JP2023019272A5

JP2023019272A5 -

Info

Publication number: JP2023019272A5
Application number: JP2021123885A
Authority: JP
Filing date: 2021-07-29
Publication date: 2024-03-05

Description

本発明のある態様は、作業機である。この作業機は、
複数のティース部を有するステータと、前記ティース部に設けられるコイルと、前記ステータに対して回転可能なロータと、を有するモータと、
前記モータを収容するモータハウジングと、作業者が把持するハンドルハウジングと、前記ハンドルハウジングよりも下方に位置しバッテリ接続端子が設けられるバッテリ装着部と、を有するハウジングと、
前記コイルの結線方式を切り替えるための結線切替部と、
前記ハウジングに収容され、前記モータを駆動する駆動回路部と、を備え、
前記結線切替部は、上下方向において、前記駆動回路部よりも下方に配置される、
ことを特徴とする。 An embodiment of the present invention is a working machine. This work machine is
A motor having a stator having a plurality of teeth, a coil provided in the teeth, and a rotor rotatable with respect to the stator;
A housing that includes a motor housing that accommodates the motor, a handle housing that is held by an operator , and a battery mounting part that is located below the handle housing and is provided with a battery connection terminal;
a connection switching unit for switching the connection method of the coil;
a drive circuit section that is accommodated in the housing and drives the motor ;
The connection switching section is arranged below the drive circuit section in the vertical direction ;
It is characterized by

本発明の別の態様は、作業機である。この作業機は、
複数のティース部を有するステータと、前記ティース部に設けられるコイルと、前記ステータに対して回転可能なロータと、を有するモータと、
前記モータを収容するモータハウジングと、作業者が把持するハンドルハウジングと、バッテリ接続端子が設けられるバッテリ装着部と、を有するハウジングと、
前記コイルの結線方式を切り替えるための結線切替部と、
前記モータを駆動する駆動回路部と、を備え、
前記駆動回路部を搭載した第１基板と、前記結線切替部を搭載した第２基板と、が互いに略平行に並ぶよう前記ハウジングに収容される、
ことを特徴とする。 Another aspect of the invention is a working machine. This work machine is
A motor having a stator having a plurality of teeth, a coil provided in the teeth, and a rotor rotatable with respect to the stator;
A housing including a motor housing that accommodates the motor, a handle housing that is held by an operator , and a battery mounting portion that is provided with a battery connection terminal;
a connection switching unit for switching the connection method of the coil;
A drive circuit unit that drives the motor ,
A first board on which the drive circuit section is mounted and a second board on which the connection switching section is mounted are housed in the housing so as to be arranged substantially parallel to each other .
It is characterized by

