JP2012231669A - Coil mechanism of rotary motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coil mechanism of a rotary motor that a coil having a strand arrayed and wound is mounted around a salient pole of a stator and the output of the rotary motor is increased.SOLUTION: There is provided the coil mechanism of the rotary motor including coils formed by winding strands around a cover member made of an insulating material keeping a state of insulation from the stator and mounted around respective salient poles of the stator via the cover member, and the cover member is constituted as an annular structure formed by coupling a plurality of bobbins 2 for mounting the coils around the respective salient poles of the stator. Each bobbin 2 includes a plurality of cylindrical parts 22 individually covering surfaces of the salient poles while the strands are wound, and flanges 24i, 24o projecting inner and outer-diameter ends 22i, 22o of the cylindrical part 22. The cylindrical part 22 of the bobbin 2 is provided with plate members 4 independent of the bobbin 2 at both ends in a rotary shaft direction, and the plate member 4 has a plurality of groove parts 4a, 4b, and 4c for guiding and arraying the strands formed along a winding direction of the strands when the strands are wound.

Description

  The present invention relates to an improvement in a coil mechanism of a rotary motor in which a stator has a plurality of salient poles and a coil is wound around the salient poles.

  For example, such a coil mechanism is formed of an insulating cover for covering a stator by forming an insulating material such as synthetic resin in an annular shape and a coil wound around the insulating cover. The insulating cover is configured as an annular structure in which a plurality of bobbins for winding a coil around each salient pole of the stator are connected, and each bobbin has a wire wound around it. From a plurality of cylindrical portions individually covering the surface of each salient pole, a flange projecting from the inner and outer diameter end portions of the cylindrical portion to both sides in the rotation axis direction of the rotary motor, and an outer diameter end portion of the cylindrical portion The collar part which protrudes to the both sides of the circumferential direction is provided. Each bobbin forms an annular structure (that is, an insulating cover) by connecting the inner diameter sides of the cylindrical portions to each other.

  In this case, the coil is formed by winding a plurality of layers of wires on each bobbin of the insulating cover in a plurality of rows, and is accommodated in a space (slot) sandwiched between adjacent salient poles via the bobbin. Has been. Since the output of the rotary motor increases as the number of windings of the coil accommodated in the slot increases, when forming a coil to accommodate more windings in a limited slot, the element at the time of winding It is preferable to prevent the deviation and breakage of the wire and to wind the wires in a fixed position as much as possible. In other words, when the coil is formed, if the displacement or collapse of the wire occurs, the number of windings of the coil inevitably decreases, and the number of windings of the coil accommodated in the slot decreases, leading to a decrease in the output of the rotary motor. It becomes.

  Winding work at the time of coil formation is performed by winding an element wire around a bobbin by an automatic winding machine. Generally, in order to increase the production efficiency, the element wire is slotted at a high speed. The coil is formed by being wound into the inside (that is, between the salient poles of the stator) and wound around a region from the flange on one end side in the radial direction to the flange on the other end side with respect to the cylindrical portion of the bobbin. . As an example, in the case of an outer-type stator, the strand is dropped at a high speed from the outside of the cylindrical portion, and is wound for each layer from the outside with respect to the cylindrical portion. A force to spread outward acts on the strands, and the strands once wound are likely to shift or collapse.

  Therefore, conventionally, various measures have been taken to prevent the displacement and collapse of the strands when forming such a coil. For example, Patent Document 1 discloses an insulating cover (specifically, Coil mechanism that ensures the alignment of the coil by providing a plurality of grooves (hereinafter referred to as guide grooves) for guiding the wire when winding the wire on the surface of the bobbin tubular portion) The structure of the stator is disclosed as an example.

  By the way, as described above, in order to increase the output of the rotary motor, it is preferable to accommodate a coil in which as many strands as possible are wound in the slot, and it is necessary to reduce the interval between adjacent strands as much as possible. There is. Here, when the coil is formed by the automatic winding machine, the wire that is dropped into the bobbin and wound may be deformed depending on the winding condition during the winding operation. The amount of deformation is approximately 3 to 10% although it varies depending on the type of wire. In addition, the strands themselves have a variation in diameter of about ± 10% in a commercially available product.

  Therefore, by considering the amount of deformation and setting the groove spacing of the guide grooves to an optimum width, when winding the strands, the strands fly into the adjacent guide grooves (so-called misalignment). ), Or collapse of the higher-layer wires, and a coil in which more wires are wound can be formed.

  The deformation that occurs in the wire during the winding operation as described above is the shape of the slot that accommodates the wound coil, the height of the stator (the thickness of the salient poles), the shape of the bobbin (insulating cover), or the wire. Since various conditions and factors such as the line type are superimposed, it is not easy to set the guide grooves in an optimal shape (specifically, an optimal groove interval) by desktop calculation in advance. For example, prepare a large number of bobbins (insulation covers) that have various possible shapes, interrupt the winding work if necessary, and select the optimal bobbin (insulation cover), or the actual deformation state Accordingly, it is possible to form a coil around which more strands are wound by appropriately modifying the guide groove into an optimal shape (specifically, an optimal groove interval). However, there is a limit to implementation in consideration of the manufacturing cost and manufacturing period of a mold for forming a large variety of bobbins (insulating covers) in large quantities.

