JP2020000114A - Riding lawn mower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent environmental pollution in a riding type lawnmower which mounts a large-capacity battery on a traveling vehicle body and performs lawn mowing while traveling with electric power. SOLUTION: A mower deck 1 is provided in front of a traveling vehicle body 4 supported by front wheels 2L, 2R and rear wheels 3L, 3R, and a driver's seat 10 on which an operator rides and a collector 11 for accumulating cut grass are placed on the traveling vehicle body 4. In the riding lawn mower provided in the A riding type lawnmower in which a battery 15 for supplying electric power is mounted on the traveling vehicle body 4 below the collector 11 is used. [Selection diagram] Figure 2

Description

  The present invention relates to a riding lawn mower in which a battery is mounted as a power source and each operating unit is driven by an electric motor.

  As a riding lawn mower using both an engine and an electric motor, there is a riding lawn mower described in Patent Document 1.

  This riding lawn mower is equipped with a mower deck below the traveling body supported by the front and rear wheels, and a collector that stores the cut grass in the rear of the traveling body, and the power of the engine mounted on the front of the traveling body Is converted into electric power, and the vehicle is driven by driving the front and rear wheels by an electric motor. A large amount of high-output engine emits a large amount of exhaust gas.

Japanese Patent No. 5779858

  SUMMARY OF THE INVENTION It is an object of the present invention to provide a riding lawn mower that mounts a large-capacity battery on a traveling vehicle body and cuts a lawn while traveling with electric power, so as to prevent environmental pollution.

  The object of the present invention is solved by the following technical means.

  The invention of claim 1 is provided with a mower deck 1 at the front of a traveling body 4 supported by front wheels 2L, 2R and rear wheels 3L, 3R, and travels on a driver's seat 10 on which an operator rides and a collector 11 for storing mowing lawn. In a riding lawn mower provided on the vehicle body 4, a front wheel drive motor 20 for driving the front wheels 2L and 2R, a rear wheel drive motor 23 for driving the rear wheels 3L and 3R, and a blade motor 7L for driving the mowing blade of the mower deck 1. , 7R is mounted on the traveling vehicle body 4 below the collector 11 to provide a riding lawn mower.

  According to a second aspect of the present invention, there is provided a riding lawn mower according to the first aspect, wherein blade motors 7L and 7R for driving the mowing blade of the mower deck 1 are provided on an upper portion of a case of the mower deck 1.

  The invention according to claim 3 is characterized in that a steering handle 9 and a driver's seat 10 are provided at a front portion of the traveling vehicle body 4, and a motor-driven blower 12 that sends the cut grass to the collector 11 is provided below the driver's seat 10. A riding lawn mower according to claim 1 or claim 2.

  According to the first aspect of the present invention, since the collector 11 for storing the cut lawn is provided on the traveling vehicle body 4, the collector 11 can be made large and large in capacity, and a riding lawn mower with high cutting and collecting efficiency can be obtained. However, the front wheel drive motor 20, the rear wheel drive motor 23, and the blade motors 7L and 7R are driven by the power of the battery 15 without enclosing the battery 15 in the lower part of the collector 11 and enlarging the body. There is no contamination.

  In the invention of claim 2, in addition to the effect of claim 1, by driving the mowing blade of the mower deck 1 with the blade motors 7L and 7R, the power transmission configuration is simplified, and the mower deck 1 is provided in the front space of the traveling vehicle body 4. Can be easily moved up and down.

  According to the third aspect of the present invention, in addition to the effects of the first or second aspect, the motor-driven blower 12 that sends the cut lawn to the collector 11 is provided below the driver's seat 10, so that the mounting space for the battery 15 is reduced. The battery 15 having a sufficiently large capacity can be mounted without being narrowed.

It is a right view of the riding type mower of this invention. It is a sectional side view of the riding type mower. It is a top view of the same riding type mower. FIG. 3 is a power transmission diagram of the traveling device. It is a control block diagram of electric power supply. It is a flowchart figure of monitoring and display of a battery.

