JPH01202201A - Covering device in rotary tilling apparatus - Google Patents

Abstract

PURPOSE:To reduce the adhesion of soil to an endless belt, by winding the inner surface side of the endless belt on an intermediate belt shaft and the outer surface side thereof on an intermediate belt shaft for folding back the belt, respectively, the endless belt being wound on the shafts, etc., so as to cover the rotary tilling portion of a rotary tilling apparatus from the upper side thereof. CONSTITUTION:Since the lower portion side of an endless belt 19 is bent in the shape of chovron and there are not belt shafts 23 and 24 on the lower surface side thereof, the flow of tilled soil is good and the adhesion of the soil can be therefor prevented. The endless belt 19 is wound up on the intermedi ate belt shafts 23 and 24 in the shape of a character S, but it can be prevented that soil is bit between the intermediate belt shafts 23 and 24, even if the soil is adhered to the endless belt, because a scraper 38 is equipped oppose to the intermediate belt shaft 23.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cover device for a rotary tiller.

(Prior art) As a cover device for a rotary tiller, belt shafts are arranged at front and back positions above the rotary tiller, and an endless belt is wrapped around the front and rear belt shafts so as to cover the rotary tiller from above. Japanese Patent Publication No. 31-6056 discloses an endless belt in which an intermediate belt shaft is provided for bending the lower part of the endless belt along the rotary tilling section.

This type of cover device has the advantage that it is possible to reduce soil adhesion to the endless belt during tillage, and even if soil does adhere, it can be removed by rotating the endless belt.

(Problem to be solved by the invention) However, in the past, an intermediate belt shaft for bending the endless belt along the rotary tilling section was provided closer to the rotary tilling section than the endless belt, and the outer surface side of the endless belt was Since the soil is hung on the belt shaft, soil tends to adhere to the intermediate belt shaft, and the intermediate belt shaft prevents the movement of tilled soil, reducing power consumption during tilling and wear of the tilling claws. There was a drawback when it got bigger.

In view of these conventional problems, the present invention provides a cover device that reduces soil adhesion, reduces power consumption during tilling, and reduces wear on tilling claws by devising the bending portion of the endless belt. It is something.

(Means for Solving the Problem) As a means for solving the problem, the present invention provides an endless belt 19, which is attached to belt shafts 20, 21 disposed in the front and back above the rotary tiller 6, so as to cover the rotary tiller 6 from above. An intermediate belt shaft 23 for winding the endless belt 19 and bending the lower side 19b of the endless belt 19 along the rotary cultivating section 6.
In a cover device for a rotary tiller, which is provided between the front and rear belt shafts 20 and 21, the intermediate belt shaft 23
The rotary tiller 6 is located closer to the intermediate belt shaft 23 than the intermediate belt shaft 23.
An intermediate belt shaft 24 for folding is provided so as to be spaced apart from the rotary cultivator 6 and deviated to the rear side in the rotational direction of the rotary cultivating section 6. These belt shafts 2 are wrapped around each other.
An endless belt 19 is wound around 3°24.

(Function) During tilling work, power is transmitted to the input shaft 17 and the pawl shaft 7 of the rotary tiller 6 is moved to the first position via the chain transmission mechanism 10.
Drive in the direction of arrow a in the figure. Then, since the sprocket 35 of the driving intermediate belt shaft 23 engages with the chain 14 of the chain transmission mechanism 10, the driving intermediate belt shaft 23 rotates in the direction of arrow b in FIG. The endless belt 19 is driven. Therefore, the endless belt 1
9 rotates while being hung on each belt shaft 20° 21, 22, 23, 24, and in particular, the lower part 19b rotates in the same direction as the tilling claws 8 of the rotary tiller 6 (arrow C). .

The soil clod tilled by the tilling claws 8 is thrown backward and diagonally upward under the rotational force, collides with the rear cover 41 and is crushed, and then falls downward. Also, some of the tilled soil is thrown upward by the rotational force, and the bottom side 19b of the endless belt 19
and is sent forward along this lower side 19b. At this time, most of the soil is in the third position with respect to the endless belt 19.
Although the collision occurs in the direction of the arrow d in the figure, since this part is backed up by the receiving plate 36, the endless belt 19 will not be damaged by large abnormal vibrations due to the impact, and the soil will not be crushed properly. Effects can be obtained. Endless belt 19
The lower side 195 of the tiller is bent in an F-shape, but since there are no belt shafts 23 and 24 on the lower side, the flow of tilled soil is good, and therefore soil adhesion can be prevented, and power loss and tillage claws 8 can reduce wear. Furthermore, since the soil flows in the same direction as the endless belt 19, power loss is further reduced.