  For this reason, for example, in Patent Document 2, an adhesive is applied to the surface of an insulating cover (specifically, a cylindrical portion of a bobbin), and a guide groove is simply formed with the adhesive. A method and a configuration of a coil mechanism (stator) according to the method are disclosed as an example.

Japanese Patent No. 2975902 JP-A-10-174378

However, when the guide groove is simply formed with an adhesive, there is a limit to making a complicated shape from the characteristics of the adhesive. In addition, when the guide groove made of adhesive and the bobbin (insulating cover) made of resin differ in material, the guide groove itself may be deformed or the form accuracy (shape accuracy and dimensional accuracy) cannot be secured sufficiently. Alternatively, the guide groove itself may become defective due to insufficient filling of the adhesive.
Therefore, it is not easy to configure an insulating cover in which each bobbin is provided with a guide groove having the same shape and the same size, and as a result, a plurality of salient poles (specifically, bobbins) of the stator are not covered. It becomes very difficult to wind a coil having the same configuration in which the wires are wound in an aligned state.

  The present invention has been made in order to solve such a problem, and an object of the present invention is to easily provide a coil in which strands are wound around a plurality of salient poles (specifically, bobbins) of a stator. An object of the present invention is to provide a coil mechanism for a rotary motor that can be wound to increase the output of the rotary motor.

In order to achieve such an object, the coil mechanism of the rotary electric motor according to the present invention is incorporated in the rotary electric motor in order to maintain an insulation state with the annular stator provided with a plurality of salient poles protruding in the radial direction. A cover member made of an insulating material attached to the stator, and a coil formed by winding a wire around the cover member and wound around each salient pole of the stator via the cover member. ing. In such a coil mechanism, the cover member is configured as an annular structure in which a plurality of bobbins for winding a coil around each salient pole of the stator are connected, and each bobbin is wound with the wire. A plurality of cylindrical portions that individually cover the surfaces of the salient poles, and flanges that protrude from the inner and outer diameter end portions of the cylindrical portions to both sides in the rotational axis direction of the rotary electric motor. The cylindrical portion of the bobbin is provided with a plate member that is separate from the bobbin at both ends in the rotational axis direction, and the coil wire is wound around the plate member. A plurality of grooves for guiding and aligning the strands are formed along the winding direction of the strands.
According to such a configuration, it is possible to easily wind the coil while being aligned with a plurality of salient poles (specifically, bobbins) of the stator, and to increase the output of the rotary motor.

In this case, the plate member is provided with a radial fixing portion for engaging with the flange of the bobbin and positioning in the radial direction, and the end surface of the cylindrical portion of the bobbin in the rotational axis direction. A circumferential fixing portion for engaging and positioning in the circumferential direction is provided.
Accordingly, the plate member can be easily positioned in both the radial direction and the circumferential direction with respect to the cylindrical portion of the bobbin, and can be stably fixed to the cylindrical portion. As a result, the posture of the plate member during the winding operation is stabilized, and the winding operation can be performed smoothly.

Further, the plate member is provided with grooves on the plane opposite to the plane that engages with the cylindrical portion of the bobbin, and on both sides that are continuous with the plane along the winding direction of the element wire. The groove portion is formed between the convex projections by arranging a plurality of convex projections that form a straight line along the winding direction at equal intervals with respect to the plane and both side surfaces. Are configured as a plurality of grooves.
Accordingly, the groove portion can be easily formed on the plate member, and the strands constituting the coil can be easily aligned by dropping and winding the strand in the groove of the groove portion. As a result, the number of windings per unit of the coil accommodated in the slot can be increased, and the output of the rotary motor can be increased.

In addition, it is preferable that the flat surface and both side surfaces of the plate member are continuously curved. As a result, the wire is wound in the state where the plate member is attached to the cylindrical portion of the bobbin, and when the coil is formed, the wire is wound at the shoulder portion of the plate member (the continuous portion between the flat surface and both side surfaces). The element wire does not interfere with the plate member, and the tension at the time of winding does not concentrate on the shoulder portion, which can be effectively distributed over the entire plane. As a result, the winding operation can be performed smoothly and the deformation of the wire during the winding operation can be effectively suppressed.
The plate member may be made of an insulating material. Thereby, even if it is a case where a plate member is attached to the cylindrical part of a bobbin, an insulation state with a stator can be maintained.

  According to the coil mechanism of the rotary motor of the present invention, it is possible to easily wind the coil while being aligned with a plurality of salient poles (specifically, bobbins) of the stator to increase the output of the rotary motor. it can.

It is a diagram showing a configuration of a coil mechanism of a rotary motor according to an embodiment of the present invention, (a) is a perspective view showing a bobbin (bobbin constituent body) attached with a plate from the inner diameter side, (b), The perspective view which shows the bobbin (bobbin structure) which attached the plate from the outer diameter side. It is a diagram showing the configuration of the plate in the coil mechanism of the rotary electric motor according to one embodiment of the present invention, (a) is a plan view seen from the plate surface side, (b) is the outer diameter side (same figure ( a) end view as seen from the direction of arrow b2), (c) is a side view as seen from the direction of arrow c2 in FIG. 11 (a), and (d) is a d2-d2 line in FIG. FIG. It is a figure which shows the structure of the plate in the coil mechanism of the rotary electric motor which concerns on one Embodiment of this invention, Comprising: (a) is the whole perspective view seen from the plate surface side, (b) is seen from the plate back surface side FIG. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure for demonstrating the formation method of the coil in the coil mechanism of the rotary electric motor which concerns on one Embodiment of this invention, (a) is principal part sectional drawing which shows the winding state of the strand of a coil end part, (b) is a figure for demonstrating the alignment state of the strand in a plate surface groove part, (c) is a figure for demonstrating the alignment state of the strand in a plate side surface groove part. It is a figure which shows the structure of the metal mold | die for shape | molding the plate in the coil mechanism of the rotary electric motor which concerns on one Embodiment of this invention, Comprising: (a) is a principal part block diagram for demonstrating a division structure, (b) ) Is a conceptual diagram for explaining a molding method of a surface groove part (convex protrusion) molding part of a surface groove mold.

Hereinafter, a coil mechanism of a rotary motor according to an embodiment of the present invention will be described with reference to the accompanying drawings.
1 to 4 show a coil mechanism (hereinafter simply referred to as a coil mechanism) of a rotary motor according to the present embodiment. The coil mechanism is incorporated in a rotary motor (not shown) and protrudes in the radial direction. A cover member (not shown) made of an insulating material to be attached to the stator in order to maintain an insulation state with an annular stator (not shown) provided with a plurality of salient poles (not shown). A coil C is formed by winding the element wire 10 and is wound around each salient pole of the stator via the cover member.

  The cover member is configured as an annular structure in which a plurality of bobbins 2 for winding the coil C around each salient pole of the stator are connected, and each bobbin 2 is in a state in which the wire 10 is wound. And a plurality of cylindrical portions 22 that individually cover the surface of each salient pole of the stator, and inner and outer diameter end portions 22i and 22o of the cylindrical portion 22 in the rotational axis direction (hereinafter referred to as the axial direction) of the rotary motor. It has flanges 24i and 24o protruding to both sides. In this case, each bobbin 2 has a structure in which a pair of bobbin constituting bodies 2a divided at intermediate positions in the axial direction are assembled from both sides in the axial direction, and the plurality of bobbin constituting bodies 2a are cylinders. By connecting the inner diameter side 22i of the shaped portion 22 to each other to form an annular structure (hereinafter referred to as a divided structure), and assembling the pair of divided structures so as to sandwich the stator from both sides in the axial direction, A cover member is configured.

  As a result, the cover member is mounted on the stator, and the surface of each salient pole of the stator is individually covered by the cylindrical portion 22. At that time, the size and shape of each bobbin 2 (cylindrical portion 22) is relatively dependent on the size and shape of the stator (saliency pole) so that the surface of the stator (saliency pole) can be covered. Should be set. Further, the number of bobbins 2 constituting the cover member is set to be equal to or greater than the number of salient poles of the stator on which the cover member is mounted, and the predetermined number of bobbins 2 are arranged on each salient pole with respect to the axis of the rotating shaft. May be arranged along the circumferential direction of the cover member so as to have the same phase as that of the cover member.

  The cylindrical portion 22 of the bobbin 2 is provided with a plate member (hereinafter referred to as a plate) 4 that is separate from the bobbin 2 at both ends in the axial direction. When the wire 10 is wound, a plurality of grooves 4a, 4b, 4c for guiding and aligning the wire 10 are formed along the winding direction of the wire 10. 1 (a) and 1 (b), the plate 4 is provided (attached) to one end in the axial direction with respect to the cylindrical portion 22 of the bobbin 2 (the plate 4 is attached to the bobbin constituting body 2a). A state in which is attached).

  As shown in FIGS. 1 (a) and 1 (b), the plate 4 has a width (circumferential dimension (vertical distance in FIG. 2 (a)) in the axial direction of the cylindrical portion 22 of the bobbin 2 ( (Hereinafter referred to as the plate mounting surface) is set to be approximately the same as the width dimension, and its length (the radial dimension (the distance in the horizontal direction in the figure)) protrudes from the bobbin 2 to the same axial direction. The distance between the two flanges 24i and 24o is set to be approximately the same as the distance between the two flanges 24i and 24o, and the shape substantially conforms to the contour shape of the plate mounting surface.

The plate width is preferably set to be equal to or less than the width dimension (circumferential distance) of the plate mounting surface as described above. That is, when the plate width is set to be larger than the width of the plate mounting surface, the wire 10 is wound with the plate 4 attached to the cylindrical portion 22 of the bobbin 2 as described later, and the coil C is When forming (see FIGS. 4A to 4C), the coil width is increased by the plate width, the winding distance of the coil C is increased, and the resistance value of the coil is increased. Further, in this case, a step due to the width difference between the plate 4 and the plate mounting surface is generated, and the plate 4 is easily displaced when the coil C is formed, and the shape stability of the coil C is impaired.
Therefore, by setting the width of the plate 4 to be equal to or less than the width dimension of the plate mounting surface, it is possible to effectively suppress an increase in coil resistance and to stabilize the posture of the plate 4. The shape stability of the coil C can be maintained.

  Further, the plate 4 is sandwiched between the two flanges 24i and 24o by setting the plate length to be approximately the same as the distance between the two flanges 24i and 24o protruding from the bobbin 2 to the same axial direction. In this state, it can be stably attached to the plate mounting surface.

  The plate 4 is provided with radial fixing portions 6i and 6o for engaging with the flanges 24i and 24o of the bobbin 2 to be positioned in the radial direction, and engaging with the plate arrangement surface of the bobbin 2. Thus, a circumferential fixing portion 8 for positioning in the circumferential direction is provided, so that the plate 4 is positioned so as to cover the entire plate mounting surface.

  In the configuration shown in FIGS. 2 and 3, of the radial fixing portions 6i and 6o provided at both ends in the radial direction, the radial fixing portion on one end side (the right end side in FIG. 2A, that is, the inner diameter side). 6i is formed as a flat surface having one end side of the plate 4 parallel to the base end portion 34i of the flange 24i, whereas the diameter on the other end side (the left end side, ie, the outer diameter side). The direction fixing portion 6o is formed as a notch formed by missing the other end side of the plate 4 into a shape along the outline of the proximal end portion 34o of the flange 24o.

  In this case, the flange 24i on one end side has a rectangular parallelepiped shape in which the width (distance in the circumferential direction) is set to be substantially the same as the width dimension of the plate mounting surface, and the inner diameter end portion of the cylindrical portion 22 The base end portion 34i of the flange 24i is configured to have a flat surface portion facing the radial fixing portion 6i of the plate 4. Further, the flange 24o on the other end side has a width (circumferential distance) set to a dimension slightly smaller than the width dimension of the plate mounting surface, and the tubular portion so that the flange 24o spreads toward the bottom. The base end portion 34o that protrudes from the outer diameter end portion 22o of the flange 22 and corresponds to the flared portion of the flange 24o extends toward the one end side in a gently sloping curved surface, and toward the plate mounting surface of the cylindrical portion 22. It has a continuous configuration.

  On the other hand, as shown in FIGS. 2 and 3, the circumferential fixing portion 8 is an engagement surface of the plate 4 with respect to the plate arrangement surface of the cylindrical portion 22 (the left surface of FIG. It is formed as a groove formed by recessing 4p in a straight line.

  In this case, on the plate disposition surface of the bobbin 2 (cylindrical portion 22), a projecting portion that protrudes in a substantially rectangular shape with a cross-sectional shape continuous from one end side to the other end side in the radial direction ( (Not shown) is provided, and the plate back surface 4p has a series of substantially rectangular cross-sectional shapes along the outline of the protruding portion of the plate mounting surface from one end side to the other end side in the radial direction. A groove is formed to constitute the circumferential fixing portion 8. As an example, as shown in FIG. 2B, chamfering is applied to the corners of the groove bottom and the shoulders of the circumferentially fixed portion 8, and the plate 4 is disposed by chamfering. When attaching to a surface, the circumferential direction fixing | fixed part 8 of the plate back surface 4p can be smoothly engaged with the protrusion part of the said plate arrangement | positioning surface.

  When attaching the plate 4 provided with the radial direction fixing portions 6i, 6o and the circumferential direction fixing portion 8 to the cylindrical portion 22 (specifically, the plate disposition surface) of the bobbin 2, first, The radial fixing portion 6o (notch) is engaged with the tip portion of the flange 24o, and the radial fixing portion 6o (flat surface) is brought into contact with the tip portion of the flange 24i. In this state, since the radial fixing portion 6o (notch) is engaged with the tip portion of the flange 24o, the plate 4 can be positioned in the radial direction.

  Next, in this state, the plate 6 is pushed along the flanges 24i, 24o (that is, using the flanges 24i, 24o as guides) toward the plate arrangement surface of the cylindrical portion 22, and the circumferential direction of the plate back surface 4p The fixing portion 8 (groove) is engaged with the protruding portion of the plate mounting surface. Then, the plate 6 is further pushed in the plate arrangement surface direction so that the plate back surface 4p is brought into close contact with the plate arrangement surface, and the circumferential direction fixing portion 8 is completely engaged with the protruding portion. In this state, since the circumferential fixing portion 8 (groove) is completely engaged with the protruding portion of the plate mounting surface, the plate 4 can be positioned in the circumferential direction.

  Accordingly, the plate 4 can be positioned in both the radial direction and the circumferential direction with respect to the plate arrangement surface, and can be stably fixed to the plate arrangement surface. As a result, the plate 4 is formed on the plate 4. The groove portions 4a, 4b, 4c are easily positioned with respect to the cylindrical portion 22 of the bobbin 2.

  Here, the size and shape of the radial direction fixing parts 6i, 6o and the circumferential direction fixing part 8 can position and fix the plate 4 with respect to the cylindrical part 22 of the bobbin 2 in the radial direction and the circumferential direction. There is no particular limitation as long as it is set, and it may be arbitrarily set according to the size of the bobbin 2 (the cylindrical portion 22 and the plate mounting surface) on which the plate 4 is disposed or the shapes of the flanges 24i and 24o. For example, the radial fixing part 6i may be formed as a notch and the radial fixing part 6o may be formed as a flat surface. In addition, rod-shaped protrusions are provided at predetermined intervals (for example, at equal intervals) along the radial direction on the plate mounting surface, and the engagement holes for accommodating the rod-shaped protrusions on the plate back surface 4p as the circumferential fixing portion 8 May be arranged at the same intervals as the rod-shaped protrusions.

  Further, the plate 4 has a plane (hereinafter referred to as a plate surface) 4q on the side opposite to the plate back surface 4p (right side in FIG. 2B), and the winding direction of the plate surface 4q and the strand 10. Grooves 4a, 4b, and 4c are formed in continuous side surfaces (hereinafter referred to as plate side surfaces) 4s and 4t, respectively.

