JP2010161872A - Core sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a core sheet that allows smooth winding work while fully responding to the request for high power in a low-speed rotation region. <P>SOLUTION: A core sheet 100 is configured as follows. A pair of bent parts 22b, 22c extends to both free ends at a flange base 22a of a belt-like flange 22. A gap dimension S of a minimum gap X, formed between the mutually-facing bent parts 22b, 22c at teeth 2, 2 adjacent to each other, is large before being applied with pressing force. Subsequently, winding work of a power-generation coil 200 is performed to a lamination part 300a (a winding part 300a of a stator core 300) of a belt-like winding part 21 while the plurality of core sheets 100 are stacked and fixed. If pressing force is applied after the end of the winding work, the gap dimension S is reduced by plastic deformation of the mutually-facing bent parts 22b, 22c. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a core sheet, and more particularly to a core sheet constituting a stator core around which a power generating coil is wound.

  In a magnetic generator that is mounted on an engine such as a motorcycle, buggy, or snow vehicle and charges a battery and supplies electric power to an electric load, each core sheet constituting a stator core around which a generator coil is wound is shown in FIG. As shown in (A) and (B), it is composed of a hollow disk-shaped mounting base 1 and a plurality of teeth 2 extending radially from the outer periphery of the hollow disk-shaped mounting base 1 at equal intervals in the circumferential direction. Each tooth portion 2 has a strip-like winding portion 21 extending from the outer periphery of the hollow disc-shaped mounting base portion 1, and the tip of the strip-like winding portion 21 is substantially orthogonal to the longitudinal direction of the strip-like winding portion 21. It extends and is comprised from the strip | belt-shaped flange part 22 which comprises a magnetic pole (for example, refer patent document 1).

  The conventional core sheet 100 is used when the power generation coil 200 is wound on the laminated portion 300a of the belt-like winding portion 21 (the winding portion 300a of the stator core 300) in a state where a plurality of core sheets 100 are laminated and fixed. The conductive wire 201 guided by the former of the winding machine passes through the gap X formed between the adjacent strip-shaped flange portions 22 and 22, and the laminated portion 300a of the strip-shaped winding portion 21 (the winding of the stator core 300). As shown in FIG. 6 (B), the dimension S of the gap X is set to a relatively large numerical value that does not hinder the passage of the conductive wire 201 so as to be wound around the portion 300a).

JP 2008-131820 A

  However, according to the conventional core sheet 100 as described above, as the gap dimension S is set to a relatively large value, the width dimension W of the band-shaped flange portion 22 is limited to a relatively small value. The number of turns of the power generating coil 200 that can be wound around the laminated portion 300a of the winding portion 21 (the winding portion 300a of the stator core 300) is limited, and it is sufficient to meet the demand for higher output in the low-speed rotation region accompanying an increase in electrical load. There is a problem that it is difficult to respond.

  As a measure to meet the demand for higher output in the low speed rotation range, as shown in FIGS. 7A and 7B, the gap dimension S is set to a relatively small value, and the width W of the belt-like flange portion 22 is set. Can be set to a relatively large value.

  However, when the gap dimension S is set to a relatively small numerical value, in the winding work in which the conductive wire 201 is wound around the laminated portion 300a of the strip-shaped winding portion 21 (the winding portion 300a of the stator core 300), the conductive wire 201 is strip-shaped. Interference with the flange portion 22 makes it difficult to smoothly perform the winding work.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a core sheet capable of facilitating winding work while sufficiently meeting the demand for higher output in a low-speed rotation region. To do.

  The core sheet of the present invention is composed of a hollow disk-shaped mounting base and a plurality of teeth extending radially at equal intervals from the outer periphery of the hollow disk-shaped mounting base, and constitutes a stator core Each of the teeth portions extends from the outer periphery of the hollow disc-shaped mounting base, and the tip of the belt-like winding portion is substantially orthogonal to the longitudinal direction of the belt-like winding portion. In the core sheet composed of the strip-shaped flange portion extending in the manner described above, the strip-shaped flange portion includes a flange base portion corresponding to a virtual extension portion in the longitudinal direction of the strip-shaped winding portion, and both free ends of the flange base portion, respectively. It is composed of a pair of curved portions that extend along the short direction of the belt-shaped winding portion and can be plastically deformed by external pressure, and are formed between adjacent curved portions in adjacent teeth portions. Gap The gap size of the minute is large before the applied pressure is applied, and then the winding operation of the power generating coil is performed on the laminated portion of the belt-like winding portion in a state where a plurality of core sheets are laminated and fixed, When the applied pressure is applied after the end, it is configured to be reduced by plastic deformation of the curved portions facing each other.

