Motor and manufacturing method thereof
A technology in the direction of motor and radial direction, which is applied in the direction of controlling mechanical energy, casing/housing/support, electrical components, etc., and can solve the problem of motor length becoming longer
Inactive Publication Date: 2007-10-31
SANKYO SEIKI MFG CO LTD
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- Description
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- Application Information
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[0005] However, as in the structure disclosed in Patent Document 1, the inertia ring is fixed to the base end protruding from the end opposite to the output end of the stator in the longitudinal direction of the rotating shaft, and the overall length of the motor becomes longer.
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[0069] In the above-described embodiment, the inertia ring 8 is attached to the front end side of the output shaft portion 52 in order to increase the moment of inertia, but it may also be attached to the base end side of the output shaft portion 52 . In addition, it goes without saying that the present invention can also be applied to motors other than stepping motors.
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Abstract
The invention provides a motor which can increase the inertial moment of a rotating shaft, even when there is employed a constitution for energizing the rotating shaft to a tip side at the base end side of the rotating shaft. In a stepping motor 1, the rotating shaft 51 is energized toward the tip side by a pressurization-imparting member 9 arranged at its base end side. A rotation-transmitting part 520, having a screw groove for transmitting a rotational force to the outside, is formed at an output shaft 52, protruding from the output-side end of a stator 40 at the tip side of the rotating shaft 51. An inertial ring 8 is firmly adhered to the tip side of the output shaft 52 apart from the rotation-transmitting part 520.
Description
technical field [0001] The present invention relates to a motor and a method of manufacturing the same. Background technique [0002] When the moment of inertia of the rotor in stepping motors used in digital cameras, digital video cameras, FDDs, and ODDs, etc. is small, uneven rotational speed and vibration of the rotor may occur. Therefore, in many cases, a cylindrical inertia ring is attached to the rotating shaft, and the larger the outer diameter of the inertia ring, the larger the moment of inertia obtained. [0003] However, if the inertia ring is provided at a portion located inside the stator in the longitudinal direction of the rotating shaft, the portion occupied by the inertia ring will result in an increase in the size of the motor. In addition, if the inertia ring is disposed inside the stator, it is impossible to provide an inertia ring having a size larger than the inner diameter of the stator. On the other hand, as a technique for preventing rotor resonanc...
Claims
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IPC IPC(8): H02K37/24
CPCH02K5/24H02K7/1166Y10T29/49009Y02E60/16H02K37/14H02K7/02
Inventor 小林一隆
Owner SANKYO SEIKI MFG CO LTD