JP2016019416A - Rotor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotor capable of preventing a split core from being dropped from a base core, the rotor being configured by assembling the split core around which a coil is wound, with the base core.SOLUTION: In the state where a tab tail 16 is inserted into a groove 2, a split core 4 can be slid a little in a radial direction of a base core 3. Therefore, when the split core 4 is pushed in toward the inside in the radial direction of the base core 3, a state where the tab tail 16 partially protrudes from an inner peripheral surface 8a into a fitting space 8 is provided. When the tab tail 16 is pushed in toward the outside in the radial direction of the base core 3, a state where the tab tail 16 is brought into contact with a side face 2a of the groove 2 is provided. Even if the tab tail 16 is pushed in the direction of an arrow B further from such a state, since the split core 4 cannot be moved in the direction of the arrow B, the split core 4 can be prevented from being dropped from the base core 3.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a rotor, and more particularly to a rotor configured by assembling a split core around which a coil is wound to a base core.

  Patent Document 1 describes a rotor configured by assembling a magnetic pole wound with a coil (corresponding to a split core) to a cylindrical rotor rim plate (corresponding to a base core). The magnetic poles are assembled to the rotor rim plate so that trapezoidal tab tails protruding from the magnetic poles are inserted into the plurality of substantially trapezoidal grooves provided on the outer periphery of the rotor rim plate from the axial direction of the rotor rim plate. Since both the groove and the tab tail have a trapezoidal shape, even if the magnetic pole is pulled outward in the radial direction of the rotor rim plate, the tab tail is caught by the inner wall of the groove and the magnetic pole cannot be removed from the rotor rim plate. With such a configuration, even if centrifugal force is applied to the magnetic poles during rotation of the rotor, the magnetic poles do not come off from the rotor rim plate.

JP-A-3-143236 (FIG. 3)

  However, in the rotor described in Patent Document 1, in order to fix each magnetic pole to the rotor rim plate, a magnetic pole key is struck in the gap between the tab tail and the inner wall of the groove, and the magnetic pole is directed radially outward of the rotor rim plate. It is necessary to press. Since this operation needs to be performed in each groove, there is a problem that it is very time-consuming.

  The present invention has been made to solve such problems, and in a rotor configured by assembling a split core around which a coil is wound to a base core, a rotor capable of preventing the split core from coming off from the base core is provided. The purpose is to provide.

A rotor according to the present invention includes a cylindrical base core having at least one groove and a fitting space in which a rotary shaft member is fitted, and at least one division having a tab tail insertable into the groove and wound with a coil. And the groove is formed so as to extend from the outer peripheral surface of the base core to the inner peripheral surface of the fitting space, and the split core is moved radially outward of the base core with the tab tail inserted into the groove. Sometimes when the tab tail comes into contact with the stop surface to stop the movement of the split core and the split core is moved inward in the radial direction of the base core with the tab tail inserted into the groove, a part of the tab tail becomes the inner peripheral surface. When the rotary shaft member is inserted into the fitting space and inserted into the fitting space, the rotary shaft member pushes a part of the tab tail protruding into the fitting space toward the outer side in the radial direction of the base core.
The stop surface is two side surfaces facing each other, and the distance between the two side surfaces may decrease in a tapered manner from the inner peripheral surface toward the outer peripheral surface.
The rotating shaft member is provided on the rotating shaft and a disk member that pushes a part of the tab tail protruding into the fitting space toward the outer side in the radial direction of the base core when inserted into the fitting space. And the outer diameter of the disk member may decrease in a tapered shape in the direction of insertion into the fitting space.
The split core includes a winding portion around which the coil is wound. The winding portion is located radially outside the tab core with the tab tail inserted into the groove, and extends in the radial direction of the base core. In the section, the number of turns of the coil may increase as the distance from the tab tail increases.

  According to the present invention, in the rotor configured by assembling the split core around which the coil is wound to the base core, the groove formed in the base core extends from the outer peripheral surface of the base core to the inner peripheral surface of the fitting space. And when the split core is moved radially outward of the base core with the tab tail of the split core inserted into the groove, the tab tail comes into contact with the stop surface to stop the split core from moving. It is possible to prevent the split core from coming off from the core.