  Here, each of the bending portions constituting the pair of bending portions extends from the free end of the flange base portion so as to be positioned on a virtual plane that is flush with the belt-shaped winding portion, and as it goes toward the tip, The degree of curvature increases in a direction away from the hollow disk-shaped mounting base, and is configured to be plastically deformed from a curved state to a linear state by the applied pressure.

  Alternatively, each of the bending portions constituting the pair of bending portions extends in a short direction of the band-shaped winding portion from the free end of the flange base portion, and has a degree of curvature in a direction returning to the flange base portion toward the tip. It is comprised so that it may increase, and it is comprised so that it may plastically deform from a curved state to a linear state with the said applied pressure.

  In the core sheet of the present invention, a pair of curved portions are extended at both free ends of the flange base portion of the belt-shaped flange portion, and the gap size of the smallest gap portion formed between the curved portions facing each other in adjacent teeth portions is Before the pressure is applied, it is large, and then the winding operation of the power generating coil is performed on the laminated portion of the belt-like winding portion (the winding portion of the stator core) in a state where the plurality of core sheets are laminated and fixed. When a pressing force is applied after the end, it is configured to be reduced by plastic deformation of the curved portions facing each other. For this reason, since the gap size of the minimum gap portion is large before plastic deformation of the curved portion, when conducting the winding operation of the power generating coil on the laminated portion of the belt-shaped winding portion (winding portion of the stator core), the conductive wire is the strip-shaped flange. It is guided to the laminated part of the belt-like winding part (the winding part of the stator core) without interfering with the part, and smooth winding work can be performed. In addition, since the gap size of the minimum gap portion becomes smaller after plastic deformation of the curved portion, the conductive wire of the power generating coil wound around the laminated portion of the belt-like winding portion (winding portion of the stator core) passes through the minimum gap portion. It becomes difficult to do. For this reason, even if the number of turns of the power generating coil wound around the laminated portion of the belt-shaped winding portion (the winding portion of the stator core) is increased, the winding state of the power generating coil is not easily broken after plastic deformation of the curved portion. Therefore, the number of turns of the power generation coil can be increased, and high output in the low speed rotation region can be achieved by increasing the number of turns of the power generation coil.

It is a top view of the core sheet concerning a 1st embodiment of the present invention. (A) is an enlarged view of a main part of a stator core formed by laminating and fixing a plurality of the core sheets, and (B) is a power coil winding work for the stator core shown in FIG. It is a principal part enlarged view of the stator showing the state after performing the plastic deformation operation | work with respect to the curved part. It is a top view of the core sheet which concerns on 2nd Embodiment. (A) is an enlarged view of the main part of the core sheet, and (B) is a power generation coil winding work for a winding part of a stator core formed by laminating and fixing a plurality of the core sheets. It is a principal part enlarged view of the stator showing the state after performing plastic deformation operation | work with respect to the curved part of a sheet | seat. FIG. 4A is a view of the stator core shown in FIG. 4A, and FIG. 4B is a view of the stator shown in FIG. 4B. FIG. (A) is a plan view of a conventional core sheet, and (B) is manufactured by performing a generator coil winding operation on a winding portion of a stator core formed by stacking and fixing a plurality of the core sheets. It is a principal part enlarged view of a stator. (A) is a plan view of a core sheet as a premise of the present invention, and (B) is an enlarged view of a main part of a stator core formed by laminating and fixing a plurality of the core sheets.

<First embodiment>
1 and 2, the core sheet 100 is an element constituting a stator core 300 around which a power generation coil 200 (FIG. 2B) is wound in a magnet generator.

  The core sheet 100 is configured by pressing a thin electromagnetic steel plate, and a plurality of teeth portions extending radially from the outer circumference of the hollow disk-shaped mounting base 1 and the hollow disk-shaped mounting base 1 at equal intervals in the circumferential direction. 2 is comprised.

  The hollow disk-shaped mounting base 1 is formed by winding a power generating coil 200 around a winding portion 300a of a stator core 300 formed by laminating and fixing a plurality of core sheets 100, and the wound stator core 300 is not shown in an engine cover. The mounting hole 11 is inserted through the fixing bracket when the fixing bracket is fixed.

  Each tooth portion 2 includes a belt-like winding portion 21 extending from the outer periphery of the hollow disc-like mounting base portion 1 and a longitudinal direction a of the belt-like winding portion 21 at the tip of the belt-like winding portion 21 (FIG. 2A). ) And a belt-like flange portion 22 extending substantially orthogonally. The band-shaped winding part 21 constitutes a laminated part 300a when the stator core 300 is formed by laminating and fixing a plurality of core sheets 100, and the laminated part 300a is a winding part around which the generator coil 200 is wound in the stator core 300. Configure.

  The band-shaped flange portion 22 includes a flange base portion 22a corresponding to a virtual extension portion in the longitudinal direction of the band-shaped winding portion 21, and a short direction b of the band-shaped winding portion 21 from both free ends of the flange base portion 22a (FIG. 2A). ) And a pair of curved portions 22b and 22c that can be plastically deformed by pressure applied by a press or the like.

  Each of the curved portions 22b and 22c extends from the free end of the flange base portion 22a so as to be positioned on a virtual plane that is flush with the belt-like winding portion 22, and moves away from the hollow disk-shaped mounting base portion 1 toward the tip. The degree of curvature increases in the direction. As shown in FIG. 2A, a notch 22d is provided on the convex curved surface side of the curved portions 22b and 22c, and the notch 22d facilitates plastic deformation of the curved portions 22b and 22c.

  As shown in FIG. 2A, the gap dimension S of the minimum gap portion X formed between the curved portions 22b and 22c facing each other in the adjacent tooth portions 2 and 2 is before the pressure is applied. Is large (S = S0), and then the winding operation of the power generating coil 200 is performed on the laminated portion 300a of the strip-like winding portion 21 (the winding portion 300a of the stator core 300) in a state where the plurality of core sheets 100 are laminated and fixed. When the pressing force is applied after the end, as shown in FIG. 2B, the bending portions 22b and 22c facing each other are configured to be reduced by plastic deformation (S = S1).

  Next, the main process in the operation | work which manufactures the stator 400 using the core sheet 100 comprised as mentioned above is demonstrated.

  First, a plurality of core sheets 100 are aligned and stacked, and fixed by rivets or press caulking to produce a stator core 300 as shown in FIG.

  Next, the power generating coil 200 is wound around the laminated portion 300a of the strip-shaped winding portion 21 of the core sheet 100 (the winding portion 300a of the stator core 300) by a winding machine. In this winding operation, the gap dimension S of the minimum gap portion X formed between the curved portions 22b and 22c facing each other in the adjacent tooth portions 2 and 2 is large as shown in FIG. (S = S0), the conductive wire 201 of the power generation coil 200 is guided to the laminated portion 300a of the strip-shaped winding portion 21 (the winding portion 300a of the stator core 300) without interfering with the strip-shaped flange portion 22 of each core sheet 100. Smooth winding work can be performed.

  After the winding operation of the power generation coil 200 is completed, pressure is applied to the curved portions 22b and 22c of each core sheet 100 by a press or the like, and the curved portions 22b and 22c are changed from the curved state shown in FIG. Plastically deform to the linear state shown in (B).

  When the curved portions 22b and 22c are plastically deformed in a linear state, the gap dimension S of the minimum gap portion X is reduced (S = S1), and the winding is wound around the laminated portion 300a of the belt-like winding portion 21 (the winding portion 300a of the stator core 300). The conducting wire 201 of the wired power generation coil 200 is difficult to pass through the minimum gap portion X. For this reason, even if the number of turns of the power generating coil 200 wound around the laminated portion 300a of the strip-shaped winding portion 21 (the winding portion 300a of the stator core 300) is increased, the power generating coil 200 is subjected to plastic deformation of the curved portions 22b and 22c. The winding state of becomes difficult to collapse. Therefore, the number of turns of the power generation coil 200 can be increased, and high output in a low-speed rotation region can be achieved by increasing the number of turns of the power generation coil 200.

<Second Embodiment>
3-5, the core sheet 100 is the same as the core sheet 100 of the first embodiment described above, and in the magnet generator, the power generating coil 200 (FIGS. 4B and 5B) is wound. It becomes an element which constitutes stator core 300 to be performed.

  The core sheet 100 is configured by pressing a thin electromagnetic steel plate, and a plurality of teeth portions extending radially from the outer circumference of the hollow disk-shaped mounting base 1 and the hollow disk-shaped mounting base 1 at equal intervals in the circumferential direction. 2 is comprised.

