JP3432028B2 - Tillage equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tilling apparatus for pulling a tilling rotary working machine for tilling by a tractor. 2. Description of the Related Art Conventionally, a tilling rotary working machine is mounted on a rear side of a tractor so as to be able to ascend and descend, and the cultivating work is performed by the rotary working machine. It was desired to finish the work early. [0003] In the prior art, the tilling work efficiency can be improved by increasing the traveling speed. However, when the tractor is operated at a high speed by a traveling speed change operation, a rotary work machine is not used. The drive speed is relatively slow, the tillage pitch is large, and there is a problem that the remaining tillage increases, and when the tractor engine speed is increased to run at high speed, the drive speed of the rotary work machine increases and the tillage load increases. Is increased. [0004] Means for Solving the Problems] However, the present invention is, when is So設vertically movable a tilling rotary working machine to the tractor co
To, tilling and fast tilling switch the rotary working machine at high speed tilling operation, tilling rotary working machine by varying the driving speed tilling pitch provided Ru cultivator the controller to change the
High-speed tillage work to move the tractor at high speed
The tilling pitch can be adjusted by adjusting the tilling pitch dial.
When a switch change command is issued, the continuously variable transmission operates to
Changes the rotation of the claw shaft and continuously adjusts the tilling pitch of the rotary claw
Floor, and the load sensor detects the tilling work load.
The continuously variable transmission operates to change the rotation of the tilling claw shaft.
And change the tilling pitch of the rotary claw steplessly.
When maintaining the work load within a predetermined range, when performing tilling work by moving the tractor at high speed by means of a tractor running speed change operation or engine speed increase operation, etc. , perform high-speed tilling work at a tilling pitch suitable for the tractor running speed. In addition, it is possible to easily prevent an increase in residual tillage or an increase in tillage load, and to easily improve a tillage function in high-speed running and an improvement in handling operability. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 is a tillage control circuit diagram, FIG. 2 is a side view of the whole, FIG. 3 is a plan view of the same, and FIG. 4 is a side view of a tillage rotary working machine. In the figure, reference numeral (1) denotes a tractor, which is provided with left and right front running wheels (4) and (4) on both sides of a hood (3) in which an engine (2) is installed, and a steering handle at the rear of the hood (3). (5), a driver's seat (6) is installed behind the steering wheel (5), and left and right rear traveling wheels (7) and (7) are installed on both sides of the driver's seat (6). (6) The left and right brake pedals (9) and (9) and the clutch pedal (10) are arranged in the front step (8).
The operator is configured to travel while sitting on the driver's seat (6). A tilling rotary working machine (1) is mounted on a transmission case (11) for driving the running wheels (4) and (7) via a lower link (12) and a top link (13).
4), and the work implement (14) is mounted on the rear side of the tractor (1) so as to be able to move up and down freely.
5), a position control lever (16) for raising and lowering the work machine (14) by manual operation, and a lifting switch (17) for raising and lowering the work machine (14) to a non-work raising position and a tilling work lowering position by one-touch operation. ) Is arranged on the right side of the driver's seat (6), and the traveling auxiliary shift lever (18) and the PTO shift lever (19) for changing the output to the work implement (14) are connected to the driver's seat (6). Place it on the left. Further, as shown in FIGS. 4 to 7, an HST case (20) is arranged at the center of the work machine (14).
Power is transmitted from the PTO shaft (21) of the tractor (1), and beams (22) protrude from both sides of the HST case (20), and a support plate (23) is provided at an intermediate portion of each of the beams (22). A lower link (12) is connected to a front end of the support plate (23), and a front end of a depth frame (24) is pivotally supported at a rear end of the support plate (23). Left and right tail wheels (25) (25) are provided on the rear end side. An upper part of the chain case (26) and an upper part of the side support (27) are fixedly provided at an outer end of the beam (22), and a tilling claw shaft (28) is provided between the lower part of the chain case (26) and the lower part of the side support (27). ), A large number of rotary claws (29)... Composed of nata claws are radially implanted on the tilling claw shaft (28) in a side view, and the rotation locus of the rotary claw (29) is above. Rotary cover (3
0), and both sides are covered by side covers (31). And the tillage claw shaft (28) is HS
The output of the T case (20), the transmission shaft in the beam (22),
Driven through a sprocket and a chain in the chain case (26), the rotary pawls (29) are rotated to perform tilling, and by rotating the handle (32), the cultivating pawl shaft (28) is rotated. The rotary cover (30) can be rotated back and forth at the center. Then, a plate (33) fixed to the beam (22) is projected forward, and the plate (33)
A support rod (34) is horizontally mounted on the front end, and a mounting plate (35) is fixed to the support rod (34).
