JPH07155004A - Extensible leveling plate for rotary operator - Google Patents

Abstract

PURPOSE:To provide an extensible leveling plate which is not damaged on storing by fitting the extended leveling plate to the leveling plate so as to be turnable around the shaft from the working position to the resting or storing position and setting the linker for connecting the piston to the rotating shaft on the same axis. 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 extended leveling plates 30 is set to the rear of the rotary operator. At the same time, the extended leveling plates 40 are attached to both ends of the right and left leveling plates 30 so that the plates 40 may be turnable from the working position to the resting position. Further, the extended leveling plates are fitted to the leveling plates 30, respectively, so that the plates 40 may be rotatable around the shafts 42 by 180 deg. from the working position to the resting position and brought into contact with the pins 44 fitted to the supporting arm 40 bent in V shape on the same axis as that of the shaft 42 to support the linker 43 rotating the plate 40 and the tinker is connected to the piston 45a in the cylinder mechanism 45 so that the extended leveling plate may not be damaged, when its position is turned to resting.

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 so as to be able to move up and down through a three-point link mechanism, has a flat plate provided behind a rotary working portion, and has an extended flat plate at both left and right end portions of the flat plate. TECHNICAL FIELD The present invention relates to an extended flat plate for a rotary working machine in which a flat plate is pivotally mounted so as to be tiltable between a use position and a storage position.

[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 extended flat plates are pivotally attached to the left and right ends of the flat plate so as to be able to be tilted between a use position and a storage position. Then, in this conventional extension flat plate of the rotary working machine, an operator wire for operating the tractor allows the operator to operate the extension wire from the extension flat plate to the tractor so that the operator can remotely operate the extension flat plate when the operator is on the tractor. It is extended. Further, there is also a cylinder in which a cylinder mechanism is interposed between the flat plate and the extended flat plate so that the extended flat plate can be tilted up and down.

[0003]

In the extended flat plate of the rotary working machine described above, when an operator on the tractor is remotely operated via the operating wire, a long operating wire is provided between the extended flat plate and the tractor. Since it had to be stretched and operated with a wire, the operation of raising and lowering the extended flat plate was uncertain. Further, when the cylinder mechanism is interposed between the flat plate and the extended flat plate to directly raise and lower the flat plate, the extended flat plate can be rotated only about 90 degrees. When the extended uniform plate is moved to the storage position in a standing state, or is stored in a warehouse or the like, there is a problem that another object may come into contact with the standing extended flat plate and be damaged. 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. In the rotary working machine in which a flat plate is provided at the rear of the rotary working part, and the extended flat plate is pivotably attached to both left and right end portions of the flat plate, the extended flat plate is a flat plate. , A link body that is pivotally attached through a pivot from the use position to the storage position by 180 degrees and that pivots the extension flat plate coaxially with the pivot, pivotally supports the link body of the cylinder mechanism. It is characterized by connecting pistons.

[0005]

With the above structure, the extended flat plate of the rotary working machine according to the present invention has a structure in which the extended position from the use position to the storage position is centered around the pivot.
Since it rotates by 80 degrees, it becomes almost horizontal at the storage position, and it is difficult for it to come into contact with other objects, and it is not damaged. Further, since the extended flat plate is indirectly rotated by the cylinder mechanism via the link body, it can be reliably rotated from the use position to the storage position, and at the use position, the escape action by the reaction force of the soil is performed.

[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.
Further, the central flat plate 30a shown in FIG. 5 is provided. The central flat plate 30a is supported and mounted by slidably inserting the long holes provided in the central flat plate 30a into a pair of pins fixed to the flat plates 30, 30. When the rotary working parts 5 and 5 rotate 90 degrees in the front-rear (horizontal) direction about the hinge parts 8 and 8 to move to the working state and the folding state, the flat plates 30 and 30 are centered on the rotation center. When the center flat plate 30a is attached to the flat plates 30 and 30, the pin slides in the long hole and moves back and forth. Then, when the flat plates 30, 30 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.

At the outer ends of the left and right flat plates 30, 30, as shown in detail in FIGS.
0 can rotate its support arm 40a by 180 degrees from a use position (FIG. 1) to a storage position (FIG. 2) via a pivot 42 on an upper end of a support bracket 41 erected on the end of the flat plate 30. Is pivotally attached to. A link body 43 is bent coaxially with the pivot 42 and has contact surfaces 43a and 43b for contacting a pin 44 provided on a support arm 40a. The link body 43 is supported by the piston 43 of the cylinder mechanism 45. Four
5a are connected. A toggle spring 47 is suspended between the lower portion of the support bracket 41 and a spring bracket 46 provided on the surface of the extended flat plate 40.

The extended flat plate 40 performs the crushing work or the scraping work with the rotary working parts 5, 5 in the working state, and when the flat plate 30, 30 carries out the flattening work, as shown in FIG. The piston 45a of the cylinder mechanism 45 is extended to be in a use state, and the outer side portions of the flat plates 30, 30 are flattened. At this time, the extension flat plate 40 is rotatable until the pin 44 provided on the support arm 40a is in contact with the contact surface 43b of the link body 43 by the spring action of the toggle spring 47, and is in contact with the contact surface 43a. Therefore, when a large soil reaction force acts on the extension and level plate 40, it can be avoided upward. When accommodating the extended flat plate 40, the piston 45a of the cylinder mechanism 45 is contracted and rotated to the accommodating position as shown in FIG. At this time, the pin 44 is in contact with the contact surface 43a of the link body 43, and the toggle spring 47 elastically holds the extended flat plate 40 in the storage position after the fulcrum is exceeded.

[0023]

As described above, according to the extended flat plate of the rotary working machine of the present invention, the extended flat plate can be rotated 180 degrees with respect to the flat plate from the use position to the storage position via the pivot. A link body that pivotally connects the extension flat plate to the pivot shaft coaxially with the above-mentioned axis and the piston of the cylinder mechanism is connected to this link body. It can be smoothly rotated 180 degrees from the use position to the storage position, and is in a substantially horizontal state at the storage position, which makes it difficult to contact with other things and is not damaged. Further, the extended flat plate is indirectly rotated by the cylinder mechanism via the link body, and at the use position, it is possible to perform the escape action by the reaction force of the soil.

[Brief description of drawings]

FIG. 1 is a side view of an extended flat plate portion according to the present invention.

FIG. 2 is a side view showing a state of being folded to the storage position.

FIG. 3 is a plan view of a link body.

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 operating 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 31 three-dimensional cutout 32 , 33 dog clutch 34 clutch cover 35 eccentric support arm 36 support cylinder 37 rotation contact pin 38 contact part 39 connecting rope 40 extension flat plate 40a support arm 41 support bracket 42 pivot 43 link body 43a, 43b contact surface 44 pin 45 Cylinder mechanism 45a Piston 46 Spring bracket 47 Toggle spring

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. At the same time, in a rotary working machine in which extended flat plates are pivotally attached to the use position and the retracted position at both left and right ends of the flat plate, the extended flat plate is used for the flat plate via a pivot. It is characterized in that a link body pivotally mounted so as to be rotatable by 180 degrees from a position to a stored position is pivotally supported coaxially with the pivot shaft, and a piston of a cylinder mechanism is connected to the link body. Extended flat plate for rotary machines.