JP3359961B2 - Extended flat plate of rotary working machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tractor which 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 an extended flat plate of a rotary working machine in which a flat plate is pivotally mounted on a use position and a storage position so that the flat plate can be tilted.

[0002]

2. Description of the Related Art Conventionally, a tractor 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, and power is transmitted from a PTO shaft of the tractor to a gear box of a working machine. In addition, there is known a rotary working machine in which extended equalizing plates are pivotally mounted on both left and right end portions of the equalizing plate so as to be able to be turned upside down between a use position and a storage position. Then, in the extended leveling plate of the conventional rotary working machine, the operator who operates the tractor connects the operating wire from the extended leveling plate to the tractor so that the operator can remotely control the raising / lowering operation of the extended leveling plate while riding on the tractor. Have been extended. There is also an apparatus in which a cylinder mechanism is interposed between the flattening plate and the extended flattening plate so that the extended flattening plate is operated to be turned upside down.

[0003]

In the case of an extended flat plate of the rotary working machine described above, when an operator on a tractor remotely operates via an operation wire, a long operation wire is provided between the extended flat plate and the tractor. Since it must be stretched and operated with a wire, the operation of raising and lowering the extended flat plate is uncertain. Further, when a cylinder mechanism is interposed between the leveling plate and the extended leveling plate to directly raise and lower the extended leveling plate, the extended leveling plate can be rotated only about 90 degrees, When the extended leveling plate is moved upright to the storage position or stored in a warehouse or the like, there is a problem in that the extended leveling plate may be damaged by contact with the extended leveling plate. The present invention has been made to solve the above problems.

[0004]

In order to achieve the above object, the present invention provides: Is vertically movable mounted through a 3-point linkage at the rear of the tractor, together with the gear box 3 of the working machine from the PTO shaft of the tractor so as to transmit power, providing a uniform flat 30 to the rear of the rotary working unit 5, B. In the rotary working machine 1 in which the extended leveling plate 40 is pivotally attached to the left and right end portions of the leveling plate 30 so that the extended leveling plate 40 can be turned over between the use position and the storage position. The extension equalizing flat 40, to the average flat plate 30, Hitoshitaira
A pivot plate 42 provided on a support bracket 41 erected at the end of the plate 30 is rotatably connected to the storage position by 180 degrees from a use position to a storage position, and is extended coaxially with the pivot shaft 42. 4
0 pivoted link member 43 to rotate, the link member 4
3 is connected to a piston 45a of a cylinder mechanism 45 mounted on the leveling plate 30 side, and is extended with the support bracket 41.
Place the extended flat plate 40 between the use position and the upper surface of the plate 40.
It is characterized in that a toggle spring 47 is provided at the storage position for elasticity . C. The link body 43 is bent in a letter shape, and
The link body 43 is expanded and contracted by the piston 45a of the
Is rotated about the pivot 42, the extended flat plate 40
Extended flattening by contacting pin 44 provided on support arm 40a
A contact surface 43 for rotating the plate 40 between the use position and the storage position
a, it is characterized by forming the 43b.

[0005]

With the above arrangement, the extended leveling plate of the rotary working machine of the present invention can be moved from the use position to the storage position around the pivot.
Since it is rotated by 80 degrees, it is almost horizontal at the storage position and is hard to contact with other things, and is not damaged. Further, since the extended flat plate is indirectly rotated by the cylinder mechanism via the link body, it can be surely rotated from the use position to the storage position, and at the use position, the relief 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 denotes a rotary working machine having a long length in the left-right direction and having a crushing and scraping function. A connecting portion 2 for connecting to a tractor connected to a link mechanism is provided, and is attached to the rear of the tractor so as to be able to move up and down. Also, the tractor 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 and the like via an input shaft (not shown).

[0007] Rotary working parts 5 and 5 including transmission systems 4 and 4 extending to the left and right sides from the gear box 3 are provided with link arms 7 from right and left sides of a central portion 6 including the gear box 3.
In the state of being linked by the, it is rotated by 90 degrees in the front-rear (horizontal) direction around the hinge portions 8 and 8 by human power, and is displaced into a working state expanded in the left-right direction and a folded state folded toward the rear of the aircraft. It has become. When the rotary working units 5 and 5 are deployed in the working state, the automatic locking is performed between the left and right side portions of the central portion 6 at the front of the machine body and the rotary working units 5 and 5, and the rotary working units 5 and 5 are folded. Occasionally, the work state lock mechanism 9 that releases the lock manually.
Is provided.

