JP2002291303A - Tiller for ridge edge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly carry out tillage at the edge of a ridge by a rotary tiller. SOLUTION: The structure of the tiller for the ridge edge is characterized in that the rotary tiller 1 is pressed to the ridge edge from the car body 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tilling device at a ridge.

[0002]

2. Description of the Related Art A technique is known in which a rotary tilling device is offset with respect to a vehicle body to til the edge.

[0003]

In the form in which the rotary tilling device is moved laterally with respect to the vehicle body to cultivate the ridge, the cultivation side cover at the ridge is advanced in parallel along the direction of the ridge. Therefore, the sliding contact resistance with the ridge fluctuates greatly, and the parallelism in the ridge direction is apt to decrease, and it is difficult to stabilize.

[0004]

According to a first aspect of the present invention, a rotary tilling device is provided so that a rotary tilling device can be tilled by pressing a rotary tilling device against a vehicle body against a ridge. The configuration of the device. The invention according to claim 2 has a configuration of a ridge-side tilling device, characterized in that the tilling shaft 3 of the rotary tilling device 1 is tilted A with respect to the traveling direction F of the vehicle body 2 so that the tilling is possible. .

According to a third aspect of the present invention, the rotary tilling device 1 is arranged such that the tilling shaft 3 is at right angles to the traveling direction F at a position immediately behind the vehicle body 2 and moves forward at a laterally moving position. It is characterized by being provided so as to be inclined A with respect to the direction F.

[0006]

According to the first aspect of the present invention, in the tilling on the ridge by the rotary tilling device 1, since the tilling device 1 is appropriately pressed to the ridge, the tilling is performed in parallel along the ridge direction. You. The tiller 1 is pushed back from the ridge side when the pressing resistance to the ridge is large, and is pushed out to the ridge side when the pressing resistance is small, and the tilling in the parallel ridge in the form along the curve of the ridge is smoothly performed. Tilling resistance or load can be stabilized.

According to the second aspect of the present invention, the rotary tilling apparatus 1 is cultivated and propelled in a form in which the cultivating shaft 3 is inclined A with respect to the traveling direction of the vehicle body 2. A slope A angle is formed with respect to the edge, and the lateral end of the ridge of the tillage device 1 is such that the front side approaches the ridge and the rear side is separated from the ridge, so that a small groove can be formed at the ridge. it can. The tilling resistance at the ridge portion can be reduced, and the followability of the tilling device 1 in the direction along the ridge can be facilitated.

According to the third aspect of the present invention, when the tilling device 1 is positioned immediately behind the vehicle body 2, the tilling shaft 3 can be set to the orthogonal B state to perform normal tilling work. By moving the tilling shaft 3, the tilling shaft 3 is inclined A, and the cultivation on the ridge side can be performed such that the lateral end of the tilling device 1 opens rearward with respect to the ridge side. For this reason, by moving the tillage device 1 to the ridge, it is possible to switch to the tilling posture at the ridge, and the operability can be facilitated.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention can be embodied as a form in which a rotary tilling device is mounted on a rear side of a riding type tractor. The schematic configuration of the rotary tillage device will be described with reference to the drawings. The tractor body 2 includes front wheels that can be steered by operating a steering handle 20 in front of the driver's seat 4.
And rear wheels 5 that can be linked by an engine mounted on the front
It can travel with. At the rear of mission case 6,
A lift link 10 is provided from a lower link 8 or a top link 9 that can be moved up and down by a lift arm 7, and the rotary tilling apparatus 1 can be mounted on the lift link 10. 11
Is a power take-out shaft for driving the tillage shaft 3 of the tillage device 1. 21 is a fender.

