Kabushiki Kaisha Yaskawa Denki

Masafumi Tamai

Ryuichirou Tominaga

Keiichi Tanaka

Yasuhiro Miyamoto

Takeo Suzuki

Yoshiaki Kubota

Satoshi Murakami

Mayumi Umetsu

Shinji Yamashita

Fumihiro Tara

Takao Fujii

Shinobu Satou

Akihiro Nomura

A small and high rigid linear motor (), wherein a tabular heat pipe () is disposed between a plurality of coil rows forming an armature coil () along the longitudinal direction of an armature () with a part of the heat absorbing part of the heat pipe () fixed to the armature coil () and the heat radiating part thereof inserted into a refrigerant passage (), a block-shaped locking member () for fixing the heat pipe () to a frame () is installed between the portion of the heat pipe () for fixing the armature coil thereto and the portion thereof inserted into the refrigerant passage (), and a hollow recessed part () forming the refrigerant passage () and allowing die insertion of the heat radiating part of the heat pipe () therein and a locking step part () allowing the locking of the frame () to the locking member () installed on the heat pipe are provided in the frame (), whereby the heat of the armature coil can be efficiently transferred to the frame, and the thrust of a rotor can be prevented from lowering according to a rise of temperature of the armature coil.

Linear motor

Stage apparatus are disclosed that provide high-accuracy positioning and movements of a stage platform, while generating reduced stray magnetic-field fluctuations and perturbations. The stage apparatus include at least one linear motor having a stator and a moving coil. Each stator includes a yoke that includes linear arrays of permanent magnets relative to which the moving coil, attached to the stage platform, moves inside a linearly extended coil gap in the yoke. A magnetic-shield plate extends around all outer surfaces and edges of the yoke as well adjacent the coil gap. The magnetic-shield plate is made of a magnetic material having high magnetic permeability.

Magnetically shielded linear motors, and stage apparatus comprising same

A reduction gears-integrated actuator provided with harmonic reduction gears a motor and a rotation position detector wherein a rotor comprises a cup-shaped rotary yolk a permanent magnet is fixed to the outer periphery of the rotary yolk a circular spline is formed in a silk-hat shape, a flange portion is fixed to one end of an actuator frame and a cylinder portion is disposed opposite to the inner periphery of the rotary yolk via a space, and a cup-shaped housing coupled with an output shaft is disposed between the output shaft and a rotating shaft and on the inner peripheral side of a flexible spline and a preloading elastic member is provided between a rotary shaft -supporting bearing and the housing, hence the axial-direction length of the actuator can be reduced, and a driving torque can be increased without compromise in reductions in size and weight, thereby providing a low-cost reduction gears-integrated actuator.

Reduction gears-integrated actuator

The invention relates to a protective device for a clean robot that includes a base in which actuators and for driving a robot arm are accommodated; a translational guide for causing the base to travel in a rectilinear direction; and a robot controller that drives and controls the drive motor A and A of the robot arm and an actuator of the translational guide ; wherein the protective device further includes acceleration sensors , which are disposed in the base and are provided in respective axes so that they can detect an impact, when the clean robot interferes with a surrounding substance, as vibration acceleration in the three-dimensional directions; an interference detecting device that outputs a pulse when the detection signals of the acceleration sensors of the respective axes exceed the threshold values that will become standards; and the first AND circuit that converts signals outputted from the interference detection means of the respective axes to interference signals, and the drive motors A and A for the robot arm and the actuator for driving the translation guide are stopped; whereby it is possible to prevent an internally incorporated speed reducer in the robot from being damaged.

Protective device for clean robot

Growing community of inventors

Kitakyushu, Japan

Masafumi Tamai