Abstract: Provided are a motor and a bearing outer ring fixing unit that can prevent a bearing outer ring from shifting in the axial direction. The motor of an embodiment is provided with: a first member attached to a housing and supporting one end surface side of the outer ring of a bearing; and a second member attached to the first member and supporting the other end surface side of the outer ring of the bearing. The outer ring is fastened by the first member and the second member.

Abstract: A bearing life prediction device includes a pressure measuring unit that measures the pressure applied to a front bearing, a coolant pressure measuring unit that measures the pressure of a coolant liquid, a detecting unit that measures or predicts the rotation number and the temperature, a storage unit that stores model information and motor specification information in correlation, a specifying unit that inputs or selects the model information, and a bearing life prediction unit that predicts the life of bearings on the basis of the motor specification information including specification information of the bearings stored in the storage unit, and each information on the pressure of the coolant liquid, the pressure applied to the front bearing, the rotation number of the motor, and the temperature of the bearings.

Abstract: A motor failure diagnosis system includes: a motor having a rotating shaft and a bearing that receives the rotating shaft; a vibration sensor capable of detecting a vibration of the motor when the rotating shaft is a rotation state; the date information output unit capable of outputting date information; a vibration information storage unit that stores the vibration information detected by the vibration sensor and the date information output by the date information output unit in correlation; and a failure date identifying unit that identifies the date on which a failure occurred in the bearing of the motor on the basis of the vibration information and the date information stored in the vibration information storage unit.

Abstract: A preload judgement device includes: a preload obtaining unit configured to obtain a preload that acts on a bearing that pivotally supports a drive shaft of a motor; and a notification unit configured to give notification that the preload is not appropriate when the obtained preload is not in a set range.

Abstract: A motor capable of replacing a lubricant more easily is provided. A motor includes: a rotor supported by an output shaft-side bearing and an anti-output shaft-side bearing; a front housing that supports the output shaft-side bearing; a rear housing that supports the anti-output shaft-side bearing; a stator having both ends attached to the front housing and the rear housing, the stator surrounding the rotor; and a pair of pipelines which has an opening formed in a surface of the rotor close to the rear housing and which is provided inside the rotor, the pipelines communicating with at least one of the output shaft-side bearing and the anti-output shaft-side bearing and capable of circulating a lubricating liquid.

Abstract: A machine learning apparatus includes a state observing unit and a learning unit. The state observation unit observes, during repeated processing operations, a state variable including a processing downtime and at least one of an actual one-cycle processing time of a processing machine and the temperature of a motor. The learning unit learns a value for selecting, based on the state variable and an overheat alarm level, the shortest processing downtime, which satisfies the fact that the temperature of the motor does not exceed the overheat alarm level when the repeated processing operations are performed.

Abstract: The bearing life prediction device includes a pressure measuring unit that measures the pressure applied to a front bearing, a coolant pressure measuring unit that measures the pressure of a coolant liquid, a detecting unit that measures or predicts the rotation number and the temperature, a storage unit that stores model information and motor specification information in correlation, a specifying unit that inputs or selects the model information, and a bearing life prediction unit that predicts the life of the bearings on the basis of the motor specification information including the specification information of the bearings stored in the storage unit in correlation with the model information input or selected by the specifying unit, the pressure information of the coolant liquid, the pressure information applied to the front bearing, the rotation number information of the motor, and the temperature information of the bearings.

Abstract: A motor vibration cause determination system includes: a vibration sensor unit capable of detecting vibration of the motor in a driving state, the vibration sensor unit detecting a first vibration which is vibration of the motor in a stand-alone state before shipping, a second vibration which is vibration of the motor in a stand-alone state and in a non-connection state in which the motor is not connected to the main shaft after shipping, and a third vibration which is vibration of the motor in the connection state; a vibration information storage unit that stores information on the vibration of the motor detected by the vibration sensor unit, the information including information on the first, second, and third vibrations; and a vibration cause determination unit that determines the cause of vibration occurring in the connection state on the basis of the vibration information stored in the vibration information storage unit.

Abstract: A motor failure diagnosis system includes: a motor having a rotating shaft and a bearing that receives the rotating shaft; a vibration sensor capable of detecting a vibration of the motor when the rotating shaft is a rotation state; the date information output unit capable of outputting date information; a vibration information storage unit that stores the vibration information detected by the vibration sensor and the date information output by the date information output unit in correlation; and a failure date identifying unit that identifies the date on which a failure occurred in the bearing of the motor on the basis of the vibration information and the date information stored in the vibration information storage unit.

Abstract: A motor vibration cause determination system includes: a vibration sensor unit capable of detecting vibration of the motor in a driving state, the vibration sensor unit detecting a first vibration which is vibration of the motor in a stand-alone state before shipping, a second vibration which is vibration of the motor in a stand-alone state and in a non-connection state in which the motor is not connected to the main shaft after shipping, and a third vibration which is vibration of the motor in the connection state; a vibration information storage unit that stores information on the vibration of the motor detected by the vibration sensor unit, the information including information on the first, second, and third vibrations; and a vibration cause determination unit that determines the cause of vibration occurring in the connection state on the basis of the vibration information stored in the vibration information storage unit.