The rotary tilling apparatus 1 is of a side drive type in which left and right ends of a tilling shaft 3 are supported by a transmission case 12 and a side arm 13, and has an input shaft 15 in the center of an upper transmission case 14. The power take-out shaft 11 is connected to the power take-out shaft 11 by an interlocking shaft 16 composed of a universal joint, a telescopic shaft and the like.
The tilling shaft 3 is mounted horizontally horizontally in the left and right direction, and can be tilled by arranging the tilling claws 17 on the rotating peripheral surface. The tilling claw 17 has a tilling cover 18 on the upper rotating portion thereof, and a rear cover 19 is provided on the rear portion thereof so that the tilling soil surface can be leveled.
Reference numeral 40 denotes a side cover that covers both left and right sides.

Here, based on FIG. 1 and FIG. 2, the invention according to claim 1 is that the rotary tilling device 1 is pressed against the ridge against the vehicle body 2 so that the ridge can be tilled. It is configured as a characteristic tilling device at the ridge. As a result, in the tilling on the ridge by the rotary tilling device 1, the tilling device 1 is appropriately pressed against the ridge, so that the tilling is performed in parallel along the ridge direction. The tiller 1 is pushed back from the ridge side when the pressing resistance to the ridge becomes large, and is pushed out to the ridge side when the pressing resistance becomes small, and the tilling in the parallel ridge in the form along the curve of the ridge is smoothly performed. Tilling resistance or load can be stabilized.

Here, the tilling apparatus 1 is connected to the rear end of the lift link 10 via a pair of left and right parallel links 22. 2 can be moved left and right in parallel. A pair of upper and lower link bars 2 at the rear end of the lift link 10
4 and a pair of upper and lower hitch bars 26 arranged on the mast bracket 25 on the side of the tillage device 1 opposed thereto, parallel parallel links 22 are connected in plan view and side view.

The oscillating cylinder 23 includes a parallel link 22
Are connected between the link pivots 27 and 28 at the left and right diagonal positions, which are the link pivots 27 and 28 of the front and rear connection. When it is assumed that the tilling device 1 is located immediately behind the vehicle body 2 when the oscillating cylinder 23 is shortened, the tilling device 1 is moved rightward with respect to the vehicle body 2 by extending the oscillating cylinder 23. It can be moved in parallel to approach the ridge C.

A swing control valve 30 is provided in a hydraulic circuit 29 of the swing cylinder 23, and a controller 31
A relief valve 32 of a variable pressure is provided by the electromagnetic output from the controller. Also, on the input side of the controller 31,
A lift arm angle sensor 33 for detecting whether the tilling apparatus 1 is rising to a non-working position or a working position, a front wheel angle sensor 34 for detecting whether a front wheel is in a straight running state or a turning state, and swinging. A swing cylinder sensor 35 for detecting the extension and contraction position of the cylinder 23, and a position lever 3 for supporting an elevating position for elevating the tillage device 1 by the lift arm 7
6. A ridge-side tilling switch 37 for positioning the tilling device 1 at the ridge-side and performing ridge-side tilling control, and a swing cylinder 2
3 is provided with a swing cylinder manual switch 38 and the like for manually performing the operation of the cylinder 3.

When the cultivating switch 37 is turned on and the cultivating device 1 is lowered to the cultivating position by operating the position lever 36, the cultivating device 1 is moved from the neutral position N by the electromagnetic output of the swing control valve 30. By switching to the extension position L, the swing cylinder 23 is extended by the hydraulic pressure from the pump port P. Thus, the tillage device 1 is moved closer to the right ridge C by the swing of the parallel link 22. Tilling device 1
Is tilled over a predetermined width at the ridge by rotation of the tilling shaft 3. At this time, since the hydraulic pressure of the variable pressure relief valve 32 is acting on the extension side of the swing cylinder 23, the tillage device 1 is pressed toward the bank by this hydraulic pressure.

When the pressure exerted by the oscillating cylinder 23 becomes greater than the relief pressure of the relief valve 32, the pressure is released to the tank port T and further extension of the oscillating cylinder 23 is stopped. When the tilling device 1 is separated from the ridge C and the relief valve 32 is closed, the swing cylinder 23 is extended, and the tilling device 1 is moved to the ridge C side again. Therefore, the tilling device 1 is pressed against the ridge so as to be balanced with the relief pressure by the variable pressure relief valve 32, so that the ridge tilling can be performed along the ridge C in an equilibrium state. This variable pressure relief valve 32
Can adjust the relief pressure to a higher or lower level by an output from the controller 31. By switching the swing control valve 30 to the contracted position M, the swing cylinder 23 is shortened, and the tillage device 1 is returned to a position immediately behind the vehicle body 2.