  Hereinafter, embodiments of the present invention will be described with reference to examples shown in the drawings. In the description of the embodiments, the left and right directions are referred to as left and right, respectively, with respect to the forward direction of the aircraft, the forward direction is referred to as front, and the reverse direction is referred to as rear, but this does not limit the configuration of the present invention.

  The configuration and operation of the riding lawn mower will be described.

  The riding lawn mower according to the present embodiment includes a mower deck 1 connected to a lower front portion of a traveling vehicle body 4 by a link so as to be able to move up and down by mower lift cylinders 6L and 6R, and a blower for sucking and transporting the cut grass to the rear side. And a collector 11 on the upper side for storing the cut grass. Blade motors 7L and 7R for rotating and driving a cutting blade for cutting lawn grass are provided on the upper right and left sides of the mower deck 1. Further, the collector 11 is raised with respect to the traveling vehicle body 4 by the collector lift cylinders 13L and 13R and the collector dump cylinders 14L and 14R and dumped rearward so that grass inside can be discharged.

  A driver's seat 10 is provided on the traveling vehicle body 4 in front of the collector 11. A steering handle 9 for steering operation and an operation panel are provided on a handle post on the front side of the driver's seat 10. Although not shown in the drawings, steps include a forward pedal, a reverse pedal, a brake pedal, and the like. Is provided, and an operator can perform a steering operation while sitting on the driver's seat 10.

  A loading frame 16 constituting the traveling vehicle body 4 is provided below the collector 11, a battery 15 is mounted thereon, and a motor control unit 27 housed in a casing is mounted thereon. A motor electrode is provided on the upper surface of the battery 15, and the wiring is covered with the motor control unit 27, and the wiring exits from the side of the motor control unit 27. The battery 15 may be additionally provided separately on the front wheels 2L and 2R on the left and right sides of the driver's seat 10 and covered with a cover. Further, in addition to the driving battery 15, a DC battery 29 may be provided as a power source for a light or the like.

  FIG. 4 shows a power transmission system for the left front wheels 2L and 2R and the rear wheels 3L and 3R. The left and right front wheels are driven by a front differential drive mechanism 21 and left and right reduction mechanisms 22L and 22R from a front wheel drive motor 20 whose output shaft is directed forward. The power is transmitted to the left and right rear wheels 3L and 3R via the rear differential mechanism 24 and the left and right reduction mechanisms 25L and 25R. The rotation of the front wheel drive motor 20 is detected by the front shaft rotation sensor 19F, and the rotation of the rear wheel drive motor 23 is detected by the rear shaft rotation sensor 19R. Since the front wheel drive motor 20 and the rear wheel drive motor 23 are arranged inside the front and rear axles, the traveling vehicle body 4 does not become long.

  The left and right front wheels 2L, 2R and the left and right rear wheels 3L, 3R may be configured as separate wheel electric motors.

  FIG. 5 is a control block diagram of each motor and each electric cylinder. The electric power of the battery 15 is controlled by the motor drive unit 27, and the front wheel drive motor 20, the rear wheel drive motor 23, the blade motors 7L and 7R, and the blower 12 are controlled. Electric power is supplied to the blower motor 12M to be driven, the mower lift cylinders 6L and 6R, the collector lift cylinders 13L and 13R, and the collector dump cylinders 14L and 14R. Further, electric power is supplied from the DC battery 29 to the light and the motor control device 30.

  The number of rotations is input to the motor control device 30 from the front shaft rotation sensor 19F and the rear shaft rotation sensor 19R, and the forward / backward operation unit 31, the blade operation unit 32, the blower operation unit 33, the mower operation unit 34, the collector elevating operation unit 35, an operation signal of the collector dump operation unit 36 is input, a switching signal is input from the 2.4 drive automatic switching 37, a blade shaft (right) rotation sensor 38R, a blade shaft (left) rotation sensor 38L, and a collector lift height. The sensor value of the position sensor 39 is input, and a control signal is output from the motor control device 30 to the motor drive unit 27.

