JP4746465B2 - Agricultural work cart - Google Patents

Description

  The present invention relates to a technique for an agricultural work cart that transmits a driving force from a motor to drive the cart.

2. Description of the Related Art Conventionally, a technique for an agricultural work cart that includes a motor as a moving drive source and that allows an operator or the like to plant a vegetable seedling while sitting on a seat is known. By driving the motor, the agricultural work cart can be moved in a sitting state along the ridges, thereby facilitating planting of vegetable seedlings.
Conventional agricultural work carts are provided with a clutch for disconnecting the connection between the power from the motor and the wheels when no power is required.
JP 2006-55063 A

However, since the clutch for freely rotating the left and right wheels was not provided, the vehicle body had to be lifted and moved when moving to the next kite after working to the end of the kite.
Therefore, in view of such a problem, the present invention provides an agricultural work cart that can smoothly turn without lifting the vehicle body by independently rotating the left and right wheels.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, according to the first aspect of the present invention, the front and rear wheels are disposed on the vehicle body frame, the power from the motor, which is the driving source for movement, is transmitted to the rear wheel to drive the carriage, and the electric power is supplied to the motor. Agricultural work cart in which a battery is placed behind the vehicle body and fixed with a battery retainer, and a work table is provided in front of the vehicle body frame, between the motor and the transmission shaft, and between the transmission shaft and the wheel. Each is provided with a clutch and connected to the operating means, and the clutch can be turned on and off simultaneously by operating the operating means.

  In the present invention, the work table is configured to be movable in the longitudinal direction of the machine body.

  According to a third aspect of the present invention, a battery retainer is disposed on the upper surface of the battery, holes for inserting bolts are opened on both sides of the battery retainer, and a bolt head or a nut can be passed to one side of the bolt hole. Is provided with a passable part.

  As effects of the present invention, the following effects can be obtained.

  In claim 1, when the clutch lever is disconnected, not only the mechanical connection between the motor and the transmission shaft is disconnected, but also the left and right rear wheels 4 can rotate independently. Can be easily performed.

  According to the second aspect, the distance from the work table to the seat can be freely adjusted, and the work can be performed with an appropriate arrangement in accordance with the work.

  According to the third aspect, when the battery is frequently removed for charging the battery or the like, it can be removed without performing a troublesome work, and the burden is reduced.

Next, embodiments of the invention will be described.
FIG. 1 is a side view showing the overall configuration of an agricultural work cart according to an embodiment of the present invention, FIG. 2 is a plan view of the agricultural work cart, and FIG. 3 is a bottom view of the agricultural work cart. 4 is a side view showing the agricultural work cart during storage, FIG. 5 is a partial cross-sectional view of the rear surface of the clutch mechanism, FIG. 6 is a side view showing the drive mechanism of the rear wheel, FIG. 7 is a side view of the vicinity of the seat, 8 is a front view of the seat, FIG. 9 is a plan view of the right front wheel and the footrest, FIG. 10 is a rear view of the left front wheel and the footrest, and FIGS. 11 to 14 show examples of bolt holes of the battery retainer. It is a perspective view.

First, the schematic configuration of the agricultural work cart of the present invention will be described with reference to FIGS. 1 to 3. The direction of arrow A in FIG. 1 will be described below as the front portion of the agricultural work cart 1.
The agricultural work cart 1 includes a body frame 2, front wheels 3L and 3R, rear wheels 4L and 4R, a seat 5, and the like. The rear wheels 4L and 4R are driven by a motor 2 (see FIG. 3) to move forward and backward. Is possible.
The body frame 2 has a pipe-like or rod-like member framed in a substantially quadrangular shape in plan view, and a work table for placing vegetable seedlings, crops, etc. on the front left and right substantially center of the body frame 2. 6 is provided. The work table 6 is fixed to the center portion of the front frame 10 installed in the vehicle body width direction at the foremost portion of the vehicle body frame 2 with bolts or the like. A long hole 6a is formed in the work table 6 in the front-rear direction. When the work table 6 is fixed to the front frame 10 with a bolt or the like, the work table 6 can be adjusted in the front-rear position.
With this configuration, the distance from the work table 6 to the seat 5 can be freely adjusted, and it can be adjusted to an appropriate position according to the type of work, the body shape of the worker, etc. It becomes possible to work with.
Further, front wheels 3L and 3R are provided on the left and right sides of the front part of the vehicle body frame 2, and footrests 7 and 7 are provided on the rear parts of the front wheels 3L and 3R for placing the operator's feet during work. Yes.

