JPH0947103A - Tilling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tilling device enabling two rear covers collocated longitudinally to be easily lockable at the lower limit acting position. SOLUTION: In this tilling device mounted with a double-type rear cover so designed that a 1st rear cover 40 is collocated in the rear of a rotary cover 30, and a 2nd rear cover is provided in the rear of the 1st rear cover 40 in a vertically movable way, locking members 63, 64 are provided so as to lock the 1st and 2nd rear covers 40, 43 at the lower limit acting positions, respectively, and are also interlockingly linked to a single control wire 69 to conduct locking/unlocking.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cultivating apparatus for pulling a cultivating rotary working machine to a tractor and increasing the traveling speed of the tractor to perform cultivating work at high speed so as to shorten the cultivating time. Regarding

[0002]

In the rear cover of this seed tilling device, the rear cover having a structure in which the first rear cover at the front part and the second rear cover at the rear part are connected to each other, the first and second rear covers are provided. If both are fixed at the lower limit operating position, lock members for restricting the upward movement of the suspension rods of the first and second rear covers are respectively provided, and wires are respectively provided to the lock members for the first and second rear covers. The first and second rear covers are locked by the lock member by connecting and pulling these two wires, and the leveling work is performed by these rear covers. However, in this case, not only does the sliding resistance of the wire be doubled and a large operating force is required, but also the appearance structure is complicated and the wire accidents are increased due to the increase in the number of wires. It was

[0003]

SUMMARY OF THE INVENTION Therefore, the present invention has a two-stage rear cover in which a first rear cover is connected to the rear part of the rotary cover and a second rear cover is connected to the rear part of the first rear cover so as to be vertically movable. In the tiller,
A lock member is provided to fix the first and second rear covers at the lower limit operating position, and these lock members are
The first and second rear covers can be easily fixed at the operating position by interlockingly connecting with the second operation wire, locking and unlocking, and, for example, only pulling and operating the single operation wire. Thus, the operating force is reduced and the handling is excellent, and the number of parts is reduced to simplify the structure.

[0004]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a side view of a rear cover portion, 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 rotary working machine portion. In the figure, (1) is a tractor,
Left and right front running wheels (4) and (4) are installed on both sides of the bonnet (3) in which the engine (2) is installed, and a steering handle (5) is provided at the rear of the bonnet (3). ) The driver's seat (6) is installed in the rear, the left and right rear running wheels (7), (7) are installed on both sides of the driver's seat (6), and the driver's seat (6) is provided in front of the step (8). The left and right brake pedals (9) and (9) and the clutch pedal (10) are provided so that an operator can sit on the driver's seat (6) and travel.

Further, a tillage rotary working machine (14) is provided through a lower link (12) and a top link (13) constituting a three-point link mechanism (11) in a mission case which drives the traveling wheels (4) and (7). Attach the work machine (1
4) is mounted on the rear side of the tractor (1) so as to be able to move up and down, and is equipped with a main traveling transmission lever (15) and the working machine (14).
The position control lever (16) for manually raising and lowering the work machine, and the raising and lowering switch (17) for raising and lowering the working machine (14) to the non-working raising position and the plowing work lowering position by one-touch operation. And the traveling auxiliary speed change lever (18) and the working machine (1).
4) PTO gear shift lever (19) to change the output to
On the left side of the driver's seat (6).

Further, as shown in FIGS. 4 to 5, a gear box (20) is arranged at the center of the working machine (14),
The power is transmitted from the PTO shaft (21) of the tractor (1), the beams (22) are projected to both sides from the side surface of the gearbox (20), and the support plates (23) are provided at the midpoints of the beams (22). The lower link (12) is connected to the front end of the support plate (23), and the front end of the depth frame (24) is pivotally supported at the rear end of the support plate (23).

An upper part of the chain case (26) and an upper part of the side support (27) are fixed to the outer end of the beam (22), and the tiller claw shaft (28) is provided between the lower part of the chain case (26) and the lower part of the side support (27). ) Is horizontally installed, and a large number of rotary claws (29), which are nata claws, are radially planted on the cultivating claw shaft (28) in a side view, and the upper part of the rotary claw (29) is rotated. Rotary cover (3
0) and both sides are covered by side covers (31). The tiller claw shaft (28) is driven through the gear in the gear box (20), the transmission shaft in the beam (22), the sprocket and the chain in the chain case (26), and the rotary claw (29) ... It can be cultivated by rotating the handle and the handle (3
By the rotating operation of 2), the rotary cover (30) can be rotated back and forth around the axis of the tillage claw shaft (28).

