JPH0459841B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a disc plow type tilling device that is used by being attached to a tractor.

<Prior Art> A disc plow type tilling device is used by being attached to the rear of a tractor. This type of tillage device consists of disc plows with a plurality of discs installed on a disc shaft, which are arranged on the left and right in a V-shape in plan view, and each disc plow is forced by power from a tractor. I'm trying to drive it. In addition, a rotary tiller for opening the mouth is installed at a slightly forward position between the left and right disc plows, and the claw shaft of this rotary tiller is driven in the up-cut direction to open the mouth. I try to do this.

<Problems to be Solved by the Invention> However, in the conventional tilling device, the claw shaft of the rotary tiller was installed perpendicular to the direction of travel.
Despite the use of outward-facing claws, there was a drawback in that tilled soil clods, waste straw on the surface of the field, etc. were scattered forward toward the tractor. In addition, although the waste straw was thrown forward by the claw, it was still on its path and could not be removed to the side, so there was a problem that it would eventually become entangled with the claw or wrap around the claw shaft. In addition, in the past, the central part of the ridge was simply tilled using a rotary tiller, and a disk plow was used to collect soil from the left and right on the plowing site, which sometimes caused the central part of the ridge to become too high. Since the gravel plowed by the disc plow would sit on top of the soil that had expanded and softened due to rotary plowing, there was a risk that the reversibility of the gravel would deteriorate on the center side.

<Means for Solving the Problems> In view of these conventional problems, the present invention actively scatters tilled soil clods, waste straw, etc. forward and outward, and prevents the waste straw, etc., from moving toward the tractor side. It was provided for the purpose of preventing scattering and wrapping around the rotary plowing part, as well as improving the reversibility of gravel and the effect of ridge shaping. Disc plows each having a disk provided thereon are arranged on the left and right in a V-shape in plan view, and between these left and right disc plows,
In the tilling device, the disc plow is forcibly driven by power from a tractor, and the disc plow is forcibly driven by power from a tractor. A pair of shafts are provided on the left and right so that the shafts are substantially parallel to the disc shaft of the disc plow and have a V-shape in plan view, and the claw shaft is disposed separately from the disc shaft in front of the disc shaft, and ,
The tilling claws provided on the inner end sides of the pair of left and right claw shafts are arranged so as to overlap with each other in the left-right direction.

<Effects of the Invention> According to the present invention, the mouth-opening rotary plowing part having outwardly directed claws and rotating in the up-cutting direction is provided with the claw axis substantially parallel to the disc axis of the disc plow and having a V-shape in plan view. Since a pair is provided on the left and right so that the outward claws rotate, tilled soil clods and waste straw on the surface of the field can be actively thrown away in the front and outside directions in the direction of travel. Therefore, the waste straw and the like are not blown forward toward the tractor as in the conventional case, and the waste straw and the like are removed outwardly, so that it is possible to prevent the waste straw from becoming entangled. In addition, the rotary tiller blows the tilled soil in an anterolateral direction, so it has a good opening effect on the tillage mark, which improves the reversibility of the gravel by the disc plow, and also allows the gravel to be moved from the left and right to the center. The central part does not bulge particularly high, and the ridge shaping effect is good.

In addition, since the claw shaft is disposed further forward than the disc shaft, when the tilling claws blow the soil outward, it does not hit the disc plow, resulting in good splashing performance. Furthermore, since the tilling claws at the inner end overlap in the left-right direction, there is no leftover tillage in the tilling section, and the opening effect is improved.

<Example> The present invention will be described in detail below with reference to the illustrated example. In FIGS. 1 and 2, 1 is a tractor;
2 is the rear wheel, and 3 is the PTO shaft. Reference numeral 4 denotes a hydraulic system, which has a pair of left and right lift arms 5. Reference numeral 6 denotes a tilling device, which is attached to the rear of the tractor 1 to be pulled up and down via a three-point linkage mechanism 9 consisting of a top link 7 and a pair of left and right lower links 8. The tilling device 6 includes a machine frame 10, a pair of left and right disc plows 11, and a pair of left and right rotary tillers 1 for opening the plow.
2. The machine frame 10 includes an input gear case 13 in the center, support tubes 14 provided on both sides of the gear case 13, and a V-shape in plan view that extends backward from each outer end of the support tubes 14. and a transmission case 16 extending downward from the outer end of each of the projecting cylinders 15,
Further, each projecting tube 15 is reinforced with a link 17. Each disc plow 11 consists of a disc shaft 19 rotatably supported between a transmission case 16 and a gear case 18 on the inner end side, and a plurality of discs 20 fixed to this at equal intervals. The left and right disc plows 11 are arranged in a V-shape when viewed from above. The input gear case 13 has an input shaft 22 so as to input the motion from the PTO shaft 3 of the tractor 1 via the universal joint shaft 21 as shown in FIG.
A bevel gear mechanism 23 is provided, and the bevel gear mechanism 23 is connected to each disk plow 11 from the support tube 14, the transmission shaft 24 in the projecting tube 15, the universal joint 25, and the transmission shaft 26 via the winding transmission mechanism 27 in the transmission case 16. It is configured to transmit power to the disc shaft 19 of the disc. The rotary tiller 12 consists of a pawl shaft 28 and a plurality of outward tilling pawls 29 planted on the pawl shaft 28, and the pawl shaft 28 is attached to each disc shaft 1.
9 and is arranged in a V-shape in plan view. Each pawl shaft 28 is rotatably supported between a bearing case 30 at the front center and the gear case 18, and is interlocked with the disk shaft 19 via gears 31 and 32 in the gear case 18, as shown in FIG. This pawl shaft 28 is rotated in the up-cut direction (arrow a) opposite to the disk shaft 19. In the embodiment, the tilling claws 29 of each rotary tilling section 12 are arranged in a row on the claw shaft 28, but the left and right phases are different from each other by 180 degrees. Each gear case 13 is also supported by the machine frame 10 via a bracket 33, and the bearing case 30 is supported by the input gear case 13 via a bracket 34. The gear case 18 is tilted forward and downward, and the pawl shaft 28 is located below the disc shaft 19, and the radius of the rotary tiller 12 is smaller than that of the disc 20. 35 is a rotary cover provided above the rotary tilling section 12, and is attached to the bracket 34 and the like. Although it is desirable that the rotary cover 35 be such that most of the tilled soil clods are scattered to the front and sides, it may be omitted.

