JPH0647202Y2 - Rear cover of rotary tiller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Use The present invention relates to a rear cover of a rotary tilling device for performing plowing, ridge or other work.

(B) Conventional technology Conventionally, a pair of left and right vertical frames and their rear ends are connected by a horizontal frame to form a toolbar, a ridger is hung between the horizontal frames, and a rear cover whose lower portion is curved rearward. A rotary cultivator equipped with pressure rods on both sides of the rear cover and a triangular notch with a rear opening in the middle of the rear cover, and the notch is closed with a closing plate is the actual open sho 60-87501. It is already known from the gazette.

It is already known from Japanese Utility Model Publication No. 57-18883 that the closing cover is divided into left and right parts and screwed on both sides of the notch of the rear cover.

(C) Problems to be solved by the invention In the known rotary cultivator, when the former closing plate is replaced with the latter closing plate, the lower part of the split cover collides with the curved part of the lower part of the rear cover. As a result, a wide gap must be provided between the side edge of the cutout and the outer edge of the split cover.With this configuration, the cultivated soil flows out. And produce ridges on the plowing surface and weeds in this gap,
When stumps, compost, etc. become clogged, the plowed soil accumulates on the front surface of the rear cover and rises, which causes resistance to the plowing of the plow claws and causes problems such as roughening of the plowed soil surface. .

Therefore, in order to solve the above-mentioned problems, hinge arms are erected on the upper and lower portions of the upper surface of the rear cover at the side of the cutout portion and the upper surface of the outer side of the split cover, and the upper ends of the hinge arms are rotatably connected. However, when the split cover is opened, the rear part of the split cover comes into contact with the tool bar or the pressure rod and the opening of the split cover is limited, which makes it difficult to mount the ridger. Since it was not possible to sufficiently approach the tilling claws, there were problems that the ridge resistance increased and the ridges could not be raised.

(D) Means for Solving the Problems In the present invention, a toolbar is composed of a pair of left and right vertical frames that move up and down around a front part and a horizontal frame that connects their rear ends, and the middle of the horizontal frames. In a rotary tiller equipped with pressure rods on both sides of a rear cover whose lower part is curved rearward, the ridge upright is suspended from the rear cover, and the left and right middle parts of the rear cover are inclined with both side edges. In the front of the toolbar, a cutout is formed to form a substantially triangular shape, and a split cover is provided which is divided into left and right at the inner center and a lower portion is curved backward so as to close the triangular cutout. At least two pairs of upper and lower hinge arms are erected on the upper surface of the outer side of the split cover and the upper surface of the rear cover on the side of the notch, and the pair of upper and lower hinge arms are formed low and the pair of lower hinge arms are raised. The upper and lower fulcrum pins are formed so that the hinge arms forming the pair are inclined so that the lower part is largely separated from the upper surface of the rear cover than the upper part.
A virtual pivot axis connecting the upper and lower fulcrum pins is connected to the upper and lower portions of the rear cover with respect to the upper surface on the notch portion side of the rear cover so that the lower portion is away from the upper portion of the inner surface of the split cover. The above-mentioned problems are solved by arranging them in a slanting manner.

(E) Action When performing cultivating work, close the split covers and tighten the central overlapping portion, and when performing ridge work, open the left and right split covers, and the hinge arms below those split covers will be high. On the other hand, the upper hinge arm is low, and the rotation center of the hinge is connected by upper and lower fulcrum pins inclined so that the lower part is separated from the upper part of the rear cover from the upper part, and a virtual pivot point connecting the upper and lower fulcrum pins. Since the support shaft is arranged so as to be linearly inclined with respect to the upper surface of the rear cover on the side of the cutout portion so that the lower portion is farther from the upper portion of the upper surface of the outer portion of the split cover, the upper portion of the split cover is slightly It will only rise and will not be damaged by colliding with the tool bar or pressure rod, and the lower part will be greatly separated laterally from the notch part of the rear cover and opened sufficiently to mount the ridger close to the rotary. You can

Moreover, when the split cover is opened, the split center of the split cover is opened and pivoted outward about the fulcrum of the hinge arm, although both the rear cover and the lower part of the split cover are curved rearward. Therefore, both of the curved portions do not interfere with each other and can be easily opened.
It is possible to make the outer edge of the split cover close to the rear cover with the split cover closed, so that weeds, stubble, compost, etc. do not become clogged between the split cover and the notch of the rear cover during cultivating work, and The plowing soil surface can be finished smoothly.