It is a top view of the rotor which concerns on embodiment of this invention. It is the top view and sectional drawing of the base core of the rotor which concern on this embodiment. It is a top view of the split core of the rotor which concerns on this embodiment. In the rotor which concerns on this embodiment, it is the elements on larger scale for demonstrating the procedure which incorporates a split core in a base core. It is a side view of the rotating shaft member combined with the rotor which concerns on this embodiment. It is a top view of the modification of the groove | channel and division | segmentation core which were formed in the base core of the rotor which concerns on this embodiment. It is a top view of another modification of the division | segmentation core of the rotor which concerns on this embodiment.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
As shown in FIG. 1, the rotor 1 includes a cylindrical base core 3 in which a plurality of grooves 2 are formed at intervals in the circumferential direction, and a plurality of divided cores 4 incorporated in each groove 2. I have. A rotating shaft member 5 is fitted to the base core 3. The rotating shaft member 5 includes a rotating shaft 6 and a disk-shaped disk member 7 provided on the rotating shaft 6. The disc member 7 is made of a magnetic material. The base core 3 may be manufactured by laminating electromagnetic steel plates, or may be integrally formed with a mold or the like.

  As shown in FIG. 2A, the base core 3 is formed with a fitting space 8 that is recessed in a cylindrical shape with respect to the end surface 3 a of the base core 3 so as to be surrounded by the plurality of grooves 2. The rotary shaft member 5 (see FIG. 1) is fitted into the fitting space 8. A circular shaft hole 9 into which the rotating shaft 6 (see FIG. 1) is inserted is formed in the base core 3 so as to communicate with the fitting space 8 in the central portion thereof. Each groove 2 has two side surfaces 2a and 2a facing each other, and the distance between the two side surfaces 2a and 2a is tapered from the inner peripheral surface 8a of the fitting space 8 toward the outer peripheral surface 3c of the base core 3. Has decreased. Each groove 2 is opened in each of the inner peripheral surface 8a and the outer peripheral surface 3c. As shown in FIG. 2B, each groove 2 has a shape that is recessed with respect to the end surface 3 a and is not open to the other end surface 3 b of the base core 3.

  As shown in FIG. 3, the split core 4 includes a main body part 11, a bobbin 12 that is a rectangular parallelepiped and cylindrical winding part attached to the main body part 11, and a coil 13 wound around the outer periphery of the bobbin 12. And have. The main body 11 includes a rectangular parallelepiped mounting part 14 inserted into the bobbin 12, a rectangular plate-shaped retaining part 15 provided at one end of the mounting part 14, and a tab tail 16 provided at the other end of the mounting part 14. And have. The length of the tab tail 16 in a direction perpendicular to the longitudinal direction (the width of the tab tail 16) increases in a tapered shape from one end connected to the mounting portion 14 to the other end. (Plan view) It has a trapezoidal shape. The main body 11 is formed by laminating a plurality of plate-shaped electromagnetic steel plates that combine a rectangular shape and a trapezoidal shape, and the mounting portion 14 is formed by stacking rectangular portions, and the tab tail 16 is formed by stacking trapezoidal portions. It is formed by fixing a rectangular plate-shaped retaining part 15 to one end of the mounting part 14.

Next, a procedure for incorporating the split core 4 into the base core 3 will be described.
As shown in FIG. 4A, the width of the end portion of the tab tail 16 of the split core 4 is larger than the width of the opening of the groove 2 in the outer peripheral surface 3c of the base core 3, and therefore the groove 2 in the outer peripheral surface 3c. Even if the tab tail 16 is inserted into the groove 2 from the opening toward the inner peripheral surface 8a of the fitting space 8, it cannot be inserted. Therefore, as indicated by an arrow A, the tab tail 16 is inserted into the groove 2 from the opening of the groove 2 in the end surface 3 a of the base core 3 toward the axial direction of the base core 3.