In the above example, the tilling apparatus 1 is pressed to the ridge C side by the oil pressure. However, instead of this oil pressure, the tilling apparatus 1 may be pressed to the ridge C side by a spring device. Next, the invention described in claim 2 mainly based on FIGS. 5 to 7 is to change the direction of the tilling shaft 3 of the rotary tilling device 1 in the traveling direction F of the vehicle body 2.
It is configured as a ridge-side tilling device characterized in that it is mounted so that it can be tilled by being inclined with respect to A. As a result, the rotary tilling apparatus 1 is cultivated in a form in which the cultivating shaft 3 is inclined A with respect to the traveling direction of the vehicle body 2, so that the cultivating shaft 3 forms an inclined A angle with respect to the ridge when cultivating the ridge. Then, the side end of the ridge of the tillage device 1 is such that the front side approaches the ridge side and the rear side is separated from the ridge side, so that a small groove can be formed at the ridge side. The tilling resistance at the ridge portion can be reduced, and the followability of the tilling device 1 in the direction along the ridge can be facilitated.

The tilling apparatus 1 is attached to the lift link 10 by a non-parallel link 39 formed in a C shape in plan view. This non-parallel link 3
9 narrows the space between the left and right link pivots 27 with respect to the front end link bar 24 and widens the space between the left and right link pivots 28 with respect to the rear end hitch bar 26. As a result, the tilling shaft 3 can be switched between a state B perpendicular to the traveling direction F of the vehicle body 1 (FIG. 5) and an inclined state A (FIG. 6) by shortening the swing cylinder 23. As described above, when the tilling apparatus 1 is in the inclined A state, the side cover 40 of the tilling cover 18 at the time of the ridge C is inclined D with respect to the ridge C direction line and opened rearward.

For this reason, when the tilling device 1 is cultivated while moving forward along the ridge, the soil is shifted to the cultivated soil at the ridge to a side separated from the ridge C slope, and the tilling surface E and the ridge C slope are moved. A narrow ridge-side groove G can be formed therebetween. In the case of tilling while propelling along the edge of the ridge C, the thrust of the tilling claw 17 acts by the inclination A of the tilling shaft 3 so that the tilling device 1 is pressed to the ridge C side, and It can be tilled to follow.

In the tilling apparatus 1, the front corner of the side edge of the ridge C is pressed against the ridge C, and the rear side of the side cover 40 is ridge C.
The side cover 40 is retracted from the side.
Owing to a small resistance, it is possible to smoothly perform the propulsion tillage along the ridge C. The inclination A of the tilling device 1 including the tilling shaft 3 due to the expansion and contraction of the oscillating cylinder 23 can be operated to the left or right side so that the tilling on the ridge can be performed on either the left or right side of the tilling device 1. Can be configured.

FIG. 7 shows a case where the connecting direction of the oscillating cylinder 23 is set to the opposite side to that of FIG.
The tilling apparatus 1 is caused to perform the inclined D state by the extension of the tilling device. The swing cylinder 23 is connected between a link pivot 27 on the right side of the link bar 24 and a link pivot 28 on the left side of the hitch bar 26.

Next, based mainly on FIGS. 8 and 9, the invention according to claim 3 is characterized in that the rotary tilling device 1 is arranged such that the tilling shaft 3 is perpendicular to the traveling direction F at a position immediately behind the vehicle body 2. , And is provided in such a manner as to be inclined A with respect to the traveling direction F at the laterally moving position. As a result, the tilling device 1 is
When the tilling device 1 is positioned immediately after the tilling device 1, the tilling shaft 3 can be set in the orthogonal B state and normal tilling work can be performed.
Can be cultivated on the ridge side so that the lateral edge of the ridge is opened rearward with respect to the ridge side. For this reason, by moving the tillage device 1 to the ridge, it is possible to switch to the ridge cultivation posture at the ridge, and the operability can be facilitated.

