JPH0560322B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a work machine for digging up rhizomes, which is mounted on the rear of a tractor body via a three-point link hitch so as to be able to rise and fall freely. Among these, a type of shank for digging rhizomes is constructed by installing a pair of shanks, each of which is equipped with a spatula-shaped guide member extending rearward at the bottom, in parallel to face each other on the left and right. It is related to work equipment.

[Prior art] The above-mentioned working machine for digging rhizomes was developed in Japanese Patent Application Laid-Open No. 1983-1989.
-As stated in Publication No. 102114, this product was developed by the applicant of the present application so that rhizomes such as Japanese yam that grow or grow underground can be scooped up along with the soil without damaging them. Satisfactory results can be obtained in fields with suitable soil types.
It contributes to the digging of rhizomes to some extent.

[Problem to be solved by the invention] However, when carrying out work by connecting it to the rear of the tractor body, the traction resistance is large, and a lightweight and small tractor with around 20 horsepower cannot perform sufficient excavation work. In addition, in areas where the soil in the field is highly viscous, the long spatula-shaped guide member at the bottom of the shank holds the soil in which rhizomes are cultivated from the left and right along with the rhizomes, and gradually raises the soil. When the soil is dug up, the soil holds the rhizomes firmly and does not separate from the rhizomes, and is carried to the rear end of the guide member, and is carried backward from the rear end of the guide member. There is a problem in that the rhizomes that have risen up when they are separated when they are removed sink down again, making it impossible to dig up the rhizomes in a state where they are floating.

By the way, when operating a working machine underground, it has been known that at least the working part that shears the soil is vibrated to reduce cutting resistance and traction resistance. It is used as a vibrating subsoiler or a vibrating mole culvert (bullet culvert).

Previously, this means used a link type or cam type in which the working part was vibrated by a vibrating device, and the direction of vibration of the working part was in the vertical direction. There are two types: one that moves in a circular motion in the front and back directions relative to the pulling direction of the tractor, and one that moves circularly in the back and forth direction.

Of these means, in the former case where the vibration direction is the vertical direction, a three-point link hitch installed at the rear of the tractor body connects the left and right lower links and the lift arm to the lower link below. The movement of the machine is restricted, but the upward movement is allowed within a certain range, so that when the work equipment supported via this three-point link hit is moved downward by the vibration exciter, it sticks into the soil. The problem arises that the three-point link hitch is moved upward by the reaction force caused by the vibration, and the vibration generated by the vibration generator cannot be sufficiently benefited.

In other words, the drive shaft side of the cam-type or link-type vibration excitation device is supported by the three-point link hitch, and the operating side that operates up and down is integrally connected to the work machine side, so that the downward movement of the work machine When the work equipment penetrates into the soil and receives a reaction force from the soil and starts pushing up the drive shaft side, the three-point link hitch, which is free to move upward, moves upward. Since it does not support this reaction force, it does not allow the work equipment to penetrate into the soil, so it is a method that cannot be used as an actual product.

From this, when the work machine is vibrated by the vibration excitation device, the direction of vibration movement is the latter.
A means is adopted in which the direction is longitudinal with respect to the traction direction of the tractor.

However, with this means of applying longitudinal vibration to the working machine, the longitudinal movement of the vibration generated by the vibration excitation device and imparted to the working machine can be compared to the connecting part between the working machine and the tractor by using vibration isolating material. Even if there is an intervention, the vibration is directly transmitted to the body of the tractor, and not only is there no effect of vibration isolation, but the reaction force when the work body moves forward in the direction of travel of the tractor is
By acting to pull the forward moving tractor backward, it benefits from reducing traction resistance by reducing cutting resistance, but it is not possible to perform the work smoothly with a small horsepower tractor that weighs around 20 horsepower. However, there is a problem in that it can only be used with large tractors with high horsepower, and there is also a problem in that the vibration is severe and the vibration transmitted to the tractor body is large, causing health problems for the operator. However, it is difficult to adapt it directly to a work machine for digging rhizomes.

[Objective] The present invention has been made to solve these problems that have arisen with the conventional means. By making the work equipment vibrate up and down using a vibrating device, it eliminates the reaction force that would pull the tractor body back and impede traction force, while also reducing the amount of force received from the soil when the work equipment moves downward. This effectively eliminates the problem of the three-point link hit that supports the work equipment moving upward due to reaction force, which obstructs the operation of lowering the work equipment so that it pierces into the soil. The purpose is to provide new means that will allow you to perform your work satisfactorily.

