JP2671014B2 - Tillage cover for rotary tiller - Google Patents

Description

Description: (a) Field of industrial application The present invention relates to a mounting structure of a tilling cover of a rotary tiller mounted on a rear portion of a tractor.

(B) Conventional Technology Conventionally, there has been known a technology in which the whole or only the rear part of the tilling cover can be rotated up and down around a pivot pin.

For example, Japanese Utility Model Application Laid-Open No. Sho 62-60102 and Japanese Utility Model Application Laid-Open No.
No. 1, JP-A-61-35704, and the like.

Further, as in the technology of Japanese Patent Publication No. 53-27165, Japanese Utility Model Publication No. 36-18817, and Japanese Utility Model Publication No. 62-97502, etc., the plowing cover is configured in an arc shape and the plowing pawl shaft is set in the middle. It is also known that the rear cover can be turned up and down around the rotation locus of the tip of the tilling claw, and the rear cover can be turned up and down.

(C) Problems to be Solved by the Invention However, as shown in FIG. 6, in the case of deep plowing work, the plowing cover 20 "is rotated forward to raise the rear cover as much as possible, and the range of the pocket A is increased. To increase horsepower loss. The range of pocket A is increased, but the rotation fulcrum of the rear cover 29 "is not so high that the rotation position of the rear cover that operates as a sensor for controlling the working depth is increased. However, there was a problem that the plowing depth control did not work accurately because the angle was changed due to the deviation.

(D) Means for Solving the Problems The problems to be solved by the present invention are as described above,
Means for solving the problem will be described.

Between the gearbox 6 of the rotary tiller R and the turning locus B of the tiller 13, near the line connecting the center of the beam 7 protruding laterally from the gearbox 6 and the center of the tiller shaft 12. A pivot pin 22 is provided, and the pivot pin 22 is cultivated and covered.
In the configuration in which the front end of the rear cover 29 is pivotally connected to the rear end of the tilling cover 20 as the center of rotation of the tilling cover 20, the vertically rotating position of the tiller cover 20 about the pivot support pin 22 is continuously adjusted. Adjust the adjustment handle 27 to the support stay on the tillage cover 20.
25 and a support stay 26 provided on the side of the gear box 6, the amount of rotation of the rear cover 29 that rotates up and down about the rear end of the tilling cover 20 is detected by the sensor rod on the upper surface of the rear cover 29. It is configured so as to be detected by 30 and to be fed back to the hydraulic control device that raises and lowers the lift link 5.

(E) Embodiment The purpose of the present invention is as described above, and the configuration of the present invention will be described based on the configuration of the embodiment shown in the accompanying drawings.

FIG. 1 is a side view of a rotary tillage device according to the present invention, FIG.
The figure is also a rear view.

The rotary tiller R of the present invention pivotally supports a top link 2 on a hitch 1 fixed to a rear end of a tractor body, and a front end of a main support 3 on a rear end of the top link 2.

Further, the lower link 4 is pivotally supported at the rear end of the mission case of the tractor, and the rear end is pivotally connected to the front ends of the support plates 8L, 8R fixed to the beams 7L, 7R protruding laterally from the gearbox 6. An upper end of a lift link 5 is pivotally connected to a lift arm in the middle of the lower link 4, and the rotary tiller R can be moved up and down by rotating the lift arm.

Pivot the main support 3 on the gearbox 6,
The middle part of the main support 3 and the support plates 8L, 8R
Side supports 9L and 9R are interposed between and.

A side plate 10 is fixed to the side end of the beam 7L, a chain case 11 is fixed to the side end of the beam 7R, and a plowing claw shaft 12 is mounted on the lower ends of the side plate 10 and the chain case 11. .. are planted on the tiller shaft 12.

The drive of the tiller shaft 12 projects to the rear end of the tractor
It is transmitted from the PTO shaft to the input shaft 15 of the gearbox 6 via the universal joint 14, and from the input shaft 15 via the bevel gear to the transmission shaft 16 in the beam 7R from the chain case 11
Drives the sprocket inside and cultivates the claw shaft through the chain
Drive twelve.

A plowing cover 20 is provided on the turning locus B of the tip of the plowing claw 13 in order to prevent scattering of the plowing soil due to the rotation of the plowing claws 13, 13 ,. The pivot pipes 21L and 21R are fixed to the
On the line connecting 0 and the center of the tiller claw shaft 12 of the chain case 11 with the center of the beam 7, pivot pins 22L and 22R are provided at an intermediate position between the gear box 6 and the upper end of the rotation locus B of the tip of the tiller claw 13. By projecting and pivotally supporting the pivot pipes 21L and 21R, the tilling cover 20 is rotatable.

In the case of a sensor drive type rotary tiller, pivot pins 22 can be provided at the lower ends of both ends of the beams 7L, 7R to pivot the till cover 20, and the opening for inserting the chain case is the same as the conventional one. It can be smaller than that.

In addition, the side cover 23L fixed to the side surface of the tilling cover 20,
An arcuate long hole 23a, 23b, 23c centering on the pivot pin 22L, 22R is opened in 23R, and the side plate 10 and the chain case 11 are mounted with bolts 24, 24 ... 2
0 is reinforced.

