JPH09172803A - Rotary working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary working machine improved in operation efficiency, capable of rapidly carrying out change operation from a control part, comprising a stationary knife changeable from an action position to plunge into a field to a nonaction position to retreat by a changing means installed in the vicinity of the control part of a traveling vehicle. SOLUTION: A stationary knife 17 is installed at a front part of a tilling rotary 12 in a rotary apparatus 7 attached to the rear of a traveling vehicle 1. The stationary knife 17 is changeable in position from an action position to plunge into a field to a nonaction position to retreat from the field by a changing means 30 installed in the vicinity of a control part 4 of the traveling vehicle 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary working machine in which a fixed blade is provided in front of a tilling rotary in a rotary device to prevent the rotary from floating during work traveling. Here, the rotary working machine includes a walk-type cultivator having a traveling unit interlockingly connected with a rotary device, and a riding-type cultivator having a rear part of the tractor or the like detachably interlockingly connecting the rotary device.

[0002]

2. Description of the Related Art Generally, during cultivating work with this type of rotary working machine, the higher the traveling speed, the more the pulling resistance of the cultivating rotary increases, so that an upward slip phenomenon occurs in the rotary and the rotary rises. There is a problem that the plowing depth becomes shallow.

Therefore, conventionally, a fixed blade is attached to the front side in the traveling direction of the tilling rotary in the rotary working machine so as to prevent the rotary from rising during working traveling.

[0004] By the way, depending on the dry and wet conditions of the field, mucus, and other soil conditions, the fixed blade may have a great influence on the traveling speed and the plowing depth, thus hindering the plowing work. Therefore, in such a case, it is preferable not to attach the fixed blade. So usually,
The fixed blade is supported so as to be able to change its position between an operating position where it rushes into the soil and a non-operating position where it retracts from the soil, and when necessary, the operator manually switches the fixed blade to the operating position, and is not necessary. Sometimes, the fixed blade is manually switched to the non-acting position.

[0005]

However, as described above, the operator manually switches the fixed blade between the working position and the non-working position during the tilling work or before the tilling work depending on the soil conditions in the field. Is very troublesome not only in the case of a walk-type cultivator but also in the case of a riding-type cultivator. In order to switch to the position, it is necessary for the operator to once descend from the tractor or the like and perform the switching operation of the fixed blade, which is not only very troublesome, but also causes a problem of lowering work efficiency.

An object of the present invention is to provide a rotary working machine in which a fixed blade can be easily switched between a working position and a non-working position near a steering section of a traveling vehicle.

[0007]

In order to achieve the above object, the invention according to claim 1 is, as shown in FIGS. 3 and 4,
In a rotary working machine having a fixed blade 17 in front of a rotary 12 of a rotary device 7 mounted on the rear portion of the traveling vehicle 1, the fixed blade 17 is provided in the vicinity of the control section 4 of the traveling vehicle 1, and a switching means. With 30, it is possible to change the position between the working position that enters the field and the non-working position that retracts from the field.

[0008]

According to the invention of claim 1, when the fixed blade 17 is switched between the working position and the non-working position depending on the soil conditions in the field, etc., the control section 4 of the traveling vehicle 1 is used.
By switching the switching means 30 provided nearby,
The fixed blade 17 can be easily switched between the working position and the non-working position. Therefore, when the rotary device 7 is linked to the traveling vehicle 1 such as a tractor and the plowing work is performed, the fixed blade 17 can be operated. Even when switching between the operating position and the non-operating position, it is not necessary for the operator to leave the control section 4 by going down from the tractor or the like, and the fixed blade 17 can be switched from the control section 4 quickly. It is possible to improve work efficiency.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 3 and 4 show the entire structure of a rotary working machine. In the embodiments of the drawings, a tractor is used as a traveling vehicle 1, and the tractor 1 includes a pair of left and right front wheels 2. Also, a control unit 4 supporting the rear wheel 3 and provided with a control handle 41, a driver's seat 42, etc. at the central portion is arranged, and on the rear side, a vertical lifting device composed of a top link 51 and a pair of left and right lower links 52. 5 are arranged. A main shift lever 6a, a sub shift lever 6b, and a PTO shift lever 6c are arranged near the control seat 42 in the driver's seat 4.

On the rear side of the tractor 1, a side drive type rotary device 7 is detachably interlocked with the vertical lifting device 5, and the rotary device 7 is
A gear box 8 is arranged in the central portion in the vehicle width direction, and an input shaft 8a protruding forward from the gear box 8 is connected to a PTO shaft (not shown) of the tractor 1 via a drive shaft 9 with a universal joint. I am letting you.

