clutch clutch levers 13 and 13 for individually turning on and off the steering clutches of the left and right front wheels 12F and 12F, which will be described later, and the steering clutch are both turned off. The loop-like vehicle stop clutch lever 14 is provided.
[0015]
Thus, the operator can lift the rear portion of the vehicle body with the front wheel 12F as a fulcrum by pressing the pressing handle 11 downward, and the front wheel 12F and the caster wheel 15 (auxiliary wheel) attached to the front thereof. Can be easily changed in a place where overhead space is narrow, such as in a greenhouse.
[0016]
Further, the engine E is provided with a muffler 20 on a side surface and exhausts an exhaust pipe 20a of the muffler 20 forward and downward, and in a front view (see FIG. 4) to substantially the same position as the front wheel 12F. ing.
As a result, exhaust (hot air) is not blown against the crop on the ridge, there is no fear of damaging or contaminating the crop, and the exhaust is not directly blown to the operator who operates the pressing handle 11. It is designed as follows.
[0017]
A handle post 21 is provided at the rear of the engine E. A steering handle 22 is provided at the top of the handle post 21, and an engine throttle lever 23 and a transmission lever 24 project from the back of the post 21. It is the composition to do.
[0018]
In addition, the rotation base of the steering handle 21 is connected to a wire that transmits and pushes the rotation of the steering shaft, and the wire is connected to the steering clutch of the front wheel 12F to be turned on and off individually. It has become.
Thus, when the steering handle 21 is turned to the left, the steering clutch for the left front wheel 12F is turned off, the vehicle is steered to the left with the left front wheel 12F as a fulcrum, and the steering wheel 21 is turned to the right to turn the right front wheel 12F. The steering clutch on the side is turned off, and the vehicle can be steered to the right with the right front wheel 12F as a fulcrum.
[0019]
Further, behind the engine E, a working machine lifting device 3 that is lifted and lowered by driving an actuator (hereinafter referred to as an electric cylinder 25) attached to the front frame 2a, and the working machine lifting device 3 above the rear frame 2d. It is the structure provided with the step floor 4 which covers a part upper part.
[0020]
As shown in FIG. 3, the working machine lifting / lowering device 3 includes a first rotary case 3 a having a clutch mechanism for turning on and off the rotational power of the engine E, and a tool bar 26 projecting from the lower portion of the case 3 a. The second rotary cases 3b and 3b, the position of which is adjustable, and the third rotary case 3c attached to the outside of the lower end portion of the case 3b are provided.
[0021]
The second rotary case 3b is connected to the piston portion 25a of the electric cylinder 25 attached to the front frame 2a at the upper part thereof so as to be rotatable about the tool bar 26, and the third rotary case 3c. In this configuration, a link arm 27 rotatably supported by the rear frame 2d is connected to the upper portion.
[0022]
Accordingly, the parallel link mechanism 5 is configured by the electric cylinder 25, the second rotary case 3b, the third rotary case 3c, and the link arm 27, and the piston 25a of the electric cylinder 25 is shortened to shorten the second. The rotary case 3b is rotated upward about the tool bar 26, and at the same time, the third rotary case 3c is rotated upward about the connecting shaft 28 with the second rotary case 3b. Can rise. Conversely, by extending the piston 25a of the electric cylinder 25, the second rotary case 3b is rotated downward about the tool bar 26, and at the same time, the third rotary case 3c is moved to the second rotary case 3b. And the work implement R can be lowered.
[0023]
In the state where the second rotary case 3b is rotated upward, the case 3b is inclined substantially horizontally, and the lower end portion is at the same height as the lower surface of the rear frame 2d. The upper portion is a position that partially overlaps the vertical width of the rear frame 2d in a side view and partially overlaps the horizontal portion 4c of the floor in a front view.
[0024]
On the other hand, the step floor 4 is formed by bending a metal plate, the lower surface portion is attached to the upper part of the left and right rear frames 2d, and the rear end portion of the step floor 4 is attached to the support frame 29 of the cockpit 1. The structure extends to the position.
Further, as shown in FIG. 5, bulging portions 4a and 4a that bulge upward are formed on the left and right sides of the front portion of the step floor 4, and more specifically, the left and right sides are directed upward from the outer side of the rear frame 2d. It is configured to rise and be formed, and the side portion is formed in parallel with the center portion of the floor. Further, as shown in the side view of FIG. 1, the front side of the left and right bulging portions 4a is open toward the front, and the rear side forms a wall portion 4b and continues to the rear and front center horizontal portions 4c. It has become.
[0025]
Further, as shown in FIG. 6, a central bulging portion 4d is also formed in the rear center portion of the step floor 4 as described above, and the steering handle 22 and the left and right rear wheels 12R, 12 are connected to the lower portion thereof. These wires 30 and 30 are routed, and the rear wheel 23R is steered left and right by the rotation of the steering handle 2.
[0026]
When the working machine lifting / lowering device 3 of the agricultural work vehicle 10 configured as described above drives the electric cylinder 25 and raises the ground working machine R, as shown in the two-dot chain line state of FIG. 1 or FIG. The rear part of the second rotary case 3 b enters the bulging part 4 a of the step floor 4. Further, a part of the working machine R is located below the floor,
As a result, the working machine R can be raised as high as possible below the step floor 4, the vehicle height can be set as low as possible, and the work machine R can be operated or run even in a work space with a small overhead space. In addition, since the working machine can be raised higher, the working machine R can be used for the unevenness of the ground surface and obstacles especially when the push handle 11 is operated and the rear part of the vehicle body is lifted. The risk of touching is reduced.
