JP-7854731-B2 - Walking-type self-propelled sprayer

JP7854731B2JP 7854731 B2JP7854731 B2JP 7854731B2JP-7854731-B2

Inventors

松沢英規

Assignees

カンリウ工業株式会社

Dates

Publication Date: 20260507
Application Date: 20240820

Claims (7)

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.
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.
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.
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.
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.
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.
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 instructs an emergency stop, 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.

Description

This invention relates to a walk-behind self-propelled sprayer, and more specifically, to a walk-behind self-propelled sprayer that can be driven or stopped by an operator who grasps a handle, which serves as 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. When distributing granular materials such as fertilizers and pesticides relatively evenly, a spreader equipped with a rotating body and a power source for the rotating body is used. The power source rotates the rotating body, scattering the granular material placed in a container such as a hopper over a predetermined area. In particular, when spreading over a relatively wide area, a self-propelled spreader equipped with wheels and a power source for the wheels is used. The wheels are rotated by the power source, allowing the spreader to move under its own power while distributing the granular material. Among these, the so-called walk-behind self-propelled spreader, further equipped with a steering wheel and a power output control, is widely used. The operator grasps the steering wheel and walks while operating the power output control to move or stop the machine. Traditionally, internal combustion engines have been used as the power source for these walk-behind self-propelled spreaders, but in light of the recent trend towards decarbonization, versions with at least some of the power source replaced by electric motors have also been proposed. For example, Patent Document 1 discloses a walking-type self-propelled sprayer (chemical sprayer (1)) that uses a motor (electric motor (14)) as a power source to move and an internal combustion engine (engine (32)) as a power source to rotate a rotating body (fan) inside a fan case (31) to spray chemicals. Furthermore, for example, Non-Patent Document 1 discloses a walking-type self-propelled fertilizer spreader (electric fertilizer spreader) that uses a motor for propulsion as a power source and a motor for spreading as a power source to rotate a rotating body (impeller) to spread fertilizer. Japanese Patent Publication No. 2002-345387 Product introduction website for the electric fertilizer spreader KT-860XEL (https://lp.kaz-corp.com/kt-860xel/) This is an external perspective view of a walk-behind self-propelled sprayer according to an embodiment of this product.Figure 1 is an external view of the walk-behind self-propelled sprayer with its exterior panels removed, seen from the front.Figure 1 is an external view of the walk-behind self-propelled sprayer with its exterior panels removed, seen from the rear.Figure 1 is an external view from above of a walk-behind self-propelled sprayer with its exterior panels removed.Figure 1 is a side view of the walk-behind self-propelled sprayer with its exterior panels and left front wheel removed.Figure 1 is a schematic diagram illustrating the relationships between the various functional parts of the walk-behind self-propelled sprayer.Figure 1 is a partial view of the knob rotation input conversion member in the walk-behind self-propelled sprayer. 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. Figure 1 is an external perspective view of the self-propelled sprayer 1 according to this 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. The self-propelled sprayer 1 is an electric machine designed to evenly distribute granular materials such as fertilizers and pesticides over a relatively wide area while moving. This self-propelled sprayer 1 is a walk-behind type that allows the operator to operate the power change control member while walking, gripping the handle 3 (a movement direction control member) located at the rear, to start or stop movement, and to spread granular materials while moving. For convenience of explanation, this specification uses the terms "left," "right," "front," "rear," "up," and "down." These directions are those viewed from the operator's perspective during use, and are indicated in the drawings by the symbols X (X1 on the left, X2 on the right) for the left-right direction, Y (Y1 on the front, Y2 on the rear) for the front-back direction, and Z (Z1 on the top, Z2 on the b