Walking-type self-propelled sprayer

Abstract

To provide a walking-type self-propelled sprayer that operates entirely electrically while reducing the cost required for a power source. [Solution] This walking-type self-propelled sprayer 1 comprises a battery 4, a motor 5 that uses power supplied from the battery 4 to rotate a rotating shaft 51 to output rotational power, a spraying device 8 having a drive wheel 62 that rotates around a first axis L1, a storage section 81 that stores granular material, and a rotating body 82 that rotates around a second axis L2 that intersects with the first axis L1 to spread the granular material stored in the storage section 81 over a predetermined area, and a transmission device 9 that has an input section 91a to which the rotational power output by the motor 5 is input, a first output section 91c connected to the drive wheel 62, and a second output section 91d connected to the rotating body 82 of the spraying device 8, and distributes and transmits the rotational power of the motor 5 input from the input section 91a to the first output section 91c and the second output section 91d.

Description

Technical Field

[0001] The present invention relates to a walking-type self-propelled spreader. More specifically, it relates to a walking-type self-propelled spreader that can travel or stop by operating a power change operation member while the operator walks while gripping a handle as a moving direction operation member provided at the rear, and can spread granular materials during travel.

Background Art

[0002] When spreading granular materials such as fertilizers and agricultural chemicals evenly to some extent, a spreader is used that includes a rotating body and a power source for the rotating body, rotates the rotating body with the power from the power source for the rotating body, and scatters the granular materials put into a container such as a hopper by the rotating body over a predetermined range. In particular, when spreading over a relatively wide range, a self-propelled spreader is used that includes traveling wheels and a power source for traveling, and rotates the traveling wheels with the power from the power source for traveling to self-propel while spreading the granular materials. Among them, a so-called walking-type self-propelled spreader that further includes a moving direction operation member such as a handle and a power change operation member for operating the output of the power source, and the operator operates the power change operation member while gripping the moving direction operation member and walking to travel or stop, is widely used. Conventionally, an internal combustion engine has been used as the power source in this walking-type self-propelled spreader, but due to the recent trend of decarbonization, there have also been proposals to replace at least part of the power source with a motor.

[0003] For example, in Patent Document 1, a walking-type self-propelled spreader (chemical agent spreader (1)) is disclosed that travels using a motor (electric motor (14)) as a power source and rotates a rotating body (fan) in a fan case (31) using an internal combustion engine (engine (32)) as a power source to spread chemicals.

[0004] Also, for example, in Non-Patent Document 1, a walking-type self-propelled spreader (electric fertilizer spreader) is disclosed that travels using a motor for traveling as a power source and rotates a rotating body (impeller) using a motor for spreading as a power source to spread fertilizers.

Prior Art Documents

[0005] [Patent Document 1] Japanese Patent Publication No. 2002-345387 [Non-patent literature]

[0006] [Non-Patent Document 1] Product introduction website for the electric fertilizer spreader KT-860XEL (https: / / lp.kaz-corp.com / kt-860xel / ) [Overview of the Initiative] [Problems that the invention aims to solve]

[0007] However, the walk-behind self-propelled sprayer disclosed in Patent Document 1 is equipped with an internal combustion engine as a power source for the rotating body in addition to a motor as a power source for driving, and the walk-behind self-propelled sprayer disclosed in Non-Patent Document 1 is equipped with two motors, one as a power source for the rotating body and another as a power source for driving, and the cost of the power sources tends to increase the product cost. Furthermore, the walk-behind self-propelled sprayer disclosed in Patent Document 1 also uses an internal combustion engine as a power source, and further electrification is desired from the perspective of decarbonization.

[0008] The object of the present invention has been made in view of these points, and is to provide a walk-behind, self-propelled sprayer that operates entirely by electric power while reducing the cost of the power source. [Means for solving the problem]

[0009] To solve the above problems, the walking-type self-propelled sprayer according to the present invention is a walking-type self-propelled sprayer that can be driven or stopped by an operator who grasps a handle, which is a movement direction control member provided at the rear, and operates a power change control member while walking, and can spread granular material while driving. A rechargeable battery, A motor having a rotating shaft, electrically connected to a battery, and using power supplied from the battery to rotate the rotating shaft and output rotational power, A drive wheel that makes contact with the ground and rotates around a first axle that extends along the contact surface, A spreading device having a containment section for receiving granular material that is introduced, and a rotating body located below the containment section and rotating around a second axis intersecting a first axis in order to spread the granular material contained in the containment section over a predetermined area on the ground surface, A transmission device having an input unit to which the rotational power output by the motor is input, a first output unit connected to the drive wheel, and a second output unit connected to the rotating body of the spraying device, which distributes and transmits the rotational power of the motor input from the input unit to the first output unit and the second output unit, It is characterized by being equipped with [the following features].

[0010] In some embodiments of the walking-type self-propelled sprayer according to the present invention, The transmission device transmits the rotation of the motor's rotating shaft to the first and second output units in conjunction with it, without allowing it to spin freely.

[0011] Furthermore, in some embodiments of the walking-type self-propelled sprayer according to the present invention, The spraying device further includes a shutter that can appropriately block the flow path between the containment section and the rotating body.

[0012] Furthermore, in some embodiments of the walking-type self-propelled sprayer according to the present invention, A control unit that includes a variable resistor element electrically connected to a battery and a motor, whose resistance value can be changed by an external knob rotation input, and which has a rotation speed control function that increases or decreases the power supplied from the battery to the motor according to the rotation position of the variable resistor element, A knob rotation input conversion member that converts an external force into a knob rotation input to a variable resistor element of the control unit, It is mechanically connected to the knob rotation input conversion member and is operated by the operator as one of the power change operation members when the operator instructs the motor to accelerate its rotation. When operated, it applies an acceleration instruction member that rotates the knob rotation input conversion member in a direction that increases the power supplied to the motor by the variable resistance element. A deceleration instruction member is mechanically connected to a knob rotation input conversion member and, as another power change operation member, is operated by the operator when instructing the motor to decelerate. When operated, the deceleration instruction member applies an external force to the knob rotation input conversion member so that the knob rotation input conversion member rotates in a direction that reduces the power supplied to the motor by the variable resistance element. It is further equipped with [this feature].