[Means for Solving the Problems] In the present invention, as a means for achieving this object, at the rear of the body of the tractor,
The mounting machine frame is mounted so that it can be raised and lowered via a three-point link hitch consisting of the left and right lower links connected to the top link and the lift arm, and
A work machine for excavating rhizomes is formed by installing shanks equipped with spatula-shaped guiding members extending rearward at the bottom of the machine frame in parallel on the left and right. The machine is suspended and supported so that it can reciprocate vertically, and a self-vibrating unbalancer set with the direction of vibration in the vertical direction is attached to the machine frame of the working machine. The present invention provides a working machine for digging rhizomes.

[Example] Next, an example of implementation will be described in detail with reference to the drawings.

FIG. 1 is a side view of a vibrating working machine for excavating rhizomes, in which the present invention can be carried out, installed on a tractor.
In the figure, 1 is a tractor, 2 is a mounting machine frame mounted on the rear of the machine body 10 of the tractor 1, 3 is a vibrating rhizome excavating work machine supported on the mounting machine frame 2, and 4 is its The vibration excitation device assembled to the working machine 3 is shown.

The tractor 1 is a normal four-wheeled tractor that runs by driving rear wheels 15, and is equipped with a lift arm 11 and a PTO shaft 12 at the rear of its body 10, and a top link 13 and a PTO shaft 12. A three-point link hitch type connection hitch consisting of left and right lower links 14, 14 (one is omitted in the drawing) is provided.

The mounting frame 2 is formed in the shape of an enclosing frame that can be passed forward and backward, and is mounted on the rear surface of the body 10 of the tractor 1 by a three-point link hitch consisting of the top link 13 and the lower link 14.
By operating a lift arm 11 connected by a connecting link 16, it is possible to freely move up and down.

The work machine 3 for digging rhizomes has a bracket 3a provided on the bottom side of a machine frame 30 formed in a square box shape.
3a, a shank 32 having a blade portion 32a on the front edge and a long spatula-shaped guiding member 31 on the lower end;
As shown in Fig. 2, the soil of the cultivation bed where the rhizomes are cultivated is provided at the front edge of each of the pair of shutters 32, 32. After cutting with the blade part 32a, the soil together with the rhizomes is held by a pair of long spatula-shaped guide members 31, 31 and raised rearward and upward, thereby digging up the rhizomes.

Then, the working machine 3 has its machine frame 30 arranged behind the mounting machine frame 2 mounted on the machine body 10 of the tractor 1 described above via a connecting hitch, and
Lower connecting members 50, 50 protruding forward from both left and right ends of the front side of the machine frame 30 and an upper connecting member 51 protruding forward from the top side of the machine frame 30, the front end sides of which are connected to the mounting machine frame 2. As a result, the lower connecting member 50 is attached to the mounting machine frame 2 and supported, but at this time, the base end (rear end side) of the lower connecting member 50 is attached to the machine frame 30 by the vertical connecting shaft 501 to the left and right. The upper connecting member 51 is rotatably connected, and the front end side is freely connected to the mounting machine frame 2 for horizontal and vertical rotation via a ball joint-shaped universal joint a. In this case, the shaft tube 510 and the shaft rod 511 which is slidably fitted into the inner cavity of the shaft tube 510 are formed to be extendable and retractable, and the shaft tube 51
0, springs 512 and 513 are inserted to buffer the movement of the shaft rod 511 in and out, and the shaft rod 511
The upper connecting member 51 is configured so that its movement in and out is performed under a constant spring load, and the proximal end and distal end sides of the upper connecting member 51 are connected to the machine frame 30 and the mounting machine frame 2 so that the axial direction is left and right. The direction of the connecting shafts 53, 5
4 and a hollow-shaped shaft hole that loosely fits into the shaft hole to allow rotation in the horizontal and vertical directions. As a result, the lower connecting member 50 rotates up and down about the connecting shaft 52, so that the machine frame 30 moves up and down with respect to the mounting machine frame 2, and during the vertical movement of the machine frame 30, The upper connecting member 51 is configured to expand and contract in length. Also, the left and right lower connecting members 50, 50
As shown in FIG. 4 and FIG.
An adjustment member 6 that expands and contracts by screws or hydraulic pressure is suspended so as to diagonally connect the space formed between the mounting machine frame 2 and the machine frame 30. By telescopically operating the machine frame 30, the left and right lower connecting members 50, 5
0 and the upper connecting member 51 are rotated left and right to be displaced left and right with respect to the mounting machine frame 2 while being suspended and supported thereon. The adjustment member 6 is mounted via a joint that can freely rotate up and down and left and right so that the adjustment member 6 does not interfere with the vertical movement of the machine frame 30 relative to the mounting machine frame 2 when the machine body 30 is displaced. Machine frame 2 and lower connecting member 50
It is connected to.