As shown in FIGS. 1, 2, 3, 9, and 10, the footrests 7 and 7 are formed by bending a rod-like member into an L shape in a side view and extending in the front-rear direction. The vehicle body frame 2 is suspended below the front wheels 3L and 3R, and the upper end of the vertical portion 7a is fixed to the vehicle body frame 2 and protrudes toward the lower body. A horizontal portion 7b is formed by bending from the lower end of the vertical portion 7a toward the rear of the vehicle body and outward in the vehicle width direction, and a plate-like footrest 7c is fixed on the horizontal portion 7b.
The footrests 7 and 7 are disposed at the rear portions of the front wheels 3L and 3R, and the footrests 7 and 7 protect the rear portions of the front wheels 3L and 3R by projecting the vertical portion 7a inward in the vehicle body width direction. Also, the footrest 7c is disposed obliquely behind the front wheels 3L and 3R so as to serve as a cover, so that the operator's feet are not in contact with the front wheels 3.
With this configuration, the operator's feet do not come into contact with the front wheels during traveling, and a dedicated guard is not required for the front wheels 3L and 3R, and the number of parts can be reduced.

  A seat 5 is provided behind the footrests 7 and 7 in the middle of the vehicle body frame 2 in the longitudinal direction of the vehicle body frame 2. That is, a pipe-like seat frame 11 is provided horizontally in the vehicle body width direction between the front and rear middle portions of the left and right body frames 2, and the seat 5 is disposed on the left and right center portion of the seat frame 11. As shown in FIGS. 7 and 8, the seat 5 has a rotating shaft 5a projecting downward from the center of the lower surface, and the rotating shaft 5a is rotatably inserted into a pipe-shaped bearing 5c. However, as shown in FIG. 8, the flat head pin 5d or the like can be fixed so as not to rotate by passing through the rotating shaft 5a and the bearing 5c.

The bearing 5c is fixed to the front surface of a stay 5b having a quadrangular shape when viewed from the side. The stay 5b is fitted on the seat frame 11 so as to be slidable in the vehicle body width direction, and has a knob. The bolt 15 is screwed from the rear part of the stay 5b, and the bolt 15 with the knob is tightened, so that it can be fixed at any left and right positions on the seat frame 11.
By configuring in this way, the seat 5 is fixed at an arbitrary left and right position according to work, and the seat 5 is rotated when turning to the side or the rear, and the posture can be easily taken when taking a load from the loading platform at the rear. Can be changed.

  A switch case 12 is provided behind the front wheel 3 at the left and right sides of the body frame 2. The switch case 12 is provided with operation means and a control circuit, and the operation means and control circuit of the switch case 12 are electrically connected to a motor 20 which will be described later. It is possible to control the rotation speed and rotation direction

The support portion 12a of the switch case 12 is formed in a cylindrical shape, and is fitted so as to be slidable in the front-rear direction of the body frame 2. By comprising in this way, it becomes possible to move the position of the switch case 12 according to a worker's body shape and custom.
On the other hand, a clutch lever 13 is fixed to the side of the work table 6 as shown in FIG. That is, the clutch lever 13 is mounted on the front frame 10, and the front frame 10 also serves as a handle for supporting the body. The clutch lever 13 is mechanically connected to a clutch mechanism 30 to be described later by a connecting means such as a wire, and the clutch mechanism 30 can be turned on and off by operating the clutch lever 13.

