JPS622988Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a grass cutting device that is attached to a tractor or the like.

(b) Conventional technology In other words, conventional grass cutting equipment attached to tractors, etc. is almost fixed to the tractor, or is only partially rotatable. As in Publication -33032, the width of the machine was increased by extending from the main machine side to one side.

(c) Problems that the invention aims to solve: When used for mowing work under trees in orchards, etc., mowing remains at the base of the tree, or how many times does it take to cut grass close to the base of the tree? In consideration of the need to change direction or reciprocate, the device of the present invention provides that when the mowing device approaches or comes into contact with the base of the plant, the mowing part rotates and moves back and forth. By sliding in the direction away from the tree, mowing work can be continued while removing interference between the cutting part and the base of the plant, making it possible to efficiently mow grass around the base of the plant under the tree with the back and forth stroke of the tractor. It was devised to do so. In addition, since it is mounted in front or behind a tractor or the like so that the width is not larger than the width of the machine, it is possible to work efficiently even when turning or under a shelf.

(d) Means for solving the problem The reaping section equipped with the cutting blade is suspended so as to be movable up and down by a link such as a tractor, and the reaping section can be slid in the width direction and freely rotated in plan view. This is because the structure is as follows.

(E) Action When the cutting part of the grass cutting device approaches or comes into contact with the base of a tree, etc., the cutting part slides and rotates in the direction away from the base of the plant, thereby avoiding interference between the base of the plant and the cutting attachment. In addition, if the reaping section is returned to its original position immediately after passing the base of the plant, mowing work can be carried out efficiently without leaving the area around the base of the plant uncut.

(F) Embodiments Hereinafter, explanations will be given based on drawings of embodiments of the device of the present invention. In FIGS. 1 and 2, A is a tractor, and the frame 2 of the mowing device B is suspended from the links 1 of the tractor A, and the frame 2 is the tractor A.
The bevel case 4 is interlocked with the PTO shaft 3 of
Center the fixed cylinders 5 and 6 on the left and right,
A slide lever 7 with a built-in slide device (not shown) is provided at the base of the fixed tube 5 on one side, and the sliding lever 9 of the reaping section 8 is slid at the tip along with the tip of the fixed tube 6 on the other side. Support that supports freely 10, 10
It will be fixed. Furthermore, a sliding drive shaft 11 interlockingly connected to the inside of the bevel case 4 is connected from the tip of the fixed cylinder 6.
is connected to one side of the transmission case 12, and an output shaft 13 projects from the other side of the transmission case 12 and is guided to the power case 14 of the reaping section 8. From the power case 14, the output shaft 13 is connected to one of the transmission cases 12. The rotating shaft 16 of the cutting blades 15, 15, 15 installed on the back of the blade 8,
Bevel box 1 to drive 16, 16.
7 and 17 and transmission shafts 18 and 18. The sliding rod 9 is protruded from the middle of the transmission case 12, and substantially both ends of the sliding rod 9 are supported by the supports 10, 10 at the tips of the fixed cylinders 5, 6, and the intermediate portion is reaped. Frame 19,1 of part 8
9, and as shown in FIG. The power case 14 is fixedly installed at the lower side of the frame 19, and as shown in FIG. Stable rod 2
3,23 are arranged. The power case 14 is the second
As shown in the figure, it is divided into upper and lower parts, and has a structure in which the reaping part 8 is suspended and can be freely rotated, so that power can be transmitted. Movement of the reaping section 8 in the left-right direction is controlled by rotating the slide lever 7 in the left-right direction and pivoting a sensor arm 24 formed in a curved shape protruding from one side of the reaping section 8.
The movement of the sensor arm 24 is linked to the slide lever 7 by a wire 26, and a pressure spring 27 and a tension spring 28 are used to return the slide lever 7 and the sensor arm 24 to a neutral state when they are not activated. Further, horizontal rotation of the reaping section 8 is achieved by keeping the tension between the reaping section 8 and the stabilizing rod 23 in a constant tension state with a tension spring 29, and fixing it with a stopper 30. In addition, 31 in the figure indicates the stock origin of the tree.

When this mowing device B is attached to tractor A and begins mowing undergrowth in an orchard, etc. in the state shown by the solid line in Fig. 1, the progress of tractor A and the PTO
The power from the shaft 3 enters the mowing device B, passes through the bevel case 4, and is transferred to the sliding drive shaft 11,
Drives the rotating shafts 16, 16, 16 via the transmission case 12, output shaft 13, power case 14 transmission shafts 18, 18, bevel boxes 17, 17, etc.,
Mowing work can be done by rotating the cutting blades 15, 15, 15. At this time, the mowing height of the grass may be determined by adjusting the distance between the mowing section 8 of the mowing device B and the ground by vertically adjusting the links 1 of the tractor A. Next, when the base 31 of the tree being worked approaches as shown by the imaginary line in FIG. 1, the operator of tractor A may rotate the slide lever 7 in the direction of arrow A; When the sensor arm 24 protruding from the side of the reaping section 8 contacts and rotates the sensor arm 24 in the direction of arrow B, the slide lever 7 is rotated in the direction of arrow A via the wire 26. As a result, the slide device built in the slide lever 7 is activated, and the slide device pushes out the sliding drive shaft 11 in the direction of arrow C, and at the same time, the transmission case 12 connected thereto, the sliding drive shaft 11 is pushed out in the direction of arrow C. Move rod 9 in the same direction,
Cylindrical body 20 and frame 1 fixed to sliding rod 9
9 to slide the suspended power case 14 and the reaping section 8, and the reaping section 8 rotates relative to the frame 19 to avoid the base 31 of the tree without cutting off the power. Then, the reaping work can be continued by approaching the stock head 31. In this way, interference between the reaping part 8 and the stock head 31 is avoided, and when the sensor arm 24 returns to its original position together with the slide idle lever 7 by the force of the tension spring 28 and the pressing spring 27, the action of the slide device is stopped. Reaping section 8
stops moving. As tractor A moves forward,
Since the reaping part 8 needs to be returned to its original reaping position,
When the slide lever 7 is rotated in the opposite direction of the arrow A, the slide device is activated again.
The reaping section 8 may be moved in the opposite direction of the arrow and automatically stopped at the maximum movement position, or it may be stopped when the slide lever 7 is released and the work may be continued.

