JPH0516839A - Four-wheel type riding farm working controller - Google Patents

Abstract

PURPOSE:To provide a four-wheel type riding type farm maintenance machine that is compact in size and simple in structure and, what is more, workable even in space between narrow furrows. CONSTITUTION:This four-wheel type riding farmworking maintenance machine is composed of the following procedures that a transmission case M made up of unitizing a traveling transmission and a farm working transmission in one is set up in the rear of a seat 1, an engine E is mounted on this transmission case M, a body bending part 2 is set up in the central part of a traveling car S, and the seat 1 is set up at the side of steering operation, making it steerable, and drive of a front-wheel axle 30 is made so as to be done via a rear chain case RC, the body bending part 2 and a front chain case FC from a rear-wheel axle 13 of the transmission case M.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compact four-wheeled passenger management machine having a simple structure.

[0002]

2. Description of the Related Art Conventionally, a four-wheeled passenger management machine has been publicly known. For example, it is a technique disclosed in Japanese Patent Laid-Open No. 2-276502. In these, the engine is placed in front, the mission case is placed immediately after the engine, the seat is placed in the center between the front wheels and the rear wheels, and the work equipment lifting link is provided in the rear to attach work equipment such as rotary. It was configured to move up and down.

[0003]

However, in the conventional four-wheeled passenger management machine, the power transmitted from the engine to the mission case is transmitted to the front and rear axles and the working machine via the belt and the drive shaft. Since the power transmission structure was transmitted, it was necessary to provide separate power transmission paths for each structure, and the structure was complicated, and there was a limit to downsizing the airframe. Also, since power is transmitted from the transmission case of this machine to the rotary gear case, a large number of power transmission units are required in the middle, transmission loss increases, and the link structure for raising and lowering the working machine also has a two-point or three-point link type. Since the elevating device is provided, the structure becomes complicated and a space for arranging the elevating device and a rotating space are required.

[0004]

The present invention uses the following means in order to solve the above problems.
That is, in the four-wheeled passenger management machine, the mission case M, which integrates the driving of the running machine and the drive of the working machine, is arranged at the rear of the seat 1, the engine E is mounted on the mission case M, and the fuselage is provided at the center of the traveling vehicle S. The refraction unit 2 is arranged, the seat 1 is arranged on the steering operation side, and the body 1 is configured to perform steering by refraction. Further, it has a mission case M in which a rear wheel drive mission and a work machine drive mission are integrally provided, and a rear chain case RC, a body bending section 2, a front chain from the rear wheel axle 13 of the mission case M. It is configured to transmit power to the front wheel axle 30 via the case FC.

[0005]

The object and structure of the present invention are as described above.
Next, an embodiment shown in the attached drawings will be described. 1 is a side view of a four-wheeled passenger management machine of the present invention, FIG. 2 is a perspective view showing a power transmission system of a traveling vehicle S, FIG. 3 is a plan view showing a steering structure of the traveling vehicle S, and FIG. Plan view of section 2, FIG.
Is a side view of the same, FIG. 6 is a front view of a four-wheeled passenger management machine running in a furrow, and FIG. 7 is a mission case M and a rotary R.
It is a side view which shows the raising / lowering mechanism.

First, the overall configuration will be described with reference to FIG.
The four-wheeled passenger management machine of the present invention is of a type in which a rotary R is mounted on the rear portion of the traveling vehicle S via a transmission case M that drives the rear wheels RW and the rotary R. The traveling vehicle S has a body bending portion 2 arranged in the center, and front and rear wheels FW and rear wheels RW are axially supported in front of and behind the body bending portion 2 via a front chain case FC and a rear chain case RC, respectively. The front chain case FC and the rear chain case RC are pivotally supported at fulcrums P and P ′, respectively, and the vehicle heights of the front wheels FW and the rear wheels RW are between AA ′ depending on the mounting angles of both chain cases. It is configured to be adjustable.
A seat 1 is fixedly mounted on the upper part of the body bending portion 2, a steering wheel shaft 4 is erected from the center between the left and right front wheels FW, and a steering wheel 3 is attached. In the rear part of the traveling vehicle S, the rear wheels RW and the rotary R are configured to be drivable by the mission case M, and the lifting actuator 5 is connected to the mission case M from a fulcrum P ′ of the rear chain case RC. The engine E is mounted on the mission case M and the rotary R,
By arranging the components in this way, the operator's forward view is very good.