Then, a support stay 25 is projected on the tilling cover 20, a support stay 26 is also projected on the side surface of the gear box 6, and an adjustment handle 27 is interposed between the support stays 25, 26 to adjust the adjustment. By turning the handle 27, the till cover 20 can be turned.

A rear cover 29 is pivotally connected to the rear end of the cultivating cover 20, a sensor rod 30 is provided on the upper surface of the rear cover 29, and the tip end of the sensor rod 30 is connected to a hydraulic control device via a wire. It enables plowing depth control.

In the configuration shown in FIG. 5, the side plates 10 and the chain case 1 are each integrally provided with a side cover, and the cover placket 32L, 32 is provided inside each side cover portion.
R is affixed and bolts 33, 33, are attached to the cover brackets 32L, 32R.
33, 33 are erected, while long holes 2 are provided at both ends of the tilling cover 20 '.
The openings 0a, 20a ... Are opened and inserted into the bolts 33, 33, 33, 33 and fixed by the nut so that the position can be adjusted.

With this structure, the tilling cover may not be arcuate, and can be easily adjusted by simply sliding it.

(F) Operation of the invention In such a structure, when performing shallow plowing work, as shown in FIG. 3, if the rear part is lowered around the pivot pin 22 of the tillage cover 20, the height of the pivot part of the rear cover 29 will be increased. The height H is almost the same as the height at the time of standard tillage, and the tillage depth control can be performed as accurately as at the time of standard tillage. The space of the pocket A is almost the same and the tillage can be performed without loss of horsepower.

When performing deep plowing work, as shown in FIG.
The tilling cover 20 can be raised rearward about the pivot pin 22 and the pivot point of the rear cover 29 can be raised to a height approximately the same as the standard height H, so that the plowing depth control can be performed exactly as in the standard time. You can do it.

Then, the space of the pocket A'can be made larger than that in the shallow tilling work, and the crushed arable soil falls into the pocket A ', the flow is improved, and the tilling is efficiently performed.

(G) Effects of the Invention Since the present invention is configured as described above, it has the following effects.

In FIG. 1, even when performing deep plowing work, if the rear of the tillage cover 20 is adjusted and raised by the adjusting handle 27, the rear pocket A can be made large, so that the flow of tilling soil is improved and the efficiency is improved. He was able to cultivate and was able to eliminate the lack of horsepower.

Secondly, since the cultivating cover 20 rotates up and down around the pivot pin 22, when the rear pocket A of the cultivating cover 20 is made large, the front space of the cultivating cover 20 becomes narrow and the cultivating cover 20 is narrowed. The flow of soil can be increased backwards.

Thirdly, since it is possible to cope with the plowing depth simply by rotating around the pivot pin 22, it is not necessary to add an extended rear cover, which can reduce the cost and facilitate adjustment according to the plowing depth. It became possible to do it.

Fourthly, by rotating and adjusting the adjusting handle 27, the height of the rear end of the tilling cover 20 can be adjusted according to the working depth, so that the height of the pivot point of the rear cover 29 can be adjusted. It became possible to adjust the height to the same level as the standard time, regardless of the working depth, and the working depth became constant when controlling the working depth, and the finish could be cleaned.

Fifth, the fulcrum of the cultivation cover 20 is defined by the beam 7 and the cultivation claw.
Since it is provided on the line connecting the centers of 12 and between the rotation path of the gear box 6 and the plowing pawl 13, the turning amount of the rear end of the plowing cover 20 can be made large, and the transmission shaft 16 and the plowing pawl can be provided. axis
It has become possible to shorten the period of 12 minutes.

[Brief description of the drawings]

FIG. 1 is a side view of the rotary tiller of the present invention, FIG. 2 is a rear view of the same, FIG. 3 is a side sectional view of the rotary tiller showing a state during shallow tillage work, and FIG. FIG. 5 is an assembled perspective view showing another embodiment of the mounting structure of the tilling cover, and FIG. 6 is a side view showing the conventional tilling work. B …… Rotation locus R …… Rotary tiller 6 …… Gear box 7 …… Beam 12 …… Tilling claw shaft 13 …… Tilling claw 20 …… Tilling cover 22 …… Pivot pin

Claims (1)

(57) [Claims] 1. A gearbox 6 between a gearbox 6 of a rotary tiller R and a turning locus B of a tiller claw 13.
A pivot pin 22 is provided in the vicinity of a line connecting the center of the beam 7 projecting more to the side and the center of the tiller claw shaft 12, and the pivot pin 22 serves as the center of rotation of the tiller cover 20. In the configuration in which the front end of the rear cover 29 is pivotally connected to the rear end, an adjusting handle 27 for steplessly adjusting the vertical rotation position of the tilling cover 20 about the pivot pin 22 is provided on the tilling cover 20. The rear stay 29 is interposed between the support stay 25 and the support stay 26 provided on the gear box 6 side, and the rear cover 29 rotates up and down about the rear end of the tillage cover 20. The lift link 5 is detected by the sensor rod 30.
A tilling cover for a rotary tiller, which is configured to be fed back to a hydraulic control device that raises and lowers.