US-20260128653-A1 - WINDING METHOD AND WINDING APPARATUS

US20260128653A1US 20260128653 A1US20260128653 A1US 20260128653A1US-20260128653-A1

Abstract

The nozzle has an inclination angle relative to a rotation shaft, substantially equal to half of an angle between adjacent magnetic poles of a rotor. A wire is wound on a first portion of a magnetic pole by linearly moving the rotation shaft together with the nozzle in a first direction parallel to an axis of the rotor. Thereafter, the nozzle is rotated about the rotation shaft in a second direction by approximately 180 degrees, whereby the wire is wound on a second portion of the magnetic pole. Thereafter, the rotation shaft is linearly moved together with the nozzle in a direction opposite to the first direction, whereby the wire is wound on a third portion of the magnetic pole. Thereafter, the nozzle is rotated about the rotation shaft in the second direction by approximately 180 degrees, whereby the wire is wound on a fourth portion of the magnetic pole.

Inventors

Noburo Miyawaki
Daiki Saito
Shunji OSARI
Shinya Hasegawa

Assignees

ODAWARA ENGINEERING CO., LTD.

Dates

Publication Date: 20260507
Application Date: 20251229
Priority Date: 20230628

Claims (13)

1 . A winding method for an armature in which a plurality of magnetic poles are radially arranged and face outward in a radial direction of the armature, an outer circumferential surface of an axis of each magnetic pole including a pair of a first portion and a third portion extending in parallel with a central axis direction of the armature, and a second portion and a fourth portion respectively located between distal ends of the first portion and the third portion, the method comprising: preparing a nozzle configured to feed a wire, the nozzle being supported relative to a rotation shaft perpendicular to the central axis of the armature and extending along the radial direction such that the nozzle has an inclination angle, relative to the rotation shaft, that is a first angle equal to half of an angle formed between adjacent magnetic poles among the plurality of magnetic poles; and while feeding the wire from the nozzle, performing one turn of winding around the magnetic pole by: linearly moving the rotation shaft together with the nozzle in a first direction parallel to the central axis; after the nozzle reaches in the vicinity of a second-portion-side distal end of the first portion, rotating the nozzle about the rotation shaft in a second direction by approximately 180 degrees; thereafter linearly moving the rotation shaft together with the nozzle in a direction opposite to the first direction; and after the nozzle reaches in the vicinity of a fourth-portion-side distal end of the third portion, rotating the nozzle about the rotation shaft in the second direction by approximately 180 degrees.
2 . The winding method according to claim 1 , wherein the one turn of winding around the magnetic pole comprises: winding the wire onto the first portion of the magnetic pole by linearly moving the rotation shaft together with the nozzle in the first direction; after the nozzle reaches in the vicinity of the second-portion-side distal end of the first portion, winding the wire onto the second portion of the magnetic pole by rotating the nozzle about the rotation shaft in the second direction by approximately 180 degrees; thereafter winding the wire onto the third portion of the magnetic pole by linearly moving the rotation shaft together with the nozzle in the direction opposite to the first direction; and after the nozzle reaches in the vicinity of the fourth-portion-side distal end of the third portion, winding the wire onto the fourth portion of the magnetic pole by rotating the nozzle about the rotation shaft in the second direction by approximately 180 degrees.
3 . The winding method according to claim 1 , wherein the nozzle is supported by a nozzle support unit that is supported on the rotation shaft, such that the nozzle is slidable along a conveyance path having an inclination angle of the first angle relative to the rotation shaft, and wherein the method comprises: while sliding the nozzle by a predetermined distance along the conveyance path during the one turn of winding around the magnetic pole, performing a plurality of turns of winding around the magnetic pole, thereby performing aligned winding of the wire on the magnetic pole.
4 . The winding method according to claim 1 , wherein, when rotating the nozzle about the rotation shaft in the second direction, the nozzle is rotated in the same direction as a rotation of the rotation shaft and by the same angle as the rotation of the rotation shaft.
5 . A winding apparatus configured to perform winding on an armature in which a plurality of magnetic poles are radially arranged and face outward in a radial direction of the armature, the winding apparatus comprising: a rotation shaft configured to be disposed perpendicular to a central axis of the armature as a winding target and along the radial direction; a first driving unit configured to rotate the rotation shaft about its axis; a second driving unit configured to move the rotation shaft in a direction parallel to the central axis of the armature; a nozzle configured to feed a wire; a nozzle support unit configured to support the nozzle such that the nozzle has an inclination angle, relative to the rotation shaft, that is a first angle equal to half of an angle formed between adjacent magnetic poles among the plurality of magnetic poles of the armature; and a controller configured to control the first driving unit and the second driving unit such that, with respect to the armature in which an outer circumferential surface of an axis of each magnetic pole includes a