JPS6332503Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a transmission structure for a small-sized mobile agricultural machine suitable for performing management work such as weeding and tilling soil during intercultivation while mainly traveling between furrows.

Conventionally, when transmitting the power from the engine to the wheels and the rotary pawl,
As shown in Publication No. 174128, the transmission shaft to the wheels provided after the bevel gear type forward/reverse switching mechanism and the transmission shaft to the rotary pawl are configured in a double shaft structure, and both shafts have a speed changer. Since gears were provided, when the forward/reverse switching mechanism was switched to the forward rotation side and an arbitrary speed change gear was operated, both the wheels and the rotary pawls were shifted in synchronism. In this way, when the rotary pawl is driven at variable speeds as the wheels change speed, there is a drawback that work cannot be performed by slowing down the running speed of the wheels and increasing the rotational speed of the rotary pawl. Since the structure is merely equipped with a mechanism and a transmission mechanism, there is also the inconvenience that it is not possible to stop the rotary pawl and drive only the wheels.

The present invention solves the above drawbacks by devising a transmission structure for the wheels and rotary pawls, and also provides a structure that is easy to manufacture and process. The purpose is to reduce the width of the transmission case by devising the arrangement of the mechanism.

The characteristic configuration of the present invention, which was taken to achieve the above object, is that two rotating shafts are supported in the transmission case in a mutually parallel front-back orientation, and one of the two rotating shafts is rotated. A traveling power transmission shaft is provided in a horizontal position orthogonal to the shaft, and the traveling power transmission shaft and the one rotating shaft are interlocked and connected via a pair of bevel gears, and a power source is connected to the rear end of this one rotating shaft. A power extraction shaft is arranged concentrically, the power extraction shaft and the other rotating shaft are interlocked and connected via a gear, and a gear type transmission mechanism is provided between the two rotating shafts, and further, A shifter for the main clutch, a shifter for shifting the gear type transmission mechanism, and a shifter for a power transmission clutch for the power take-off shaft are each slidably fitted and held on the other rotating shaft; and an input gear of the power take-off shaft that is arranged coaxially with the one rotating shaft and is driven from the other rotating shaft via the interlocking gear. Increase the interval and within that interval,
The present invention is characterized by the arrangement of the bevel gear that interlocks and connects the one rotating shaft and the traveling power transmission shaft, and this configuration provides the following effects.

In other words, one rotating shaft as the transmission shaft to the wheel and the other rotating shaft as the transmission shaft to the rotary pawl are configured as separate shafts, and a gear type transmission mechanism is installed between them, so that the transmission to the rotary pawl is While the other rotating shaft rotates at a constant speed, one rotating shaft serving as a transmission shaft to the wheels can be changed in speed via a gear type transmission mechanism, thereby allowing the rotary pawl to be rotated at a constant speed. Since the running speed of the wheels can be changed while the wheels are rotating quickly, the rotary claws can be rotated at a relatively high speed even if the running speed of the wheels is slowed down, and good weeding work can be performed. In addition, we installed a shifter for the rotary pawl clutch on the lower transmission side of the gear type transmission mechanism, in other words, a clutch for the rotary pawl, so the rotary pawl can be stopped while the wheels are being driven. Conversion can be performed safely with the rotary claw stopped rotating.

The shifter for the main clutch used when switching the gear type transmission mechanism, the shifter for the gear change operation of the gear type transmission mechanism, and the shifter for the transmission clutch for the rotary pawl are used as the transmission shaft for the rotary pawl to rotate the other side. Because they are arranged together on the shaft side, for example, compared to the case where one rotating shaft is used as the transmission shaft for the wheel, and the other rotational shaft is used as the transmission shaft for the rotary pawl, they are arranged together. Therefore, when performing spline processing on the shaft for the shifter, there is no need to perform spline processing on both shafts, and the manufacturing process of the transmission structure can be facilitated.

Furthermore, a gear of a gear type transmission mechanism mounted on one rotating shaft, and the power output that is arranged coaxially with the one rotating shaft and is driven from the other rotating shaft via the interlocking gear. Since the distance between the shaft and the input gear is lengthened, and the bevel gear that interlocks and connects the one rotating shaft and the traveling transmission shaft is arranged within that distance, for example, the bevel gear that is attached to the one rotating shaft When the distance between the gear of the gear type transmission mechanism and the input gear of the power take-off shaft that is arranged concentrically with the one rotating shaft and is driven from the other rotating shaft via an interlocking gear is narrowed. As a result, the width of the transmission case does not become large.

That is, a gear of a gear type transmission mechanism attached to the one rotating shaft, and a power take-off shaft that is arranged coaxially with the one rotating shaft and is driven from the other rotating shaft via an interlocking gear. By narrowing the distance between the input gear and the power output shaft, the traveling transmission shaft is placed beyond the input gear of the power output shaft and on the power output shaft side, and the bevel gear attached to one rotating shaft is made larger in diameter. Since the bevel gear of the driving transmission shaft must be provided to avoid the input gear of the shaft, the width of the transmission case becomes larger. The distance between the input gear and the power take-off shaft that is arranged concentrically with one of the rotational shafts and is driven from the other rotational shaft via an interlocking gear is increased, and within that distance, said one of said By arranging a bevel gear that interlocks and connects the rotating shaft and the driving power transmission shaft, the bevel gear attached to one of the rotating shafts can be made smaller and the bevel gear of the traveling power transmission shaft can be placed closer to one of the rotating shafts. This led to the reduction of the width of the transmission case.