(F) Embodiments An embodiment of the present invention will be described with reference to the drawings. The rotary tiller 1 is connected to a tractor or other towing vehicle, and the input shaft 2 is driven by a shaft such as a tractor.
The lower part of the cultivating shaft is provided with the cultivating claw 3, the upper surface of the rotation path of the cultivating claw 3 is covered with the rotary cover 5, and the upper and lower parts thereof are two frame rods having the front end pivotally supported and their rear end parts. A tool bar 6 consisting of a horizontal rod connected to the above is suspended by an adjusting rod 7 with a handle 7a so that it can be tilted up and down.
A rear cover 10 whose lower part is curved rearward is screwed to the rear part so as to be rotatable up and down, and the pressure rods 11, 11 erected rotatably on the rear cover 10 project rearward from the toolbar 6. The arms 12 and 12 are held so that they can be raised and lowered.

The central portion of the rear cover 10 in the left-right direction is notched into a substantially triangular shape up to the threaded portion, and the notch is a right-angled triangular divided cover 13 and 13 whose left and right portions are curved rearward. The outer edges of the divided covers 13, 13 which are configured to be divided into left and right inside the central portion are formed such that the upper portion is gently inclined and the lower portion is formed steeply, and the central portion is partially Polymerized.

The upper and lower portions of the outer edges of the split covers 13 and 13 are inserted into the hinge arms 14a and 14b and the holes in the upper portions of the main body of the rear cover 10, respectively. The upper and lower fulcrum pins 15 and 15 inclined so as to be separated from each other are connected to each other, and the linear virtual pivot axis L connecting the upper and lower fulcrum pins 15 and 15 is connected to the upper surface of the rear cover 10 on the notch portion side. , The hinges 1 so that the upper surfaces of the inner portions of the above-mentioned split covers 13 and 13 are distant downward from above.
6 and 17, the upper hinge 16 is connected to the lower hinge 1
Lower than 7 and rotatably connected, the split cover 1
The overlapped portions of 3 and 13 are fixed at upper and lower two places, and attachment metals 18 and 18 are screwed with butterfly screws 20 and 20.

21 is a ridger, which is a blade plate 22 and a quartet plate whose rear part is opened.
23, cultivating plates 25, 25 connected to the rear ends of both sides thereof, and flat plates 26, 26 extending rearward from the upper part of the cultivating plates 25, 25 are adjusted to the blade plate 22. A support column 28, which is erected by a handle 27 so as to be adjustable in front and rear angles, is attached to the tool bar 6 so as to be vertically adjustable.

When performing a normal tilling work, the dividing covers 13 and 13 are closed as shown in FIG. 2 without attaching the ridger 21, and are fixed by tightening the thumbscrews 20 and 20. If you want to do the above, pull out the butterfly screws 20 and 20, and split the cover 1
Open the inner center of 3, 13 by opening left and right as shown in FIG. At that time, the curved portion at the bottom of the split covers 13, 13 is
The rear cover 10 is pivoted to the upper side while bypassing the lower curved portion, and in this state, the ridger 21 is inserted from the rear into the opening formed in the center of the rear cover 10 and attached to the toolbar 6. Then, the quartet plate 23 of the ridger 21 can be brought sufficiently close to the rotation locus of the tiller 3 as shown in FIG.
The soil scraped up by the tilling claw 3 falls on the quartet board 23 and flows down while being divided into left and right, and is further guided by the board surface and pushed up by the cultivating board 25, 25 to be raised to both sides. Then, the flat plates 26, 26 level the top of the raised soil.

When the ridger 21 is mounted, the substantially triangular opening formed in the center of the rear cover 10 in the left-right direction has a split cover.
Due to the shape of 13, 13, that is, the upper ends of the split covers 13, 13 are lateral along the threaded portion of the rear cover 10, and the outer edges that follow are gently inclined, so that they have a substantially ladder shape. The ridger 21 can be mounted sufficiently close to the tiller 3.

Also, when the split covers 13 and 13 are opened, the upper hinge
If 16 is flush with the lower hinge 17, the split cover 1
The inner edges of 3, 13 interfere with the toolbar 6 as shown in FIG. In order to prevent this, if the adjusting rod 7 is reduced and the ridger 21 is tilted forward, the rear part is lifted and becomes unstable, and the tilting plate 23 is inclined at a large angle to increase traction resistance. In addition, the performance of raising the soil deteriorates, so the adjustment handle 27 must be adjusted.

However, in the above-described embodiment, since the upper hinge 16 is lower than the lower hinge 17, the upper portions of the inner edges of the split covers 13 and 13 in the open state in which the split covers 13 and 13 are rotated upwards. The height can be lowered as shown in FIG. 5 to prevent the split covers 13, 13 from interfering with the tool bar 6, and the rear part becomes higher and retracts to the side, whereby the ridges. High ridges can be raised with the standing machine sufficiently close to the tillage claws.

