JPH07155003A - Foldable leveling plate for rotary operator - Google Patents

Abstract

PURPOSE:To provide a foldable leveling plate which is equipped with the rotary operator and the central plate supported with a couple of right and left pins and oblong holes between both of the right and left leveling plates whose individual central parts can fold and extend these leveling plates, thus can readily do the leveling work of high exactness. CONSTITUTION:The rotary operator is set to the rear of the tractor through the three-point link mechanism so that it is made liftable and the power is transmitted from the PTO shaft of the tractor to the gear box of the operator and the leveling plate 30 is set to the rear of the rotary operator. At the same time, the rotary operator and the leveling plate 30 extending from the central parts including the gear boxy to both right and left side are set so that they may be made foldable and extensible from the central part toward both horizontal directions. Further, the central leveling plate 30 a which is supported with a couple of the right and left pins 30b and oblong holes 30c in which each pin 30b is slidably inserted are set between both right and left leveling plates 30 whose central parts fold and extend the rotary operator and the leveling plates 30 in the horizontal direction. Thus, the operations becomes easy and the leveling work can be done in high accuracy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mounted on a rear portion of a tractor via a three-point link mechanism so as to be able to move up and down. The present invention relates to a flat plate of a folding rotary working machine in which a flat plate is horizontally folded from a central portion and is provided so as to be expandable.

[0002]

2. Description of the Related Art Conventionally, a tractor is mounted on a rear portion of the tractor so as to be able to move up and down via a three-point link mechanism so that power is transmitted from a PTO shaft of the tractor to a gear box of a working machine, and a flat plate is provided behind the rotary working portion. In addition to the above, there is known a rotary working machine in which a rotary working unit extending horizontally from a central portion including a gear box and a flat plate are horizontally foldable from the central portion and can be deployed. In the conventional flat plate of the rotary working machine, when it is deployed and used, a gap is generated between the flat plates on both the left and right sides of the central portion.
It is attached to the left and right flat plates with nuts and removed when folding, or work is performed with a gap left without providing a central flat plate.

[0003]

By the way, in the flat plate of the rotary working machine described above, when the work is performed with a gap provided without providing the central flat plate, the work of the part flattened by another flat plate is performed. Marks and steps are generated, which is not preferable.
If the center flat plate is attached between the flat plates on both the left and right sides of the center part with pins or bolts and nuts when it is unfolded when it is in use, and it is removed when folding, the worker will descend from the tractor and the rotary work machine. There was a problem in that the work had to be carried out around the rear of the machine, the pins had to be removed and inserted, and the bolts and nuts had to be attached and detached, and the work was troublesome, and the hands were dirty especially in the case of scratching work. The present invention has been made for the purpose of solving the above problems.

[0004]

In order to achieve the above object, the present invention is mounted on a rear part of a tractor so as to be able to move up and down through a three-point link mechanism, and a power is transmitted from a PTO shaft of the tractor to a gear box of a working machine. A flat plate is provided in the rear of the rotary working part so that the rotary working part and the flat plate extending from the central part including the gear box to the left and right can be folded and expanded horizontally from the central part. In the working machine, the rotary working part and the flat plate are horizontally folded and supported by a pair of left and right pins and a long hole into which the pins are slidably inserted between the flat plates on both the left and right sides of the central portion to be unfolded. It is characterized in that a central flat plate is provided.

[0005]

In the flat plate of the folding type rotary working machine of the present invention having the above-mentioned structure, the central flat plate has the pair of left and right pins and the pins slidably fitted between the flat plates on both the left and right sides of the central portion. Since it is supported, when the rotary working part and the flat plate are folded and unfolded in the horizontal direction, the flat plate on both left and right sides of the central part is always connected by the flat plate for easy handling and leveling work. The accuracy is improved and the operator's hands are not soiled.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the accompanying drawings. 4 to 6, reference numeral 1 is a rotary working machine having a long length in the left-right direction and having a function of crushing and scraping, and a well-known three points including a top link and a lower link of a tractor (not shown) at the front thereof. A tractor connecting portion 2 connected to the link mechanism is provided, and the tractor is mounted on the rear portion of the tractor so as to be able to move up and down. Also, the tractor's PTO
Power is transmitted from the shaft to the gear box 3 of the rotary working machine 1 via a universal joint, a transmission shaft, etc. via an input shaft (not shown).

