JP2000253725A - Automatic controller of reaping height in mower apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically control a reaping height with a mower by vertically moving a mower apparatus in gearing with a vertical shaking of a rear cover. SOLUTION: This mower apparatus has a shield cover covering over an upper part of a mower fitted at a rear part of a tractor in capable of elevating and lowering through a three-point link hitch mechanism vertically moving by a hydraulic mechanism and fitted with many reaping blades on an axial periphery of a rotatable shaft extending in the horizontal direction, and a rear cover is pivoted to a rear end part of the shield cover in capable of vertically revolvable, then a gage ring 16 is located at a rear end part of the rear cover 15, thus a sensor mechanism 17 sensing the vertical shaking of the rear cover 15 and transmitting the shaking to the hydraulic mechanism, then vertically moving the mower apparatus 1 in gearing with the vertical shaking of the rear cover 15, thus automatically controlling a reaping height by the mower apparatus 1 is provided. A length of the sensor mechanism 17 is made to be controllable to control the reaping height of the mower apparatus 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mowing device for automatically adjusting the mowing height of a mower device by moving a mower device up and down in conjunction with vertical swinging of a rear cover.

[0002]

2. Description of the Related Art Conventionally, a mower is mounted on a rear part of a tractor through a three-point link hitch mechanism which is vertically moved by a hydraulic mechanism so as to be able to ascend and descend, and has a number of cutting blades mounted on the circumference of a rotating shaft extending horizontally. There is a well-known mower device in which an upper portion is covered by a shield cover, and a rear cover is pivotally attached to a rear end of the shield cover in a vertically rotatable manner.

[0003]

In this prior art mower apparatus, a rotary tilling is performed by changing a cutting blade attached to the circumference of a rotary shaft to a tilling blade and changing the rotation direction and the number of rotations of the rotary shaft. It can also be used as a device,
When used as a rotary tilling device, the change in the rotation angle of the rear cover is sensed and the hydraulic mechanism of the three-point link hitch mechanism is controlled to move the rotary tilling device up and down so that the tilling depth of the tilling rotor is kept constant. An automatic depth adjustment device that keeps is adopted. When this automatic plowing depth adjusting device is used for mowing with a mower device, the work is performed with the rear end of the rear cover grounded, so the cut grass is dragged by the rear cover, and a sensor is attached to the rear cover. Could not. For this reason, it was necessary to separately provide a gauge wheel and a sled body for adjusting the cutting height.

According to the present invention, in a mower device, a gauge wheel is provided at the rear end of a rear cover so that a sensor can be installed on the rear cover. An object of the present invention is to provide an automatic trimming height adjusting device for a mower device in which a mower device is moved up and down by controlling a mechanism to maintain a trimming height at a set constant height.

[0005]

In order to achieve the above object, the present invention provides: A shield cover covers a mower mounted on the rear of the tractor through a three-point link hitch mechanism which is vertically operated by a hydraulic mechanism and which has a number of cutting blades mounted on the circumference of a rotating shaft extending in the horizontal direction. In a mower device in which a rear cover is pivotally attached to the rear end of the shield cover so as to be vertically rotatable, a gauge wheel is provided at the rear end of the rear cover, and a gauge ring is provided between the upper surface of the rear cover and a hydraulic mechanism of a three-point link hitch mechanism. , A sensor mechanism that senses the vertical swing of the rear cover and transmits it to the hydraulic mechanism, moves the mower device up and down in conjunction with the vertical swing of the rear cover, and automatically adjusts the cutting height of the mower device It is characterized by.

B. The length of the sensor mechanism can be adjusted, and the cutting height of the mower device can be adjusted.

[0007]

According to the above construction, the mowing device automatic adjusting device of the mower device of the present invention performs the following operations. . The above A. With the configuration of the above, a gap is formed between the rear end of the rear cover and the field scene by the gauge wheel provided at the rear end of the rear cover, grass cut out from this gap is sent backward, and the rear cover is clogged with grass. There is no trailing. Therefore, the rear cover pivots up and down sensitively and controls the hydraulic mechanism of the three-point link hitch mechanism via the sensor mechanism.
The mowing device is moved up and down in conjunction with the vertical swing of the rear cover, so that the mowing height by the mower is automatically kept substantially constant.

