JP5407512B2 - Field pole magnet body manufacturing apparatus, method for manufacturing the same, and permanent magnet motor - Google Patents

Description

  The present invention relates to a field pole magnet body manufacturing apparatus, a manufacturing method, and a permanent magnet motor used in a permanent magnet motor.

  In the permanent magnet type electric motor, a plurality of field pole magnet bodies are equally provided in the circumferential direction of the iron core constituting the rotor or stator. Each magnet body is configured as an aggregate of a plurality of magnet pieces divided in the axial direction of the iron core, and each magnet piece is covered with an insulator so as to be insulated from each other. In Patent Document 1, it is possible to suppress the eddy current loss and suppress the heat generation of the magnet body by inserting and fitting the magnet body configured as described above into a plurality of mounting holes provided in the circumferential direction of the iron core. Have been described.

JP 11-252833 A

  In the above conventional technique, in order to divide the magnet body into each magnet piece, it is cut using a rotary blade in one process, the orientation of each magnet piece cut in another process is aligned, and each magnet in another process Since each process is performed in a different place such as bonding the pieces, the number of assembly steps increases.

  An object of this invention is to reduce the assembly man-hour at the time of manufacturing the magnet body comprised from a several magnet piece.

  A field pole magnet body manufacturing apparatus according to the present invention includes a mounting table for mounting a magnet body, positioning means for positioning the mounting table and the magnet body so that one end of the magnet body protrudes from the mounting table, and a magnet body A fixing means for fixing the magnet body to the mounting table, and a pressing means for pressing a portion of the magnet body that protrudes from the mounting table, and after positioning the magnet body by the positioning means, the magnet body is fixed by the fixing means, By pressing the magnet body with the pressing means, the magnet body is sequentially broken from one end side to divide the magnet body into a plurality of magnet pieces, and every time the divided and broken magnet pieces are divided, it slides down by gravity. A chute, a magnet piece that slides down at a predetermined position of the chute, a stopper that holds the magnet pieces so that they are aligned in a line in the downhill direction, and a magnet each time the magnet piece reaches the stopper Application means for applying an adhesive to the rear surface in the direction of travel of the sheet, and conveying and accumulating means for releasing the stopper when a predetermined number of magnet pieces accumulated on the stopper reach, and a pair of restraining jigs. And a restraining means for sandwiching and restraining the assembly of magnet pieces transported from the transporting and accumulating means by being released by a pair of restraining jigs.

  According to the present invention, the magnet body is broken and divided by the dividing means, and the magnet pieces divided by the conveying and accumulating means are accumulated while applying the adhesive, and are restrained by the restraining means as a predetermined number of assemblies. Can be performed at the same place, and the number of man-hours for assembling the field pole magnet body composed of a plurality of magnet pieces can be reduced.

It is a schematic block diagram which shows the structure of the principal part of the permanent magnet type electric motor to which the magnet body manufactured with the manufacturing apparatus of the magnetic body for field poles in this embodiment is applied. It is a block diagram which shows the structure of a magnet body. It is a schematic block diagram which shows the manufacturing apparatus of the magnetic body for field poles in this embodiment. It is a schematic block diagram which shows the structure of a magnet division jig. It is a block diagram which shows the structure of a positioning jig. It is a block diagram which shows the structure of a positioning jig guide. It is a schematic diagram which shows a positioning mechanism. It is a schematic block diagram which shows the structure of a division | segmentation magnet chute | shoot jig | tool. It is a block diagram which shows the structure of a division | segmentation magnet chute | shoot jig | tool. It is a schematic diagram which shows the cross-sectional dimension of a chute | shoot and the dimension of a magnet piece. It is a schematic diagram which shows the relationship between the cross-sectional dimension of a chute | shoot and the dimension of a magnet piece. It is a schematic block diagram which shows the structure of a magnet restraint conveyance jig. It is a block diagram which shows the structure of a positioning jig. It is a block diagram which shows the structure of a positioning jig guide. It is a schematic block diagram which shows the structure of a restraining jig. It is a block diagram which shows the structure of an upper restraint jig and a lower restraint jig. It is a schematic block diagram which shows the structure of the division | segmentation magnet chute | shoot jig | tool in another embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic configuration diagram illustrating a configuration of a main part of a permanent magnet type electric motor to which a magnet body manufactured by a field pole magnet body manufacturing apparatus according to the present embodiment is applied. FIG. FIG.1 (b) is sectional drawing which shows the II cross section of Fig.1 (a). FIG. 2 is a configuration diagram showing the configuration of the magnet body.

