JP3573577B2 - Leveler control mechanism of agricultural work machine - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a mechanism for locking / unlocking a leveler pivotally attached to a rear portion of an apron of a rotary agricultural working machine between a soiling state and a leveling state by power.
[0002]
[Prior art]
Conventionally, a front portion of an apron is pivotally mounted on a rear portion of a shield cover which is attached to a rear portion of a tractor via a top mast and a lower link connecting portion so as to be able to move up and down, and is fixed so as to cover above a working rotor. Japanese Unexamined Patent Publication No. Hei 6-335304 discloses an agricultural working machine in which a front portion of a leveler is pivotally attached to a rear portion of an apron, and the leveler can be switched between a soiled state in which the leveler is locked by a power operation mechanism and a leveled state in which the lock is released. It is disclosed in the gazette.
[0003]
The power operation mechanism rotatably supports, on a pair of left and right brackets mounted on the top mast, a rotatable body having an engaging portion for engaging and disengaging the locking projection of the support rod. A support body, which supports a rotatable support rod through which a support rod is inserted and retractably supported, is rotatably supported via a support shaft, and the bracket has an engagement recessed portion which engages with the support shaft in a detachable manner. In the prior art, the engaging body is rotatably supported, a forward / reverse rotation motor for rotating the engaging body is provided, and a remote control switch for controlling the motor is provided.
[0004]
[Problems to be solved by the invention]
As described above, since the mechanism for operating the known leveler by power is provided so as to protrude from the top mast, there is a problem that the leveler is easily damaged when it comes into contact with other things. Further, there is a problem that not only the operation mechanism is complicated and the weight becomes heavy but also the production cost is increased.
The present invention has been made to solve the above problems.
[0005]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention relates to a shield cover which is mounted on a rear portion of a tractor via a top mast and a lower link connecting portion so as to be able to ascend and descend, and is fixed so as to cover an upper portion of a working rotor. The front part of the apron is pivotally attached, the front part of the leveler is pivotally attached to the rear part of the apron, and the leveler can be switched between a soiled state where the leveler is locked by a power operation mechanism and a leveled state where the lock is released. In agricultural work machines,
The power operating mechanism is supported within the width of a top mast, with a support arm pivotally supporting the upper end of a rod, the lower end of which is pivotally supported on the upper surface of the leveler, and the base end pivotally supported by the body frame. A link arm that is connected to a rotating plate that rotates forward and backward in the front-rear direction by a reverse rotation motor, and that moves up and down by forward and reverse rotation of the rotating plate; and a link arm that is pivotally supported by the body frame and is connected to the link arm. A lock / unlock plate that rotates in a predetermined range by movement, and a lock hole that is formed in the plate and engages / disengages a lock pin provided in the support arm by rotation of the plate. Features.
[0006]
[Action]
With the above configuration, the leveler control mechanism of the agricultural working machine of the present invention is configured such that when the leveler is switched from the soiling state to the leveling state or from the leveling state to the soiling state by the power operating mechanism, the rotary agricultural working machine is lifted and the leveler is moved to the field. In a state of being lifted from the surface, the operator can freely switch by remote control while riding on the tractor, and the switching can be reliably performed with a simple configuration. In addition, since the power operation mechanism is supported within the width of the top mast, the power operation mechanism is not damaged when it comes into contact with other components, and can be produced and provided at low cost with a simple configuration. Furthermore, it can be easily attached to existing farm work machines.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be specifically described with reference to the accompanying drawings.
[0008]
In FIG. 1, reference numeral 1 denotes a rotary scraper (agricultural work machine) having a predetermined length in the left-right direction, which is formed by a well-known top link and a lower link provided at the front of a tractor (not shown). The three-point link mechanism is provided with a top mast 2 and a lower link connecting portion 3 which are connected to be able to move up and down. This rotary scraper 1 is almost automatically attached to and detached from the tractor, and is provided from the PTO shaft of the tractor via a universal joint, a transmission shaft, and the like, at a central portion on the front side of the main body frame 4 also serving as a transmission frame. Power is transmitted to the transmission gearbox via the input shaft.
[0009]
The main body frame 4 extends to the left and right sides from the gear box, and a transmission case 5 also serving as a side plate is fixedly provided at one end thereof, and a support frame (not shown) also serving as a side plate is fixedly provided so as to face the transmission case 5 at the other end. Have been. Between the transmission case 5 and the lower end of the support frame, a well-known work rotor 6 having a function of crushing and scraping is mounted. The upper part of the work rotor 6 is covered by a shield cover 7 supported by the main body frame 4, and at the rear end of the shield cover 7, the upper end of an apron 8 pivotally mounted with a leveler 9 at the rear end. Are pivotally attached via a pivot 10 so as to be rotatable in the vertical direction. The apron 8 is pivotally supported via a center pivot 11 so as to be rotatable in the left-right direction.
