JPS62122504A - Pawl mounting method in plowing and mowing apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a method for attaching claws to a tiller/V-mowing device, and more specifically, to a rotary working machine that can perform tilling work when the rotary shaft rotates in the forward direction and mowing work when the rotary shaft rotates in the reverse direction. This invention relates to a method of attaching a claw to a rotary shaft in a tilling mower, in which the claw is attached to the rotary shaft so as to be able to swing freely in the rotational direction through a section, and the claw can be securely fixed during multing. ,be.

[Prior art 1] There are machines in which the rotary shaft of a 0-tary work machine is configured to be able to rotate in forward and reverse directions. It is known that the claw is attached through a section for forward and reverse rotation, with a claw having blade edges formed on both outer peripheries thereof swingable in the direction of rotation. By rotating the rotary shaft in the forward direction, work such as M1, crushing, etc., which is called the so-called down-cut method, can be performed, and by rotating the rotary shaft in the reverse direction, the work can be performed using the so-called up-cut method. 14 Yes, soil crushing work can be carried out with one rotary work machine. [Problems to be Solved by the Invention] However, with the above-mentioned conventional rotary work machine, it is possible to perform two methods of tillage and frame work, so-called up-cut and down-cut, simply by rotating the rotary shaft in the forward and reverse directions. Although it has advantages, it is limited to the work of tilling, crushing, or puddling the field; for example, it is not possible to perform work such as mowing tall miscellaneous crops before plowing. In other words, the rotational speed of the rotary shaft in conventional rotary work machines is set to match tasks such as tilling, crushing soil, or plowing (e.g., 200 to 3oorpm), and the high rotational speed required for mowing work (e.g., 800ppm
The problem is that it is not possible to obtain >. In addition, the rotary shaft claw attachment is attached to the part. The claws are swingable in the direction of rotation of the rotary shaft, and when performing tillage work by rotating the rotary shaft in the forward direction,
The pawl is attached by making it come into contact with a stopper provided on the part to maintain a predetermined cutting angle, but there is also the problem that the lateral play of the pawl cannot be sufficiently suppressed. - [Objective of the invention 1 The present invention has been made in view of the above-mentioned circumstances, and
In a rotary work machine, the rotation of the rotary shaft is set to a rotation speed suitable for tilling work when rotating in the forward direction, and a high rotation speed suitable for mowing work when rotating in the reverse direction.
The claws attached to the above rotary shaft are securely fixed at a position that provides a predetermined cutting angle suitable for tilling work when rotating in the forward direction, and can swing freely in the direction of rotation when rotating in the reverse direction, using centrifugal force. To provide a method for attaching claws to a tilling and mowing device which is held so as to stop at a fixed position and allows stable tilling and mowing operations to be performed with one rotary working machine. Another object of the present invention is that when the rotary shaft is rotated in the forward direction, the pawl attached to the pawl mounting portion of the rotary shaft can prevent the stopper, which is held at a predetermined cutting angle, from being excessively large during tilling work. To provide a method for mounting a claw in a tilling and mowing device, which is constructed with a shear bolt that is cut against a strong reaction force, and is also tightened by the shear bolt together with a leaf spring that suppresses the lateral play of the claw. [Means for Solving the Problems] In order to achieve the above object, according to the present invention, in a rotary working machine capable of forward and reverse rotation, the rotation of the rotary shaft is
The rotation speed is set so that the rotation speed is suitable for tilling work when rotating in the forward direction, and the rotation speed is set at a high speed suitable for mowing work when rotating in the reverse direction. A blade edge is formed on the part.To install the claw, set the center of the hole a predetermined distance toward the tilling side from the center line passing through the center point of the claw, and rotate the rotary shaft to the tilling state. At this time, the reaction force of the wind is received by a stopper which is fastened together through a plate spring that clamps the side surface of the claw and a shear bolt. [Function 1] Based on the above configuration, according to the method for attaching the claws in the tilling and mowing device of the present invention, the claws attached to the rotary shaft have a shape that has both the functions of tilling and mowing,
When performing tillage work by rotating the rotary shaft in the forward direction, the rotary shaft rotates at a low speed suitable for tilling work, and the pawl attached to the rotary shaft (the pawl pivoted on the pull part) rotates in the direction that receives the reaction force. The position is regulated by a shear bolt that maintains a predetermined cutting angle, and both sides of the pawl are sandwiched between the plate spring and the pawl mounting section, which are tightened together by the shear bolt, and the lateral side of the pawl is In addition, when mowing work is performed by rotating the rotary shaft in the opposite direction, the rotary shaft rotates at a high speed suitable for mowing work, and the pawl attached to the part is pivoted to the stopper. It can swing freely in the direction of rotation and is stopped at a fixed position by centrifugal force. Therefore, by selecting the rotary shaft to rotate in the forward or reverse direction, the rotary shaft will rotate at the appropriate rotation speed for tilling or mowing work. The position of the claw is set automatically by the direction of rotation of the rotary shaft, allowing the desired work to be carried out smoothly and stably. [Example 1] Examples according to the present invention will be described below. This will be explained in detail based on the attached drawings. Fig. 1 is a schematic configuration diagram of the main part showing the power transmission mechanism of the tilling and mowing device according to the present invention, and Fig. 2 (2) (Y) shows the rotary shaft of Fig. 1. Fig. 3 is a side view of the main part showing the tilling state by the rotary work machine of the present invention, Fig. 4 is a side view of the main part showing the same mowing state, and Fig. 5 ( 2) and (b) are a front view and a side view of the claw according to the present invention, and FIG. In the figure, the rotary work indicated by the reference numeral 1! Although not shown, the nine machines are attached to the rear of an agricultural tractor via a three-point link hitch mechanism so that they can be raised and lowered, and a gear box 2 is provided in the center of the machine body. This gearbox 2 has input/sleeve 3
is provided so as to protrude forward, and is connected to the tractor's PTO shaft via a transmission shaft, universal joint, etc.
The driving force is transmitted. A bevel tooth 0!4 is removed at the tip of the input 3, and meshes with a bevel gear G attached to the end of the intermediate shaft 5. A tooth width 7.8 is fixed to the intermediate shaft 5, a forward rotation gear 9 with a large reduction ratio is fixed to the gear 7, and an intermediate gear 9 is attached to the gear 8.
The reverse tooth width 11 is always in mesh with the fI width 10, and the normal rotation gear 9 and the reverse rotation gear 11 are attached to a transmission 112 so as to be rotatable at all times. And above, normal rotation gear 9
A stop gear 13 that rotates integrally with the transmission shaft 12 by a spline or the like and can be moved is attached between the reverse gear 11 and the reverse gear 11. , forward or reverse rotational force is transmitted to the transmission shaft 12. The transmission shaft 12 extends through the transmission frame into a chain case 15 installed at the side end of the fuselage, and connects to a sprocket 16 inside the chain case 15 and a support attached to the opposite end of the chain case 15. A chain 20 is connected between the sprocket of the rotary shaft 18 mounted on the lower part of the frame 17.
is stretched, so that driving force for forward or reverse rotation is selectively transmitted to the rotary shaft 18. On the other hand, on the rotary shaft 18, as shown in the second diagram) and (b), the pawls are attached to the portions 21 at a predetermined interval in the length direction.
is fixed, and this claw attachment part 21 is a rectangular part that extends symmetrically in the direction perpendicular to the rotary axis ↑8,
A pawl 23 is pivotally supported at each outer end via a pivot pin or bolt 22 so as to be swingable in the rotational direction. For the above wind 23, see Figure 5 (to). As shown in (b), the tip side is L from the vertical blade part 23a to one side.
A horizontal blade portion 23b is formed by bending in a character shape, and a blade edge 23c is formed on the side edges in both forward and reverse rotation directions from the vertical blade portion 23a to the horizontal blade portion 23b. Further, the wind 23 has a mounting hole 23d drilled therein, and is pivoted to the claw mounting leno part 21 via a bolt 22. Further, in the molding opening portion 21 to which the wind 23 is attached, there is a stopper that comes into contact with the side surface of the base of the pawl 23 to restrict the rotation of the pawl 23 when the rotary shaft 18 rotates in the forward rotation direction (solid line). 24 is provided, and the rotary shaft 18
When it rotates in the opposite direction (in the direction of the dotted line), the pawl 23 separates from the stopper 24 and rotates around the pivot bolt 22, so that the centrifugal force holds the center of gravity G at a fixed position. Here, in the above configuration, when attaching the claw, the claw 23 is attached to the part 21, and when the rake shaft 18 is rotated in the reverse direction (t) for mowing work, the claw 23 is freed by the pivot bolt 22. It stays in place due to centrifugal force, but when it rotates in the forward direction for tilling work, the rotation speed is low and the torque 'a' applied to the claws 23 is large, and moreover, the claws 23 are unable to turn over and till the tilled soil. In terms of tillage performance, etc., it is necessary to have a certain cutting angle δ and be securely fixed.
25 is designed to break off before the pawl 23 breaks if an excessive reaction force is applied, and the horizontal play of the pawl 23 is suppressed by a leaf spring 26 that is tightened together with the shear bolt 25. . In addition, the rotary machine 1' equipped with the above-mentioned Kawkuri@18 has covers 27 suitable for the work at the front and rear.
2f'l is installed. Furthermore, in order to facilitate mowing work using the wind 23, as shown in FIG. Therefore, the rear surface m of the bent portion of the claw 23 forms a cutting angle α with respect to the normal opening in the direction of centrifugal force. Therefore, the rear surface m of the bent part of the claw 23 can be prevented from coming into contact with irregularities on the ground surface or stones (it is possible to reduce the escape of the blade and prevent uncut leaves), and the base part of the mold 23 can be During work and mowing work, the pivot bolt 22
Since it rotates around point P, it forms an arc with a radius of R, and the hole 23d for installing the claw 23 is located on the center line of the claw 23 passing through the center of gravity G, toward the tilling side. It's off. Figure 6) and (b) are a front view and a side view of the main part showing the claw mounting part of the embodiment of the present invention;
A disc-shaped disc spring 29 is fastened together with the shear bolt 25, which breaks when an excessive reaction force is applied to the base side surface of the shear bolt 25. Unlike the plate spring 26, the disc spring 29 has no directionality, so there is no need to prevent it from rotating, and it is possible to suppress lateral play by holding the side surface of the pawl 23 from any direction. Next, a description will be given of a method of attaching the claws to the tilling and mowing device configured as described above. First, when driving force is input to the input shaft 3 from the PTO shaft of the tractor, the intermediate shaft 5 rotates, and when the shift lever 14 is operated to the forward rotation side to rotate the rotary shaft 18 in the forward direction, the pawl 2
3 is attached to the stopper 24 of the part 21 and its rotation is restricted, and the field can be tilled in the same way as the tilling claws of the same boat. At this time, the reverse rotation gear 11 is idled on the transmission shaft 12 via the intermediate gear 10, and the normal rotation gear 9 that meshes with the gear 7 is a
! Since the rib gears 13 mesh and rotate the transmission shaft 12, the chain 20 stretched between the sprocket 16 and the sprocket 19 of the rotary shaft 18
8 at a predetermined number of rotations. Next, when the shift lever 14 is operated to the reverse side and the rotary shaft 18 is rotated in the reverse direction, the pawl 23 rotates around the pivot bolt 22 and becomes a free state, and is stopped in a fixed position by centrifugal force and weeds. etc. can be harvested in the same way as a conventional 7-rail blade or mower blade. In addition, when tilling work is performed by rotating the rotary shaft 18 in the forward direction, the side surface of the claw 23 is held between the leaf spring 26 or the spring 29 with the claw 23 in contact with the stopper 24 of the claw attachment part 21. Lateral play is suppressed. Effects of the Invention As described above in detail, according to the present invention, the rotary shaft of a rotary work machine is configured to be able to rotate at a high speed suitable for mowing work when rotating in reverse, and the shape of the claw is changed so that it can rotate in the forward direction. It is adapted to plowing work at times, and mowing work when rotating in reverse, and one rotary work machine can perform the work of two machines, plowing work and mowing work, and switching between these works is easy. This can be done with one touch by operating the shift lever, which greatly reduces the labor and time required to change work types, making it efficient and economical. In addition, when tilling work is performed by rotating the rotary shaft in the forward direction as in the present invention, the claws come into contact with the shear bolts at the part where the claws are attached, and the sides are protected by the plate springs or disc springs fastened together with the shear bolts. It is held in place and has the effect of suppressing lateral wobbling.

[Brief explanation of drawings]

Fig. 1 is a schematic configuration diagram of the main parts of the assist transmission mechanism of the 11 poop mowing device according to the present invention, and Fig. 2 (2), Φ) is a side view of the claw attachment part showing the rotary shaft of Fig. 1. , Fig. 3 is a side view of the main part showing the tilling state by the rotary cropping machine T1 of the present invention, @ Fig. 4 is a side view of the main part showing the same mowing state,
Figure 5), @ is a front view and a side view of a claw according to the present invention, and Figure 6 (2), crest) is a front view and a side view of a claw attachment part showing another embodiment according to the present invention. 1... Rotary work machine, 2... Gear box, 3...
...Input shaft, 4...Umbrella earn, 5...Intermediate shaft, 6
...Bevel gear, 7.8...Gear, 9...Normal rotation gear,
10... Intermediate gear, 11... Reverse tooth width, 12...
Transmission shaft, 13...Sliding gear, 14...Shift lever
115... Chain case, 1G... Sprocket, 17... Support frame, 18... Rotary shaft, 1
9... Sprocket, 20... Chain, 21...
・Claw installation: 22...Pivot bolt, 23...Claw,
23a...Vertical blade part, 231)...Horizontal blade part, 23c.
...Blade edge, 23d... Mounting hole, 24... Stopper, 25... Shear bolt, 26... Leaf spring, 27
．． 28... Cover, P... Arc center point, 0... Mounting hole center point, R... Radius of base of claw, α... Cutting angle. Patent applicant Kobashi Kogyo Co., Ltd. Agent Patent attorney Makoto Kobashi Ukiyo Patent attorney Shinkoma Murai Figure 2 (α) (b) (α) Figure 6 (α) (b)

Claims (1)

[Claims] In a rotary work machine that can rotate in forward and reverse directions, the rotation of the rotary shaft is set so that when rotating in the forward direction, the rotation speed is suitable for tilling work, and when rotating in the reverse direction, the rotation speed is set at a high speed suitable for mowing work. It is attached via the mounting part,
The center of the mounting hole of the claw, which has blade edges formed on the outer periphery of both forward and reverse rotations, is set to be shifted a predetermined distance toward the tilling side from the center line passing through the center of gravity of the claw, and the rotary shaft is in the tilling state. Installation of the claw in a tilling and mowing device characterized in that when the claw rotates, the reaction force of the claw is received by a stopper that is fastened together through a leaf spring that clamps the side surface of the claw and a shear bolt. Method.