JPH07298747A - Lawn mower - Google Patents

Abstract

PURPOSE:To provide a lawn mower capable of sufficiently corresponding even if the width of slant face of levee is changed and readily carrying out lawn mowing operation and excellent in labor saving and operability by providing a mechanism for transmitting power of an engine to a cutter, a side-holding material-oscillating mechanism, etc., for retaining a side-holding material so as to be vertically swingable. CONSTITUTION:This lawn mower 1 is composed of a car body frame 5 equipped with at least longitudinal wheels 2 and 3 and an engine 4, a side-holding material 6 projectingly installed at right or left of the car body from this car body frame 5, a cutter 8 attached to the top of the side-holding material 6, a transmission mechanism 10 for transmitting power of the engine 4 to the cutter 8, a side-holding material-oscillating mechanism 30 for retaining the side-holding material 6 so as to be vertically swangable, a side-holding material-keeping mechanism 40 for keeping the side-holding material 6 movably to the direction of car body width and a side-holding material moving mechanism 50 for forcibly moving the retained side holding material 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mowing machine suitable for mowing a slope of a ridge.

[0002]

2. Description of the Related Art Mowing work of rice field ridges is a heavy labor, and for the purpose of reducing this labor, for example, in fact, Shokai Sho 58-14642.
No. 6 "Ridge mowing device" and Jitsukai Sho 61-95229 "Two-sided mower" have been proposed. The ridge mowing device described above is "equipped with a horizontal rotary blade for cutting the upper surface of the ridge and an inclined rotary blade for cutting the side surface of the ridge, which is fixed at an inclined angle." The above-mentioned two-sided mower includes a "horizontal hair clipper blade and an inclined rotary blade", and
According to the figure, the rotary blade is held so as to be vertically swingable around the reference numeral 8, and the cutting height can be adjusted to some extent by adjusting the reference numeral 10 (turnbuckle). Both of the above are devices for simultaneously cutting the upper surface (horizontal surface) of the ridge with a horizontal blade and the inclined surface with an inclined blade, and the inclined blade can be adjusted because the inclination angle of the inclined surface changes for each ridge.

[0003]

However, the width of the slopes of the ridges is not constant, which causes the uncut portion of the slopes in the above case, and the turnbuckle must be adjusted in each case. That is, if the slope is wide, the two-sided mower must be run over the ridge more than once in the above.
Adjustment of the turnbuckle is troublesome and work efficiency is not good. Therefore, an object of the present invention is to provide a mower capable of cutting a wide slope in one pass.

[0004]

In order to solve the above problems, the present invention provides a vehicle body frame having at least two front and rear wheels and an engine, and a lateral holding member protruding from the vehicle body frame to the right or left of the vehicle body. A cutter attached to the end of the horizontal holding member, a transmission mechanism for transmitting the power of the engine to the cutter, a horizontal holding member swinging mechanism for holding the horizontal holding member in a vertically swingable manner, A lateral mower holding mechanism for holding a holding material movably in the vehicle width direction and a lateral holding material moving mechanism for forcibly moving the held lateral holding material constitute a mower.

For example, the transmission mechanism includes a drive pulley mounted on an output shaft of an engine, a driven pulley driven by a belt by the drive pulley, and an input shaft rotated by the driven pulley. An output shaft is rotated by a shaft via a pair of bevel gears, and the output shaft is a sleeve shaft having a spline on the inner surface, and a gear box movably fitted to the output shaft and the other end is a cutter. And a spline shaft connected to.

Further, the horizontal holding material moving mechanism includes a rack formed on the horizontal holding material, a pinion meshing with the rack, a motor for rotating the pinion, a power feeding portion for feeding power to the motor, The motor control unit controls the motor to adjust the position of the cutter.

Further, it is preferable that the body frame has the same shape in the front and rear, and a grip and an operating lever handled by a driver are provided in the front and rear respectively.

Further, the vehicle body frame is provided with a lower frame for mounting front and rear wheels, and an upper frame for mounting a grip and an operating lever handled by a driver, and a vehicle having left and right grips with respect to the center of the lower frame in the vehicle width direction. The widthwise center is offset in a direction away from the cutter.

[0009]

[Function] While the grass mower is driven by the front and rear wheels, the lateral holding material is forcibly moved in the vehicle width direction to hold the cutter at a desired position and mow the grass. Since the lateral holding material and the cutter are freely tilted by the lateral holding material swinging mechanism, the slope of the ridge can be easily cut.