  The permanent magnet type electric motor A (hereinafter simply referred to as “electric motor”) includes an annular stator 10 constituting a part of a casing (not shown), and a cylindrical rotor 20 disposed coaxially with the stator 10. Is done.

  The stator 10 includes a stator body 11 and a plurality of coils 12. The plurality of coils 12 are formed in coil holes 13 formed at equal angular intervals on the same circumference around the axis O in the stator body 11. To be detained.

  The rotor 20 includes a rotor body 21, a rotating shaft 23 that rotates integrally with the rotor body 21, and a plurality of field pole magnet bodies 30 (hereinafter simply referred to as “magnet bodies”). 30 are accommodated in fitting holes 22 formed at equal angular intervals on the same circumference around the axis O.

  As shown in FIG. 2, the magnet body 30 accommodated in the fitting hole 22 of the rotor 20 is bonded to a plurality of magnet pieces 31 obtained by breaking the magnet body 30 by an insulating material 32, thereby forming an aggregate of the magnet pieces 31. Composed.

  Hereinafter, an apparatus for manufacturing the field pole magnet body 30 used in the permanent magnet type electric motor A will be described.

  FIG. 3 is a schematic configuration diagram showing a field pole magnet body manufacturing apparatus in the present embodiment. The field pole magnet body manufacturing apparatus 100 includes a magnet split jig 40 that splits the magnet body 30 into a plurality of magnet pieces 31, a split magnet chute jig 60 that transports the split magnet pieces 31, and each magnet. It is comprised from the magnet restraint conveyance jig 80 which fixes the piece 31 to a predetermined direction and position.

  The magnet body 30 is broken and divided into a plurality of magnet pieces 31 in a magnet split jig, and is transported downward by sliding down the split magnet chute jig 60. When a predetermined number of magnet pieces 31 are aligned, the magnet restraint transport jig 80, and fixed and bonded by a magnet restraining and conveying jig 80.

  Here, the magnet dividing jig 40 will be described with reference to FIGS.

  4A and 4B are schematic configuration diagrams showing the configuration of the magnet split jig, where FIG. 4A is a top view, FIG. 4B is a side view of FIG. 4A viewed from the direction of arrow A, and FIG. The side view seen from the B direction is shown. 5A and 5B are configuration diagrams showing the structure of the positioning jig, where FIG. 5A is a top view, FIG. 5B is a side view of FIG. 5A viewed from the direction of arrow A, and FIG. The side view seen from the direction is shown. 6A and 6B are configuration diagrams showing the structure of the positioning jig guide, where FIG. 6A is a top view, FIG. 6B is a side view of FIG. 6A viewed from the direction of arrow A, and FIG. The side view seen from the B direction is shown.

  The magnet split jig 40 includes a die 41 for placing the magnet body 30, a positioning jig 42 for defining the horizontal position of the magnet body 30, and the horizontal direction of the positioning jig 42 in cooperation with the positioning jig 42. A positioning jig guide 43 for defining the position, a magnet fixing jig 45 for fixing the magnet body 30 at the end 44 of the die 41, and a portion protruding from the die 41 of the magnet body 30 are pushed in to break the magnet body 30. And a punch 46 to be made.

  The magnet body 30 is previously provided with a groove 47 at a desired position to be broken. The groove 47 may be formed by, for example, mechanical cutting, or may be formed by laser processing or wire cut electric discharge processing.

  As shown in FIG. 5, the positioning jig 42 includes two side portions 48 and a connecting portion 49 that connects the two side portions 48, and is arranged so as to straddle the die 41. The lower surface 50 of the connecting portion 49 is in sliding contact with the upper surface of the die 41, and the positioning jig 42 moves in parallel with the upper surface of the die 41. A stepped opening 52 as shown in FIG. 5B is provided on each of the two side portions 48 of the positioning jig 42, and the positioning jig 42 is engaged with the protrusion 53 of the positioning jig guide 43. The horizontal position is defined.

  One positioning jig guide 43 is provided on each side of the positioning jig 42 to support the positioning jig 42 and guide the horizontal movement of the positioning jig 42. As shown in FIGS. 6A and 6C, a projection 53 is provided on the side of the positioning jig guide 43 and meshes with the stepped opening 52 of the positioning jig 42. The positioning jig guide 43 has a pair of projections 53 provided on the side shown in FIG. 6A and those provided on the opposite side, and the projections 53 are openings of the positioning jig 42. 52 to be engaged with each other.

