JPH05207801A - Rotary tiller - Google Patents

Abstract

PURPOSE:To provide the subject rotary tiller equipped with a land-grading unit at the rear part of a tilling unit and with extensible units capable of changing their posture from an extended posture to a folded posture on both the sides of the land-grading unit and capable of readily changing the posture of the extensible units. CONSTITUTION:In a rotary tiller equipped with a machine frame elevatably attached to the rear part of the tractor, with a land-grading unit 30 attached to the machine frame, arranged at the rear part of a tilling unit and capable of grading the field and with extensible units 31 attached to the land-grading unit 30 and capable of changing their posture from an extended posture projecting in the outside right and left directions to a folded posture at a position above the land-grading unit 30, a control lever 50 is attached to the upper front part of the machine frame and the extensible units 31 are linked through cables 42 and 43 to the control lever 50 so as to change the posture of the extensible units 31 by the control lever 50.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tiller cover device for a tiller mounted on the rear portion of a tractor.

[0002]

2. Description of the Related Art Generally, a cultivator is mounted on a rear portion of a tractor so as to be vertically movable via a three-point link mechanism. Further, a rear cover for covering the rear of the tiller is provided on the machine frame of the tiller, and a leveling part for leveling the field is provided under the rear cover. And on the left and right ends of this leveling section,
There is an extension posture that can be freely changed between the extended posture that protrudes outward in the left-right direction from the soil leveling section and the folding posture that is located above the soil leveling section. , If not required, it is in a folded position.

[0003]

SUMMARY OF THE INVENTION In the above-mentioned conventional apparatus, an operator descends from the tractor and operates to extend the ground leveling portion and fold the extension portion. The operation of changing the posture of was complicated and troublesome. Therefore, an object of the present invention is to make it possible to easily perform a posture changing operation of the extension part of the ground leveling part.

[0004]

[Means for Solving the Problems] The technical means taken by the present invention to achieve the above-mentioned object is provided with a machine frame 2 which is mounted on a rear part of a tractor so as to be able to move up and down.
11 is provided at the rear of the field to level the field,
In the rotary cultivator provided with the extension part 31 in the leveling part 30 so that the extension part 31 protrudes outward in the left-right direction from the leveling part 30 and the folding position located above the leveling part 30, the machine frame 2 The operating means 50 is provided in the front upper part of the operating means 50, and the operating means 50 and the extending portion 31 are interlockingly connected by the interlocking means 42, 43 in order to change the posture of the extending portion 31 by the operating means 50.

In addition to the above construction, the interlocking means is composed of cables 42 and 43, and the cables 42 and 43 are connected to the tiller 11
It is preferable to pass through a hollow reinforcing member 20 provided from the upper part to the lower part on the back surface of the rear cover 14 that covers the rear of the.

[0006]

[Operation] The posture changing operation of the extension portion 31 is operated by the operation means 50 provided at the upper front part of the machine frame 2, and the rotary cultivator is lifted to bring the operation means 50 closer to the tractor side to get on the tractor. The posture changing operation of the extension portion 31 can be performed while keeping the state, and the posture changing operation is easy.

Further, in claim 2, the operating means 50 and the extension portion
Since the interlocking means for interlocking with 31 is constituted by the cables 42 and 43 and the cables 42 and 43 are passed through the reinforcing member 20, the cables 42 and 43 are protected and the cables 42 and 43 are also protected. No additional support member is required to support.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 3, reference numeral 1 is a rotary cultivator mounted on the rear part of the tractor so as to be able to move up and down through a three-point link mechanism. The machine frame 2 of this rotary cultivator 1 has support arms 4 protruding from the center gear case 3 to the left and right, and the side frame 5 is fixed to the outer end of one support arm 4 and the outer end of the other support arm 4 is fixed. The chain case 6 is fixed and the main structure is a gate type. The machine frame 2 is attached to the three-point link via a top mast 7 protruding from both left and right sides of the gear case 3 and a bracket 8 fixed to each support arm 4.