However, the reality of the work is that if the reaping section 8 moves too much in the direction of arrow C or the opposite direction, the return time will also become longer. Therefore, as shown in FIG. 3, the cutting part 8 rotates around the transmission case 14 as shown in the imaginary line with its side end in contact with the stock base 31, and at the same time, the sensor arm 24 While sliding the reaping part 8, avoid interference between the reaping part 8 and the stock head 31, and at the same time pass the stock head 31, the tension spring 2 between the reaping part 8 and the stabilizing rod 23
The reaping force 9 can be used to rotate the reaping part 8 to the original position, and the slide lever 7 can be operated to return the reaping part 8 by the amount of movement.

As shown in Figure 4, this kind of work and operation is carried out by stock number 3.
Align the working end of the reaping section 8 with the center line of 1 and 31, and carry out the work while moving the tractor A forward in the direction of the arrow 2.The same goes for the return trip of the tractor A, that is, the forward work in the direction of the arrow H. When the reaping section 8 is aligned with the center line of the stock heads 31, 31, during the reciprocating process of the tractor A, the stock heads 31, 31,
31 mowing work can be carried out without leaving anything, including the outer periphery.

Further, the rear part of the tractor A etc. is provided with a link 1 etc. so that it can swing up and down so as not to take up a width larger than the machine width of the tractor A etc.

(g) Effects As explained above, the device of the present invention has the advantage that the cutting blade 1
A reaping section 8 housing and equipped with a reaping section 5 is attached to a frame 2 which is suspended from a link 1 of a tractor A or the like and is interlockingly connected to a PTO shaft 3, so as to freely transmit power. Reaping device B configured such that 8 is slidable and rotatable with respect to the frame 2
Therefore, when the reaping part 8 of the mowing device B approaches or comes into contact with the stock base 31 of a tree or the like, the reaping part 8 slides and rotates in the direction away from the stock base 31, and the stock base 3
1 and the reaping part 8 can be avoided, and if the reaping part 8 is returned to its original position immediately after the reaping part 8 passes the stock head 31, the reaping can be done without leaving the area around the stock head 31 uncut. Work can be done, tractor A stock 3
Grass mowing work can be carried out efficiently by the back and forth process between 1. You can work efficiently even in places with narrow aisles, and by preventing interference between the cutting section and the base of the plant, you can always work with peace of mind without straining the cutting section and preventing damage to trees, etc. do not have. Next, since the reaping section 8 is attached to the rear of the tractor A so that it can move up and down by the link 1, after the reaping section 8 has moved to avoid the stock head 31, it can be returned to its original position. The operation, that is, the rotation operation of the slide lever 7 can be performed by raising the link 1 while the operator is riding on the tractor A, and facing backward at that position. Therefore, there is no need to take the trouble to get off the tractor A to perform this return operation.

Further, the commands from the sensor arm 24 actuate only the avoidance operation by sliding the stock head 31 of the reaping section 8 in the width direction or rotating it in the plane, and the return operation to return to the original position is performed manually. Therefore, these mechanisms of the reaping section 8 can be made very simply, and the situation where the reaping section 8 hits an obstacle such as the stock head 31 and is damaged can be avoided with a very low cost mechanism.

[Brief explanation of the drawing]

FIG. 1 is a top view of the main parts of the mowing device B, which is the device of the present invention, attached to the tractor A, showing a partially operating state;
Figure 2 is a partially cutaway view H of Figure 1, Figure 3 is a diagram of the state in which the reaping unit 8 is rotated in the state of Figure 1, and Figure 4 is a diagram of the state shown in the solid line in Figure 1 in the field. It is a simplified diagram of the work situation. A...Tractor, 1...Link, 5...Mower blade,
7...Slide lever, 8...Reaping section, 24...
Sensor arm, 31...Stock base, 15...Kariblade.

Claims (1)

[Scope of utility model registration request] A reaping section 8 equipped with a reaping blade 5 at the rear of a tractor A, etc.
In a grass mowing device that is attached to a tractor or the like, the mowing section 8 is suspended by a link 1 so as to be movable up and down, and the mowing section 8 is configured to be slidable in the width direction and rotatable in a plan view. A sensor arm 24 that is linked to the slide lever 7 that commands the slide of the reaping section 8 is attached to the side edge, and when the sensor arm 24 comes into contact with an obstacle such as the stock base 31, it is moved in the direction of avoiding the obstacle. A grass cutting device mounted on a tractor or the like, characterized in that the cutting section 8 slides and rotates in plan view.