The engine output is transmitted through a driving pulley, a belt, a driven pulley, a gear box and a spline shaft, and causes the cutter to rotate at high speed. Since the spline shaft moves with respect to the gear box, it does not hinder the movement of the lateral holding member and the cutter.

The lateral holding member is forcibly driven by a motor via a rack and a pinion. The motor is controlled by the motor controller.

The driver grips the rear grip on the outward trip,
On the return path, you can operate the mower in a forward position without turning the mower by gripping the front grip.

The left and right grips are offset in the direction away from the cutter to keep the driver away from the cutter.

[0014]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of the reference numerals. FIG. 1 is a perspective view of a mower according to the present invention. The mower 1 includes a body frame 5 having front wheels 2, rear wheels 3 and an engine 4,
A lateral holding member 6 protruding from the vehicle body frame 5 to the right or left of the vehicle body, a cutter housing 7 and a cutter 8 attached to the tip of the lateral holding member, and a transmission mechanism for connecting the cutter 8 and the engine 4 to each other. 10, a horizontal holding material swinging mechanism 30 that holds the horizontal holding material 6 on the vehicle body frame 5 in a swingable manner, and a horizontal holding material holding mechanism 40 that holds the horizontal holding material 6 movably in the vehicle width direction, The lateral holding material moving mechanism 50 forcibly moving the lateral holding material 6 is provided. The details of each mechanism described above will be described in detail with reference to FIG.

FIG. 2 is a plan view of the mower according to the present invention. The body frame 5 includes lower frames 5a, 5a arranged in two rows on the left and right sides.
Vertical frames 5b ... Standing up from these lower frames 5a, 5a (... indicates a plurality, the same applies hereinafter), and upper frames 5c, 5 hung over these vertical frames 5b.
and grips 5f, 5f, 5r, 5r and various operating levers 9 on the front and rear of the upper frames 5c, 5c, respectively.
a, 9b, 9a, 9b are attached and can be operated from both front and rear, and the center axis between the upper frames 5c and 5c, that is, the center L1 between the left and right grips is the cutter axis with respect to the center axis L2 between the lower frames 5a and 5a. Δ on the opposite side of housing 7
It is characterized by being offset only. Therefore, when cutting the slope with the cutter 8, the driver can approach the center of the upper surface of the ridge by δ, which is preferable because the slope is less likely to reach the foot. Further, the base 4a is mounted on the lower frames 5a, 5a.
The engine 4 mounted via the is also mounted at a position greatly eccentric to the right side of the drawing. Therefore, the cutter housing 7
The engine 4 is configured to balance the overhang load due to such factors as the load on the driver.

FIG. 3 is a sectional view taken along line 3-3 of FIG. 2, in which the transmission mechanism 10 has a drive pulley 11, a belt 12, a driven pulley 13, and a driven pulley 13 which are directly connected to the output shaft 4b of the engine 4. A gearbox 20 for transmitting to the spline shaft 15, a spline shaft 15 slidably connected to the gearbox 20, and a pair of bevel gear sets 16, and transmits the power of the engine 4 to the cutter 8 in the cutter housing 7. It is a thing. If the tensioner 17 is loosened, the belt 12 becomes loose and the rotation of the cutter 8 is interrupted. The tensioner 17 is on / off controlled by the operating lever 9a (see FIG. 2).

FIG. 4 is a plan sectional view for explaining the gear box and the lateral holding member swinging mechanism according to the present invention. The gear box 20 has a pair of bevel gears 22 and 23 in a box body 21 of an oil bath structure. Specifically, the input shaft 24 holds one bevel gear 22, the bearings 25 and 25 rotatably hold the input shaft 23 in the gearbox main body 21, and the output shaft 26 holds the other bevel gear 23. ,
The output shaft 26 includes bearings 27, 27 and an oil seal 28 that rotatably hold the output shaft 26 on the gearbox main body 21. In particular, the output shaft 26 is a so-called sleeve shaft.
A spline is cut on the inner surface, and the spline shaft 15 is fitted and held on this spline.

Next, the lateral holding material swing mechanism 30 will be described.
The horizontal holding member swinging mechanism 30 includes a dummy shaft 31 projecting from the box body 21 at a position forming a pair with the input shaft 24.
The dummy shaft 31 is supported by a bearing 32 called a pillow block, and its base is fixed to the lower frame 5a. The arm bracket 33 is supported by the bearing 35, and the input shaft 24 is supported by a bearing 35, and the base is fixed to the lower frame 5a. And the arm bracket 36, the gear box 20 freely swings together with the spline shaft 15 by bearings 32 and 35. In the figure, 37 is an arm fixed to the dummy shaft 31, and 38 is a roller chain.