(G) Effect of the Invention According to the invention, the tool bar 6 is composed of a pair of left and right vertical frames that move up and down around the front part and a horizontal frame that connects the rear ends thereof, and the ridger is provided in the middle of the horizontal frames. In the rotary cultivating device in which a pressure rod is attached to both sides of the rear cover 10 whose lower part is curved rearward, the left and right intermediate portions of the rear cover 10 are inclined with respect to both side edges in plan view. A split cover in which a notch is formed in a substantially triangular shape in front of the tool bar 6, and the triangular cutout is divided into left and right at an inner center and a lower portion is curved rearward.
13 and 13 are provided, and at least two pairs of upper and lower hinge arms 14a and 14b are erected on the upper surface of the outer side of the split covers 13 and 13 and the upper surface of the rear cover on the side of the notch, and a pair of hinge arms is formed above. 14a is formed low, a pair of hinge arms 14b is formed high below, and the pair of hinge arms 14a and 14b are tilted so that the lower part is separated from the upper surface of the rear cover 10 more than the upper part. , 15 and the virtual pivot axis L connecting the upper and lower fulcrum pins 15, 15 with respect to the notch side upper surface of the rear cover 10 from the upper part of the outer surface of the split covers 13, 13. Also, since it was arranged with a linear inclination so that the lower part gets away,
Although the rear cover 10 and the lower portions of the split covers 13 and 13 are curved rearward, when opening the split covers 13 and 13,
The lower parts of the split covers 13 and 13 are swung to a large extent to form a rear cover.
By bypassing the curved portion at the bottom of 10, both can be easily opened without interference.

At that time, since the upper hinge arm 14a is lower than the lower one, the split covers 13 and 13 do not come into contact with the tool bar 6 or the springs of the pressure rods 11 and 11, and the ridger 21 is held. The ridges can be easily attached and detached, and the ridges can be easily approached to the cultivating claws 3 to form high ridges with a small ridge resistance.

Further, when the cutout portion of the rear cover 10 is closed by the split covers 13 and 13, the side edges of the cutout portion and the outer edges of the split covers 13 and 13 can be sufficiently brought close to each other, and the cultivated soil surface can be covered. A smooth cultivated surface can be leveled without forming ridges or clogging with weeds, stumps, compost or the like between the side edges.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a perspective view of a lory tiller equipped with a ridger, FIG. 2 is a plan view of the same without the ridger, and FIG. The figure is a perspective view of the state in which the central portion of the rear cover is opened by rotating the split cover upward, and FIG. 4 (a) is a side view of the split cover.
(B) is a rear view of the same as above, FIG. 5 is a side view showing a ridged state,
FIG. 6 is a side view showing a state in which the split cover interferes with the toolbar when the upper and lower hinges have the same height. 1 ... Rotary tiller, 6 ... Toolbar, 10 ... Rear cover, 13 ... Split cover, 14a, 14b ... Hinge arm, 16,17 ... Hinge, 21 ... Ridder, 15,15 ... Support pin, L ... Virtual pivot axis

Claims (1)

[Scope of utility model registration request] 1. A tool bar 6 is composed of a pair of left and right vertical frames that move up and down around a front part and a horizontal frame connecting their rear ends, and a ridger 21 is suspended in the middle of the horizontal frames. Like no
In the rotary cultivating device 1 in which pressure rods 11, 11 are attached to both sides of a rear cover 10 whose lower portion is curved rearward, the left and right intermediate portions of the rear cover 10 are inclined both side edges, and are in front of the toolbar 6 in plan view. A cutout is formed in a substantially triangular shape, and split covers 13 and 13 are provided which are divided into left and right at an inner center and a lower portion is curved rearward so as to close the triangular cutout. 13, 13
At least two pairs of upper and lower hinge arms 14a and 14b are erected on the upper surface of the outer side of the rear cover and the upper surface of the rear cover 10 on the notch side, and the hinge arm 14a forming a pair above is formed low, and the hinge forming a pair below. The arms 14b are formed high, and the hinge arms 14a and 14b forming a pair thereof are connected by upper and lower fulcrum pins 15 and 15 which are inclined so that the lower portions are greatly separated from the upper surface of the rear cover 10 from the upper portions, and the upper and lower fulcrums are connected. pin
An imaginary pivot axis L connecting 15 and 15 is linearly inclined with respect to the upper surface of the rear cover 10 on the side of the notch so that the lower portion of the divided covers 13 and 13 is more distant from the upper portion of the upper surface of the outer portion. The rear cover of the rotary tiller, which is characterized by being installed.