The endless belt 19 is wound around the intermediate belt shafts 23 and 24 in an S-shape, but since there is a scraper 38 opposite the intermediate belt shaft 23, even if soil is attached, it will not be removed from the intermediate belt. It can be prevented from being caught between the shaft 24 and the shaft 24.

Further, there is also a soil crushing effect on the lower side of the belt shaft 23.

(Example) Hereinafter, the present invention will be described in detail with reference to the illustrated example.
In the drawings and FIG. 2, reference numeral 1 denotes a rotary machine frame, which has a gate-shaped structure with downwardly projecting side plates 4 fixed to the outer ends of support arms 3 at both ends of a gear case 2. Note that this rotary machine frame 1 is attached to the rear of the tractor via a three-point linkage mechanism 5. Reference numeral 6 denotes a rotary tilling section, which is composed of a plurality of tilling claws 8 provided on a claw shaft 7, and the claw shaft 7 is rotatably supported between the lower ends of each side plate 4 of the rotary machine frame 1 via a bearing device 9. ing. 10 is a chain transmission mechanism, and a sprocket 12.
This chain transmission mechanism 10 is housed in a chain case 15 attached to one side plate 4. The drive shaft 11 is the gear case 2
It is interlocked and connected to an input shaft 17 via a bevel gear mechanism 16 therein, and power from the tractor is transmitted to the input shaft 17. 18 is a chain tightener.

Reference numeral 19 denotes an endless belt that covers the rotary tilling section 6 from above, and is provided between the pair of left and right side plates 4 with a width that is approximately the same as the tilling width of the rotary tilling section 6. This endless belt 19 is
As shown in FIG. 3, the endless belt 19 is wound between the belt shafts 20 and 21 arranged at both front and rear ends above the rotary tiller 6, and the upper side of the endless belt 19 is wrapped around the upper intermediate belt shaft 2.
2, the lower part is wound around the driving intermediate belt shaft 23 and the folding intermediate belt shaft 24 in a V-shape, respectively.

As shown in FIGS. 4 and 5, the belt shaft 20.21 has a cylindrical shape with flanges 25.26 at both ends to prevent the belt from coming off, and the front belt shaft 20 has shaft portions 27 at both ends. The belt shaft 21 on the rear side is rotatably supported by a bearing 28 attached to the side plate 4, and the rear belt shaft 21 is supported by a bearing 31 by an end shaft 30 fixed to the side plate 4 via a flange portion 29.
It is rotatably supported via. Intermediate belt shaft 22
, 23 and 24 are also cylindrical and rotatably supported between the pair of left and right side plates 4.

The driving intermediate belt shaft 23 has shaft portions 32 at both ends as shown in FIG. The shaft portion 32 penetrates the side plate 4 and projects into the chain case 15, and a sprocket 35 that engages with the chain 14 is fixed to the projecting end. The driving intermediate belt shaft 23 is arranged above the claw shaft 7 of the rotary tiller 6, and is located near the driving intermediate belt shaft 23 and is spaced apart above the rotary tiller 6 than the intermediate belt shaft 23. Further, a folding intermediate belt shaft 24 is arranged on the rear side of the rotary tiller 6 in the rotational direction. That is, the folding intermediate belt shaft 24 is disposed above and near the rear of the driving intermediate belt shaft 23 in close proximity to the folding intermediate belt shaft 24 . The lower side 19b of the endless belt 19 is wound around the driving intermediate belt shaft 23 from below to the front side with the inner circumferential side passing from the bottom to the rear side, and around the folding intermediate belt shaft 24 with the outer circumferential side passing from the bottom to the rear side. The intermediate belt shafts 23 and 24 are bent into an F-shape along the rotary cultivating section 6.