  As shown in FIG. 4B, in a state where the tab tail 16 is inserted into the groove 2, the split core 4 can slightly slide (move) in the radial direction of the base core 3. For this reason, when the split core 4 is pushed inward in the radial direction of the base core 3, a part of the tab tail 16 projects from the inner peripheral surface 8 a into the fitting space 8.

  As shown in FIG. 4C, when the tab tail 16 is pushed outward in the radial direction of the base core 3 (in the direction of arrow B), the tab tail 16 comes into contact with the side surface 2 a of the groove 2. Even if the tab tail 16 is pushed further in the direction of arrow B from this state, the split core 4 cannot move in the direction of arrow B. Here, the side surface 2 a constitutes a stop surface on which the tab tail 16 abuts and stops the movement of the split core 4.

  By inserting the disc member 7 (see FIG. 1) of the rotary shaft member 5 (see FIG. 1) into the fitting space 8, the disc member 7 causes the tab tails 16 of the divided cores 4 to move in the direction of arrow B. Can be pushed in. However, as shown in FIG. 4B, when a part of the tab tail 16 protrudes from the inner peripheral surface 8a into the fitting space 8, the disk member 7 is caught by a part of the protruding tab tail 16. Therefore, it may be difficult to insert the disk member 7 into the fitting space 8. Therefore, as shown in FIG. 5, when the outer diameter of the disk member 7 decreases in a taper shape in the direction in which the disk member 7 is inserted into the fitting space 8 (the direction of the arrow C), The end surface 7 a having the smallest outer diameter can be inserted into the fitting space 8 without being obstructed by a part of the tab tail 16 protruding into the joint space 8. If the end surface 7a can be inserted into the fitting space 8, when the disk member 7 is inserted into the fitting space 8, the side surface 7b of the disk member 7 moves the tab tail 16 in the direction of arrow B (FIG. 4C). To see).

  As shown in FIG. 1, when the disk member 7 is inserted into the fitting space 8, the disk member 7 regulates the movement of the split core 4 toward the inside in the radial direction of the base core 3. On the other hand, when the rotor 1 rotates, a centrifugal force directed radially outward of the base core 3 is applied to each divided core 4, and each divided core 4 tends to move in that direction. However, as shown in FIG. 4 (c), when the tab tail 16 is in contact with the side surface 2a of the groove 2, the divided core 4 cannot move further in the direction of the arrow B. It will not come out of the core 3.

  Thus, in the rotor 1 configured by assembling the divided core 4 around which the coil 13 is wound to the base core 3, the plurality of grooves 2 formed in the base core 3 are fitted from the outer peripheral surface 3 c of the base core 3. The tab tail 16 is formed so as to extend to the inner peripheral surface 8 a of the joint space 8, and when the split core 4 is moved radially outward of the base core 3 with the tab tail 16 of the split core 4 being inserted into the groove 2. Since the side surfaces 2 a and 2 a that abut and stop the movement of the split core 4 are provided, it is possible to prevent the split core 4 from coming off from the base core 3.

  In this embodiment, the stop surfaces are the two side surfaces 2a and 2a facing each other, but the present invention is not limited to this mode. For example, as shown in FIG. 6, the tab tail 26 of the split core 4 ′ includes a rectangular parallelepiped first portion 27 and a rectangular parallelepiped second portion 28 narrower than the first portion 27. A shoulder portion 29 is formed between the portion 27 and the second portion 28. The groove 2 ′ has a pair of side surfaces 24, 24 facing each other, and each side surface 24 extends from the inner peripheral surface 8 a of the fitting space 8 toward the outer peripheral surface 3 c of the base core 3. And a second surface 22 extending from the outer peripheral surface 3c toward the inner peripheral surface 8a, and a third surface 23 connecting the first surface 21 and the second surface 22 and perpendicular thereto. When the tab tail 26 of the split core 4 ′ is inserted into the groove 2 ′, the first portion 27 can be inserted between the pair of first surfaces 21, 21, and the second portion 28 is paired with the pair of second surfaces 22, 22. It can be inserted in between. With the tab tail 26 inserted in the groove 2 ′, the split core 4 ′ is movable in the radial direction of the base core 3. However, when the split core 4 ′ is moved outward in the radial direction of the base core 3, the shoulder portion 29 comes into contact with the third surface 23, so that the split core 4 ′ is outside of the base core 3 in the radial direction from this state. Cannot move toward For this reason, the third surface 23 constitutes a stop surface that stops the movement of the split core 4 ′. Even in such a configuration, the third surface acts as a stop surface, so that the split core 4 ′ can be prevented from coming off the base core 3. Note that the stop surface may have any shape as long as it has a function of stopping the movement of the split core to the outside in the radial direction of the base core 3.

