JP2024040577A - Slope weeding vehicle - Google Patents

Abstract

[Problem] To provide a slope weeding vehicle in which the rotational torque for engine rotation can be reduced, the torque is uniform without affecting the inclination angle of the engine, and the device can be downsized. [Solution] A base frame 4 to which an engine 3 is fixed. However, a plurality of curved rails 5 curved downward in a semicircular shape around the clutch PTO shaft 3a of the engine 3 are freely rotatable in the width direction line direction of the traveling vehicle body on a plurality of rollers 7 provided on the vehicle body frame 6. The rotating force of the gear motor 8 provided on the vehicle body frame 6 is transmitted to the rack gear 9 provided on the base frame 4 curved downward in a semicircular shape to rotate the base frame 4. The tilt of the engine 3 is corrected by rotating the frame 4. [Selection diagram] Figure 6

Description

The present invention relates to a technique for preventing an engine from seizing due to running out of engine oil due to the engine tilting when a slope weeding vehicle runs on a slope.

Conventionally, vehicles used for weeding slopes have a mechanism that prevents the engine from seizing by installing an engine that is the power source so that its mounting angle can be changed, and keeping the engine horizontal by expanding and contracting an electric cylinder. (See Patent Documents 1 and 2).

JP2017-87783A JP2020-142660A

However, in order to rotate the engine, an electric cylinder attached to the vehicle body frame is extended and contracted, but the farther the point of action for rotation is from the center, the longer the electric cylinder's expansion and contraction stroke is required. There is a problem that the whole becomes large.

Therefore, an object of the present invention is to provide a slope weeding vehicle in which the rotational torque for engine rotation can be reduced, the torque is uniform without affecting the inclination angle of the engine, and the device can be miniaturized.

In order to solve the above problem, a slope weeding vehicle according to claim 1 is provided, in which a base frame to which an engine is fixed has a plurality of curved rails curved downward in a semicircular shape centered on the clutch PTO axis of the engine, and a plurality of curved rails are provided on the vehicle body frame. It runs on multiple rollers and is rotatably mounted in the width direction of the vehicle body.
The rotating force of the gear motor provided on the vehicle body frame is transmitted to the rack gear provided on the base frame curved downward in a semicircular shape to rotate the base frame, thereby rotating the base frame against the inclination of the traveling vehicle body, thereby increasing the engine speed. It is characterized by correcting the inclination.

A slope weeding vehicle according to a second aspect of the invention is the slope weeding vehicle according to the first aspect, wherein the vehicle body frame includes a tilt angle sensor of the traveling vehicle body and a tilt angle signal of the traveling vehicle body detected by the tilt angle sensor. The vehicle is characterized by comprising a control means for correcting the inclination of the engine by driving the gear motor to rotate the base frame in response to the inclination of the traveling vehicle body.

The slope weeding vehicle according to claim 3 is the slope weeding vehicle according to claim 2, wherein the control means controls the inclination angle of the base frame so that the angle of the engine is such that the engine does not run out of oil. .

The slope weeding vehicle according to claim 4 is the slope weeding vehicle according to claims 1 to 3, comprising:
The vehicle body frame is characterized in that a rotary damper is provided on the vehicle body frame, the gear portion of which meshes with the rack gear of the base frame.

In the slope weeding vehicle of the present invention, as mentioned above, the rack gear of the base frame for rotating the engine is located at a position away from the center of rotation of the engine, so the rotational torque can be reduced, and the Since the gear motor can be driven with uniform torque regardless of the tilt angle, the device itself can be miniaturized.

Furthermore, by supporting the weight of the engine with a plurality of rollers and distributing the component arrangement, it is possible to achieve a lower center of gravity, which is advantageous for sloped surfaces.

Further, by providing a tilt angle sensor of the traveling vehicle body and a control means for correcting the tilt of the engine, it is possible to automatically correct the tilt of the engine.

In addition, by providing a rotary damper that meshes the gear part with the rack gear of the base frame, the rotational force applied to the rack gear is suppressed by the rotary damper, which alleviates the impact applied to the gear part of the gear motor and rack gear and prevents damage. can do.
Furthermore, the rotary damper suppresses small vibrations of the engine due to backlash provided in the gear section, thereby achieving the effect of reducing engine vibration.