  Here, a positioning mechanism for defining the horizontal position of the positioning jig 42 in cooperation with the positioning jig 42 and the positioning jig guide 43 will be described with reference to FIG. FIG. 7 is a schematic diagram showing how the positioning jig is positioned by the positioning mechanism.

  The positioning mechanism includes a stepped opening 52 of the positioning jig 42 and a projection 53 of the positioning jig guide 43. When the opening 52 and the protrusion 53 are engaged with each other in the state shown in FIG. 7A, the positioning jig guide 43 is lowered by a pusher (not shown) to the state shown in FIG. The positioning jig 42 is pressed to the right and moved to the state shown in FIG. As a result, the positioning jig 42 moves to the right by D1.

  Similarly, the positioning jig guide 43 is lowered by the pusher to the state shown in FIG. 7D, and the positioning jig 42 is pressed and moved rightward by another pusher to obtain the state shown in FIG. 7E. As a result, the positioning jig 42 further moves to the right by D1.

  The shapes and dimensions of the opening 52 and the protrusion 53 are set so that the moving amount D1 of the positioning jig 42 is a distance between adjacent grooves of the magnet body 30. Thereby, the groove 47 of the magnet piece 31 is always aligned with the end of the die 41 every time the positioning jig 42 moves in the horizontal direction.

  The magnet fixing jig 45 is a jig that fixes the magnet body 30 by pressing it toward the die 41, and presses the magnet body 30 by bolt fastening or hydraulic pressure. The punch 46 breaks the magnet body 30 along the groove 47 of the magnet body 30 by pressing a portion protruding from the die 41 of the magnet body 30 downward. The punch 46 is driven by, for example, a servo press, a mechanical press, a hydraulic press, or the like.

  Returning to FIG. 4, the magnet splitting jig 40 is configured as described above, and the magnet body 30 provided with the grooves 47 is placed on the upper surface of the die 41, and the length of one magnet piece 31 is set by the positioning mechanism. The magnet body 30 is fixed by the magnet fixing jig 45 while protruding from the right end of the die 41. Further, when the punch 46 is lowered, the magnet body 30 is broken and divided along the groove, and the magnet piece 31 drops onto the divided magnet chute jig 60.

  Next, the split magnet chute jig 60 will be described with reference to FIGS. 3 and 8 to 10.

  FIG. 8 is a schematic configuration diagram showing the configuration of the split magnet chute jig. FIG. 9 is a block diagram showing the structure of the split magnet chute jig, FIG. 9A is a top view of FIG. 8 viewed from the direction of arrow A, and FIG. 9B is AA of FIG. Sectional drawing which shows a cross section, FIG.9 (c) is sectional drawing which shows the BB cross section of Fig.9 (a).

  The split magnet chute jig 60 includes a chute 61 on which the magnet piece 31 broken by the magnet split jig 40 slides down, and a stopper 62 that holds the magnet piece 31 on which the chute 61 slides down at the lower end of the chute 61. Furthermore, an air blow 63 for blowing off chips and dust adhering to the magnet piece 31 by air and a dispenser 64 for applying an insulating adhesive to the magnet piece 31 are provided on the upper part of the split magnet chute jig 60.

  The chute 61 surrounds a chute surface 65 on which the magnet piece slides down, a wall portion 66 that is provided on both sides of the chute surface 65 and restricts the movement of the magnet piece 31 in the width direction, and an upper portion of the chute surface 65. The upper lid portion 71 is provided only on the upstream side of the chute surface 65. Accordingly, it is possible to prevent the broken magnet piece 31 from jumping up from the chute 61 and jumping out of the chute 61 on the upstream side, and to increase the degree of freedom of operation of the dispenser 64 and the air blow 63 on the downstream side.

  The vertical position of the chute 61 is set such that the chute surface 65 at the most upstream portion of the chute 61 is lower than the upper surface of the die 41 by a predetermined length. The predetermined length needs to be set to an interval that can prevent the magnet piece 31 from being broken due to the fall of the magnet body 30 while keeping an interval to the extent that the magnet piece 31 can be prevented from being caught after being broken. For example, it is set to 1 mm.

