JPH0621303Y2 - Self-propelled mower - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention provides stable and free use of the convex portions and the corners even when traveling on the upper surface of the uneven ridges or the corners of the ridges. The present invention relates to a self-propelled mower that can adjust the tilt of the machine body and has the stability of a two-wheeled vehicle that is a unicycle and that has an effective upper drive power transmission system.

[Conventional technology]

Conventionally, not only self-propelled mowers but also all self-propelled work machines are generally two-wheel type in which tire wheels are normally arranged on the left and right or three-wheel type with auxiliary wheels in consideration of stability.

[Problems to be solved by the device]

However, in a self-propelled mower, not only the upper surface of the ridge but also the ridge corners and slopes of the ridge must be mowed when the ridge is mowed in a place with many irregularities.

In that case, since it is necessary to tilt the machine body at any time to adjust the angle of the mowing blade to mow the grass, there is a problem that the two-wheeled or three-wheeled machine cannot freely tilt the machine body.

On the other hand, if a simple ordinary tire unicycle is used, the machine body tends to be tilted to the left or right, but the stability of the machine body is lacked, and a heavy machine body must be supported by human power, resulting in a problem that work efficiency is extremely reduced.

The applicant has developed a self-propelled mower for many years, made a prototype, and repeated test research, and developed the self-propelled mower of the present invention which solves this problem.

We also researched the power transmission system and completed a mechanism that reliably and simultaneously transmits power to the wheels, to the mowing blade, and to the crank mechanism.

[Means for Solving the Problems]

Power is transmitted via the transmission shaft 3 of the support cylinder 2 of the mowing blade 1
In a self-propelled mower in which the grass cutting blade 1 is horizontally rotated by transmitting to the center, a small diameter portion 4 having a curved concave shape is formed in the center, and flat portions 5 are formed at both end portions to form a staggered shape as a whole. The present invention relates to a power self-propelled mower, characterized in that a wheel 6 is laid across the lower part of the machine body a and a driving force transmission device 7 for rotating the wheel 6 is provided.

Power is transmitted via the transmission shaft 3 of the support cylinder 2 of the mowing blade 1
In the self-propelled mower that transmits the driving force to the wheels 6 in the self-propelled mower that horizontally transmits the grass cutting blade 1 to the gear transmission 22, the gear transmission 22 transmits the driving force to the wheels 6 and the reduction gear 25 by the meshing of the worm 23 and the worm wheel 24.
Is provided, the driving force of the wheels 6 is distributed from the reduction shaft 26 of the worm wheel 24, the bevel gear 27 is provided back to back on the worm wheel 24, and the bevel gear 27 is installed in the front-rear horizontal direction of the machine body a. The bevel gears 27 provided on the take-up shaft 28 are meshed with each other, the power is taken from the power take-off shaft 28 to a crank disk 29 provided on the front of the machine body, and the rotation of the crank disk 29 causes the crank mechanism 30 to mow the grass. A self-propelled mower, characterized in that the support cylinder 2 of the blade 1 is provided so as to swing left and right.

[Action]

A description will be given based on an example in which the grass at the corner 9 of the ridge 8 is mowed.

As shown in FIG. 3, the curved small diameter portion 4 in the center of the wheel 6 is positioned at the corner 9 of the ridge 8 and the machine is tilted in the inclination direction of the ridge 8 with the corner 9 of the ridge 8 as a fulcrum.

The position of the small diameter portion 4 in contact with the corner portion 9 is slid to the left and right little by little and finely adjusted, and the grass cutting blade 1 is applied at a right angle to the grass of the corner portion 9 to perform the mowing work.

In this case, one of the flat portions 5 formed at both ends of the wheel 6 contacts the upper surface of the ridge 8 and the other falls on the inclined side surface of the ridge 8, but the curved concave small diameter portion 4 contacts the corner of the ridge 8. Therefore, 2
The point support is maintained and stable driving is possible.

Moreover, when the boundary 10 between the flat portion 5 and the curved concave small diameter portion 4 is pressed into the soil on the upper surface of the ridge 8, the machine body a is prevented from sliding more than necessary in the inclination direction of the ridge 8.

The power transmission system will be described in detail in the embodiment.

〔Example〕

The wheel 6 in the drawing shows a case in which a non-slip flat ridge 11 is provided in the circumferential direction of the wheel around the small diameter portion 4.

