JPS6327551Y2 - - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a self-propelled mower.

When working continuously for a long time using a conventional shoulder-type grass cutter, the labor burden is too great, and the advantage of being able to change the angle of the cutting blade surface at will cannot be fully utilized. It was hot. On the other hand, with two-wheel or multi-wheel mowers such as lawn mowers, the selection of the angle of the cutting blade surface is restricted depending on the ground contact condition of the wheels, so they are not used for relatively flat tasks such as garden maintenance. However, it is not suitable for complex sloped surfaces, such as mowing grass along the ridges of fields or mowing undergrowth in forests.

The present invention has been developed to create a grass mower that can be easily used by women and men for long periods of time by adding a self-propelled function without sacrificing the ability to select the angle of the cutting blade surface of a shoulder-type mower. Its purpose is to provide.

Hereinafter, the present invention will be described in detail with reference to embodiments of the accompanying drawings.

1 is a disk-shaped mowing blade.

2 is an irreversible rotation type prime mover.

3 is a main shaft, the rear end of the main shaft 3 is interlocked and connected to the prime mover 2 via a centrifugal clutch, and the front end is connected to the cutting blade rotating shaft 4 on which the disk-shaped mowing blade 1 is mounted, and power is transmitted by meshing with bevel gears. Interlocking connection is made via device 5. Further, a bevel gear 6 is pivotally attached to an intermediate portion of the main shaft 3.

7 is a narrow running wheel, and the running wheel 7 has an axle 8.
A worm wheel 9 is attached to the axle 8 so as to rotate together with the axle 8.

Reference numeral 10 denotes a running transmission shaft, and the upper part of the running transmission shaft 10 meshes with the bevel gear 6 and has a bevel gear transmission device 3a.
A bevel gear 11 constituting the worm wheel 9 is attached to the shaft, and a worm 12 that meshes with the worm wheel 9 is attached to the lower part of the worm wheel 9.
Attach the shaft.

Reference numeral 13 denotes a main frame, and the frame 13 includes a sleeve 14 in which the main shaft 3 is rotatably housed, and a bevel gear box 15 in which the bevel gear 6 and bevel gear 11 are housed.

Reference numeral 16 denotes a traveling transmission frame, and the traveling transmission frame 16 includes a gear housing 1 that houses a worm reduction mechanism consisting of the worm 12 and the worm wheel 9.
7 and a stepstand pipe 18 in which a traveling power transmission shaft 10 is rotatably housed.

The axle 8 engages the worm 12 and the worm wheel 9 so as to protrude laterally from the gear housing 17.

The bevel gear 11 is then inserted into the bevel box 15 so as to mesh with the bevel gear 6, and thereafter the lower part of the bevel gear box 15 of the main frame 13 and the upper part of the ladder pipe 18 of the traveling transmission frame 16 are detachably fixed.

When the main frame 13 and the traveling transmission frame 16 are connected, the axle shaft 8 is installed to protrude from the side of the gear housing 17 in a direction perpendicular to the traveling transmission shaft 10 whose fixed position is supported in the stepladder pipe 18. The gear can be pivotably mounted so that the direction can be changed, so that the meshing phase between the bevel gear 11 and the bevel gear 6 can be changed.

As a result, the travel transmission frame 16 can be displaced 180 degrees from the above-mentioned fixed state with respect to the main frame 13 (as shown by the two-dot chain line in FIG. 3), or the traveling direction of the aircraft can be reversed, or It is made so that it can be moved to move the grass to the side and mowing the grass to the side.

Fig. 4 shows another embodiment, in which the main shaft 3 of the above-mentioned example is divided into two parts at the front part of the bevel gear 6, and the two divided shafts 3, 3 are spline-engaged so that they can be attached and detached back and forth. This structure enables compact storage when not in use, or allows the working device of the front transmission shaft 3 portion to be used in combination with other working devices.

Note that 19 is a control handle.

According to the device of the present invention configured as above,
Since the rotational power of the transmission shaft 3 is transmitted to the narrow traveling wheels 7 via the bevel gear transmission and the worm reduction gear to provide the self-propelling function, the operator can hold the machine by holding the machine. The labor burden can be significantly reduced even when working continuously for a long time, and since the mowing blade is a disc-shaped mowing blade 1 and the running wheel 7 is narrow and single-wheel type, the machine can be operated vertically and horizontally. Since it can be tilted forward and forward freely, the angle of the cutting blade surface can be selected appropriately, without compromising the workability of a shoulder-type mower. However, the practical effects are enormous, such as being able to perform mowing work by positioning the mowing blade on the left or right side as required.

[Brief explanation of drawings]

The drawings show an embodiment of the device according to the present invention; FIG. 1 is a perspective view, FIG. 2 is a side sectional view, FIG. 3 is an exploded perspective view of the main parts, and FIG. 4 is a diagram showing another embodiment. It is a side sectional view showing an example. Explanation of the main symbols in the drawing, 1...Mowing blade, 2...
... Prime mover, 3... Main shaft, 3a... Bevel gear transmission device, 5... Power transmission device, 7... Running wheel, 8...
...Axle, 10...Traveling transmission shaft, 13...Main frame, 17...Gear case, 18...Stepladder pipe.

Claims (1)

[Scope of utility model registration request] In the main frame 13, a main shaft 3 which can be connected to the prime mover 2 is rotatably supported. A bevel gear transmission 3a is provided in the middle of the gear housing 17, and an axle 8 that supports a single narrow running wheel 7 projects from the side of the gear housing 17.
And the bevel gear transmission 3a of the main frame 13
and the upper part of a step stand pipe 18 on which the traveling power transmission shaft 10 is mounted are rotatably attached and removably fixed so that the direction of the axle shaft 8 can be changed in the direction orthogonal to the traveling power transmission shaft 10. A self-propelled mower characterized in that the shaft 8 and the bevel gear transmission 3a are configured to interlock with each other.