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US 8,234,745 B2Granted
Motor device and wiper apparatus
AssigneeAsmo Co., Ltd.
InventorsHiroshi Matsumoto, Masahiko Yamanishi
Life of this patent
Estimating the term…
Abstract
A sectoral reduction gear is arranged between a motor portion and a link mechanism. The sectoral reduction gear rotates in a reciprocating manner in a predetermined angle range on the basis of a forward rotation and a reverse rotation of the motor portion. An outer periphery of the sectoral reduction gear defines an imaginary circle. An inner region of the imaginary circle has an operating range in which the sectoral reduction gear, which rotates in a reciprocating manner, passes, and a non-operating range, in which the sectoral reduction gear does not pass. As seen from an axial direction of an output shaft, a part or the whole of the output shaft is arranged in the non-operating range.
Claims18
A motor device comprising:
- a motor portion having
- a rotary shaft and
- a worm gear integrally formed with said rotary shaft,
- said motor portion being capable of rotating the rotary shaft forward and in reverse;
- a link mechanism drivingly coupled to the motor portion, the link mechanism being integrally assembled in the motor portion;
- a sectoral reduction gear arranged between-the motor portion and the link mechanism,
- the sectoral reduction gear rotating in a reciprocating manner in a predetermined angle range on the basis of the forward rotation and the reverse rotation of the motor portion,
- the sectoral shape of the sectoral reduction gear having a size corresponding to the reciprocating rotation of the sectoral reduction gear,
- the sectoral reduction gear having
- an outer circumferential surface,
- an outer periphery, and
- gear teeth formed on the outer circumferential surface for engaging the worm gear,
- the outer periphery being part of a representative circle, and an inner region of the representative circle having an operating range, in which the sectoral reduction gear rotating in a reciprocating manner in the predetermined angle range passes, and a non-operating range, in which the sectoral reduction gear does not pass;
- and
- an output shaft that is rotated in a reciprocating manner by the link mechanism, a part of or the whole of the output shaft being arranged in the non-operating range as seen from an axial direction of the output shaft.
12 more elements
A motor device comprising:
- a motor portion assembled with a motor housing and being capable of rotating forward and in reverse, said motor housing having a link accommodating portion integrally formed therein;
- an output shaft placed in said link accommodating portion;
- and
- a link mechanism drivingly coupled to the motor portion, the link mechanism being accommodated in the link
- accommodating portion so that the link mechanism is integrally assembled in the motor portion,
- the link mechanism rotating the output shaft in a reciprocating manner between a first reverse position and a second reverse position, the first reverse position serving as a stop position of the output shaft,
- wherein the link mechanism comprises:
- a first lever that is swung in a reciprocating manner by the motor portion;
- a third lever to which the output shaft is fixed so as to be integrally rotatable therewith;
- and
- a second lever coupling the first lever to the third lever in such a manner as to make the output shaft rotatable,
- wherein the link mechanism sets a rotation angle range of the output shaft to be less than one half rotation,
- wherein
- the output shaft is positioned at a first position when the first lever and the second lever are aligned along a first straight line,
- the output shaft would be positioned at a second position if the first lever and the second lever were aligned on a third straight line, and
- the output shaft would be positioned at a third position if the second lever and the third lever were aligned along a fourth straight line, and
- wherein the first reverse position is set to the first position, and the second reverse position is set to a position between the first position and the third position, and immediately adjacent to the third position.
14 more elements
A motor device comprising:
- a motor portion assembled with a motor housing and being capable of rotating forward and in reverse, said motor housing having a link accommodating portion integrally formed therein;
- an output shaft;
- and a link mechanism drivingly coupled to the motor portion, the link mechanism being accommodated in the link accommodating portion so that the link mechanism is integrally assembled in the motor portion, the link mechanism rotating the output shaft in a reciprocating manner between a first reverse position and a second reverse position, the first reverse position serving as a stop position of the output shaft, wherein the link mechanism comprises:
- a first lever that is swung in a reciprocating manner by the motor portion;
- a third lever to which the output shaft is fixed so as to be integrally rotatable therewith;
- and a second lever coupling the first lever to the third lever in such a manner as to make the output shaft rotatable, wherein the link mechanism sets a rotation angle range of the output shaft to be less than one half rotation, wherein the output shaft is positioned at a first position when the first lever and the second lever are aligned along a first straight line, the output shaft would be positioned at a second position if the first lever and the second lever were aligned on a third straight line, and the output shaft would be positioned at a third position if the second lever and the third lever were aligned along a fourth straight line, and wherein the first reverse position is set to the first position, and the second reverse position is set to a position between the first position and the third position, and immediately adjacent to the third position, wherein the motor portion comprises a rotary shaft provided with a worm gear, the rotary shaft being rotated between an end position of a forward rotation and an end position of a reverse rotation of the motor portion, and wherein the motor device further comprises a sectoral reduction gear engaging with the worm gear, the sectoral reduction gear transmitting a driving force of the motor portion to the link mechanism, and having a sectoral shape sized to correspond to the end positions of the forward rotation and the reverse rotation of the motor portion.
3 more elements
Dependencies are inferred from the claim text.