JPH1098910A - Leveler control mechanism for farm work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dissolve the problem that a well-known mechanism for operating a leveler by driving power is easily damaged at the time of contact with other things since it is provided by projecting on a top mast. SOLUTION: A driving power operation mechanism 14 is constituted of a supporting arm 17 for pivotally supporting the upper end of a rod 16 whose lower end is pivotally supported to the upper surface of the leveler 9 and pivotally supporting a base end part to a main body frame 4, a link arm 21 supported within the width of the top mast 2, connected to a rotary plate 19 normally and reversely rotated in back and forth directions by a normal and reverse rotation motor 18 and vertically moved by the normal and reverse rotation of the rotary plate 19, a locking/unlocking plate 24 pivotally supported to the main body frame 4, connected to the link arm 21 and turned in a prescribed range by the vertical movement of the link arm 21 and a lock hole 26 to be engaged and disengaged to/from a lock pin 25 attached on the supporting arm 17 by the turning of the plate 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. 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 machine between a soiled state and a leveled state by power.

[0002]

2. Description of the Related Art Conventionally, a front part of an apron is attached to a rear part of a tractor via a top mast and a lower link connecting part so as to be able to ascend and descend and fixed so as to cover an upper part of a working rotor. An agricultural working machine that pivotally attaches a front portion of a leveler to a rear portion of the apron and that can switch between the soiling state in which the leveler is locked by a power operation mechanism and the leveling state in which the locker is unlocked, is a special feature. Kaihei 6-
No. 335304.

The power operating mechanism includes a pair of left and right brackets mounted on a top mast, which rotatably supports a rotating body having an engaging portion for engaging and disengaging a locking projection of a support rod. A support member rotatably supported via a support shaft and having a support rod inserted and supported so as to be able to advance and retreat to the rotating body,
The bracket has a forward / reverse rotation motor for rotatably supporting an engagement body having an engagement concave portion which is detachably engaged with the support shaft and rotating the engagement body, and controls the motor. In this case, a remote control switch was provided.

[0004]

As described above, the well-known mechanism for operating the leveler by power is protrudingly provided on the top mast, and is liable to be damaged when it comes into contact with other things. There was a point. Further, there is a problem that not only the operation mechanism is complicated and the weight becomes heavy but also the production cost becomes high. The present invention has been made to solve the above problems.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is arranged so that the tractor can be lifted and lowered via a top mast and a lower link connecting portion at a rear portion of a tractor so as to cover an upper portion of a working rotor. The front part of the apron is pivotally attached to the rear part of the shield cover fixed to the apron, and the front part of the leveler is pivotally attached to the rear part of the apron. In the agricultural work machine capable of being switched to the leveling state, the power operating mechanism is supported by pivoting the upper end of the rod, the lower end of which is pivotally supported on the upper surface of the leveler, to the tip, and the base end to the main body frame. The arm and the link arm, which is supported within the width of the top mast, is linked to the rotating plate that rotates forward and backward in the front-rear direction by the forward and reverse rotating motor, and moves up and down by the forward and reverse rotation of the rotating plate, and the body frame A lock / unlock plate that is supported and is linked to the link arm and that rotates in a predetermined range by up and down movement of the link arm; and a lock pin formed on the plate and provided on the support arm by rotation of the plate. And a lock hole for engagement / disengagement.

[0006]

According to the above construction, the leveler control mechanism of the agricultural working machine of the present invention raises the rotary agricultural working machine when switching the leveler from the soiling state to the leveling state or from the leveling state to the soiling state by the power operating mechanism. In a state where the leveler is lifted from the field scene, 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 mounted on existing farm work machines.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described.
This will be specifically described with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a rotary scraper (agricultural work machine) having a predetermined length in the left-right direction, and a well-known top link and a lower link provided at a front portion of a rotary tractor at a rear portion of a tractor (not shown). A top mast 2 and a lower link connecting portion 3 which are connected so as to be able to move up and down are provided in a three-point link mechanism including a link. The rotary scraper 1 is attached to and detached from the tractor almost automatically, and the PT of the tractor is removed.
Power is transmitted from the O-axis via an input shaft via a universal joint, a transmission shaft, and the like, to a transmission gearbox provided at the front center of the main body frame 4 also serving as a transmission frame.

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 opposed to the transmission case 5 at the other end. It is fixed. Between the transmission case 5 and the lower end of the support frame,
A well-known work rotor 6 having a crushing and scraping function is mounted on a shaft. 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 having a leveler 9 pivotally mounted at the rear end position. Are pivotally connected via a pivot shaft 10 so as to be rotatable vertically. The apron 8 is pivotally supported via a center pivot 11 so as to be rotatable in the left-right direction.

The rotary scraper 1 includes a rotary scraper 1
A stand (not shown) is provided to keep the posture constant when the is mounted on and dismounted from the tractor. The stand is detachably mounted 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.

The above-mentioned leveler 9 is pivotally attached to the rear end of the apron 8 by a pivot shaft 13, and is rotated downward by the power operating mechanism 14 to lock the soil (the virtual line state in FIG. 1). ) And a flattened state (solid line state in FIG. 1) in which the lock is released.

The power operation mechanism 14 pivotally supports the upper end of a rod 16 whose lower end is pivotally supported by a bracket 15 provided on the upper surface of the leveler 9 at the center in the longitudinal direction, and the base end of the rod 16 to the main body frame 4. A support arm 17 pivotally supported, and a forward / reverse rotation motor 18 supported within the width of the top mast 2 also shown in FIG.
The rotating disk 19 is connected via a pivot pin 20 to a rotating disk 19 supported to rotate forward and backward in the front-rear direction.
A pair of left and right support plates 22 projecting rearward from the main body frame 4;
A lock / unlock plate 24 that is pivotally supported between shafts 22 via a shaft 23, is connected to the link arm 21, and rotates within a predetermined range around the shaft 23 by the vertical movement of the link arm 21; The lock arm 26 is formed by a lock pin 25 provided on the support arm 17 by the rotation of the plate 24 and a lock hole 26 which is engaged / disengaged.

When the lock / unlock plate 24 is rotated to the unlocking side continuously with the lock hole 26, the lock / unlock plate 24 supports the lock pin 25 while slidingly contacting the lock pin 25 in a cam shape. 17, rod 1
A convex portion 27 that pushes the leveler 9 to a uniform state through the convex portion 27
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 a level state. . In this state, the driving of the motor 18 is stopped.

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 scraper 1 is turned on by the three-point link mechanism while the work is stopped, and at least the leveler 9 is turned on. Lift up away from the field scene. 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 position indicated by the solid line in FIG. The lock / unlock plate 24 pivots to the solid line position via the, and the convex portion 27 slidably contacts the lock pin 25 in a cam-like manner to push the leveler 9 up through the support arm 17 and the rod 16 to a uniform state. 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.

In order to switch the leveler 9 from the leveling state to the soil closing state, the forward / reverse rotation motor 18 is rotated in reverse with the rotary scraper 1 lifted to rotate the rotating disk 19, and the link arm 21 is rotated. When the tip is moved to the position of the imaginary line in the drawing, it is locked via the link arm 21.
The lock release plate 24 rotates to the imaginary line position, and in the process, the leveler 9 rotates downward about the pivot shaft 13 by its own weight, and the lock pin 25 is engaged with the lock hole 26 to lock. Then, 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.

In the rotary scraping machine 1 having such a configuration, when crushing and scraping work is performed, the top mast 2 and the lower link connecting portion 3 are connected to the tractor via a three-point link mechanism.
Is installed and introduced into the paddy field for work. Rotary scraper 1 receives power from a tractor, is shifted by a gear box, and is transmitted from main body frame 4 to transmission case 5,
The work rotor 6 is driven to perform crushing and scraping work. The soil crushed and scraped by the work rotor 6 is guided by the shield cover 7 and the apron 8, released to the rear of the work rotor 6, and leveled by the apron 8 and the leveler 9.

When the rotary scraper 1 is mounted on the tractor, when it is detached from the tractor, when it is loaded on the carrier of a transport vehicle and transported, or when it is stored in a warehouse, the stand is used by the stand holder 12. Attach and use. When the stand is unnecessary, it is removed from the stand holder 12. Further, 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.

When crushing and scraping work is performed by the rotary scraper 1, an apron 8 and a leveler 9 are initially provided.
Is a pivot shaft 10 and a center pivot 11 due to its own weight.
Leveling work is performed while rotating in the vertical and horizontal directions via the. At this time, the leveler 9 is in the position indicated by the solid line in the drawing, and the leveler 9 is freely rotated 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 projection 27 and does not rotate downward more than necessary.

When the scraping operation by the rotary scraping machine 1 proceeds to level the entire surface of the scraping, for example, when the soil in the high part of the ridge is moved to the lower side, the leveling work is performed. Is stopped, the rotary scraper 1 is lifted, and the forward / reverse rotation motor 18 is driven by the switch to rotate the rotating disk 19. Then, the tip 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,
In this process, the leveler 9 rotates downward about the pivot shaft 13 by its own weight, and the lock pin 2 is inserted into the lock hole 26.
5 is engaged and 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.

[0020]

As described above, according to the leveler control mechanism of the agricultural working machine of the present invention, the power operating mechanism is pivotally supported on the upper end of the rod, the lower end of which is pivotally supported on the upper surface of the leveler. A support arm whose end is pivotally supported by the main body frame and a rotating plate that is supported within the width of the top mast and that rotates forward and backward in the front-rear direction by a forward and reverse rotation motor, and moves up and down by forward and reverse rotation of the rotating plate. A link arm, a lock / unlock plate pivotally supported by the body frame and connected to the link arm, and pivoting within a predetermined range by a vertical movement of the link arm; and Engage with the lock pin provided on the support arm.
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 work machine is lifted and the leveler is lifted from the field scene. In the lifted state, 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 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 rotary scraper (agricultural work machine) to which the present invention is applied.
It is the side view which carried out the one part cross section.

FIG. 2 is an arrow view of a portion A in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotary scraper (agricultural work machine) 2 Top mast 3 Lower link connection part 4 Main 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 Shaft 24 Leveler lock / unlock plate 25 Lock pin 26 Lock hole 27 Convex portion 28 Stop pin

Claims (1)

[Claims] 1. A front part of an apron is pivotally attached to a rear part of a shield cover which is mounted on a rear part of a tractor via a top mast and a lower link connecting part so as to be able to move up and down, and is fixed so as to cover an upper part of a working rotor. The agricultural working machine further comprises a front part of a leveler pivotally attached to a rear part of the apron, and the leveler can be switched between a soil-closing state in which the leveler is locked by a power operation mechanism and a leveling state in which the leveler is unlocked. The mechanism includes a support arm that pivotally supports the upper end of the rod, the lower end of which is pivotally supported on the upper surface of the leveler, and the base end of which is pivotally supported by the main body frame. A link arm that is connected to a rotating plate that rotates forward and backward in the front-rear direction, and moves up and down by forward and reverse rotation of the rotating plate; and a link that is pivotally supported by the main body frame and is connected to the link arm. And lock unlocking plate rotates in a predetermined range by the vertical movement of the over arm, formed in the plate, and the locking holes for releasing the lock pin and the engagement and provided on the support arm by the rotation of the plate,
A leveler control mechanism for an agricultural work machine, comprising: