Mitsuba Corporation

Yukiyoshi Iso

Naoki Kojima

Masaaki Kimura

Takao Ochiai

Hirokazu Shoda

Osamu Nakamura

Hiroshi Sakai

Takeshi Kanai

Tomoya Nishikawa

Masayuki Ota

Masafumi Takimoto

Shin Akimoto

A gear side feeding terminal (U,V,W) connected to a motor side feeding terminal (U,V,W) provided to the end portion of a stator () in the axial direction of the stator () from the axial direction of a rotor () is provided on a control board () for controlling the rotor (), housed in a gear case () so as to be stacked on a speed reduction mechanism (SD) from the direction crossing the axial direction of the rotor (). In this manner, the wiper motor is composed of a brushless wiper motor (), and it is unnecessary to provide the gear side feeding terminal (U,V,W) so as to avoid the control board (). Accordingly, it is possible to prevent electric noises, and provide a wiper motor reduced in size and weight, and since it is unnecessary to form a clearance in the control board (), it is possible to provide a wiper motor further improved in degree of freedom for designing the control board ().

Brushless wiper motor and method for assembling the same

In a brushless wiper motor, a rotor () is rotatably provided inside a stator () provided with a coil (), one end side of a rotation shaft () in the axial direction is fixed to the axial center of the rotor (), a worm () is provided on the other end side of the rotation shaft () in the axial direction, the first and second bearings () are respectively provided on one end side of the rotation shaft () in the axial direction and the other end side of the rotation shaft () in the axial direction than the worm () of the rotation shaft (), the rotation shaft () is rotatably supported by only the first and second bearings (), and with the position of the first bearing () being defined as a reference position, a length thereof in the axial direction to the second bearing () is longer than a length thereof in the axial direction to the rotor (). Since a commutator and other parts are not provided on a free end side of the rotation shaft (), it is possible to provide a brushless wiper motor reduced in length of the rotation shaft (), and reduced in inertial mass of the free end side of the rotation shaft ().

Brushless wiper motor

In a driving apparatus () in which a position of a rotating shaft () of an electric motor () in a direction of an axis (B) is determined, the driving apparatus () has: a stopper () which determines a position of the rotating shaft () in the direction of the axis (B), and a terminal holder () which holds a first terminal for supplying an electric current to the electric motor (), wherein a layout region of the stopper () in the direction of the axis (B) and a layout region of the terminal holder () in the direction of the axis (B) are overlapped with each other.

Driving apparatus

In a driving apparatus having a casingA in which an electric motoris housed, the driving apparatus further has: a rotating shaftthrough which a torque of the electric motoris transmitted, the rotating shaftbeing formed with a worm; a worm wheelwhich is disposed in the casingA, the worm wheelhaving a worm gearwhich is engaged with the worm; a terminal holderwhich is disposed in the casingA, and which supports a terminal carrying a current to be supplied to the electric motor; and an air holewhich extends so as to penetrate the casingA, an inside of the casingA and an outside of the casingA communicating with each other through the air hole, wherein in a plan view perpendicular to an axis Cserving as a rotation center of the worm wheel, the air holeis disposed in an area defined by projection of an area occupied by the terminal holderin a direction along an axis B, and between the electric motor and an engaging part Eof the wormwith the worm gear

In a brushless wiper motor, first and second pressing claws (and) are formed on an outer periphery (OP) of steel sheets () forming a stator core (), and press-fitted to an inner periphery (IP) of the motor housing unit () so that the stator core () is fixed to the motor housing unit (), base end portions of the first and second pressing claws (and) are respectively connected to first and second walls formed on the outer periphery (OP) of the steel sheets (), and tip end portions of the first and second pressing claws (and) each serves as a free end, and are directed in a circumferential direction of the stator core ().

A driving apparatus having an electric motor configured to rotate a rotating shaft () by a supplied current, the driving apparatus comprising: a control board () which is positioned relative to the electric motor, and on which electronic components for controlling the electric motor is mounted; a plurality of first terminals () which are mounted on the control board (), the first terminals () carrying a current; a plurality of second terminals () connected to the respective first terminals (), the second terminals () carrying a current, the second terminals () being disposed outside the rotating shaft () in a radial direction of the rotating shaft () and arranged along a circumferential direction of the rotating shaft ().

The swing member () to be subjected to swinging drive is integrally provided to the output shaft () outside the speed reducer case (), the speed reducer case () is provided with a pair of swing regulating portions () which prevents the swing member () from being moved beyond the wiping-allowable limit angle (b&#xb0;) by contacting the swing member (). As a result, the swing member () and the swing regulating portions () can collectively form the regulating member (). As a result, essential components (such as fixing plate) can be omitted from the conventional wiper apparatus. Therefore, the wiper apparatus can be improved in assembly workability, size and weight by reducing the number of components thereof, and provided with a regulating member () which prevents the wiper member being moved beyond the wiping-allowable limit angle (b&#xb0;).

Wiper apparatus

An object of the invention is to improve a layout property of members arranged on the brush holder. Power feeding terminals are formed in a flat shape extending in an axial direction of an armature shaft, and the power feeding terminal is arranged side by side in a width direction with respect to the power feeding terminal in one end portion of a brush holder. A condenser is provided between the power feeding terminals and the armature shaft. Further, a power supply circuit for electrically connecting the power feeding terminals to a leaf spring brush is electrically connected to a motor housing via a grounding stay, and a choke coil for reducing a noise generated in the power supply circuit is arranged so as to be lapped over a screw member fixing the leaf spring brush to the brush holder in the axial direction of the armature shaft.

Electric motor

Improving layout characteristics of a detecting switch with respect to a control board to miniaturize an electric actuator. Switch-side connecting terminals are provided in a limit switch constituting a panel-position detecting mechanism, which is fixed to an outer face of a motor cover. Meanwhile, board-side connecting terminals having connecting portions to be terminal-connected to the switch-side connecting terminals are fixed to the control board, and the control board is disposed inside the motor cover and is fixed in a board case. By moving the limit switch toward the connecting portions, the switch-side connecting terminals and the connecting portions are connected, whereby the limit switch and the control board are connected.

Growing community of inventors

Gunma, Japan

Yukiyoshi Iso