Slope weeding vehicle

Abstract

To provide a slope weeding vehicle which can reduce the rotation torque for engine rotation, has uniform torque without influence on the inclination angle of an engine and can reduce the size in the device.SOLUTION: A base frame 4 fixed with an engine 3 is mounted such that a plurality of bent rails 5 bent in a downward semicircular shape with a clutch PTO shaft 3a of the engine 3 as the center can rotate in the width direction line direction of a travel vehicle body on a plurality of rollers 7 provided in a vehicle body frame 6. The rotation force of a gear motor 8 in the vehicle body frame 6 is transmitted to a rack gear 9 in the base frame 4 bent in the downward semicircular shape, and the inclination of the engine 3 is corrected by rotating the base frame 4 with respect to the inclination of the travel vehicle body by rotating the base frame 4.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to a technique for preventing seizure of an engine due to engine oil starvation caused by the inclination of the engine when a slope weeding vehicle travels on a slope.

Background Art

[0002] Conventionally, in a vehicle for performing slope weeding work, there is a technique having a mechanism for preventing seizure of the engine by mounting the engine, which is a power source, at an angle that can be changed and keeping the engine horizontal by the expansion and contraction of an electric cylinder (see Patent Documents 1 and 2).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in order to rotate the engine, it is performed by the expansion and contraction of an electric cylinder attached to the vehicle body frame. However, the farther the acting point for rotation is from the center, the longer the expansion and contraction stroke of the electric cylinder is required, and there is a problem that the entire device becomes large.

[0005] Therefore, an object of the present invention is to provide a slope weeding vehicle that can reduce the rotational torque for engine rotation, has uniform torque without affecting the inclination angle of the engine, and can be downsized.

Means for Solving the Problems

[0006] To solve the above problems, the slope weeding vehicle described in claim 1 has a base frame to which the engine is fixed, and multiple curved rails that are curved downward in a semicircular shape around the engine's clutch PTO shaft are mounted so as to be rotatable in the width direction of the running vehicle body on multiple rollers provided on the vehicle body frame. The rotational force of a gear motor mounted on the vehicle body frame is transmitted to a rack gear mounted on a base frame that is curved downward in a semicircular shape, thereby rotating the base frame and correcting the tilt of the engine in response to the inclination of the vehicle body.

[0007] The slope weeding vehicle according to claim 2 is characterized in that, in the slope weeding vehicle according to claim 1, the vehicle frame is provided with a vehicle body tilt angle sensor and a control means that drives the gear motor based on the vehicle body tilt angle signal detected by the vehicle body tilt angle sensor to rotate the base frame in relation to the tilt of the vehicle body and correct the tilt of the engine.

[0008] The slope weeding vehicle according to claim 3 is characterized in that, in the slope weeding vehicle according to claim 2, the control means controls the inclination angle of the base frame so that the engine angle does not run out of engine oil.

[0009] The slope weeding vehicle described in claim 4 is the slope weeding vehicle described in claims 1 to 3, The vehicle body frame is characterized by being equipped with a rotary damper that engages its gear portion with the rack gear of the base frame. [Effects of the Invention]

[0010] In the slope weeding vehicle of the present invention, as described above, the rack gear of the base frame for engine rotation is positioned away from the engine's rotation center, which reduces the rotational torque. Furthermore, the gear motor can be driven with uniform torque regardless of the engine's tilt angle, resulting in the ability to miniaturize the device itself.

[0011] Furthermore, by using multiple rollers to support the engine's weight and distributing the placement of components, it is possible to achieve a lower center of gravity, which is advantageous on inclined surfaces.

[0012] Furthermore, by equipping the vehicle with a tilt angle sensor and a control means for correcting the engine's tilt, the engine's tilt can be automatically and correctly corrected.

[0013] Furthermore, by providing a rotary damper that engages with the gear portion of the rack gear of the base frame, the rotational force acting on the rack gear can be suppressed by the rotary damper, thereby mitigating the impact on the gear motor and the gear portion of the rack gear and preventing damage. Furthermore, the rotary damper suppresses small engine vibrations caused by backlash in the gear section, thereby reducing engine vibration. [Brief explanation of the drawing]

[0014] [Figure 1] This is a front view showing the slope weeding vehicle of Example 1. [Figure 2] This is a rear view of the same object. [Figure 3] The same plane diagram. [Figure 4] This is a side view of the same object. [Figure 5] This is a front view showing the engine tilt device (when the ground is level). [Figure 6] This is a rear view showing the engine tilt device (when the ground is tilted to the right). [Figure 7] This is a rear view showing the engine tilt device (when the ground is tilted to the left). [Figure 8] This is a side view showing the slope weeding vehicle of Example 1. [Figure 9] This is a plan view showing the details of the mower device in the slope weeding vehicle of Example 1. [Figure 10] This is a plan view showing the normal position of the weeding device in a mower system. [Figure 11] This is a plan view showing the sliding position of the weeding device in a mower system.

