JPH0646882B2 - Tillage mowing equipment - Google Patents

Description

Detailed Description of the Invention [Industrial applications]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tillage mowing device using a rotary working machine, and more particularly, to a tilling mowing device capable of performing tilling work when a rotary shaft rotates in the forward direction and performing mowing work when rotating in the reverse direction by one rotary working machine. It is a thing.

[Prior art]

There is a rotary shaft of a rotary working machine which is configured to be capable of normal and reverse rotation. For example, as is apparent from Japanese Utility Model Laid-Open No. 59-73104 and Japanese Utility Model Laid-Open No. 60-33805, a rotary shaft capable of normal and reverse rotation. It is known that a shaft is provided with a pawl having blade edges formed on both outer peripheral portions of the forward and reverse rotations via a pawl mounting portion so as to be swingable with respect to the rotational direction. By rotating the rotary shaft in the forward direction, so-called downcut direction such as tilling, crushing, and scraping can be performed.
Further, by rotating the rotary shaft in the reverse direction, so-called upcut direction tilling and crushing work can be performed by one rotary working machine.

[Problems to be Solved by the Invention]

However, in the conventional rotary working machine described above, there is an advantage that the so-called upcut and downcut bidirectional cultivating and crushing work can be carried out only by rotating the rotary shaft in the forward and reverse directions. , Or only scraping work, for example, it was not possible to mow work such as tall weeds before plowing. That is, the rotation speed of the rotary shaft in the conventional rotary working machine is set according to the work such as tilling, crushing soil, or scraping (for example, 200 to 300 rpm), and the high rotation speed required for mowing work (for example, 800 rpm). There is a problem that you can not get). The present invention has been made in view of the above circumstances,
An object of the present invention is to provide a tillage mowing device capable of performing stable tillage work and mowing work with one rotary working machine.

[Means for Solving the Problems]

According to the present invention to achieve the above object, in the rotary working machine 1 in which the rotary working unit is capable of normal and reverse rotation, the rotary working unit performs forward and reverse rotation to perform mowing work. Set the rotation speed suitable for work to a high rotation speed suitable for mowing work during reverse rotation, and install the tip part on the claw attachment part 21 that is fixed to the outer circumference of the rotary shaft 18 so as to project in the radial direction. The base portion of the pawl 23 that is bent to the side and has blade edges formed on both outer peripheral portions of the forward and reverse rotations is pivotally supported so as to be swingable back and forth via a pivot support bolt 22, and the side surface of the base portion of the pawl 23 is provided with a leaf spring 25. Via the claw mounting part
Provided on the side surface of 21 is a stopper 24 that abuts at a position where a predetermined cutting angle δ is obtained when the claw 23 is normally rotated, and when the claw 23 is reversely rotated, the claw 23 is stopped at a fixed position in the radial direction by a centrifugal force generated by the rotation of the claw 23 itself. In addition, the center of the mounting hole of the pawl 23 is set so as to be displaced toward the stopper 24 side by a predetermined distance from the center line passing through the center of gravity G of the pawl 23, and when the pawl 23 is rotated in the reverse direction, the bent portion of the pawl 23 is bent. It is characterized in that a predetermined cutting angle α is formed between the back surface m and the tangent line n of the rotation locus of the outermost edge of the claw 23.

[Action]

Based on the above configuration, according to the tillage mowing device of the present invention, the claw attached to the rotary shaft has a shape having both functions of tilling and mowing, and when performing the tilling work by rotating the rotary shaft in the forward direction. , The rotary shaft rotates at a low speed suitable for tillage work, and the pawls pivotally supported by the pawl mounting portion of the rotary shaft rotate in the direction to receive the reaction force and are securely fixed by the stoppers that maintain a predetermined cutting angle. In addition, when performing mowing work by rotating the rotary shaft in the reverse direction, the rotary shaft rotates at high speed suitable for mowing work, and the claw pivotally supported by the claw mounting part can swing in the rotation direction away from the stopper. It stops at a fixed position by the centrifugal force of rotation of the nail itself. Therefore, by selecting the forward or reverse rotation direction of the rotary shaft, the rotary shaft rotates at a rotation speed suitable for tillage work or mowing work, and the position of the pawl is automatically set according to the rotation direction of the rotary shaft. The desired work is smoothly and stably performed.

