JPH10108501A - Rotary cultivation device cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dissolve the problem that the hunching of a rear cover occurs and control is excessively operated especially when an operation is performed at a high speed at the time of constituting the rear covers of a rotary cultiva tion device so as to be vertically moved independently on the left and right and performing the left and right horizontal control of the cultivation device. SOLUTION: Separation is performed at a center over the direction of a cultivation shaft 3 on the rear side of the cultivation cover 2 of the rotary cultivation device 1, a rubber plate 25 is attached, a pair of left and right rear covers 4R and 4L for leveling a cultivation soil surface while being vertically moved independently on the left and right are provided and this rotary cultivation device cover for detecting the vertical movement of the respective rear covers 4R and 4L by respective rear cover sensors 5R and 5L and performing the left and right horizontal control of the cultivation device 1 is constituted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover for a rotary tilling apparatus which plows a wide area while being mounted on a tractor and running.

[0002]

2. Description of the Related Art Conventionally, special opening and closing 59-2
As in the tractor disclosed in Japanese Patent Publication No. 1304, the left and right portions of the rear cover are configured to be independently movable up and down, and the vertical movement is detected to extend and retract the piston of the hydraulic cylinder of the lift rod to perform horizontal control (rolling control). Techniques for performing are known. However, since the rear cover of this tractor is formed of a one-piece plate, the rear cover moves up and down excessively, especially when the vehicle speed of the tractor increases, and the rear cover sensor detects this vertical movement and excessively rolls. There was a problem that the control was activated.

[0003]

SUMMARY OF THE INVENTION The present invention provides a rotary tilling apparatus 1 having a rear side of a cultivating cover 2 in a tilling axis 3 direction.
A pair of left and right rear covers 4R, 4L are provided to separate the center and attach an elastic member 25, and to move up and down independently left and right to level the cultivated soil surface.
R and 4L are moved up and down by separate rear cover sensors 5R and 5L.
, And the left and right horizontal control of the tillage device 1 is performed.

[0004]

The soil surface tilled by the rotation of the tilling shaft 3 is raked by the left and right rear covers 4R and 4L, and is leveled over the tilling width. When the tilling device 1 is inclined left and right with respect to the soil surface, the leveling action height is different between the pair of left and right rear covers 4R and 4L on the rear side of the cultivating cover 2, so that the rear cover 4R and 4L The detection values of the left and right rear cover sensors 5R and 5L detected in association with the vertical movement are different, and based on the difference between the detection values of the left and right rear cover sensors 5R and 5L, the tillage device 1 is rolled left or right. , Left and right rear cover sensors 5R and 5
Left and right horizontal control is performed so that L has the same value. At this time, even if the work speed is increased, the hunting in the vertical direction of the rear cover caused by the work speed is reduced by the elastic member. As a result, the detection by the rear cover sensor is also stabilized, and the excessive horizontal control operation can be eliminated.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A tractor body 6 has an engine E mounted in a front bonnet 7 and has front wheels 9 steered by a steering handle 8.
It has a driver's seat 12 between the two, and has a four-wheel running mode.
At the rear of the vehicle body 6, the rotary tillage device 1 can be connected by a top link 13 and a pair of left and right lower links 14,
A lift rod 16 and a rolling cylinder 17 are connected between a lift arm 15 that is vertically rotated by expansion and contraction of a lift cylinder by hydraulic pressure and the lower link 14, and the tilling apparatus 1 is raised and lowered by the vertical rotation of the lift arm 15. it can. Also, the right and left rolling cylinders 17 are controlled to expand and contract by a horizontal control valve 18 composed of a solenoid valve of a hydraulic circuit, and the height of the left and right lower links 14 is changed so that the tillage device 1 connected thereto is moved to the left and right. Can be rolled.

[0006] The rotary tillage device 1 supports a tillage shaft 3 on which a tillage claw 19 is arranged in a side-drive form in a horizontal manner in the left and right direction, and the rotation circumference of the tillage claw 19 is covered with a tillage cover 2. Reference numeral 20 denotes a power take-out shaft, which can rotate the tilling shaft 3 in conjunction with a front input shaft 22 of a transmission case 21 at the center of the tilling device 1. On the rear side of the tillage cover 2, a rear cover 4
Is provided so as to be movable up and down, and is repelled downward by a damper. The vertical movement of the rear cover 4 is detected by a rear cover sensor 5 on the till cover 2. A mounting plate 24 is attached to the rear end of the cultivation cover 2 by a hinge 23 so as to be vertically rotatable or rotatable. The rear cover 4 is mounted on the mounting plate 24 via a rubber plate 25 serving as an elastic member. The rear cover 4 can swing up and down by the elasticity of the rubber plate 25 with respect to the mounting plate 24, and the vibration absorbing effect and the leveling effect are enhanced.

The rubber plate 25 is separated into left and right parts at the center in the width direction, is separated into a left rubber plate 25R and a right rubber plate 25L, and can swing up and down independently. or,
The rear cover 4 is made of sheet metal, and the rubber plates 25R, 25L
Are attached separately to the lower part of the rear cover 4R, and are separated from each other along the lower edge of the left rubber plate 25R.
The rear cover 4L is provided on the right rubber plate 25L along the lower edge, and independently oscillates vertically to level the plowed soil surface.

[0008] The mounting plate 24, the left and right rear covers 4R, 4
Dampers 26, 27 provided between the rear covers 4R, 4L are arranged at appropriate intervals on both left and right sides of the width of each rear cover 4R, 4L. Further, the mounting plate 24 may be supported by a spring damper or the like with respect to the tilling frame 28 of the tilling apparatus 1 and may be configured to receive a reaction force of leveling pressure (not shown).
In addition, a configuration may be adopted in which the leveling pressure can be adjusted with a handle.