The upper part of the cutting blade (36) is fixed to 5). In addition,
Four cutting blades (36) are attached to the outer side of the machine from the lower link (12) in the left-right width direction, and the middle part of the cutting blade (36) is curved backward and inclined forward and backward.
The linear lower part of 6) faces backward in the front part of the rotation locus of the rotary claw (29). That is, in a side view, the lower part of the cutting blade (36) is disposed so as to overlap the front part of the rotation locus of the rotary claw (29), and the cutting blade (36) and the rotary claw (2) adjacent thereto are arranged.
The interval in the left and right direction of 9) is narrowed so that residual tillage cannot be performed. However, the two outer cutting blades (36) (36) are provided between the rotary claw (29) and the eccentric claw (37). A partition plate (38) is provided between the rear surface of the cutting blade (36) and the rotary cover (30). That is, the partition plate (38) is fixed to the back surface of the cutting blade (36),
The partition plate (38) is brought close to the rotary cover (30) so that straw, weeds and the like do not enter and become entangled. The partition plate (38) is formed in a triangular shape, and the upper side is closely fitted to the shape of the inside of the rotary cover (30), and the front side is closely fitted to the shape of the rear surface of the cutting blade (36). The rear side is shaped like an arc to guide straw and the like downward. And the partition plate (3
The width (plate thickness) of 8) is smaller than the width of the cutting blade (36),
The straw and weeds are not entangled. A first rear cover (40) made of a steel plate is connected to the rear end of the rotary cover (30) above the rotary pawl (29) via a first fulcrum shaft (39) so as to be vertically swingable. The front end of the second rubber rear cover (41) is fixed to the rear end of the first rear cover (40), and the leveling space (4
The front end of the third steel plate rear cover (43) is fixed to the rear end of the second rear cover (41) forming 2), and the second fulcrum shaft (44) at the rear end of the first rear cover (40) and the third rear cover (43). 43) The third fulcrum shaft (45) at the front end is connected by a pair of left and right links (46) (46), and the fourth fulcrum shaft (47) is provided substantially coaxially with the third fulcrum shaft (45).
The lower end of the first suspension rod (48) is connected to the fourth fulcrum shaft (47), and a pair of left and right second suspension rods (50) is connected to the fifth fulcrum shaft (49) at the rear end of the third rear cover (43). The lower ends are connected, and the upper ends of the first and second suspension rods (48) and (50) are attached to the support (51) of the first rear cover (40) so as to be able to move up and down. And a third rear cover (43) to form a triangle in side view, and second, third, and fifth fulcrum axes (44), (45), (49).
The third rear cover (43) is moved upward about the second fulcrum shaft (44) or the third fulcrum shaft (45), and the second fulcrum shaft (4) is formed.
4) and the suspension rods (48) (50) of the support (51)
The third rear cover (the forward movement of which is restricted by the downward protruding of the rods (48) and (50) by the operation of the leverage mechanism of the cover (43) and the rods (48) and (50) with the connecting portion as a fulcrum). 43) is moved rearward and upward to perform a floating operation in which both sides of the third rear cover (43) move back and forth in plan view. In addition, the fifth fulcrum shaft (4
A pair of left and right gas dampers (52) are connected between the support member (51) of the first rear cover (9) and the first rear cover (40), so that a substantially constant spring constant can be obtained for the entire stroke and the gas damper (52) can have a large stroke. ) To support the third rear cover (43), so that even if the tractor (1) is tilted left and right, the tilling surface can be leveled by evenly pressing the third rear cover (43) left and right. The upper ends of the suspension rods (48) and (50) are loosely inserted into the bearings (53) of the supports (51) so that the pins contact the upper surfaces of the bearings (53). (5
4) is implanted in the rods (48) and (50) to prevent the rods (48) and (50) from being pulled out downward, to limit the forward movement of the third rear cover (43), and to use the springs (55) and (50). 55) and a pair of left and right rods (5
6) (56) The lower end is connected to the upper surface of the first rear cover (40), and the upper end of the rod (56) is connected to the rotary cover (3).
The first rear cover (40) is slidably mounted on the support (57) of (0), and is configured to be elastically pressed downward by the spring (55). A rake support (58) is detachably fixed on the upper surface of the third rear cover (43), and a rake (59) fixed to the support (58) extends rearward of the third rear cover (43). And a support (51) to which the upper end of the second suspension rod (50) is attached as shown in FIG.
