Speed reduction gear
AssigneeTeijin Seiki Co., Ltd.
InventorMinoru Tanaka
Life of this patent
Estimating the term…
Abstract
A reduction gear which facilitates the mounting of a motor while securing a hollow space in a portion of the rotation center of the reduction gear, and which makes it possible to easily change the reduction ratio. A hollow space is formed in a portion of the rotation center of a reduction gear, a motor mounting member (24) for maintaining a distance between the center of rotation and a rotating shaft of the motor to a fixed distance, and a front-stage reducing portion (32) for reducing the output rotation of the motor is provided between the center of rotation and the rotating shaft of the motor.
Claims12
A reduction gear in which a hollow space is formed in a hollow shaft, the hollow shaft including a central axis, the central axis and a rotating shaft of a motor are arranged in parallel, the reduction gear comprising:
- a motor mounting member for maintaining a fixed distance between the central axis and said rotating shaft of said motor;
- a front-stage reducing portion for reducing the output rotation of said motor;
- and
- a coaxial speed reducing mechanism that is coaxial with the central axis.
A reduction gear in which a hollow space is formed in a hollow shaft, the hollow shaft including a central axis, the central axis and a rotation shaft of a motor are arranged in parallel, the reduction gear comprising:
- an eccentric member shaft that orbits about the central axis;
- an external gear rotatably mounted on the eccentric member shaft;
- an internal gear drivingly engaged with the external gear;
- a supporting unit that rotates about the central axis, the supporting unit rotatably supporting the eccentric member shaft;
- a motor mounting member maintaining a fixed distance between the central axis and said rotating shaft of said motor;
- and
- a first gear drivingly engaged with a motor shaft gear, the motor shaft gear being secured to the rotation shaft of the motor, the first gear being larger than the motor shaft gear.
A reduction gear for reducing an input rotational speed of a motor to an output rotational speed comprising:
- a motor including a rotating shaft that provides the input rotational speed;
- a hollow shaft having a central axis, the hollow shaft being fixed relative to the motor, the central axis being located in parallel to a center of rotation of the rotating shaft;
- a front-stage speed reducing mechanism that reduces the input rotational speed;
- and
- a coaxial speed reducing mechanism further reducing the rotational speed output from the front-stage speed reducing mechanism, the coaxial speed reducing mechanism outputting the output rotational speed and having a center of rotation coaxial with the central axis.
A reduction gear in which a hollow space is formed in a hollow shaft, the hollow shaft including a central axis, the central axis and a rotation shaft of a motor are arranged in parallel, the reduction gear comprising:
- a center shaft that is rotationally provided in accordance with an input from the rotation shaft of the motor;
- an external gear that orbits about the center shaft;
- an internal gear drivingly engaged with the external gear;
- a supporting unit that rotates about the central axis, the supporting unit rotatably supporting the external gear;
- a motor mounting member maintaining a fixed distance between the central axis and said rotating shaft of said motor;
- and
- a first gear drivingly engaged with a motor shaft gear, the motor shaft gear being secured to the rotation shaft of the motor, the first gear being larger than the motor shaft gear.
Dependencies are inferred from the claim text.