【Example】

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic configuration diagram of a main part showing a power transmission mechanism of a tillage mowing device according to the present invention, and FIGS. 2 (a) and 2 (b) are side views of a claw attachment part showing a rotary shaft of FIG. FIG. 3 is a side view of a main part showing a tilling work by the rotary working machine of the present invention,
FIG. 4 is a side view of an essential part showing the same mowing work, and FIG.
(a), (b) are front and side views of the nail according to the present invention,
The figure is a side view showing a conventional mower claw for mowing. In FIG. 1, a rotary working machine denoted by reference numeral 1 is mounted on a rear portion of an agricultural tractor through a three-point link hitch mechanism so as to be able to move up and down, and a carrier box 2 is provided at a central portion of the body. An input shaft 3 is provided in the gear box 2 so as to project forward, and is connected to a PTO shaft of a tractor via a transmission shaft, a universal joint, etc., and a driving force is transmitted. A bevel gear 4 is attached to the tip of the input shaft 3 and meshes with a bevel gear 6 attached to the end of the intermediate shaft 5. Gears 7 and 8 are fixed to the intermediate shaft 5, a normal rotation gear 9 having a large reduction ratio is geared to the gear 7, and a reverse rotation gear 11 is constantly meshed with the gear 8 through an intermediate gear 10 to ensure the normal gear. The rotary gear 9 and the reverse gear 11 are attached to the transmission shaft 12 so as to be rotatable at all times. A sliding gear 13, which rotates integrally with the transmission shaft 12 by a spline or the like and is slidable, is mounted between the forward rotation gear 9 and the reverse rotation gear 11 and protrudes from the gear box 2. The installed shift lever 14 is adapted to transmit the rotational force on the forward or reverse rotation side to the transmission shaft 12. The transmission shaft 12 extends through a transmission frame into a chain case 15 provided at one end of the machine body, and a sprocket 16 in the chain case 15 and a support frame attached to the opposite end of the chain case 15. Chain 20 is installed between sprocket 19 and rotary shaft 18
Is stretched, and the driving force of forward rotation or reverse rotation is selectively transmitted to the rotary shaft 18. On the other hand, as shown in FIGS. 2 (a) and 2 (b), the rotary shaft 18 is fixed to the outer periphery of the rotary shaft 18 so as to project in the radial direction, and is fixed at a predetermined interval in the lengthwise direction so that the pawl mounting portion is provided. 21 are provided. The claw mounting portion 21 is a rectangular shape that extends symmetrically in a direction orthogonal to the rotary shaft 18, and the claw 23 is attached to each outer end portion via a pivot pin or bolt 22 in the rotation (front-back) direction. It is swingably supported. The nail 23 has
As shown in FIGS. 5 (a) and 5 (b), the tip end side is bent to one side from the vertical blade portion 23a to form an L-shaped lateral blade portion 23b, and the vertical blade portion 23a to the horizontal blade portion 23b are formed. A blade edge 23c is formed on the side edges in both the forward and reverse rotation directions. A mounting hole 23d is formed in the claw 23 and is pivotally supported by the claw mounting portion 21 via a bolt 22.
Further, the pawl mounting portion 21 to which the pawl 23 is attached is provided with a stopper 24 that comes into contact with the side surface of the base of the pawl 23 when the rotary shaft 18 rotates in the forward rotation (solid line) direction and restricts the rotation of the pawl 23. When the rotary shaft 18 rotates in the reverse direction (in the direction of the dotted line), the claw 23 separates from the stopper 24 and rotates about the pivot bolt 22 and the center of gravity G is stopped by the centrifugal force at a fixed position in the radial direction. It is designed to be held at. In the above configuration, when the rotary shaft 18 is rotated in the reverse direction for mowing work with the pawl 23 attached to the pawl mounting portion 21, the pawl 23 becomes free with the pivot bolt 22 and is radiated by centrifugal force. Although it stops at a fixed position in the direction, when it is rotated forward for plowing work, the number of rotations is low, the torque fluctuation applied to the claw 23 is large, and the plowing performance such as reversing and plowing the cultivated soil by the claw 23 can be used to some extent. Since it must be securely fixed with a cutting angle δ of, the reaction force of the pawl 23 in the rotational direction is received by the stopper 24, and the backlash in the lateral direction is, for example, the leaf spring 25 that is fastened together with the pivot bolt 22. It is suppressed by etc. Further, in the rotary working machine 1 including the rotary shaft 18, covers 26 and 27 suitable for working are attached to a front portion and a rear portion. Further, in order to facilitate the mowing work with the claw 23, as shown in FIG. 5 (b), the center point O of the mounting hole 23d is displaced amm from the center of gravity G on the center line L of the claw 23. Therefore, the back surface m of the bent portion of the claw 23 has a cutting angle α with respect to the tangent line n of the rotation locus of the outermost edge of the claw 23. Therefore, the back surface m of the bent portion of the claw 23 can reduce the escape of the blade without coming into contact with the unevenness of the ground surface or stones, and prevent uncut areas. Compared to a mower blade or a normal blade (α = 0), it is possible to easily cut the root of grass. Next, the work by the tillage mowing device configured as described above will be described. First, when a driving force is input to the input shaft 3 from the PTO shaft of the tractor, the intermediate shaft 5 rotates and the shift lever 14 is operated in the forward direction to rotate the rotary shaft 18 in the forward direction. In the state where the pawl mounting portion 21 is brought into contact with the stopper 24 and the rotation thereof is restricted, it is possible to cultivate a field like a well-known tillage claw. At this time, the reverse gear 11 via the intermediate gear 10
A normal rotation gear 9 that idles on the transmission shaft 12 and meshes with the gear 7.
Since the sliding gear 13 meshes with the shaft to rotate the transmission shaft 12, the chain 20 stretched between the sprocket 16 and the sprocket 19 of the rotary shaft 18 rotates the rotary shaft 18 at a predetermined rotation speed. Next, operate the shift lever 14 to the reverse rotation side to rotate the rotary shaft 18
If the claw 23 is rotated in the reverse direction, the claw 23 turns around the pivot bolt 22 to be in a free state, and the claw 23 is stopped at a fixed position in the radial direction by the centrifugal force due to the rotation of the claw 23 itself, so that weeds and the like can be removed from the conventional flare blade,
It can be cut like a mower blade. In the embodiment according to the present invention, it is desirable that the rotational speed of the rotary shaft 18 is 200 to 300 rpm when the rotary shaft 18 is normally rotated and about 800 rpm when the rotary shaft 18 is reversely rotated.