A beam 10 is provided on the gear box 8 so as to extend toward both sides in the vehicle width direction, and the lower link 52 is provided on the beam 10 via a support plate and a connecting pin.
And a mast 1 on the upper side of the beam 10.
1 is fixed and the top link 51 is attached to the mast 11.
Are linked.

Further, a cultivating rotary 12 is supported on the beam 10, and the rotary 12 extends in the vehicle width direction supported by a chain case 13 attached to an outer end portion of the beam 10 in the vehicle width direction. Claw shaft 14 and the claw shaft 1
4 and a large number of tilling claws 15 supported radially, and the rotary cover 1 is provided on the outer peripheral portion of each tilling claw 15.
6 is provided. At this time, the plowing claw 15 includes a gear in the gear box 8, a transmission shaft in the beam 10,
Rotational power from the PTO shaft on the tractor side is transmitted through the sprocket and chain in the chain case 13 and the plowing claw shaft 14 to perform plowing work in the field.

Further, fixing claws 17 are attached to both sides in the vehicle width direction on the front side in the traveling direction of the tilling rotary 12, and these fixing claws 17 are projected into the soil during the tilling work by the rotary 12. , This rotary 1
2 is prevented from floating upward due to tilling resistance.

In the above structure, the fixed blades 17 can be automatically repositioned in the vicinity of the control section 4 of the tractor 1 between the working position where the fixed blades 17 enter the field and the non-working position where the fixed blades 17 retract from the field. The switching means 30 is provided.

Specifically, as apparent from FIG. 1, a supporting rod 18 protruding downward is fixedly provided at an outer end of the beam 10 in the vehicle width direction, and a supporting rod 18 is laterally provided at a lower end side of the supporting rod 18. A shaft rod 18a extending in the direction is provided, and a cylindrical body 17a inserted into the shaft rod 18a is fixed to one end side of the fixed blade 17, and the entire fixed blade 17 is inserted through the cylindrical body 17a. While swinging up and down around the shaft rod 18a,
The protruding piece 1 is provided on the side of the cylindrical body 17a opposite to the fixed blade 17.
7b is projected.

A supporting plate 19 projecting forward is fixed to the beam 10 to support the hydraulic cylinder 20 on the supporting plate 19, and a tip end side of a piston rod 21 provided in the cylinder 20 is fixed. The protruding piece 17b of the fixed blade 17
And a working position in which the fixed blade 17 is rushed into the field through the piston rod 21 by connecting and disconnecting oil to and from the cylinder 20 as shown by the solid line in FIG. As shown by the phantom line in the figure, the position can be changed to a non-acting position that retracts upward from the field.

Further, the protruding piece 17 provided on the fixed blade 17
When the fixed blade 17 reaches the working and non-working position on the swing locus of the shaft b around the shaft 18a, the projecting piece 17b is brought into contact with the fixed blade 17 to work and not work. Two first and second detectors for detecting that they are located in the working position
Limit switches 23 and 24 are provided respectively. In the embodiment shown in the figure, when the limit switches 23, 24 are arranged on the swing locus of the projecting piece 17b, the cylinder 20 is provided with two mounting rods 25 having different vertical heights.
26 are fixedly mounted, and the limit switches 23 and 24 are mounted on the mounting rods 25 and 26, respectively.

Also, as shown in FIG. 4, the tractor 1 is
A hydraulic pump 27 for supplying and discharging oil to and from the cylinder 20 is provided inside the front of the control section 4 in
A solenoid valve 28, which is symbolized as shown in FIG. 2, for switching the oil supply / discharge direction from the pump 27 to the cylinder 20 is disposed inside the rear part of the control section 4.

The driver's seat 42 in the control section 4
As the switching means 30 on the side of the main switch 3 equipped with a lamp 31A on the power source 29 mounted on the tractor 1.
1 is connected to the main switch 31 so that the fixed blade 17 is selectively switched between the above-described operating position or non-operating position and manual switching by operating the main switch 31. A manual switch 32 that allows the fixed blade 17 to be manually switched between an operating position and a non-operating position is provided near the
2, two lamps 33 that are turned on when the fixed blade 17 is manually switched to the operating position and the non-operating position,
34 are connected.