  Further, as shown in FIGS. 9B and 9C, the size in the width direction of the chute surface 65 is L1 on the upstream side and L2 (<L1) on the downstream side, and gradually increases from upstream to downstream. The width is set to be smaller. Thereby, since the space | interval of the width direction becomes narrower toward the downstream side, it is possible to prevent positional deviation between the magnet piece 31 held by the stopper 62 and the magnet piece 31 that has newly slid down. Further, as the width of the chute 61 becomes smaller, the friction between the magnet piece 31 that slides down the chute 61 and the wall portion 66 increases and the downhill speed decreases, so that the magnet piece 31 held by the stopper 62 is newly added. It is possible to prevent the chipping and the like by reducing the impact when the magnet piece 31 that has slid down collides.

  As shown in FIG. 8, the magnet piece 31 broken and divided by the magnet dividing jig 40 falls on the chute surface 65 of the chute 61 and slides down obliquely downward along the chute surface 65. The air blow 63 blows air to the magnet piece 31 that slides down the chute surface 65 and blows off chips and dust adhering to the magnet piece 31. The magnet piece 31 is restrained by a stopper 62 at the lowermost end of the chute 61. The magnet piece 31 restrained by the stopper 62 is pressed against one end in the width direction of the chute 61 by the pusher 67 and is aligned with the wall portion 66 constituting the side surface of the chute 61.

  Thereafter, the dispenser 64 is lowered to the position of the magnet piece 31 in a state of being in contact with the stopper 62, and an adhesive is sent from the tip end portion 68 of the dispenser 64 and applied to the fracture surface 69 which is the rear surface of the magnet piece 31. After applying the adhesive, the dispenser 64 moves up and returns to a predetermined standby position.

  Subsequently, when the next magnet piece 31 is broken and divided and falls while sliding down the chute surface 65, the air blow 63 blows away chips and dust attached to the magnet piece 31, and then the fracture surface of the magnet piece 31. Comes into contact with the fracture surface 69 of the magnet piece 31 to which the adhesive has already been applied. Further, the pusher 67 is pressed against one end in the width direction of the chute 61 and is aligned with the magnet piece 31 to which the adhesive has already been applied. Thereby, the two magnet pieces 31 are temporarily bonded via the adhesive. Thereafter, an adhesive is further applied to the rear surface 69 of the magnet piece 31 by a dispenser.

  By repeating the above operation, the air blow 63, the dispenser 64, and the pusher 67 are operated each time the magnet piece 31 is broken and divided, and the plurality of magnet pieces 31 are integrated and temporarily fixed in a row.

  Here, the cross-sectional dimension of the chute 61 will be described with reference to FIGS. 10 and 11.

  FIG. 10 is a schematic view showing the cross-sectional dimensions of the chute and the dimensions of the magnet piece 31, FIG. 10 (a) is a cross-sectional view showing the cross-section of the chute, and FIGS. 10 (b), 10 (c), and 10 (d) are the magnet pieces. It is a top view which shows the dimension. FIG. 10B shows a surface parallel to the chute surface, FIG. 10C shows a surface perpendicular to the chute surface and broken, and FIG. 10D shows a surface perpendicular to the chute surface. The surface that slides on the side of the chute is shown.

  The cross-sectional dimension of the chute 61 is set so that the magnet piece 31 that is divided by breaking does not rotate and change its orientation when it slides down. That is, the length L2 of the chute 61 in the width direction is shorter than the diagonal length L4 of the plane parallel to the chute surface 65 of the magnet piece 31 (FIG. 10A), and the fracture surface of the magnet piece 31 (FIG. It is set to be shorter than the diagonal length L5 of b)). Further, the length L3 of the chute 61 in the height direction is set to be shorter than the length L6 of the diagonal line of the side surface of the magnet piece 31 (FIG. 10C).

  FIG. 11 is a schematic diagram showing the relationship between the cross-sectional dimension of the chute and the dimension of the magnet piece, FIG. 11 (a) is a top view of the chute, and FIG. 11 (b) is an enlarged view of a range A in FIG. 11 (a). 11C is a cross-sectional view taken along the line BB in FIG. 11A, and FIG. 11D is a cross-sectional view taken along the line CC in FIG.