In the configuration shown in FIG. 2 and FIG. 3, the groove 4a (hereinafter referred to as the following) is provided at the intermediate position in the circumferential direction (vertical direction in FIG. 2) of the plate surface 4q. Surface groove 4a) is formed. In this case, one end side (inner diameter side (right end side in FIG. 2A)) of the surface groove 4a is continuous with the radial fixing portion 6i of the plate 4, and the other end side (outer diameter side (same figure)). The left end side) of the plate 4 is continuous with the radial fixing portion 6o of the plate 4, and its length corresponds to the shortest distance between the radial fixing portion 6i and the radial fixing portion 6o. Further, the width of the surface groove 4a (the distance in the vertical direction in FIG. 2) is set smaller than the width dimension of the radial fixing portion 6o of the plate 4.
Further, the plate side surfaces 4s, 4t have groove portions 4b, 4c (hereinafter referred to as side surface groove portions 4b, 4c) whose length (distance in the left-right direction in FIG. 2) is set to the same dimension as the length of the surface groove portion 4a. The side groove portions 4b and 4c are positioned so as to have the same phase as the surface groove portion 4a with respect to the radial direction of the plate 4 (left and right direction in the figure).

  The plate 4 is inclined such that the plate surface 4q has a descending gradient from the surface groove 4a toward the plate side surfaces 4s and 4t, with the surface groove 4a as the top, and gradually becomes the plate side surfaces 4s and 4t. It is configured to be continuous in a curved shape (so-called R shape having a predetermined curvature). As a result, as described later, when the wire 10 is wound with the plate 4 attached to the cylindrical portion 22 of the bobbin 2 to form the coil C (see FIGS. 4A to 4C), the plate The wound wire 10 does not interfere with the plate 4 at the shoulder portion of the surface 4q (continuous portion with the plate side surfaces 4s and 4t). For this reason, the tension at the time of winding does not concentrate on the shoulder portion, but can be effectively distributed over the entire plate surface 4q. As a result, the winding operation can be performed smoothly, and the deformation of the wire 10 during the winding operation can be effectively suppressed.

  As shown in FIGS. 2 and 3, the surface groove portion 4 a is formed by arranging a plurality of convex protrusions 4 u that form a straight line along the winding direction of the element wire 10 at equal intervals with respect to the plate surface 4 q. It is configured as a plurality of grooves 4x formed between the convex protrusions 4u. Similarly, the side groove portions 4b and 4c are formed by arranging a plurality of convex protrusions 4v and 4w that form a straight line along the winding direction of the element wire 10 at equal intervals with respect to the plate side surfaces 4s and 4t. It is configured as a plurality of grooves 4y, 4z formed between the convex protrusions 4v, 4w. By forming the surface groove portion 4a and the side surface groove portions 4b and 4c in such a configuration, the plate surface 4q and the plate side surfaces 4s and 4t can be easily formed.

In this case, the convex protrusions 4u on the plate surface 4q and the convex protrusions 4v, 4w on the plate side surfaces 4s, 4t are all the same size, shape, and the same interval (same pitch), and the same number. Is formed. Thereby, the convex protrusions 4u on the plate surface 4q and the convex protrusions 4v, 4w on the plate side surfaces 4s, 4t can be arranged at equal intervals in the winding direction of the strand 10. That is, the grooves 4z of the surface groove 4a and the grooves 4y and 4z of the side surface grooves 4b and 4c can be arranged at equal intervals with respect to the winding direction of the strand 10.
Thus, when the wire 10 is wound with the plate 4 attached to the cylindrical portion 22 of the bobbin 2 to form the coil C as described later (see FIGS. 4A to 4C), The groove 4x of the surface groove portion 4a and the grooves 4y and 4z of the side surface groove portions 4b and 4c positioned in the same phase with respect to the winding direction are connected from one end side to the other end side (for example, from the inner diameter side to the outer diameter side (FIG. 2 ( By dropping the wire 10 from the right end side of a) to the left end side)), the wire 10 can be aligned and wound.

  The size (dimensions) and shape of the convex protrusions 4u on the plate surface 4q and the convex protrusions 4v, 4w on the plate side surfaces 4s, 4t, that is, the grooves 4x on the surface groove portion 4a and the grooves 4y, 4z on the side surface groove portions 4b, 4c. Alternatively, the interval and the number may be arbitrarily set according to the size of the plate 4 or the diameter and type of the wire 10 wound around the cylindrical portion 22 of the bobbin 2 via the plate 4. Therefore, there is no particular limitation here. For example, the contour shapes of the cross-sections of the convex protrusions 4u on the plate surface 4q and the convex protrusions 4v, 4w on the plate side surfaces 4s, 4t are curved as shown in FIGS. 2 and 3 (for example, a parabolic curve). There may be various shapes such as a triangular shape, a trapezoidal shape, a rectangular shape, a semicircular shape, a semielliptical shape, or a shape in which the ridge line portion of the trapezoid is a concave curve shape.

  Here, the formation positions of the convex protrusions 4v and 4w on the plate side surfaces 4s and 4t with respect to the thickness direction of the plate 4 (vertical direction in FIG. 2C) are the end surfaces of the side surface groove portions 4b and 4c on the plate surface 4q side ( That is, the same end surfaces 4e and 4f of the convex protrusions 4v and 4w are the same height as the plate back surface 4p in the thickness direction of the plate 4 (that is, the end surfaces 4e and 4f and the plate back surface 4p are flush with each other). It is preferable to set so as to be equivalent). As a result, as will be described later, when the element wire 10 is wound with the plate 4 attached to the cylindrical portion 22 of the bobbin 2 to form the coil C (see FIGS. 4A to 4C), the side surface It effectively prevents the wire 10 wound around the grooves 4y and 4z of the grooves 4b and 4c from protruding excessively beyond the plate width and increasing the winding distance of the coil C (particularly the coil end portion). As a result, it is possible to avoid an increase in the resistance value of the coil.