Further, in the embodiments shown in the respective drawings, a reverser lever 35 for switching the forward / backward movement of the body is arranged near the steering handle 41 in the steering section 4, and the reverser switch 36 is arranged on the swing locus of the lever 35. Provide the lever 35
When the switch 36 is in the automatic switching position, the solenoid valve 28 is switched to move the fixed blade 17 to the operating position, and when the lever 35 is in the reverse position, The fixed blade 17 is automatically swung to the non-acting position. Further, on the swing locus of the sub-transmission lever 6b provided on the side of the driver's seat 42 in the control section 4, the sub-transmission lever 6b is normally located at the highest speed position or the like where the rotary 12 is not used. The auxiliary shift switch 37 that is turned off when the switch is in operation is provided.

Then, as shown in FIG.
Is connected to the main switch 31 having two first and second contacts 31a and 31b, the first contact 31a of the switch 31 is connected to the reverser switch 36, and the first switch provided on the reverser switch 36 is connected to the main switch 31. Contact 36a
Is connected to the right solenoid 28a of the solenoid valve 28 via the auxiliary shift switch 37, and the main switch 31 is switched to the first contact 31a side (automatic switching).
In this case, the auxiliary shift switch 37 is turned on, the reverser lever 35 is positioned at the forward position, and the reverser switch 36 is turned on by its first contact 36.
When switched to the a side, the right solenoid 28a is excited to switch the oil from the pump 27, and the piston rod 21 of the cylinder 20 is retracted to swing the fixed blade 17 to the working position side. On the other hand, the second contact 36b provided on the reverser switch 36 is
When the left solenoid 28b of the solenoid valve 28 is connected, the reverser lever 35 is positioned in the reverse position and the reverser switch 36 is switched to its second contact 36b, the right solenoid 28a is excited to pump the pump. By switching the oil from 27, the piston rod 21 of the cylinder 20 is moved backward to swing the fixed blade 17 toward the non-acting position side.

The manual switch 32 is connected to the second contact 31b of the main switch 31, and the first and second contacts 32a, 32 provided on the manual switch 32 are connected.
Each of the lamps 33 and 34 is connected to b, the right side solenoid 28a is connected to the first contact 32a via the auxiliary transmission switch 37, and the second contact 32b is connected to the left solenoid 28b. . Further, each of the solenoids 28a and 28b has the first and second limit switches 2 provided on the swing locus of the fixed blade 17.
3 and 24 are connected to each of these limit switches 23,
By means of 24, the solenoids 28a and 28b are energized and deenergized. In the embodiment of each figure, since a pair of left and right fixed blades 17, 17 are provided on both sides of the rotary 12 in the vehicle width direction, each of these fixed blades 1
Two sets of the cylinders 20 and 20 for swinging 7 to the working position and the non-working position are provided, and it is detected that each of the fixed blades 17 is rocked to the working position and the non-working position. Upper and lower two sets of first and second limit switches 23,
24 are arranged respectively.

Next, the operation of the above configuration will be described. First, at the time of automatic switching when the main switch 31 is switched to the first contact point 31a side, when the fixed blade 17 is advanced to the operating position due to soil conditions in the field, the auxiliary transmission switch 37 is in the ON operation state. And the reverser lever 35 is positioned at the forward position so that the reverser switch 36 has the first contact 36a.
When switched to the side, the lamp 31A is turned on and the right solenoid 2 of the solenoid valve 28 is turned on.
8a is excited, the supply / drain direction of oil from the hydraulic pump 27 to each cylinder 20 is switched accordingly, and each piston rod 21 thereof is retracted to move each fixed blade 1
7 is advanced to the operating position shown by the solid line in FIG.

At this time, if the sub-transmission switch 37 is in the OFF operation state, that is, the sub-transmission lever 6b is normally located at the highest speed position where the rotary 12 is not used and the sub-transmission switch 37 is turned off. The right solenoid 28a of the solenoid valve 28 when in operation.
Since the fixed blades 17 are prevented from advancing to the operating position without being excited, the fixed blades 17 are advanced to the operating position when the tractor 1 travels at high speed. It is possible to prevent damage to 17 and its mounting member.

Further, when the reverser lever 35 is positioned in the reverse position and the reverser switch 36 is switched to the second contact 36b side thereof, the left solenoid 28b of the solenoid valve 28 is excited, and accordingly the above-mentioned The supply / drain direction of oil from the hydraulic pump 27 to each cylinder 20 is switched, each piston rod 21 is advanced, and each fixed blade 17 is retracted to the non-acting position shown by the virtual state in FIG. Therefore, it is possible to prevent the fixed blades 17 and their mounting members from being damaged by advancing the fixed blades 17 to the operating position during the backward traveling of the tractor 1.