A pawl shaft 9 is rotatably installed between the side frame 5 and the lower part of the chain case 6, and a large number of plowing pawls 10 are mounted on the pawl shaft 9 to form a plowing part 11. The cultivating part 11 is covered with a cultivating cover device 12. The cultivating cover device 12 includes a main cover 13 that covers the upper part of the cultivating part 11, a rear cover 14 whose upper end is rotatably attached to a rear end of the main cover 13, and left and right sides of the cultivating part 11. It is composed of front and rear side covers 15 and 16. Hollow reinforcing members 20 are fixed to both left and right sides of the rear cover 14 from the upper portion to the lower portion.

The rear cover 14 is pressed downward by a pair of right and left lowering mechanisms 17 provided on the back side. Down mechanism 17
The rod 18 is composed of a rod 18, a coil spring 19 for hitting the rod 18 which is fitted over the rod 18, and stoppers 24 provided above and below the rod 18. The upper end of the rod 18 is pivotally attached to the upper bracket 21 fixed to the main cover 13, and the lower part of the rod 18 is in the left-right direction via the lower bracket 22 at the intermediate portion of the reinforcing member 20 as shown in FIG. A support shaft 23 that is rotatable about its axis
The rod 18 is inserted into the shaft so as to be movable in the axial direction. The stopper 24 includes a tubular portion 25 fitted over the rod 18, an operating portion 26 protruding from the tubular portion 25, and an engagement pin 27 housed in the operating portion 26.
And a spring 28, the engagement pin 27 engages with the engagement recess 29 of the rod 18, and the position of the stopper 24 is regulated.
By rotating 26 around the rod 18, the engagement pin 27 is disengaged from the engagement recess 29, and the stopper 24 is movable in the axial direction of the rod 18. The axial length of the tubular portion 25 is such that when the operating portion 26 is gripped and the tubular portion 25 is moved in the axial direction of the rod 18, the tubular portion 25 tilts forward in the moving direction, and the tubular portion 25 The edge portion of the inner peripheral surface of is formed with a sufficient length so as not to bite into the rod 18.

As shown in FIG. 5, the rear end side of the rear cover 14 is formed in a curved shape toward the lower side, and serves as a leveling section 30 for grounding the field by landing on the field. As shown in FIG. 1 and FIG.
As with 30, a curved extension 31 is provided.
The extension portion 31 is fixed to a mounting bracket 34 that is rotatably supported by a support shaft 33 that is axially supported by a pair of upper and lower support brackets 32 on the left and right end portions of the ground leveling portion 30,
One mounting bracket 34 is an arm 35 fixed to the support shaft 33.
Bolts 36 are fixed to the
It is rotatably attached and supported around the axis of 33. Also,
A tension spring 37 is stretched over the extension part 31 and the leveling part 30,
The spring force of the spring 37 causes the left and right inner end surfaces of the extension portion 31 and the left and right outer end surfaces of the ground leveling portion 30 to abut against each other, so that the extension portion 31 projects laterally outward from the ground leveling portion 30. In the extended posture, the extension portion 31 is biased toward the ground side to hold the posture,
In the folded posture in which the extension portion 31 is rotated to be located above the ground leveling portion 30, the extension portion 31 is biased toward the ground leveling portion 30 side to maintain the posture, and the extension portion 31 is in the extension position. The posture can be freely changed to a folding posture.

The support shaft 33 comprises a peeling shaft 33a and a cylindrical shaft 33b. A pulley 38 is spline-fitted to the peeling shaft 33a.
The pulley 38 is covered with a case body 40 which can be opened and closed by a lid body 39. The case body 40 is fixed to the ground leveling section 30. In the case body 40, a pair of cables 42, 43
One end of the (interlocking device) is inserted and wound around the pulley 38 in opposite directions, and the ends of the cables 42 and 43 are locked to the locking portion 41 of the pulley 38. These cables
One of 42 and 43 is used for folding the extension 31, and the other 42
Numeral 43 is for expanding the extension portion 31.