1 is a front view showing the slope weeding vehicle of Example 1. FIG. It is a rear view of the same. FIG. It is the same side view. FIG. 2 is a front view showing the engine tilt device (when the ground is flat). FIG. 3 is a rear view showing the engine tilt device (when the ground is tilted to the right). FIG. 3 is a rear view showing the engine tilt device (when the ground is tilted to the left). 1 is a side view showing the slope weeding vehicle of Example 1. FIG. FIG. 2 is a plan view showing details of a mower device in the slope weeding vehicle of Example 1. It is a top view which shows the normal position of the weeding device in a mower apparatus. It is a top view which shows the sliding position of the weeding device in a mower apparatus.

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

First, the slope weeding vehicle of this first embodiment will be explained based on the drawings.
As shown in FIGS. 1 to 4, the slope weeding vehicle of Example 1 includes a traveling drive device 1, a weeding device 2, an engine tilt device of an engine 3 that drives the weeding device 2, and a mower device of the weeding device 2. The main components are a lifting device and a lifting device.

The travel drive device 1 drives the vehicle body to travel in the longitudinal direction on an endless track 1b driven by a travel drive motor (axial motor) 1a.
The driving operation of the traveling device 1 is performed by remote control.

The weeding device 2 includes a cutting blade 2a and is provided on the front side of the vehicle body via a mower device and a lifting device.

The engine tilt device is a device that corrects the inclination of the engine 3 in the horizontal direction with respect to the inclination of the traveling vehicle body during weeding work on a slope, and this engine tilt device, as shown in FIGS. 5 to 9, A base frame 4 to which an engine 3 is fixed runs on a plurality of curved rails 5 which are curved downward in a semicircular shape centering on a clutch PTO shaft 4a of a mower clutch 41, and runs on a plurality of rollers 7 provided on a vehicle body frame 6. It is mounted so that it can rotate freely in the widthwise line direction.

Also, by transmitting the rotational force of the pinion gear 8a of the gear motor 8 provided on the vehicle body frame 6 to the rack gear 9 provided on the base frame 4 curved downward in a semicircular shape and rotating the base frame 4, the tilt of the traveling vehicle body can be adjusted. On the other hand, the base frame 4 is rotated to correct the tilt of the engine 3.

Further, as shown in FIG. 8, the vehicle body frame 6 is provided with a tilt angle sensor 10 for the traveling vehicle body, and a gear motor 8 that drives the gear motor 8 based on the tilt angle signal of the traveling vehicle body detected by the tilt angle sensor 10. A control means 11 is provided for correcting the inclination of the engine 3 by rotating the base frame 4 with respect to the inclination of the traveling vehicle body.

Further, the control means 11 controls the inclination angle of the base frame 4 in response to changes in the inclination angle of the traveling vehicle body so that the angle of the engine 3 is such that the engine 3 does not run out of engine oil.

Further, the vehicle body frame 6 is provided with a rotary damper 12 whose gear portion 12a meshes with the rack gear 9 of the base frame 4.

The mower device is a device that slides the weeding device 2 in the width direction of the traveling vehicle body, which is equipped with an engine 3 that drives the weeding device 2.
That is, as shown in FIGS. 9 to 11, a mower cover 2b of the weeding device 2 is equipped with a rotary shaft 45 for a cutting blade inside the mower cover 2b, and the mower cover 2b has a structure in which the upper and lower slide links 2d are bridged on both sides of the mower cover 2b. is supported.
Further, a cutting blade rotating shaft 45 is attached to the inside of the mower cover 2b of the weeding device 2, and the mower cover 2b is supported on both sides of the mower cover 2b with a structure in which two upper and lower slide links 2d are bridged.

The weeding device 2 also includes an elevating link 13 that is movable up and down about a pivot point 13a at the tip of the traveling vehicle body, and the tip of the elevating link 13 is attached to a resin bush (doughnut-shaped) with respect to the slide link 2c. ) 13b.
The weeding device 2 in the mower device is slid manually. Further, the resin bush (doughnut-shaped) 13b is provided with a slide lock pin 13c for stopping the slide.

Further, the weeding device 2 can be raised and lowered relative to the traveling vehicle body via a slide link 2d by driving an elevator hydraulic cylinder 13d provided in the elevator link 13. In addition, in FIG. 8, 13e is a hydraulic pump, and 13f is an oil cooler.

Further, as shown in FIG. 9, the driving force of the engine 3 is transferred to mower clutch 41 → univar joint 42 → gear box 43 → drive shaft 44 . The signal is transmitted to the cutting blade 2a of the blade device 2.

