JPH052015Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention is a double rotary tiller, in which a rake is vertically installed between the rotary section and the rear rotary section, and a rake is installed at the rear of the rear rotary section. The present invention relates to a rake device that includes rake bodies whose parallel spacing is variable.

(b) Prior art In a rotary tiller, the rake device, which is vertically installed behind the rotation area of the tiller claws, is divided into upper and lower stages, one rake is fixedly mounted on the rotary cover, and the other rake is fixedly mounted on the rotary cover. A device is known in which the parallel spacing of the rakes in the entire device can be adjusted by adjusting the position of the rake that moves left and right by fixing the rakes in the left and right directions (for example,
-Refer to Publication No. 103804).

(c) Problems to be solved by the invention By the way, in this type of conventional device, the mounting plate of the upper rake is fixed to the rotary cover by welding, etc., while the mounting plate of the lower rake is attached to the mounting plate in the left-right direction. Since they were designed to be movably stacked and fixed in place with bolts, it was possible to adjust the parallel spacing of the rakes by moving the lower rake from side to side, but the longitudinal spacing between the upper and lower rakes could be changed. However, there was a problem in that it was not possible to easily deal with cases where the front and rear spacing between both rakes was inappropriate, or cases where deformation due to external force became inappropriate.

In addition, the upper rake and the lower rake were formed with almost the same hanging length, and the parallel spacing was the same from the top of the rake to the hanging tip in the longitudinal direction of the rake. Another problem was that it was difficult to achieve a plowing condition that was uniform throughout the length and became finer as it approached the surface layer.

The present invention was developed in view of these difficulties, and its purpose is to not only adjust the parallel spacing of the entire rake using two separate rakes, but also to adjust the longitudinal spacing between both rakes. To provide a rake device for a rotary tiller which can finish a tilled soil layer so that the lower layer is rough and the soil particles become finer toward the surface layer.

(d) Means for Solving the Problems In other words, the rake device according to the present invention has a rake 23 between the tip rotation trajectory 6 of the tilling pawl of the front rotary section 1 and the tip rotation trajectory 20 of the tilling pawl of the rear rotary section 2. is installed vertically, and the rear rotary part 2
A rake rod group A2 is fixed at a predetermined position on the tiller frame behind the tip rotation trajectory 20 of the tiller claw, and a rake rod group A is installed to be movable laterally with respect to the rake rod group A2.
1, in which a laterally movable rake rod group A1 of the rake body A is provided with a rake rod group A1;
The rake rod group A1 is attached to a shaft body 25 which is located at a different location from the fixing point of No. 2 and is pivotally supported in a horizontally movable manner on the tiller frame, and the hanging length of the rake rod group A1 is made longer than that of the other rake rod group A2. It is characterized by this.

(E) Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

The front rotary section 1 of a double rotary tiller is constructed by attaching a tilling section cover 3 consisting of a side frame, an upper cover, etc. to a lateral main beam 2 to form a tilling section frame, and a horizontal lateral main beam 2 in the front rotary tiller. The first rotary claw shaft 4 is supported by a side drive type transmission case 5 and is forcibly rotated, and the outer periphery is provided with a large number of rotation loci 6 at the tip. Claws 7 are arranged in an array.

A gearbox 8 that receives power from a PTO shaft (not shown) of the tractor is provided at the center of the main beam 2 in the lateral direction, and a drive shaft 9 extending laterally is connected to the input section of the transmission case 5. It is linked and linked.

The tilling section frame of the front rotary section 1 is provided with a connecting section 10 that connects to a three-point hitch of the tractor body, and the connecting section 10 extends rearward and is also connected to a vertical adjustment mechanism 11. A rear frame 12 is provided that can change and adjust the vertical relative angle between the rear frame 12 and the tiller frame.

The rear rotary section 13 connects the left and right side frames with a main beam 14, covers the upper part to form a tilling section cover 15, and connects this to the tilling section frame of the front rotary section through a connecting section 16. It is configured as follows.

Then, a second
A rotary claw shaft 17 is horizontally mounted so that the shaft 17 can be forcibly driven by a transmission mechanism 18.

Further, the tilling pawl 19 disposed on the second rotary pawl shaft 17 is installed as a tilling pawl whose tip rotation locus 20 has an appropriately smaller diameter with respect to the tilling pawl 7 in the front rotary part 1, and is rotated in a down-cut manner. The tilling claws 19 of the rear rotary part are designed to rotate more strongly than the tilling claws 7 of the front rotary part, and are configured to crush a part of the tilled soil that the tilling claws 7 have tilled.

Furthermore, the tilling section cover 15 of the rear rotary section 13
A rear cover 21 is attached to the rear end so as to be able to swing up and down, and this rear cover 21 and the rear frame 1
2 are connected by a hanger rod 22, and the operation of the hanger rod 22 causes the rear cover to automatically move up and down within a predetermined range.

When the rear rotary part 13 is connected and equipped to the front rotary part 1, the tilling claw 19 is located at the rear part a predetermined distance from the tip rotation locus 6 of the tilling claw 7 located at the front. However, a rake 23 is installed between the tip rotation trajectory 6 of the tilling claw in the front rotary section 13 and the tip rotation trajectory 20 of the tilling claw in the rear rotary section 13, and A part of the tilled soil that is thrown up passes through the rake 23 and reaches the area of action of the tilling claws of the rear rotary section 13. rear cover 21
A rake body A is installed between the two.