pair of a first portion and a third portion extending in parallel with a central axis direction of the armature, and a second portion and a fourth portion respectively located between distal ends of the first portion and the third portion, while feeding the wire from the nozzle, the rotation shaft is linearly moved together with the nozzle supported by the nozzle support unit in a first direction parallel to the central axis; after the nozzle reaches in the vicinity of a second-portion-side distal end of the first portion, the nozzle is rotated about the rotation shaft in a second direction by approximately 180 degrees; thereafter the rotation shaft is linearly moved together with the nozzle in a direction opposite to the first direction; and after the nozzle reaches in the vicinity of a fourth-portion-side distal end of the third portion, the nozzle is rotated about the rotation shaft in the second direction by approximately 180 degrees, thereby performing one turn of winding around the magnetic pole.
6 . The winding apparatus according to claim 5 , wherein the controller is configured to control the first driving unit and the second driving unit such that the wire is wound onto the first portion of the magnetic pole by linearly moving the rotation shaft together with the nozzle in the first direction; after the nozzle reaches in the vicinity of the second-portion-side distal end of the first portion, the wire is wound onto the second portion of the magnetic pole by rotating the nozzle about the rotation shaft in the second direction by approximately 180 degrees; thereafter the wire is wound onto the third portion of the magnetic pole by linearly moving the rotation shaft together with the nozzle in the direction opposite to the first direction; and after the nozzle reaches in the vicinity of the fourth-portion-side distal end of the third portion, the wire is wound onto the fourth portion of the magnetic pole by rotating the nozzle about the rotation shaft in the second direction by approximately 180 degrees, thereby performing the one turn of winding around the magnetic pole.
7 . The winding apparatus according to claim 5 , wherein the nozzle support unit comprises a conveyance path configured to support the nozzle such that the nozzle is slidable with an inclination angle of the first angle relative to the rotation shaft, the apparatus further comprising a third driving unit configured to slide the nozzle supported within the conveyance path, wherein the controller is configured to control the third driving unit such that, during the one turn of winding around the magnetic pole, the nozzle is slid by a predetermined distance along the conveyance path.
8 . The winding apparatus according to claim 5 , wherein the first driving unit comprises: a first pulley operatively coupled to the rotation shaft; a motor; a second pulley operatively coupled to the motor; a belt looped around between the first pulley and the second pulley; a link that supports the first pulley rotatably relative to the second pulley; and a coupling provided between the second pulley and a rotation shaft of the motor, the coupling being configured to transmit rotation of the motor to the second pulley while allowing a positional displacement of the second pulley in a direction orthogonal to a movement direction of the rotation shaft by the second driving unit.
9 . The winding apparatus according to claim 8 , wherein the first pulley and the second pulley have the same number of teeth, the belt is a timing belt, and the coupling is an Oldham coupling.
10 . The winding apparatus according to claim 7 , wherein the rotation shaft comprises: an outer cylinder configured to be rotated by the first driving unit; and an inner shaft located inside the outer cylinder and configured to be rotated together with the outer cylinder, wherein the nozzle support unit comprises: a base member fixed to the outer cylinder and having the conveyance path; and a nozzle support body provided to be slidable along the conveyance path and configured to support the nozzle, wherein the nozzle support body has an arm extending in a direction orthogonal to a direction of the slide movement, the arm being engaged, via a cam follower, with an annular groove formed at a distal end portion of the inner shaft on the armature side, such that movement of the inner shaft in its axial direction causes the nozzle support body to slide, and wherein the third driving unit is configured to slide the nozzle via the nozzle support body by moving the inner shaft in its axial direction.
11 . The winding apparatus according to claim 10 , comprising a rail member extending along the central axis direction of the armature as the winding target, wherein a rear end portion of the inner shaft on a side opposite to the armature is supported by the rail member, and wherein the third driving unit is configured to move the inner shaft in its axial direction by sliding the rail member in the axial direction of the inner shaft.
12 . The winding apparatus according to claim 5 , wherein a cross section of the nozzle, taken perpendicular to a longitudinal direction of the nozzle, has a shape having a major axis and a minor axis with a wire feed port located substantially at a center thereof, and wherein a curved guide surface is formed on a surface of a longitudinal end portion of the nozzle, the curved guide surface having a larger radius of curvature on a major-axis side than on a minor-axis side.
13 . The winding apparatus according to claim 5 , wherein, during the one turn of winding around the magnetic pole, the nozzle is rotated together with the rotation shaft in the same rotational direction and by the same rotational angle as a rotation of the rotation shaft.

