Motor having control circuit board for controlling its rotation

A motor comprising:

• a motor unit that has:
• a yoke housing, which includes an opening;
• a rotatable shaft, received in the yoke housing;
• and
• a cover installed in proximity to the opening of the yoke housing;
• and
• a speed reducing unit connected to the motor unit, the speed reducing unit including:
• a speed reducing mechanism for reducing rotational speed of the rotatable shaft;
• a generally planar control circuit board for controlling rotation of the motor unit;
• and
• a gear housing that includes a circuit board receiving portion and an opening, wherein:
• the cover is positioned between the opening of the yoke housing and the opening of the gear housing to cover both the opening of the yoke housing and the opening of the gear housing;
• the opening of the gear housing faces the motor unit in an axial direction of the rotatable shaft and is communicated with the circuit board receiving portion;
• the control circuit board is inserted in the circuit board receiving portion of the gear housing through the opening of the gear housing in an axial direction of the rotatable shaft in such a manner that the control circuit board is clamped between the cover and the circuit board receiving portion such that a plane of the control circuit board is generally parallel to an axis of the rotatable shaft when the motor unit and the speed reducing unit are assembled and connected together;
• the cover includes a plurality of motor-side connecting terminals for receiving electrical power supply to the motor unit;
• and
• the control circuit board includes a plurality of board-side connecting terminals electrically connected to the motor-side connecting terminals.

A motor comprising:

• a motor unit that has:
• a yoke housing that includes an opening;
• a rotatable shaft received in the yoke housing;
• and
• a cover installed to the opening of the yoke housing;
• and
• a speed reducing unit connected to the motor unit, the speed reducing unit including:
• a speed reducing mechanism for reducing rotational speed of the rotatable shaft, wherein the speed reducing mechanism includes a worm shaft arranged coaxially with the rotatable shaft and provided separately from the rotatable shaft;
• a generally planar control circuit board for controlling rotation of the motor unit;
• and
• a gear housing that includes a circuit board receiving portion and an opening, wherein:
• the cover is positioned between the opening of the yoke housing and the opening of the gear housing to cover both the opening of the yoke housing and the opening of the gear housing;
• the opening of the gear housing faces the motor unit in an axial direction of the rotatable shaft;
• the rotatable shaft and the worm shaft are arranged such that the rotatable shaft and the worm shaft are connected together in an integrally rotatable manner when the motor unit and the speed reducing unit are assembled and connected together;
• and
• the control circuit board is inserted in the circuit board receiving portion of the gear housing through the opening of the gear housing in an axial direction of the rotatable shaft in such a manner that the control circuit board is arranged between the circuit board receiving portion and the cover such that a plane of the control circuit board is generally parallel to an axis of the rotatable shaft when the motor unit and the speed reducing unit are assembled and connected together.

A motor comprising:

• a motor unit that has a rotatable shaft;
• and
• a speed reducing unit connected to the motor unit, the speed reducing unit including:
• a speed reducing mechanism for reducing rotational speed of the rotatable shaft;
• a control circuit board for controlling rotation of the motor unit;
• and
• a gear housing that includes a circuit board receiving portion and an opening, wherein:
• the opening of the gear housing faces the motor unit and is communicated with the circuit board receiving portion;
• the control circuit board is inserted in the circuit board receiving portion of the gear housing through the opening of the gear housing in an axial direction of the rotatable shaft in such a manner that the control circuit board is clamped between the motor unit and the speed reducing unit when the motor unit and the speed reducing unit are assembled and connected together;
• the speed reducing mechanism of the speed reducing unit includes a worm shaft arranged coaxially with the rotatable shaft;
• the rotatable shaft and the worm shaft are arranged such that the rotatable shaft and the worm shaft are connected together when the motor unit and the speed reducing unit are assembled and connected together;
• and
• the rotatable shaft and the worm shaft are connected together through a clutch, which transmits rotational force of the rotatable shaft to the worm shaft and prevents transmission of rotational force of the worm shaft to the rotatable shaft.

A motor comprising:

• a motor unit that has:
• a yoke housing, which includes an opening;
• a rotatable shaft, which is received in the yoke housing;
• and
• a cover, which is installed to the opening of the yoke housing;
• and
• a speed reducing unit connected to the motor unit, the speed reducing unit including:
• a speed reducing mechanism for reducing rotational speed of the rotatable shaft;
• a generally planar control circuit board for controlling rotation of the motor unit;
• and
• a gear housing that includes a circuit board receiving portion and an opening, wherein:
• the cover is positioned between the opening of the yoke housing and the opening of the gear housing to cover both the opening of the yoke housing and the opening of the gear housing;
• the opening of the gear housing faces the motor unit in an axial direction of the rotatable shaft;
• the circuit board receiving portion has at least one guide groove, which extends parallel to an axis of the rotatable shaft;
• and
• the control circuit board is inserted in the circuit board receiving portion of the gear housing through the opening of the gear housing in an axial direction of the rotatable shaft such that the control circuit board is guided by the at least one guide groove when the motor unit and the speed reducing unit are assembled and connected together.

A motor comprising:

• a motor unit that has:
• a yoke housing, which includes an opening;
• a rotatable shaft, which is received in the yoke housing;
• and
• a cover, which is installed to the opening of the yoke housing and includes a circuit board holding portion, wherein the circuit board holding portion includes at least one guide groove that extends parallel to an axis of the rotatable shaft;
• and
• a speed reducing unit connected to the motor unit, the speed reducing unit including:
• a speed reducing mechanism for reducing rotational speed of the rotatable shaft;
• a generally planar control circuit board for controlling rotation of the motor unit;
• and
• a gear housing that has a circuit board receiving portion and an opening, wherein:
• the cover is positioned between the opening of the yoke housing and the opening of the gear housing to cover both the opening of the yoke housing and the opening of the gear housing;
• the opening of the gear housing faces the motor unit in the axial direction of the rotatable shaft;
• and
• the control circuit board is inserted in the circuit board holding portion of the cover and is also inserted in the circuit board receiving portion of the gear housing when the motor unit and the speed reducing unit are assembled and connected together, wherein the control circuit board is inserted in the circuit board holding portion of the cover such that the control circuit board is guided by the at least one guide groove of the circuit board holding portion of the cover.