[0027]
Further, the ground working machine R provided at the lower part of the third rotary case 3c moves up and down in parallel, so that, for example, as shown in FIG. Even in this case, the approach angle into the ground does not change and the load can be stabilized and work can be performed.
[0028]
Furthermore, the structure of the working machine lifting / lowering device 3 will be described.
In the vicinity of the rotation axis of the link arm 27, a bracket 32 having a "h" shape in side view is supported on the rear frame 2d, and a lock nut 33, 33 is provided on each of the front and rear inclined surfaces. Adjustable bolt type stoppers 34, 34 are provided, and the vertical rotation position of the link arm 27, that is, the ascending position and the descending position of the work machine R are regulated to be adjustable.
[0029]
Thereby, according to the kind of ground work machine R, raising height can be changed or working height at the time of work, such as tilling depth, can be changed.
Next, based on FIG. 7, the cultivating machine R provided at the lower part of the third rotary case 3c will be described.
[0030]
The cultivating machine R is for weeding field weeds and weeds growing between crops, and a plurality of rotary claws 41 attached to a tilling shaft 7 (drive shaft) below the case 3c, and these rotary claws 41. A rotary cover 6 that covers the upper and rear sides of the cover 6, and a cultivating plate 43 that is detachably attached to the upper portion of the cover 6 and that extends the arm 42 and is arranged behind the rotary claw 41.
[0031]
The rotary cover 6 is fixed to the side surface of the third rotary case 3c, and the upper surface is formed on the horizontal portion 6a.
Thereby, the rotary cover 6 is kept parallel to the step floor 4 by the parallel link mechanism 5 regardless of whether the work implement elevating device 3 is driven up and down or the work implement R is grounded or raised. The horizontal portion 6a can be used as a step for getting on and off the farm vehicle 10 at all times.
[0032]
Further, as shown in FIG. 8, the cultivating machine R connects the left and right tillage shafts 7, 7 with a connecting shaft 8, and the left and right rotary covers 6, 6 are also connected with a connecting cover 9. The structure can be improved to the machine.
More specifically, the connecting shaft 8 is constituted by a hollow pipe, and after sliding one of the left and right sides of the cult working machine R on the tool bar 26 to the side, the inner side of the other cult working machine R is One end of the connecting shaft 8 is fitted and connected to the tilling shaft 7, and the cultivating machine R on the removed side is attached to the tool bar 26 again to engage the other end of the connecting shaft 8. Fix it.
[0033]
After that, the connecting cover 9 is attached between the left and right rotary covers 6 and 6 with bolts or the like.
As a result, a rotary work machine corresponding to the width of the vehicle body can be configured by additionally attaching parts using the cultivating work machine R divided into the left and right sides, reducing the improvement cost and improving the versatility of the work. Can be spread.
[0034]
Next, the caster wheel 15 positioned in front of the front wheel 12F will be described with reference to FIGS. The caster wheel 15 is provided with the support bracket 45 inside the front wheel support case 46, and the bracket 45 is provided with an inclined cylinder 47 directed forward, and an inclined shaft 48 that supports the caster wheel 15 is provided on the cylinder 47. It is configured to be rotatable about the same axis. The caster wheel 15 is configured such that the height is set at a substantially central position of the front wheel 12F and the left and right position is set within the left and right width h of the front wheel 12F.
[0035]
As a result, when the pressing handle 11 is pressed downward, the inclined shaft 48 is positioned in the vertical direction, and the vehicle can be steered left and right while the caster wheel 15 is grounded to the ground surface with good followability. The operability of the vehicle is improved.
In addition, since the caster wheel 15 is integrally attached to the front wheel support case 46, there is no need to separately adjust the left and right positions when changing the tread of the front wheel 12F.
[Brief description of the drawings]
FIG. 1 is an enlarged side view of a work machine lifting device.
FIG. 2 is an overall side view of an agricultural work vehicle.
FIG. 3 is a plan view of an agricultural work vehicle.
FIG. 4 is a front view of an agricultural work vehicle.
FIG. 5 is a front sectional view of the front part of the floor.
FIG. 6 is a front sectional view of the rear part of the floor.
FIG. 7 is a front view of the cultivating machine.
FIG. 8 is a rotary work machine. FIG. 9A is a plan view of the caster wheel mounted from the oblique rear side.
(B) The top view which looked at the state at the time of rotation of a caster wheel from diagonally backward.
[Explanation of symbols]
E engine R ground working machine 1 cockpit 2 body frame 2d rear frame 3 work equipment lifting device 3a movable part 4 step floor 4a left and right bulging part of step floor 5 parallel link mechanism 6 boarding step shared cover 7 tillage shaft (drive shaft)
8 Connecting shaft 10 Agricultural work vehicle 25 Electric cylinder

Claims (1)

A vehicle body frame (2) is disposed below the cockpit (1) in the longitudinal direction of the vehicle body, and the vehicle body frame (2) is configured so that it can be moved up and down by driving the lifting device (3) on both right and left sides. In farm work vehicles equipped with work machines (R),
Provided above the body frame (2) is a step floor (4) formed with bulging portions (4a) that bulge upward on both left and right sides, and a ground work machine below the bulging portion (4a). A farm vehicle characterized in that the movable part (3b) of the lifting device (3) of (R) can be stored.

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