[0013] Furthermore, in some embodiments of the walking-type self-propelled sprayer according to the present invention, The handle is a bar-shaped handle that extends in a rod-like shape, with both ends gripped by the operator with either their left or right hand. The knob rotation input conversion member is connected to a variable resistor element, an acceleration indicator member, and a deceleration indicator member, and has a swinging arm that swings around the connection point with the variable resistor element in response to an external force from the acceleration indicator member or the deceleration indicator member. The acceleration instruction member includes an acceleration lever attached to one end of the handlebar and rotating around a pivot point, and an acceleration wire that connects the acceleration lever and the swing arm, and applies a tensile force to the swing arm so that it rotates in a direction that increases the power supplied to the motor by the variable resistance element in response to input from the operator to the acceleration lever. The deceleration instruction member includes a deceleration lever attached to the other end of the bar handle and rotating around a pivot point, and a deceleration wire that connects the deceleration lever and the swing arm, and applies a tensile force to the swing arm so that it rotates in a direction that reduces the power supplied to the motor by the variable resistance element in response to input from the operator to the deceleration lever.

[0014] Furthermore, in some embodiments of the walking-type self-propelled sprayer according to the present invention, The acceleration lever and the deceleration lever are interlocked with each other such that forces are transmitted between them via a wire on the acceleration side, a wire on the deceleration side, and a swing arm. When an input is applied to the acceleration lever, the deceleration lever rotates in a direction opposite to that when an input is applied to the deceleration lever, and when an input is applied to the deceleration lever, the acceleration lever rotates in a direction opposite to that when an input is applied to the acceleration lever.

[0015] Also, in some aspects of the walking type self-propelled spreader according to the present invention, The knob rotation input conversion member further includes a biasing tool that always biases the swing arm in a direction in which the swing arm rotates the power supplied from the variable resistor element to the motor in a decreasing direction.

[0016] Also, in some aspects of the walking type self-propelled spreader according to the present invention, The acceleration lever is attached at a position offset from one end of the bar handle so that the operator can operate it by extending the index finger, The deceleration lever is attached at the position of the other end of the bar handle so that the operator can perform an operation of gripping it together with the other end of the bar handle.

[0017] Also, in some aspects of the walking type self-propelled spreader according to the present invention, It is electrically connected to a control unit, and further includes a traveling direction instruction member that is operated when the operator instructs the traveling direction and sends a traveling direction instruction signal to the control unit, The control unit further has a rotation direction control function of rotating the motor forward or backward according to the traveling direction instruction signal from the traveling direction instruction member.

[0018] Also, in some aspects of the walking type self-propelled spreader according to the present invention, It is electrically connected to a control unit, and further includes an emergency stop instruction member that is operated when the operator instructs an emergency stop and sends an emergency stop signal to the control unit, When an emergency stop signal from the emergency stop instruction member is input, the control unit further has a supply power cutoff function of cutting off the power supplied from the battery.

Advantages of the Invention

[0019] According to the present invention, it is possible to reduce the cost of the power source and provide a walk-behind, self-propelled sprayer that operates entirely by electric power. [Brief explanation of the drawing]

[0020] [Figure 1] This is an external perspective view of a walk-behind self-propelled sprayer according to an embodiment of this product. [Figure 2] Figure 1 shows the front view of the walk-behind self-propelled sprayer with its exterior panels removed. [Figure 3] Figure 1 shows the rear view of the walk-behind self-propelled sprayer with its exterior panels removed. [Figure 4] Figure 1 is an external view from above of a walk-behind self-propelled sprayer with its exterior panels removed. [Figure 5] Figure 1 is a side view of the walk-behind self-propelled sprayer with its exterior panels and left front wheel removed. [Figure 6] Figure 1 is a schematic diagram illustrating the relationships between the various functional parts of the walk-behind self-propelled sprayer. [Figure 7] Figure 1 is a partial view of the knob rotation input conversion member in the walk-behind self-propelled sprayer. [Modes for carrying out the invention]

[0021] Below, with reference to the drawings, a walking-type self-propelled sprayer 1 (hereinafter simply referred to as "self-propelled sprayer 1") as one embodiment to which the present invention is applied will be described. Note that the figures do not necessarily show all specific forms and configurations precisely.

[0022] Figure 1 is an external perspective view of the self-propelled sprayer 1 according to an embodiment. Figures 2-5 are external views of the self-propelled sprayer 1 from the front, rear, top, and side (left side), respectively, with the exterior panel P removed (and in Figure 5, with the left front wheel further removed). Figure 6 is a schematic configuration diagram showing the relationships between the various functional parts of the self-propelled sprayer 1. Figure 7 is a partial view of the knob rotation input conversion member 21 in the self-propelled sprayer 1. The self-propelled sprayer 1 will be described with reference to these figures.

[0023] The self-propelled sprayer 1 is an electric machine for evenly spreading granular materials such as fertilizers and pesticides over a relatively wide area while moving. This self-propelled sprayer 1 is a walk-type self-propelled sprayer in which the operator can move or stop by operating a power change control member while walking, gripping a handle 3 which is a movement direction control member located at the rear, and spreading granular materials while moving. In this specification, for the sake of explanation, the terms "left," "right," "front," "rear," "up," and "down" are used to indicate directions. These directions are as seen from the operator's perspective during use, and in the drawings, the left-right direction is indicated by the letter X (X1 on the left, X2 on the right), the front-back direction by the letter Y (Y1 on the front, Y2 on the rear), and the up-down direction by the letter Z (Z1 on the top, Z2 on the bottom).

[0024] As shown in Figure 1, the self-propelled sprayer 1 has a driving function unit 1A that performs driving-related functions, and a spraying function unit 1B that performs spraying-related functions and is fixed to the front upper part of the driving function unit 1A. The self-propelled sprayer 1 has exposed parts such as a handle 3 for the operator to grip, wheels 6 that make contact with the ground and rotate, a stand 7 that makes contact with the ground as needed to prevent unintentional movement when stopped, an instruction input unit 20 for the operator to input instructions, an information output unit 30 for providing necessary information to the operator (see Figures 3 and 6), and an input port 81a of the spraying device 8 that opens for loading granular material to be sprayed, but the majority of the self-propelled sprayer 1 is covered by an exterior panel P. In the exterior panel P of the self-propelled sprayer 1 of this embodiment, thin metal plates are mainly used and have the form shown in Figure 1, but the mounting position, size, shape, material, etc. of the exterior panel can be appropriately determined considering the design, protection of internal parts, storage capacity for small items, waterproofing, dustproofing, internal cooling, maintainability, etc. In the self-propelled sprayer 1, some of the switches on the instruction input unit 20 and the information output unit 30 are mounted on the control panel CP and facing the rear. The operator grasps the handle 3 from the rear of the self-propelled sprayer 1 and operates the instruction input unit 20, thereby allowing the machine to move using the driving function unit 1A while the spraying function unit 1B evenly distributes granular material over a relatively wide area.

