JPH1084709A - Upwards and downwards moxing link for attaching work machine of mobile agricultural machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To execute a vertically moving operation without largely changing the attachment attitude of a work machine by attaching the upper part of the work machine to the tip part of a hitch with an extension plate and executing connection between the lower part of the work machine and a machine frame by means of a lower part link. SOLUTION: A rocking arm 4 is made to be rocking possible in vertical direction by an actuator 3 with a supporting shaft 2 provided at the front part of a rear axle 1 as a rocking center. An upper part hole 5 is provided at the tip part of the rocking arm 4 which is projected at the rear part by detouring the upper part of the rear axle 1. Then, the upper part of a hanging link 7 having a right and left restraining part 6 is pivotally supported at the lower part of the upper part hole 5 and front and rear pivotal supporting is executed between the lower part of the hanging link 7 and the rear axle 1 with the lower part link.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting and lowering link for a working machine of a mobile agricultural machine. This work equipment mounting lifting link
The present invention relates to an apparatus for moving a working machine up and down in a substantially parallel link by adding some parts to a two-point link.

[0002]

2. Description of the Related Art In a farm tractor, when a working machine is attached to the front and rear ends of a body, it is usually attached via a three-point link of a top link and a left and right lower link.
Some use a two-point link to attach the work equipment close to the aircraft.Generally, medium to large farm tractors often use a three-point link, and small farm tractors use a two-point link. There are many things to use.

[0003]

However, when the working machine is formed as a two-point link in order to approach the machine body, the working machine attached to the hitch at the tip of the two-point link has the working machine locked to the two-point link. Because of the mounting, the posture of the working machine changes greatly back and forth with a slight lifting operation, and the range of adjustment of the proper posture during work is narrow, making it difficult for beginners to use.

[0004]

SUMMARY OF THE INVENTION The present invention is to solve such a problem of the conventional device, and has taken the following technical means. That is, the actuator 3 is pivoted about the support shaft 2 provided in front of the rear axle 1 as a swing center.
The swing arm 4 which is swingable in the vertical direction by virtue of the swing arm 4 projecting rearward, bypassing above the rear axle 1.
An upper hole 5 is provided at the end of the suspension link 7, and an upper portion of a suspension link 7 having left and right locking portions 6, 6 is pivotally mounted on the upper hole 5, and the lower portion of the suspension link 7 and the above-described rear axle 1 is mounted on the front and rear shafts through the lower link 8 so as to have a construction of a working machine mounting and lifting link of a mobile agricultural machine.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The figure shows a passenger management machine 9 which is an agricultural tractor.
The present invention is folded into a two-point lifting link 10 provided at the rear of the aircraft, and will be described below. The riding management machine 9 is a mobile farming machine for management work traveling in a paddy field. The front and rear are large-diameter, narrow, equal-diameter wheels, and the four-wheel drive has a minimum ground clearance of about 500 mm. And running in the field after rice transplantation.

As described above, the front and rear wheels 11 and 12 having the same diameter are disposed in front and rear of the body, and the front axle case 13 and the rear axle 1 connect the front wheels 11 and 11 and the rear wheels 12 and 12 respectively. ing. The left and right portions of the main frame 1 extend between the front axle case 13 and the rear axle 1.
They are connected by 5, 15 to constitute the strength member of the fuselage. The left and right main frames 15, 15 are spaced at a fixed interval, and the elevating link 10 is disposed at a rear portion within this interval, and an engine 16 is mounted on an upper portion between the front wheels 11, 11 at a front portion. The driving force of the engine 16 is transmitted to the transmission case 17 via a rotary transmission (not shown), and drives the front and rear wheels 11 and 12 and drives the PTO shaft 19 projecting rearward from the PTO gear case 18.

Reference numeral 20 denotes a hood, which covers the outside of the engine 16, and an instrument panel 21 at the rear end of the hood 20.
And a handle 22 are provided. Reference numeral 23 denotes a seat, which supports the main frame 15 via a box 24. A floor 25 is provided from the foot of the driver sitting on the seat 23 to above the rear wheel 12. Reference numeral 14 denotes an elevating lever, which operates an oil passage switching valve (not shown) provided in the box 24 to extend and retract a hydraulic cylinder, which will be described later, to raise and lower the working machine.

An elevating link 10 which is a two-point link has a right and left two arms in a "F" shape when viewed from the side, and has a left and right mounting boss 2 projecting forward from a rear axle 1 at a front base end.
6 and 26 are pivotally mounted on a support shaft 2 so as to be vertically swingable. A swing end protruding rearward and bypassing the rear axle 1 is integrally connected to a left and right portion by a hitch 27. doing. An extension plate 28 having an upper hole 5 opened at the rear is attached to the hitch 27.
The extension plate 28 constitutes the swing arm 4 which is a main part of the present invention.