The rotary working parts 5 and 5 including the transmission systems 4 and 4 extending from the gear box 3 to the left and right sides are connected to the link arms 7 from the left and right side parts of the central portion 6 including the gear box 3.
In the state of being connected with each other, it is manually rotated by 90 degrees in the front-rear (horizontal) direction about the hinge portions 8 and 8, and is displaced into a working state in which it is deployed in the left-right direction and a folded state in which it is folded toward the rear of the machine body. It is like this. Then, between the left and right sides of the central portion 6 of the front part of the machine body and the rotary working parts 5, 5, the rotary working parts 5, 5 are automatically locked when they are deployed in a working state, and the rotary working parts 5, 5 are folded. Occasionally, a working state lock mechanism 9 for manually unlocking the lock
Is provided.

As shown in FIGS. 7 and 8, the working state lock mechanism 9 has shafts 12, 13 on the central portion 6 side with respect to lock pins 10, 11 mounted on the rotary working portions 5, 5 side.
Engagement hooks 14 and 15 pivotally supported via are provided so as to be engageable (lockable) and disengageable (lockable). The operating lever 16 is attached to the engaging hooks 14, 15
The arms 17 and 18 connected coaxially are fixed to the
A connecting rod 19 connects between the connecting arms 17 and 18. The connecting rod 19 passes through the inside of the pipe frame 6b which connects the vertical frames 6a of the central portion 6 in the horizontal direction. Further, a toggle spring 20 composed of a torsion spring is installed between the engagement hook 14 and the central portion 6, and the engagement hook 15 is provided with an automatic return lever 21.

The working state lock mechanism 9 has a lock pin 10a, which moves as shown in FIG. 7, when the rotary working portions 5 and 5 are expanded to the working state (FIGS. 4 and 5).
11a is an inclined surface (cam surface) 14 of the engaging hooks 14 and 15
By sliding along a and 15a, the engaging hook 14 is pushed up within a range not exceeding the dead point O against the elastic force of the toggle spring 20, and at the same time, the engaging hook 15 is turned down so as to rotate. Automatically locks. In addition, the rotary working units 5 and 5
To fold, hold the operation lever 16 and rotate to the imaginary line in FIG. 7, that is, the state in FIG. 8 against the elastic force of the toggle spring 20. Then, as the engaging hook 14 and the connecting arm 17 rotate, the engaging hook 15 rotates via the connecting rod 19 and the connecting arm 18, and the lock pins 10 and 11 are unlocked. Is the dead point O
And the engaging hooks 14 and 15 are held in the unlocked state.

When the engagement hooks 14 and 15 are unlocked, the lock pin 11 is engaged with the automatic return lever 21.
When 5 is folded, the lock pins 10 and 11 respectively move in the directions of the arrows, the automatic return lever 21 is pushed up and the engaging hook 15 rotates, and the connecting arm 18 and the connecting rod 1
By rotating 9 the toggle spring 20 exceeds the dead point O, and the working state lock mechanism 9 is returned to the state shown by the solid line in FIG. 7, that is, the locked state (lock standby state). Toggle spring 20
Is set so that, while the operation lever 16 is rotated by 45 degrees, it is held in the locked state at 30 degrees and held in the unlocked state at 15 degrees.

Corresponding to the link arm 7 which is moved by the rotating operation when folding the rotary working parts 5, 5, as shown in FIGS. 9 to 11, the central portion 6 and the rotary folded as shown in FIG. Between the working parts 5 and 5, the rotary working parts 5 and 5 are automatically locked when folded from the deployed state by 90 degrees and rotated to the folded state, and the rotary working parts 5 and 5 are folded from the folded state of FIG. A folding state locking mechanism 22 is provided, which is unlocked by human power and is returned to the locked state by the operation of unfolding the rotary working portions 5 and 5 when the working state of FIGS. 4 and 5 is developed. .

The folding state lock mechanism 22 pivotally supports the engaging hook 24 on the central portion 6 by the shaft 23, and engages (locks) the engaging hook 24 with the lock pin 25 attached to the link arm 7. It is provided so that it can be unlocked (unlocked). An operation lever 26 is fixed to the engaging hook 24, and a toggle spring 27, which is a torsion spring, is provided between the engaging hook 24 and the central portion 6. Further, an inclined surface (cam surface) is formed on the engaging hook 24, an automatic return lever 28 is attached, and a contact pin 29 is provided on the link arm 7.

