JPH0623404U - Self-propelled upland farming machine - Google Patents

Abstract

(57) [Summary] [Purpose] A low-noise self-propelled upland farming machine that automatically corrects the direction of travel even when the wheels hit the sides of the ridge. [Structure] In a self-propelled upland farming machine comprising a vehicle body frame having front wheels and rear wheels attached thereto, a traveling means attached to the vehicle body frame, and a seat attached to the vehicle body frame, an electric motor is used as a drive source of the traveling means. The vehicle body frame is provided with a wheel width adjusting means for adjusting the width between the wheels to be wide and narrow, and the vehicle body frame is provided with an automatic rectilinear means for changing the front wheel side to an appropriate direction according to the ridge condition. The electric motor is a battery-powered DC motor, which allows the battery to move forward and backward.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a self-propelled upland field working machine capable of automatically adjusting a traveling direction.

[0002]

[Prior art]

 The areas where seedlings such as strawberries, Chinese cabbage, and lettuce are planted in the field are the ridges of the long soil, and the low parts between the ridges are the grooves, and the section of the field is continuous and uneven. . A self-propelled four-wheeled field working machine that runs wheels is used in the grooves on both sides of the ridge, and the operator rides backwards with respect to the forward direction and plant seedlings by hand in the ridges directly below and on the left and right sides. . Mark the areas where seedlings are to be planted before seedling work. Foot rests are provided on the left and right to allow workers' feet to rest.

[0003]

[Problems to be solved by the device]

 An engine is usually used as the drive source, but it is a pollution problem because of the large noise and vibration. During the work, the traveling direction may bend and the wheels may hit the side surface of the ridge, and the wheel may ride on the ridge. The traveling direction is adjusted each time, but this impairs the efficiency of seedling work.

Further, since the footrest is fixed, the position of the worker becomes unsuitable depending on the physique of the worker and the type of seedling, which reduces work efficiency and increases fatigue. Note that the position of the center of gravity may shift due to the relationship between the weight of the worker and the position of the battery and deviate from the appropriate range, in which case either the front or the rear of the vehicle tends to float up, which hinders stable traveling. Becomes

[0005]

[Means for Solving the Problems]

 As a means for solving the above problems, the present invention provides a self-propelled upland field working machine comprising a vehicle body frame having front wheels and rear wheels attached thereto, traveling means attached to the vehicle body frame, and a seat attached to the vehicle body frame. Using a motor as the drive source of the traveling means, the wheel width adjusting means for adjusting the width between the wheels to the vehicle body frame is provided, and the wheels on the front wheel side relative to the vehicle body frame are appropriately oriented according to the ridge condition. The automatic straight advance means consisting of the yawing means and the rolling means is provided. The tip of the footrest can be adjusted vertically. In addition, the electric motor is a battery-driven DC electric motor that allows the battery to move forward and backward.

[0006]

[Action]

 Since it uses an electric motor as a drive source, it is quiet during operation. If the ridge spacing changes, adjust the wheel width and position the wheel in the approximate center of the groove. When the wheel hits the side of the ridge, the wheel is free to yaw and roll, so the wheel moves away from the side of the ridge and the traveling direction is automatically corrected.

[0007]

【Example】

 A self-propelled upland field working machine according to the present invention will be specifically described below based on an embodiment shown in the drawings. FIG. 1 shows the entire view of the self-propelled upland farming machine 1, and the left side in FIG. 1 is the forward direction A, that is, the front. A front arm 3 is attached to a front portion of the vehicle body frame 2, and front columns 5 extend downward from both left and right ends of the body frame 2, and a front wheel 7 is pivotally supported near a lower end of the front column 5 via a front axle 19. Similarly, a rear wheel 8 is pivotally supported via a rear arm 4, a rear strut 6, and a rear axle 20 mounted on the rear of the body frame 2.

A power transmission shaft 9 is laterally rotatably supported between the left and right rear columns 6, and forms a part of power transmission means from an electric motor 12 described later.

The seat 10 is supported by a lower support frame 2 a fixed to the vehicle body frame 2, and its position can be adjusted in the vertical direction. The worker W sits rearward on the seat 10 attached to the lower support frame 2a, and puts his / her foot on the step 11a at the tips of the left and right footrests 11 projecting rearward.

FIG. 3 shows a structure near the power transmission means. The electric motor 12 is a battery-driven DC electric motor, and is supported from the rear supporting column 6 via a bracket. A drive chain 15 is stretched between a sprocket 13 fixed to the output shaft of the electric motor 12 and a sprocket 14 fixed to a corresponding position of the power transmission shaft 9. A sprocket 16 is fixedly mounted near the rear strut 6 of the power transmission shaft 9, and a drive chain 18 is stretched between the sprocket 17 fixed to the right and left rear axles 20. The power of the electric motor 12 is transmitted to the left and right rear wheels 8 by such power transmission means. Since a quiet electric motor is used as the drive source and no engine is used, noise and vibration are extremely low.