[0025] As shown in Figures 2-5, the self-propelled sprayer 1 is equipped with a frame 2 that forms its skeleton. In addition, the self-propelled sprayer 1 is equipped with many other mechanical and electronic components that are directly or indirectly fixed to the frame 2. The main mechanical and electronic components of the self-propelled sprayer 1 include a handle 3, a battery 4, a motor 5, wheels 6, a stand 7, a spraying device 8, a transmission device 9, a control unit 10, an instruction input unit 20, and an information output unit 30.

[0026] Frame 2 is a structure assembled from metal, carbon fiber, or other strong rod-shaped or plate-shaped materials into a three-dimensional frame, and serves as a base for fixing each component.

[0027] Handle 3 is a movement direction control member that the operator grips when driving the self-propelled sprayer 1 and inputs force to determine the direction of movement. Handle 3 is attached to the frame 2 or provided as an extension of a component of the frame 2, and protrudes backward from the rear upper part of the frame 2. The shape of the handle is not particularly limited as long as it can control the direction of movement, but the handle 3 in this embodiment is a bar handle that extends in a rod shape and can be gripped at both ends by the operator with their left and right hands, respectively.

[0028] Battery 4 is a rechargeable battery capable of storing the power necessary to drive the motor 5 (described later), etc., and is selected appropriately from various types such as lead-acid batteries, nickel-metal hydride batteries, and lithium-ion batteries, taking into consideration specifications and cost. Battery 4 is periodically charged from a power supply connected to an electrically connected charging plug.

[0029] Motor 5 is, for example, a brushless DC rotary motor, having a rotating shaft 51, and is mounted on the frame 2 in a position where the axis of rotation of the rotating shaft 51 extends along the left-right direction X. Motor 5 is electrically connected to the battery 4 via the control unit 10 described later, and outputs rotational power by rotating the rotating shaft 51 with power supplied from the battery 4. At this time, power is supplied to motor 5 under the control of the control unit 10 described later, and the rotating shaft 51 rotates with the direction of rotation, rotational speed, and rotational torque adjusted.

[0030] The wheel 6 has an annular outer circumference shape and is rotatably fixed to the lower part of the frame 2 via an axle 61, with its lowest surface able to touch the ground. The wheel 6 rotates as the self-propelled sprayer 1 moves. The wheel 6 has drive wheels 62 on the left and right sides, each connected to the front via axle 61F for the front wheels that extends along a first axle L1 (see Figure 2; in Figure 2, it extends in the left-right direction X) that extends along the ground surface. The front axle 61F of these left and right drive wheels 62 is connected to a motor 5 via a transmission device 9 described later, and the rotational power of the motor 5 is transmitted to the left and right drive wheels 62, causing them to rotate in conjunction with the motor 5. The wheel 6 also has auxiliary wheels 63 that are rotatably attached to a rear axle 61R that extends perpendicular to the vertical direction Z and is fixed to a link member that rotates around the vertical direction Z near the rear center of the frame 2. The left and right drive wheels 62 and auxiliary wheels 63 provide three-point support, stabilizing the entire self-propelled sprayer 1 at their respective lowest surfaces.

[0031] Stand 7 is a support member whose one end is rotatably fixed to the lower part of the frame 2 near the center in the front-rear direction Y, and whose other end extends downward in the first configuration shown in the figure. From the first configuration, Stand 7 transforms into a second configuration in which the other end extends rearward, with one end as the center of rotation. In the first configuration, Stand 7's other end touches the ground, thereby lifting a portion of the three-point support of the wheels 6 or reducing the ground load, and providing alternative support to more firmly support the stationary self-propelled sprayer 1 so that it does not move due to its own weight on an incline. By transforming into the second configuration, Stand 7 releases its support from the self-propelled sprayer 1, making the self-propelled sprayer 1 ready to move.

[0032] The spreading device 8 includes a storage section 81 for receiving the granular material that has been introduced, a rotating body 82 rotatably positioned below the storage section 81, and a shutter 83 positioned between the storage section 81 and the rotating body 82.

[0033] The storage section 81 is a container located at the front upper part of the frame 2, with a mortar-shaped inner wall surface fixed to a base extending from the frame 2 and by stays. It has a large opening at the top, which is an input port 81a, and a smaller opening at the bottom, which is a drop-off port 81b. Granular material introduced into the storage section 81 through the input port 81a will fall out if the drop-off port 81b is not blocked.

[0034] The rotating body 82 is made of metal or resin and has a form in which fins protruding radially from the upper surface of a roughly disc-shaped plate. It rotates around a second axle L2 (see Figure 2; in Figure 2, it extends in the vertical Z direction) that intersects with a first axle L1 (see Figure 2) which is aligned with the axle 61F of the drive wheel 62. More specifically, the rotating body 82 has its rotational axis fixed to an output shaft extending in the vertical Z direction of the transmission device 9 described later. It is connected to the motor 5 via the transmission device 9, and the rotational power of the motor 5 is transmitted to it, causing it to rotate in conjunction with the motor 5. The rotating body 82 receives granular material falling from the drop-off opening 81b of the storage section 81 and rotates, thereby scattering the granular material over a predetermined area on the ground surface.

[0035] The shutter 83 is a thin, plate-like structure made of metal or resin, positioned directly below the drop-off opening 81b of the housing section 81, and is movable between a state that blocks the drop-off opening 81b and a state that exposes the drop-off opening 81b. A portion of the shutter 83 extends to the rear in the shape of a lever (see Figure 3), and the operator can move it between a closed state (blocking the drop-off opening 81b) and an open state (exposing the drop-off opening 81b) by operating the lever from the rear. By moving the shutter 83 to the closed state, the flow path between the housing section 81 and the rotating body 82 can be appropriately blocked.

[0036] In this configuration, when the self-propelled sprayer 1 is moving, that is, when the motor 5 is rotating, the rotating body 82 rotates in conjunction with the motor 5. When the operator moves the shutter 83 to the open position by operating the lever, opening the flow path between the storage section 81 and the rotating body 82, the granular material in the storage section 81 falls onto the rotating body 82, and the rotation of the rotating body 82 scatters the granular material over a wide area.

[0037] The transmission device 9 includes a transmission device main mechanism 91 that distributes and transmits the input rotational power to rotational outputs to multiple locations, and a transmission device input mechanism 92 that connects the motor 5 and the transmission device main mechanism 91 so that the rotational power of the motor 5, which is located at a distance, can be input to the transmission device main mechanism 91.