At the middle of the elevating link 10, the telescopic end of an actuator 3, which is a telescopic hydraulic cylinder, is
The lifting link 10 is vertically moved by the expansion and contraction operation of the actuator 3 attached to the main frame 15 with the base end attached. Elevating link 1
The upper part of the suspension link 7 is pivotally mounted on a rear end upper hole 5 of the swing arm 4 composed of the rear axle 1 and the rear axle 1 by a pin or the like. The length in the front-rear direction is regulated by lower links 8, 8 attached to the lower left and right sides, and the swing is freely mounted on the mounting pins 30, 30. When the front and rear lengths of the swing arm 4 and the lower link 8 are substantially the same, the suspension link 7 moves like a parallel link that moves up and down in the same posture, and ascends when the corresponding length of the lower link 8 decreases. Accordingly, the lower part of the suspension link 7 moves forward quickly, and as the corresponding length of the lower link 8 increases, the upper part of the suspension link 7 moves forward quickly with the rise.

When viewed from the rear, the suspension link 7 has an upper hole 5 at a substantially central position in the left-right direction and three attachment portions having locking portions 6 and 6 on the lower left and right. A work machine, for example, a rice transplanting device 31 is attached to the attachment portion. Rice transplanting equipment 31
Has a seedling mounting table 32 in the upper front part, a float 33 in the lower front-rear direction, and a plurality of plantings 35, 35. . The center engaging portion 36 and the left and right engaging portions 37, 37 are connected to the upper hole 5 and the locking portions 6, 6 of the suspension link 7 via a locking tool such as a pin or a hook. By locking, the rice planting device 31 can be adjusted by the actuator 3 by operating the elevating lever 14.

Reference numeral 38 denotes a cart, which is a support base for removing and storing the rice transplanting device 31.
, The work machine can be attached to the suspension link 7 of the passenger management machine 9 with a light operating force. Although not shown, if the lower link 8 is made into two members and a spring is inserted in the middle to make it expandable and contractable, even a working machine having many components such as the rice planting device 31 can reduce the impact at the time of traveling and cause less damage. It is also possible.

FIG. 5 and FIG. 6 illustrate the construction of another essential part, in which a water tank 39 for spraying, which is another working machine, is attached around the seat 23 of the passenger management machine 9. It is. The water tank 39 is a box having a U-shaped front opening in a plan view, and is mounted on the floor 25 with the seat 23 positioned at the front opening. The left and right support columns 4 of the safety frame 40
1, 41 are protruded.

The left and right supports 41, 41 of the safety frame 40
The upper end of the rear axle 1 is bent inward at the lower end, and a mounting plate 42 integrally provided at the bent end is provided on the upper surface of the rear axle 1 with fasteners 43, 43. .
It is attached firmly. With this safety frame 40, a safety space is created around the driver, and extra spaces 44, 44 are created around the water tank 39, so that the driver's safety is improved when the passenger management machine 9 falls. Also, damage to the water tank 39 can be prevented.

FIG. 8 shows another form of the safety frame 4.
0a, the upper portions of the left and right columns 41a are narrow from the middle, and stoppers 45, 45 are provided below the narrow portions. The tank in this example is a powder tank 46, and dusts such as fertilizers and medicines sprayed on the surface of the field are sprayed from spray pipes 47, 47 spread to the left and right by the wind of a blower (not shown) along the machine body at the end of the work. The folding spray pipe 47 is supported by the stopper 45.

[0015]

According to the present invention, a swing arm 4 which can be vertically swung by an actuator 3 with a support shaft 2 provided in front of a rear axle 1 as a swing center is detoured above the rear axle 1 and rearward. An upper hole 5 is provided at the tip end of the protruding swing arm 4, and an upper portion of a suspension link 7 having left and right locking portions 6, 6 below the upper hole 5 is pivotally mounted.
Since the lower part of the suspension link 7 and the above-mentioned rear axle 1 are attached to the front and rear shafts via the lower link 8, the lifting and lowering link is attached to the working unit of the mobile agricultural machine. Since the working device can be vertically moved up and down while maintaining a state in which the posture of the working device is less likely to change than the state of the two-point link, the height of the working device can be easily adjusted, and a lifting link that is easy for even a beginner to use can be provided at low cost.

[Brief description of the drawings]

FIG. 1 is a side view of a main part.

FIG. 2 is an overall side view of the passenger management machine.

FIG. 3 is an overall plan view of FIG. 2;

FIG. 4 is an overall rear view of FIG. 2;

FIG. 5 is an overall side view in which another important part of the safety frame is attached.

FIG. 6 is an overall front view of FIG.

FIG. 7 is an enlarged perspective view of a lower end mounting portion in FIG. 5;

8 is another embodiment of the safety frame of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rear axle 2 Support shaft 3 Actuator 4 Swing arm 5 Upper hole 6 Locking part 7 Suspended link 8 Lower link

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Masato Nagai 1-Yachikura, Tobe-cho, Iyo-gun, Ehime Prefecture Iseki Agricultural Machinery Co., Ltd.

Claims (1)

[Claims] An oscillating arm (4), which is swingable in a vertical direction by an actuator (3) with a support shaft (2) provided in front of a rear axle (1) as a swing center, protrudes rearward from a position above the rear axle (1). The upper end of the moving arm 4 is provided with an upper hole 5, and the upper portion of the suspension link 7 having left and right locking portions 6, 6 is pivotally mounted on the upper hole 5.
A work machine mounting and lifting link for a mobile agricultural machine, wherein the lower axle and the above-mentioned rear axle 1 are attached to the front and rear shafts via a lower link 8.