Here, the non-parallel link 39 is formed to be open frontward, contrary to the above example, the interval between the left and right ring pivots 27 with respect to the link bar 24 is widened, and the interval between the left and right link pivots 28 with respect to the hitch bar 26 is narrowed. Things. By extending the oscillating cylinder 23 by this, the tilling device 1 is moved to the right ridge C side and the tilling axis 3 is inclined from the state B orthogonal to the traveling direction F from the state B perpendicular to the traveling direction F.
By changing the state, the side cover 40 and the ridge C are moved to the ridge cultivation posture, and the ridge groove G can be formed by the inclination A of the tilling shaft 3.

In this embodiment, the ridge tilling along the ridge can be smoothly promoted by applying the ridge pressing force by the swing cylinder 23 as shown in FIGS. Next, points different from the above example in FIGS. 10 to 12 will be described. The soil surface tilled by the rotary tilling device 1 is scraped and leveled. Therefore, a leveling device 44 including a blade 41, a tooth 42, and a leveling plate 43 is provided behind the cultivation cover 18 and a leveler such as a laser receiver 45 is provided to shift the leveling device 44 horizontally. , Level the soil surface.

The leveling device 44 is mounted on an arm 50 provided at the rear of the tilling device 1 so as to be vertically rotatable with a mounting bracket 46, and a telescopic cylinder 47 is provided between the arm 50 and the mast bracket 25. , This cylinder 4
By means of the expansion / contraction control of No. 7, it is possible to equalize the scratches. A hydraulic pack 48 containing an HST pump, a motor, and the like is interlocked with a gear 49 from the input shaft 15 that transmits the tilling shaft 3. By connecting the hydraulic pack 48 and the telescopic cylinder 47 with a hose 50, the leveling device 44 can be moved up and down together with the laser receiver 45.

The laser receiver 45 receives a laser beam from a laser transmitter installed at a fixed position in a field,
The leveling device 44 can be raised and lowered so that the laser light receiver 45 is always in the laser beam area at a constant height position. The HST pump of the hydraulic pack 48 is controlled by the output from the controller, and when the laser light receiver 45 moves up and down from the laser light range, the HST pump
Control the HST pump so that the HST pump returns to within the laser beam range.

[Brief description of the drawings]

FIG. 1 is a plan view of a tiller connection portion.

FIG. 2 is a side view thereof.

FIG. 3 is a hydraulic circuit diagram of a swing cylinder.

FIG. 4 is a control block diagram thereof.

FIG. 5 is a plan view of a tillage device connecting portion showing a partially different embodiment.

FIG. 6 is a plan view showing the operation.

FIG. 7 is a plan view showing a partially different embodiment.

FIG. 8 is a plan view showing a partially different embodiment.

FIG. 9 is a plan view showing the operation.

FIG. 10 is a side view of a leveling device section showing another embodiment.

FIG. 11 is a perspective view of a part thereof.

FIG. 12 is a plan view of a part of the control drive unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tilling device 2 Body 3 Tilling axis A Slope B Cross C Cross ridge F Traveling direction

Claims (3)

[Claims] 1. A ridge-side tilling device characterized in that a rotary tilling device 1 is pressed against a ridge against a vehicle body 2 so that the ridge can be plowed. 2. A ridge-side tilling device, characterized in that the tilling shaft 3 of the rotary tilling device 1 is tilted A with respect to the traveling direction F of the vehicle body 2 so as to be tilled. 3. The rotary tilling device 1 is in a state in which the tilling shaft 3 is at right angles to the traveling direction F at a position immediately behind the vehicle body 2, and is inclined A relative to the traveling direction F at a laterally moving position. 3. The apparatus according to claim 2, wherein
The tillage device on the ridge side described in 4.