The folding state lock mechanism 22 is rotated when the rotary working portions 5 and 5 are folded from the unfolded state (FIGS. 4 and 5) to the folded state (FIG. 6) by 90 degrees. The link arm 7 and the lock pin 25 are moved by the operation, and the lock pin 25 is engaged with the engaging hook 2.
4 slides along the inclined surface (cam surface) 24a, pushes up the engaging hook 24 against the elastic force of the toggle spring 27 within a range not exceeding the dead point O, and automatically locks (see FIG. 9). Status). Further, when the rotary working parts 5 and 5 are expanded to the working state, the operation lever 26 is held and the toggle spring 27 is held.
It rotates to the state of FIG. 11 against the elastic force of. Then,
The locked state of the engagement hook 24 and the lock pin 25 is released, the toggle spring 27 crosses the dead point in the middle of the process, and holds the engagement hook 24 in the unlocked state.

When the engagement hook 24 is unlocked, the automatic return lever 28 is in contact with the contact pin 29. In this state, when the rotary working parts 5 and 5 are rotated to the working condition, the link arm 7 is moved. And the lock pin 25 moves. By this movement, the automatic return lever 28 moves the contact pin 2
9 is pushed up in sequence and the engaging hook 24 is rotated,
The toggle spring 27 goes beyond the dead point and returns the folded state locking mechanism 22 to the state of FIG. 9, that is, the locked state (lock standby state). As with the toggle spring 20, the toggle spring 27 is set such that, while the operation lever 26 rotates 45 degrees, the toggle spring 27 holds the lock state at 30 degrees and the lock release state at 15 degrees. .

Rotary working units 5 and 5 of the rotary working machine 1.
4 and FIG. 5, the flat plate 30 is installed behind the central portion 6 and the rotary working parts 5 and 5 (rotary working part) in a deployed state as shown in FIGS. 4 and 12. This flat plate 3 is provided so as to be divided into two in the vertical direction.
0 is formed with a large number of three-dimensional notches 31, 31 ... In addition, the notch for draining water in the conventional flat plate was a plane notch. For this reason, during the scraping work, the water and mud to be leveled were protruding to the side of the level plate.

When the flat plate 30 is formed with the three-dimensional cutouts 31, 31, ... As described above, when the rotary working machine 1 performs the scraping work, as shown in FIG. The surface of the field is leveled so that water and mud collected inside 5, especially on the front side of the flat plate 30 exit rearward from the three-dimensional cutouts 31, 31. Therefore, the leveling performance is improved without the need for water and mud like the conventional leveling plate to protrude from the sides of the leveling plate and the leveling work to be performed many times. The flat plate 30 and the three-dimensional cutouts 31, 31, ... Are not limited to the folding type rotary working machine as in the present embodiment, and can be similarly applied to a non-folding type.

The space between the left and right flat plates 30, 30 is shown in FIG.
A central flat plate 30a shown in FIGS. 3, 4, and 5 is provided. The central flat plate 30a is a flat plate 30, 30.
Long holes 30c, 30c provided in the central flat plate 30a are slidably fitted and supported and mounted on a pair of pins 30b, 30b fixedly installed in the center. Then, the rotary working parts 5 and 5 move in the front-back (horizontal) direction 9 around the hinge parts 8 and 8.
When rotating by 0 degree and moving to the working state and the folding state,
The flat plates 30, 30 rotate about the centers of rotation 30d, 30d, and the central flat plate 30a remains attached to the flat plates 30, 30 as shown in FIGS.
b slides in the long holes 30c, 30c and moves back and forth. When the flat plates 30, 30 shown in FIG. 1 are in the unfolded working state, the central flat plate 30a is also in the working state and the same flattening work as that of the flat plates 30, 30 is performed.

The rotary working parts 5, 5 are hinge parts 8,
8, when it is rotated 90 degrees in the front-rear direction to the working state and the folding state, the transmission systems 4 and 4 extending from the gear box 3 to the left and right sides are provided with dog clutches 32 and 33, respectively. By rotating the parts 5 and 5, the clutch engagement / disengagement operation is automatically performed. At this time, in the folded state as shown in FIG. 6, when moving in the field by the tractor, there is an inconvenience that mud repelled by the tire of the tractor enters the dog clutch 33. Therefore, in conjunction with the rotary operation of the rotary working parts 5 and 5, there are provided covers 34 and 34 which cover the dog clutch 33 in the folded state and remove the cover in the working state.

This cover 34 is fixed to the eccentric support arm 35 as shown in FIGS.
6 is rotatably supported, a pivot contact pin 37 is provided at the tip of the eccentric support arm 35, and the pivot contact pin 37 is brought into contact with the contact portion 38 formed on the hinge portion 8. There is. Further, the cover 34 covers the dog clutch 33 when it is lowered by the weight of the cover 34 itself due to the eccentricity of the eccentric support arm 35 as shown in FIG. 16, and the rotation contact pin 37 is pushed by the contact portion 38. Eccentric support arm 35
The cover is released when is rotated.