  In this embodiment, the coil 13 is wound uniformly along the longitudinal direction of the bobbin 12, but is not limited to this form. In the split coil 4 ″ shown in FIG. 7, the coil 13 may be wound on the bobbin 12 so that the number of turns increases as the distance from the tab tail 16 increases. The outer diameter of the coil 13 is increased in a substantially tapered shape.Normally, when the divided core 4 or 4 ′ (see FIG. 3 or 6) is assembled to the base core 3 (see FIG. 1 or the like), Since the distance between the adjacent split cores increases, the distance between the adjacent coils increases as the distance from the tab tail 16 increases, and the coil density decreases. However, the distance from the tab tail 16 decreases as in the split core 4 ″. Accordingly, the outer diameter of the coil 13 wound around the bobbin 12 is increased in a substantially tapered shape, so that even if it is separated from the tab tail 16, Or to reduce the spread of the distance between the coils to fit, or can be kept the distance constant, it is possible to improve the coil density of the rotor.

  In this embodiment, the number of grooves 2 and 2 'is equal to the number of divided cores 4 and 4', but the present invention is not limited to this embodiment. The tabs 16 and 26 of the split cores 4 and 4 ′ may not be inserted into any of the grooves 2 and 2 ′. That is, it is sufficient that at least one divided core 4, 4 'is provided. Further, the number of the grooves 2 and 2 'may be any number, and at least one groove may be formed. When there is one groove 2, 2 ', the tab tails 16, 26 of one split core 4, 4' are inserted into the one groove 2, 2 '.

  1 rotor, 2, 2 'groove, 2a side surface (stop surface), 3 base core, 3c (base core) outer peripheral surface, 4, 4', 4 "split core, 5 rotating shaft member, 6 rotating shaft, 7 yen Plate member, 8 fitting space, 8a inner surface of (fitting space), 12 bobbin (winding part), 13 coil, 16, 26 tab tail, 23 3rd surface (stop surface).

Claims (4)

A cylindrical base core having at least one groove and a fitting space into which the rotary shaft member is fitted;
At least one split core having a tab tail insertable in the groove and wound with a coil;
The groove is formed to extend from the outer peripheral surface of the base core to the inner peripheral surface of the fitting space, and the split core is moved outward in the radial direction of the base core with the tab tail inserted into the groove. Having a stop surface that stops the movement of the split core when the tab tail abuts when
When the split core is moved radially inward of the base core with the tab tail inserted into the groove, a part of the tab tail protrudes from the inner peripheral surface into the fitting space, and the rotating shaft member is moved. The rotor in which the rotating shaft member pushes a part of the tab tail protruding into the fitting space toward the radially outer side of the base core when inserted into the fitting space.   The rotor according to claim 1, wherein the stop surface is two side surfaces facing each other, and a distance between the two side surfaces decreases in a tapered manner from the inner peripheral surface toward the outer peripheral surface. The rotating shaft member is
A rotation axis;
A disc member that is provided on the rotating shaft and pushes a part of the tab tail protruding into the fitting space toward the outside in the radial direction when inserted into the fitting space;
3. The rotor according to claim 1, wherein an outer diameter of the disk member decreases in a tapered shape in a direction in which the disk member is inserted into the fitting space. The split core includes a winding part around which the coil is wound,
The winding portion is located radially outside the base core with respect to the tab tail in a state where the tab tail is inserted into the groove, and extends in the radial direction of the base core.
The rotor according to any one of claims 1 to 3, wherein the number of windings of the coil increases in the winding part as the distance from the tab tail increases.

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