  The hollow disk-shaped mounting base 1 is formed by winding a power generating coil 200 around a winding portion 300a of a stator core 300 formed by laminating and fixing a plurality of core sheets 100, and the wound stator core 300 is not shown in an engine cover. The mounting hole 11 is inserted through the fixing bracket when the fixing bracket is fixed.

  Each of the teeth portions 2 includes a belt-like winding portion 21 extending from the outer periphery of the hollow disc-like mounting base 1, and a longitudinal direction a of the belt-like winding portion 21 at the tip of the belt-like winding portion 21 (FIG. 4A). ) And a belt-like flange portion 22 extending substantially orthogonally. The band-shaped winding part 21 constitutes a laminated part 300a when the stator core 300 is formed by laminating and fixing a plurality of core sheets 100, and the laminated part 300a is a winding part around which the generator coil 200 is wound in the stator core 300. Configure.

  The band-shaped flange portion 22 includes a flange base portion 22a corresponding to a virtual extension portion in the longitudinal direction of the band-shaped winding portion 21, and a short direction b of the band-shaped winding portion 21 from both free ends of the flange base portion 22a (FIG. 4A). ) And a pair of curved portions 22b and 22c that can be plastically deformed by pressure applied by a press or the like.

  Each of the curved portions 22b and 22c is configured to extend from the free end of the flange base portion 22a in the short direction b of the strip-shaped winding portion 21, and to increase the degree of curvature in a direction returning to the flange base portion 22a toward the tip. It is configured to be plastically deformed from a curved state to a linear state by the applied pressure.

  As shown in FIG. 4A, the gap dimension S of the minimum gap portion X formed between the curved portions 22b and 22c facing each other in the adjacent tooth portions 2 and 2 is before the pressure is applied. Is large (S = S0), and then the laminated portion 300a of the belt-like winding portion 21 (the winding portion 300a of the stator core 300) in a state where a plurality of core sheets 100 are laminated and fixed (the state shown in FIG. 5A). When the winding operation of the power generating coil 200 is performed and a pressing force is applied after the winding is completed, as shown in FIG. 4 (B), the bending portion 22b, 22c facing each other becomes smaller due to plastic deformation (S = S1). Composed.

  Next, the main process in the operation | work which manufactures the stator 400 using the core sheet 100 comprised as mentioned above is demonstrated.

  First, as shown in FIG. 5A, a predetermined number of core sheets 100 are stacked in the same direction to form the first core sheet block 500A, and the same number of core sheets 100 are stacked in the same direction. The second core sheet block 500B is formed, and then the first core sheet block 500A and the second core sheet block 500B are fixed to each other by rivets or press caulking in a state of being opposite to each other, and the stator core 300 is manufactured. . Each core sheet 100 constituting the stator core 300 is held in the same shape before being manufactured into the stator core 300, but after being manufactured into the stator core 300, as shown in FIG. They are deformed so that they are in close contact with each other.

  Next, the power generating coil 200 is wound around the laminated portion 300a of the strip-shaped winding portion 21 of the core sheet 100 (the winding portion 300a of the stator core 300) by a winding machine. In this winding work, the gap dimension S of the minimum gap portion X formed between the curved portions 22b and 22c facing each other in the adjacent tooth portions 2 and 2 is large (before the stator core 300 is manufactured). As shown in FIG. 4A, S = S0, and after the stator core 300 is manufactured, S <S0, and the conductive wire 201 of the power generation coil 200 is connected to each core sheet 100. Guided to the laminated portion 300a of the strip-shaped winding portion 21 (the winding portion 300a of the stator core 300) without interfering with the strip-shaped flange portion 22, smooth winding work can be performed.

  After finishing the winding operation of the power generation coil 200, the bending portions 22b and 22c of each core sheet 100 of the first core sheet block 500A and the bending portions 22b of each core sheet 100 of the second core sheet block 500B are performed by a press or the like. A pressing force is applied in a direction in which 22c approaches each other, and the curved portions 22b and 22c of each core sheet 100 are plastically deformed from the curved state shown in FIG. 5 (A) to the linear state shown in FIG. 5 (B).

  When the curved portions 22b and 22c are plastically deformed in a linear state, the gap dimension S of the minimum gap portion X is reduced (S = S1), and the winding is wound around the laminated portion 300a of the belt-like winding portion 21 (the winding portion 300a of the stator core 300). It is difficult for the conductive wire 201 of the wired power generation coil 200 to pass through the minimum gap portion X. For this reason, even if the number of turns of the power generating coil 200 wound around the laminated portion 300a of the strip-shaped winding portion 21 (the winding portion 300a of the stator core 300) is increased, the power generating coil 200 is subjected to plastic deformation of the curved portions 22b and 22c. The winding state of becomes difficult to collapse. Therefore, the number of turns of the power generation coil 200 can be increased, and high output in a low-speed rotation region can be achieved by increasing the number of turns of the power generation coil 200.

