Rotary motor
A technology for rotating electrical machines and armature shafts, which is applied in the fields of noise reduction and vibration structure of bearing parts, and can solve the problems of insufficient absorption of vibration energy by vibration damping members and insufficient vibration reduction.
Inactive Publication Date: 2007-05-16
MITSUBISHI ELECTRIC CORP
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Problems solved by technology
[0006] In the conventional first rotating electrical machine, since the outer peripheral surface of the ball bearing outer ring is in contact with the inner peripheral surface of the bearing housing, the impact sound caused by the metal collision between the vibrating ball bearing and the bearing housing is generated, and the vibration is suppressed. The vibration energy absorbed by the components is not sufficient, and there is a problem that the vibration transmitted from the bearing to the housing cannot be sufficiently reduced
Method used
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Embodiment Construction
[0026] Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0027] Embodiment 1
[0028] 1 is a longitudinal sectional view showing an electric power steering motor (hereinafter referred to as a motor) according to Embodiment 1 of the present invention, and FIG. 2 is a sectional view showing a main part around a bearing in the motor according to Embodiment 1 of the present invention. 3 is a diagram illustrating the structure of components in the motor according to Embodiment 1 of the present invention, FIG. 3(a) is a sectional view, and FIG. 3(b) is a front view.
[0029] In Fig. 1, the motor 1 includes: a bottomed cylindrical yoke 2; 4-pole field permanent magnets 3 arranged at predetermined intervals in the circumferential direction and fixed on the inner peripheral wall of the yoke 2; a casing 5, It is fastened to the opening of the yoke 2 by screws 4; the shaft 10 is arranged in the yoke 2, and its two ends are rotatably su...
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Load side bearing (7) is accommodated in the load side bearing accommodate part (6) in the follow form, that is, the radial direction periphery wall surface of the load side bearing (7) is separated from the opposite radial direction inner circumference wall surface of the load side bearing accommodate part (6), and the axial direction end side of the load side bearing (7) is separated from the opposite axial direction inner wall surface of the load side bearing accommodate part (6). Besides, the first vibration control component (30) is tightly contacting the radial direction periphery wall surface of the load side bearing (7) and the radial direction inner circumference wall surface of the load side bearing accommodate part (6) and disposed between them, thereby the load side bearing (7) is kept on the load side bearing accommodate part (6). The rotary motor of the present invention can prevent the collision between the bearing and bearing accommodate part, and can decrease the vibration transferred from the bearing to the bearing accommodate part effectively.
Description
(1) Technical field [0001] The present invention relates to a rotating electric machine such as a vehicle alternator, a vehicle AC motor, and a vehicle AC motor generator, and more particularly to a structure for reducing noise and vibration of a bearing portion that pivotally supports an armature shaft. (2) Background technology [0002] In the conventional first rotating electrical machine, at least one of the contact surface of the ball bearing with the rotor shaft and the contact surface of the ball bearing with the bearing housing is arranged at a predetermined interval in the axial direction so as to cause relative sliding between them. The vibration damping member of the viscous damping force. Thus, the viscous damping force caused by relative sliding is generated between the outer peripheral surface of the outer ring of the ball bearing and the inner peripheral surface of the bearing seat, thereby suppressing the vibration and noise caused by the passage of the ball ...
Claims
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IPC IPC(8): H02K5/24
CPCH02K5/161H02K5/24H02K7/083H02K15/14
Inventor 西村俊彦上原桂一藤尾伸吾
Owner MITSUBISHI ELECTRIC CORP