Abstract: A reduction gear includes an external gear, an internal gear which meshes with the external gear, a first member which synchronizes with a rotation of the external gear, a second member which synchronizes with a rotation of the internal gear, and a main bearing which is disposed between the first member and the second member, in which one of the first member and the second member is connected to a driven member and the other is fixed to an external member, and the first member, the second member, and the main bearing are formed of a material having a larger Young's modulus and larger specific gravity than those of a material constituting the external gear and the internal gear.

Abstract: An eccentric oscillation type speed reducer includes: an internal gear; an external gear which meshes with the internal gear; an eccentric body shaft which oscillates the external gear; and a carrier disposed at a side portion of the external gear in an axial direction, in which the carrier includes a first carrier which is disposed on one side in the axial direction of the external gear, and a second carrier which is disposed on the other side in the axial direction of the external gear, a driven member is connected to the first carrier, the first carrier is made of metal, and the second carrier is made of resin.

Abstract: A gear motor includes a speed reducer and a motor. The speed reducer includes an internal gear, an external gear, an input shaft having an oscillating portion oscillating the external gear, an oscillating bearing which is disposed between the external gear and the oscillating portion, and an input bearing which supports the input shaft, the input shaft includes a protrusion portion which protrudes from the motor side such that a rotor of the motor is provided in the protrusion portion, and includes a bearing disposition section in which the input bearing is disposed and a rotor disposition section in which the rotor is disposed in this order from the speed reducer side toward the motor side, an outer diameter of the rotor disposition section is equal to or less than an outer diameter of the bearing disposition section, and a rotor magnet is directly fixed to the rotor disposition section.

Abstract: The life estimation system is a life estimation system that estimates a life of the reduction gear including a reduction mechanism. The life estimation system includes a sensor that is to be mounted onto the reduction gear and detects information for identifying a stress generated in a specific part of the reduction gear, and an estimating unit that identifies the stress generated in the specific part based on detection information obtained by the sensor and estimates the life of the specific part based on the identified stress.

Abstract: A power transmission device having a motor which includes a stator around which a coil is wound, a motor frame which covers the stator, and a cover which covers an axial end portion of the motor frame. In addition, the cover is formed of a non-conductive material, and a shortest creeping distance between a coil end of the coil and the cover is shorter than 6.3 mm.

Abstract: A bending meshing type gear device includes a wave generator, an external gear which is bent and deformed by the wave generator, and internal gears which meshes with the external gear. One of the external gear and the internal gears is formed of a resin, and the other of the external gear and the internal gears is formed of a high thermal conductivity material having thermal conductivity higher than that of the resin. The gear device further include an abutment member which is connected to the internal gear and abuts the external gear, the internal gear is formed of the resin, the external gear is formed of the high thermal conductivity material, and the abutment member is formed of a high thermal conductivity material having thermal conductivity higher than that of the resin.

Abstract: A drive device configured to drive a container transporting device for transporting a container is provided. The drive device includes a motor which generates power, a brake configured to brake a movement generated by the power of the motor, and a speed reducer which has an output shaft connected to a driven portion of the container transporting device, includes a lubricant enclosed therein, and is configured to decelerate the power of the motor and transmit the decelerated power to the output shaft, in which the speed reducer, the brake, and the motor are disposed in this order from above in a vertical direction, a first seal member configured to block the lubricant is provided between the speed reducer and the brake, and the brake includes an accommodation chamber which accommodates a leaked lubricant in a case where the lubricant enclosed in the speed reducer leaks past the first seal member.

Abstract: A torque arm structure includes a first member which is fixed to the reduction gear or a member integrated with the reduction gear, and a second member which is fixed to an outer member to oppose the first member, and an elastic member configured to transmit a load by which the reduction gear is rotated around the output shaft from the first member to the second member. The elastic member is to be fitted into a gap between the first member and the second member and is detachably disposed in the gap.

Abstract: An expandable poly methyl methacrylate particle including a polymer, which is obtained by a process including polymerizing monomers including 100 parts by weight of an acrylic monomer and from 0.05 to 0.15 parts by weight of a polyfunctional monomer. The acrylic monomer includes 90% to 98% by weight of methyl methacrylate and 2% to 10% by weight of an C2-8 alkyl acrylate, relative to a total weight of the methyl methacrylate and the C2-8 alkyl acrylate.