The upper end of the gas damper (52) is connected to the shaft (60) of the second suspension rod (50) and the gas damper (52) are provided as close to each other as possible and substantially parallel to each other. A pair of left and right tail wheels (25) and (25) are attached to the ends via a support frame (61).
5) The rake (59) is disposed between (25). The tail wheel (25) prevents the rake (59) from colliding with a ridge or the like when the headland changes direction, and allows the vehicle to travel on the road or The tail wheel (25) is also used as a bumper on the left and right outer sides in a maintenance work or the like when lifted upward. Further, a first fulcrum shaft (39) is attached at a position substantially equal to or higher than the upper end of the rotation locus of the rotary claw (29), and the rear cover is centered on the first fulcrum shaft (39) during tilling work. (40) As a result of the rise of (41) and (43), a leveling space (42) having a large area is formed below the rear covers (40), (41) and (43) behind the rotation locus of the rotary pawl (29). Rear cover (40) (4
1) The soil pushed forward by (43) is
9) Prevents reaching the soil jumping part and prevents the increase of the tilling load of the rotary claw (29) due to the tilling work at high speed. During the tilling work, the rotary claw (29) is pulled out to the ground. The rear covers (40), (41), and (43) are lifted and arranged by cultivated soil on an arc line having a radius centered on the point (A) where the rotary claw (29) is located. Uniform space of size (42)
To the rear of the rotary claw (29) and the rear cover (4
0), (41) and (43), a small object such as a fine or light soil mass is scattered to a high position on the lower surface of the rotary covers (40) and (41) by the rotary claws (29), and a large or heavy earth mass is formed. Alternatively, a large object such as a stump (rice plant) is scattered to a lower position by the rotary claw (29), and a small object becomes an upper layer and a large object becomes a lower layer due to a specific gravity separation action by the scattering of the rotary claw (29).
The upper small objects are leveled by the rear covers (41) and (43), and the large ones are pushed down further by the rear rake (59). Therefore, the large-sized material maintains good air permeability and water permeability inside the cultivated soil, and the cultivated soil surface layer is formed by the small-sized material in a state suitable for sowing or seedling transplantation. Further, four rotary claws (29) are arranged on the same circumference around the cultivating claw shaft (28) at intervals of 90 degrees.
, And the tip side of each rotary claw (29) is alternately bent in the left-right direction, and four rows and one row of rotary claw (29) are arranged on a plane orthogonal to the cultivation claw axis (28). ) A plurality of rows are provided in the axial direction, and a gap is provided between the tip trajectories of the rotary claws (29) and (29) facing each other in the left-right direction. Double the size of the rotary claw (2
9) (29) The rotary claw (29) is formed such that the base end interval is about five times as large as the tip end track gap. Further, the rotary claw (29) is curved into a shape of scooping after cutting off the soil, and a force for pushing and moving the soil in the horizontal direction by a horizontal component force of a curved end portion of the rotary claw (29) and the rotary claw (29). The scooping soil is extruded in a lateral direction substantially parallel to the axis of the tilling claw shaft (28) by the repulsive force of the elastic deformation in the lateral direction,
Left and right rotary pawls (29) (29) A structure that crushes the soil at the part of the tip trajectory gap that will be left behind to prevent the formation of residual tillage.
Percentage number of rotary pawls (29) are attached, the rotational speed of the rotary pawls (29) is made approximately the same as the conventional rotational speed (about 200 to 400 rotations per minute), and the traveling speed of the tractor (1) is Running speed (approximately 0.5
M), so that the tilling work can be performed with a work efficiency of about twice without increasing the tillage load as compared with the conventional method. In addition, the rotary claw (2
The cutting blade (36) is sunk into the soil at a position overlapping with the soil squeezing point in side view in 9), the soil sunk portion of the cutting blade (36) is inclined backward and supported, and the cutting blade (36) The left and right sides of the cutting blade (36) are formed by an uneven flat surface having a width, and a downward force in which the cutting blade (36) enters the soil by traction and a force in which the cut soil presses against the side surface of the cutting blade (36) by a restoring force. But,
The pull-out resistance of the cutting blade (36), which is generated as the pull-out resistance of the cutting blade (36) and is substantially equal to or slightly larger than the counter-force of the rotary claw (29), makes the reaction of the soil rush resistance. This prevents the tilling rotary working machine (14) from being lifted upward as a whole, and the rotary claw (29) is configured to reduce the impact generated by the intrusion into the soil. In addition, on the rear side of the tilling claw shaft (28), the reaction force (lifting force) of the leveling force of the rear covers (40), (41), and (43).