  As shown in FIG. 11B, since the width L2 of the chute 61 is narrower than the diagonal length L4 of the magnet piece 31, the rotation of the magnet piece 31 with the axis perpendicular to the chute surface 65 as the rotation axis is performed. Is prevented. Further, as shown in FIG. 11C, since the width L2 of the chute 61 is narrower than the diagonal length L5 of the magnet piece 31, the rotation of the magnet piece 31 with the axis of the downhill direction of the magnet piece 31 as the rotation axis. Is prevented. Further, as shown in FIG. 11D, since the height L3 of the chute 61 is shorter than the diagonal length L6 of the magnet piece 31, the rotation of the magnet piece 31 with the axis in the width direction of the chute 61 as the rotation axis. Is prevented.

  As a result, the magnet piece 31 is broken and divided and slides down to the downstream end while maintaining the orientation when the magnet piece 31 is dropped onto the chute 61.

  In the split magnet chute jig 60, the magnet piece 31 is slid down by gravity using the chute 61. However, the magnet piece 31 may be conveyed using a belt conveyor instead of the chute 61.

  Next, the magnet restraint conveyance jig 80 will be described with reference to FIGS. 3 and 12 to 14.

  12A and 12B are schematic configuration diagrams showing the configuration of the magnet restraining and conveying jig, where FIG. 12A is a top view, FIG. 12B is a side view of FIG. 12A viewed from the direction of arrow A, and FIG. The side view seen from the arrow B direction is shown. 13A and 13B are configuration diagrams showing the structure of the positioning jig, where FIG. 13A is a top view, FIG. 13B is a side view of FIG. 13A viewed from the direction of arrow A, and FIG. The side view seen from the direction is shown. 14A and 14B are configuration diagrams showing the structure of the positioning jig guide, where FIG. 14A is a top view, FIG. 14B is a side view of FIG. 14A viewed from the direction of arrow A, and FIG. The side view seen from the B direction is shown.

  The magnet restraining and conveying jig 80 includes a restraining jig 81 that restrains the aggregate of the magnet pieces 31 temporarily bonded in the divided magnet chute jig 60, a base plate 82 on which the restraining jig 81 is placed, and a restraining jig 81. The positioning jig 83 defines the horizontal position of the positioning jig 83 and the positioning jig guide 84 defines the horizontal position of the positioning jig 83 in cooperation with the positioning jig 83.

  As shown in FIG. 13, the positioning jig 83 includes two side portions 85 and a connecting portion 86 that connects the two side portions 85, and is disposed so as to straddle the base plate 82. The lower surface 87 of the connecting portion 86 is in sliding contact with the upper surface of the base plate 82, and the positioning jig 42 moves in parallel with the upper surface of the base plate 82. A stepped opening 92 as shown in FIG. 13B is provided on each of the two side portions 85 of the positioning jig 83, and the positioning jig 83 is engaged with the projection 88 of the positioning jig guide 84. The position of is defined.

  As shown in FIG. 14, one positioning jig guide 84 is provided on each side of the positioning jig 83 to support the positioning jig 83 and guide the horizontal movement of the positioning jig 83. As shown in FIGS. 14A and 14C, a projection 88 is provided on the side of the positioning jig guide 84 and meshes with the stepped opening 92 of the positioning jig 83. The positioning jig guide 84 has a pair of projections 88 provided on the side shown in FIG. 14A and those provided on the opposite side, and the projection 88 is an opening of the positioning jig 83. 92 to be engaged with each other.

  The positioning mechanism for defining the horizontal position of the positioning jig 83 in cooperation with the positioning jig 83 and the positioning jig guide 84 is the same as the positioning mechanism of the magnet split jig 40 shown in FIG. Therefore, explanation is omitted here.

  Here, the restraining jig 81 will be described with reference to FIGS. 15 and 16.

  15 is a schematic configuration diagram showing the structure of the restraining jig, FIG. 15A is an overall configuration diagram of the restraining jig, FIG. 15B is a plan view of FIG. 15A viewed from the A direction, FIG.15 (c) is sectional drawing which shows the BB cross section of FIG.15 (b). 16 is a configuration diagram showing the structure of the upper restraining jig and the lower restraining jig, FIG. 16 (a) is a plan view of the upper restraining jig, FIG. 16 (b) is a side view of the upper restraining jig, FIG. 16C is a plan view of the lower restraining jig, and FIG. 16D is a side view of the lower restraining jig.