Reference numeral 36 denotes a receiving plate that banks up the lower part of the endless belt 19, and is supported between the pair of left and right side plates 4 between the belt shafts 21 and 23. 37 and 38 are scrapers for removing deposits from the endless belt 19; the scraper 37 is supported near the bottom of the belt shaft 20, and the scraper 38 is supported near the front of the belt shaft 23 between a pair of left and right side plates 4, respectively. 3
9.40 is an end guide plate, which is arranged between the belt shafts 20.23 and 21.23 of the endless belt 19 on the inside of each side plate 4.
They are fixedly installed so as to correspond to each other between the belts and to vertically overlap with the end edges of the endless belt 19.

41 is a rear cover, and a pair of left and right side plates 4 are connected by a pivot 42.
It is pivoted at the rear end. 43 is a side cover fixed to each side plate 4. 44 is a gauge wheel, 45 is a gauge wheel support,
46 is a gauge wheel support frame.

Note that the lower side 19b of the endless belt 19 may be bent at two or more positions.

Furthermore, the rotary tiller is not limited to the down-cut method, but can also be implemented using the up-cut method.

The endless belt 19 is made of an elastic material such as rubber, or canvas impregnated with resin.

(Effects of the Invention) According to the present invention, there is a groove located near the intermediate belt shaft 23 that is further away from the intermediate belt shaft 23 and from the rotary tiller 6 and is offset toward the rear side in the rotational direction of the rotary tiller 6. An intermediate belt shaft 24 for folding is provided, with the inner surface of the endless belt 19 serving as the intermediate belt shaft 23 and the outer surface thereof serving as the intermediate belt shaft 24 for folding.
Since the endless belt 19 is wound around these belt shafts 23 and 24 so as to wrap around each of the belt shafts 23 and 24, there is an advantage that the adhesion of soil to the endless belt 19 is reduced, and power consumption and wear and tear on the tilling claws 8 can be reduced. .

(Other Disclosures) In FIG. 7, an endless belt 19 is provided above the rotary tiller 6, and a handle 50 is attached to the belt shaft 20 as necessary, so that the endless belt 19 can be rotated by manual operation. It is. Note that the endless belt 19 has interlocking teeth 5 on the inner circumference.
It is a timing belt type with 1.

In this case, by rotating the endless belt 19,
Soil attached to the surface can be removed.

FIG. 8 shows a type in which the endless belt 19 runs laterally. The endless belt 19 has a belt shaft 62 inside the side plate 4.
．． 63, and is also wound around the central driving belt shaft 64 via guide shafts 65, 66, etc., and the driving belt shaft 64 is wound around the PTO shaft 6 at the rear end of the gear case 2.
7 through a chain transmission mechanism 68.

According to this, during the tilling operation, the endless belt 19 rotates laterally as shown by the arrow e, and the scraper 69 at one end scrapes off the soil adhering to the lower surface side.

[Brief explanation of the drawing]

1 to 6 show one embodiment of the present invention, in which FIG. 1 is an overall side view, FIG. 2 is a schematic rear view of the same, FIG. 3 is a cross-sectional view of the winding structure of an endless belt, and FIG. 4 is a plan view of the front belt shaft support structure, FIG. 5 is a sectional plan view of the rear belt shaft support structure, and FIG. 6 is a sectional plan view of the drive intermediate belt shaft support structure. FIG. 7 is a side view showing another rotary tilling device, and FIG. 8 is a schematic rear view showing still another rotary tilling device. 1... Rotary machine frame, 6... Rotary tilling section, 19
... Endless belt, 20.21 ... Belt shaft, 22,
23.24...Intermediate belt.

Claims (1)

[Claims] (1) The endless belt 19 is wound around the belt shafts 20 and 21 arranged above the rotary tiller 6 in front and rear so as to cover the rotary tiller 6 from above.
In a cover device for a rotary tiller, in which an intermediate belt shaft 23 is provided between the front and rear belt shafts 20 and 21 for bending the lower side 19b of the rotary tiller along the rotary tiller section 6, a belt shaft 23 is provided near the intermediate belt shaft 23. Intermediate belt shaft 23
An intermediate belt shaft 24 for folding is provided at a distance from the rotary tilling section 6 and deviated to the rear side in the rotational direction of the rotary tilling section 6, so that the inner side of the endless belt 19 is closer to the intermediate belt shaft 2.
3. A cover device for a rotary tiller, characterized in that the endless belt 19 is wound around the belt shafts 23 and 24 so that the outer surface side is wrapped around the folding intermediate belt shaft 24, respectively.