  At that time, the side groove portions 4b and 4c (the convex projections 4v and 4w of the plate side surfaces 4s and 4t) and the plate back surface 4p are formed by a chamfered portion 12 as shown in FIG. What is necessary is just to make it the structure continued in a shape (what is called R shape which has a predetermined curvature).

  As a result, the end surfaces of the side surface grooves 4b and 4c on the plate surface 4q side (that is, the same end surfaces of the convex protrusions 4v and 4w) 4e and 4f are the same as the plate back surface 4p in the thickness direction of the plate 4 The height (that is, the end surfaces 4e and 4f and the plate back surface 4p correspond to the same surface) can be set, and the plate 4 can be configured to suppress the resistance value of the coil C as described above. Further, the strength of the continuous portion between the side groove portions 4b, 4c (the convex protrusions 4v, 4w of the plate side surfaces 4s, 4t) and the plate back surface 4p can be increased by the chamfered portion 12, and as a result, the side groove portions 4b, 4c ( The strength, that is, the durability of the convex protrusions 4v, 4w) on the plate side surfaces 4s, 4t can be remarkably increased. As a result, when the wire 10 is wound around the cylindrical portion 22 to which the plate 4 is attached (when the coil C is formed), the force applied from the winding can be reliably loaded, and the winding work can be performed. It becomes possible to carry out stably.

  Further, the side groove portions 4b, 4c (convex projections 4v, 4w of the plate side surfaces 4s, 4t) are continuously provided on the plate back surface 4p by providing the chamfered portion 12 in this manner, thereby providing the side groove portions 4b, 4c. If the end surfaces 4e, 4f and the plate back surface 4p can be made to have the same height, a mold for molding the plate 4 described later can be easily divided, and the molding accuracy of the mold can be increased. Thereby, not only can the plate 4 be molded easily, but also the form accuracy of the side groove portions 4b, 4c (the convex projections 4v, 4w of the plate side surfaces 4s, 4t) of the plate 4 molded by the mold ( (Shape accuracy and dimensional accuracy) can be improved, and such accuracy can be maintained over a long period of time.

  Here, in the present embodiment described above, the material of the plate 4 is not particularly mentioned, but may be made of various insulating materials, specifically, made of the same material as the various bobbins 2. For example, the plate 4 can be made of the same resin as the bobbin 2 to which it is attached. Thus, by making the plate 4 made of the same resin as the bobbin 2, even when the plate 4 is attached to the cylindrical portion 22 of the bobbin 2, it is possible to maintain the insulation state with the stator. It is also possible to reduce material procurement costs.

It should be noted that the plate 4 is formed, the radial direction fixing portions 6i, 6o and the circumferential direction fixing portion 8 are formed, the groove 4x of the surface groove portion 4a and the grooves 4y, 4z of the side surface groove portions 4b, 4c (the convexity of the plate surface 4p). The projection 4u and the convex projections 4v, 4w) of the plate side surfaces 4s, 4t may be formed by selecting an arbitrary method according to the material of the plate 4 and the like.
For example, when the plate 4 is made of resin, the plate 4 may be formed by pressing a resin material poured into the mold using a predetermined mold. In this case, the groove 4x of the surface groove portion 4a and the grooves 4y and 4z of the side surface groove portions 4b and 4c (the convex protrusions 4u on the plate surface 4p and the convex protrusions 4v on the plate side surfaces 4s and 4t, simultaneously with the molding of the plate 4). 4w) can be formed.

Further, the resin plate 4 may be formed by optical modeling. In this case, the plate 4, the groove 4x of the surface groove portion 4a, and the grooves 4y and 4z of the side surface groove portions 4b and 4c (the convex protrusions 4u on the plate surface 4p and the convex protrusions 4v and 4w on the plate side surfaces 4s and 4t) are simplified. ) Can be formed simultaneously.
Alternatively, after the plate 4 is formed by various methods, the formed plate 4 is subjected to a cutting process or the like, so that the groove 4x of the surface groove portion 4a and the grooves 4y and 4z of the side surface groove portions 4b and 4c (plate Convex protrusions 4u on the surface 4p and convex protrusions 4v, 4w) on the plate side surfaces 4s, 4t may be formed.

  The plate 4 is molded, the radial direction fixing portions 6i, 6o and the circumferential direction fixing portion 8 are molded, the groove 4x of the surface groove portion 4a and the grooves 4y, 4z of the side surface groove portions 4b, 4c (the convex protrusion 4u on the plate surface 4p). When the projections 4v and 4w) of the plate side surfaces 4s and 4t are formed using a mold, the mold is preferably divided as shown in FIGS. 5 (a) and 5 (b). .

  5 (a) and 5 (b), the mold 50 is an upper mold that molds the upper portion in the thickness direction of the plate 4 with the end surfaces 4e and 4f of the side groove portions 4b and 4c as boundaries. The entire plate 4 is molded by combining a 52 (hereinafter referred to as an upper mold) and a lower mold (hereinafter referred to as a lower mold) 54 for molding the lower portion.