本発明の別の態様は、作業機である。この作業機は、
複数のティース部を有するステータと、前記ティース部に設けられるコイルと、前記ステータに対して回転可能なロータと、を有するモータと、
前記モータの起動及び停止を指示するトリガスイッチと、
前記コイルの結線方式を切り替えるための結線切替部と、を備え、
前記コイルの結線方式は、デルタ結線とスター結線の一方から他方に切替可能に構成され、
前記トリガスイッチを操作すると、前記コイルの結線方式を前記デルタ結線として前記モータを駆動し、
前記モータに加わる負荷が第１閾値を超えると、前記デルタ結線の状態で前記モータに流れる電流を一定とする又は前記モータの負荷の上昇に応じて前記モータの回転数を低下させる第１制御を実行し、
前記第１制御において前記負荷が前記第１閾値より大きい第２閾値を超えると、前記コイルの結線方式を前記スター結線に切り替えるよう構成される。
本発明の別の態様は、作業機である。この作業機は、
複数のティース部を有するステータと、前記ティース部に設けられるコイルと、前記ステータに対して回転可能なロータと、を有するモータと、
前記モータの起動及び停止を指示するトリガスイッチと、
前記コイルの結線方式を切り替えるための結線切替部と、
前記モータを駆動する駆動回路部と、
前記駆動回路部を制御する制御部と、を備え、
前記結線切替部は、前記コイルをデルタ結線する際に使用される第１リレーユニットと、前記コイルをスター結線する際に使用される第２リレーユニットと、を有し、
前記制御部は、前記コイルを前記デルタ結線から前記スター結線に切り替える際、前記駆動回路部の駆動を停止した後に前記第１リレーユニットをオフし、その後、前記第２リレーユニットをオンして前記駆動回路部の駆動を開始する、よう構成される、
ことを特徴とする。
本発明の別の態様は、作業機である。この作業機は、
複数のティース部を有するステータと、前記ティース部に設けられるコイルと、前記ステータに対して回転可能なロータと、を有するモータと、
前記モータの起動及び停止を指示するトリガスイッチと、
前記コイルの結線方式を切り替えるための結線切替部と、
前記モータを駆動する駆動回路部と、
前記駆動回路部を制御する制御部と、を備え、
前記結線切替部は、前記コイルをデルタ結線する際に使用される第１リレーユニットと、前記コイルをスター結線する際に使用される第２リレーユニットと、を有し、
前記制御部は、前記コイルを前記スター結線から前記デルタ結線に切り替える際、前記駆動回路部の駆動を停止した後に前記第２リレーユニットをオフし、その後、前記第１リレーユニットをオンして前記駆動回路部の駆動を開始する、よう構成される、
ことを特徴とする。 Another aspect of the invention is a working machine. This work machine is
A motor having a stator having a plurality of teeth, a coil provided in the teeth, and a rotor rotatable with respect to the stator;
a trigger switch for instructing to start and stop the motor;
A connection switching unit for switching the connection method of the coil,
The coil connection method is configured to be switchable from one of delta connection and star connection to the other,
When the trigger switch is operated, the coil connection method is set to the delta connection to drive the motor;
When the load applied to the motor exceeds a first threshold value, first control is performed to keep the current flowing through the motor constant in the delta connection state or to reduce the rotation speed of the motor in accordance with an increase in the load on the motor. execute,
In the first control, when the load exceeds a second threshold value that is larger than the first threshold value, the coil connection method is switched to the star connection method.
Another aspect of the invention is a working machine. This work machine is
A motor having a stator having a plurality of teeth, a coil provided in the teeth, and a rotor rotatable with respect to the stator;
a trigger switch for instructing to start and stop the motor;
a connection switching unit for switching the connection method of the coil;
a drive circuit unit that drives the motor;
A control unit that controls the drive circuit unit,
The connection switching unit includes a first relay unit used when connecting the coils in a delta connection, and a second relay unit used when connecting the coils in a star connection,
When switching the coil from the delta connection to the star connection, the control section turns off the first relay unit after stopping driving the drive circuit section, and then turns on the second relay unit to switch the coil from the delta connection to the star connection. configured to start driving the drive circuit section;
It is characterized by
Another aspect of the invention is a working machine. This work machine is
A motor having a stator having a plurality of teeth, a coil provided in the teeth, and a rotor rotatable with respect to the stator;
a trigger switch for instructing to start and stop the motor;
a connection switching unit for switching the connection method of the coil;
a drive circuit unit that drives the motor;
A control unit that controls the drive circuit unit,
The connection switching unit includes a first relay unit used when connecting the coils in a delta connection, and a second relay unit used when connecting the coils in a star connection,
When switching the coil from the star connection to the delta connection, the control unit turns off the second relay unit after stopping driving the drive circuit unit, and then turns on the first relay unit to switch the coil from the star connection to the delta connection. configured to start driving the drive circuit section;
It is characterized by

Claims

A motor having a stator having a plurality of teeth, a coil provided in the teeth, and a rotor rotatable with respect to the stator;
A housing that includes a motor housing that accommodates the motor, a handle housing that is held by an operator , and a battery mounting part that is located below the handle housing and is provided with a battery connection terminal;
a connection switching unit for switching the connection method of the coil;
a drive circuit section that is accommodated in the housing and drives the motor ;
The connection switching section is arranged below the drive circuit section in the vertical direction ;
A work machine characterized by :

The working machine according to claim 1,
a first board located above the motor and equipped with a control unit that controls the drive circuit unit;
The connection switching unit is arranged below the first board and at approximately the same position as the motor in the vertical direction.
A work machine characterized by:

The working machine according to claim 2,
The first board is equipped with the drive circuit section that drives the motor according to the control of the control section.
A work machine characterized by:

The working machine according to claim 2,
comprising a second board on which the connection switching section is mounted;
The first board is housed in the housing so as to extend in a left-right direction substantially parallel to a motor axis of the motor, and in a front-back direction intersecting the left-right direction,
The second board is accommodated in the housing so as to extend in the front-rear direction and in a vertical direction intersecting the front-rear direction and the left-right direction.
A work machine characterized by:

The working machine according to claim 4,
The first substrate and the second substrate are arranged at a position where at least a portion thereof overlaps in the front-back direction.
A work machine characterized by:

A motor having a stator having a plurality of teeth, a coil provided in the teeth, and a rotor rotatable with respect to the stator;
A housing including a motor housing that accommodates the motor, a handle housing that is held by an operator , and a battery mounting portion that is provided with a battery connection terminal;
a connection switching unit for switching the connection method of the coil;
A drive circuit unit that drives the motor ,
A first board on which the drive circuit section is mounted and a second board on which the connection switching section is mounted are housed in the housing so as to be arranged substantially parallel to each other .
A work machine characterized by :

The working machine according to claim 6,
In the vertical direction, the battery mounting part is located below the motor housing,
The connection switching unit or the second board is accommodated in a range of the housing in which the battery mounting unit is provided in a direction that intersects with the up-down direction and in which a motor shaft of the motor extends.
A work machine characterized by:

The working machine according to claim 7,
The drive circuit unit or the first board is accommodated in a range of the housing in which the battery mounting portion is provided in a direction that intersects with the vertical direction and in which a motor shaft of the motor extends.
It features a working machine.

