JPS64723Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cover device for a rotary tiller.

As is well known, an up-cut rotary tiller is provided with a main cover above the tilling section, and a front cover is fixedly attached to the front end of the main cover.

Therefore, when adjusting the plowing depth, the gap between the front cover and the ground changes, and the amount of the tiller's protrusion from the gap or the amount of the tiller's grip by the front cover changes, making it difficult to achieve good tillage. I couldn't do it.

Therefore, in order to solve the above-mentioned problems, the applicant of the present invention proposed a cover device described in Japanese Utility Model Application Publication No. 51-33507.

This conventional type supports an upper cover that covers the tilling section so as to be rotatable along the rotation locus of the tilling section,
The top cover was configured to cover the front surface of the tilling section during up-cutting, and was also configured to move up and down in conjunction with the up-and-down adjustment (tilting depth adjustment) of the gauge wheel.

However, this conventional technique was impractical because the rear cover had to be removed during upcutting, making it impossible to level the ground.

Further, in the conventional type, the rear cover was suspended by a chain, so the ground leveling performance was inferior. For example, the one described in Japanese Utility Model Publication No. 53-23620 is known as one in which the rear cover is pressed downward by a spring to improve ground leveling performance. Since a spring was interposed between the covers to elastically support the rear cover, when the plowing depth was adjusted by moving the gauge wheel up and down, the spring pressure had to be readjusted as well.

Therefore, the present invention solves the above problems by moving the front cover and the rear cover up and down in conjunction with the plowing depth adjustment, keeping the gap between the ground and the front cover constant, and keeping the gap between the ground and the front cover constant. It is an object of the present invention to provide a cover device for an upkettle rotary tiller that can always maintain a constant pressing force. Therefore, the feature is that the main cover, which is formed into an arcuate surface along the rotation locus of the tilling section of the Atsupu rotary tiller, is fixedly attached to the machine body so as to cover the upper part of the tilling section. A rear cover that covers the rear of the tilling section is pivotally supported at the rear end of the main cover so as to be rotatable in the vertical direction, and a front cover that covers the front of the tilling section is attached to the front of the main cover. A plowing depth adjustment device is provided, which is provided to move up and down along an arcuate surface, and includes a machine frame pivotably supported on the machine body so as to be freely rotatable in the vertical direction, and a grounding member attached to the machine frame, A pressing means for pressing the rear cover downward is interposed between the machine frame and the rear cover,
The front cover is operatively connected to the machine frame via a connecting means so as to move in the same direction as the machine frame moves up and down.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

In the figure, reference numeral 1 denotes an up-cut rotary tiller, and the tiller 1 is attached to a tractor or the like (not shown) via a three-point linkage mechanism 4 consisting of a top link 2 and a lower link 3 so as to be able to move up and down. The tiller 1 has a power receiving device 5 in its center, and the input shaft of the device 5 is operatively connected to the PTO shaft of the tractor via a universally connecting shaft 6. A top mast 8 projects forward and upward from the gear box 7 of the power receiving device 5, and the top link 2 is pivotally connected to the upper end of the mast 8. A support arm 9 is provided on both left and right sides of the gear box 7 and extends in the left-right direction, and the lower link 3 is pivotally connected to a bracket provided in the middle of the support arm 9 in the left-right direction so as to project forward. . A side frame 10 is provided at the outer end of the support arm 9. Of the pair of left and right side frames 10,
Transmission case 11 containing a power transmission device on one side
is provided. A tilling shaft 12 is installed horizontally between the lower end portions of the pair of left and right side frames 10, and tilling claws 13 are provided radially on the tilling shaft 12 to form a tilling section 14. Power is transmitted to the tilling shaft 12 from the power receiving device 5 through the support arm 9 and further via a power transmission device in the transmission case 11.

A rearwardly protruding bracket 15 is fixed to each midway portion of the pair of left and right support arms 9, and a plowing depth adjustment device 16 is rotatably connected to the bracket 15. This adjustment device 16 includes a pair of left and right machine frames 17 pivotally connected to a bracket 15, a tool bar 18 installed horizontally at the rear end of the machine frame 17, and a gauge provided at both ends of the tool bar 18 so as to be vertically adjustable. It has a wheel support 19 and a caster type gauge wheel 20 provided at the lower end of the support support 19.
A stay is installed horizontally in the middle of the machine frame 17 in the longitudinal direction, and a bracket 21 is provided to protrude from the stay. An adjusting screw 22 that is rotatable but not movable in the axial direction is pivotally connected to the bracket 21, and the adjusting screw 22 is screwed into a nut member 23 protruding from the top mast 8 so that it can move forward and backward. An adjustment handle 24 is provided at the upper end of the adjustment screw 22.

Further, on the outer surface of the machine frame 17, arms 25 are fixedly extended outwardly to the left and right.