Then, a plate (33) fixed to the beam (22) is made to project forward, and the plate (33) is provided.
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 lower link (12) in the left-right width direction, and the middle portion of the cutting blade (36) is curved backward and inclined forward and backward.
The straight lower part of 6) faces the front part of the rotary locus of the rotary claw (29) in a backward inclined shape.

The rotary claw (29) is made to have elasticity by alternately bending the tip end to the right or left for a certain width (approximately 80 mm) in order to invert the soil after cutting it, and 1
Four holders (four rotations of the claw shaft (28) one rotation are attached to the four holders attached to the same cross section of the claw shaft (28) so that the bending directions of the claws (29) facing each other at 80 ° are the same in the right or left direction. Number of claws per hit Two rotary claws (29) are attached in the same direction. The radius of rotation of the rotary pawl (29) is set to approximately 245 mm, and the base interval (T) of the adjacent rotary pawls (29) and (29) that are opposed to each other in the lateral direction is set to a large gap of 5. The interval (t), which is the gap of the tip claw locus (L), is approximately 1 (T: t≈5: 1) (T≈200
mm, t≈40 mm), and the base interval (T)
By increasing the number of rotary pawls (29) and decreasing the number of rotary pawls (29) to be installed, the required power is reduced, and the remaining power for cultivating with the same power is turned to speed to enable high-speed cultivating. It is a thing.

That is, for example, when the number of pawls per rotation of the pawl shaft (28) is one, and the pawl shaft rotation speed is about 170 rpm and the vehicle speed is 0.5 m / s, the pawl shaft (2
8) Assuming that the number of claws per rotation is 2, the number of claw shaft rotations is approximately 1
It is performed under working conditions of 70 rpm and a vehicle speed of 1 to 1.5 m / s, and is configured to substantially improve the working efficiency by increasing the traveling speed to about twice or more of the conventional speed.

Further, the rear end of the rotary cover (30) above the rotary pawl (29) is connected with a first steel plate rear cover (40) so as to be vertically swingable through a first fulcrum shaft (39), 1 The front end of the rubber rear cover (41) is fixed to the rear end of the rear cover (40), and the front end of the second rear cover (43) made of steel plate is fixed to the rear end of the rubber rear cover (41) that forms a leveling space (42) downward. , A second fulcrum shaft (44) at the rear end of the first rear cover (40) and a third fulcrum shaft (45) at the front end of the second rear cover (43) are connected by a pair of left and right links (46) (46), Third fulcrum axis (4
5) is provided substantially coaxially with a fourth fulcrum shaft (47), the lower end of the first suspension rod (48) is connected to the fourth fulcrum shaft (47),
The lower ends of the pair of left and right second suspension rods (50) are connected to the fifth fulcrum shaft (49) at the rear end of the second rear cover (43), and the first and second support members (51) of the first rear cover (40) are connected to each other. Second
The upper ends of the hanging rods (48) (50) are mounted so as to be able to move up and down, and the hanging rods (48) (50) and the second rear cover (43) form a side view triangle. A side view triangle is formed by a line connecting the five fulcrum shafts (44), (45) and (49), and the second rear cover (43) is centered on the second fulcrum shaft (44) or the third fulcrum shaft (45). Is moved upward, and the cover (43) and each rod (48) with the second fulcrum shaft (44) and the suspension rod (48) (50) connecting portion of the support (51) as a fulcrum.
Each rod (48) is moved by the operation of the lever mechanism of (50).
The second rear cover (43), whose forward movement is restricted by the downward bulging of (50), is moved rearward and upward so that both side portions of the second rear cover (43) perform a floating operation of moving back and forth in plan view. Also, the fifth fulcrum shaft (49) and the first
A pair of left and right gas dampers (52) are connected between the support bodies (51) of the rear cover (40), and the second rear cover is provided by the gas damper (52) that can obtain a substantially constant spring constant for the entire stroke and can form a large stroke. (4
Even if the tractor (1) is tilted to the left or right,
The rear cover (43) is configured so that the tilling surface can be leveled by evenly pressing the left and right sides.