Next, the power transmission system will be described with reference to FIG. The driving force of the engine E rotates the pulley 9 from the pulley 7 via the belt 8 in the belt case B, and further rotates the sprocket 10 in the mission case M.
To drive. In the transmission case M, the drive of the sprocket 10 is transmitted to the rear-wheel drive sprocket 12 via the chain 11, and the rear-wheel axle 13 is rotated to drive the rear-wheel RW mounted on both ends of the rear-wheel axle 13. Drive. On the other hand, the drive of the sprocket 10 is transmitted to the rotary drive sprocket 15 via the chain 14 to drive the center drive type rotary R. However, it is possible to provide a transmission for traveling and a working machine in the mission case M. As described above, the mission case M has a simple structure in which the rear wheels RW and the rotary R are integrally driven. Therefore, the mission case of the conventional walking management machine can be diverted.

The power for driving the rear wheels RW is further increased by the front wheels FW.
Be transmitted to. That is, the rear shaft 2 that forms the pivot point P ′ from the rear wheel axle 13 via the sprocket 17, the chain 18, and the sprocket 19 in the rear chain case RC.
The power is transmitted to the bevel gear 21 fixed to 0, the rear bevel gear 22 is meshed with the bevel gear 21, and the rear bevel gear 22, the universal joint 23, and the front bevel gear 24 are provided in the body bending portion 2 to pivot P
Is transmitted to the bevel gear 26 fixed to the front shaft 25 that forms the front shaft 25, and further rotates the front wheel axle 30 via the sprocket 27, the chain 28, and the sprocket 29 in the front chain case FC to drive the front wheel FW. . The vehicle heights of the front wheels FW and the rear wheels RW can be adjusted as described above by adjusting the meshing positions of the bevel gears at the pivot points P and P '.

Next, the steering mechanism will be described with reference to FIGS. 1, 3, 4, and 5. First, as shown in FIG. 3, a bottom gear 31 for steering is fixedly mounted on the lower portion of the steering wheel shaft 4, and meshes with a gear portion 32b of a front rod 32 for steering. The steering wheel shaft 4 and the shaft of the gear portion 32b are fixed to the steering receiving member 3 projecting forward from the front block 2a of the body bending portion 2.
3 is rotatably supported. Further, a steering rear rod 34 is fixedly mounted on the rear block 2b of the body bending portion 2, and a steering link 35 is pivotally connected between pivot support points 32a and 34a of both rods. With this configuration, when the steering wheel 3 is rotated, the steering wheel shaft 4 and the steering bottom gear 3 move in the same direction.
1 rotates, and accordingly, the front rod 3 for steering
2 rotates in the opposite direction, and the steering link 35 rotates to the turning side by the steering wheel 3 with the pivot point 34a as the fulcrum.

The structure of the body refracting portion 2 will be described with reference to FIGS. 4 and 5. In the body refracting portion 2, the front block 2a and the rear block 2b have bearings 36.
The front block 2a is rotatably pivoted via 36, and the front block 2a rotates about the shafts 2c and 2c as a fulcrum with the rotation of the steering link 35.
Since a and the front wheel FW are connected by the front chain case FC, the front wheel FW is rotated with the rotation of the front block 2a to change the direction. In addition,
Inside the body bending section 2, a rear shaft 20, which is a power transmission system for transmitting the drive of the rear wheels RW to the front wheels FW, and the bevel gear 2
1, rear bevel gear 22, universal joint 2
3, the front bevel gear 24, the front shaft 25, and the bevel gear 26 are fitted, and the universal joint 23 bends as shown in FIG. 4 according to the refraction of the body refracting portion 2 associated with the steering operation. The central shaft 23a of the universal joint 23 is expandable and contractible.
Refraction is free. In this way, the power transmission from the rear wheels RW to the front wheels FW is not hindered by the body refraction caused by the steering. In addition, sheet 1 is
Since it is fixed on the front block 2a, the turning direction of the front wheel FW and the direction of the operator are the same, and smooth work is possible.