Abstract: A motor capable of replacing a lubricant more easily is provided. A motor includes: a rotor supported by an output shaft-side bearing and an anti-output shaft-side bearing; a front housing that supports the output shaft-side bearing; a rear housing that supports the anti-output shaft-side bearing; a stator having both ends attached to the front housing and the rear housing, the stator surrounding the rotor; and a pair of pipelines which has an opening formed in a surface of the rotor close to the rear housing and which is provided inside the rotor, the pipelines communicating with at least one of the output shaft-side bearing and the anti-output shaft-side bearing and capable of circulating a lubricating liquid.

Abstract: A motor control device according to this invention includes a correction unit which calculates a correction coefficient for correcting the temperature of windings, based on the result of a comparison between a winding estimated temperature rise profile representing the temperature of the windings estimated by a winding temperature estimation unit and a winding actual temperature rise profile representing the temperature of the windings measured by a temperature sensor, when a motor as attached to a machine is rotated at a predetermined rotational speed, to match the winding estimated temperature rise profile with the winding actual temperature rise profile, and corrects a temperature rise estimation arithmetic expression using the correction coefficient.

Abstract: An electric motor comprises a tubular housing for holding a rotor core, a shaft which has a first end part projecting outward from the housing and a second end part located inside the housing, and a bearing located between the first end part and the rotor core for rotatably supporting the shaft inside the housing. The housing is provided with an air feed hole to which an air feed source can be connected for feeding air to an inside space where the second end part is located, and the shaft is provided with a bore which extends from an air inflow port formed on the second end part to an air outflow port formed on a circumferential surface of a partial region of the shaft which is located between the first end part and the bearing.

Abstract: A machine learning apparatus includes a state observing unit and a learning unit. The state observation unit observes, during repeated processing operations, a state variable including a processing downtime and at least one of an actual one-cycle processing time of a processing machine and the temperature of a motor. The learning unit learns a value for selecting, based on the state variable and an overheat alarm level, the shortest processing downtime, which satisfies the fact that the temperature of the motor does not exceed the overheat alarm level when the repeated processing operations are performed.

Abstract: A motor control device according to this invention includes a correction unit which calculates a correction coefficient for correcting the temperature of windings, based on the result of a comparison between a winding estimated temperature rise profile representing the temperature of the windings estimated by a winding temperature estimation unit and a winding actual temperature rise profile representing the temperature of the windings measured by a temperature sensor, when a motor as attached to a machine is rotated at a predetermined rotational speed, to match the winding estimated temperature rise profile with the winding actual temperature rise profile, and corrects a temperature rise estimation arithmetic expression using the correction coefficient.

Abstract: An electric motor comprises a tubular housing for holding a rotor core, a shaft which has a first end part projecting outward from the housing and a second end part located inside the housing, and a bearing located between the first end part and the rotor core for rotatably supporting the shaft inside the housing. The housing is provided with an air feed hole to which an air feed source can be connected for feeding air to an inside space where the second end part is located, and the shaft is provided with a bore which extends from an air inflow port formed on the second end part to an air outflow port formed on a circumferential surface of a partial region of the shaft which is located between the first end part and the bearing.

Abstract: A rolling bearing system provided with an inner ring including a first raceway surface, an outer ring including a second raceway surface, a rolling element retained between the inner ring and the outer ring and capable of rolling along the first raceway surface and the second raceway surface, and a lubricant storage section incorporated in a bearing structure. The lubricant storage section includes a grease tank arranged between the inner and outer rings for storing a grease, and a grease pressing mechanism for pushing the grease stored in the grease tank out of the grease tank to supply the grease to the rolling element and the first and second raceway surfaces. The inner ring includes a first extending surface adjoining the first raceway surface, and the outer ring includes a second extending surface adjoining the second raceway surface and facing the first extending surface. The grease tank is housed in an annular space defined between the first and second extending surfaces.

Abstract: An air-cooled motor has a motor body in which a through hole is formed in a rotary shaft, a supply section for supplying a fluid to the through hole, a cylindrical member surrounding the supply section, and a cooling fan provided on the side opposite the motor body with respect to the cylindrical member. A window is provided in the cylindrical member or at least a part of the cylindrical member is made of a transparent material so that the supply section can be visually observed.

Abstract: A rolling bearing system provided with an inner ring including a first raceway surface, an outer ring including a second raceway surface, a rolling element retained between the inner ring and the outer ring and capable of rolling along the first raceway surface and the second raceway surface, and a lubricant storage section incorporated in a bearing structure. The lubricant storage section includes a grease tank arranged between the inner and outer rings for storing a grease, and a grease pressing mechanism for pushing the grease stored in the grease tank out of the grease tank to supply the grease to the rolling element and the first and second raceway surfaces. The inner ring includes a first extending surface adjoining the first raceway surface, and the outer ring includes a second extending surface adjoining the second raceway surface and facing the first extending surface. The grease tank is housed in an annular space defined between the first and second extending surfaces.

Abstract: An air-cooled motor has a motor body in which a through hole is formed in a rotary shaft, a supply section for supplying a fluid to the through hole, a cylindrical member surrounding the supply section, and a cooling fan provided on the side opposite the motor body with respect to the cylindrical member. A window is provided in the cylindrical member or at least a part of the cylindrical member is made of a transparent material so that the supply section can be visually observed.