Description

FIELD The present invention relates to a winding method and a winding apparatus for winding onto an armature in which a plurality of magnetic poles are radially arranged and face outward in a radial direction of the armature. BACKGROUND In a winding method for magnetic poles of an armature in which a plurality of magnetic poles are radially arranged and face outward in a radial direction of the armature, there is known a method in which, for example, after a rotor of an inner-rotor type motor is rotated by an angle formed between adjacent magnetic poles, a nozzle is linearly moved in one direction along a rotational axis direction of the rotor, and after the nozzle reaches an opposite side of the magnetic pole, the rotor is rotated in an opposite direction by the same angle, and thereafter the nozzle is linearly moved in a direction opposite to the above direction along the rotational axis direction, whereby the nozzle is substantially caused to travel once around the magnetic pole. That is, winding around both axial end portions of the magnetic pole in the rotational axis direction of the rotor is performed by rotating the rotor. It is also known to perform alignment winding in which multiple turns of winding are made such that the wire is aligned on the magnetic pole by repetitively performing the above operation with the nozzle being displaced (moved forward and backward) in the axial direction of the magnetic pole. An example of a winding apparatus that performs such winding is disclosed in PTL 1. CITATION LIST Patent Literature [PTL 1] Japanese Patent Application Laid-Open Publication No. Hei 5 (1993)-122909[PTL 2] Japanese Patent Application Laid-Open Publication No. 2002-119025[PTL 3] Japanese Patent Application Laid-Open Publication No. 2004-328844 SUMMARY However, in the above method in which the rotor is rotated at both end portions of the magnetic pole to perform winding, the tip of the nozzle traces an arc-shaped trajectory relative to the magnetic pole (see FIG. 6B), resulting in a problem that alignment accuracy of the wire deteriorates. In order to solve this problem, it may be considered to implement a countermeasure in which, during rotation of the rotor, the nozzle or the rotor is displaced in the axial direction of the magnetic pole by an amount that cancels the arc-shaped positional displacement, thereby converting the arc-shaped trajectory of the nozzle into a linear trajectory. However, this approach involves complicated compensatory operations, and thus another problem remains in that the winding speed is reduced. The present invention has been made in view of the above circumstances, and an object of the invention is to enable high-speed and high-accuracy winding onto an armature in which a plurality of magnetic poles are radially arranged and face outward in a radial direction of the armature, without requiring complicated control or compensatory operations of the nozzle. In order to achieve the above object, a winding method according to the present invention is a winding method for an armature in which a plurality of magnetic poles are radially arranged and face outward in a radial direction of the armature, an outer circumferential surface of an axis of each magnetic pole including a pair of a first portion and a third portion extending in parallel with a central axis direction of the armature, and a second portion and a fourth portion respectively located between distal ends of the first portion and the third portion, the method comprising: preparing a nozzle configured to feed a wire, the nozzle being supported relative to a rotation shaft perpendicular to the central axis of the armature and extending along the radial direction such that the nozzle has an inclination angle, relative to the rotation shaft, that is a first angle equal to half of an angle formed between adjacent magnetic poles among the plurality of magnetic poles; and while feeding the wire from the nozzle, performing one turn of winding around the magnetic pole by: linearly moving the rotation shaft together with the nozzle in a first direction parallel to the central axis; after the nozzle reaches in the vicinity of a second-portion-side distal end of the first portion, rotating the nozzle about the rotation shaft in a second direction by approximately 180 degrees; thereafter linearly moving the rotation shaft together with the nozzle in a direction opposite to the first direction; and after the nozzle reaches in the vicinity of a fourth-portion-side distal end of the third portion, rotating the nozzle about the rotation shaft in the second direction by approximately 180 degrees. In such a winding method, the one turn of winding around the magnetic pole may include: winding the wire onto the first portion of the magnetic pole by linearly moving the rotation shaft together with the nozzle in the first direction; after the nozzle reaches in the vicinity of the second-portion-side distal end of the first portion,