As shown in FIGS. 7 and 8, the working state lock mechanism 9 has shafts 12 and 13 on the central portion 6 side with respect to lock pins 10 and 11 mounted on the rotary working portions 5 and 5 side.
The engagement hooks 14 and 15 pivotally supported via are provided so as to be able to engage (lock) and release (unlock). The operating lever 16 is attached to the engaging hook 14,
, The connecting arms 17 and 18 are fixed coaxially, respectively.
The connecting arms 17 and 18 are connected by a connecting rod 19. The connecting rod 19 passes through the inside of the pipe frame 6b that 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 provided between the engagement hook 14 and the central portion 6, and an automatic return lever 21 is provided on the engagement hook 15.

When the rotary working parts 5 and 5 are deployed to the working state (FIGS. 4 and 5), the working state lock mechanism 9 moves the lock pins 10a and 10a as shown in FIG.
11a is the inclined surface (cam surface) 14 of the engagement hooks 14, 15
a, the engagement hook 14 is pushed up within a range not exceeding the dead center O against the resilience of the toggle spring 20, and simultaneously the engagement hook 15 is rotated so as to be pushed down. To lock automatically. Also, the rotary working units 5, 5
When the is folded, the user holds the operation lever 16 and turns to the imaginary line in FIG. 7, that is, the state in FIG. Then, the engagement hook 15 is rotated via the connection rod 19 and the connection arm 18 together with the rotation of the engagement hook 14 and the connection arm 17, and the lock of the lock pins 10 and 11 is released. Is dead center O
And the engaging hooks 14 and 15 are held in the unlocked state.

When the engaging hooks 14 and 15 are unlocked, the lock pin 11 is engaged with the automatic return lever 21. In this state, the rotary working parts 5 and 15 are engaged.
When the lock 5 is folded, the lock pins 10 and 11 move in the directions of the arrows, the automatic return lever 21 is pushed up, the engagement hook 15 rotates, and the connecting arm 18 and the connecting rod 1 are rotated.
When the toggle spring 20 is rotated, the toggle spring 20 exceeds the dead center 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). The toggle spring 20
Is set so that, while the operation lever 16 is rotated by 45 degrees, it is held in a locked state at 30 degrees and is held in an unlocked state at 15 degrees.

As shown in FIGS. 9 to 11, the center part 6 and the rotary part folded as shown in FIG. 6 correspond to the link arm 7 which is moved by the turning operation when the rotary working parts 5 and 5 are folded. When the rotary working units 5 and 5 are folded by 90 degrees from the unfolded state and turned to the folded state, they are automatically locked between the working units 5 and 5, and the rotary working units 5 and 5 are moved from the folded state of FIG. 4 and 5, a folded state lock mechanism 22 is provided which releases the lock by human power and restores the locked state by the operation of expanding the rotary working parts 5 and 5. .

The folded state lock mechanism 22 pivotally supports the engagement hook 24 to the central portion 6 by a shaft 23, and engages (locks) the engagement hook 24 with a lock pin 25 attached to the link arm 7. Unlocking (lock release) is provided. An operation lever 26 is fixed to the engagement hook 24, and a toggle spring 27 formed of a torsion spring is provided between the engagement hook 24 and the central portion 6. In addition, an inclined surface (cam surface) is formed on the engagement hook 24, an automatic return lever 28 is attached, and a contact pin 29 is provided on the link arm 7.

The folded state lock mechanism 22 is turned from the state where the rotary working parts 5 and 5 are deployed to the working state (FIGS. 4 and 5) to the folded state (FIG. 6) by 90 degrees, and the rotation is performed. The link arm 7 and the lock pin 25 move by the operation, and the lock pin 25 is
4 and slides along the inclined surface (cam surface) 24a to push up the engagement hook 24 within a range not exceeding the dead center O against the elastic force of the toggle spring 27 (see FIG. 9). Status). When the rotary working parts 5 and 5 are deployed to the working state, the operation lever 26 is held and the toggle spring 27 is held.
11 to the state shown in FIG. Then
The locked state of the engagement hook 24 and the lock pin 25 is released, and the toggle spring 27 crosses the dead point on the way, and holds the engagement hook 24 in the unlocked state.

When the engaging 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, 5 are turned to the working state, the link arm 7 is turned on. And the lock pin 25 moves. Due to this movement, the automatic return lever 28 moves the contact pin 2
9, the engaging hook 24 is rotated, and
The toggle spring 27 moves beyond the dead point and returns the folded state lock mechanism 22 to the state shown in FIG. 9, that is, the locked state (lock standby state). Similarly to the toggle spring 20, the toggle spring 27 is set so as to hold the locked state at 30 degrees and the unlocked state at 15 degrees while the operation lever 26 rotates 45 degrees. .

