JPH0474969B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a power tiller in which a ground work device is connected to a walking type machine body so as to be able to roll freely, and more specifically, it relates to an improvement in the transmission system that transmits power from the machine body to the ground work device. Regarding.

[Conventional technology]

Conventionally, as mentioned above, as a tiller equipped with a ground work 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 disposed coaxially with the rolling axis, it is necessary to adjust the output system on the fuselage side and the input system on the ground work equipment side to correspond to the rolling structure. This means that a special structure must be manufactured.

In other words, it requires a transmission structure that is completely different from the conventional non-rolling type tiller, which not only leads to increased costs, but also makes it difficult to perform ground work between the non-rolling type tiller and the rolling type tiller. There is room for improvement as this will reduce the ease of replacing the device or the aircraft.

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.

The purpose of the present invention is to provide a rational improvement that allows rolling operation and the machine body without reducing the compatibility of the ground working equipment or machine body between rolling and non-rolling power tillers. The objective is to obtain a transmission structure that transmits the power from the ground to the ground work equipment.

[Means for solving problems]

A feature of the present invention is that, in the tiller having the above-mentioned structure, the machine body is provided with an output shaft in a horizontal position, the ground working device is provided with an input shaft in a horizontal position, and at least one of the output shaft or the input shaft is configured to have a telescopic structure. In addition, a bevel gear is provided on each of the output shaft and the input shaft, and an intermediate shaft having a telescopic structure is provided with a bevel gear that engages with these bevel gears.
Its action and effects are as follows.

[Effect]

If the above characteristics are configured as shown in FIGS. 1 and 2, for example, the attitude of the intermediate shaft 19 will be allowed to change around the respective axes of the output shaft 15 and the input shaft 16 during rolling operation of the ground work device B. at the same time,
By expanding and contracting the intermediate shaft 19 and the input shaft 16,
Displacement in the relative distance between the output shaft 15 and the input shaft 16 is allowed.

〔Effect of the invention〕

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 that does not reduce the compatibility of ground working devices or machines between power tillers and allows rolling operation has been obtained.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

As shown in Figure 2, 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. B is connected to form a tiller.

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 of a telescopic structure is provided between the side of the rotary tiller B and the handle rod 6, Furthermore, the rotary tillage device B is provided with a weight type inclination sensor 9.

That is, the signal from the inclination sensor 9 feedback-controls the drive mechanism 8 in a direction that always directs it to a horizontal position, so that the cultivated ground can be leveled.

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 raising claws 12..., a cover 13 that covers above the plowing claws 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, as shown in FIG. 1, 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 a telescopic input shaft 16 in a horizontal position. Bevel gears 17a and 18a are attached to each end of the input shaft 16.

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. The posture of the intermediate shaft 19 is allowed to change around the axis of the input shaft 16, and at the same time, the relative distance between the output shaft 15 and the input shaft 16 is changed due to the expansion and contraction of the intermediate shaft 19 and the expansion and contraction of the input shaft 16. will be allowed.

In addition, as shown in the figure, the telescopic structure of the input shaft 16 is connected to the sprocket 2 at the upper part of the chain case 10.
0, the input shaft 16 is slidably fitted inside via a spline structure.

[Another example]

In addition to the embodiments described above, the present invention may 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 a partially cutaway plan view showing a transmission structure for a rotary tiller, and FIG. 2 is an overall side view of the 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)

[Claims] 1 A tiller in which a walking type machine body A and a ground work device B are connected in a rolling manner, in which the machine body A is provided with an output shaft 15 in a horizontal position, the ground work machine B is provided with an input shaft 16 in a horizontal position, and these Output shaft 15
Alternatively, at least one of the input shafts 16 is configured to have a telescopic structure, and the output shaft 15 and the input shaft 16 are provided with bevel gears 17a and 18a, respectively, and bevel gears 17b and 18b that engage with these bevel gears 17a and 18a are used. A tiller equipped with an intermediate shaft 19.