Furthermore, when each of the fixed blades 17 is moved to the working position and the non-working position as described above, the movement of each of the fixed blades 17 to the working position and the non-working position is the first and second working positions. The solenoids 28a and 28b are deenergized by the limit switches 23 and 24, and the solenoid valves 28 are held in a neutral state. The rod 21 does not operate and holds each of the fixed blades 17 in the working position or the non-working position.

The fixed blades 17 can be located at the working position and the non-working position by a manual operation instead of the automatic operation as described above. That is,
With the main switch 31 switched to the second contact 30b side (manual switching state), the manual switch 32 is set to the first position.
By switching to the contact 32a side, the lamp 33 is turned on, and the right solenoid 28a of the solenoid valve 28 is excited when the auxiliary transmission switch 37 is in an ON state, and the hydraulic pump 2 is accordingly energized.
The direction of oil supply and discharge from 7 to each cylinder 20 is switched, each piston rod 21 thereof is retracted, and each fixed blade 17 is advanced to the working position. Further, by switching the manual switch 32 to the side of the second contact 32b, the lamp 34 is turned on and the left solenoid 28b of the solenoid valve 28 is excited, so that the hydraulic pump 27 reaches each cylinder 20. The direction of oil supply and discharge is switched, and each piston rod 21
Is advanced to retract each fixed blade 17 to the non-acting position.

According to the above construction, when the fixed blades 17 are switched between the operating position and the non-operating position depending on the soil conditions in the field, the main switch 31 provided near the control section 4 of the tractor 1 and By switching the manual switch 32, the fixed blades 17 can be easily switched between the operating position and the non-operating position. Therefore, the rotary device 7 is connected to the tractor 1 in an interlocking manner to perform plowing work. When the fixed blades 17 are switched to the working position and the non-working position, the operator does not need to descend from the tractor 1, and the fixed blades 17 are switched from the control section 4 quickly. It is possible to improve work efficiency.

In the above embodiment, the case where a tractor is used as the traveling vehicle 1 and the rotary device 7 is interlockingly connected to the tractor 1 has been described, but in the present invention, the rotary device 7 is provided behind the traveling portion. It can also be applied to, for example, a traveling cultivator in which Further, one or more fixed blades 17 may be arranged in the vehicle width direction. Further, the position of the fixed blade 17 may be changed not only by the hydraulic cylinder 20 described above but also, for example, by a pneumatic cylinder, and the position can be changed by using a motor or the like. Is.

By the way, in the above tractor, as shown in FIGS. 5 and 6, by depressing one or both of the left and right brake pedals 43 and 44, the engine output characteristic is set to the eco mode or the standard mode having the drove characteristic. I am trying to switch to. Then, the left and right brake operations are not detected by individual switches, but by a single switch 45, the number of switches and switch circuits is reduced to one, and cost is reduced, and repair and repair at the time of failure are performed. We are trying to reduce the time and labor required for diagnosis.

That is, a single switch 45 is arranged on the lower surface of the driver step 46, and its switch contact 45S.
A wide switch operating plate 50 that swings around a fulcrum 47 and abuts on the arm portions 48 and 49 of the left and right brake pedals 43 and 44 is faced, and the urging spring 40 formed of a coil spring normally operates the switch. The plate 50 is brought into contact with the switch contact 45S to be held in either an off state or an on state, and the switch operating plate 50 is depressed by depressing either or both of the left and right brake pedals 43 and 44.
Is swung downward to open the switch contact 45S and switch it on or off.

[Brief description of the drawings]

FIG. 1 is a side view showing a mounting portion of a fixed blade in a rotary working machine of the present invention.

FIG. 2 is a control block diagram for changing the position of the fixed blade.

FIG. 3 is a side view showing the overall structure of a rotary working machine.

FIG. 4 is a plan view thereof.

FIG. 5 is a plan view of a brake operating portion of the tractor.

FIG. 6 is a side view of a brake operating portion of the tractor.

[Explanation of symbols]

1 ... traveling vehicle, 7 ... rotary device, 12 ... rotary, 17
... fixed blade, 30 ... switching means.

Claims (1)

[Claims] 1. A rotary working machine in which a fixed blade (17) is provided in front of a tilling rotary (12) of a rotary device (7) mounted on a rear portion of a traveling vehicle (1), the fixed blade (17). It is possible to change the position of the vehicle to a working position that plunges into the field and a non-working position that retracts from the field by a switching means (30) provided in the vicinity of the control section (4) of the traveling vehicle (1). Rotary working machine.