[0015] The rotary working units 5, 5 of the rotary working machine 1
4 and 5, the flat plate 30 is long behind the central portion 6 and the rotary working portions 5 and 5 (rotary working portions) as shown in FIGS. Is provided so as to be divided into two in the vertical direction.
0, a large number of three-dimensional notches 31, 31... Having a swelling in the front-rear direction are formed at predetermined intervals over the entire area in the length direction. In addition, the notch for draining in the conventional flat plate was notched in a planar manner. For this reason, at the time of the scraping work, the water and mud to be leveled have protruded to the side of the leveling plate.

When the three-dimensional cutouts 31, 31... Are formed in the flat plate 30 as described above, when the rotary work machine 1 performs the substitute work, as shown in FIG. 5, the water and mud collected on the front side of the leveling plate 30, particularly, escape from the three-dimensional notches 31, 31. Therefore, the leveling performance is improved without water and mud like the conventional leveling plate protruding from the side of the leveling plate and performing the leveling operation many times. The flat plate 30 and the three-dimensional notches 31, 31... Can be applied not only to the folding rotary working machine as in the present embodiment but also to a non-folding type.

The space between the left and right equalizing plates 30, 30 is shown in FIG.
And a central flat plate 30a shown in FIG. The center leveling plate 30a is supported and mounted by slidably fitting a long hole provided in the center leveling plate 30a to a pair of pins fixed to the leveling plates 30,30. When the rotary working units 5 and 5 rotate 90 degrees in the front-rear (horizontal) direction about the hinges 8 and 8 to move between the working state and the folded state, the leveling plates 30 and 30 rotate about their rotation centers. The pin slides in the elongated hole and moves back and forth while the center leveling plate 30a is mounted on the leveling plates 30, 30. Then, when the leveling plates 30, 30 are in the developed working state, the central leveling plate 30a is also in the working state, and performs the same leveling operation as the leveling plates 30, 30.

The rotary working parts 5, 5 are hinged parts 8,
When the transmission system 4 is rotated 90 degrees in the front-rear direction about the center 8 and 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. The turning on and off of the clutches 5 and 5 automatically performs the on / off operation of the clutch. At this time, when the tractor is folded as shown in FIG. 6, there is a disadvantage that when moving in the field by the tractor, mud thrown up by the tire of the tractor enters the dog clutch 33. Therefore, in conjunction with the rotating operation of the rotary working units 5 and 5, covers 34 and 34 are provided so as to cover the dog clutch 33 in the folded state and to remove the cover in the working state.

The cover 34 is fixed to the eccentric support arm 35 as shown in FIGS.
6 and 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 a contact portion 38 formed on the hinge portion 8. I have. 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 rotating contact pin 37 is pushed by the contact portion 38. Eccentric support arm 35
The cover is released when is turned.

When the rotary working portions 5 and 5 are rotated in the front-rear direction about the hinge portions 8 and 8 to the working state shown in FIG. 4, the cover 34 is brought into contact with the rotating contact pin 37. The eccentric support arm 35 is rotated by lifting the cover 34 because it is pushed by the contact portion 38, and does not cover the dog clutch 33. When the rotary working parts 5 and 5 are folded as shown in FIG. 6, the rotating contact pin 37 is not pushed by the contact part 38 and the cover 34 is lowered by its own weight. To cover the dog clutch 33. For this reason, muddy soil is prevented from entering the dog clutch 33. Reference numeral 39 denotes a connecting rope for stably connecting the rear ends when the rotary working units 5 and 5 are folded as shown in FIG.

At the outer ends of the left and right equalizing plates 30, 30, as shown in detail in FIGS.
0 can rotate the support arm 40a by 180 degrees from the use position (FIG. 1) to the storage position (FIG. 2) from the use position (FIG. 1) to the upper end of the support bracket 41 erected on the end of the flat plate 30 via the pivot 42. Is pivoted to. A link body 43 that is bent coaxially with the pivot 42 and has contact surfaces 43a and 43b that abut on a pin 44 provided on a support arm 40a is pivotally supported. 4
5a are connected. Also, the toggle spring 47 is suspended between the spring bracket 46 which is provided on the lower and upper surface of the extension equalizing flat 40 of the support bracket 41.

When the extended flattening plate 40 performs the crushing work or the scraping work with the rotary working units 5 and 5 in the working state, and performs the flattening work by the flattening plates 30 and 30, as shown in FIG. The piston 45a of the cylinder mechanism 45 is extended and put into a use state, and the leveling work of the outer portions of the leveling plates 30, 30 is performed. At this time, the extended flat plate 40 can rotate 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. In addition, when a large soil reaction force acts on the extended flat plate 40, it can be avoided upward. When storing the extended flat plate 40, the piston 45a of the cylinder mechanism 45 is contracted and rotated to the storage 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 moves beyond the fulcrum and elastically holds the extended flat plate 40 at the storage position.

