Abstract: A flinger reducing a noise associated with rotation of an electric motor, and an electric motor with the flinger. The flinger fixed to a rotating shaft of the electric motor includes a plurality of tapped holes provided in an end face on an electric motor, and a cut-out cutting out a part of each of the tapped holes. The tapped hole of the flinger has a depth less than a depth of a tapped hole of a flinger in the related art by a distance equivalent to a depth of the cut-out, so that a natural frequency of an air column formed in the tapped hole increases. Thus, when the flinger is used, rotation speed causing increase in noise during rotation can be shifted to higher rotation speed.

Abstract: A high-precision magnetic sensor, an electric motor having the magnetic sensor, and a method of manufacturing a machine having the magnetic sensor. A gap adjusting member is attached to a radially outer portion of teeth of a sensor gear. In a manufacturing process of a machine having the magnetic sensor, the gap adjusting member is positioned between a detecting part and the tooth of the sensor gear, and a state in which the gap adjusting member contacts both the detecting part and the tooth can be easily realized due to magnetic force applied between the sensor gear and the detecting part. Therefore, a desired gap corresponding to the thickness of the gap adjusting member can be easily obtained, without carrying out the burdensome and skillful operation for adjusting the gap as in the prior art.

Abstract: An electric motor including a structure that prevents intrusion of a foreign substance into the electric motor, and a machine tool including the electric motor. A hollow tube that fluidly connects an inner portion of a terminal box and an outer surface of a front flange is provided, and a through hole extending from the outer surface to a front space is formed. The inner portion of the terminal box and the front space communicate with each other through a flow path that is fluidly cut off from an interior space of the machine or other such machine tool and air in the terminal box automatically flows into the front space through the flow path in accordance with rotation of a rotor as described above. Also, the terminal box is fluidly connected with an amplifier provided outside of the machine through an air passage.

Abstract: A flinger reducing a noise associated with rotation of an electric motor, and an electric motor with the flinger. The flinger fixed to a rotating shaft of the electric motor includes a plurality of tapped holes provided in an end face on an electric motor, and a cut-out cutting out a part of each of the tapped holes. The tapped hole of the flinger has a depth less than a depth of a tapped hole of a flinger in the related art by a distance equivalent to a depth of the cut-out, so that a natural frequency of an air column formed in the tapped hole increases. Thus, when the flinger is used, rotation speed causing increase in noise during rotation can be shifted to higher rotation speed.

Abstract: An electric motor including a structure that prevents intrusion of a foreign substance into the electric motor, and a machine tool including the electric motor. A hollow tube that fluidly connects an inner portion of a terminal box and an outer surface of a front flange is provided, and a through hole extending from the outer surface to a front space is formed. The inner portion of the terminal box and the front space communicate with each other through a flow path that is fluidly cut off from an interior space of the machine or other such machine tool and air in the terminal box automatically flows into the front space through the flow path in accordance with rotation of a rotor as described above. Also, the terminal box is fluidly connected with an amplifier provided outside of the machine through an air passage.

Abstract: An electric motor including a labyrinth having a function for preventing foreign particles from entering an inside of the motor. A labyrinth member having a generally annular shape is fixed to a portion of a rotation shaft positioned on a front side than a front bearing with respect to an axis, by interference fit, etc., and the labyrinth member is configured to rotate integrally with the rotation shaft. The labyrinth member has at least one first opening formed on a front surface of thereof, and at least one second opening formed on an outer lateral surface thereof. The first opening and the second opening are fluidly communicated with each other within the labyrinth member.

Abstract: A high-precision magnetic sensor, an electric motor having the magnetic sensor, and a method of manufacturing a machine having the magnetic sensor. A gap adjusting member is attached to a radially outer portion of teeth of a sensor gear. In a manufacturing process of a machine having the magnetic sensor, the gap adjusting member is positioned between a detecting part and the tooth of the sensor gear, and a state in which the gap adjusting member contacts both the detecting part and the tooth can be easily realized due to magnetic force applied between the sensor gear and the detecting part. Therefore, a desired gap corresponding to the thickness of the gap adjusting member can be easily obtained, without carrying out the burdensome and skillful operation for adjusting the gap as in the prior art.

