JPH051220Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a tiller in which a ground-working device is connected to a walking-type machine so that it can roll freely around the longitudinal axis. Concerning improvements to the transmission system that transmits power.

[Prior Art] Conventionally, as mentioned above, as a tiller equipped with a ground working device that can freely roll, for example,
There is a power cultivator disclosed in Publication No. 15917, in which a transmission shaft that is coaxial with the rolling axis is installed in the member that connects the machine body and the ground work device so that it can roll freely. A transmission system is formed to transmit power to the ground work equipment.

[Problem to be solved by the invention] However, in a structure in which the transmission shaft is arranged coaxially with the rolling axis, it is necessary to adjust the output system on the aircraft side and the input system on the ground work equipment side to correspond to the rolling structure. A special structure would have to be manufactured.

In other words, it requires a transmission structure that is completely different from that of conventional non-rolling type tillers, which not only leads to increased costs, but also requires the use of ground work equipment between non-rolling type tillers and rolling type tillers. Otherwise, it may reduce the compatibility of the aircraft, so there is room for improvement.

Incidentally, in a non-rolling type tiller, generally both the machine body and the ground work device are provided with an output shaft and an input shaft in a horizontal position, and these shafts are interlocked and connected by an endless chain or the like. The transmission structure is constructed by the following.

Therefore, it is possible to interpose an intermediate shaft with a universal joint between the output shaft and the input shaft, but since the intermediate shaft is arranged at an angle approximately perpendicular to the output shaft and input shaft, , which tends to cause strain on the structure of the transmission system.

The purpose of the present invention is to, by rational improvement, allow rolling operation without reducing the compatibility of ground working devices or machines between tillers of rolling and non-rolling structures. and,
The aim is to obtain a transmission structure that can easily transmit power from the aircraft to the ground work equipment.

[Means for solving problems]

The features of the present invention are that, in a cultivator with a rotary structure, the machine body is provided with an output shaft in a horizontal position, and the ground working device is provided with an input shaft in a horizontal position with a rotational axis that substantially intersects the axis; At least one of the shaft or the input shaft is configured to have a telescopic structure, and a bevel gear is provided on each of the output shaft and the input shaft,
The present invention is provided with a telescopic intermediate shaft having bevel gears that mesh with these bevel gears, and its functions and effects are as follows.

[Effect]

When the above characteristics are configured as shown in FIGS. 1 and 2, for example, when the ground work device B performs rolling operation, the attitude of the intermediate shaft 19 is allowed to change around the axes of the output shaft 15 and the input shaft 16, respectively. At the same time, the expansion and contraction of the intermediate shaft 19 and the expansion and contraction of the input shaft 16 allow displacement of the relative distance to the output shaft 16,
Moreover, since the rolling axis P and the rotation axis of the input shaft 16 substantially intersect, the amount of expansion and contraction of the input shaft 16 can be reduced.

[Effect of idea]

Therefore, by providing two sets of bevel gears and intermediate shafts, and configuring at least two locations with a telescoping structure, the postures of the output shaft and input shaft can be maintained as before, allowing for both rolling and non-rolling. A transmission structure has been obtained that does not reduce the compatibility of the ground working device or the machine body between tillers, allows rolling operation, and easily transmits power from the machine body to the ground working device.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

As shown in Figure 1, there are a pair of left and right wheels 1 at the bottom.
An engine 4 is mounted on a frame 3 extending forward from a transmission case 2 equipped with a belt transmission mechanism 5 for transmitting power from the engine 4 to the transmission case 2. A pair of left and right handle rods 6 are extended rearward from the rear side to form a walking type machine body A, and a rotary tiller as an example of a ground work device is connected to the rear surface of the transmission case 2 via a support member 7 for connection. A tiller is constructed by connecting the devices B.

The support member 7 is configured to be able to swing freely around the longitudinal axis P, and a drive mechanism 8 for rolling operation having a telescoping structure is provided between the side of the rotary tiller B and the handle rod 6. Further, the rotary tilling device B is provided with a weight type inclination sensor 9.

That is, the signal from the inclination sensor 9 feed-pack-controls the drive mechanism 8 in a direction that always directs it to a horizontal position, thereby leveling the cultivated ground.

Further, the rotary tillage device B includes a chain case 10 disposed in the center in the left-right direction, a drive shaft 11 provided from the bottom of the chain case 10 in the left-right direction, and a large number of tillers provided on these drive shafts 11. It consists of a cover 13 that covers the upper part of the raising claw 12..., the tilling claw 12..., an idler wheel 14 for setting the plowing depth, and the power from the machine A is transmitted to the upper part of the chain case 10. It works by doing this.

That is, the transmission case 2 is provided with an output shaft 15 in a horizontal position, and the upper part of the chain case 10 is provided with an input shaft 16 in a horizontal position with a telescopic structure and having a rotation axis substantially intersecting the axis P. Bevel gears 17a and 18a are attached to the ends of the output shaft 15 and input shaft 16, respectively.

In addition, a transmission structure is constructed by providing an intermediate shaft 19 with a telescopic structure consisting of a double shaft having bevel gears 17b and 18b that mesh with these bevel gears 17a and 18a. At the same time, the intermediate shaft 19 is allowed to change its posture around the axis of the input shaft 16, and at the same time, the output shaft 15 and the input shaft 16 are
Displacement of the relative distance between the two is allowed.

Note that, as shown in FIG.
0, the input shaft 16 is slidably fitted inside via a spline structure.

[Another embodiment]

In addition to the above-mentioned embodiments, the present invention can also be configured such that the output shaft has a telescopic structure, or both the output shaft and the input shaft have a telescopic structure.

[Brief explanation of the drawing]

The drawings show an embodiment of the tiller according to the present invention, and FIG. 1 is an overall side view of the tiller, and FIG. 2 is a partially cutaway plan view showing a transmission structure for a rotary tiller. 15...Output shaft, 16...Input shaft, 17a, 1
7b...bevel gear, 18a, 18b...bevel gear, 19...intermediate shaft, A...body, B...ground work device.

Claims (1)

[Scope of utility model registration request] It is a tiller in which a ground working device B is connected to a walking type machine A so as to be able to roll freely around the longitudinal axis P, and the machine body A is provided with an output shaft 15 in a horizontal position, and the ground working device B is connected to the above-mentioned. An input shaft 16 in a horizontal position having a rotational axis that substantially intersects with the axis P is provided, at least one of the output shaft 15 or the input shaft 16 is configured to have a telescopic structure, and a bevel gear is provided on each of the output shaft 15 and the input shaft 16. 17a,1
8a, and these bevel gears 17a, 18a
A tiller equipped with an intermediate shaft 19 having a telescopic structure and having bevel gears 17b and 18b that mesh with the movable shaft 19.