Best Mode for Carrying Out the Invention

[0015] Hereinafter, embodiments of this invention will be described based on the drawings. Hereinafter, the present invention will be described based on the drawings.

Embodiment

[0016] First, the slope weeding vehicle of this Embodiment 1 will be described based on the drawings. As shown in FIGS. 1 to 4, the slope weeding vehicle of this Embodiment 1 mainly includes a traveling drive device 1, a weeding device 2, an engine tilt device for the engine 3 that drives the weeding device 2, a mower device of the weeding device 2, and a lifting device.

[0017] The traveling drive device 1 drives the traveling vehicle body to travel in the front-rear direction by an endless track 1b driven by a traveling drive motor (axial motor) 1a. The drive operation of the traveling device 1 is performed by remote control.

[0018] The weeding device 2 includes a cutting blade 2a and is provided on the front side of the traveling vehicle body via a mower device and a lifting device.

[0019] The engine tilt device is a device that corrects the tilt of the engine 3 in the horizontal direction with respect to the tilt of the traveling vehicle body during weeding work on an inclined surface. As shown in FIGS. 5 to 9, this engine tilt device has a base frame 4 that fixes the engine 3, and a plurality of curved rails 5 that are curved downward in a semi-circular shape around the clutch PTO shaft 4a of the mower clutch 41 are rotatably mounted on a plurality of rollers 7 provided on the vehicle body frame 6 in the width direction line direction of the traveling vehicle body.

[0020] Also, the rotational force of the pinion gear 8a 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 that is curved downward in a semi-circular shape, and the base frame 4 is rotated to rotate the base frame 4 with respect to the tilt of the traveling vehicle body so as to correct the tilt of the engine 3.

[0021] Furthermore, as shown in Figure 8, the vehicle frame 6 is equipped with a vehicle body tilt angle sensor 10 and a control means 11 that drives the gear motor 8 based on the vehicle body tilt angle signal detected by the tilt angle sensor 10 to rotate the base frame 4 in relation to the tilt of the vehicle body and correct the tilt of the engine 3.

[0022] Furthermore, the control means 11 controls the inclination angle of the base frame 4 in response to changes in the inclination angle of the vehicle body so that the engine 3 is at an angle that prevents engine oil from running out.

[0023] Furthermore, the vehicle body frame 6 is provided with a rotary damper 12 whose gear portion 12a engages with the rack gear 9 of the base frame 4.

[0024] The aforementioned mower device is a device that slides the weeding device 2 in the width direction of the vehicle body relative to the vehicle body which is equipped with an engine 3 that drives the weeding device 2. Specifically, as shown in Figures 9-11, a rotating shaft 45 for the cutting blade is mounted inside the mower cover 2b of the weeding device 2, and the mower cover 2b is supported by a structure in which two upper and lower slide links 2d bridge across both sides of the mower cover 2b. Furthermore, a rotating shaft 45 for the cutting blade is mounted inside the mower cover 2b of the weeding device 2, and the mower cover 2b is supported by a structure in which two slide links 2d are bridged across both sides of the mower cover 2b.

[0025] Furthermore, the weeding device 2 is equipped with a lifting link 13 that can rotate up and down around a pivot point 13a at the front of the vehicle body, and the tip of the lifting link 13 is slidably connected to the slide link 2c via a resin bush (donut-shaped) 13b. The sliding of the weeding device 2 in the mower device is operated manually. The resin bush (donut-shaped) 13b is also equipped with a slide lock pin 13c to stop the sliding.

[0026] Furthermore, the weeding device 2 can be raised and lowered relative to the vehicle body via a slide link 2d by driving a lifting hydraulic cylinder 13d located within the lifting link 13. In Figure 8, 13e is a hydraulic pump and 13f is an oil cooler.

[0027] Furthermore, as shown in Figure 9, the driving force of the engine 3 is transmitted to the cutting blade 2a of the cutting blade device 2 via the mower clutch 41 → universal joint 42 → gearbox 43 → drive shaft 44... → rotating shaft for cutting blade (mower shaft) 45.