  The 2.4-drive automatic switching 37 determines the slip state of the drive wheel or the overrun state of the non-drive wheel from the ratio of the rotational speed on the drive side to the rotational speed on the non-drive side during traveling by two-wheel drive, and determines whether the slip This is a control to make four-wheel drive at the time of overrun.

  The following control is performed in the motor control device 30.

  First, when the traveling speed of the traveling vehicle body 4 is reduced or braked, the regenerative power is charged from the front wheel drive motor 20 and the rear wheel drive motor 23 to the battery 15, and when the four-wheel drive is switched to the two-wheel drive, the non-drive side By switching the motor to the power generation mode, the regenerative power is charged in the battery 15.

  When the blade operating unit 32 is turned off from on and the blade motors 7L and 7R stop rotating, the mode is switched to the power generation mode to adjust the braking stop time, and the battery 15 is charged with regenerative power. Also, when the cutting blade is turned by an external force, the battery 15 is charged with the regenerative power in the power generation mode.

  When the collector lift cylinders 13L and 13R are raised by the collector lifting / lowering operation section 35, the motor is driven, and when the collector lift cylinders 13L and 13R are lowered, the mode is switched to the power generation mode to charge the battery 15 with regenerative power.

  FIG. 6 is a flowchart showing the charging timing of the battery 15 and the display indicating that traveling is possible.

  The battery 15 is charged by being connected to another power source through an outlet 28. The timing of charging the battery 15 is when the remaining capacity of the battery 15 falls below a certain standard. Separately from the remaining capacity reference when using the traveling motor and the remaining capacity reference when using the electric cylinder, drive the traveling motor and drive the mower deck 1> drive the traveling motor and stop the mower deck 1> traveling motor In the three reference patterns of the stop and the stop of the mower deck 1, it is possible to suppress the fuel consumption of the engine 16 by not charging as much as possible when the load is light.

  In addition, when the remaining capacity of the battery 15 is displayed as a lawn mowing traveling operation, moving traveling only, or a continuation possible time only by driving the mower deck 1, it is possible to know a usable time while the engine 16 is stopped. . The usable time of the front wheel drive motor 20, the rear wheel drive motor 23, the blade motors 7L, 7R, and the electric cylinders can be displayed in color or blinking.

  Further, the charging by the generator and the regenerative charging may be switched.

DESCRIPTION OF SYMBOLS 1 More deck 2L, 2R Front wheel 3L, 3R Rear wheel 4 Running vehicle body 7L, 7R Blade motor 9 Steering handle 10 Driver's seat 11 Collector 12 Blower 15 Battery 16 Loading frame 20 Front wheel drive motor 23 Rear wheel drive motor

Claims (3)

  A driver's seat (10) on which a worker rides and a collector for storing mowing grass are provided with a mower deck (1) at the front of a traveling vehicle body (4) supported by front wheels (2L, 2R) and rear wheels (3L, 3R). (11) In the riding lawnmower provided on the traveling vehicle body (4), after driving the front wheel drive motor (20) for driving the front wheels (2L, 2R) and the rear wheels (3L, 3R). A battery (15) for supplying power to a wheel drive motor (23) and a blade motor (7L, 7R) for driving the cutting blade of the mower deck (1) is provided below the collector (11) to the traveling vehicle body (4). A riding lawn mower characterized by being mounted.   The riding lawnmower according to claim 1, wherein the blade motors (7L, 7R) for driving the mowing blades of the mower deck (1) are provided on an upper portion of a case of the mower deck (1). A steering handle (9) and a driver's seat (10) are provided at a front portion of the traveling vehicle body (4), and a motor-driven blower (12) is provided below the driver's seat (10) to send turf grass to the collector (11). The riding type mower according to claim 1 or 2, wherein

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