The rake body A is composed of two sets of rake rod groups A1 and A2 arranged in parallel in the front and rear.

The rake rod group A2 located at the rear is configured by arranging a plurality of rake rods 27 in parallel at a predetermined interval in the longitudinal direction of the mounting part 28, and by fixing the mounting part 28 to the tilling part cover 15. and fixedly mounted in a predetermined position.

On the other hand, the rake rod group A1 located at the front is composed of a plurality of rake rods 27 fixed in parallel at predetermined intervals in the longitudinal direction of the cylinder, and the cylinder is inserted into the shaft body 25 and fastened with a fastener. The shaft body 25 is pivoted on support parts 24, 24 provided on the tillage section cover 15 at a location different from the fixed position of the rear rake rod group A2, and is fixed in the lateral direction. It can be moved and fixed at any desired position.

In addition, each rake rod of the front rake rod group A1 is suspended approximately along the outer side of the tip rotation trajectory 20 of the tiller claw 19, and each rake rod of the rear rake rod group A2 is
It is located along the front rake rod group while being slightly further away from the front rake rod group, and the drooping length of the front rake rod group A1 is longer than that of the rear rake rod group A.
It is formed longer than the hanging length of 2.

(f) Function During tilling work, the tilling claws 7 of the front rotary section 17 till the field to a predetermined depth, and cause the soil clods to bounce backward and collide with the rake 23.

Of the soil clods that collide with the rake 23, those that do not pass through the rake gap and those that are not thrown backwards do not reach the rear rotary part 13 and fall faster as they are larger, that is, they fall to the lower layer of the plowing part.

In addition, the earth clod passing through the rake 23 and the rake 2
The clod of soil thrown out backwards passing under 3 is further crushed by the tilling claws 19 of the rear rotary part 13, collides with the rake body A, and is crushed, and has already fallen as described above. It falls on top of the coarse earth clod (upper layer).

By adjusting the spacing of the rake body A as shown in FIGS. 3 and 4, the size of the clod passing through changes, and if the spacing between the rake rods becomes coarse (3. When the spacing between the rake rods is closer (Fig. 4), the soil is more finely ground than in the case shown in Fig. 4. Because it is longer than that of group A2, the upper part in the longitudinal direction of rake body A becomes the rake interval set by the front and rear rake rod groups, whereas the lower part in the longitudinal direction of rake body A In this part, the rake spacing is coarse due to only the front rake rod group, so the crushed soil that falls to the upper layer is not uniform, and the lower layer is rough and the surface layer is fine. Therefore, in the entire plowed soil layer, the soil clods are larger in the lower layer, and become finer in the surface layer.

(g) Effects of the invention The rake device of the rotary tiller according to the present invention has a rotation trajectory 6 at the tip of the tiller claw of the front rotary section 1.
and the tip rotation locus 20 of the tilling claw of the rear rotary section 2
A rake 23 is vertically installed between the rake rod group A2, which is fixed at a predetermined position on the tiller frame behind the tip rotation locus 20 of the tiller claw of the rear rotary section 2; In a double rotary cultivator configured by providing a rake body A including a rake rod group A1 which is equipped to be laterally movable, the rake rod group A1 which is laterally movable among the rake body A is equipped with a rake rod group A1. The rake rod group A1 is attached to a shaft body 25 which is located at a different location from the fixing point of A2 and is pivotally supported in a horizontally movable manner on the tiller frame, and the hanging length of the rake rod group A1 is made longer than that of the other A2. Therefore, not only can the horizontal spacing of the rake rods in rake body A be adjusted, but also the longitudinal spacing between both groups of rake rods can be maintained appropriately. This is done not uniformly in the entire direction, but in a way that the lower part is rougher and the surface layer is finer, and this is due to the preliminary falling effect of the coarse soil clods by the rake 23 installed vertically between the front rotary part 1 and the rear rotary part 2. It has become possible to finish the entire plowed soil layer into a state in which the soil clods are larger in the lower layers and finer in the surface layers.

[Brief explanation of drawings]

Figure 1 is a cross-sectional side view of a dual rotary tiller implementing the device of the present invention, Figure 2 is an enlarged view of a portion of Figure 1, and Figure 3 is a view of the main parts of Figure 2 from the direction of arrow A. Enlarged view, FIG. 4 is an enlarged view showing the adjusted state of the main part of FIG. 3. DESCRIPTION OF SYMBOLS 1... Front rotary part, 2... Rear rotary part, 6... Rotation trajectory of the tip of the tilling claw of the front rotary part, 20... Rotation trajectory of the tip of the tilling claw of the rear rotary part, 23... Rake, 25... Shaft body, A... rake body, A1... fixed rake rod group, A2... rake rod group.

Claims (1)

[Scope of utility model registration request] A rake 23 is vertically disposed between the tip rotation locus 6 of the tilling claw of the front rotary section 1 and the tip rotation locus 20 of the tilling claw of the rear rotary section 2. Behind me,
Rake rod group A2 fixed to a predetermined position on the tiller frame
and a rake rod group A1 that is movable laterally relative to the rake body A, in which the rake rod group A1 of the rake body A is laterally movable is attached to a shaft body 25 which is located at a different part from the fixed part of the rake rod group A2 and is pivoted to the tiller frame so as to be able to move laterally,
A rake device for a rotary tiller, in which the hanging length of the rake rod group A1 is longer than that of the other rake rod group A2.