The working machine according to any one of claims 1 to 8 ,
a fan attached to the motor shaft of the motor;
an opening that communicates between the inside and outside of the housing ,
The connection switching section is arranged inside the housing so as to face the opening.
A work machine characterized by :

The working machine according to any one of claims 1 to 8 ,
a trigger switch for instructing starting and stopping of the motor;
The coil connection method is configured to be switchable from one of delta connection and star connection to the other,
When the trigger switch is operated, the coil connection method is set to the delta connection to drive the motor;
When the load applied to the motor exceeds a first threshold value, first control is performed to keep the current flowing through the motor constant in the delta connection state or to reduce the rotation speed of the motor in accordance with an increase in the load on the motor. execute,
In the first control, when the load exceeds a second threshold that is larger than the first threshold, the coil connection method is switched to the star connection;
A work machine characterized by :

The working machine according to claim 10 ,
In the state of the delta connection and before the first control, the motor is configured to perform constant speed control or fixed duty control to maintain a constant rotation speed of the motor;
A work machine characterized by :

The working machine according to claim 10 or 11 ,
When the load of the motor becomes equal to or less than a third threshold while driving the motor with the star connection, the coil connection method is configured to be switched to the delta connection;
A work machine characterized by :

The working machine according to claim 12 ,
the third threshold is smaller than the first threshold;
A work machine characterized by :

The working machine according to any one of claims 1 to 8 ,
The connection switching section has a relay unit,
The relay unit includes a first relay unit used when connecting the coils in a delta connection, and a second relay unit used when connecting the coils in a star connection.
A work machine characterized by :

The working machine according to claim 14,
a control section that controls the drive circuit section;
When switching the coil from the delta connection to the star connection, the control section turns off the first relay unit after stopping driving the drive circuit section, and then turns on the second relay unit to switch the coil from the delta connection to the star connection. configured to start driving the drive circuit section;
A work machine characterized by:

The working machine according to claim 14,
a control section that controls the drive circuit section;
When switching the coil from the star connection to the delta connection, the control unit turns off the second relay unit after stopping driving the drive circuit unit, and then turns on the first relay unit to switch the coil from the star connection to the delta connection. configured to start driving the drive circuit section;
A work machine characterized by:

A motor having a stator having a plurality of teeth, a coil provided in the teeth, and a rotor rotatable with respect to the stator;
a trigger switch for instructing to start and stop the motor;
A connection switching unit for switching the connection method of the coil,
The coil connection method is configured to be switchable from one of delta connection and star connection to the other,
When the trigger switch is operated, the coil connection method is set to the delta connection to drive the motor;
When the load applied to the motor exceeds a first threshold value, first control is performed to keep the current flowing through the motor constant in the delta connection state or to reduce the rotation speed of the motor in accordance with an increase in the load on the motor. execute,
The working machine is configured to switch the coil connection method to the star connection when the load exceeds a second threshold value that is larger than the first threshold value in the first control.

A motor having a stator having a plurality of teeth, a coil provided in the teeth, and a rotor rotatable with respect to the stator;
a trigger switch for instructing to start and stop the motor;
a connection switching unit for switching the connection method of the coil;
a drive circuit unit that drives the motor;
A control unit that controls the drive circuit unit,
The connection switching unit includes a first relay unit used when connecting the coils in a delta connection, and a second relay unit used when connecting the coils in a star connection,
When switching the coil from the delta connection to the star connection, the control section turns off the first relay unit after stopping driving the drive circuit section, and then turns on the second relay unit to switch the coil from the delta connection to the star connection. configured to start driving the drive circuit section;
A work machine characterized by:

A motor having a stator having a plurality of teeth, a coil provided in the teeth, and a rotor rotatable with respect to the stator;
a trigger switch for instructing to start and stop the motor;
a connection switching unit for switching the connection method of the coil;
a drive circuit unit that drives the motor;
A control unit that controls the drive circuit unit,
The connection switching unit includes a first relay unit used when connecting the coils in a delta connection, and a second relay unit used when connecting the coils in a star connection,
When switching the coil from the star connection to the delta connection, the control unit turns off the second relay unit after stopping driving the drive circuit unit, and then turns on the first relay unit to switch the coil from the star connection to the delta connection. configured to start driving the drive circuit section;
A work machine characterized by: