JP2722399B2 - Farm work machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an agricultural work machine mounted on a tractor and having left and right crushing portions having pressure-reducing plates that can be folded rearward.

[0002]

2. Description of the Related Art As an agricultural working machine having a device for folding a working section such as a crushing section, an "agricultural working machine" described in Japanese Utility Model Publication No. 7-11528 is known. This agricultural work machine is composed of a machine frame having a transmission that rotatably projects the input shaft toward the front and also rotatably projects both ends of the output shaft toward the left and right. It has a rotatable drive shaft that is rotatably connected in the horizontal direction by a vertical connection pin and is driven by an output from the output shaft, and is rotatably driven by the output from the drive shaft and has a plowing depth. Left and right working machines having the same rotary working body, one clutch claw body fixed to both ends of the output shaft of the machine frame, and the inner ends of the drive shafts of the left and right working machines, respectively. A clutch having the other clutch claw pair engaged and disengaged with respect to the one clutch claw body, and connected between the rear portion of the machine frame and the left and right working machines with the left and right connection pins as pivot centers Left and right A cylinder device for horizontally displacing the machine so as to horizontally protrude to the left and right portions of the machine frame and displacing the machine so as to protrude parallel to the rear of the machine frame and to attach and detach the left and right clutches. Agricultural work machine ".

[0003] The "agricultural work machine" is configured such that "when the left and right work machines are rotated toward the rear of the machine frame around the vertical connecting pins by the cylinder device at the time of non-work, the clutch is connected to the output shaft by the clutch. The connection with the left and right drive shafts is automatically cut off, and the left and right working machines can be easily set to protrude parallel to the rear of the machine frame with the connecting pin as the center. It is possible to reduce the width of the left and right sides reliably and reduce the size of the left and right sides as compared to the time of work, to surely solve the problem of traffic obstruction, and to easily store the vehicle in the hangar. " .

[0004]

However, in the agricultural working machine of the invention described in the above prior art, the folding device has a pair of right and left hydraulic cylinders as a means for automatically folding a horizontally long soil breaking work body rearward. And a hydraulic cylinder for controlling a free state and a locked state is disposed on the suspension of the second leveling plate, and each is controlled by operating a hydraulic lever.

In such a configuration, when the operator rides on the tractor and drives the tractor, the operator operates the hydraulic operating lever from the driver's seat to fold the crushed soil work body, to release the pressure-reducing plate, and to lock the crusher. Operation must be controlled.

However, in the case where the hydraulic hose is mounted on a tractor of a cabin specification which has begun to spread in recent years, there has been a problem that the handling and disconnection of the hydraulic hose are very troublesome.

Further, when the left and right pressure reduction plates are folded in a free state, the absolute width at the time of folding is widened, and there is a disadvantage that the upper and lower vibration plates are unstablely vibrated during movement.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and disadvantages, and to provide an agricultural working machine in which a folding operation is safely and easily performed in a state where an operator lowers a pressure-reducing plate from a driver's seat. I do.

[0009]

[Means for solving the problem] To achieve this object,
It has left and right crushed parts each having a rotatable crushed body having a cover at the upper part and a swingable pressure-reducing plate at the rear lower part of the cover, and the left and right crushed parts are foldable by folding means. In the agricultural work machine, the folding means for the left and right crushed parts and the cylinder for setting the pressure-reducing plate in the free state or the locked state are linked, and when the pressure-reducing plate is in the free state, the left and right crushed parts become inoperable and the pressure-reducing plate becomes inoperable. The present invention proposes an agricultural work machine characterized in that an electric control means is provided such that the left and right crushed portions can be folded and operated in a locked state.

[0010] Further, there are left and right crushing portions each having a rotatable crushing body having a cover at an upper portion and a swingable crushing plate at a lower rear portion of the cover, and the left and right crushing portions are folding means. In the agricultural work machine that is freely foldable, the folding means of the left and right crushed parts and the hydraulic cylinder that sets the rocking of the pressure-reducing plate in a free state or a locked state are linked by an electric control means, and the pressure-reducing plate is in a free state. Is equipped with electric control means that the left and right crushed parts can not be folded and the crushing plate can be folded when the pressure suppression plate is locked, and the electric control means is a fold detection limit An electric control box provided with an electric control circuit having a switch, a limit switch for detecting a free lock, and an electromagnetic valve for operating a plurality of hydraulic cylinders. To propose a farm machine which is characterized.

[0011]

Embodiments of the present invention will be described with reference to the drawings showing embodiments. FIG. 1 is a partially omitted rear view of a portion of a crushed soil part of the agricultural work machine of the present invention. FIG. 1 is a partially omitted plan view showing a circuit with a control box. FIG. 2 is a side sectional view showing a state where a pressure suppression plate is locked. 3 will be described with reference to FIG. 3, FIG. 4 is a side cross-sectional view showing the pressure-reducing plate in a free state, and FIG. 5 is a sequence diagram showing an electric control circuit.

A tractor (not shown) and a mounting frame of the agricultural working machine to be mounted include a mast stay 1, a mission 2, an input shaft 3, a side stay 23 and the like.

Reference numeral 4 denotes a pipe frame.
And a transmission shaft 33 connected to the input shaft 3 through the shaft. The pipe frame 4 extends left and right from the mission 2,
The left and right ends are connected to the side case 16, and the crushed earth body 11 is rotated from a transmission shaft 33 built in the pipe frame 4 via a connecting portion built in the side case 16.

Each of the left and right crushing parts 34 comprises a pipe frame 4, a crushing body 11, a pressure-reducing plate 12, a cover 13 and the like. The cover 13 covers the upper part of the rotating crushed earth 11, and the pressure-reducing plate 12 is provided on the lower rear portion of the cover 13.
1 is provided so as to be swingable. The connection between the cover 13 and the leveling plate 31 is swingably connected by a horizontal pin 29, and the connection between the leveling plate 31 and the compression plate 12 is swingably connected by a horizontal pin 30. Although not shown, a suspending body is provided on the upper surface of the leveling plate 31 via an elastic body, and an appropriate leveling pressure is applied to the crushed surface. Reference numeral 15 denotes an auxiliary plate, which is provided between the left and right pressure reducing plates 12.

The left and right crushing parts 34 have a shaft center in the vertical direction, and are respectively rotated rearward with respect to the mounting frame by using the rotating shafts 20 and 20 rotatably provided on the joining frame 21 as the rotating shaft cores. It is free. Each crushing part 34 can be folded by rotating backward. Left and right joint frames 21,
Reference numeral 21 is connected to the rotating shafts 20 and 20 at the rear, and the front inside is joined to the upper side portion 35 of the mounting frame.

A folding detection limit switch 18 is provided on an upper side portion 35 of the mounting frame. The fold detection limit switch 18 is detachable from the joining frame 21 and is closed by the joining frame 21 in a state where the left and right crushed portions 34 and 34 are spread left and right, and the folding information of the left and right crushed portions 34 is electrically transmitted. And convey it as a signal.

Reference numeral 14 denotes a connecting rod. Connecting rod 14
The left and right end portions are rotatably connected to left and right rotation shafts 14 a, 14 a substantially located on the lower extension line of the left and right rotation shafts 20, 20. Are linked. The right and left pressure-reducing plates 12 are evenly pressed by the connecting rod 14, and the level difference between the left and right crushed surfaces during the crushed soil leveling operation is eliminated. Furthermore, even when the left and right crushing parts 34, 34 are folded, the rotation axis 20 and the axis of the rotation axis 14a of the connecting rod 14 are on the same extension, so that stable rotation and folding can be performed.

The folding hydraulic cylinders 5 and 6 are means for folding the left and right crushing parts 34 and 34 and are operated by a hydraulic pump 8 incorporating a motor.
One end of each of the hydraulic cylinder 5 and the hydraulic cylinder 6 is fixed to the mounting frame, and the other end of the cylinder rod is rotatably connected to the crushing unit 34. The folding hydraulic cylinder 5 and the folding hydraulic cylinder 6 are arranged in parallel with the pipe frame 4 in a state in which the cylinder rod is extended, that is, in a state in which the left and right crushing parts 34 are opened, and are parallel to each other.

When folding the crushed soil portion 34 opened to the left and right, the cylinder rods of the folding hydraulic cylinder 5 and the folding hydraulic cylinder 6 are shortened, and the crushed soil portion 34 is rotated rearward about the rotation shaft 20. And the left and right crushing parts 34
Are folded parallel to each other.

The support bracket 17 has one end fixed to the pipe frame 4 and protrudes rearward in a substantially horizontal direction.

The support bracket 17 is connected to a support rod 28 by a support pin 27. The support rod 28 is rotatably connected at its lower end to a projection on the rear upper surface of the pressure-reducing plate 12. The support rod 28 is movable in an oblique vertical direction at an intermediate portion with respect to the support pin 27. At the upper end of the support rod 28, a T-shaped hook 32 made of a horizontal pipe is provided.

The hydraulic cylinder 7 for free lock of the pressure reduction plate 12 is fixed to the support bracket 17, and the tip of a cylinder rod of the hydraulic cylinder 7 is rotatably attached to one end of the guide frame 24. Hydraulic cylinder for free lock 7
2 is an operating source for setting the free state or the locked state. The guide frame 24 is rotatably mounted at one end with a support pin 27 as a fulcrum, and has an engagement recess 25 and a sliding projection 2.
6 is formed on the outer periphery. These support brackets 1
7, a support rod 28 having a T-shaped hook 32 at an upper end, a support pin 27, a hydraulic cylinder 7, a guide frame 24 having an engagement concave portion 25 and a sliding convex portion 26, and the like are free lock means of the pressure reducing plate 12.

When the hydraulic cylinder 7 is operated to extend the cylinder rod, the guide frame 24 rotates about the support pin 27 as a fulcrum (f1 rotation direction shown by an arrow in FIG. 3), and the engaging recess 25 of the guide frame 24 is moved. The T-shaped hook 32 is engaged with the support rod 28.
The upper end is pressed from above in the lowermost state to regulate the vertical movement, and the rocking of the pressure-reducing plate 12 is stopped to enter the locked state.

When the cylinder rod is shortened by operating the hydraulic cylinder 7, the guide frame 24 rotates about the support pin 27 as a fulcrum (f2 rotation direction shown by an arrow in FIG. 3), and the engaging recess 25 of the guide frame 24 Move away from the T-shaped hook 32,
Is located above the sliding protrusion 26 on the sliding surface. The support rod 28 is in a state in which the presser at the upper end is released, and can be moved up and down, and the pressure suppression plate 12 can swing with its own weight and is in a free state.

A free lock detecting limit switch 19 is provided at a position where the guide frame 24 of the support bracket 17 rotates. The free lock detection limit switch 19 transmits information as to whether the pressure-reducing plate 12 is in a free state or a locked state to the control box 22 through an electric circuit by an operation of the guide frame 24 through an electric circuit. When the pressure-reducing plate 12 is in a free state, the guide frame 24 is separated and opened in the free lock detection limit switch 19, thereby making the folding circuit inoperative. Therefore, the folding hydraulic cylinders 5, 6 serving as folding means cannot be operated. become. The free lock detection limit switch 19 is closed by the guide frame 24 when the pressure-reducing plate 12 is locked, and the folding circuit is energized and the folding hydraulic cylinder 5, which is a folding means,
6 is enabled.

Reference numeral 8 denotes a hydraulic pump incorporating a motor, 9 denotes a hydraulic tank, and 10 denotes a solenoid valve kid, which is fixed to a mounting frame between the side stays 23.

The electric control box 22 includes a main power supply PBS,
Free lock switch S1, folding switch S2, side leveler L (left) switch S3, side leveler R
A switch (right) S4 is incorporated. However, the configuration diagram of the side leveler L and the side leveler R is omitted in this embodiment. The electric control box 22 is connected to the solenoid valve kid 10, the hydraulic motor 8 and each switch by an electric cord, and is movable within a range allowed by the length of the electric cord. The moving range of the electric control box 22 is a range that can be carried into the cabin of the tractor to which the agricultural work machine is connected.

Next, FIG. 5 which is a sequence diagram of the electric control circuit will be described.

In the working state, that is, in the state where the crushed soil portion 34 is expanded right and left, the folding detection limit switch 18 (LS2) is in the closed state. If the pressure-reducing plate 12 is in a free state during the operation, the free lock detection limit switch 19 (LS1) is in an open state, the folding relay R1-b is in an open state, and thus the folding circuit is disconnected and the folding operation is not performed. Becomes impossible.

When the crushed soil portion 34 is expanded left and right and the pressure reduction plate 12 is locked, the folding detection limit switch 18 (LS2) is closed and the free lock detection limit switch 19 (LS1). ) Is closed. At this time, the free lock relay R2-a1 and the side leveler relay R2-a2 are in the closed state. In this state, the switches S of the side levelers L and R
3 and S4 are closed, and the respective solenoid valves SV operate. Therefore, the folding operation can be performed in this state.

The folding operation is enabled, and the left and right crushing parts 3
4 is folded rearward in parallel, the folding detection limit switch 18 (LS2) is opened,
The free lock relay R2-a1 and the side leveler relay R2-a2 are in the open state, and the solenoid valve cannot be operated. Further, as a premise of the folding operation, the free lock detection limit switch 19 needs to be in a closed state, and the locked state of the pressure reduction plate 12 is guaranteed.

Each of the free lock switch S1, the folding switch S2, the side leveler L switch S3, and the side leveler R switch S4 is connected to a relay R3 of a motor of the hydraulic pump 8, and the motors of the hydraulic pump 8 are operated synchronously. You.

[0033]

Therefore, according to the present invention, the crushed portion can be folded only when the crushing plate is in the locked state, so that the crushing plate swings up and down while the agricultural work machine is moving. There is no need to move and work safely.

Further, the work of folding the crushed soil portion and the free-lock control of the pressure-reducing plate can be remotely controlled from the driver's seat and the cabin of the tractor, so that the tractor can be easily operated from the driver's seat and the cabin during the operation. In particular, when it is mounted on a tractor of the cabin specification, the folding work and the operation of the free lock control become very easy.

[Brief description of the drawings]

FIG. 1 is a partial rear view of a crushed soil portion of an agricultural working machine according to the present invention.

FIG. 2 is also a partial plan view

FIG. 3 is an explanatory side sectional view of a state in which a pressure-reducing plate is locked.

FIG. 4 is an explanatory side cross-sectional view showing a state in which a pressure-reducing plate is free.

FIG. 5 is a sequence diagram of the electric control circuit of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mast stay 2 Mission 3 Input shaft 4 Pipe frame 5 Hydraulic cylinder (for folding) 6 Hydraulic cylinder (for folding) 7 Hydraulic cylinder (for free-locking plate free lock) 8 Hydraulic pump incorporating a motor 9 Oil tank 10 Solenoid valve kid 11 Crushed body 12 Suppression plate 13 Cover 14 Connecting rod 15 Auxiliary plate 16 Side case 17 Support bracket 18 Fold detection limit switch 19 Free lock detection limit switch 20 Rotating shaft 21 Joint frame 22 Electric control box 23 Side stay 24 Guide frame 25 Engagement concave part 26 Sliding convex part 27 Bearing pin 28 Support rod 29, 30 Horizontal pin 31 Leveling plate 32 T-shaped hook 33 Transmission shaft 34 Crushing part 35 Upper part of side surface of mounting frame

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Satoru Nakazato 1-259 Satonozawa, Towada-shi, Aomori Prefecture Inside Sasaki Corporation (72) Inventor Seigo Yoneuchiyama 1259-259 Satonosawa 1, Towada-shi, Aomori Co., Ltd. Sasaki Corporation (56) Reference Jiko Hei 7-41282 (JP, Y2)

Claims (2)

(57) [Claims] A left and right crushing part having a rotatable crushing body having a cover at an upper portion and a swingable pressure reducing plate at a lower rear part of the cover, wherein the left and right crushing parts are folding means. Agricultural work machine that is foldable by
The folding means of the left and right crushing parts and the cylinder for setting the pressure-reducing plate in a free state or a locked state are linked, and when the pressure-reducing plate is in a free state, the left and right crushed parts become unable to fold and the pressure-reducing plate is locked. An agricultural working machine comprising an electric control means for enabling the left and right crushed parts to be foldable in some cases. 2. A left and right crushing part having a cover on an upper part and a rotatable crushing body, and a swingable crushing plate on a lower rear part of the cover, and the left and right crushing parts are folding means. Agricultural work machine that is foldable by
The folding means for the left and right crushing parts and the hydraulic cylinder for setting the rocking of the pressure suppression plate in a free state or a locked state are linked by an electric control means. In the event that the crushing plate is locked and the crushing plate is locked, electric control means is provided so that the left and right crushed parts can be folded, and the electric control means is a fold detection limit switch and a free lock detection limit switch. And an electric control box provided with an electric control circuit having an electromagnetic valve for operating a plurality of hydraulic cylinders.