JPS6146282Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention has a rotary case with a power transmission shaft interlocked with the cultivation shaft via a chain attached to the upper end of the rotary case, which has a tillage shaft supported at its lower end, and a transmission shaft that is perpendicular to the power transmission shaft. The present invention relates to a transmission structure of a center drive type tillage rotary device which supports an input shaft of a rotary tiller.

The power transmission structure of such a center drive type tillage rotary device is capable of not only normal tillage by down-cutting, but also cultivation by up-cutting by driving and rotating the tilling shaft in the opposite direction to the above-mentioned direction, cutting furrows, weeding, tilling in hard fields, etc. so that you can do
In order to improve the versatility of the tilling rotary, it is strongly desired that the driving rotation direction of the tilling shaft can be switched between forward and reverse directions.

The purpose of the present invention is to create a forward/reverse switching structure that is simple in structure in order to meet such demands.

In the transmission structure of the center drive type tillage rotary device according to the present invention, in the structure described above, a bevel gear is fixed to the input shaft 6, and the input bevel gear is attached to the input bevel gear by reciprocating and counter-moving in the axial direction of the transmission shaft. a pair of bevel gears that can be selectively interlocked and released from the input bevel gear, and are opposed to each other with the input bevel gear in between, and
The present invention is characterized in that the bevel gears are provided in a state of integral rotation, and that an operating mechanism is provided for moving the pair of bevel gears in opposite directions, and that a sprocket for the chain is provided on a transmission shaft portion between the bevel gears.

That is, by selectively meshing and interlocking a pair of bevel gears with respect to the input bevel gear, the drive rotation direction of the tilling shaft is switched between forward and reverse. is loosely fitted to a third shaft interlocked with a gear to a power transmission shaft interlocked with the tilling shaft via a chain, and furthermore, a third shaft portion between the bevel gear pair is provided with a Compared to the case where a clutch is provided that selectively engages to switch the drive rotation direction of the tilling shaft between forward and reverse,
Since the third shaft and the gear that interlocks the third shaft and the transmission shaft are not required, the transmission structure of the forward/reverse switching mechanism is simplified.

Moreover, since the sprocket for the chain for transmitting power to the tilling shaft is installed between a pair of bevel gears, the width of the rotary case can be made more compact than when it is installed outside between the bevel gears. It has the advantage of being able to measure

Hereinafter, an embodiment of the present invention will be described based on the drawings. At the upper end of the rotary case 3 in the vertical position, the tilling shaft 2 for driving the left and right tilling claw shafts 1, 1 is supported at the lower end. A power transmission shaft 5 interlocked with the tilling shaft 2 via a chain 4, and a front-rear posture perpendicular to the power transmission shaft 5, and on a vertical plane along the front-rear direction including the rotating surface of the power transmission chain 4. A center drive type cultivating device 7 supporting the input shaft 6 in the positioned state and interlocking the transmission shaft 5 and the input shaft 6 is connected to the rear of the traveling main machine 8, and In a tiller in which a power output shaft 9 on the machine 8 side and the input shaft 6 are interlocked via a shaft 10 with a universal joint, the transmission structure from the input shaft 6 to the transmission shaft 5 is as follows. It is composed of

That is, the bevel gear 11 is fixed to the input shaft 6, and a pair of gears are attached to the transmission shaft 5, which can selectively engage and disengage from the input bevel gear 11 by reciprocating and counter-moving in the axial direction. Bevel gears 12 and 12' are provided so as to face each other with the input bevel gear 11 in between and rotate integrally with each other.
Operation mechanism 1 for moving the pair 2, 12' oppositely
3, and by selecting a pair of bevel gears 12 and 12' to be meshed and interlocked with the input bevel gear 11, the rotation direction of the transmission shaft 5 can be switched between forward and reverse, and the portion of the transmission shaft 5 between the bevel gears 12 and 12' can be changed. The driving rotation direction of the tilling shaft 2 is switched through a chain 4 wound around a sprocket 5A which is externally fitted and fixed to the tiller shaft 2.

The operating mechanism 13 includes a fork 1 that slides on a fork shaft 14 positioned parallel to the transmission shaft 5 to move the bevel gears 12, 12'.
The arm 1 holds the forks 15, 15' and slides the forks 15, 15' by swinging.
6, 16', and a rod 17 that interlocks these arms 16, 16' in a counter-swinging manner, and an operating lever 1 that swings one arm 16.
It is configured by providing 8.

[Brief explanation of drawings]

The drawings show an embodiment of the transmission structure of the center drive type tillage rotary device according to the present invention, FIG. 1 is a side view of the main part, FIG. 2 is an expanded cross-sectional view of the main part,
FIG. 3 is an enlarged cross-sectional front view of the main parts. 2... Tilling shaft, 3... Rotary case, 4... Chain, 5... Transmission shaft, 5A... Sprocket, 6... Input shaft, 11... Input bevel gear, 12, 12'... Bevel gear, 13... Operation mechanism.

Claims (1)

[Scope of utility model registration request] A transmission shaft 5 interlocked with the tillage shaft 2 via a chain 4 and an input shaft 6 in a position orthogonal to the transmission shaft 5 are disposed at the upper end of the rotary case 3 on which the tilling shaft 2 is supported at its lower end. In the power transmission structure of a center drive type tillage rotary device, a bevel gear 11 is fixed to the input shaft 6, and the input bevel gear 11 is fixed to the power transmission shaft 5 by reciprocating movement in the axial direction of the power transmission shaft 5. A pair of bevel gears 12 and 12', which can be selectively interlocked and disengaged from each other, are provided facing each other with the input bevel gear 11 in between and rotating integrally with the input bevel gear 11.
Operation mechanism 1 for moving the pair 2, 12' oppositely
3, and the bevel gears 12, 12'
A transmission structure for a center drive type tillage rotary device, characterized in that a sprocket 5A for the chain 4 is provided on a transmission shaft 5 portion between the two.