[0008] B. above. According to the configuration described above, the cutting height of the mower device is adjusted by adjusting the length of the sensor mechanism, and cutting is automatically performed at the adjusted cutting height.

[0009]

Embodiments of the present invention will be specifically described below with reference to the accompanying drawings. 1 and 2, reference numeral 1 denotes a mower device having a long length in the left-right direction and having a mowing function. The mower device 1 includes a tractor top link and a lower link (not shown) at the front,
A lower link connecting section 2 is provided (a top link connecting section is not shown) which is connected to a well-known three-point link hitch mechanism in which the lower link rotates vertically by a hydraulic mechanism. Also, the tractor PT
Power is transmitted from the O-axis to an input shaft (not shown) protruding forward from a transmission gear box 4 provided at the center on the front left and right sides of the mower device 1 via a transmission portion 3 such as a universal joint and a transmission shaft. Is transmitted.

On both left and right sides of the gear box 4, a transmission frame 5 having a transmission shaft inside and a hollow support frame 6 serving as a main body frame extend in the horizontal direction. A chain transmission case 7 is suspended from a side end of the transmission frame 5, and a side frame 8 is suspended from a side end of the support frame 6 so as to face the chain transmission case 7. A rotating shaft 9 is suspended between the lower end of the chain transmission case 7 and the lower end of the side frame 8. A mowing blade 11 composed of a number of flare blades is attached radially around the rotating shaft 9 to form a mower 11. The power transmitted to the gearbox 4 is transmitted to the gearbox 4
In this case, the gears are shifted, the transmission shaft is rotated, the rotation shaft 9 is rotationally driven via the chain transmission case 7, and the mower 11 is rotated in the up-cut direction to perform mowing work.

The upper side of the mower 11 is covered with a shield cover 12. A side cover 13 is mounted on both left and right ends, a front cover 14 is mounted on a front part, and a rear cover 15 is mounted on a rear end. Is pivotally mounted so as to be vertically rotatable. Gauge wheels 16 are provided on both left and right ends of the rear end of the rear cover 15, and a predetermined gap is provided between the rear end of the rear cover 15 and the field scene. The gauge wheel 16 is not limited to a wheel, but may be a roller-shaped one or a sled-shaped one.

On the upper surface of the rear cover 15, a plurality of connecting holes 1 are provided.
A connecting rod 17 having a protrusion 7a protrudes, and the lower end of the sensor arm 18 is connected to the connecting rod 17 by selecting a connecting hole 17a. The upper end of the sensor arm 18 is pivotally attached to the rear end of a bell crank 19 pivotally supported by a support frame 20 via a shaft 21 so as to be able to pivot back and forth. The rear end of the hydraulic mechanism connecting rod 22 that is connected to the hydraulic mechanism of the point link hitch mechanism is pivotally mounted. The length of the hydraulic mechanism connecting rod 22 can be adjusted. When the rear cover 15 swings up and down, the swinging is performed by the connecting rod 17 and the sensor arm 18.
And transmitted to the hydraulic mechanism via the bell crank 19 and the hydraulic mechanism connecting rod 22 to move the mower device 1 up and down in conjunction with the vertical swing of the rear cover 15,
The cutting height is automatically adjusted.

At the time of mowing, by selectively connecting the lower end of the sensor arm 18 to the connecting hole 17a of the connecting rod 17, the relative length of the sensor arm 18 changes.
As the angle of the rear cover 15 changes, the support height of the gauge wheel 16 changes, and the cutting height of the mower 11 is adjusted.
Further, the operator can adjust the mowing height by adjusting the mower device 1 up and down via the three-point link hitch mechanism during the mowing work, and once the trimming height is set, the trimming height is set thereafter. The mower device 1 is automatically swung up and down so that the cutting height is automatically adjusted.