Abstract: In a power supply circuit having input and output terminals, an error amplifier has first and second paths independent of each other to output a control voltage, a first MOS transistor is interposed between the input terminal and an intermediate node, and a step-up section steps up a voltage supplied from the intermediate node and outputs the stepped-up voltage to the output terminal. The step-up section includes a capacitor, a second MOS transistor, a third MOS transistor, and a drive circuit. The first end of the capacitor is connected to the intermediate node. The second MOS transistor is interposed between the input terminal and a second end of the capacitor. The third MOS transistor is interposed between the second end of the capacitor and a ground. The drive circuit drives the second and third MOS transistors in a complementary manner based on a clock signal.

Abstract: A gear motor is provided with a motor, a decelerator, an output shaft of the decelerator coupled to a driven shaft of a driven machine, and a torque arm for preventing rotation of the gear motor around the driven shaft. One end of the torque arm is fixed to the gear motor and the other end is fixed to an installation seat. The torque arm is provided with a damper mechanism.

Abstract: In a power supply circuit having input and output terminals, an error amplifier has first and second paths independent of each other to output a control voltage, a first MOS transistor is interposed between the input terminal and an intermediate node, and a step-up section steps up a voltage supplied from the intermediate node and outputs the stepped-up voltage to the output terminal. The step-up section includes a capacitor, a second MOS transistor, a third MOS transistor, and a drive circuit. The first end of the capacitor is connected to the intermediate node. The second MOS transistor is interposed between the input terminal and a second end of the capacitor. The third MOS transistor is interposed between the second end of the capacitor and a ground. The drive circuit drives the second and third MOS transistors in a complementary manner based on a clock signal.

Abstract: A torque arm structure includes a first member which is fixed to the reduction gear or a member integrated with the reduction gear, and a second member which is fixed to an outer member to oppose the first member, and an elastic member configured to transmit a load by which the reduction gear is rotated around the output shaft from the first member to the second member. The elastic member is to be fitted into a gap between the first member and the second member and is detachably disposed in the gap.

Abstract: There is provided a connection structure between a hollow output shaft of a speed reducer, which is provided with the hollow output shaft including a hollow portion, and a driven shaft of a counterpart machine inserted into the hollow portion of the hollow output shaft. The connection structure includes a communication passage through which the hollow portion of the hollow output shaft communicates with an internal space of the speed reducer. A space, which includes clearance between the hollow output shaft and the driven shaft, is formed as a closed space.

Abstract: A gear motor is provided with a motor, a decelerator, an output shaft of the decelerator coupled to a driven shaft of a driven machine, and a torque arm for preventing rotation of the gear motor around the driven shaft. One end of the torque arm is fixed to the gear motor and the other end is fixed to an installation seat. The torque arm is provided with a damper mechanism.

Abstract: A first shaft at which a first gear is provided is supported by an angular roller bearing in which a pair of roller rows and which is rolling elements incorporated in a back-to-back combination, and a midpoint of a projection range of a range where the first gear and a second gear mesh with each other on the first shaft is made to exist in a span of a working point of the pair of roller rows of the angular roller bearing on the pinion shaft.

Abstract: There is provided a connection structure between a hollow output shaft of a speed reducer, which is provided with the hollow output shaft including a hollow portion, and a driven shaft of a counterpart machine inserted into the hollow portion of the hollow output shaft. The connection structure includes a communication passage through which the hollow portion of the hollow output shaft communicates with an internal space of the speed reducer. A space, which includes clearance between the hollow output shaft and the driven shaft, is formed as a closed space.

Abstract: A supporting structure includes a casing, a bearing having an inner ring, an outer ring, and rolling elements disposed between the inner ring and the outer ring, and an attachment member which detachably and directly attaches a shaft to the inner ring. The outer ring is supported by the casing, and the shaft is adapted to be able to be directly fixed to or removed from the inner ring by the attachment member in a state where the bearing is assembled to the casing.

Abstract: The reduction gear includes a plurality of first and second rollers that are disposed so as to directly come into rolling contact with the outer peripheries of first and second eccentric bodies; first and second retainers that maintain gaps between the first and second rollers in the circumferential direction of the first and second eccentric bodies; and first and second guide bodies of which the movement in the axial direction is restricted and which restrict the movement of the first and second rollers in the axial direction by coming into direct contact with ends of the first and second rollers.

Abstract: The reduction gear includes a plurality of first and second rollers that are disposed so as to directly come into rolling contact with the outer peripheries of first and second eccentric bodies; first and second retainers that maintain gaps between the first and second rollers in the circumferential direction of the first and second eccentric bodies; and first and second guide bodies of which the movement in the axial direction is restricted and which restrict the movement of the first and second rollers in the axial direction by coming into direct contact with ends of the first and second rollers.