[0038] The transmission device main mechanism 91 is positioned between the left and right drive wheels 62 at the front of the frame 2 and transmits the rotational power of the motor 5 to the drive wheels 62 of the wheel 6 and the rotating body 82 of the spraying device 8 at appropriately set rotational speed and rotational torque. The transmission device main mechanism 91 has an input section 91a to which rotational force (rotational power output by the motor 5) is input, a transmission section 91b that divides and transmits the rotational force input from the input section 91a to different output positions, and a first output section 91c and a second output section 91d that output the rotational force transmitted from the transmission section 91b. The input unit 91a, the first output unit 91c, and the second output unit 91d each have a shaft structure or bearing structure to which a rotating object is connected. The input unit 91a is connected to the rotating shaft 51 of the motor 5 via a transmission device input mechanism 92 described later, the first output unit 91c is connected to the drive wheel 62 via the front wheel axle 61F, and the second output unit 91d is connected to the rotating body 82 of the spraying device 8. The input unit 91a is set so that its input shaft is parallel to the rotating shaft 51 of the motor 5. The first output unit 91c is set so that its output shaft extends on the first shaft L1 (see Figure 2), that is, it is parallel to the rotation center axis of the input unit 91a and coincides with the rotation center of the front wheel axle 61F, and rotatably fixes the front wheel axle 61F. The second output unit 91d is configured such that its output shaft extends on the second shaft L2 (see Figure 2), which intersects with the first shaft L1 (see Figure 2). That is, it intersects (orthogonal in the figure) with the rotation center axis of the input unit 91a and coincides with the rotation center of the rotating body 82 of the spraying device 8, thereby fixing the rotating body 82 of the spraying device 8 in a rotatable manner. The transmission unit 91b has a gear mechanism inside in which multiple gears such as spur gears and bevel gears are combined, taking into consideration the output shaft position, output shaft direction, and gear ratio. It converts the input to the input unit 91a into an output from the first output unit 91c with a rotational speed and rotational torque suitable for the rotation of the drive wheel 62, and an output from the second output unit 91d with a rotational speed and rotational torque suitable for the rotation of the rotating body 82.

[0039] The transmission device input mechanism 92 includes a disc-shaped main body pulley 92a fixed to the input shaft of the input section 91a of the transmission device main mechanism 91, a disc-shaped motor-side pulley 92b fixed to the rotating shaft 51 of the motor 5, and a transmission belt 92c that spans the outer surfaces of the main body pulley 92a and the motor-side pulley 92b. In the transmission device input mechanism 92, the diameters of the main body pulley 92a and the motor-side pulley 92b are set appropriately to obtain the required gear ratio, taking into account the transmission speed and transmission torque.

[0040] The transmission device 9 configured in this way does not include any mechanism to interrupt power transmission, such as a clutch mechanism, and transmits the rotation of the motor 5's rotating shaft 51 to the first output unit 91c and the second output unit 91d in conjunction with it without any free rotation. As a result, the rotation of the motor 5's rotating shaft 51 and the rotation of the drive wheels 62 and the rotating body 82 of the spraying device 8 are always synchronized in the self-propelled sprayer 1.

[0041] The control unit 10 is located at the upper rear of the frame 2. The control unit 10 includes an electronic circuit board 11 on which electronic components are mounted, and as shown in Figure 6, it is electrically connected to the battery 4, motor 5, information output unit 30 (described later), and various other electrical components (25-28, etc.) such as sensors, switches, buttons, and connectors. It controls various electronic devices, including adjusting the charge of the battery 4, the output operation of the motor 5, and information output by the information output unit 30 (described later). For example, the control unit 10 has a power supply function that supplies power from the battery 4 to electronic devices such as the motor 5 so that they can operate, or stops the power supply from the battery 4 so that they do not operate. The control unit 10 also includes a variable resistor element 12 with a protruding knob, and its resistance value can be changed by an external knob rotation input. It has a rotation speed control function that increases or decreases the power supplied from the battery 4 to the motor 5 according to the rotation position of the variable resistor element 12. The control unit 10 also has a rotation direction control function that changes the direction of the current supplied to the motor 5 to rotate the motor 5 in the forward or reverse direction. Furthermore, the control unit 10 has a power supply cutoff function that cuts off the power supplied from the battery 4 when an emergency stop signal is input. The control unit 10 also has a cruise function that supplies a constant power to the motor 5 and rotates the motor 5 at a constant speed.

[0042] The instruction input unit 20 includes an input interface operated by the operator to enable the self-propelled sprayer 1 to perform its functions, and a member that transmits instructions from the input interface to the control unit 10. The self-propelled sprayer 1 is equipped with the following as the instruction input unit 20: a knob rotation input conversion member 21 that converts external force into a knob rotation input of the variable resistor element 12 of the control unit 10; an acceleration instruction member 22 for instructing acceleration in the driving function; a deceleration instruction member 23 for instructing deceleration (including stopping) in the driving function; a start instruction member 24 for instructing start; a direction of travel instruction member 25 for instructing the direction of travel; an emergency stop instruction member 26 for instructing emergency stop; and a cruise driving instruction member 27 for instructing cruise driving.

[0043] The knob rotation input conversion member 21 is positioned at the upper rear of the frame 2 and is a member that applies rotational force to the variable resistor element 12 of the control unit 10. As shown in Figure 7, the knob rotation input conversion member 21 includes a base member 21a that serves as a base, a swingable swing arm 21b connected to the variable resistor element 12, a stopper 21c that restricts the swing arm 21b from swinging beyond a predetermined amount, and a biasing device 21d that constantly biases the swing arm 21b.

[0044] The base member 21a has a bent metal plate structure, and both ends are formed in a flange-like gate shape when viewed from the thickness direction. A variable resistor element 12 is attached to the center of the base member 21a with a knob that protrudes from the upper side through a through hole formed in the base member 21a from the lower side.

[0045] The oscillating arm 21b is fixed to the upper surface of the central part of the base member 21a. The oscillating arm 21b is made of metal or resin and has an elongated rectangular parallelepiped shape. One end is fixed to the knob of the variable resistor element 12, and it is rotatable around the rotation center of the variable resistor element 12, integrated with the knob. At its central part, the oscillating arm 21b is connected to the acceleration instruction member 22, described later, from one side in the width direction (right side in Figure 7) so that a tensile force from the acceleration instruction member 22 can be input, and at its central part, it is connected to the deceleration instruction member 23, described later, from the other side in the width direction (left side in Figure 7) so that a tensile force from the deceleration instruction member 23 can be input. As a result, the oscillating arm 21b can receive an external force (tensile force) from the acceleration instruction member 22 or the deceleration instruction member 23 and oscillate around the connection point with the variable resistor element 12.