The rear cover sensors 5R and 5L are composed of potentiometers and are attached to the tillage cover 2, and a sensor rod 2 is provided between the right and left rear covers 4R and 4L.
9R and 29L to detect the amount of vertical rotation of the rear covers 4R and 4L. A connecting plate 30 connects the left and right rear covers 4R and 4L to each other, and engages connecting hooks 31 at both left and right ends with connecting pins 32 of the rear covers 4R and 4L. The connecting plate 30 can be removed by removing the connecting hook 31 to the connecting pin 32.

The space between the left and right rear covers 4R, 4L where the connection plate 30 is removed is a rubber plate 25R, 2R.
5L is formed so as to extend to substantially the same position as the lower edges of the rear covers 4R, 4L, and the lower edges can level the soil surface. In the space between the rear covers 4R and 4L, a cultivator and other working devices may be positioned and attached. In place of the connecting plate 30, a joining zipper or the like is provided between the left and right rubber plates 25R and 25L. It may be configured such that it can be directly connected by a.

A controller CPU having a microcomputer has a tillage depth dial 33 for setting a tillage depth at the time of tillage depth control.
Of the left and right rear cover sensors 5
R and 5L detection values are input, and on the output side,
Lift control valve 3 for raising and lowering the lift arm 15
4, and the horizontal control valve 18 and the like can be operated as an electromagnetic solenoid output.

Horizontal control A by the controller CPU
In the cultivation depth control B, the difference between the left and right rear cover sensors 5R, 5L and the average value are calculated as shown in the flowchart. When the difference is larger than a specified value, the horizontal control A according to the difference is performed. When the difference is smaller than the specified value, the cultivation depth control B is performed according to the difference between the average value and the set value by the cultivation depth dial 33, and the cultivation depth is controlled so as to be close to the set value. You. In the horizontal control A, the control sensitivity is changed depending on whether or not the work implement, which is the tilling device 1, is immediately after the descent. Immediately after the tilling device 1 descends, the relationship between the ground and the cultivating device 1 is often greatly deviated due to the inclination and the situation of the ground, the tractor, and the like, and this is quickly corrected. The rubber plate 25 suppresses the vertical movement of the rear cover 4 even when the work is performed at a high speed, so that the detection by the rear cover sensor 5 can be performed well.

FIG. 4 differs from the above example in that the side covers 35 provided on the right and left sides of the bonnet 7 are rotated with respect to the fixed undercover 36 so that the upper cover 37 is turned laterally outward in a substantially horizontal state. It is configured so that it can be opened by opening, maintenance of the engine E part,
As a replenishing stand for refueling the engine fuel tank by opening the cap 38, the work is facilitated.

Reference numeral 39 denotes a hook, which is fitted to a boss 40 integral with the upper edge of the under cover 36 and integral with the lower edge of the upper cover 37, and can be turned up and down to open and close the side of the bonnet 7. Reference numeral 41 denotes a step guard at the front of a step floor 42, and reference numeral 43 denotes a support rod attached to the front side of the step floor 42, which can support the open position of the upper cover 37. A clip 44 stores and holds the support rod 43.

In FIG. 5, a pair of front and rear grommets 45 is provided on the lateral side of the bonnet 7, and a pin 46 projecting from the inside of the upper cover 37 is fitted to the grommet 45 to maintain the closed position. In FIG. 6, a support structure of an interlocking shaft 48 from the steering handle 8 to a power steering 47 formed of an orbit roll is supported by a ball bearing 51 via a ball bearing 51 on a side of a gear case 50 formed on a front side of an engine body 49. I do. A timing gear, a hydraulic pump, a fuel injection pump 52, and the like are disposed in the gear case 50. An interlocking shaft 48 is provided in a lower portion of the lateral end in the front-rear direction, and the ball bearing 51 is connected to the interlocking shaft 48.
The center part of the is made common and supported.

The power steering 47 is fixed inside a front axle bracket 53 integral with the front engine body 49, and is connected to an interlocking shaft 48 by a universal joint 54. A steering shaft 55 having the steering handle 8 is supported by a steering post 56, and has a lower end connected to the interlocking shaft 48 by a universal joint 57. 58 is a rear clutch housing, 59 is a lower oil pan, 60 is a front radiator 61 is a radiator fan.

7 and 8 are different from the above example in that
A bevel gear 63 meshes between an interlocking shaft 48 interlocked with a steering shaft 55 and a power steering shaft 62 on the front side of the gear case 50, and the gear case 64 is attached.

[Brief description of the drawings]

FIG. 1 is a perspective view of a tillage device and a side view of a part thereof.

FIG. 2 is a side view of the tractor.

FIG. 3 is a control block diagram and a control flowchart.

FIG. 4 is a perspective view of a bonnet part showing another embodiment, and an exploded perspective view thereof.

FIG. 5 is a perspective view of a bonnet part showing another embodiment, and a cross-sectional view of a part thereof.

FIG. 6 is a side view of a steering interlocking unit.

FIG. 7 is a plan view of a steering interlocking unit showing a partially different embodiment.

FIG. 8 is a perspective view thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tilling device 2 Tilling cover 3 Tilling shaft 4 Rear cover 5 Rear cover sensor 25 Rubber plate

Claims (1)

[Claims] 1. An elastic member 25 is attached at a center portion of a rotary tillage device 1 at a rear side of a tillage cover 2 in a tillage shaft 3 direction and an elastic member 25 is attached. The left and right rear covers 4R and 4L are provided,
The rotary tilling device cover is characterized in that the vertical movement of each of the rear covers 4R, 4L is detected by separate rear cover sensors 5R, 5L, and the left and right horizontal control of the tilling device 1 is performed.