FIG. 5 is an explanatory view of the lateral holding material holding mechanism according to the present invention (enlarged view of the main part of FIG. 3). The lateral holding material holding mechanism 40 for movably holding the lateral holding material 6 is the gear. It comprises a watermark box-shaped frame body 41 fixed to the upper surface of the box 20, and a plurality of guide rollers 42 attached to the frame body 41.

FIG. 6 is a sectional view taken along line 6-6 of FIG. 5, and the guide rollers 42 ... A roller group of a total of 16 rollers, each of which has an upper surface, a lower surface, and left and right surfaces of the square pipe-shaped horizontal holding member 6. The horizontal holding member 6 can be moved in the front-back direction of FIG. The horizontal holding material moving mechanism 50 includes a rack 51 formed on the upper surface of the horizontal holding material 6, a pinion 52 that meshes with the rack 51, and a small motor 53 that rotates the pinion 52.
And a power supply unit 54 for the motor 53 and the motor 53
The motor control unit 55 moves the horizontal holding member 6 to a position specified by the driver and holds the horizontal holding member 6 and moves the horizontal holding member 6 horizontally in a driving mode (reciprocating stroke) specified by the driver. The holding material 6 is continuously reciprocated. The power supply unit 54 is preferably a battery or a small generator driven by the engine 4.

The operation of the mower having the above structure will be described below. In FIG. 2, when the driver manually starts the engine 4, the drive pulley 11 and the traveling pulley 61 rotate.
The traveling pulley 61 is connected to a rear wheel 3 via a chain 62 and a sprocket 63 with a clutch and a speed reducer (not shown) below the base 4a. It can be run or stopped arbitrarily. On the other hand, the drive pulley 11 and the belt 12 shown in FIG.
Also, the spline shaft 15 is rotated via the gear box 20, and the spline shaft 15 rotates the cutter 8.

FIG. 7 is an explanatory view of the operation of the mower according to the present invention, showing a state in which the grass on the slope 66 is cut by the cutter 8 while traveling on the upper surface 65 of the ridge by the front and rear wheels 2 and 3. At this time, when the inclination angle of the slope 66 changes, the spline shaft 15 and the lateral holding member 6 swing around the input shaft 24. Since the axial distance between the input shaft 24 and the output shaft 4b of the engine does not change, the belt 12 is not burdened.
Then, the cutter 8 can be moved to a desired position by rotating the pinion 52 forward or backward according to the driver's intention. Further, if the automatic reciprocating mode is set, the cutter 8 can be continuously reciprocated by the selected stroke S.
If you move the vehicle at a low speed, a wide range of slopes
You can reap with a pass. The auxiliary wheels 7a of the cutter housing 7 are shown as ordinary wheels in the figure, but it is more preferable to use the auxiliary wheels 7a as free wheels.

FIG. 8 is a diagram for explaining another operation of the mowing machine according to the present invention. As shown in FIG. 7, the lateral holding member 6 is the input shaft 24.
Since it can easily move up and down around the center, it may be inconvenient when turning or over an obstacle. Therefore, in FIG. 8, the retract lever 67 is operated to forcibly rotate the gear box 20 in the clockwise direction in the drawing via the roller chain 38, the arm 37, and the dummy shaft 31, so that the cutter housing 7 can be floated from the ground. To do. Retractable rubber 67, 67 is a connecting rod 68
Since they are connected by, you only have to operate one of them.

Returning to FIG. 2, when the vehicle reciprocates on the upper surface of the ridge, the driver grips the rear wheel 3 side grips 5r and 5r on the outward path and the front wheel 2 side grips 5f and 5f on the return path. You can always operate forward. Therefore, the operation lever 9
a, 9b, 9a, 9b are provided, and a pair of retreat levers 67, 67 are arranged at approximately the center of the upper frames 5c, 5c.

Although not shown, the spline shaft 15 of FIG.
In addition, it is advisable to enclose the lateral holding member 6 with a dustproof cover, preferably a bellows type cover. Further, since it is the front and rear two-wheeled vehicle of this embodiment, it is suitable for narrow ridges, but when the width is not limited, the mower 1 may be a three- or four-wheeled vehicle.

[0026]

The present invention has the following effects due to the above configuration. The mower of claim 1 is driven by front and rear wheels,
By forcibly moving the lateral holding material in the vehicle width direction, the cutter can be held at the desired position and the grass can be cut, so even if the width of the slope of the ridge changes, it can be sufficiently coped with and the grass cutting work can be performed. Will be easier.