The vibration excitation device 4 is of an unbalancer type in which a weight w provided eccentrically on the rotating shaft 40 self-vibrates when rotated by the rotating shaft 40, and is formed in the box shape described above. As shown in FIGS. 6 to 9, within the machine frame 30, a pair of rotating shafts 40, 40 whose axial directions are in the front and rear directions are arranged in parallel on the left and right, and each of their front and rear shaft ends is arranged in parallel. are pivotally supported on the front and rear machine walls 30a, 30a of the machine frame 30, and eccentric weights w, w are attached to these rotating shafts 40, 40, respectively, and transmission gears G, G that mesh with each other are attached, respectively. , and the transmission gears G, G are engaged with each other in a state in which the weights w, w both hang down as shown in FIG. 7, and one of the pair of rotating shafts 40, 40 40 is formed into an input shaft 41 by protruding from the machine wall 30a on the front side of the machine frame 30, and this input shaft 41 is connected to the PTO shaft 12 installed on the rear surface of the body 10 of the tractor 1. By transmitting power through the universal joint shaft 42 and driving and rotating it from the tractor 1 side, the weights w and w provided on the pair of rotating shafts 40, 40 are rotated as shown in FIGS. 10 and 11. They are configured to rotate in opposite directions, canceling out the centrifugal force in the left and right directions, and to vibrate only in the up and down directions.

The embodiment device constructed in this manner operates as follows.

A tractor 1 with a work machine 3 for digging rhizomes mounted on the rear of the machine body 10 via a three-point hitch consisting of a top link 13 and lower links 14, 14 is used to dig rhizomes such as Japanese yam to be harvested. First, the tractor 1 is placed in a field where the tractor 1 is being cultivated, and the rear wheels 15, 15 of the tractor 1 are positioned so as to run between predetermined furrows. A pair of left and right shank 32, 32 and guide members 31, 31, which are displaced left and right and assembled to the machine frame 30 via brackets 3a, 3a, are positioned so as to correspond to the cultivation bed of the field.

Next, by operating the lift arm 11, the shank 32 and guide member 31 of the working machine 3 for digging rhizomes supported on the mounting machine frame 2 are placed in the soil at a predetermined position, as shown in FIG. It is in a state where it is supported at a height position that acts on the depth.

In this state, if the PTO shaft 12 is operated while the tractor 1 is driven forward by the drive of the rear wheels 15, the vibration excitation device 4 installed in the machine frame 30 of the work equipment 3 is operated, and the generate vibrations.

As a result, the machine frame 30 on which the vibration generating device 4 is assembled and supported begins to vibrate up and down. At this time, in the machine frame 30, the adjustment operation of the adjustment member 6 described above is completed and the length of the adjustment member 6 is fixed, so that the left and right lower connecting members 50, 50 cannot be rotated in the left and right direction. By being blocked, it is fixed at a position where it is displaced by a desired amount left and right as shown in FIGS. 4 and 5, and in that state position,
Only the vertical rotation around the universal joints a, a, which are the connecting points between the lower connecting members 50, 50 and the mounting machine frame 2, is allowed. Therefore, due to the operation of the vibration generating device 4, the shank 32 and the guide member, which are assembled and supported on the machine frame 30, vibrate to reciprocate up and down about the joint a, which is the connection point. 31 in the vertical direction to reduce their traction resistance.

Furthermore, since the direction of vibration is the vertical direction, it is possible to eliminate the problem that when the working machine is vibrated in the front-back direction, the reaction force of the vibration obstructs the traction force.

Therefore, as described above, the vibration generated by the vibration excitation device 4 that vibrates the shank 32 and the guiding member 31 of the working machine 3 is in the vertical direction. Since the machine frame 30 with the device 4 assembled is attached to the mounting machine frame 2 by the lower connecting member 50 that rotates up and down around the joint a, there is - It disappears due to the rotational movement of the machine frame 30 and the lower connecting members 50, 50 about the center a, and vibrations are no longer transmitted to the attached machine frame 2 side. As a result, transmission of vibrations generated by the vibration excitation device 4 to vibrate the working machine 3 to the body 10 of the tractor 1 is blocked at the joints a, a.

Then, the vibration device 4 causes the work machine 3 to
The vibration applied to the tractor 1 is caused by the movement of the left and right spatulas that move the rhizomes cultivated on the cultivation bed together with the soil and carry them backwards and upwards. Guiding member 31,
31 is vibrated up and down, even if the soil in the cultivation bed held together with the rhizomes is of highly viscous soil, the soil is moved through the guiding members 31, 3.
While carrying it to the rear end of 1, the soil is sieved off little by little, and as a result, when the rhizomes are released from the rear end of the guide members 31, 31, the soil that has already collapsed is removed. The vines should fall to the top and be lifted up from the soil of the cultivation bed.

