JPH052002Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field The present invention relates to the shape of a tiller claw that can be used in both forward and reverse directions, which is attached to a rotary tiller that is attached to an agricultural tractor or power tiller and is capable of forward and reverse rotation. be.

(b) Prior art Conventional forward and reverse tilling claws are attached to both sides of the center drive type rotor case, and between the base end of the claw body of the forward and reverse tilling claws and the outer periphery of the claw shaft holder,
There was a certain amount of distance between them.

(c) Problems to be solved by the invention However, if there is a gap between the forward and reverse tilling claws and the claw shaft holder as in the past, there is an inconvenience that weeds etc. tend to get caught when performing management work. It was.

(d) Means for solving the problem The present invention is constructed as follows in order to solve the above problems.

In a center drive type tillage device, the machete claws 8 on the normal claw shaft 32 extending from the rotor drive shaft 6 reverse the direction of the claws by replacing the left and right claw shafts 32 to the opposite side during reverse tillage. or,
A tilling claw 7 for both forward and reverse rotation, which does not need to be replaced regardless of forward or reverse rotation, is mounted on an inclined rotary claw seat 31 that is rotatably supported on the rotor drive shaft 6 and rotates along a claw shaft holder 30 fixed to the rotor case 4. In this structure, the forward and reverse tilling claws 7 are fan-shaped parallel to the side surface of the rotor case 4, and the lower edges 7c, 7c of the fan-shaped ones are arranged close to each other along the outer periphery of the claw shaft holder 30. It is something.

(e) Embodiments and operations The purpose of the present invention is as described above, and the structure and operations of the present invention will be explained based on the configuration of the embodiment shown in the attached drawings.

Figure 1 is an overall side view of a tiller equipped with a rotary tiller that can rotate forward and reverse. FIG. 2 is a front sectional view of the rotor case in the rotary tilling device. FIG. 3 is a side view of the forward and reverse tilling claw of the present invention. Figure 4 is also a front view. FIG. 5 is a front view showing an embodiment in which the distance between the pawl and the pawl seat is minimized. FIG. 6 is a front view showing an embodiment in which the distance between the pawl and the pawl shaft is minimized. FIG. 7 is also a side view.

To explain the overall configuration with reference to FIG. 1, 1 is an engine, 2 is a driving mechanism, and 3 is a steering wheel. The rotary tiller R is attached to a hitch at the rear end of the transmission case, and a forward/reverse switching lever 5 is attached to the upper side surface of the rotor case 4. The rotor case 4
A rotor drive shaft 6 projects left and right from the lower end, and the rotor drive shaft 6 is equipped with the forward and reverse tilling claws 7 and machete claws 8 of the present invention. 9
is a tail wheel, and 10 is a tillage cover.

To explain the driving and mounting configuration of the tilling claws with reference to FIG. 2, an input shaft 11 is supported on the upper end of the rotor case 4 via bearings 21 and 22, and the input shaft 11 is protruded from the transmission case of the tiller. connected to the PTO shaft. Further, a forward/reverse switching gear case 12 is attached to the upper side surface of the rotor case 4, and a reverse rotation shaft 13, a switching shifter 14, etc. are housed inside the gear case 12.

That is, a loosely fitted gear 15, a sliding gear 16, and a loosely fitted sprocket 17 are fitted to the input shaft 11.
The loosely fitted gear 15 meshes with a gear 24 fixed to the reverse rotation shaft 13, and has a drive sprocket 19 fixed to the other end. A sprocket 25 is fixed to the reversing shaft 13, and a chain 26 is connected to the sprocket 25 and the loosely fitted sprocket 17. The sliding gear 16 is spline-fitted to the input shaft 11, and the sliding gear 16 is spline-fitted to the input shaft 11.
6 slides, and a forward/reverse switching lever 5 is fixed to the other end of the shifter 14.

With such a configuration, the shifter 14 is slid,
When the internal teeth of the sliding gear 16 and the loose-fit gear 15 are engaged, power is transmitted from the input shaft 11 → the sliding gear 16 → the loose-fit gear 15, and is fixed to the rotor drive shaft 6 from the sprocket 25 via the chain 20. This is transmitted to the provided drive sprocket 27, and the tilling claws rotate in the normal direction. In addition, the sliding gear 16 is loosely fitted into the sprocket 17.
When meshed with the teeth 17a of That's what I do. In this way, simply by switching the switching lever 5, the rotation can be switched between forward rotation and reverse rotation.

