Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1983-02-03
1985-08-13
Budd, Mark O.
Electrical generator or motor structure
Dynamoelectric
Rotary
310209, 310 83, H02K 710
Patent
active
045352615
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to a miniature motor providing the reduction mechanism, where a miniature motor itself provides the clutch mechanism. Thereby, when the motor starts to operate by receiving a power supply, the rotating shaft of motor and the reduction mechanism are coupled via the clutch mechanism, while the supply of power stops, the clutch mechanism is isolated, decoupling between the rotating shaft of motor and reduction mechanism.
BACKGROUND OF THE INVENTION
An existing smallsize motor with reduction mechanism is described, for example, in the examined Japanese utility model application 50-9044. As shown in FIG. 9, the rotating shaft A of a motor is always coupled to the output shaft C via the reduction mechanism B. When a power is supplied to the excitation coil D, a rotating force of rotor E is transmitted to the output shaft C through the reduction mechanism B, thus driving a load. However, in the case of an existing motor, the rotating shaft A is always connected to the reduction mechanism B, and even when supply of power to the motor stops in order to release the load, the rotor E is rotated reversely only with a force of load because the rotor E of motor is coupled to the load, making it difficult to momentarily return the load to the original position. The load can be released momentarily, by providing the clutch mechanism between the motor and load and by connecting it when the motor rotates or by isolating it when the motor stops. But a particular drive source is required for coupling and isolation of clutch, resulting in cost-up. In addition, control of clutch is difficult because it must be connected or isolated by such a drive source accurately in accordance with start and stop of motor rotation.
DISCLOSURE OF THE INVENTION
This invention discloses in order to solve such problem that the clutch mechanism is isolated upon stoppage of power supply to the motor and thereby the rotating shaft of motor is disconnected from the reduction mechanism, and has such an object that this clutch mechanism is accurately driven in accordance with ON and OFF of the excitation coil of motor without using any particular driving source.
In order to attain this object, the present invention discloses the following configuration as the basic structure that the through hole allowing insertion of the rotating shaft is provided, the one end of iron core providing the excitation coil at the periphery is inserted into the central hole of the main pole and interpole, a high magnetic resistance material is provided between said main pole, interpole and iron core, moreover the absorbing disk is provided at the one end of the rotating shaft opposing to the one end of said iron core, main pole and interpole, and said rotating shaft is supported with freedom of shifting in the axial direction. At the other end of said rotating shaft, the clutch mechanism is provided. Said clutch mechanism is provided for the reduction mechanism so that the clutch is coupled when the iron core is magnetized by the excitation coil and said absorbing disk is attracted toward the iron core, thereby the rotating shaft shifts in the axial direction. Moreover, a spring means which gives a spring force in reverse direction to a magnetic attracting force to the rotating shaft is provided so that the clutch mechanism is decoupled when said excitation coil is placed into non-excited condition. In such a structure, when a power is supplied to the excitation coil and the motor starts to rotate, the absorbing disk is attracted to the iron core by a magnetic force generated by said excitation coil and at this time the rotating shaft moves in the axial direction and the clutch mechanism provided between the reduction mechanism and the shaft is coupled. On the other hand, an output of the motor is transmitted to a load via this clutch mechanism and reduction mechanism. Moreover, since the iron core is put into the non-excited condition and a magnetic absorbing force disappears, simultaneously when supply of the power to
REFERENCES:
patent: 1794618 (1931-03-01), Howe
patent: 2685043 (1954-07-01), Durant
patent: 3582697 (1971-06-01), Bochan et al.
patent: 3599022 (1971-08-01), Adair
patent: 4391356 (1983-07-01), Takemura et al.
Hirate Masatoshi
Tsukamoto Kou
Budd Mark O.
CKD Controls Limited
LandOfFree
Smallsize motor with reduction gear and clutch mechanism does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Smallsize motor with reduction gear and clutch mechanism, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Smallsize motor with reduction gear and clutch mechanism will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2320686