Next, the operation of the engine tilt device in the slope weeding vehicle of Example 1 will be explained.
In the engine tilt device of the first embodiment, when the ground G is flat, the engine 3 is maintained in a horizontal state as shown in FIG.
Further, as shown in FIG. 6, when the ground G is tilted to the right, the tilt angle sensor 10 of the traveling vehicle body detects a change in the tilt angle of the traveling vehicle body, and based on this detection data, the control means 11 controls the gear motor 8. The pinion gear 8a is rotationally driven in the clockwise rotation direction, the rack gear meshed with the rack gear 9 is rotated in the clockwise rotation direction, and the base frame is rotated in the counterclockwise rotation direction along the curved rail, thereby changing the tilt of the engine in the horizontal direction. Correct.
Further, as shown in FIG. 7, when the ground G is tilted to the left, the tilt angle sensor 10 of the traveling vehicle body detects a change in the tilt angle of the traveling vehicle body, and based on this detection data, the control means 11 controls the gear motor 8. The pinion gear 8a is rotationally driven in the left rotation direction, the rack gear meshed with the rack gear 9 is rotated in the left rotation direction, and the base frame is rotated in the right rotation direction along the curved rail, thereby making the tilt of the engine horizontal. Correct the direction.

Next, the effects of Embodiment 1 will be explained. In the slope weeding vehicle of the embodiment of the present invention, as described above, the rack gear 9 of the base frame 4 for engine rotation is located at a position away from the center of rotation of the engine 3. Because of this arrangement, rotational torque can be reduced, and furthermore, the gear motor 8 can be driven with uniform torque without affecting the inclination angle of the engine 3, resulting in the effect that the device itself can be made smaller.

Further, by bearing the weight of the engine 3 with a plurality of rollers 7 and distributing the arrangement of parts, it is possible to achieve the effect of lowering the center of gravity, which is advantageous for sloped surfaces.

Furthermore, by providing the tilt angle sensor 10 of the traveling vehicle body and a control means for correcting the tilt of the engine, the tilt of the engine can be corrected automatically.

In addition, by providing a rotary damper 12 that meshes the gear part with the rack gear 9 of the base frame 4, the rotational force applied to the rack gear 9 is suppressed by the rotary damper 12, so that the rotational force applied to the gear motor 8 and the gear part of the rack gear 9 is suppressed. It can reduce impact and prevent damage.
Further, the rotary damper 12 suppresses small vibrations of the engine 3 due to backlash provided in the gear portion, thereby achieving the effect of reducing vibrations of the engine 3.

Although the present embodiment has been described above, the present invention is not limited to the above-described embodiment, and even if there is a design change or the like within a range that does not depart from the gist of the present invention, it is included in the present invention.

For example, in the first embodiment, an endless track is used, but the present invention is not limited to this, and wheels may be used.

1 Travel drive device 1a Travel drive motor (axial motor)
1b Endless track 2 Weeding device 2a Cutting blade 2b Mower cover 2c Slide link 3 Engine 4 Base frame 41 Mower clutch 42 Universal joint 43 Gear box 44 Drive shaft 45 Rotating shaft for cutting blade (mower shaft)
5 Curved rail 6 Vehicle frame 7 Roller 8 Gear motor 8a Pinion gear 9 Rack gear 10 Inclination angle sensor 11 Control means 12 Rotary damper 12a Gear portion 13 Lifting link 13a Rotating fulcrum 13b Resin bush (donut type)
13c Slide lock pin 13d Lifting hydraulic cylinder 13e Hydraulic pump 13f Oil cooler G Ground

Claims (4)

The base frame to which the engine is fixed rotates in the widthwise line direction of the vehicle body, with multiple curved rails curved downward in a semicircle around the engine clutch PTO shaft running on multiple rollers provided on the vehicle body frame. freely mounted,
The rotating force of the gear motor provided on the vehicle body frame is transmitted to the rack gear provided on the base frame curved downward in a semicircular shape to rotate the base frame, thereby rotating the base frame against the inclination of the traveling vehicle body, thereby increasing the engine speed. A slope weeding vehicle characterized by correcting the slope. 2. The slope weeding vehicle according to claim 1, wherein the vehicle body frame is provided with a tilt angle sensor of the traveling vehicle body, and the gear motor is driven based on the tilt angle signal of the traveling vehicle body detected by the tilt angle sensor. A slope weeding vehicle characterized by comprising a control means for correcting the inclination of an engine by rotating a base frame with respect to an inclination. 3. The slope weeding vehicle according to claim 2, wherein the control means controls the inclination angle of the base frame so that the angle of the engine does not run out of engine oil. In the slope weeding vehicle according to claims 1 to 3,
A slope weeding vehicle characterized in that the body frame is provided with a rotary damper whose gear portion meshes with a rack gear of the base frame.

Images