JP2001145401A - Colter buffer device in root vegetable harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a colter buffer device in a root vegetable harvester, capable of being displaced in the upper and lower direction while keeping the front and rear direction of the colter, and having shock-absorbing performance. SOLUTION: This buffer device is the one of a colter installed in the vicinity of the tip of a digging-up shovel in the root vegetable harvester, and capable of cutting the residue in a field according to the travel of the harvester. The tip side of a link is pivotally attached to a center shaft of the colter, and the tip of a downward frame integrally formed with an undercarriage is also pivotally attached to the intermediate part of the link at the rear part of the center shaft of the colter. The rear end side of the link and the frame side of the undercarriage are connected with a spring to support the colter at a prescribed cutting operation position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a buffering device for a dug coulter in a root vegetable harvester such as a beet harvester, and more particularly to a coulter mounting structure having a buffering function for obstacles.

[0002]

2. Description of the Related Art A root vegetable harvesting machine such as a beet harvester excavates root vegetables with a shovel member provided below a chassis while traveling, transfers the root vegetables to a rod conveyor, and lifts the root vegetables to a hopper on the chassis. This type of harvester cuts residues such as foliage scattered on the ground surface while running to prevent adhesion to the rear conveyor frame and cuts the soil on the left and right of root vegetables to make it easier to dig On both sides near the tip of the excavator, a disc-shaped excavator is provided in parallel in the traveling direction. Also,
The coulter is installed close to the tip of the shovel so that the excavated root vegetables are supported on both sides and delivered to the conveyor.

[0003]

As shown in FIG. 5, the conventional coulter has a structure in which it is directly rotatably fixed to a support arm integrated with the undercarriage of the harvester and cannot move up and down. On the other hand, since obstacles such as rubble and the like are mixed in the field, the coulter collides with the obstacles while the harvester is advancing and receives a strong impact force, resulting in frequent deformation and destruction accidents.

In order to prevent this, there has been developed a type in which a support frame of a coulter is rotatably supported so as to be able to swing against a spring. , The coulter is largely displaced back and forth with vertical movement, and the following inconvenience occurs. In other words, the coulter is used to cut residue such as leaf stems and to transfer the excavated root vegetables to the rear conveyor without spilling to the side, so it is necessary to provide them close to the excavator and conveyor. However, in the above-described mounting structure in which the support frame of the coulter swings, the coulter hits a rear member such as the conveyor frame when the coulter collides with an obstacle in the ground and turns rearward, thereby causing an obstacle.

Accordingly, an object of the present invention is to provide a coulter shock absorber having a function of absorbing a shock by vertically displacing the coulter without moving it back and forth.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a digging method which is installed near the tip of a digging shovel of a root vegetable harvester and cuts residue from a field as the harvester runs. In the damper of the coulter, the distal end side of the link is pivotally attached to the central axis of the coulter, and the distal end of the downward frame integrated with the chassis is axially attached to the middle of the link behind the central axis of the coulter. The rear end side and the chassis frame side are connected by a spring to support the coulter at a predetermined cutting operation position.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a side view showing the entire configuration of a root vegetable harvesting machine 1 such as a beet harvester. In this root vegetable harvesting machine 1, a hopper 4 is mounted on a chassis 3 having wheels 2 and a towing arm 5 at the front of the vehicle body is connected to a three-point link (not shown) of a towing vehicle such as a tractor, and an arrow is drawn by the towing vehicle. It is configured to be pulled in the a direction.

A conveyor frame 7 having an endless rod conveyor 6 rotatably suspended therefrom is provided below the undercarriage 3 at an upward slope toward the rear, and a shovel member for excavating a beat at the end of the conveyor frame 7. 8 is fixed in a downwardly inclined shape with its tip facing the ground in the traveling direction.

[0009] Thus, the root cropper 1 is a shovel member 8.
The root vegetables are driven in the direction of arrow a while excavating the root vegetables, and the excavated root vegetables are sent to the hopper 4 of the undercarriage 3 by the rod conveyor 6. The residue of digging up and getting caught in the rear conveyor member during running causes trouble. For this purpose, a coulter 9 for cutting the residue is provided in front of the shovel member 8.

The coulter 9 comprises a disk-shaped rotary blade having a cutting edge on a peripheral edge. The rotary blade is directed downward in parallel with the chassis 3 so as to be parallel to the traveling direction and perpendicular to the ground. It is attached to the frame 10, and is configured to cut into a residue by rotating in the direction of arrow b during traveling and penetrating into the ground. Also,
In addition to the cutting function of the residue, the coulter 9 cuts the soil on the left and right of the root vegetables to facilitate excavation, and closes to the shovel member 8 to prevent the excavated root vegetables from rolling to the side. It is arranged on both the left and right sides.