Further, the inclination angle of the handle 12 with respect to the machine body a is provided so as to be variable (the height of the grip portion can be changed).

Further, the mounting position of the handle 12 with respect to the machine body a can be moved left and right, and the handle 12 is provided so as to be inclined in the direction opposite to the inclination of the wheels 6.

For example, in FIG. 4, reference numeral 13 is a left and right moving groove, 14 is a fixing bolt with a tightening nut 14 ′ and a knob 14 ″, 15 is a moving body, 16 is a handle base shaft, and 17 is a movement for tilting the handle 12. An engaging groove with which engaging pins 18 provided on the left and right of the moving body 15 engage when the body 15 is slightly rotated in the direction opposite to the inclination of the wheels 6.
37 is a receiving bar for lateral movement of the handle, 19 is a joint, 20 is an adjusting bolt, and 21 is a long window.

Next, the power transmission system of this machine will be described.

The rotation of the driving shaft 32 of the engine 31 is transmitted to the worm 23 via the intermediate shaft 33, the worm wheel 24 decelerates to the reduction shaft 26, the wheels 6 are driven, and the clutch mechanism is operated by the operation unit 38 provided on the handle 12 ( (Not shown).

On the other hand, the bevel gear 27 ′ provided back to back on the worm wheel 24 is meshed with the bevel gear 27 ′ to support the power preparatory shaft 28 for 3 to 4 times speedup rotation, and the crankshaft 29 is speeded up via the parallel shaft 34. Since it is rotated, the mowing blade can be swung favorably.

The grass cutting blade 1 is sorted through the vertical position shaft 36 of the bevel gear box 35 and the transmission shaft 3.

[Effect of device]

Since the present invention is constructed as described above, it is a unicycle type and has a wide wheel width, so that it can run stably and at the same time, it is possible to use the small diameter part skillfully and tilt the machine body at the ridge corner etc. It becomes a self-propelled mower that is excellent in practical use and can be maintained and run.

In addition, when power is transmitted to the axles by worm deceleration, several times the speed increase is pipe-hanged and the crank mechanism is operated, and at the same time, the rotation of the mowing blade is also excellent. Become a hay mower.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a perspective view of the product, FIG. 2 is a front view of a wheel portion when the machine is traveling on a ridge, and FIG. Fig. 4 is a front view of a state in which the handle is tilted to run on the ridge, Fig. 4 is a rear view of a tilting device that tilts the handle to the left and right, Fig. 5 is a plan view of the main part of the drawing, and Fig. 6 is a power transmission system FIG. 3 is a side view of the fuselage with a part cut away. a: Airframe, 1 ... Mowing blade, 2 ... Support cylinder, 3 ... Transmission shaft, 4 ... Small diameter portion, 5 ... Flat portion, 6 ... Wheel, 7 ...
Drive force transmission device, 22 ... Gear transmission, 23 ... Worm, 24 ... Worm wheel, 25 ... Reduction gear, 26 ... Reduction shaft, 27 ... Bevel gear, 28 ... Power distribution shaft, 29 ... … Crankboard, 30… Crank mechanism.

Claims (2)

[Scope of utility model registration request] 1. A self-propelled mower in which power is transmitted to a mowing blade via a transmission shaft of a support cylinder of the mowing blade to horizontally rotate the mowing blade, and a small diameter portion having a curved concave shape is formed at the center, and both ends are formed. A self-propelled mower, characterized in that a wheel having a flat portion formed on the whole portion and formed into a staircase shape is laid across the lower part of the machine body, and a driving force transmission device for rotating the wheel is provided. 2. A self-propelled mower in which power is transmitted to a mowing blade via a transmission shaft of a support cylinder of the mowing blade to horizontally rotate the mowing blade, a worm and a worm wheel are used in a gear transmission for transmitting a driving force to wheels. Providing a gear reducer by meshing,
The driving force of the wheels is distributed from the reduction shaft of this worm wheel, and the bevel gears are installed back to back on the worm wheel, and the bevel gears installed on the power distribution shaft installed in the front-rear horizontal direction of the machine are meshed with this bevel gear. The power distribution shaft is used to distribute power to the crankboard provided on the front of the machine, and the rotation of this crankboard causes the support cylinder of the mowing blade to swing left and right via the crank mechanism. A unique self-propelled mower.