Further, the lower limit of the suspension rods (48) (50) is inserted into the bearing bodies (53) of the supports (51) ... The stoppers (54) are fixed to the rods (48) (50) to prevent the rods (48) (50) from being pulled out downward.
While restricting the forward movement of the second rear cover (43),
The lower ends of the pair of left and right suspension rods (56, 56) wound with the springs (55, 55) are attached to the first rear cover (4).
0) The rod (56) is connected to the upper surface, the upper end side of the rod (56) is slidably attached to the support (57) of the rotary cover (30), and the first rear cover (40) is pressed downward by the spring (55). Is configured.

Further, the rake support (58) is detachably fixed to the upper surface of the second rear cover (43), and the rake (59) fixed to the support (58) is extended to the rear of the third rear cover (43). The second suspension rod (5
0) The upper end of the gas damper (52) is connected to the shaft (61) of the support body (51) to which the upper end side is attached, and the second suspension rod (50) and the gas damper (52) are made as close as possible to each other and are substantially parallel to each other. It is provided in.

Further, the first fulcrum shaft (39) is attached at a position substantially the same as or higher than the upper end of the rotary locus of the rotary pawl (29), and the rear cover is centered on the first fulcrum shaft (39) during the plowing work. As (40), (41) and (43) rise, a large-area equalizing space (42) is formed below the rear covers (40), (41) and (43) behind the rotary locus of the rotary pawl (29). Rear cover (40) (4
1) (43) pushes the soil forward with rotary claws (2
It is configured so as to prevent the soil jumping up portion of 9) and to prevent an increase in the tilling load of the rotary claw (29) due to the tilling work at a high speed.

As shown in FIGS. 1, 4, and 6-8,
A lock device (60) for fixing the first and second rear covers (40) (43) at the lower limit operating position is provided.
The upper end side of the rods (50) (56) is attached to the bearing body (53).
The rear cover fixing second and first brackets (63) (64), which are lock members, are rotatably attached to the support shafts (61) (62) of the respective supports (51) (57) slidably supported by
And a return spring (65) which is attached between the supports (51) (57) and the brackets (63) (64) at all times.
The spring force in the clockwise direction in the figure is biased by the (66) around the support shafts (61) and (62), and the bracket (6
3) It is configured to keep (64) in the unlocked posture. Further, a lock operation lever (68) is provided on the mast (67) connecting the top link (13), and the operation lever (68) and the first bracket (64) are interlockingly connected by an operation wire (69). , The second bracket (6
The other end of the lock rod (70), one end of which is connected to 3), is slidably engaged and connected to the long hole (72) of the fixing piece (71) of the first bracket (64), and the rear cover ( 40, 41, and 43 are vertically movable. Then, by the operation lever (68), the wire (6
9) Pull the first bracket (64) as shown in FIG.
Lock rod (70) when rotating counterclockwise
The fixing piece (71) is brought into contact with the locking pin (70a) at the other end, and the rod (70) is pulled to pull the second bracket (6).
3) by rotating the brackets (64) (6
The ceiling plate parts (64a) (63a) of 3) are attached to the suspension rods (5
6) Face the upper part of (50) above,
The top plates (64a) (63a) restrict the upward movement of the suspension rods (56) (50) to keep the first and second rear covers (40) (43) fixed at this lower limit working position. Is configured as follows. The bracket (6
3) The structure in which (64) is interlockingly connected via the lock rod (70) is shown, but the structure may be interlockingly connected by a wire.

9 to 15 show the suspension rods (56) in the raised position of the first and second rear covers (40) (43).
An upper limit lock device (75) for locking and holding (50) is provided at the tip of each support (51) (67), and is mounted on the support shafts (61) (62) of the support (51) (57). The body (76) and the bolt (76
Lock case (77) that is detachably fixed via a)
And a collar body (78) slidably supported by the case (77), and a lock for slidably fitting the inner diameter portion of the collar body (78) to project the tip to the outside of the case (77). The pin (79) is interposed between the collar body (78) and the lock pin (79) so that the tip of the pin is always the case (77).
A lock release spring (80) for retracting to the side, and a lock spring (which is interposed between the case (77) and the collar body (78) to normally move the collar body (78) in the extension direction of the pin (79) ( 81) and a substantially ring-shaped pulling fitting (82) for attaching the linear shaft portion (82a) at the base end to the collar body (78).
And a bent piece (83) on the side of the pin (79) retracting side of the case (77) to hold the shaft (82a) of the pulling metal fitting (82) in engagement when the pin (79) is unlocked. When the lock release groove (84) and the rods (50) (56) are opened, the pins (7) are moved when the covers (40) (43) are lifted.
This lock device (75) is composed of a lock hole (85) into which 9) can be inserted. Reference numeral (86) is an insertion hole for a pin (79) opened in the frame body (76).

As shown in FIGS. 11 and 13, when the tension fitting (82) is pulled against the spring (81) to engage with the groove (84), the pin (79) is moved to the spring (80). The lock hole (85) and the pin (79) are retracted to a position where they are brought into contact with the shaft portion (82a) of the metal fitting (82) by force.
While holding the locks with and in the released state, when the covers (40) (43) are raised as shown in FIG. 14 and the pulling fitting (82) is removed from the groove (84) and rotated by about 90 °, The front end of the collar body (78) is pressed against the top body (76) by the force of the spring (80), and the pin (79) is inserted into the lock hole (85).
0) The lock is held at the raised position of (43).

Further, as shown in FIG. 15, when the pulling metal fitting (82) is pulled from this lock holding state to perform the lock releasing operation, the pin (79) which engages and abuts the hanging rods (50) (56). ) On the rear cover (40) (4
3) The weight acts, and the frictional force prevents the pin (79) from retracting to maintain the locked state. However, the lock pin (79) is slightly lifted to operate the lock pin (79). Is to be retracted by the force of the release spring (80) to release the lock.

As described above, when the pulling metal fitting (82) is removed from the release groove (84) of the case (77) and rotated by about 90 °, the pin is automatically pinned when the rear cover (40) (43) is lifted. (79) is inserted into the lock holes (85) of the rods (50) and (56) for locking,
When the pulling metal fitting (82) is again engaged with the release groove (84) and the rear covers (40) (43) are slightly lifted, the lock is released, and the rear cover (40) is released.
(43) It is possible to remarkably improve the workability and handleability in the case of performing maintenance and inspection or soil removal work with the lifted state.

[0020]

As is apparent from the above embodiments, according to the present invention, a first rear cover (40) is provided at the rear portion of the rotary cover (30) and a second rear cover (40) is provided at the rear portion of the first rear cover (40).
Rear cover (43) is arranged so as to be vertically movable 2
A cultivating device having a stepped rear cover is provided with lock members (63) (64) for fixing the first and second rear covers (40) (43) at their lower limit operating positions, respectively. ) Is interlocked with one operation wire (69) for locking and unlocking. Therefore, only by pulling one operation wire (69), the first and second rear covers (40) can be pulled.
Any of (43) can be fixed at the working position, which reduces the operating force and is excellent in handleability.
It has a remarkable effect that the number of parts can be reduced and the structure can be simplified.

[Brief description of drawings]

FIG. 1 is a side view of a rear cover portion.

FIG. 2 is an overall side view.

FIG. 3 is an overall plan view.

FIG. 4 is a side view of a rotary working machine for tillage.

FIG. 5 is an explanatory plan view of a rear cover portion.

FIG. 6 is a side view illustrating a rear cover portion.

FIG. 7 is a side view illustrating a lock rod portion.

FIG. 8 is a rear view of the lock rod portion.

FIG. 9 is a side view of a rotary tillage implement.

FIG. 10 is a side view illustrating a rear cover portion.

FIG. 11 is a side sectional view of the upper limit lock device.

FIG. 12 is a plan cross-sectional explanatory view of an upper limit lock device.

FIG. 13 is a rear cross-sectional explanatory view of the upper limit lock device.

FIG. 14 is an explanatory diagram showing a locked state of the upper limit lock device.

FIG. 15 is an explanatory diagram during unlocking of the upper limit lock device. (30) Rotary cover (40) First rear cover (43) Second rear cover (63) (64) Bracket (lock member) (69) Operation wire

Claims (1)

[Claims] 1. A cultivating device comprising a two-stage rear cover in which a first rear cover is provided at a rear portion of a rotary cover and a second rear cover is provided at a rear portion of the first rear cover so as to be vertically movable. A cultivating device comprising lock members for fixing the rear cover at respective lower limit operating positions, and locking and unlocking the lock members by interlockingly connecting the lock members to one operation wire.