  The restraining jig 81 is composed of an upper restraining jig 89 and a lower restraining jig 90, and the upper restraining jig 89 and the lower restraining jig 90 have a large number of L-shaped grooves 91 at equal intervals. Provided. The restraining jigs 89 and 90 restrain the aggregate of the magnet pieces 31 by overlapping the grooves 91 so as to fit each other. The upper restraint jig 89 and the lower restraint jig 90 are the lower restraint shown in FIG. 16C at the points a, b, c, and d of the upper restraint jig 89 shown in FIG. The jigs 90 are overlaid so as to match the points a, b, c, and d, respectively.

  As a result, the assembly of the magnet pieces 31 restrained by the restraining jigs is restrained in the width direction and the vertical direction of the assembly of the magnet pieces 31 as shown in FIG. As shown in (), the magnet piece 31 is constrained in the length direction of the aggregate.

  Returning to FIG. 12, the magnet restraining / conveying jig 80 is configured as described above, and the magnet temporarily attached in the split magnet chute jig 60 with only the lower restraining jig 90 placed on the base plate 82. The assembly of pieces 31 is slid into the groove 91 of the lower restraining jig 90. That is, after aligning the groove 91 of the lower restraining jig 90 and the downstream end of the chute 61, the stopper 62 of the chute 61 is opened to slide the assembly of the magnet pieces 31 into the predetermined groove 91. The stopper 62 is closed again.

  Thereafter, the positioning jig 83 is moved in the horizontal direction by a predetermined amount by the positioning mechanism, thereby moving the lower restraining jig 90 in the horizontal direction. Accordingly, the groove 91 adjacent to the groove 91 in which the aggregate of the magnet pieces 31 is accommodated is aligned with the downstream end of the chute 61. When a desired number of magnet pieces 31 held by the stopper 62 of the chute 61 are aligned, the stopper 62 is opened again and the aggregate of the magnet pieces 31 is stored in the groove 91.

  By repeating the above operation, the assembly of the magnet pieces 31 is sequentially stored in the grooves 91 of the lower restraining jig 90, and when all the grooves 91 are stored, the upper restraining jig 89 is lowered by a robot arm (not shown). Superimpose on the side restraining jig 90. In this state, the upper restraining jig 89 and the lower restraining jig 90 are clamped by a clamper (not shown), put into a heating furnace (not shown) and heated to heat cure the adhesive, and the assembly of the magnet pieces 31. Glue completely.

  Note that a two-component adhesive may be used as the adhesive instead of the thermosetting adhesive, and in this case, it is not necessary to put it into the furnace, and the adhesive is completely adhered over time.

  The field pole magnet body manufacturing apparatus in the present embodiment is configured as described above, and the magnet body 30 is moved from one end side using the magnet split jig 40, the split magnet chute jig 60, and the magnet restraint transport jig 80. The broken pieces are sequentially broken, the divided magnet pieces 31 are slid down, an adhesive is applied to the broken surface 33 which is the rear surface 69 of the magnet piece 31 held by the stopper 62, and then the broken and divided magnets are slid down. The piece 31 is brought into contact with the surface of the magnet piece 31 previously held by the stopper 62 and applied with the adhesive, and the above operation is repeated to align the plurality of magnet pieces 31 in a row. The assembly of is restrained and integrated completely.

  As described above, in the present embodiment, the magnet body 30 is broken and divided by the magnet dividing jig 40, and the magnet pieces 31 divided by the divided magnet chute jig 60 are sequentially accumulated while being applied with an adhesive. The field pole magnet body 30 composed of the plurality of magnet pieces 31 can be manufactured by restraining the magnet pieces 31 with the magnet restraining and conveying jig 80, so that the magnet body 30 is divided and the magnet pieces 31 are kept in alignment. The steps of bonding the magnet pieces 31 can be performed at the same place, and the number of assembling steps can be reduced. Further, since the plurality of magnet pieces 31 are adjacent to each other through an insulating adhesive, the contact resistance between the magnet pieces 31 is increased, and the magnet body 30 is disposed on the rotor 20 or the stator 10 of the permanent magnet type electric motor A. When it does, the heat_generation | fever suppression effect of the magnet body 30 can be improved.

  The length L2 in the width direction of the chute surface 65 is shorter than the diagonal length L4 of the plane parallel to the chute surface 65 of the magnet piece 31, and the length of the diagonal line of the fracture surface that is the front and rear surfaces of the magnet piece 31. Since it is set to be shorter than L5, the rotation of the magnet piece 31 when sliding down the chute surface 65 can be prevented, and the magnet piece 31 can be aligned with the stopper 62 in a predetermined direction.