In addition, rear wheels 4 and 4 are disposed on the left and right sides of the rear portion of the vehicle. Hereinafter, the drive mechanism of the rear wheels 4 and 4 will be described with reference to FIGS.
A drive shaft 4 a is provided at the center of the rear wheel 4. A sprocket 21 is fixed through the drive shaft 4a. The sprocket 21 is housed in a chain case 22, and the left and right second sprockets 25L and 25 are attached to the end of the transmission shaft 24 via the chain 23. It is linked with 25R. A third sprocket 26 is provided in the middle of the transmission shaft 24 and is linked to a sprocket fixed to the motor drive shaft 20 a via a chain 27.
The mechanism for transmitting power is not limited to sprockets and chains, and gear transmission and belt transmission are also possible.

  In addition, a battery 41 as a power source for the motor 20 and the switch case 12 serving as a driving source is mounted on the left and right of the rear part of the vehicle body. The drive source is not limited to a motor, and may be an engine or the like. A battery retainer 42 is disposed on the upper surface of the battery 41, bolt holes 42a for inserting bolts 43 are opened on both sides of the battery retainer 42, and a bolt head or nut is provided on one side of the bolt hole 42a. A passable portion 42b that can be passed is provided. That is, the battery retainer 42 is horizontally provided so as to pass through the center of the battery 41 in the front-rear direction. A battery mounting base is fixed on the rear right side of the vehicle body frame 2, a bolt 43 is inserted from below into a bolt hole opened in the battery mounting base, and protrudes upward. The battery 41 is pressed and fixed by screwing a nut onto the upper end of the bolt 43 and tightening it.

An example of the shape of the bolt hole 42a is shown in FIGS.
A bolt hole 42a shown in FIG. 11 is formed in a substantially rectangular shape at both ends in the longitudinal direction of the battery retainer 42 at a substantially central part in the width direction (left and right direction) of the battery retainer 42, and one end of the bolt hole 42a (this embodiment). In the example, the center side of the battery retainer) is formed in a substantially circular shape in plan view to form the passable portion 42b. This circle is formed with a radius larger than the radius of the nut and washer. With this configuration, the nut (or the bolt head in the case of upside down) has a large radius by loosening the nut and shifting the bolt 43 toward the center of the battery retainer 42 (see the arrow direction in FIG. 13). The battery retainer 42 can be easily removed by passing through more easily.
On the other hand, the bolt hole 42a shown in FIG. 12 is formed in a substantially central portion in the width direction of the battery retainer 42 and is formed in a substantially “J” shape at both ends in the longitudinal direction, and one end of the “J” shape is A passable portion 42 b is formed as an open shape at the end of the battery retainer 42. With this configuration, the battery retainer 42 can be easily removed by loosening the nut and moving the bolt 43 in the opening direction (see the arrow direction in FIG. 14).
By configuring as described above, it is possible to remove the battery 41 without frequently performing work when it is frequently removed for charging the battery 41, and the burden is reduced.

The transmission shaft 24 is provided with a clutch mechanism 30 as shown in FIG. The clutch mechanism 30 includes a first clutch 31 and a second clutch 32. The first clutch 31 includes a third sprocket 26 loosely fitted on the transmission shaft 24 and a first slider 50 key-fitted or spline-fitted on the transmission shaft 24, and is disposed between the transmission shaft 24 and the third sprocket 26. The power can be connected or disconnected. Engaging bodies are provided on the opposing side surfaces of the third sprocket 26 and the first slider 50, and the first slider 50 is biased in the engaging direction by a spring 51. The first slider 50 is connected to the clutch lever 13 via a wire.
The second clutch 32 includes a right second sprocket 25 </ b> R and a second slider 52, and enables power connection / disconnection between the right second sprocket 25 </ b> R and the transmission shaft 24. The right second sprocket 25R is loosely fitted on the transmission shaft 24, and the second slider 52 is key-fitted or spline-fitted on the transmission shaft 24 so as to be relatively non-rotatable and slidable. Engaging bodies such as pins are disposed on the opposing sides of the second sprocket 25R and the slider 52, and the slider 52 is urged in the engaging direction by a spring 53. The slider 52 is coupled to the clutch lever 13 via a wire or the like. With this configuration, the motor 20 and the transmission shaft 24 can be disconnected by grasping the clutch lever 13. Further, by turning on and off the clutch lever 13, the connection between the second sprocket 25R and the transmission shaft 24 can be turned on and off.
With this configuration, the first clutch 31 and the second clutch 32 can be disengaged at the same time as the clutch lever 13 is grasped, and the motor 20 and the transmission shaft 24 can be disengaged by disengaging the first clutch 31. The mechanical connection is cut and power transmission is not performed, and the second clutch 32 is set to “off”, whereby the left and right rear wheels 4 and 4 can independently rotate. Therefore, turning and straddling can be easily performed. However, the configuration of the clutch is not limited to pin engagement, and is not limited to a claw engagement type, a multi-plate type, a gear engagement type, or the like.