[Effects of the Invention] As explained above, the vibrating working machine for digging rhizomes according to the present invention has a mounting machine frame 2 mounted on the rear part of a machine frame 10 of a tractor or the like via a three-point link hitch. A working machine 3 for digging rhizomes, which has a machine frame 30 equipped with shank 32, 32 equipped with a spatula-shaped guide member 31 and facing left and right in parallel, is reciprocated up and down. Since the self-vibrating unbalancer-type vibration excitation device 4 is assembled to the machine frame 30 of the working machine 3, which is suspended and supported in a moving state, the vibration movement direction is the vertical direction. When the work machine 3 is vibrated by the operation of the vibration excitation device 4, the vibration of the work machine 3 is in the vertical direction. The inhibiting problem is resolved, and the traction force can be efficiently reduced by vibrating the working machine 3.

The vibration of the working machine 3 is caused by the operation of the self-vibrating unbalancer-type vibration generating device 4 that is assembled to the machine frame 30 of the working machine 3. Since it is generated by the operation of alternately moving upward and downward while integrally connected to the frame 30 and the work equipment 3, in both cases of downward movement and upward movement, No reaction force acts on the mounting machine frame 2, and the machine frame 30, in which the work implement 3 and the vibration generator 4 are integrally assembled, only reciprocates up and down with respect to the mounting machine frame 2.
It is no longer necessary to move the three-point link hitch up and down, and while the work equipment 3 is supported via the three-point link hitch, the work equipment 3 vibrates up and down by the vibration device 4 without moving the three-point link hitch up and down. The traction force can be reduced without impairing the action of the working machine 3 on the soil.

Therefore, the working machine 3 is connected to the rear part of the body 10 of the tractor 1 via a three-point link hitch, and is vibrated up and down by the vibration excitation device 4 whose vibration direction is the vertical direction. Since the point link hitch does not move up and down due to the reaction force of the actuation of the vibrating device 4, the benefit of reducing the traction force caused by vibration can be effectively received, and even a small horsepower tractor can sufficiently remove rhizomes. excavation work will be possible.

[Brief explanation of drawings]

Fig. 1 is a side view of the embodiment of the device of the present invention, Fig. 2 is a rear view of the same, Fig. 3 is a rear view of the same working machine as shown in Fig. 3, with the working machine displaced in the left and right direction, and Fig. 4 is a plan view of the same. Figure 5 is an explanatory diagram showing the state in which the above working machine is displaced from side to side, Figure 6 is a partially broken plan view of the same vibration excitation device, and Figure 7 is a partially broken front view of the same above. , FIG. 8 is a longitudinal side view of the same as the above, FIG. 9 is a partially broken side view of the same as the above, and FIGS. 10 and 11 are explanatory diagrams of the action of the above. Explanation of drawing symbols, G...conduction gear, a...joint, w...weight, 1...tractor, 10...
Aircraft, 11... Lift arm, 12... PTO axis,
13... Top link, 14... Lower link, 1
5...Rear wheel, 16...Connection link, 2...Mounting machine frame, 20, 21...Arm, 3...Work machine, 3a
... Bracket, 30 ... Machine frame, 30a ... Machine wall, 31 ... Guidance member, 32 ... Shank, 32
a... Blade portion, 4... Vibration device, 40... Rotating shaft,
41...Input shaft, 42...Universal joint shaft, 50...Lower connecting member, 51...Upper connecting member, 52, 53, 54...Connecting shaft, 510...
Shaft tube, 511...Shaft rod, 512, 513...Spring, 60...Adjustment member.

Claims (1)

[Claims] 1 Attach the machine frame 2 to the rear of the machine body 10 of the tractor 1.
is mounted so that it can be raised and lowered freely via a three-point link hitch consisting of left and right lower links 14, 14 connected to the top link 13 and the lift arm 11. A shank 3 provided with a spatula-shaped guiding member 31 extending toward the
The working machine 3 for digging rhizomes is formed by installing the working machine 2 and 32 in parallel facing each other on the left and right sides.
The machine frame 30 of the working machine 3 is suspended and supported so that it can reciprocate up and down, and an unbalancer type vibration excitation device 4 that self-vibrates with the direction of vibration in the vertical direction is attached to the machine frame 30 of the work machine 3. A vibrating working machine for excavating rhizomes.