, A reaction force of the rotary claw (29) extraction force is generated, and the balance of the reaction forces stabilizes the tilling posture. FIG. 8 is a traveling drive system diagram of the tractor (1), which includes a main transmission gear group (63) for transmitting the output of the engine (2) through a main clutch (62), and
TO transmission gear group (64), forward / reverse switching gear group (65) provided at the input stage of main transmission gear group (63), and auxiliary transmission gear group (66) provided at the output stage of main transmission gear group (63). When,
Left and right front running wheels (4) via front wheel gear group (67)
(4) a front wheel drive shaft (68) for transmitting a shift output to the left and right rear traveling wheels (7) (7) via a rear differential mechanism (69);
And a rear wheel drive shaft (70) for transmitting a shift output to the vehicle. The front and rear traveling wheels (4) and (7) are configured to be driven via the respective gear groups (63), (65) and (66) and the respective drive shafts (68) and (70). A forward gear (71), a reverse gear (72), and a forward / reverse switching gear (73) are provided at the input stage of the PTO transmission gear group (64), and the forward and reverse gears (71) (72) are provided. A forward / reverse switching solenoid (74) for meshing the switching gear (73) with either one of the two is provided, and under the control of the solenoid (74), the rotary claw (29) is rotated forward to perform a tilling operation.
Further, the rotary claw (29) is reversed to detach the attached straw grass and mud. Further, the PTO output of the PTO transmission gear group (64) is transmitted to the tilling claw shaft (28) through the HST case (20) in which the hydraulic continuously variable transmission is provided, and the rotation speed of the rotary claw (29) is reduced. A configuration in which the cultivation pitches (T1) and (T2) of the rotary claw (29) are changed so as to have a continuously variable speed and a large cultivation pitch (T1) shown in FIG. 9 to a small cultivation pitch (T2) shown in FIG. are doing. As shown in FIG. 11, a hydraulic continuously variable transmission (75) is provided in place of the PTO transmission gear group (64) in FIG. By performing forward / reverse switching, the PTO output of the hydraulic continuously variable transmission (75) is transmitted from the PTO shaft (21) to the tilling claw shaft (28), the rotation speed of the rotary claw (29) is continuously variable, and The pawl (29) can be rotated forward or backward. Further, as shown in FIG. 1, the tractor (1)
Of the rotary work machine (14) when the
Fast tilling switch you automatically controlled operation (76), a rotary working machine forward and reverse automatic switch to automatically reverse rotation of the rotary pawl (29) when raising the (14) in the non-working position (77) A hydraulic lift (78) having a hydraulic lift valve for raising and lowering the rotary working machine (14) via a lower link (12); and the lift switch (1).
7), a forward / reverse switching solenoid (74), and an HST case (20) having a speed change motor and the like are connected to a tilling controller (79) composed of a microcomputer. Automatic reverse control for rotating the rotary claw (29) of the rotary work machine (14) in reverse in conjunction with an operation of raising the cultivation work position is performed. When the rotary work machine (14) reaches the field headland, Is raised to the non-tilling work position, thereby automatically rotating the rotary claw (29) in the reverse direction, so that the straw grass and mud wound on the rotary claw (29) are separated and dropped, and the rotary claw (29) is Automatic reverse rotation control is performed only when the rotation speed of the engine (2) is equal to or lower than a predetermined value, and straw grass and mud falling off due to the reverse rotation of the rotary claw (29) scatter around. It has been configured to prevent. A variable resistor-type tilling pitch dial (80) for performing a continuously variable operation of the HST case (20) by manual adjustment of an operator, and a load change of the engine (2) or the tilling claw shaft (28). And a piezoelectric capacitor type soil sensor (82) for detecting the amount by which the rear running wheel (7) sinks in the field soil is connected to the tillage controller (79). By manual adjustment output of the dial (80) or by a load sensor (8
Based on the load detection result of 1) or the soil sensor (8
Based on the field hardness detection result of 2), the HST case (2
0) controls the hydraulic continuously variable transmission, changes the rotation speed of the tilling claw shaft (28), and changes the tilling pitch (T1) (T2) of the rotary claw (29). In a tilling device in which a tilling rotary work machine (14) is mounted so as to be able to move up and down, a tractor (1) is run at high speed.