【The invention's effect】

As described in detail above, according to the present invention, the rotary shaft of the rotary working machine can be rotated at a high speed suitable for mowing work at the time of reverse rotation, and the shape of the claw can be cultivated at the time of forward rotation and reverse rotation. It is sometimes adapted to mowing work, and one rotary working machine can perform work for two machines, namely tilling work and mowing work. Further, since the work can be switched with one touch by operating the shift lever, the labor and time for changing the working machine can be greatly reduced, which is efficient and economical.
Furthermore, during cultivating work with a high work resistance, lateral play is suppressed by a leaf spring or the like, and stable work can be performed.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a main part showing a power transmission mechanism of a tillage mowing device according to the present invention, and FIGS. 2 (a) and 2 (b) are side views of a claw attachment part showing a rotary shaft of FIG. FIG. 3 is a side view of an essential part showing a cultivated state by the rotary working machine of the present invention, FIG. 4 is a side view of an essential part showing the same mowing state, and FIG.
(a), (b) are front and side views of the nail according to the present invention,
The figure is a side view showing a conventional rotary mower blade. 1 ... Rotary work machine, 2 ... Gear box, 3 ... Input shaft, 4 ... Bevel gear, 5 ... Intermediate shaft, 6 ... Bevel gear,
7, 8 ... Gear, 9 ... Forward gear, 10 ... Intermediate gear, 11
...... Reverse rotation gear, 12 ...... Transmission shaft, 13 ...... Sliding gear, 14 ......
Shift lever, 15 …… Chain case, 16 …… Sprocket, 17 …… Support frame, 18 …… Rotary shaft, 19 ……
Sprocket, 20 …… Chain, 21 …… Claw mount, 22
...... Pivot bolt, 23 ...... Claw, 23a …… Vertical blade, 23b …… Horizontal blade, 23c …… Blade edge, 23d …… Mounting hole, 24 Stopper, 25
...... Leaf springs, 26, 27 …… Cover, P …… Arc center point, O
... Center point of mounting hole, R ... Radius of base of claw, δ ... Cut angle of claw, α ... Crop angle.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yasuhiro Kobiki 684 Nakamata, Okayama, Okayama Kobashi Kogyo Co., Ltd. (56) References JP-A-58-89102 (JP, A) JP-A-62-87006 (JP, A) Actually open Sho 60-33805 (JP, U)

Claims (1)

[Claims] 1. In a rotary working machine (1) in which a rotary working unit is capable of normal and reverse rotation, the rotation of the rotary working unit, which performs normal and reverse rotation to perform tillage mowing work, is set to a rotation speed suitable for tilling work during forward rotation. When rotating in the reverse direction, set it to a high rotation speed suitable for mowing work, and bend the tip part to one side on the claw mounting part (21) that is fixed to the outer circumference of the rotary shaft (18) so as to project in the radial direction. , The base of the claw (23), which has blade edges formed on both outer peripheral parts of the forward and reverse rotations, is pivotally supported by a pivot bolt (22) so as to be swingable back and forth, and the side surface of the base of the claw (23) is leaf spring. The stopper (24) that presses through (25) to suppress the lateral play and abuts the side surface of the pawl mounting portion (21) at a position where a predetermined cutting angle (δ) is obtained when the pawl (23) is rotated forward. ) Is provided so that when the pawl (23) rotates in the reverse direction, the pawl (23) is stopped at a fixed position in the radial direction by the centrifugal force generated by the rotation of the pawl (23) itself.
Set the center of the mounting hole of 3) to the stopper (24) side by a predetermined distance from the center line passing through the center of gravity (G) of the claw (23),
When the pawl (23) is rotated in the reverse direction, the back surface (m) of the bent portion of the pawl (23)
A cultivated grass mowing device characterized in that a predetermined cutting angle (α) is formed between the tangent line (n) of the rotation locus of the outermost edge of the claw (23).