A main cover 26 is provided above the tilling section 14 between the tilling section 14 and the gearbox 7, and both ends of the main cover 26 are fixed to the side frame 10. The main cover 26 is formed in an arc shape along the rotation locus of the tilling claws 13. This main cover 2
A front cover 27 is provided at the front part of 6. This front cover 27 covers the front of the tilling section 14, and both left and right sides of the front cover 27 are fixed to a stay 28 rotatably connected to the tilling shaft 12 of the side frame 10. It is set up. Therefore,
The front cover 27 is configured to be vertically movable along the outer peripheral surface of the main cover 26.

A rod 29 serving as an interlocking connection means is pivotally connected between the stay 28 and the arm 25.

Note that 30 is a main auxiliary cover, and the main auxiliary cover 30 is fixed to the rear end of the main cover 26.
A leveling plate 31 serving as a rear cover is pivotally connected to the rear end of the main auxiliary cover 30 so as to be movable up and down. The ground leveling plate 31 is a pressing device 3 provided on the machine frame 17.
It is supported by 2.

According to the embodiment of the present invention, the tiller claws 13 are of the so-called up-cut type that rotate in the direction a shown in the figure, so the tiller jumps forward from the gap between the lower end of the front cover 27 and the ground, and the tractor This will contaminate the cockpit etc. Therefore, the gap between the front cover 27 and the ground is set to a predetermined value to prevent the tiller from jumping out. but,
If the front cover 27 were fixedly provided to the main cover 26, changing the relative height between the gauge wheel 20 and the tilling shaft 12 using the tillage depth adjustment device 16 would inevitably cause the front cover to The gap between the cover 27 and the ground also changes, and the cultivator often jumps out.

Therefore, in the embodiment described above, the front cover 27 is configured to move in conjunction with the plowing depth adjustment device 16, so that the gap between the front cover 27 and the ground can always be kept constant.

That is, by rotating the adjustment handle 24, the adjustment screw 22 moves forward and backward in the nut member 23, so that the machine frame 17, which is pivotally connected to the lower end of the adjustment screw 22, moves up and down about the pivot point with the bracket 15. . Therefore, the gauge wheel 20 moves up and down to adjust the plowing depth. Since the arm 25 also moves up and down as the machine frame 17 moves up and down, the stay 28 connected to it through a rod 29 moves up and down. As a result, the front cover 27 moves up and down in conjunction with the plowing depth adjustment, and the arm 25 and stay 28
By appropriately selecting the length ratio, the gap between the front cover 27 and the ground can be maintained constant.

In addition, since the ground leveling plate 31, which is the rear cover, is supported by the machine frame 7 via the pressing means 32, the leveling plate 31 also moves up and down when adjusting the plowing depth, and the spring pressure of the pressing means is also the same. , it is possible to maintain constant leveling performance.

It should be noted that the present invention is not limited to the above embodiment, and the front cover 27 may be slidably provided on the main cover 26, and the interlocking connection means is not limited to a rod. In addition, tillage depth adjustment device 1
6 is illustrated as having a gauge wheel 20, but it may also be of a "sled" type, and the plowing depth adjustment device 16
may be located between the tiller 1 and the tractor. Furthermore, the present invention can also be adopted in a center drive type rotary tiller.

According to the present invention, since the front cover moves up and down in conjunction with the adjustment of the plowing depth, the tiller is effectively prevented from jumping out, and the operator's seat etc. are not contaminated, which is convenient.

Further, since the rear cover is also interlocked and connected to the machine frame of the plowing depth adjustment device via the pressing means, it can be moved up and down when adjusting the plowing depth, similarly to the front cover, and the soil leveling performance can be maintained constant.

[Brief explanation of the drawing]

The figure is a side view showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Tiller, 14... Tilling part, 16... Tilling depth adjustment device, 26... Main cover, 27... Front cover, 29... Connecting means.

Claims (1)

[Scope of utility model registration request] A main cover formed in an arcuate surface along the rotation locus of the tilling section of the Atsupu rotary tiller is fixedly attached to the machine body so as to cover the upper part of the tilling section, and the rear end of the main cover has the tilling section. The rear cover that covers the rear of the unit is pivoted so that it can rotate vertically.
A front cover that covers the front of the tilling section is provided at the front of the main cover so as to move up and down along an arcuate surface of the main cover, and a machine frame is pivotally supported on the machine body so as to be rotatable in the vertical direction. , a plowing depth adjustment device comprising a grounding member attached to the machine frame, a pressing means for pressing the rear cover downwards is interposed between the machine frame and the rear cover, and the front cover is connected to the machine frame. 1. A cover device for a rotary tiller, characterized in that the cover device is interlocked with the machine frame via a connecting means so as to move in the same direction as the vertical movement of the frame.