A bumper 40 for protecting the rear of the vehicle body is provided at the rearmost part of the vehicle body frame 2. The bumper 40 protrudes rearward and upward from the center of the frame at the rearmost part of the vehicle, and the rear end of the bumper 40 is provided on the same vertical line as the rear end of the rear wheel 4. That is, the bumper 40 is disposed so as to protrude rearward and upward from the vehicle body frame 2 in a side view, and the rear end of the bumper 40 and the rear end of the rear wheel 4 are disposed on substantially the same vertical plane.
When storing the vehicle, as shown in FIG. 4, the vehicle front end is lifted and the vehicle rear end is grounded to be stood up and stored. In this case, the bumper 40 and the rear wheels 4 and 4 are the places where the rear end of the vehicle comes into contact with the ground.
With this configuration, the vehicle body can be placed in an upright position without requiring a dedicated part (such as a stand) to be grounded by grounding the bumper originally provided for the purpose of protecting the aircraft during storage. The storage space can be reduced. Further, since the battery, the motor, and the like are arranged at the rear part of the vehicle body, the center of gravity is located rearward, and the front part of the vehicle body can be easily lifted with the rear wheel 4 as a fulcrum.

The side view which showed the whole structure of the agricultural working trolley which concerns on one Example of this invention. The top view of an agricultural work trolley | bogie. The bottom view of an agricultural work cart. The side view which showed the agricultural work trolley at the time of storage. The partial back sectional view of a clutch mechanism. The side view which showed the drive mechanism of the rear wheel. The side view near a seat. The front view of a seat. The top view of a right front wheel and a footrest. The rear view of a left front wheel and a footrest. The perspective view which showed an example of the bolt hole of a battery holder. The perspective view which showed an example of the bolt hole of a battery holder. The perspective view which showed an example of the bolt hole of a battery holder. The perspective view which showed an example of the bolt hole of a battery holder.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Agricultural work cart 2 Body frame 3L, 3R Front wheel 4L, 4R Rear wheel 5 Seat 6 Work table 7 Foot rest 20 Motor 24 Transmission shaft 30 Clutch mechanism 40 Bumper

Claims (3)

  A front wheel and a rear wheel are disposed on the vehicle body frame, power from a motor that is a driving source for movement is transmitted to the rear wheel to drive the carriage, and a battery that supplies electric power to the motor is placed on the rear side of the vehicle body. In the agricultural work cart fixed with a battery retainer and provided with a work table in front of the body frame, a clutch is provided between the motor and the transmission shaft and between the transmission shaft and the wheel, Agricultural work cart characterized in that it is connected and the clutch can be turned on and off simultaneously by operating the operating means.   The agricultural work cart according to claim 1, wherein the work table is configured to be movable in the longitudinal direction of the machine body. A battery retainer is disposed on the upper surface of the battery, holes for inserting bolts are opened on both sides of the battery retainer, and a bolt head or a nut that allows a nut to pass through is provided on one side of the bolt hole. The agricultural work cart according to claim 1, which is provided.

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