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US 2015/0020761 A1Published application
Engine startup device
AssigneeMitsubishi Electric Corporation
InventorsMasami Abe, Koichiro Kamei, Kazuhiro Odahara
Life of this patent
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Abstract
An engine startup device is provided having a helical-spline-engaging part where an output shaft (5) and a moving body (3) are coupled with each other, wherein a notch (37b, 38b) is formed on a power-transmitting-side tooth surface (37a, 38a) of at least either one of the output shaft and the moving body, and an angle formed by the notch with respect to a shaft direction is made smaller than the lead angle of a helical spline.
Claims5
An engine startup device, comprising:
- a motor that produces torque with electric power supplied thereto;
- an output shaft on which is formed a helical spline that transmits the torque from the motor;
- a moving body that has a helical spline engaging with the output shaft and transmits the torque from the motor to an engine side;
- and
- an electromagnetic switch equipped with a mechanism that independently performs a function of magnetizing a motor-operating plunger by activating a motor-operating solenoid coil and switching on/off the power to the motor by the movement of the motor-operating plunger, and a function of magnetizing a moving-body-operating plunger by activating a moving-body-operating solenoid coil and thrusting out the moving body towards a ring gear side via a thrust-out mechanism by the movement of the moving-body-operating plunger;
- wherein
- a notch is formed on a power-transmitting-side tooth surface of a helical spline of at least either one of the output shaft and the moving body, and helical splines of the output shaft and the moving body are arranged in such a way that the notch of the either one of the output shaft and the moving body engages with part of the helical spline of the other when the engine startup device stopping.
4 more elements
Dependencies are inferred from the claim text.