[0028] Next, the operation of the engine tilt device in the slope weeding vehicle of Example 1 will be explained. In this embodiment 1, when the ground G is flat, the engine 3 is maintained in a horizontal position, as shown in Figure 5. Furthermore, as shown in Figure 6, when the ground G is tilted to the right, the vehicle body tilt angle sensor 10 detects the change in the vehicle body's tilt angle. Based on this detected data, the control means 11 rotates the pinion gear 8a of the gear motor 8 in a clockwise direction, causing the rack gear 9, which is meshed with the rack gear, to rotate clockwise, thereby rotating the base frame counterclockwise along the curved rail, and correcting the engine's tilt to a horizontal direction. Furthermore, as shown in Figure 7, when the ground G is tilted to the left, the vehicle body tilt angle sensor 10 detects the change in the vehicle body's tilt angle. Based on this detected data, the control means 11 rotates the pinion gear 8a of the gear motor 8 in the counterclockwise direction, causing the rack gear 9, which is meshed with the rack gear, to rotate in the counterclockwise direction, thereby rotating the base frame along the curved rail in the clockwise direction, and correcting the engine's tilt to the horizontal direction.

[0029] Next, we will explain the effects of Example 1. 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 positioned away from the rotation center of the engine 3, so the rotation torque can be reduced, and furthermore, the gear motor 8 can be driven with uniform torque regardless of the tilt angle of the engine 3, so the device itself can be made smaller.

[0030] Furthermore, by using multiple rollers 7 to support the weight of the engine 3 and distributing the placement of components, it is possible to achieve a lower center of gravity, which is advantageous on inclined surfaces.

[0031] Furthermore, by providing a vehicle body tilt angle sensor 10 and a control means for correcting the engine's tilt, the engine's tilt can be automatically and correctly corrected.

[0032] Furthermore, by providing a rotary damper 12 that engages the gear portion 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, thereby mitigating the impact on the gear motor 8 and the gear portion of the rack gear 9 and preventing damage. Furthermore, the rotary damper 12 suppresses small vibrations of the engine 3 caused by backlash in the gear section, thereby reducing the vibration of the engine 3.

[0033] Although this embodiment has been described above, the present invention is not limited to the embodiments described above, and any design changes, etc., that do not depart from the spirit of the present invention are also included in the present invention.

[0034] For example, in Example 1, a continuous track was used, but the system is not limited to this and wheels may also be used. [Explanation of Symbols]

[0035] 1. Driving system 1a. Driving motor (axial motor) 1b endless track 2 Weeding device 2a cutting blade 2b More Cover 2c slide link 3 Engines 4 Base Frame 41 More Clutch 42 Universal Joint 43 Gearbox 44 drive shafts 45. Rotating shaft for mower blades (mower shaft) 5 Curved rails 6. Vehicle frame 7 Laura 8 Gear motor 8a Pinion Gear 9 Rack gear 10 Tilt Angle Sensor 11 Control means 12 Rotary damper 12a Gear section 13 Lifting Link 13a Pivot 13b Resin bushing (donut-shaped) 13c slide lock pin 13d Lifting hydraulic cylinder 13e Hydraulic Pump 13f Oil Cooler G ground

Claims

1. The base frame to which the engine is fixed is mounted so that multiple curved rails, which are curved downward in a semicircular shape around the engine's clutch PTO shaft, can rotate freely in the width direction of the vehicle body on multiple rollers provided on the vehicle body frame. A slope weeding vehicle characterized by transmitting the rotational force of a gear motor mounted on the vehicle body frame to a rack gear mounted on a downwardly curved semicircular base frame, thereby rotating the base frame and correcting the tilt of the engine in response to the inclination of the vehicle body.

2. A slope weeding vehicle according to claim 1, characterized in that the vehicle frame is provided with a vehicle body tilt angle sensor and a control means that drives the gear motor based on the vehicle body tilt angle signal detected by the vehicle body tilt angle sensor to rotate the base frame in relation to the tilt of the vehicle body and correct the tilt of the engine.

3. A slope weeding vehicle according to claim 2, characterized in that the control means controls the inclination angle of the base frame so that the engine angle does not run out of engine oil.

4. In a slope weeding vehicle according to any one of claims 1 to 3, A slope weeding vehicle characterized by providing the vehicle body frame with a rotary damper that engages its gear portion with the rack gear of the base frame.

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