Alternatively, the axle and the power transmission shaft are formed by forming a hexagonal shaft and fittingly connecting the power transmission shaft, and the rotational force of one axle is transmitted to the other axle for driving, or the axle and the power transmission are transmitted. The rotation force of one axle is transmitted to the other axle by means such as interposing a key at the connecting portion of the axle, and the other wheel is driven.

Wheel width adjusting means are also shown in FIGS. 3 and 5. With respect to the front wheel 7, sliding portions 3a are formed on the left and right of the front arm 3, and the upper end of the front support column 5 is provided with a slidable sheath portion 5a into which the sliding portion 3a is laterally inserted. Has been. That is, the sliding portion 3a is fitted to the sheath portion 5a supporting the front wheel 7, and both members are fastened with the bolt V. Therefore, the position of the front support column 5 in the width direction is displaceable with respect to the front arm 3, and the wheel spacing in the width direction of the front wheels 7 can be adjusted wide and narrow. Regarding the rear wheel 8, the rear column 6 is also displaceable in the width direction with respect to the rear arm 4 via the sliding portion 4a and the sheath portion 6a. That is, the sliding portion 4a is fitted to the sheath portion 6a supporting the rear wheel 8 and both members are fastened with bolts V. The power transmission shaft 9 provided laterally between the left and right rear columns 6 is also expandable and contractable around the connecting tube 9a, and expands and contracts integrally with the lateral displacement of the left and right rear columns 6. Therefore, the position of the rear support column 6 in the width direction is freely displaceable with respect to the rear arm 4, and the wheel spacing in the width direction of the rear wheel 8 can be adjusted. As described above, the wheel width adjusting means is formed for each of the front wheels 7 and the rear wheels 8.

FIG. 4 shows the vicinity of the automatic rectilinear movement means 21, FIG. 5 shows the structure thereof, and FIG. 6 shows the details of the structure. Since the direction of the front wheel 7 is fixed at right angles to the front arm 3, the direction of the front wheel 3 can be changed to change the direction of the front wheel 7. An automatic rectilinear moving means 21 is formed near the center of the front arm 3. A plate-shaped support portion 23 fixed to the vehicle body frame 2 and projecting forward is close to above the central portion of the front arm 3. Below the vicinity of the tip of the support portion 23, a columnar support body 22 serving as a rotating member is disposed on the front side of the front arm 3.

A vertical pin 24 projects downward from the vicinity of the tip of the support portion 23. A vertical hole 24a into which the vertical pin 24 can be inserted is formed in the center of the support 22. A horizontal pin 25 is horizontally projected from the center of the support body 22 in a rearward direction. The front arm 3 is hollow, but a solid support 25b is fixedly installed inside the central portion to form a solid shape, and the front arm 3 and the support 25b are integrated into a solid portion. A horizontal hole 25a into which the horizontal pin 25 can be inserted is bored in the hole. Threads are threaded near the tips of the vertical pins 24 and the horizontal pins 25.

At the time of assembly, the vertical pin 24 of the support portion 23 is inserted into the vertical hole 24a of the support body 22, and the horizontal pin 25 of the support body 22 is inserted into the horizontal hole 25a of the forearm 3 and the pivot body 25b. The nuts 24b and 25c are screwed together to prevent the nuts from coming off. A washer 24c is inserted into the vertical pin 24 between the support portion 23 and the support body 22, and a washer 25d is inserted into the horizontal pin 25 between the support body 22 and the front arm 3, respectively, and the rotation described later is performed. It is smooth.

The front arm 3, which is a front wheel support member, is capable of yawing, which is a rotation in a horizontal plane with respect to the support portion 23, and thus the body frame 2, about the vertical pin 24 via the support body 22. Are formed. Further, it is rotatable about the horizontal pin 25 in a vertical plane perpendicular to the traveling direction with respect to the support body 22, and rolling means is formed. Therefore, the front wheels 7 can yaw and roll with respect to the body frame 2. Therefore, when the front wheel 7 comes into contact with the side surface of the ridge due to the curved traveling direction, the traveling direction is automatically corrected immediately. That is, a simple and effective automatic rectilinear movement means 21 is formed.

FIG. 2 is a side view of the self-propelled upland farming machine 1, which runs in the forward direction A when planting seedlings. The worker W mounts rearward, puts his left and right feet on the steps 11a at the tips of the left and right footrests 11 projecting rearward, and picks the seedlings N from the seedling box 37 placed on the seedling box support base 37a. Take and plant seedlings in the lower ridge. The seedling box support 37a can be adjusted in the front-rear direction. Reference numeral 38 denotes a spare seedling box, which is placed on a spare seedling box support base 38a arranged in a front space.