The four-wheeled passenger management machine of the present invention is small in size and the width between the left and right wheels can be reduced by devising the arrangement of parts, while the center of gravity is behind the seat 1 and is stable at a low center of gravity. , The aircraft is stable even if the wheel width is narrow,
In the front-rear direction, the operator rides to balance the work, and as shown in FIG. 6, it is possible to work even in a narrow ridge U of about 50 cm, which was impossible with the conventional riding management machine.

Finally, the lifting mechanism of the rotary R will be described with reference to FIG. In the present invention, the rotary R is
It is integrated with the mission case M, and as the mission case M is raised and lowered, the rotary R is raised and lowered. The mission case M is connected to the rear wheel axle 13 at the rear wheel sprocket 12, and the lifting actuator 5 is connected to the mission case M from the rear shaft 20 at the pivot point P ′. The lifting actuator 5 is composed of a hydraulic cylinder, an electric cylinder, or a manual feed screw. The mission case M moves up and down with the rear wheel axle 13 as a rotation fulcrum by an operation of expanding and contracting the elevating actuator 5 and rotating around the pivot fulcrum P '. The engine E is also mounted on the mission case M and moves up and down together. As described above, the raising and lowering of the rotary R and the driving portion of the rotary, which have tended to be complicated in the past, can be performed only by raising and lowering the operation of the raising and lowering actuator 5 of the mission case M having the integrated rotary driving portion. A simple rotary lift is possible.

[0013]

Since the present invention has the above-described structure and embodiment, it has the following effects. First, a compact and low center-of-gravity four-wheeled passenger management machine could be constructed, which enabled work even in narrow ridges. Secondly, the operator's seat position is at the front of the machine, so the visibility in the front is very good and the work is easy. Thirdly, the vehicle height can be easily adjusted by changing the attachment angles of the front and rear chain cases, and the work posture in the front and rear direction can also be adjusted. Fourth, the power transmission to the traveling vehicle S and the rotary R is simplified and the structure is simplified, which contributes to downsizing and cost reduction. Fifthly, by making the steering structure a body refraction type, it is possible to turn in a small radius, and moreover, the seat 1 turns together with the turning direction of the front wheels FW, so that a smooth turn can be obtained. Sixth, the mission case of the conventional walk-behind control machine can be diverted to the mission case M having a structure in which the rear wheels RW and the rotary R are integrally driven, and the development cost can be reduced. Seventh, a low-cost 4-wheel riding management machine can be obtained, and the manufacturing cost is about the middle of that between a walking management machine and a conventional tractor-type riding management machine, and it is easy to operate and requires less labor. It became possible.

[Brief description of drawings]

FIG. 1 is a side view of a four-wheeled passenger management machine according to the present invention.

2 is a perspective view showing a power transmission system of a traveling vehicle S. FIG.

3 is a plan view showing a steering structure of a traveling vehicle S. FIG.

FIG. 4 is a plan view of a body refraction unit 2.

FIG. 5 is a side view of the same.

FIG. 6 is a front view of the four-wheel riding management machine while traveling in a furrow.

FIG. 7 is a side view showing a lifting mechanism for a mission case M and a rotary R.

[Explanation of symbols]

S traveling vehicle R Rotary M mission case E engine FW front wheel RW rear wheel FC front chain case RC rear chain case 1 sheet 2 body refraction part 2a front block 2b rear block 3 steering wheel 5 Lifting link 13 Rear wheel axle 30 front wheel axle

Claims (2)

[Claims] 1. In a four-wheeled passenger management machine, a seat 1 is a mission case M in which traveling and working machine drive are integrated.
It is arranged rearward, the engine E is mounted on the mission case M, the body bending section 2 is arranged in the center of the traveling vehicle S, the seat 1 is arranged on the steering operation side, and steering is performed by body bending. A four-wheeled passenger management machine characterized by the above. 2. A four-wheeled passenger management machine, comprising a mission case M in which a rear wheel drive mission and a work machine drive mission are integrally provided, and the rear chain from the rear wheel axle 13 of the mission case M. A four-wheeled passenger management machine configured to transmit power to the front wheel axle 30 via the case RC, the body bending portion 2, and the front chain case FC.