As shown in FIGS. 3 and 4, the mower device 1 replaces the cutting blade 10 attached to the circumference of the rotating shaft 9 with a cultivating blade 23 and changes the rotation speed of the rotating shaft 9 and the like. Thus, it can also be used as a rotary tilling device 24. In this case, the gauge wheel 16 of the rear cover 15 is unnecessary, and a rear cover 25 similar to the conventional one may be provided. Also in the rotary tillage device 24 of this embodiment, when the rear cover 25 swings up and down, the swing is sensed by the connecting rod 17 and the sensor arm 18 and transmitted to the hydraulic mechanism via the bell crank 19 and the hydraulic mechanism connecting rod 22. Then, the mower device 1 is moved up and down in conjunction with the vertical swing of the rear cover 25, and the tilling depth of the rotary tilling device 24 is automatically adjusted.

[0015]

As described above, according to the mowing device automatic adjusting device for mowers of the present invention, the following effects can be obtained.

[0016] A gauge wheel is provided at the rear end of the rear cover, and the vertical swing of the rear cover is sensed and transmitted to the hydraulic mechanism between the upper surface of the rear cover and the hydraulic mechanism of the three-point link hitch mechanism, and linked with the vertical swing of the rear cover. The mower device is moved up and down to provide a sensor mechanism that automatically adjusts the cutting height of the mower device, so that a gauge wheel provided at the rear end of the rear cover can be used between the rear end of the rear cover and the field scene. A gap is formed in the gap, and the grass cut off from the gap is sent backward, so that the rear cover is not jammed with the grass and dragged. Therefore, the rear cover pivots up and down sensitively, and the up and down rotation is transmitted to the hydraulic mechanism of the three-point link hitch mechanism via the sensor mechanism, and the hydraulic mechanism is controlled. Can be moved up and down to automatically keep the mowing height almost constant.

[0017] Since the length of the sensor mechanism is adjustable and the cutting height of the mower device can be adjusted, the cutting height of the mower is adjusted by adjusting the length of the sensor mechanism, and the adjusted cutting height is adjusted. Can be harvested in a state where is automatically held.

[Brief description of the drawings]

FIG. 1 is a side view of a mower device according to the present invention.

FIG. 2 is a rear view of the same.

FIG. 3 is a side view of the rotary tillage device according to the present invention.

FIG. 4 is a rear view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mower device 2 Lower link connection part 3 Transmission part 4 Transmission gear box 5 Transmission frame 6 Support frame 7 Chain transmission case 8 Side frame 9 Rotating shaft 10 Cutting blade 11 Mower 12 Shield cover 13 Side cover 14 Front cover 15, Reference Signs List 25 rear cover 16 gauge wheel 17 connecting rod 17a connecting hole 18 sensor arm 19 bell crank 20 support frame 21 shaft 22 hydraulic mechanism connecting rod 23 tilling blade 24 rotary tilling device

Claims (2)

[Claims] 1. A mower having a plurality of mowing blades mounted on a rear portion of a tractor, which is mounted on a rear portion of a tractor through a three-point link hitch mechanism which is vertically operated by a hydraulic mechanism and which has a plurality of cutting blades mounted on a rotation shaft extending in a horizontal direction. In a mower device which is covered with a shield cover and a rear cover is pivotally attached to the rear end of the shield cover in a vertically rotatable manner, a gauge ring is provided at the rear end of the rear cover, and the hydraulic pressure of the upper surface of the rear cover and the three-point link hitch mechanism A sensor that senses the vertical swing of the rear cover between the mechanism and transmits it to the hydraulic mechanism, moves the mower device up and down in conjunction with the vertical swing of the rear cover, and automatically adjusts the cutting height of the mower device. An automatic trimming height adjusting device for a mower device, comprising a mechanism. 2. The length of the sensor mechanism is adjustable,
The cutting height automatic adjusting device for a mower device according to claim 1, wherein the cutting height of the mower device can be adjusted.