[0023]

As described above, according to the extended flat plate of the rotary working machine of the present invention, the extended flat plate 40 is
Against 30, the support bra erected on an end portion of the equalizing flat 30
A link body 43 is pivotally connected by a 180-degree rotation from a use position to a storage position via a pivot 42 provided on the bracket 41, and pivots the extended flat plate 40 coaxially with the pivot 42 to pivotally support the link 43. A piston 45a of a cylinder mechanism 45 attached to the leveling plate 30 side is connected to the body 43 , and the support bracket
Between the slot 41 and the upper surface of the extended flat plate 40,
A toggle spring 47 for holding the 40 at the use position and the storage position.
Since the provided, by the expansion and contraction operation of the piston 45a of the cylinder mechanism 45, the toggle spring 47 is rotated 180 degrees smoothly to the retracted position an extension equalizing flat 40 from the use position
It can be bullet lifting, toggle substantially horizontal state in a retracted position
It is held by the spring 47 so that it is hard to come into contact with other objects, and is not damaged. Also, the link body 43 is detached.
The piston 45 of the cylinder mechanism 45
is extended and retracted, and the link body 43 is rotated about the pivot 42.
When it is set, it is provided on the support arm 40a of the extended flat plate 40.
The extended flat plate 40 is brought into contact with the pin 44 and the use position and the storage position
Abutment surfaces 43a and 43b to be rotated with respect to the
Therefore, the extended flat plate 40 is provided with a contact surface 43a of the link body 43,
It is indirectly rotated by the cylinder mechanism 45 via 43b , and opens and closes between the use position and the storage position . At the use position, the relief action by the reaction force of the soil can be performed.

[Brief description of the drawings]

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

FIG. 2 is a side view of a state where the storage device is 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 of the rotary working unit in a folded state.

FIG. 7 is a plan view of a locked state of a working state lock mechanism for locking the rotary working unit in a working state.

FIG. 8 is a plan view showing a state in which a lock of a work state lock mechanism is released.

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

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

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 leveling plate.

FIG. 13 is an explanatory diagram of the operation.

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

FIG. 15 is an explanatory diagram of the operation.

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

[Explanation of symbols]

DESCRIPTION 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 Work state lock mechanism 10, 11 Lock pin 10a, 11a Move Lock pin 12, 13, 23 Shaft 14, 15, 24 Engagement hook 14a, 15a, 24
a Inclined surface (cam surface) 16, 26 Operating lever 17, 18 Linking arm 19 Linking rod 20, 27 Toggle spring 21, 29 Automatic return lever 22 Folding state lock mechanism 30 Flat plate 30a Central flat plate 31 Three-dimensional notch 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 Extended flat plate 40a Support arm 41 Support bracket 42 Axis 43 Link body 43a, 43b Contact surface 44 Pin 45 Cylinder mechanism 45a Piston 46 Spring bracket 47 Toggle spring

Claims (2)

(57) [Claims] 1. A through the three-point linkage at the rear of the tractor vertically movably mounted, so as to transmit power from the PTO shaft of the tractor to a gear box (3) of the working machine, rotary working portion (5) A leveling plate (30) is provided at the rear, and extended leveling plates (4 ) are provided on both left and right ends of the leveling plate (30).
0) in the rotary working machine (1) pivotally attached to the use position and the storage position so that the extended flat plate (40) can be moved up and down with respect to the flat plate (30) .
A support bracket (4) erected at the end of the leveling plate (30)
The pivot (42) is pivotally connected by 180 degrees from a use position to a storage position via a pivot (42) provided in 1 ).
A link body (4 ) for rotating the extended flat plate (40) coaxially with
3) pivotally link the link body (43) to the flat plate (30).
A piston cylinder mechanism mounted on the side (45) (45
a) , connecting the support bracket (41) with the extended leveling
Use an extended flat plate (40) between the upper surface of the plate (40)
An extended leveling plate for a rotary working machine, wherein a toggle spring (47) is provided at a position and a storage position . 2. The link body (43) is bent in a square shape.
The piston (45a) of the cylinder mechanism (45)
Turn the link body (43) around the pivot (42) by expanding and contracting it.
When moved, the support arm (40) of the extended flat plate (40) is moved.
a) abutting the pin (44) provided in
0) is rotated between the use position and the storage position.
a, 43b) is formed.
An extended flat plate of the rotary working machine as described .