In this case, the upper mold 52 includes a mold (hereinafter referred to as a surface groove mold) 52a for forming a groove 4x (a convex protrusion 4u on the plate surface 4p) of the surface groove 4a and a plate surface 4p portion excluding the surface groove 4a. It has a structure that can be divided into two molds (hereinafter referred to as surface molds) 52b and 52c. The lower mold 54 includes a mold (hereinafter referred to as a back mold) 54a for forming the plate back surface 4q and the circumferential fixing portion 8, and grooves 4y and 4z of the side groove portions 4b and 4c (convex projections of the plate side surfaces 4s and 4t). 4v, 4w) is divided into three molds 54b and 54c (hereinafter referred to as side surface groove molds) 54b and 54c.
The radial direction fixing portions 6i, 6o are configured to be molded by either the upper mold 52 (surface groove mold 52a, surface molds 52b, 52c) or the lower mold 54 (back surface mold 54a, side surface groove molds 54b, 54c). There may be.

  By making the mold 50 have such a divided structure, a portion for molding the groove 4x of the surface groove portion 4a (the convex protrusion 4u of the plate surface 4p) in the surface groove mold 52a can be exposed to the outside, and the side surface The portions where the grooves 4y and 4z of the side groove portions 4b and 4c (the convex protrusions 4v and 4w of the plate side surfaces 4s and 4t) are formed can be exposed to the outside in the groove molds 54b and 54c.

  Therefore, for example, as shown in FIG. 5B, the groove 4x (convex protrusion 4u) forming portion of the surface groove mold 52a and the grooves 4y, 4z (convex protrusions 4v, 4w) of the side surface groove molds 54b, 54c are formed. The molded part can be molded with high accuracy by wire cutting or the like (only the surface groove mold 52a is molded in the figure). In this case, the wire 60 is moved along the shape of the groove 4x (convex protrusion 4u) of the surface groove mold 52a and the shapes of the grooves 4y and 4z (convex protrusions 4v and 4w) of the side surface groove molds 54b and 54c. Thus, these groove 4x, 4y, 4z (convex protrusions 4x, 4y, 4w) forming portions can be formed easily and with high accuracy.

  If the mold is not divided as described above, the mold is formed by forming the groove 4x (convex protrusion 4u) of the surface groove mold 52a and the grooves 4y, 4z (protrusion) of the side surface groove molds 54b and 54c. 4v, 4w) Since the molded part enters the recessed part recessed inside the mold, these grooves 4x, 4y, 4z (convex protrusions 4x, 4y, 4w) are formed by electrical discharge machining. It will be molded by. Accordingly, the molding accuracy of the groove 4x, 4y, 4z (convex protrusion 4x, 4y, 4w) is reduced, and the groove 4x, 4y, 4z (convex protrusion 4x, 4y, 4w) formed by the mold is reduced. ) Form accuracy (shape accuracy and dimensional accuracy) is lowered.

For this reason, the mold 50 has a divided structure as shown in FIGS. 5A and 5B, so that the molding accuracy of the molded part of the grooves 4x, 4y, 4z (convex projections 4x, 4y, 4w) is remarkably increased. The shape accuracy (shape accuracy and dimensional accuracy) of the grooves 4x, 4y, 4z (convex protrusions 4x, 4y, 4w) formed by the mold 50 can be remarkably increased. The effect of improving the form accuracy of such grooves 4x, 4y, 4z (convex protrusions 4x, 4y, 4w) is such that the grooves 4x, 4y, 4z (convex protrusions 4x, 4y, 4w) to be formed become smaller. In other words, the smaller the diameter of the wire 10 wound around the plate 4 (grooves 4x, 4y, 4z), the more significant the forming merits by the mold 50 having such a divided structure become.
At that time, the grooves 4x, 4y, 4z (convex projections 4x, 4y, 4w) in the mold 50 are exposed to the outside, so the form accuracy (shape accuracy and dimensional accuracy) of the molded portion is confirmed. Can be easily performed by visual inspection or the like, and the evaluation is very easy.

  Further, by forming the mold 50 in such a divided structure, when the molding of the plate 4 is repeatedly performed, the groove 4x (convex protrusion 4u) molding portion of the surface groove mold 52a and the side groove molds 54b and 54c are formed. Even if the groove 4y, 4z (convex projection 4v, 4w) is formed by wear due to pressure during pressing, a plurality of (for example, six) molds 52a, 52b, 52c constituting the mold 50 are used. , 54a, 54b, 54c, only the surface groove mold 52a and the side groove molds 54b, 54c are replaced with new ones, and the mold 50 is assembled again, so that the grooves 4x, 4y, 4z of the plate 4 to be formed (convex) The shape of the projections 4x, 4y, 4w) can be stably maintained with high accuracy over a long period of time. Further, the mold 50 can be partially maintained as necessary, and the maintenance cost of the mold 50 can be greatly reduced.

  Thereby, the groove 4x of the surface groove portion 4a having various shapes and dimensions (the convex protrusion 4u on the plate surface 4p), and the grooves 4y and 4z of the side surface groove portions 4b and 4c (the convex protrusions 4v on the plate side surfaces 4s and 4t, The plate 4 on which 4w) is formed can be manufactured easily and in large quantities in a short period of time and at a low cost.