When the rotary working parts 5 and 5 are pivoted about the hinge parts 8 and 8 in the front-rear direction to be in the working state shown in FIG. It is pushed by the contact portion 38, the eccentric support arm 35 rotates so as to lift the cover 34, and does not cover the dog clutch 33. Further, when the rotary working parts 5 and 5 are in the folded state as shown in FIG. 6, the rotation contact pin 37 is not pushed by the contact part 38 and the cover 34 is lowered by its own weight. It rotates to cover the dog clutch 33. Therefore, it is possible to prevent the mud from entering the dog clutch 33. Reference numeral 39 is a connecting rope for stably connecting the rear ends when the rotary working parts 5 and 5 are folded as shown in FIG.

An extended flat plate 40 is pivotally attached to the outer ends of the left and right flat plates 30, 30.
The cylinder is bent and extended between a working state and a folded state by the expansion and contraction operation of the piston of the cylinder mechanism 41 that is installed between the flat plates 30 and 30 and the extended flat plate 40.

[0022]

As described above, according to the flat plate of the rotary working machine of the present invention, a pair of left and right plates are provided between the flat plate on both the left and right sides of the central portion where the rotary working part and the flat plate are horizontally folded and unfolded. Since the central flat plate supported by the pin and the long hole in which the pin is slidably inserted is provided,
When the rotary working unit and the flat plate are horizontally folded and unfolded, the central flat plate also moves in the connected state, which makes it easy to handle and allows the flattening work with high accuracy. Further, since the worker does not need to perform the operation of connecting and disconnecting the central flat plate, it is efficient and does not stain his hands.

[Brief description of drawings]

FIG. 1 is a plan view of a working state of a center flat plate according to the present invention.

FIG. 2 is a plan view showing a state of a central flat plate in the middle of folding left and right flat plates.

FIG. 3 is a plan view showing a state of a central flat plate when the left and right flat plates are folded.

FIG. 4 is a plan view showing a state in which a rotary working unit of the rotary working machine is expanded to a working state.

FIG. 5 is a rear view of the same.

FIG. 6 is a plan view showing a state where the rotary working unit is folded.

FIG. 7 is a plan view of a lock state of a work state lock mechanism that locks the rotary working unit in a work state.

FIG. 8 is a plan view showing a state in which the work state lock mechanism is unlocked.

FIG. 9 is a side view of a folding state of a folding lock mechanism that locks a rotary working unit in a folded state.

FIG. 10 is a bottom view of the same portion.

FIG. 11 is a side view showing a state where the lock of the folding lock mechanism is released.

FIG. 12 is a partial perspective view of a flat plate.

FIG. 13 is an explanatory view of the same operation.

FIG. 14 is a plan view of the power transmission unit cover device in a covered state.

FIG. 15 is an explanatory diagram of the same operation.

FIG. 16 is a front view of the power transmission unit cover device in a covered state.

[Explanation of symbols]

1 rotary work machine 2 connection part to tractor 3 gear box 4 transmission system 5 rotary work part 6 central part 6a vertical frame 6b frame pipe 7 link arm 8 hinge part 9 working state lock mechanism 10, 11 lock pin 10a, 11a move Lock pin 12, 13, 23 Shaft 14, 15, 24 Engaging hook 14a, 15a, 24
a inclined surface (cam surface) 16,26 operation lever 17,18 connecting arm 19 connecting rod 20,27 toggle spring 21,29 automatic return lever 22 folding state locking mechanism 30 flat plate 30a central flat plate 30b pin 3
0c long hole 30d center of rotation of flat plate 31 three-dimensional notch 32, 33 dog clutch 34 clutch cover 35 eccentric support arm 36 support tube 37 pivot contact pin 38 contact part 39 connecting rope 40 extended flat plate 41 cylinder mechanism

Claims (1)

[Claims] 1. A tractor is mounted on a rear part of the tractor so as to be able to move up and down through a three-point link mechanism so that power is transmitted from a PTO shaft of the tractor to a gear box of a working machine, and a flat plate is provided behind the rotary working part. In addition, in a rotary working machine in which a rotary working portion and a flat plate extending from the central portion including the gear box to the left and right are horizontally folded from the central portion and expandable, the rotary working portion and the flat plate are horizontally folded. ，
A foldable rotary working machine characterized in that a center flat plate supported by a pair of left and right pins and a long hole in which the pins are slidably inserted is provided between the flat plates on both the left and right sides of the central portion to be deployed. Flat plate.