JP2020000115A - Sulky type lawn mower - Google Patents

Abstract

To provide a sulky type lawn mower capable of using an engine with small output and with less discharge of an exhaust gas for achieving a large exhaust gas suppression effect and comprising a collector for accumulating a large amount of reaped lawn.SOLUTION: There is provided a sulky type lawn mower comprising a mower deck 1 on a front part of a travel vehicle body 4 supported by front wheels 2L, 2R and rear wheels 3L, 3R, and comprising an operator seat 10 on which an operator gets, and a collector 11 for accumulating reaped lawn on the travel vehicle body 4. The sulky type lawn mower further comprises: a front wheel drive motor 20 for driving front wheels 2L, 2R; a rear wheel drive motor 23 for driving rear wheels 3L, 3R; and blade motors 7L, 7R for driving a reaping blade of the mower deck 1, and on the sulky type lawn mower, a battery 15 for supplying power to the front wheel drive motor 20, the rear wheel drive motor 23, and the blade motors 7L, 7R and an engine 16 with a power generator 17 for charging the battery 15, are mounted on the travel vehicle body 4 on a lower part of the collector 11.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a hybrid riding lawn mower including an engine and an electric motor as power sources.

  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 to drive the vehicle by driving the front and rear wheels with an electric motor. Since a large and high output engine is used, the effect of suppressing exhaust gas is small.

Japanese Patent No. 5779858

  SUMMARY OF THE INVENTION It is an object of the present invention to provide a riding lawn mower having a large exhaust gas suppressing effect and a collector for storing a large amount of mowing lawn by using a small output engine that emits little exhaust gas.

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

  The invention according to claim 1 includes a mower deck 1 at a front portion of a traveling vehicle body 4 supported by front wheels 2L and 2R and rear wheels 3L and 3R, and a driver's seat 10 on which the operator rides on the traveling vehicle body 4 and a mowing lawn. In a riding lawn mower provided with a collector 11 for storing, 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 cutting blade of the mower deck 1. , 7R, and an engine 16 having a battery 15 for supplying electric power to the front wheel drive motor 20, the rear wheel drive motor 23 and the blade motors 7L, 7R, and a generator 17 for charging the battery 15 runs under the collector 11. A riding lawnmower characterized by being mounted on the vehicle body 4.

  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 and the rear wheel drive motor 23 can be charged while the battery 15 is appropriately charged by the generator 17 without enclosing the battery 15, the engine 16 and the generator 17 in the lower part of the collector 11 to enlarge the body. In addition, since the blade motors 7L and 7R are driven by electric power, the generator 17 can be driven by a small engine 16 that emits less exhaust gas, thereby reducing environmental pollution.

  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.

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

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

  The riding lawn mower of the present embodiment mower deck 1 is connected to the lower front part of the traveling vehicle body 4 by a link so as to be able to move up and down by mower lift cylinders 6L and 6R so as to be able to move up and down. It has a blower 12 for conveying, and a collector 11 for accommodating the cut grass on the upper side thereafter. Blade motors 7L and 7R for rotating and driving the cutting blade 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.

  An engine 16 having a battery 15 and a generator is mounted on the traveling vehicle body 4 below the collector 11. 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. In addition to the driving battery 15, a DC battery as a power source for lights and the like may be provided outside the engine 16 and the generator 17.

  FIG. 4 shows a power transmission system for the front wheels 2L and 2R and the rear wheels 3L and 3R. The left and right front wheels 2L are output from a front wheel drive motor 20 having an output shaft directed forward via a front differential mechanism 21 and left and right reduction mechanisms 22L and 22R. , 2R and from the rear wheel drive motor 23 whose output shaft is directed rearward to the left and right rear wheels 3L, 3R via a rear differential mechanism 24 and left and right reduction mechanisms 25L, 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 generator 17 driven by the engine 16 is supplied to the battery 15 and the electric power is further supplied to the motor drive unit 27. Power is supplied to the front wheel drive motor 20 and the rear wheel drive motor 23, the blade motors 7L and 7R, the blower motor 12M for driving the blower 12, the mower lift cylinders 6L and 6R, the collector lift cylinders 13L and 13R, and the collector dump cylinders 14L and 14R. You.

  The motor control device 30 receives the rotation speed from the front shaft rotation sensor 19F and the rear shaft rotation sensor 19R, and outputs a forward / reverse operation unit 31, a blade operation unit 32, a blower operation unit 33, a mower operation unit 34, Operation signals of the operation unit 35 and the collector dump operation unit 36 are input, and 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. The sensor value of the height 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.

  The timing at which the generator 16 is driven and charged by the engine 16 is when the remaining capacity of the battery 15 drops below a certain standard, but when the traveling motors of the front wheel drive motor 20 and the rear wheel drive motor 23 are used. The driving motor drive and the driving of the mower deck 1> the driving of the mower deck 1 and the stopping of the mower deck 1> In the reference pattern, 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.

  Alternatively, the battery 15 may be charged by being connected to another power source via an outlet.

  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 body 7L, 7R Blade motor 9 Steering handle 10 Driver's seat 11 Collector 12 Blower 15 Battery 16 Engine 17 Generator 20 Front wheel drive motor 23 Rear wheel drive motor

Claims (3)

  A moor deck (1) is provided at the 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 is mounted on the traveling vehicle body (4). ) And a collector (11) for storing the harvested lawn, after driving the front wheel drive motor (20) for driving the front wheels (2L, 2R) and the rear wheels (3L, 3R). A wheel drive motor (23) and a blade motor (7L, 7R) for driving the cutting blade of the mower deck (1) are provided, and the front wheel drive motor (20), the rear wheel drive motor (23) and the blade motor (7L) are provided. , 7R) and an engine (16) including a generator (17) for charging the battery (15) is mounted on the traveling vehicle body (4) below the collector (11). Features Riding lawn mower that.   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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