The position where the upper mold 52 and the lower mold 54 in the mold 50 are divided, the number of divisions, and the like are not limited to the configuration shown in FIG. 5A, and are arbitrary according to the shape of the plate 4 and the like. Should be set.
For example, the upper mold is not a completely divided structure, but a mold that molds the groove 4x of the surface groove 4a (the convex protrusion 4u of the plate surface 4p) into a mold that molds the plate surface 4p portion excluding the surface groove 4a. A structure may be combined in a nested manner. Further, the grooves 4y and 4z of the side surface groove portions 4b and 4c (the convex protrusions 4v and 4w of the plate side surfaces 4s and 4t) may be configured to be molded with an upper mold.

  The plate 4 configured as described above is attached to the cylindrical portion 22 of the bobbin 2, and in this state, the element wire 10 is wound around the groove 4x of the surface groove portion 4a and the grooves 4y and 4z of the side surface groove portions 4b and 4c. As a result, the coil C is formed. For winding work when forming the coil C, an automatic winding machine similar to the conventional one can be used. In FIGS. 4A to 4C, the strands 10 are wound in six layers. The state of the rotated coil C is shown as an example.

  As shown in FIGS. 4A to 4C, in this embodiment, since the plate 4 is attached to the cylindrical portion 22 of the bobbin 2, the lowermost strand 10a of the coil C is automatically wound. The wire machine is dropped into the grooves 4x of the surface groove 4a of the plate 4 and the grooves 4y and 4z of the side grooves 4b and 4c, and is wound. For this reason, the lowermost strand 10a is wound in a state of being aligned with the interval between the grooves 4x formed in the surface groove portion 4a and the intervals between the grooves 4y and 4z formed in the side surface groove portions 4b and 4c.

  Then, the second-layer wires 10b that overlap the lower-layer wires 10a are dropped between adjacent lower-layer wires 10a, and are wound in a state of being aligned at intervals between the adjacent wires 10a. Is done. Further, the third to sixth layers of wires 10c to 10f are similarly dropped between the adjacent wires 10 of one layer below and wound in an aligned state. 4A to 4C show the configuration of the coil C in which the strands 10 are composed of six layers as an example, the number of layers of the strands 10 forming the coils C is limited to this. Instead, the coil C may be formed by winding the wire 10 so as to have an arbitrary number of layers according to the required output of the rotary motor.

  Thus, according to the coil mechanism according to the present embodiment, by attaching the plate 4 to the cylindrical portion 22 of the bobbin 2, it is easy to wire the plurality of salient poles (specifically, bobbins) of the stator. The coils can be aligned and wound with the same accuracy, and each coil C can be formed with high accuracy. As a result, the coil C can be easily wound in a state aligned with the plurality of salient poles of the stator, the number of windings per unit of the coil C accommodated in the slot can be increased, and the output of the rotary motor can be increased. Can be achieved.

  In addition, since the plate 4 formed with the grooves 4x, 4y, 4z (convex projections 4x, 4y, 4w) having various shapes and dimensions can be manufactured easily and in large quantities in a short period of time and at a low cost, By replacing the plate 4 in accordance with the strands 10 set to various diameters and the strands 10 of each type, it is possible to form the coil C that can flexibly cope with output adjustment of the rotary motor.

2 Bobbin 4 Plates 4a, 4b, 4c Groove part 10 Wire 22 Tubular part 22i Tubular part inner diameter side end part 22o Tubular part outer diameter side end part 24i, 24o Flange C Coil

Claims (5)

A cover member made of an insulating material to be attached to the stator in order to maintain an insulation state with the annular stator provided with a plurality of salient poles protruding in the radial direction and incorporated in the rotary motor, and a wire to the cover member A coil mechanism of a rotary electric motor including a coil wound around each salient pole of the stator via the cover member,
The cover member is configured as an annular structure in which a plurality of bobbins for winding a coil to each salient pole of the stator are connected, and each bobbin has the element wire wound around the bobbin. A plurality of cylindrical portions individually covering the surfaces of the salient poles, and flanges that protrude from the inner and outer diameter end portions of the cylindrical portions to both sides in the rotational axis direction of the rotary motor,
The cylindrical portion of the bobbin is provided with a plate member that is separate from the bobbin at both ends in the rotation axis direction, and when the element wire of the coil is wound around the plate member, A coil mechanism for a rotary electric motor, wherein a plurality of grooves for guiding and aligning the strands are formed along a winding direction of the strands.   The plate member is provided with a radial fixing portion for engaging with the flange of the bobbin and positioning in the radial direction, and is engaged with the end surface of the cylindrical portion of the bobbin in the rotational axis direction. The coil mechanism of the rotary electric motor according to claim 1, further comprising a circumferential direction fixing portion for positioning in the circumferential direction.   The plate member has grooves formed on a plane opposite to the surface engaged with the cylindrical portion of the bobbin, and on both side surfaces continuous with the plane along the winding direction of the element wire. The groove portion is formed between the convex projections by arranging a plurality of convex projections that form a straight line along the winding direction at equal intervals with respect to the plane and both side surfaces. The coil mechanism of the rotary electric motor according to claim 1, wherein the coil mechanism is configured as a groove.   The coil mechanism of the rotary electric motor according to claim 3, wherein the flat surface and both side surfaces of the plate member are continuously curved.   The said plate member consists of insulating materials, The coil mechanism of the rotary electric motor in any one of Claims 1-4 characterized by the above-mentioned.

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