In the mower according to claim 2, the engine output is transmitted through the drive pulley, the belt, the driven pulley, the gear box and the spline shaft to rotate the cutter at a high speed, so that the cutter moves in the vehicle width direction. Nevertheless, the cutter can be driven reliably.

In the mower according to the third aspect of the present invention, the horizontally-held material is forcibly driven by the motor through the rack and the pinion, and the motor is controlled by the motor control unit. Can reduce the burden of.

In the mower according to claim 4, the driver grips the rear grip on the outward path and the front grip on the return path, so that the driver can operate the mower in a forward posture without turning over the mower. It is easy to use.

In the mower according to claim 5, since the left and right grips are offset in the direction away from the cutter, when cutting the slope of the ridge, the driver will approach the center of the upper surface of the ridge by the offset amount. It is preferable that the feet of the are not easily caught on the slope.

[Brief description of drawings]

FIG. 1 is a perspective view of a mower according to the present invention.

FIG. 2 is a plan view of the mower of the present invention.

3 is a sectional view taken along line 3-3 of FIG.

FIG. 4 is a plan cross-sectional view for explaining a gear box and a lateral holding material swing mechanism according to the present invention.

FIG. 5 is an explanatory view of a horizontal holding material holding mechanism according to the present invention (FIG.
(Enlarged view of the main part of)

6 is a sectional view taken along line 6-6 of FIG.

FIG. 7 is an operation explanatory view of the mower according to the present invention.

FIG. 8 is an explanatory view of another operation of the mower according to the present invention.

[Explanation of symbols]

1 ... Mower, 2 ... Front wheel, 3 ... Rear wheel, 4 ... Engine, 4b
... Engine output shaft, 5 ... Body frame, 5f, 5r ...
Grip, 6 ... Horizontal holding material, 7 ... Cutter housing, 8 ...
Cutter, 9a, 9b ... Operating lever, 10 ... Transmission mechanism, 1
1 ... Drive pulley, 12 ... Belt, 13 ... Followed pulley, 1
5 ... Spline shaft, 17 ... Tensioner, 20 ... Gear box, 21 ... Box body, 22, 23 ... Bevel gear, 2
4 ... Input shaft, 26 ... Output shaft, 30 ... Horizontal holding material swing mechanism,
31 ... Dummy shaft, 32, 35 ... Bearing, 33, 36 ... Arm bracket, 40 ... Side-holding material holding mechanism, 41 ... Frame body,
42 ... Guide roller, 50 ... Horizontal holding material moving mechanism, 51 ...
Rack, 52 ... Pinion, 53 ... Motor, 54 ... Power feeding section, 55 ... Motor control section, L1 ... Center of vehicle width direction of left and right grips, L2 ... Center of vehicle width direction of lower frame, δ ... Offset.

Claims (5)

[Claims] 1. A vehicle body frame having at least two front and rear wheels and an engine, a lateral holding member protruding from the vehicle body frame to the right or left of the vehicle body, and a cutter attached to the end of the lateral holding material, A transmission mechanism for transmitting the power of the engine to the cutter, a horizontal holding material swinging mechanism for holding the horizontal holding material so as to be vertically swingable, and a horizontal holding material for holding the horizontal holding material so as to be movable in the vehicle width direction. A mower comprising a holding mechanism and a horizontal holding material moving mechanism for forcibly moving the held horizontal holding material. 2. The drive mechanism comprises a drive pulley attached to an output shaft of an engine, a driven pulley driven by the drive pulley via a belt, and an input shaft rotated by the driven pulley. The output shaft is rotated through a pair of bevel gears on the input shaft, and the output shaft is a sleeve box with a spline on the inner surface, and a gear box movably fitted to the output shaft and the other end The mower according to claim 1, comprising a spline shaft connected to the cutter. 3. The laterally-held member moving mechanism includes a rack formed on the laterally-held member, and a pinion that meshes with the rack.
2. A motor for rotating the pinion, a power supply unit for supplying power to the motor, and a motor control unit for controlling the motor to adjust the position of the cutter.
The mower mentioned. 4. The body frame has the same front and rear shape,
The mower according to claim 1, further comprising a grip and an operating lever, which are handled by a driver, provided at the front and the rear, respectively. 5. The vehicle body frame includes a lower frame for mounting front and rear wheels, and an upper frame for mounting a grip and an operating lever handled by a driver. The vehicle frame has left and right grips with respect to the center of the vehicle width direction of the lower frame. The mower according to claim 1, wherein the center in the width direction is offset in a direction away from the cutter.