When the cultivating rotary working machine and the (14) Fast tilling switch for hydroponic耘operation (76), tilling the rotary working machine (1
A tilling controller (79) for changing the tilling pitch by changing the driving speed of 4) is provided, and the tractor (1) is driven at a high speed by a traveling speed change operation of the tractor (1) or a rotation speed increasing operation of the engine (2). Also tractor (1)
High-speed tillage work can be performed with a tillage pitch suitable for the running speed of the vehicle, and the conventional troubles of increasing the remaining tillage and increasing the tillage load are eliminated. Further, as shown in the flowchart of FIG. 12, in the high-speed tilling automatic state in which the high-speed tilling switch (76) is turned on, the engine (2) runs at a high speed at a high speed (a running speed of about 1.0 meter per second). ), When the tractor (1) reaches the field headland and the lifting switch (17) is raised, the hydraulic lift (78) is operated to operate the rotary work machine (14).
The lifting device is lifted to the non-tilling work position, and the accelerator lever or electronic governor (not shown)
The engine (2) rotation reduction operation is performed to reduce the rotation speed of the engine (2) by about 30% by operating the above. When the automatic forward / reverse rotation switch (77) is turned on and the automatic forward / reverse rotation state is turned on, the rotation of the engine (2) becomes equal to or lower than a predetermined value and the rotary work machine (14) is operated to ascend for a predetermined time. When the lifting gear is lifted to the non-tilling operation position, the forward rotation gear (71) is turned off by the control of the forward / reverse switching solenoid (74) to stop the tilling claw shaft (28). After (29) is completely stopped, the reverse rotation of the tilling claw shaft (28) in which the reverse gear (72) is turned on is performed by the control of the forward / reverse switching solenoid (74). After the straw and the mud fall off from (1), the reverse gear (72) is turned off by the control of the forward / reverse switching solenoid (74), and the tilling claw shaft (28) is stopped, and the operation waits. In the automatic forward / reverse rotation state, the engine (2)
After turning less than the predetermined rotation, turning by turning on the field headland,
When the rotary work machine (14) is lowered by the lowering operation of the raising / lowering switch (17), when the tilling claw shaft (28) is reversely rotated, the tilling claw shaft (2) is turned to the reverse gear (72).
8) After a predetermined time has elapsed after the stop operation is performed, the forward rotation operation of the tilling claw shaft (28) for turning on the forward rotation gear (71) is automatically performed, and the accelerator lever or the electronic governor is controlled. Then, the rotation of the engine (2) is automatically returned to the original state, and the rotation of the engine (2) is returned, and the tilling operation in the next step is started. Further, the engine (2) is rotated at a high speed to run at a high speed, and a high-speed tilling operation is performed. When a change in the tilling pitch is instructed by adjusting the tilling pitch dial (80), the HST case (20) is turned off. The step transmission operates to change the rotation of the tilling claw shaft (28), thereby continuously changing the tilling pitches (T1) and (T2) of the rotary claw (29). Further, the continuously variable transmission of the HST case (20) operates to change the rotation of the tilling claw shaft (28) by detecting the tilling work load of the load sensor (81), and the rotary claw (29)
The tilling pitches (T1) and (T2) are continuously changed to maintain the tilling work load within a predetermined range. Also soil sensor (82)
, The continuously variable transmission of the HST case (20) operates to change the rotation of the tilling claw shaft (28), and the tilling pitch (T1) (T2) of the rotary claw (29) is steplessly changed. When the field is soft soil, the cultivation pitches (T1) and (T2) of the rotary claw (29) are reduced. For example, the driving force of the rotary claw (29) may be small, but the clay is easily formed into a large mass. Crushes soft soil into small ones, and when the field is hard soil, the rotary claw (29)
The cultivation pitch (T1) (T2) is increased, and for example, sandy hard soil which easily breaks but requires a large driving force of the rotary claw (29) is plowed by the low-speed rotary claw (29), and the load is increased. Of the rotary claw (29). As is apparent from the above embodiments, the present invention provides a tractor (1) having a tilling rotary working machine (14) mounted thereon so as to be able to move up and down freely, and a tilling rotary working machine (1).
4) High-speed tillage switch (76) for high-speed tillage operation
If, Ru provided controller (79) to change the tilling pitch by changing the driving speed of the tiller rotary working machine (14)
In the tillage device, the tractor (1) is driven at high speed.
By performing quick tilling work, the tilling pitch dial (8
0) When change of tillage pitch is commanded by adjustment,
The step transmission (75) operates to rotate the tilling claw shaft (28).