Embodiments of the present invention will be described below with reference to the drawings.

In the single-wheel walking type work machine shown in FIG. 1, a drive wheel W is supported on one side of the lower part of a transmission case 14, a transmission case 1 and an engine E are mounted on the upper part of the transmission case 14, and the drive wheel W is supported on one side of the lower part of the transmission case 14. A working device 15 consisting of a rotary claw or the like is connected to the rear of W.

The transmission structure from the engine E to the wheels W and the work implement 15 via the transmission case 1 will be described in detail with reference to FIGS. 2 and 3. The two motors are supported so as to be located in the same plane in a parallel front-back posture and rotate in response to the rotation of the input shaft 17 in the transmission case 1 which receives the engine E output with the camshaft 16 as the output shaft. Among the rotating shafts 2 and 3 of the book, one rotating shaft 2 and the traveling transmission shaft 4 supported by the transmission case 14 in a horizontal position with the axis perpendicular to the rotating shaft 2 are interlocked via a pair of bevel gears 5 and 6. A gear 8 is integrally connected to the rear end of one of the rotating shafts 2 and meshes with a drive gear 9 that is fitted and held together with a power transmission clutch shifter 13 that enters the rotating shaft 3 and is energized. A power take-off shaft 7 protruding toward the rear is arranged and supported concentrically. Further, the rear end of the rotary shaft 2 is supported by a bearing within the thickness of the power take-off shaft 7. This power take-off shaft 7 has a bevel gear pair 20
Since the power is transmitted to the working machine 15 via the wheels W and 21, 21, the rotational speed of the working machine 15 can be set independently of the wheel W rotational speed.

The gear type transmission mechanism 10 configured between the two rotating shafts 2 and 3 includes a gear 22 supported by the input shaft 17 via a needle bearing, and a gear 23 fixed to the rotating shaft 3 that is interlocked for deceleration. A shifter 11 for the main clutch which is biased and energized is arranged in parallel, and a shifter 12 for gear change operation is slidably fitted and held at the rear side of the gear 23 on the rotating shaft 3, and the shifter 12 for the shifter 12 is operated to switch the gear. Accordingly, when the speed is low, the intermediate first gear 24 is supported by the rotating shaft 2 through a needle bearing, and when the speed is high, the rotating shaft 3 is supported.
It is connected to an intermediate second gear 25 of the support via a needle bearing, and is finally interlocked with a final gear 26 fixed to the output shaft 2. In this way, each shifter 11, 12, 13 is slidably fitted and held on the side of the decelerated rotating shaft 3, so that
The impact when the clutch is turned on and off can be reduced.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

The drawings show an embodiment of the power transmission structure of a mobile agricultural machine according to the present invention, in which Fig. 1 is a perspective view showing a single-wheeled walking type working machine, Fig. 2 is an overall cross-sectional plan view, and Fig. 3 is an overall vertical cross-sectional side view. . 1... Transmission case, 2, 3...
Rotating shaft, 4...Transmission shaft for traveling, 5, 6...Bevel gear pair, 7...Power take-off shaft, 8, 9...Gear, 1
0... Gear type transmission mechanism, 11... Shifter for main clutch, 12... Shifter for speed change operation, 13...
Shifter for transmission clutch, 24... Gear of gear type transmission mechanism.

Claims (1)

[Claims for Utility Model Registration] 1. Two rotating shafts 2 and 3 are supported in a transmission case 1 in a mutually parallel front-back orientation, and one of the two rotating shafts 2 and 3 is rotated. A traveling power transmission shaft 4 is provided in a horizontal position orthogonal to the shaft 2, and the traveling power transmission shaft 4 and the one rotating shaft 2 are interlocked and connected via a pair of bevel gears 5 and 6, and the rotation of this one is A power take-off shaft 7 is arranged concentrically at the rear end of the shaft 2, and
This power extraction shaft 7 and the other rotating shaft 3 are interlocked and connected via gears 8 and 9, and a gear type transmission mechanism 10 is provided between the two rotating shafts 2 and 3. A shifter 11 for the main clutch, a shifter 12 for shift operation of the gear type transmission mechanism 10, and a shifter 13 for the power transmission clutch for the power take-off shaft 7 are each slidably fitted and held on the rotating shaft 3, and A gear type transmission mechanism 10 attached to a rotating shaft 2 of
and the input gear 8 of the power take-off shaft 7 which is arranged coaxially with the one rotating shaft 2 and is driven from the other rotating shaft 3 via the interlocking gear 9. A power transmission structure for a mobile agricultural machine, in which the bevel gears 5 and 6 are arranged to interlock and connect the one rotary shaft 2 and the traveling power transmission shaft 4 within a long interval. 2. The power transmission structure for a mobile agricultural machine according to claim 1, wherein the two rotating shafts 2 and 3 are supported so as to be located in the same plane.