[0010]
The rotary substitute scraper 1 is provided with a stand (not shown) for keeping the posture constant when the rotary substitute scraper 1 is attached to and detached from the tractor. The stand is detachably attached to a stand holder 12 provided with a connecting portion of the stand in the transmission case 5, and has a use position where the stand is supported downward and a non-use position where the stand is supported by being rotated 180 degrees upward. And can be fixed to.
[0011]
The leveler 9 is pivotally attached to the rear end of the apron 8 by a pivot 13, and is locked by being pivoted downward by a power operating mechanism 14 (a virtual line state in FIG. 1). The state can be switched to the leveled state (solid line state in FIG. 1) in which the lock is released.
[0012]
The power operating mechanism 14 pivotally supports the upper end of a rod 16, the lower end of which is pivotally supported by a bracket 15 provided on the upper surface of the leveler 9 at the center in the longitudinal direction, at the distal end, and pivots the proximal end of the rod 16 to the main body frame 4. A support arm 17 and a rotating disk 19 supported by a forward / reverse rotation motor 18 supported within the width of the top mast 2 also shown in FIG. A link arm 21 that is connected and moves up and down by forward and reverse rotation of the rotating disk 19 is supported by a pair of left and right support plates 22 projecting rearward from the main body frame 4 via a shaft 23. A lock / unlock plate 24 which is connected to the link arm 21 and rotates within a predetermined range around a shaft 23 by the vertical movement of the link arm 21; and a support arm formed on the plate 24, A lock hole 26 for releasing the lock pin 25 and the engagement and provided on arm 17, and is made of.
[0013]
When the lock / unlock plate 24 is rotated to the unlock side continuously with the lock hole 26, the support arm 17 and the rod are in sliding contact with the lock pin 25 in a cam shape. A convex portion 27 that pushes the leveler 9 up through the flat 16 is formed. Further, the support plate 22 is provided with a stop pin 28 that restricts further rotation in a state where the lock / unlock plate 24 is rotated and the leveler 9 is pushed up by the convex portion 27 to an even state. . In this state, the driving of the motor 18 is stopped.
[0014]
When the leveler 9 is switched from the leveling state to the soiling state or from the soiling state to the leveling state, the rotary substitute scraper 1 is operated by the three-point link mechanism while the work is stopped, and at least the leveler 9 is moved from the field scene. Lift to the left. In this state, when the forward / reverse rotation motor 18 is driven by a switch provided near the driver's seat of the tractor to rotate the rotating disk 19 and move the distal end of the link arm 21 to the solid line position in the drawing, the link arm 21 The lock / unlock plate 24 pivots to the solid line position via the, and the protrusion 27 pushes the leveler 9 up through the support arm 17 and the rod 16 to an even state while slidingly contacting the lock pin 25 in a cam shape. At this time, the rotation of the lock / unlock plate 24 is restricted by contacting the stop pin 28, and the driving of the forward / reverse rotation motor 18 is also stopped.
[0015]
When the leveler 9 is switched from the leveling state to the crushing state, the forward / reverse rotation motor 18 is rotated in the reverse direction with the rotary scraper 1 lifted to rotate the rotating disk 19, and the tip of the link arm 21 is moved. When the lock / unlock plate 24 is rotated to the imaginary line position through the link arm 21 when the imaginary line position is moved to the imaginary line position in the drawing, the leveler 9 turns downward around the pivot shaft 13 by its own weight in the process. By rotating, the lock pin 25 is engaged with the lock hole 26 to be locked, the leveler 9 is fixed in the soil closing state, and the driving of the forward / reverse rotation motor 18 is stopped. In this state, the rotary scraper 1 is lowered, and the leveling operation is performed by the leveler 9.
[0016]
In the rotary scraper 1 having such a configuration, when performing the crushing and scraping work, the top mast 2 and the lower link connecting portion 3 are attached to the tractor via the three-point link mechanism and introduced into the paddy field. Do the work. The rotary scraper 1 receives power from the tractor, is shifted by a gear box, is transmitted from the main body frame 4 to the transmission case 5, and drives the work rotor 6 to perform crushing and scraping work. The soil crushed or scraped by the work rotor 6 is guided by the shield cover 7 and the apron 8 and is released to the rear of the work rotor 6, and is leveled by the apron 8 and the leveler 9.
[0017]
When the rotary substitute machine 1 is mounted on the tractor, when it is detached from the tractor, when it is loaded on the carrier of a transport vehicle, when it is stored in a warehouse, etc., the stand is mounted on the stand holder 12 in a use state. use. When the stand is unnecessary, it is removed from the stand holder 12. In addition, the work can be performed by rotating the stand 180 degrees upward from the use position and holding the stand at the non-use position.