Change the tillage pitch (T1) of the rotary claw (29)
(T2) is changed steplessly, and the load sensor (8
By detecting the tilling work load of 1), the continuously variable transmission (75)
Actuates to change the rotation of the tilling claw shaft (28),
Change the tilling pitch (T1) (T2) of the nail (29) steplessly
Further it is, those keeping the tilling load within a predetermined range, the travel speed change operation or engine (2) of the tractor (1) by a tractor (1) due to the rotational speed raising operation is high speed plowing
When performing耘作industry, tractor (1) cultivator pitch suitable for the running speed makes it possible to perform high-speed tilling of, or increasing number Zanko, easily prevent the tillage load increases, at high speed It is possible to easily improve the tillage function and the handling operability.

[Brief description of the drawings] FIG. 1 is a circuit diagram of a tillage control circuit. FIG. 2 is an overall side view. FIG. 3 is a plan view of the same. FIG. 4 is a side view of a rotary tilling machine. FIG. 5 is a side view of a rotary claw portion. FIG. 6 is a plan view of a rear cover. FIG. 7 is a rear view of the rotary claw portion. FIG. 8 is a plan view showing a drive system. FIG. 9 is an explanatory diagram showing a tillage locus of a rotary claw. FIG. 10 is an explanatory view of the same. FIG. 11 is a plan view showing a modification of FIG. 8; FIG. 12 is a flowchart of FIG. 1; [Explanation of symbols] (1) Tractor (2) Engine (14) Rotary cultivator (76) High-speed tillage switch (79) Tillage controller

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Osamu Nakagawa 1-32 Chaya-cho, Kita-ku, Osaka-shi Inside Yanmar Agricultural Machinery Co., Ltd. No.Ishikawa Shima Shibaura Machinery Co., Ltd. Matsumoto Factory (72) Inventor Akihiko Kitabayashi 1-1-1, Ishiba, Matsumoto City, Nagano Prefecture Ishikawa Shima Shibaura Machinery Co., Ltd. Matsumoto Factory (72) Inventor Akihiko Maezawa Nagano Prefecture 1-1-1, Ishiba, Matsumoto-shi Ishikawa Shima Shibaura Machinery Co., Ltd. Matsumoto Plant (72) Inventor Shinyoshi Fujisawa 1-1-1, Ishiba, Matsumoto-shi, Nagano Prefecture Ishikawa Shima Shibaura Machinery Co., Ltd. Matsumoto Plant (72) Inventor Masahiko Miyamoto 1-1-1, Ishiba, Matsumoto City, Nagano Prefecture Inside the Matsumoto Plant of Shimaura Ishikawa Machinery Co., Ltd. (72) Inventor Kimihiro Koshi 1-1-1, Ishiba, Matsumoto City, Nagano Prefecture Shimaura Ishikawa Inside Machinery Matsumoto Plant (72) Inventor Hideki Kamiyama 1-32 Chaya-cho, Kita-ku, Osaka-shi Inside Yanmar Diesel Co., Ltd. (56) References JP-A-2-145101 (JP, A) JP-A-6 -1156 (JP, A) JP-A-51-4735 (JP, A) JP-A-62-261532 (JP, A) JP-A-8-163903 (JP, A) JP-A-4-12806 (JP, U) ) Japanese Utility Model Application Hei 5-13121 (JP, U) Japanese Utility Model Application Hei 4-38202 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) A01B 33/08

Claims (1)

(57) [Claims] [Claim 1] A high-speed tilling switch for mounting a tilling rotary work machine (14) on a tractor (1) so as to be able to move up and down freely, and operating the tilling rotary work machine (14) at a high speed. (76) and a controller (79) that changes the drive speed of the tillage rotary working machine (14) to change the tillage pitch.
In tilling apparatus Ru provided, high-speed running of the tractor (1)
High-speed tilling work that allows the tilling pitch die
Tilling pitch change commanded by dial (80) adjustment
When the continuously variable transmission (75) operates, the tillage claw shaft (28)
The rotation of the knives and the tilling pitch of the rotary claw (29)
(T1) and (T2) are changed steplessly, and the load
Continuously variable transmission by detecting the tilling work load of the sensor (81)
(75) operates and changes the rotation of the tilling claw shaft (28).
, Rotary claw (29) tilling pitch (T1) (T2)
The tillage device is characterized in that the tillage work load is maintained in a predetermined range by changing the number of steps continuously .