[0046] The stopper 21c protrudes from the upper surface of the base member 21a. The stopper 21c is positioned on the other side in the width direction of the swing arm 21b (the left side in Figure 7), that is, on the side where the deceleration instruction member 23 applies tensile force to the swing arm 21b, and protrudes from the base member 21a at a height that interferes with the swing arm 21b so that the swing arm 21b does not swing beyond a predetermined amount on the side where the deceleration instruction member 23 applies tensile force.

[0047] The biasing device 21d is, for example, a tension spring, with one end attached to the other end of the oscillating arm 21b opposite to the rotation center side, and the other end attached to the upper surface of the base member 21a on the side where the deceleration instruction member 23 applies tensile force to the oscillating arm 21b (left side in Figure 7). As a result, the biasing device 21d constantly biases the oscillating arm 21b toward the side where the deceleration instruction member 23 applies tensile force. In other words, the biasing device 21d constantly biases the oscillating arm 21b in a direction that causes it to rotate in a direction that reduces the power supplied to the motor 5 by the variable resistance element 12.

[0048] The acceleration instruction member 22 is mechanically connected to the knob rotation input conversion member 21 and is operated by the operator when instructing the motor 5 to accelerate its rotation, as one of the power change operation members. When operated, the acceleration instruction member 22 applies an external force to the knob rotation input conversion member 21 so that the knob rotation input conversion member 21 rotates in a direction that increases the power supplied to the motor 5 by the variable resistor element 12. Specifically, the acceleration instruction member 22 has an acceleration lever 22a for the operator to input an acceleration instruction and an acceleration-side wire 22b that transmits the acceleration instruction input to the acceleration lever 22a to the knob rotation input conversion member 21.

[0049] The acceleration lever 22a has a gently curved shape and is attached to one end of the handle 3 (the right end in the diagram), rotating around a pivot point slightly towards the center from the base end. The acceleration lever 22a is attached to one end of the handle 3, away from the grip portion which is the part the operator holds, so that the operator can operate it by extending their index finger toward the tip beyond the pivot point.

[0050] The acceleration wire 22b includes a cylindrical guide and a stranded metal wire that passes through the guide. One end of the stranded wire is connected to the base end of the acceleration lever 22a, and the other end of the stranded wire is connected to one side (right side in the diagram) of the swing arm 21b in the width direction. As a result, the acceleration wire 22b connects the acceleration lever 22a and the swing arm 21b, and a tensile force is applied to the swing arm 21b when the operator inputs force to the acceleration lever 22a. The swing arm 21b, receiving a tensile force from the acceleration wire 22b, swings in a direction that increases the power supplied to the motor 5 by the variable resistor element 12.

[0051] The deceleration instruction member 23 is mechanically connected to the knob rotation input conversion member 21 and is operated by the operator when they instruct the motor 5 to decelerate, as another power change operation member. When operated, the deceleration instruction member 23 applies an external force to the knob rotation input conversion member 21 so that the knob rotation input conversion member 21 rotates in a direction that reduces the power supplied to the motor 5 by the variable resistor element 12. Specifically, the deceleration instruction member 23 has a deceleration lever 23a for the operator to input a deceleration instruction and a deceleration-side wire 23b that transmits the deceleration instruction input to the deceleration lever 23a to the knob rotation input conversion member 21.

[0052] The deceleration lever 23a has a gently curved shape and is attached to the other end of the handle 3 (the left end in the diagram), rotating around a pivot point that is slightly offset towards the center from the base end. The deceleration lever 23a is attached to the grip portion at the other end of the handle 3, which is the part that the operator grips, so that the operator can grip the lever from the pivot point towards the tip together with the grip portion.

[0053] The deceleration wire 23b includes a cylindrical guide and a stranded metal wire that passes through the guide. One end of the stranded wire is connected to the base end of the deceleration lever 23a, and the other end of the stranded wire is connected to the other side (left side in the diagram) in the width direction of the swing arm 21b. As a result, the deceleration wire 23b connects the deceleration lever 23a and the swing arm 21b, and a tensile force is applied to the swing arm 21b when the operator applies input to the deceleration lever 23a. The swing arm 21b, receiving a tensile force from the deceleration wire 23b, swings in a direction that reduces the power supplied to the motor 5 by the variable resistor element 12.

[0054] Here, the acceleration wire 22b and the deceleration wire 23b are connected to the swing arm 21b so as to input tensile force in opposite directions to each other. Therefore, the acceleration lever 22a and the deceleration lever 23a transmit force to each other via the acceleration wire 22b, the deceleration wire 23b, and the swing arm 21b. In other words, the acceleration lever 22a and the deceleration lever 23a are linked to each other, and when there is input to the acceleration lever 22a, the deceleration lever 23a rotates in the opposite direction to when there was input to the deceleration lever 23a, and when there is input to the deceleration lever 23a, the acceleration lever 22a rotates in the opposite direction to when there was input to the acceleration lever 22a.

[0055] In this configuration, the self-propelled sprayer 1, which includes a knob-rotation input conversion member 21, an acceleration instruction member 22, and a deceleration instruction member 23, accelerates when the operator operates the acceleration lever 22a of the acceleration instruction member 22 to give an acceleration instruction. The oscillating arm 21b of the knob-rotation input conversion member 21 rotates the variable resistor element 12 in a direction that accelerates the motor 5, thereby accelerating the motor 5. On the other hand, when the operator operates the deceleration lever 23a of the deceleration instruction member 23 to give a deceleration instruction, the oscillating arm 21b of the knob-rotation input conversion member 21 rotates the variable resistor element 12 in a direction that decelerates the motor 5, thereby decelerating or stopping the motor 5. Furthermore, in the knob rotation input conversion member 21, the biasing device 21d constantly biases the oscillating arm 21b toward the direction in which the deceleration instruction member 23 applies tensile force. Therefore, when the input to the acceleration lever 22a is released, the acceleration lever 22a is pulled by the oscillating arm 21b and rotates in the opposite direction to the direction in which it rotates during input, automatically returning to the position where there is no input. Also, in the knob rotation input conversion member 21, the biasing device 21d constantly biases the oscillating arm 21b toward the direction in which the deceleration instruction member 23 applies tensile force. Therefore, the input to the deceleration lever 23a can be performed with less force than the input to the acceleration lever 22a.

[0056] The start instruction member 24 is a key switch operated by the operator to give a start instruction to operate the motor 5, etc., and to give a stop instruction to stop the operation of the motor 5, etc., and is electrically connected to the control unit 10. When the operator inserts the key and turns it to the start position, the start instruction member 24 sends a start instruction signal to the control unit 10, and when the operator inserts the key and turns it to the stop position, it sends a stop instruction signal to the control unit 10. When the control unit 10 receives a start instruction signal from the start instruction member 24, it supplies power from the battery 4 to the electronic equipment such as the motor 5 using the aforementioned power supply function, and when the control unit 10 receives a stop instruction signal from the start instruction member 24, it stops supplying power from the battery 4 to the electronic equipment such as the motor 5 so that it does not operate.