In the above configuration, when cultivating the field,
The power from the PTO shaft 3 of the tractor 1 moves the disc 20 of the disc plow 11 to the disc shaft 19.
The tiller device 6 is towed while forcibly driving the rotary tiller 12 around the pawl shaft 28 in the direction of the arrow B and forcibly driving the rotary tiller 12 around the claw shaft 28 in the direction of the arrow A. That is,
The power from the PTO shaft 3 of the tractor 1 is transmitted from the universal joint shaft 21 to the tilling device 6 side via the input shaft 22, and is transmitted from the bevel gear mechanism 23 in the gear case 13 to the transmission shafts 24, 26 and the wrap transmission mechanism 27. Then, it is transmitted to the disc shaft 19, so that the discs 20 of the left and right disc plows 11 rotate around the disc shaft 19 in the direction indicated by arrow b. On the other hand, when the disk shaft 19 rotates, power is transmitted to the pawl shaft 28 through the gears 31 and 32 in the gear case 18, and the tilling pawls 2 of the left and right rotary tilling sections 12 are rotated.
9 rotate in the direction of the arrow a so that they are in opposite phases and do not interfere with each other.

When the rotary tiller 12 rotates in the direction of the arrow a, the claw shaft 28 is inclined with respect to the direction of movement, and the tiller claws 29 are outward-facing claws, so that the tilled soil clods, waste straw, etc. are removed as shown in FIG. As shown in , it can be eliminated by flying forward and outward in the direction of travel (arrow c) and largely to the side as shown by arrow d. Therefore, tilled soil mass,
Discarded straw etc. will not fly towards the tractor 1 side.
In addition, the tilled soil is removed from the center outward as indicated by the d arrow, and brought to the front of the passing position of the disc plow 11, so that the left and right rotary tillers 12 pass through the soil in the form of a groove with a predetermined plowing depth. The mouth opening effect is good.
After opening by the rotary plowing section 12, the field is plowed by rotating the disc 20 of the disc plow 11 as shown in FIG. 6, and the gravel 36 is turned over and moved toward the center to form ridges. In this case, since the opening is good as described above, the innermost disk 20 plows the sides of the groove-like portion, and the reversibility of the gravel 36 is very good. In addition, each disk 20 has tilled soil 3 in the center in order to till and turn over the tilled soil by the rotary tilling section 12.
7 is collected and backfills the tillage marks, so the ridges formed after tillage are not particularly high in the center, and the ridge adjustment effect is good.

The claw shaft 28 of the rotary tiller 12 is moved to the disc shaft 1.
If the height is lower than 9, the length of the tilling claws 29 can be reduced, and the input gear case 13 above the tilling claws can be lowered, thereby reducing the overall height of the tilling device 6.

The tilling pawls 29 of the rotary tilling section 12 may be provided in a line in the axial direction on the pawl shaft 28, but as shown in FIG. They may be provided at equal intervals, and this is more effective in preventing vibrations during tilling.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing one embodiment of the present invention, and FIG.
The figure is a cross-sectional side view of the same, Figure 3 is a configuration diagram of the same transmission system,
FIG. 4 is a cross-sectional side view of the main part, FIG. 5 is an explanatory view of the operation, FIG. 6 is a cross-sectional view of the tillage trace, and FIG. 7 is a plan view showing another embodiment. DESCRIPTION OF SYMBOLS 1... Tractor, 6... Tilling device, 10... Machine frame, 11... Disc plow, 12... Rotary tilling section, 19... Disc shaft, 20... Disc, 28... Claw shaft, 29... Cultivating claws.

Claims (1)

[Claims] 1 Disc plows with discs provided on the disc shaft are arranged on the left and right so as to form a V-shape in plan view, and between the left and right disc plows there are outward tilling claws, which rotate in the up-cutting direction. In a tilling device that is provided with a rotary tiller and forcibly drives the disc plow by power from a tractor, the rotary tiller has a claw shaft that is substantially parallel to the disc axis of the disc plow and that is not visible in plan view. A pair of claw shafts are provided on the left and right so as to form a letter shape, the claw shafts are arranged in front of the disc shaft separately from the disc shaft, and the claw shafts are provided on the inner end sides of the pair of left and right claw shafts. A tilling device characterized in that the tilling claws are arranged so as to overlap with each other in the left and right direction.