The rotor drive shaft 6 is pivotally supported by the rotor case 4 via bearings 29, 29 and pawl shaft holders 30, 30. An inclined rotary pawl seat 31 is fitted onto the rotor drive shaft 6, and pawl shafts 32 are mounted on both sides of the rotor drive shaft 6. It is inserted and fixed with bolts 33. The claw shaft 32 has a claw seat 32a.
is provided protrudingly, and a machete claw 8 is fixed. Then, when performing reverse tillage, the left and right claw shafts 32 are replaced with opposite sides, and the direction of the claws is reversed.

However, there is no need to replace the forward/reverse tilling claw 7 of the present invention, which is fixed to the inclined rotary claw seat 31. The configuration of the forward and reverse tilling claws 7 is as follows.
As shown in FIG. 4, it is fan-shaped, and has a mounting portion 7a projecting from the center of the claw body 7b. The present invention extends the outer periphery of the lower edges 7c, 7c of the claw body 7b to a position close to the claw shaft holder 30 as shown in FIG. It is made into a shape. Then,
If grass or the like enters this gap, it will be cut off at the lower edge 7c by the rotation of the forward/reverse tilling claws 7.

Furthermore, when attaching the forward and reverse tilling claws 7 to the claw shaft 32, as shown in FIGS. 5 to 7, the gap between the claw seat 32a and the claw body 7b is minimized to prevent the intrusion of grass, etc. As shown in FIG. 6, the lower edge 7c of the tilling claw 7 for both forward and reverse rotation may be configured to extend along the claw shaft 32.

(F) Effects of the invention By configuring the invention as described above, the following effects can be obtained from the invention.

First, the tilling claws 7 for both forward and reverse rotation are attached to the rotor case 4.
Since it is fan-shaped along the side surface of the fan, the same rotational state can be obtained in both forward and reverse rotations, so there is no need to change the attachment between forward and reverse rotations.

Second, since the forward and reverse direction tilling claws 7 are fan-shaped, grass straw that attempts to enter between the rotor case 4 and the forward and reverse direction tillage claws 7 is prevented.
Furthermore, mud adhering to the side surface of the rotor case 4 can be scraped off.

Thirdly, since the lower edges 7c, 7c of the claw body are extended to the claw shaft holder 30, grass etc. may get in, and
Even when it wraps around the nail shaft holder 30, it is cut at the lower edges 7c, 7c, thus preventing it from entering.

[Brief explanation of the drawing]

Figure 1 is an overall side view of a tiller equipped with a rotary tiller that can rotate forward and reverse. FIG. 2 is a front sectional view of the rotor case in the rotary tilling device. FIG. 3 is a side view of the forward and reverse tilling claw of the present invention. Figure 4 is also a front view. FIG. 5 is a front view showing an embodiment in which the distance between the pawl and the pawl seat is minimized. FIG. 6 is a front view showing an embodiment in which the distance between the pawl and the pawl shaft is minimized. FIG. 7 is also a side view. 7... Forward and reverse dual use tilling claw, 7b... Claw body, 30
...Claw shaft holder.

Claims (1)

[Scope of utility model registration request] In a center drive type tillage device, the machete claws 8 on the normal claw shaft 32 extending from the rotor drive shaft 6 reverse the direction of the claws by replacing the left and right claw shafts 32 to the opposite side during reverse tillage. or,
A tilling claw 7 for both forward and reverse rotation, which does not need to be replaced regardless of forward or reverse rotation, is mounted on an inclined rotary claw seat 31 that is rotatably supported on the rotor drive shaft 6 and rotates along a claw shaft holder 30 fixed to the rotor case 4. In this configuration, the forward and reverse tilling claws 7 are shaped like a fan parallel to the side surface of the rotor case 4, and the lower edges 7c, 7c of the fan shape are brought close to each other along the outer periphery of the claw shaft holder 30. This is a tilling claw that can be used in both forward and reverse directions.