[0057] The direction of travel indicator member 25 is a toggle switch operated by the operator to indicate whether to move the self-propelled sprayer 1 forward or backward, and is electrically connected to the control unit 10. Depending on its tilted position, the direction of travel indicator member 25 sends a forward or backward direction of travel signal to the control unit 10. When an acceleration instruction is input from the acceleration instruction member 22, the control unit 10 uses the aforementioned rotation direction control function to rotate the motor 5 forward or backward in accordance with the direction of travel signal from the direction of travel indicator member 25. As a result, the self-propelled sprayer 1 moves forward or backward according to the rotation direction of the motor 5.

[0058] The emergency stop indicator member 26 is a push-button switch that is operated by the operator when they command an emergency stop and remains pressed until released, and is electrically connected to the control unit 10. When the emergency stop indicator member 26 detects that it is pressed, it sends an emergency stop signal to the control unit 10. When the control unit 10 receives an emergency stop signal from the emergency stop indicator member 26, it cuts off the power supplied from the battery 4 using the aforementioned power supply cut-off function. As a result, the operation of electronic equipment such as the motor 5 stops, and the self-propelled sprayer 1 comes to an emergency stop.

[0059] The cruise control member 27 is a push-button switch that is operated by the operator to instruct the vehicle to cruise at a constant speed and remains pressed until released. It is electrically connected to the control unit 10. When the cruise control member 27 detects that it is pressed, it sends a cruise start signal to the control unit 10. When the control unit 10 receives the cruise start signal from the cruise control member 27, it supplies a constant power to the motor 5 through the cruise function described above. As a result, the motor 5 rotates at a constant speed, and the self-propelled sprayer 1 travels at a constant speed.

[0060] The information output unit 30 is a device appropriately selected from information output devices such as LED indicators, buzzers, speakers, and displays, and is electrically connected to the control unit 10. Based on signals sent from the control unit 10, the information output unit 30 displays information to the operator regarding the status of the self-propelled sprayer 1.

[0061] The self-propelled sprayer 1, configured in this way, can be driven by an operator who holds the handle 3 and walks, and receives instructions from the instruction input unit 20. This is achieved by activating the driving function unit 1A, in which the rotational power of the motor 5 is transmitted to the drive wheels 62 of the wheels 6 via the transmission device 9. Furthermore, the self-propelled sprayer 1 can also be driven by an operator who holds the handle 3 and walks, and receives instructions from the instruction input unit 20. This is achieved by activating the spraying function unit 1B, in which the rotational power of the motor 5 is transmitted to the rotating body 82 of the spraying device 8 via the transmission device 9. A portion of the rotational power of the motor 5 used for driving is distributed to the rotating body 82 when it is in motion, and the shutter 83 is kept open when it is in motion, allowing the granular material to be scattered over a wide area by the rotating body 82 and spread to a certain extent evenly.

[0062] (Effects / Actions) The self-propelled sprayer 1 includes a rechargeable battery 4, a motor 5 that rotates a rotating shaft 51 using power supplied from the battery 4 to output rotational power, a drive wheel 62 that rotates around a first shaft L1 parallel to the ground surface, a storage section 81 for storing granular material, and a spreading device 8 having a rotating body 82 that rotates around a second shaft L2 intersecting the first shaft L1 to spread the granular material stored in the storage section 81 over a predetermined area. The self-propelled sprayer 1 also includes a transmission device 9 that has an input section 91a connected to the rotating shaft 51 of the motor 5, a first output section 91c connected to the drive wheel 62, and a second output section 91d connected to the rotating body 82 of the spreading device 8, and distributes and transmits the rotational power of the motor 5 input from the input section 91a to the first output section 91c and the second output section 91d. With this configuration, in the self-propelled sprayer 1, the rotational power of the motor 5 is distributed and transmitted via the transmission device 9 to the drive wheels 62 and the rotating body 82 of the spraying device 8, and the electric power generated from a single motor 5 can be supplied to the driving function unit 1A and the spraying function unit 1B. Therefore, the self-propelled sprayer 1 can reduce the cost of the power source and operate entirely by electric power.

[0063] Furthermore, in the self-propelled sprayer 1, the transmission device 9 transmits the rotation of the motor 5's rotating shaft 51 to the first output unit 91c and the second output unit 91d in conjunction with it, without allowing it to spin freely. In other words, by decelerating and stopping the rotation of the motor 5, the self-propelled sprayer 1 also stops. Therefore, with the self-propelled sprayer 1, there is no need to separately install a braking device to forcibly stop the rotation of the drive wheels 62, thus reducing costs.

[0064] Furthermore, with the self-propelled sprayer 1, since the spraying device 8 has a shutter 83 that can appropriately block the flow path between the storage unit 81 and the rotating body 82, granular material can be sprayed to the area where it is needed according to the operator's request.

[0065] Furthermore, the self-propelled sprayer 1 includes a variable resistor element 12 whose resistance value can be changed by an external knob rotation input, a control unit 10 having a rotation speed control function that increases or decreases the power supplied to the motor 5 according to the rotation position of the variable resistor element 12, and a knob rotation input conversion member 21 that converts an external force into a knob rotation input to the variable resistor element 12. In addition, the self-propelled sprayer 1 is mechanically connected to the knob rotation input conversion member 21 and includes an acceleration instruction member 22 that applies an external force to the knob rotation input conversion member 21 so that when operated, the knob rotation input conversion member 21 rotates in a direction that increases the power supplied to the motor 5, and a deceleration instruction member 23 that applies an external force to the knob rotation input conversion member 21 so that the knob rotation input conversion member 21 rotates in a direction that decreases the power supplied to the motor 5. With this configuration, the self-propelled sprayer 1 can travel at a specified speed, ranging from a standstill to high speed, according to the operator's request.