A support pin 6b is fixed to the lower support frame 2a, and an adjustment pin 6c is attached to the rear of the lower support frame 2a so as to be movable back and forth and biased outward. A support hole 11b into which the support pin 6b can be inserted is formed in the base end portion of the footrest portion 11, and adjustment holes 11c, 11d and 11e into which the adjustment pin 6c can be inserted are provided behind the support hole 11b at substantially equal pitches in the vertical direction. It has been drilled. The footrest 11 is rotatably supported by a support pin 6b in a support hole 11b at the base end, and is fixed at a desired inclination by any of the adjustment holes 11c, 11d, 11e and the adjustment pin 6c. The step 11a at the tip of the footrest can be adjusted in the vertical direction by the footrest adjusting means thus formed.

The battery 26 is movable in the front-rear direction and forms a center of gravity position adjusting means of the self-propelled upland field working machine 1. A battery support 27 is fixed to the upper portion of the body frame 2. A sliding portion 29 is provided below the battery box 28 accommodating the battery 26, and is used for grasping and pulling in the grip 29a. The sliding hole 30 is formed in the battery support base 27 in the front-rear direction. It can be slid back and forth by being inserted into. The battery box 28 is moved in the front-rear direction according to the weight of the worker W, and the position of the center of gravity is adjusted within an appropriate range to enable stable traveling. Reference numeral 26a is a charging socket for the battery 26, which is connected to a power source outside the machine to charge the battery 26.

Stoppers 31 are installed on the left and right of the rear end of the vehicle body frame 2, and contact plates 32 are fixed to the front arms 3 at positions corresponding to the stoppers 31, respectively. When the front arm 3 yaws, the contact plate 32 contacts the stopper 31, so that the range of rotation of the front arm 3 is limited. In order to adjust the turning range, the stopper 31 can be adjusted in the front-back direction. Reference numeral 33 denotes an operation panel, which is provided with a speedometer 34, a start switch 35, an overload prevention switch 36, and the like.

The self-propelled upland farming machine 1 travels in the reverse direction B by reversing the running direction, in addition to the above-described method of running in the forward direction A to perform seedling work, and harvests spinach and strawberries. There are usages to do the work.

[0022]

[Effect of device]

 In the present invention, since the electric motor is used as the drive source and the engine is not used, it is quiet and vibration-free, which is extremely effective for pollution prevention.

Further, since the wheel width can be freely adjusted in the width direction by the wheel width adjusting means, it is possible to position the wheel substantially at the center of the groove between the ridges even if the ridge interval changes. Further, since the wheels can be yawed and rolled automatically by the automatic straight traveling means, even if the running direction is curved and the wheels come into contact with the side surface of the ridge, the running direction is automatically corrected immediately.

Moreover, since the tip of the footrest can be adjusted up and down, it is possible to perform a rational work according to the posture of the worker and the type of seedling. Further, since the position of the battery can be adjusted by the center-of-gravity position adjusting means, the center-of-gravity position can be adjusted within an appropriate range to stabilize traveling.

[Brief description of drawings]

FIG. 1 is a landscape view of a self-propelled upland farming machine according to the present invention.

FIG. 2 is a laterally long side view of a self-propelled upland farming machine according to the present invention.

FIG. 3 is a laterally long view showing the structure near the power transmission means of the self-propelled upland field working machine according to the present invention.

FIG. 4 is a horizontally elongated view showing the vicinity of the automatic straightening means of the self-propelled upland field working machine according to the present invention.

FIG. 5 is a laterally long view showing the structure in the vicinity of the automatic rectilinear movement means of the self-propelled upland field working machine according to the present invention.

FIG. 6 is a horizontal view showing details of the structure of the automatic rectilinear movement means of the self-propelled upland field working machine according to the present invention.

[Explanation of symbols]

 1 Self-propelled Upland Farming Machine 2 Body Frame 7 Front Wheel 8 Rear Wheel 10 Seat 11 Footrest 12 Electric Motor 21 Automatic Straightening Means 26 Battery

Claims (4)

[Scope of utility model registration request] 1. A body frame having front wheels and rear wheels attached,
In a self-propelled upland field working machine comprising a traveling means attached to the vehicle body frame and a seat attached to the vehicle body frame, an electric motor is used as a drive source of the traveling means, and the width between wheels is adjusted to be wide and narrow with respect to the vehicle body frame. A self-propelled upland field working machine characterized in that it is provided with a wheel width adjusting means, and an automatic rectilinear means for changing a front wheel side wheel to an appropriate direction according to a ridge condition with respect to a body frame. 2. The automatic rectilinear movement means comprises yawing means and rolling means, and the yawing means rotates the rotation member around an axis provided vertically to the vehicle body frame side, whereby the rolling means moves the rotation member. By rotating the front wheel support member around an axis horizontally provided in the front-back direction,
The self-propelled upland farming machine according to claim 1, characterized in that each is configured. 3. The self-propelled upland field working machine according to claim 1 or 2, further comprising a footrest adjusting means capable of vertically adjusting a tip of the footrest. 4. The self-propelled electric motor according to claim 1, wherein the electric motor is a battery-driven DC electric motor, and has a center-of-gravity position adjusting means that allows the battery to move in the front-back direction. Upland work machine.