Since there are cases where obstacles such as rocks are mixed in the field, the above-mentioned coulter 9 needs a means for buffering the obstacle when it collides with the obstacle. Since the cushioning means is arranged close to the frame 8, it is necessary for the shock absorbing means to escape upward while maintaining the front and rear positions of the coulter 9 in the event of a collision.

For this reason, the coulter mounting structure of the present invention
As shown in FIG. 2, the distal end side of the link 12 is pivotally mounted on the central axis 11 of the excavating coulter 9, and the intermediate between the downward supporting frame 10 fixed to the chassis 3 and the link 12 is the central axis 11 of the coulter 9. The rear end of the link 12 and the chassis 3 are connected via a spring 13 to support the coulter 9 at a normal position (cutting position). Since the spring 14 supports the link 12 with a spring force that does not extend with the normal cutting resistance of the coulter 9, when the harvester 1 advances forward (arrow) in this state, the coulter 9 cuts into the soil while rotating, and leaves and foliage. Proceed while cutting.

The link 12 is preferably, as shown in FIG.
When the coulter 9 is in the normal position (cutting position), the coulter 9 is supported by the spring 13 at an inclination angle slightly upward to the right with respect to the horizontal line.

As described above, since the coulter 9 is rotatably supported by the downward supporting frame 10 on the side of the chassis 3 behind the center shaft 11 through the link 12, as shown in FIG. When it strikes an underground obstacle and receives a strong shock, it pivots upward against the spring 13 with the link 9 and the shaft attachment 14 of the downward supporting frame 10 as a fulcrum, and absorbs the shock. In this case, the coulter 9 rotates in the direction of the arrow c with the frame shaft attachment portion 15 of the link 12 and the coulter center axis 11 as radii, but the link 12 is normally disposed rearward and inclined upward to the right. When a shock is applied, the coulter 9 itself moves upward without substantially changing its front-rear position.

In the embodiment shown in FIG.
The bracket 15 is integrally formed from above to above, and the upper end of the spring 13 is locked to the tip of the bracket 15, but the upper end of the bracket 15 may be locked to another member on the chassis 3 side.

The downward supporting frame 10 may be a member integrated with the chassis 3 or a separate member fixed to a member on the chassis 3 side. Further, the coulter 9 and the support frame 1
0, the link 12, and the spring 13 may be separately mounted at predetermined positions as parts separated from each other. However, the bracket 15, the bracket 15, the spring 13, and the coulter are integrally connected to the downward supporting frame 10. 9. The link 12 may be formed in an assembly (assembly) that is previously joined in a predetermined positional relationship.

The spring 13 has a predetermined spring force.
Alternatively, as shown in FIG. 4, two springs having relatively low spring force may be used to secure a predetermined spring force.

[0018]

According to the present invention, when the coulter is configured as described above, when the coulter collides with an obstacle, the coulter can be moved upward while maintaining the front and rear positions of the coulter to absorb the impact. . Accordingly, it is possible to prevent deformation and breakage of the coulter due to obstacles, and there is no possibility that the coulter will collide with and interfere with a rear member during shock absorption. Furthermore, since the coulter can be arranged close to the rear member, the excavated root vegetables do not fall off from the side.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing a side view of a root vegetable harvester.

FIG. 2 is an enlarged configuration diagram of a coulter mounting structure according to the present invention in a normal state.

FIG. 3 is an enlarged configuration diagram at the time of impact of the coulter mounting structure according to the present invention.

FIG. 4 is a rear view of the coulter.

FIG. 5 is a conventional coulter mounting structure diagram.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Root vegetable harvester 2 ... Wheel 3 ... Carriage 4 ... Hopper 5 ... Traction arm 6 ... Rod conveyor 7 ... Conveyor frame 8 ... Excavator member 9 ... Coulter 10 ... Support frame 11 ... Colter center axis 12 ... Link 13 ... Spring 14 ... Frame shaft attachment part 15: Bracket

[Reference number] PAS99023

Claims (1)

[Claims] 1. A buffering device for a digging coulter, which is installed near the tip of a digging excavator of a root crop harvesting machine and cuts residue in a field as the harvesting machine travels, wherein a tip end side of a link is pivoted around a central axis of the coulter. At the same time, the front end of the downward frame integrated with the chassis is attached to the middle of the link behind the center axis of the coulter, and the rear end of the link and the chassis frame are connected by a spring to connect the coulter to a predetermined position. Coulter shock absorber for root crop harvesting machine, which is supported at a cutting work position