[0066] Specifically, in the self-propelled sprayer 1, a rod-shaped bar handle is used as the handle 3, and the knob rotation input conversion member 21 is configured to have a swing arm 21b that swings around the connection point with the variable resistance element 12 when subjected to external force. In addition, in the self-propelled sprayer 1, the acceleration instruction member 22 is configured to have an acceleration lever 22a attached to one end of the handle 3, and an acceleration-side wire 22b that inputs a tensile force to the swing arm 21b so that it rotates in a direction that increases the power supplied to the motor 5 by the variable resistance element 12 when the operator inputs to the acceleration lever 22a. In addition, in the self-propelled sprayer 1, the deceleration instruction member 23 is configured to have a deceleration lever 23a attached to the other end of the handle 3, and a deceleration-side wire 23b that inputs a tensile force to the swing arm 21b so that it rotates in a direction that decreases the power supplied to the motor 5 by the variable resistance element 12 when the operator inputs to the deceleration lever 23a. According to the self-propelled sprayer 1, with this specific configuration as an example, it can travel at a specified speed between a standstill and high speed, according to the operator's request.

[0067] Furthermore, in the self-propelled sprayer 1, the deceleration lever 23a rotates in the opposite direction to the input when the acceleration lever 22a is pressed, and the acceleration lever 22a rotates in the opposite direction to the input when the deceleration lever 23a is pressed, thus they are linked together. Therefore, with the self-propelled sprayer 1, it is possible to accelerate quickly when an acceleration command is received, and to decelerate or stop quickly when a deceleration command is received.

[0068] Furthermore, in the self-propelled sprayer 1, the knob rotation input conversion member 21 has a biasing device 21d that constantly biases the oscillating arm 21b in a direction that reduces the power supplied to the motor 5 by the variable resistance element 12. As a result, with the self-propelled sprayer 1, if no acceleration instruction is given, a deceleration instruction is automatically given, and the operator can give a deceleration instruction with less force, thus reducing the risk of unintentional acceleration or delays in deceleration instructions, and enabling safer use.

[0069] Furthermore, in the self-propelled sprayer 1, the acceleration lever 22a is mounted off one of the grips of the handle 3 so that the operator can operate it by extending their index finger, while the deceleration lever 23a is mounted on the other grip of the handle 3 so that the operator can grip it together with the handle. In other words, in the self-propelled sprayer 1, the acceleration lever 22a is positioned in a location that requires the operator to consciously operate it, while the deceleration lever 23a is positioned in a location that the operator can operate instantly. As a result, the self-propelled sprayer 1 reduces the risk of the operator inadvertently issuing an acceleration command or mistakenly issuing an acceleration command instead of a deceleration command in an emergency, enabling safer use.

[0070] Furthermore, the self-propelled sprayer 1 is equipped with a direction of travel indicator member 25 that sends a direction of travel indicator signal to the control unit 10, and the control unit 10 has a rotation direction control function that rotates the motor 5 forward or backward in response to the direction of travel indicator signal from the direction of travel indicator member 25, so that it can move not only forward but also backward according to the operator's request.

[0071] Furthermore, the self-propelled sprayer 1 is equipped with an emergency stop instruction member 26 that sends an emergency stop signal to the control unit 10, and the control unit 10 has a power supply cutoff function that cuts off the power supplied when an emergency stop signal is input from the emergency stop instruction member 26, so that the operator can quickly stop the machine when they want to make an emergency stop.

[0072] (Other forms) Although the present invention has been described above based on the above embodiments, the present invention is not limited to the above embodiments. It can be implemented in various forms without departing from the spirit of the invention, and for example, the following modifications are also possible.

[0073] (1) The number, material, position, orientation, size, shape, function, etc. of the components described in the above embodiments are illustrative examples and can be changed within the scope that does not impair the effects of the present invention.

[0074] (2) In the embodiments described above, the wheel 6 was described as being composed of three wheels: two front drive wheels 62 and two rear auxiliary wheels 63. However, the present invention is not limited thereto. The wheel may be composed of, for example, just one drive wheel, or four wheels consisting of two front drive wheels and two rear auxiliary wheels, or the drive wheels may be positioned at the rear, or the drive wheels may be positioned at the front and rear.

[0075] (3) In the embodiments described above, the transmission device main mechanism 91 was described as distributing the rotational power input from the input unit 91a to the first output unit 91c and the second output unit 91d at a predetermined gear ratio for output, but the present invention is not limited thereto. The transmission device main mechanism may be equipped with a mechanism that can change the meshing of gears and configured to change the gear ratio.

[0076] (4) In the embodiments described above, the transmission device input mechanism 92 was described as having a structure in which a transmission belt 92c spans between a single-stage main body-side pulley 92a and a single-stage motor-side pulley 92b, and the gear ratio is fixed, but the present invention is not limited thereto. The transmission device input mechanism may be configured to change the gear ratio by having at least one of the main body-side pulley and motor-side pulley be multi-stage and by incorporating a mechanism that can change the spanning position of the transmission belt.

[0077] (5) In the embodiments described above, the transmission device input mechanism 92 was described as a so-called belt transmission structure in which a transmission belt 92c is used to connect the main body side pulley 92a and the motor side pulley 92b, but the present invention is not limited thereto. The transmission device input mechanism may also be a so-called chain transmission structure in which a main body side sprocket and a motor side sprocket are used instead of the main body side pulley and the motor side pulley, and a transmission chain is used instead of a transmission belt.

[0078] (6) In the embodiments described above, the biasing device 21d was described as a tension spring, and the deceleration instruction member 23 was attached to the side of the oscillating arm 21b that inputs the tensile force. However, the present invention is not limited thereto. For example, a compression spring may be used as the biasing device, and an acceleration instruction member may be attached to the side of the oscillating arm that inputs the tensile force, so that the oscillating arm is biased toward the side where the deceleration instruction member inputs the tensile force. Alternatively, for example, a torsion spring may be used as the biasing device, so that the oscillating arm is biased toward the side where the deceleration instruction member inputs the tensile force.

[0079] (7) In the above-described embodiment, the self-propelled sprayer 1 was described as being stopped by operating the deceleration instruction member 23 to stop the motor 5, and without a brake device to forcibly stop the rotation of the drive wheels 62. However, in addition to the stopping means by stopping the motor 5, a brake device to forcibly stop the rotation of the drive wheels may be installed to enable more sudden stops. [Explanation of Symbols]

