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Vehicle generator having circuit protective cover

一种发电机、保护盖的技术，应用在同步发电机、电气元件、机电装置等方向，能够解决破碎、FRP保护盖低可弯曲性、断裂等问题

Active Publication Date: 2005-07-20
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the FRP protective cover has low bendability and may break or shatter under a large amount of impact at the time of a vehicle collision or the like

Method used

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  • Vehicle generator having circuit protective cover
  • Vehicle generator having circuit protective cover
  • Vehicle generator having circuit protective cover

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0025] 1 and 2 show a three-phase AC generator (alternator) 1 for automobiles according to a first embodiment of the present invention. The engine of the car drives the AC generator 1 via a belt. The AC generator 1 charges the storage battery and supplies electrical energy to corresponding electronic devices located on the car. The AC generator 1 comprises an alternator 2 and a circuit arrangement 3 for rectifying three-phase AC to DC.

[0026] The alternator 2 has a housing 4 comprising a drive-side aluminum front frame 41 and a rear frame 42 which are fixedly connected to each other. A pair of bearings 43 , 44 holds the rotating shaft 21 of the alternator 2 at the center of the housing 4 so as to extend out of the housing 4 . The rotating shaft 21 is fixed at its front end (left end in the figure) with a pulley 22 driven by an engine through a belt, and at its rear end slip rings 23, 23 are also fixed. The rotating shaft 2 has a rotor 24 fixed in its middle (so as to be p...

no. 2 example

[0034] 5A and 5B show the protective cover 6 of the AC generator according to the second embodiment. The protective cover 6 has extendable portions 61 along the periphery of the protective cover 6 which are arcuate lines protruding on its outer face and recessed on its inner face. The protective cover 6 may have a plurality of arc lines aligned side by side along the radial direction of the protective cover 6 . This AC generator 1 prevents the positive potential portion of the circuit device 3 from coming into contact with a grounded portion such as the vehicle chassis by the extendable portion 61 deformed upon secondary collision with the vehicle chassis or the like to prevent the protective cover 6 from breaking.

no. 3 example

[0036] 6A and 6B show the protective cover 7 of the AC generator according to the third embodiment. The protective cover 7 has a thin-walled portion 71 and an arc-shaped groove located inside its outer peripheral portion. A plurality of thin-walled portions 71 may be provided so as to be aligned side by side in the radial direction of the protective cover 7 . This AC generator 1 prevents the protection cover 7 from breaking at a portion close to the positive potential portion since the protection cover 7 is selectively broken at the thin wall portion 71 upon a secondary collision with the vehicle chassis. Thus, the protective cover 7 effectively prevents itself from breaking at the portion covering the positive potential portion of the circuit arrangement 3, which is required for electrical insulation.

[0037] Even when the AC generator 1 is subjected to a secondary collision of a vehicle collision, by preventing the circuit device 3 from being exposed and by preventing the ...

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PUM

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Abstract

The vehicle generator having a circuit protective cover of present invention comprises a housing, an electric circuit device and a protective cover. The housing encloses a stator on which an armature coil is wound and a rotor located inside the stator to face each other. The electric circuit device is located outside the housing for rectifying AC induced in the armature coil to DC. The protective cover covers the electric circuit device. The protective cover is made of a composite material including a polyamide and an elastomer. It is desirable that the protective cover has a mechanical properties including: a maximum elongation of 10% or higher; and a Charpy impact strength with notch of 78 kJ / m2 or higher.

Description

technical field [0001] The present invention relates to a vehicle generator having a circuit protection cover on a vehicle such as a car and a truck, and particularly to a small vehicle generator whose circuit device is installed on the outside of the casing and which effectively prevents the above two collision. Background technique [0002] A small AC generator located on and driven by an automobile engine comprises an alternator having a stator on which armature coils are wound and a rotor located inside and facing the stator in a housing. The front frame and the rear frame fixed to each other constitute the casing. The generator also includes a circuit arrangement located behind the rear end frame and which rectifies AC induced in the armature coils to DC. The circuit arrangement is connected to a battery located on the vehicle via a charging circuit. [0003] The circuit device includes a rectifier, a brush holder holding a brush, an IC regulator, and the like. A pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K5/02H02K5/04H02K5/10H02K11/04H02K19/22
CPCH02K5/10H02K11/046H02K5/02H02K19/22H02K11/05
Inventor 三崎孝一
Owner DENSO CORP
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