Stator for outer rotor multipole generator and method of assembling the stator

• US 7,492,067 B2
• Filed: 09/24/2003
• Issued: 02/17/2009
• Est. Priority Date: 09/24/2002
• Status: Active Grant

• Current Assignee: Sawafuji Electric Company Limited
• Original Assignee: Sawafuji Electric Company Limited
• Inventors: Kotajima, Hitoshi
• Primary Examiner(s): Tamai; Karl I
• Assistant Examiner(s): Desai; Naishadh N
• Application Number:
  US10/528,799
• Publication Number:
  US 20060103247A1
• Time in Patent Office: 1,973 Days
• Field of Search: 310/71
• US Class Current: 310/71
• CPC Class Codes: H02K 2203/06 Machines characterised by the wiring leads, i.e. conducting wires for connecting the winding terminations
• CPC Class Codes: H02K 3/522 for generally annular cores with salient poles
• CPC Class Codes: H02K 5/04 Casings or enclosures characterised by the shape, form or construction thereof
• CPC Class Codes: Y10T 29/49011 Commutator or slip ring assembly

Abstract

An outer rotor type multi-pole generator stator is provided in which a lead wire extending from a coil is connected by fusing to a connecting terminal fitted into and fixed to a bobbin wherein, in order to avoid the lead wire becoming slack after connection by fusing and enable assembly of the stator to be carried out efficiently, the connecting terminal (32) is formed from an external conductor connection terminal portion (32a) that is fitted into and fixed to a fitting hole (31), a connecting plate portion (32b) having one end thereof connected at right angles to the external conductor connection terminal portion (32a) and extending toward the radially inner side of the stator, and a clamping plate portion (32c) provided so as to be connected to the connecting plate portion (32b) so that the lead wire (33) can be held between the clamping plate portion (32c) and the other end portion of the connecting plate portion (32b) and connected by fusing, and the bobbin (24) is provided on the inner periphery thereof with a channel (43) having one end thereof facing the other end of the connecting plate portion (32b) and opposite ends thereof open so that one electrode of a pair of electrodes (44, 45) for connecting by fusing can be inserted through the channel (43).

Claims

1. An outer rotor type multi-pole generator stator in which a plurality of coils are wound, via a bobbin, around a plurality of projecting poles provided on an outer periphery of a stator core, and a plurality of connecting terminals manufactured from a conductive metal are fitted into and fixed to a plurality of fitting holes defined in the bobbin inwardly of the coils relative to a radial direction of the stator core, each connecting terminal having one end thereof connected to an external conductor and having the other end thereof connected, by fusing, to a lead wire extending from the coil,

wherein each of the connecting terminals comprises

an external conductor connection terminal portion fitted into and fixed to the fitting hole, wherein one end thereof is connected to the external conductor and projects from the fitting hole,

a flat connecting plate portion having one end thereof connected at right angles to the other end of the external conductor connection terminal portion and extending toward a radial inner side of the stator, and

a clamping plate portion connected to the connecting plate portion wherein the lead wire is held between the clamping plate portion and the other end portion of the connecting plate portion and connected by fusing, and

wherein a channel or a through hole is defined in the bobbin and has one end thereof facing said other end of the connecting plate portion and a diameter larger than a diameter of the fitting hole wherein one electrode of a pair of electrodes extends into the channel or through hole.

2. The outer rotor type multi-pole generator stator according to claim 1, wherein the connecting plate portion has a trapezoidal shape with a width which decreases in a direction going toward the radial inner side of the stator.

3. An assembly method for the outer rotor type multi-pole generator stator according to claim 1 or claim 2 wherein, when assembling the connecting terminals to the bobbin and connecting the lead wire, by fusing, to the connecting terminal, the method comprises the following, sequential steps:

a step of fixing each of the connecting terminals to the bobbin by fitting the external conductor connection terminal portion into the fitting hole until the connecting plate portion abuts against the bobbin;

a step of clamping the lead wire between the connecting plate portion and the clamping plate portion;

a step of clamping the lead wire between the connecting plate portion and the clamping plate portion using pressure from the pair of electrodes wherein the one electrode is inserted into the channel or the through hole, and

a step of cutting off an unwanted portion of the lead wire projecting from the connecting terminal.

4. The outer rotor type multi-pole generator stator according to claim 1, wherein each opposing side surface of the external conductor connection terminal portion includes a barb extending away therefrom.