[0080] 1...Self-propelled sprayer, 1A...Driving function unit, 1B...Spraying function unit, 2...Frame, 3...Handle, 4...Battery, 5...Motor, 6...Wheels, 7...Stand, 8...Spraying device, 9...Transmission device, 10...Control unit, 11...Electronic circuit board, 12...Variable resistor element, 20...Instruction input unit, 21...Knob rotation input conversion member, 21a...Base member, 21b...Oscillating arm, 21c...Stopper, 21d...Biasing device, 22...Acceleration instruction member, 22a...Acceleration lever, 22b...Acceleration side wire, 23...Deceleration instruction member, 23a...Deceleration lever, 23b...Deceleration side wire, 24...Starting instruction member, 25...Direction of travel instruction member 26…Emergency stop indicator member, 27…Cruise driving indicator member, 30…Information output unit, 51…Rotating shaft, 61, 61F, 61R…Axle, 62…Drive wheel, 63…Auxiliary wheel, 81…Storage unit, 81a…Input opening, 81b…Drop-out opening, 82…Rotating body, 83…Shutter, 91…Transmission device main mechanism, 91a…Input unit, 91b…Transmission unit, 91c…First output unit, 91d…Second output unit, 92…Transmission device input mechanism, 92a…Main unit side pulley, 92b…Motor side pulley, 92c…Transmission belt, CP…Operation panel, L1…First shaft, L2…Second shaft, P…Exterior panel, X…Left / right direction, Y…Front / back direction, Z…Up / down direction

Claims

1. A walk-behind self-propelled spreader that can be driven or stopped by an operator who grasps a handle, which is a movement direction control member located at the rear, and operates a power change control member while walking, and can spread granular material while driving, A rechargeable battery, A motor having a rotating shaft, electrically connected to the battery, and using power supplied from the battery to rotate the rotating shaft and output rotational power, A drive wheel that makes contact with the ground and rotates around a first axle that extends along the contact surface, A dispensing device having a containment section for receiving granular material that is introduced, and a rotating body located below the containment section and rotating around a second axis intersecting the first axis in order to disperse the granular material contained in the containment section over a predetermined area on the ground surface, A transmission device having an input unit to which the rotational power output by the motor is input, a first output unit connected to the drive wheel, and a second output unit connected to the rotating body of the spraying device, which distributes and transmits the rotational power of the motor input from the input unit to the first output unit and the second output unit, A control unit is electrically connected to the battery and the motor and includes a variable resistor element whose resistance value can be changed by an external knob rotation input, and which has a rotation speed control function that increases or decreases the power supplied from the battery to the motor according to the rotation position of the variable resistor element, A knob rotation input conversion member is mechanically connected to the variable resistor element and converts an external force into a knob rotation input to the variable resistor element of the control unit, Mechanically connected to the aforementioned knob rotation input conversion member, and operated by the operator as one of the power change operation members when instructing the motor to accelerate, an acceleration instruction member applies an external force to the knob rotation input conversion member so that the knob rotation input conversion member rotates in a direction that increases the power supplied to the motor by the variable resistor element. A deceleration instruction member is mechanically connected to the knob rotation input conversion member and, as another power change operation member, is operated by the operator when instructing the motor to decelerate, and when operated, applies an external force to the knob rotation input conversion member so that the knob rotation input conversion member rotates in a direction that reduces the power supplied to the motor by the variable resistor element. Equipped with, As the handle, a bar handle is used, which extends in a rod shape and has both ends that can be grasped by the operator with their left and right hands. The knob rotation input conversion member is connected to the variable resistor element, the acceleration instruction member, and the deceleration instruction member, and has a swinging arm that swings around the connection point with the variable resistor element in response to an external force from the acceleration instruction member or the deceleration instruction member. The acceleration instruction member includes an acceleration lever attached to one end of the bar handle and rotating around a pivot point, and an acceleration wire that connects the acceleration lever and the swing arm, and applies a tensile force to the swing arm so that it rotates in a direction that increases the power supplied to the motor by the variable resistance element in response to input from the operator to the acceleration lever. The deceleration instruction member includes a deceleration lever attached to the other end of the bar handle and rotating around a pivot point, and a deceleration wire that connects the deceleration lever and the swing arm, and applies a tensile force to the swing arm so that it rotates in a direction that reduces the power supplied to the motor by the variable resistance element in response to input from the operator to the deceleration lever. The acceleration lever and the deceleration lever are interconnected such that force is transmitted between them via the acceleration wire, the deceleration wire, and the swing arm, and when an input is made to the acceleration lever, the deceleration lever rotates in the opposite direction to the input made to the deceleration lever, and when an input is made to the deceleration lever, the acceleration lever rotates in the opposite direction to the input made to the acceleration lever. A self-propelled, walk-behind sprayer characterized by the following features.

2. In the walking-type self-propelled sprayer according to claim 1, The aforementioned transmission device is A transmission device main mechanism comprising the input unit, the first output unit, the second output unit, and a transmission unit that divides and transmits the rotational force input from the input unit to the first output unit and the second output unit located at different output positions, A transmission device input mechanism comprising a main body pulley fixed to the input section of the transmission device main mechanism, a motor pulley fixed to the rotating shaft of the motor, and a transmission belt connecting the main body pulley and the motor pulley, or, instead of these, a main body sprocket fixed to the input section of the transmission device main mechanism, a motor sprocket fixed to the rotating shaft of the motor, and a transmission chain connecting the main body sprocket and the motor sprocket, Equipped with, A walking-type self-propelled sprayer that transmits the rotation of the motor's rotating shaft from the transmission device input mechanism to the main body mechanism of the transmission device, thereby transmitting it to the first output unit and the second output unit in a synchronized manner without any free rotation.

3. In the walking-type self-propelled sprayer according to claim 2, The spraying device further includes a shutter that can appropriately block the flow path between the storage unit and the rotating body. A walk-behind, self-propelled sprayer.

4. In the walking-type self-propelled sprayer according to claim 1, The knob rotation input conversion member further includes a biasing device that constantly biases the oscillating arm in a direction that causes the oscillating arm to rotate in a direction that reduces the power supplied to the motor by the variable resistor element. A walk-behind, self-propelled sprayer.

5. In the walking-type self-propelled sprayer according to claim 1, The acceleration lever is mounted off-center from one end of the handlebar so that the operator can operate it by extending their index finger. The reduction lever is mounted at the other end of the handlebar so that the operator can grip it together with the other end of the handlebar. A walk-behind, self-propelled sprayer.

6. In the walking-type self-propelled sprayer according to claim 1, The system further comprises a direction-of-travel indicator member that is electrically connected to the control unit, is operated by the operator to indicate the direction of travel, and sends a direction-of-travel indicator signal to the control unit, The control unit further has a rotation direction control function that rotates the motor in the forward or reverse direction in response to the direction of travel signal from the direction of travel indicator member. A walk-behind, self-propelled sprayer.

7. In the walking-type self-propelled sprayer according to claim 1, The system further comprises an emergency stop instruction member that is electrically connected to the control unit, is operated when the operator gives an emergency stop instruction, and sends an emergency stop signal to the control unit, The control unit further has a power supply cutoff function that cuts off the power supplied from the battery when the emergency stop signal from the emergency stop instruction member is input. A walk-behind, self-propelled sprayer.

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