JPS6018362B2 - Tiller lifting device for tiller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tiller lifting device for a tiller, which is a kind of agricultural machine, and particularly relates to a device for assisting in raising the tiller when turning.

The tiller's tiller has an arc-shaped blade and the tip is bent at a right angle in the left and right direction, so when turning at the edge of a field, the tiller does not go into the soil. In such a state, there will be a very large resistance, making it difficult to make sharp turns, and there is a risk of damaging the tiller claws.

Therefore, when making such a turn, it is necessary to raise the plowing part using the handlebars, tilt the machine forward, bring the plowing claws out of the soil, interrupt the plowing operation, and turn while operating the side clutch. By the way, the special raising operation of the plowing section in this case has conventionally been left to the manual work of the operator, and for this reason, if the worker's physique is weak, this operation becomes a burden, resulting in insufficient special raising. This caused problems such as damage to the tiller claws and failure to turn smoothly. In addition, as another conventional example, a lifting device was installed at the rear of the aircraft and the rear of the aircraft was lifted by operating a lever on the handle, but this was a structure in which the rear of the aircraft could be raised or lowered rapidly just by operating the lever at hand. Therefore, there was a risk of damage to the tiller claws and the work was dangerous. The present invention is aimed at solving the above problem.The present invention adds a lifting assisting means to the tilling section, and when the tilling section is turned, the reaction force of the pestle is made to protrude downward in the tilling section. The present invention provides a tilling section lifting device for a tiller that facilitates raising. The present invention will be explained in detail below with reference to the embodiments shown in the drawings. In FIGS. 1 and 2, the tiller has an engine 3 mounted in front of a body frame 2 equipped with wheels 1, and a handle 4 attached to the rear. A plowing section 5 is also provided.

The tilling part 5 has a tilling case 6 at the front end, and a tilling claw 7, which has an arc-shaped blade like a sickle and whose tip is bent at a substantially right angle in the left-right direction, is attached for rotation. , tillage claw 7
A cover 8, a side plate 9, and a mud control sheet 10 are installed around the cover 8 to cover it, and a tail wheel 11 is attached to the rear end of the cover 8 so as to be movable up and down with an adjustment handle 12. A tilling case 6 of the section 5 engages with a hitch 13 of the body frame 2 and is detachably connected by a hook lever 14. The power from the engine 3 is transmitted to the wheels 1 by the belt of the main pulley case 15 via the gear mechanism of the transmission case 16, and is transmitted to the tilling claws 7 via the detachable tilling variable case 17 and the chain of the tilling case 6. It is intended to be transmitted to Furthermore, on the side of the handle 4, there is a main clutch lever 18 that disconnects between the engine 3 and the tiller claw 7, and a gear shifter that changes the meshing of the gears in the transmission case 16 to, for example, change three forward speeds and one reverse speed. A lever 19, a dramatic shift lever 20 that selects the belt in the main pulley case 15 on the side of the engine 3 to further shift to higher and lower speeds, and a side clutch in the transmission case are operated to change direction such as turning. A side clutch lever 21 is attached. Therefore, according to the present invention, a means for assisting special raising is added to such tilling section 5, and this will be explained with reference to FIGS. 3 to 5.

The special raising auxiliary means 22 is rotatably supported on a bracket 23 in front of the tiller case 6 inside the cover 8, and a reaction force member 24 bent in a dogleg shape is attached to a ratchet 25 with a bolt 26 and a washer 27. A ground plate 28 is fixed to the lower end of the reaction force village 24, and a fan-shaped locking piece 29 and an arm 30 are integrally provided above the ground plate 28. A ratchet 31 is formed in an arc shape on the locking piece 29, and a continuous rod 34 is connected to a pin 33 having a roller 32 at the tip of an arm 30 that contacts the cover 8.
A strong spring 36 is inserted between the continuous rod 34 and the bracket 35 at the rear of the cover 8. Further, above the locking piece 29 in the bracket 23, a pawl 37 is supported in the same manner as the reaction punch 24 and is provided to engage with the ratchet 31. A return spring 38 is attached to the pawl 37, and a metal fitting is attached to the pawl 37. A wire 40 is disengaged from the lattice 31 via 39 . As a result, during plowing work by normal straight running, the tail wheel 11 is raised and the entire plowing section 5 is lowered so that a part of the plowing claws 7 enters the soil, and the reaction force village 24
is pressed downward and lies in an inclined position as shown by the solid line in FIG.
This state is maintained by the engagement of the spring 36, and the spring 36 becomes fully extended.

By the way, when turning, the wire 4 is activated by operating the lever on the side of the handle 4.
When the claw 37 is pulled out of the ratchet 31 and the tilling section 5 is lifted by the handle 4, the reaction punch 24, which is now in a free state, rotates by the force of the spring 36 as it moves upward. It begins to stand up from a lying position and protrude downward. When the tiller claw 7 is raised sufficiently from the inside, the reaction force lever 24 becomes approximately vertical as shown by the chain line in FIG. is partially supported, and the force that continues to raise the tilling section 5 during turning becomes lighter by this amount. Next, after such turning, the tension on the wire 40 is released to return the pawl 37 to its original state, and when the plowing part 5 is pressed downward so that a part of the plowing pawl 7 enters the soil again, the ratchet 31 With the claw 37 engaged, the reaction force village 24 begins to lie down while rotating in the opposite direction to that described above.
In this way, the reaction force punch 24 and the like automatically return to their original positions, and the tilling operation is restarted. According to the present invention, the tilling section 5
Since the special lifting force is reduced by the lifting assisting means 22, the turning operation becomes very easy, and it becomes easier for workers with less strength to work in sticky paddy fields.

In addition, the clutch can be released by operating the lever on the handle 4.
The structure is such that the reaction force punch 24 protrudes downward by the tension of the spring 36 as the tilling section 5 is lifted, so there is no danger of the tilling section 5 being lifted carelessly, and the work is safe.
Further, due to the protrusion of the reaction force punch 24, the lifting amount of the tilling section 5 is always kept substantially constant, and damage to the tilling window claws 7 is also avoided.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of a tiller according to the present invention;
Fig. 2 is a side view, Fig. 3 is a side view showing the main parts, Fig. 4 is a sectional view taken along the line W-W in Fig. 3, and Fig. 5 is Fig. 3 V.
This is a visual loss diagram. 1...,.・Wheels, 2... Airframe frame, 3...
...Engine, 4...Handle, 5...
・Plowing department, 6...Toughing case, 7...
Tillage claw, 8...Cover, 9...Side plate,
10... Mud control sheet, 11... Tail wheel,
12...adjustment handle, 13...hitch,
14. ...Hook lever, 15...Main pulley case, 16...Mission case, 17...Tillage change far case, 18 None, 21...Lever, 2
2...Special lifting aid means, 23, 35...Bracket, 24...Reaction force punch, 25...Shaft, 26...Bolt,
27... Washer, 28... Ground plate, 29...
... Locking piece, 30 ... Arm, 31 ... Ratchet, 32 ... Roller, 33 ... Pin, 34 ...
...Connecting rod, 36, 38... Spring, 37...
...Claw, 39...Metal fitting, 40"" wire. Fig. 1 Fig. 2 Fig. 3 Fig. 4 Fig. 5

Claims (1)

[Claims] 1 A reaction rod capable of supporting a part of the own weight of the cultivation section when the aircraft turns is provided in the tilling section at the rear of the fuselage frame, and the reaction rod engages with a ratchet provided integrally with this. A tilling part lifting device for a tiller, characterized in that the tilling part can be elastically projected as the tilling part is lifted by the action of claws.