Abstract: A detection portion on a sensor holder attached to a sensor mounting base is arranged to be opposed to an outer periphery of a sensor gear at a predetermined distance. The sensor holder has a holder body which holds the detection portion and a portion to be fastened which is fastened to the sensor mounting base by screws. The portion to be fastened is provided integrally with one side of the holder body that is located to face opposite the sensor gear. At least the portion to be fastened of the sensor holder is made of a material having an elastic modulus lower than the materials of the sensor mounting base and the screws.

Abstract: An electric motor including a labyrinth having a function for preventing foreign particles from entering an inside of the motor. A labyrinth member having a generally annular shape is fixed to a portion of a rotation shaft positioned on a front side than a front bearing with respect to an axis, by interference fit, etc., and the labyrinth member is configured to rotate integrally with the rotation shaft. The labyrinth member has at least one first opening formed on a front surface of thereof, and at least one second opening formed on an outer lateral surface thereof. The first opening and the second opening are fluidly communicated with each other within the labyrinth member.

Abstract: A machine learning device which learns the cleaning frequency of a fan motor which cools an electric motor mounted in a machine includes a state observation unit which observes the state of the machine, and a learning unit which updates an action value table for cleaning the fan motor, on the basis of a state variable observed by the state observation unit. This can improve both the life of the electric motor and the operating ratio of the machine.

Abstract: A motor which prevents the generation of noise from a bearing and prevents shortening of the life of the bearing while preventing the entry of foreign matter inside of a housing. The motor 10 includes a rotor 12, a stator 16, a bearing 20, a housing 18, a bearing support surface 60 arranged to be immovable relative to the housing 18 and surrounding an outer circumferential surface 58 of the bearing 20, a first groove 62 formed at the outer circumferential surface 58 of the bearing 20 or at the bearing support surface 60, and a second groove formed at the outer circumferential surface 58 of the bearing 20 or at the bearing support surface 60 to extend in a circumferential direction so as to intersect the first groove 62.

Abstract: A machine learning device which learns the cleaning frequency of a fan motor which cools an electric motor mounted in a machine includes a state observation unit which observes the state of the machine, and a learning unit which updates an action value table for cleaning the fan motor, on the basis of a state variable observed by the state observation unit. This can improve both the life of the electric motor and the operating ratio of the machine.

Abstract: A detection portion on a sensor holder attached to a sensor mounting base is arranged to be opposed to an outer periphery of a sensor gear at a predetermined distance. The sensor holder has a holder body which holds the detection portion and a portion to be fastened which is fastened to the sensor mounting base by screws. The portion to be fastened is provided integrally with one side of the holder body that is located to face opposite the sensor gear. At least the portion to be fastened of the sensor holder is made of a material having an elastic modulus lower than the materials of the sensor mounting base and the screws.

Abstract: A motor which prevents the generation of noise from a bearing and prevents shortening of the life of the bearing while preventing the entry of foreign matter inside of a housing. The motor 10 includes a rotor 12, a stator 16, a bearing 20, a housing 18, a bearing support surface 60 arranged to be immovable relative to the housing 18 and surrounding an outer circumferential surface 58 of the bearing 20, a first groove 62 formed at the outer circumferential surface 58 of the bearing 20 or at the bearing support surface 60, and a second groove formed at the outer circumferential surface 58 of the bearing 20 or at the bearing support surface 60 to extend in a circumferential direction so as to intersect the first groove 62.

Abstract: An array of pyroelectric type heat detecting elements of different which are integrally incorporated with an optical system and which are arranged one dimensionally in a plane orthogonal to the optical axis of the optical system, and the optical system and the array of pyroelectric type heat detecting elements are rotated integrally with each other; thereby it is possible to obtain a two dimensional thermal image with a relatively simple structure.

Abstract: A thermal image detecting system includes a moving part having pyroelectric thermal detection element, a chopper for opening/closing a path of infrared rays and a chopper temperature detection element, a rotating section for rotating the moving part, a drive control section for driving the chopper and the rotating section, a band amplifier for amplifying a detection signal from the pyroelectric thermal detection element, a timing output section for outputting a signal synchronous with an opening/closing operation of the chopper, a peak detection section for successively holding the maximum value and the minimum value of a signal from the band amplifier, and an operational processing section for performing operational processing on a thermal image signal on the basis of a difference between the maximum value and the minimum value or a difference between a reference signal from the band amplifier in a closed state of the chopper and the maximum value, or the minimum value and the temperature of the chopper.