  As described above, in the core sheet 100 according to the first embodiment and the second embodiment, the pair of curved portions 22b and 22c are extended at both free ends of the flange base portion 22a of the strip-shaped flange portion 22, and adjacent teeth. In the portions 2 and 2, the gap dimension S of the minimum gap portion X formed between the curved portions 22 b and 22 c facing each other is large before pressure is applied, and then a plurality of core sheets 100 are laminated. When the winding operation of the power generating coil 200 is performed on the laminated portion 300a of the strip-shaped winding portion 21 (the winding portion 300a of the stator core 300) in the fixed state, and pressure is applied after the winding operation, the curved portions 22b and 22c facing each other are applied. It is comprised so that it may become small by plastic deformation. For this reason, since the gap dimension S of the minimum gap portion X is large before the plastic deformation of the curved portions 22b and 22c, the winding of the power generating coil 200 around the laminated portion 300a of the strip-shaped winding portion 21 (the winding portion 300a of the stator core 300). When the work is performed, the conductive wire 201 is guided to the laminated part 300a of the belt-like winding part 21 (winding part 300a of the stator core 300) without interfering with the belt-like flange part 22, and a smooth winding work can be performed. It becomes. Further, since the gap dimension S of the minimum gap portion X becomes small after the plastic deformation of the curved portions 22b and 22c, the generator coil wound around the laminated portion 300a of the strip-like winding portion 21 (the winding portion 300a of the stator core 300). The 200 conductive wires 201 are difficult to pass through the minimum gap portion X. For this reason, even if the number of turns of the power generating coil 200 wound around the laminated portion 300a of the strip-shaped winding portion 21 (the winding portion 300a of the stator core 300) is increased, the power generating coil 200 is subjected to plastic deformation of the curved portions 22b and 22c. The winding state of becomes difficult to collapse. Therefore, the number of turns of the power generation coil 200 can be increased, and high output in a low-speed rotation region can be achieved by increasing the number of turns of the power generation coil 200.

2 Teeth portion 21 Strip winding portion 22 Strip flange portion 22a Flange base portion 22b, 22c Bending portion 100 Core sheet 200 Generator coil 300 Stator core 300a Laminated portion of strip winding portion 21 (winding portion of stator core 300)
X Minimum gap
S Clearance dimension

Claims (3)

A core sheet comprising a hollow disk-shaped mounting base and a plurality of teeth portions extending radially from the outer circumference of the hollow disk-shaped mounting base at equal intervals in the circumferential direction, and constituting a stator core, The teeth portion includes a belt-like winding portion extending from the outer periphery of the hollow disk-like mounting base portion, and a belt-like flange extending at the tip of the belt-like winding portion so as to be substantially orthogonal to the longitudinal direction of the belt-like winding portion. In the core sheet composed of
The strip-shaped flange portion extends along the short direction of the strip-shaped winding portion from the flange base portion corresponding to the virtual extension portion in the longitudinal direction of the strip-shaped winding portion and both free ends of the flange base portion, and from the outside. It is composed of a pair of curved portions that can be plastically deformed by applied pressure,
In adjacent teeth portions, the gap size of the smallest gap portion formed between the curved portions facing each other is large before applying the pressing force, and then, in a state where a plurality of core sheets are laminated and fixed A core sheet characterized in that, when a winding operation of a power generating coil is performed on a laminated portion of a belt-shaped winding portion and the pressing force is applied after the winding operation is completed, the core sheet is reduced by plastic deformation of curved portions facing each other.   Each of the curved parts constituting the pair of curved parts extends from the free end of the flange base so as to be located on a virtual plane flush with the belt-like winding part, and the hollow disc as it goes to the tip The core sheet according to claim 1, wherein the core sheet is configured to increase in a degree of curvature in a direction away from the shape mounting base, and is configured to be plastically deformed from a curved state to a linear state by the applied pressure.   Each of the curved portions constituting the pair of curved portions extends from the free end of the flange base portion in the short direction of the strip-shaped winding portion, and the degree of curvature increases in the direction of returning to the flange base portion toward the tip. The core sheet according to claim 1, wherein the core sheet is configured to be plastically deformed from a curved state to a linear state by the applied pressure.

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