[0018]
When the crushing and scraping work is performed by the rotary scraper 1, the apron 8 and the leveler 9 initially rotate while moving vertically and horizontally via the pivot shaft 10 and the center pivot 11 by their own weight. Perform leveling work. At this time, the leveler 9 is in the position indicated by the solid line in the drawing, and freely rotates up and down around the pivot shaft 13 to perform the leveling operation. The release plate 24 is restricted at a position in contact with the convex portion 27, and does not rotate downward more than necessary.
[0019]
When the scraping work by the rotary scraping machine 1 proceeds and leveling of the entire scratching is performed, for example, when moving the soil in the high part of the ridge to the lower side, the leveling work is interrupted. Then, the rotary scraper 1 is lifted, and the forward / reverse rotation motor 18 is driven by a switch to rotate the rotary disk 19. Then, the distal end of the link arm 21 moves to the position of the imaginary line in the drawing, and the lock / unlock plate 24 rotates to the position of the imaginary line via the link arm 21, and in the process, the leveler 9 pivots due to its own weight. Rotating downward around the shaft 13, the lock pin 25 is engaged with the lock hole 26 to be locked, the leveler 9 is fixed in the soil approaching state, and the drive of the forward / reverse rotation motor 18 is stopped. In this state, the rotary scraper 1 is lowered, and the leveling operation is performed by the leveler 9.
[0020]
【The invention's effect】
As described above, according to the leveler control mechanism of the agricultural working machine of the present invention, the power operating mechanism pivotally supports the upper end of the rod whose lower end is pivotally supported on the upper surface of the leveler at the distal end, and the base end is the main body frame. A supporting arm pivotally supported by the top mast, a link arm supported within the width of the top mast, linked to a rotating plate that rotates forward and backward in the front-rear direction by a forward and reverse rotating motor, and moved up and down by forward and reverse rotation of the rotating plate; A lock / unlock plate pivotally supported by a frame and connected to the link arm and pivoting within a predetermined range by vertical movement of the link arm; and a lock / unlock plate formed on the plate and provided on the support arm by rotation of the plate. Because the lock pin and the lock hole that engages and disengages the lock pin, the power operation mechanism moves the leveler from the soiled state to the leveled state, or from the leveled state to the leveled state. When changing, the worker can freely switch by remote control while riding on the tractor with the rotary agricultural machine lifted and the leveler lifted from the field scene, and the switching can be reliably performed with a simple configuration. . In addition, since the power operation mechanism is supported within the width of the top mast, the power operation mechanism is not damaged when it comes into contact with anything else on the top mast. , Can be provided. Furthermore, it can be easily mounted on existing agricultural work machines.
[Brief description of the drawings]
FIG. 1 is a partially sectional side view of a rotary scraper (agricultural work machine) to which the present invention is applied.
FIG. 2 is an arrow view of a portion A in FIG.
[Explanation of symbols]
1 rotary scraper (agricultural work machine)
2 Top mast 3 Lower link connecting part 4 Body frame 5 Transmission case 6 Work rotor 7 Shield cover 8 Apron 9 Leveler 10 Pivot shaft 11 Center pivot 12 Stand holder 13 Pivot shaft 14 Power operation mechanism 15 Bracket 16 Rod 17 Support Arm 18 Forward / reverse rotation motor 19 Rotating disk 20 Pivot pin 21 Link arm 22 Support plate 23 Axis 24 Leveler lock / unlock plate 25 Lock pin 26 Lock hole 27 Convex portion 28 Stop pin

Claims (1)

The front of the apron is pivotally attached to the rear of the shield cover, which is attached to the rear of the tractor via a top mast and a lower link connecting portion so as to be able to move up and down, and is fixed so as to cover above the working rotor. Agricultural work machines that pivotally attach the front part of the leveler to the rear part, and switch the state of the leveler between the soiled state in which the leveler is locked by the power operating mechanism and the leveled state in which the lock is released,
The power operating mechanism is supported within the width of a top mast, with a support arm pivotally supporting the upper end of a rod, the lower end of which is pivotally supported on the upper surface of the leveler, and the base end pivotally supported by the body frame. A link arm that is connected to a rotating plate that rotates forward and backward in the front-rear direction by a reverse rotation motor, and that moves up and down by forward and reverse rotation of the rotating plate; and a link arm that is pivotally supported by the body frame and is connected to the link arm. A lock / unlock plate that rotates in a predetermined range by movement, and a lock hole that is formed in the plate and engages / disengages a lock pin provided in the support arm by rotation of the plate. Characteristic leveler control mechanism of agricultural work machine.

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