The respective cables 42, 43 are covered with a flexible coating pipe outside the case body 40, and as shown in FIGS. 1 and 2, pass through the case body 40 and the reinforcing member 20. , Passes through the inside of the upper bracket 21 that supports the lowering mechanism 17, and reaches the vicinity of the gear case 3 of the machine frame 2. Mounting parts 44 are integrally formed at the rear parts of the left and right top masts 7 provided on the left and right sides of the gear case 3, and as shown in FIG. A case body 46 is provided. The case body 46 is provided with a support shaft 47 that is rotatable about the axis in the left-right direction, and a pulley 48 that is spline-fitted to the support shaft 47 is housed therein. Then, in the case body 46, the cable
The other ends of 42 and 43 are inserted and wound around the pulley 48 in opposite directions, and each end is locked to a locking portion 49 of the pulley 48. Further, the support shaft 47 is projected inward in the left-right direction from the case body 46, and the operating lever 50 (operating means) is fixed to this protruding portion.

In the above structure, when the operating lever 50 is rotated while the extending portion 31 is in the extended posture, the operating lever 50 is rotated.
The pulley 48 on the side rotates, the cable 42 for folding operation is wound around the pulley 48, and the cable 43 for unfolding operation is unwound from the pulley 48, while the pulley 38 on the extension 31 side
The cable 43 for unfolding operation is wound up and the cable 42 for folding operation is unwound, the pulley 38 is rotated, and the extension portion 31 is supported via the support shaft 33, the arm 35, and the mounting bracket 34. The extension part 31 is folded around the shaft 33 by turning to the leveling part 30 side. Further, when the operation lever 50 is rotated in the opposite direction to the extension portion 31 in the folded posture, the extension portion 31 is unfolded by the operation reverse to the above-mentioned operation to be in the extension posture. Therefore, by raising the rotary cultivator 1, the left and right extension portions 31 can be independently changed to the extended posture and the folded posture by operating the operation lever 50 while the tractor is on the vehicle. There is.

The ground leveling part may be formed as a ground leveling plate separately from the rear cover so that it can be directly attached to and detached from the rear cover or the machine frame.

[0016]

According to the present invention, the posture changing operation of the extension portion 31 can be operated by the operation means 50 provided in the upper front part of the machine casing 2, and therefore the machine casing 2 is raised to operate the operation means 50 by the tractor. By approaching the tractor, it is possible to change the posture of the extension 31 while riding on the tractor, and to change the posture of the extension 31, it is not necessary to get off the tractor one by one as in the conventional way. The change operation can be easily performed.

Further, in claim 2, the interlocking means is a cable.
This cable (42) (43) consists of (42) and (43).
The rear cover (14) covering the rear of (1) is passed through the hollow reinforcing member (20) provided from the top to the bottom on the back surface of the rear cover (14), so that the cables 42, 43 can be protected and the cables 42, 4 can be protected.
This has the effect that a support member for supporting 3 is not required separately.

[Brief description of drawings]

FIG. 1 is a rear view showing a main part.

FIG. 2 is a schematic side view showing a main part.

FIG. 3 is an overall side view.

FIG. 4 is a rear sectional view of a main part.

FIG. 5 is a side sectional view of a main part.

FIG. 6 is a rear sectional view of a main part.

FIG. 7 is a sectional view of a stopper of the lowering mechanism.

[Explanation of symbols]

 2 Machine frame 11 Tillage section 14 Rear cover 20 Reinforcing member 30 Leveling section 31 Extension section 42 Cable (interlocking means) 43 Cable (interlocking means) 50 Operating lever (operating means)

Claims (2)

[Claims] 1. A machine frame (2) mounted on the rear part of a tractor so as to be able to move up and down, and the machine frame (2) is arranged behind the tiller section (11) to level the field. ) Is provided on the leveling section (30), and the extension section (31) can be changed between an extended position in which the extension section (31) protrudes outward in the left-right direction from the leveling section (30) and a folding position located above the leveling section (30). In the rotary cultivator provided in, the operating means (50) is provided on the front upper part of the machine frame (2), and the posture changing operation of the extension part (31) is performed by the operating means (50)
A rotary tiller, characterized in that the operating means (50) and the extension portion (31) are interlockingly connected by interlocking means (42) (43). 2. The interlocking means comprises cables (42) (43),
The cable (42) (43) is characterized in that it is passed through a hollow reinforcing member (20) provided from the upper part to the lower part on the rear surface of the rear cover (14) covering the rear of the tillage part (11). The rotary tiller according to claim 1.