  Further, since the length L3 of the chute 61 in the height direction is set to be shorter than the diagonal length L6 of the side surface of the magnet piece 31, the magnet piece 31 jumps when sliding down the chute surface 65, so Inversion can be prevented, and the magnet piece 31 can be aligned with the stopper 62 in a predetermined direction.

  Further, since the dimension in the width direction inside the chute 61 is set so as to decrease toward the downstream of the chute 61, when the magnet piece 31 slides down to the position of the stopper 62, the width direction of the magnet piece 31 increases toward the downstream. Therefore, the plurality of magnet pieces 31 can be aligned more accurately in the stopper 62. Further, since the friction between the magnet piece 31 and the wall portion 66 of the chute 61 increases as it goes downstream, the downhill speed of the magnet piece 31 decreases, so that the next to the magnet piece 31 already held by the stopper 62. It is possible to mitigate the impact when the magnet piece 31 that slides down collides, and to prevent the magnet piece 31 from being chipped.

  Further, since the most upstream portion of the chute surface 65 is set to be lower than the upper surface of the die 41 by a predetermined dimension (1 mm), the magnet piece 31 divided by the magnet dividing jig 40 is dropped to the chute surface 65. Therefore, it is possible to smoothly slide down to the downstream side without being caught after landing on the chute surface 65 by applying momentum to the magnet piece 31. Further, since the height at which the magnet piece 31 falls is set to 1 mm, it is possible to suppress the impact when the magnet piece 31 lands on the chute surface 65 and to prevent the magnet piece 31 from being chipped. .

  Further, since the pusher 67 that presses the magnet piece 31 restrained by the stopper 62 against one end in the width direction of the chute 61 is provided, the plurality of magnet pieces 31 held by the stopper 62 can be accurately moved along the wall portion 66 of the chute 61. Can be aligned in a row.

  Further, since the air blow 63 that blows air onto the magnet piece 31 that slides down the chute 61 is provided, chips, dust, and the like adhering to the broken and broken magnet piece 31 are removed before the magnet piece 31 reaches the stopper 62. be able to.

  The present invention is not limited to the embodiment described above, and various modifications and changes can be made within the scope of the technical idea.

  For example, as shown in FIG. 17, the swallowing part 101 that is the most upstream part of the chute 61 may be divided and configured as a separate body. 17, the swallowing part 101 of the chute 61 is provided separately from the chute 61, and the swallowing part 101 is rotatably supported by the die 41 via a fulcrum 102. A cushion 103 that can be expanded and contracted is provided below the swallowing portion 101 so as to contact the lower surface of the swallowing portion 101 and the side surface of the die 41. The swallowing part 101 is held horizontally by being urged upward by the cushion 103.

  As shown in FIG. 17A, when the magnet piece 31 is broken and divided by the magnet dividing jig 40, the magnet piece 31 falls to the swallowing portion 101, and the cushion 103 is contracted by the weight of the magnet piece 31. The swallowing part 101 rotates around a fulcrum 102.

  As shown in FIG. 17B, when the swallowing part 101 is rotated to a position where it comes into contact with the upstream end of the chute 61, the magnet piece 31 slides down due to the inclination of the swallowing part 101 and is transferred to the chute 61. When the delivery of the magnet piece 31 is completed, the lightened swallowing part 101 rotates around the fulcrum 102 by the extension of the cushion 103 and returns to the original horizontal position shown in FIG.

  As a result, the magnet piece 31 that is divided and dropped by the magnet dividing jig 40 lands in parallel with the swallowing portion 101, so that the impact due to the drop of the magnet piece 31 can be received by the surface, and the chip of the magnet piece 31 is missing. Can be prevented. Moreover, since the swallowing part 101 rotates and delivers the magnet piece 31 to the chute 61 every time the magnet piece 31 falls on the swallowing part 101, the magnet piece 31 is caught in the swallowing part 101 where the magnet piece 31 falls. Therefore, the magnet pieces 31 can be sequentially slid down.

A Permanent magnet type motor 10 Stator 20 Rotor 30 Field pole magnet body 31 Magnet piece 40 Magnet split jig (split means)
41 die (mounting table)
60 split magnet chute jig (conveying and accumulating means)
61 Chute 62 Stopper 63 Air blow 65 Chute surface 66 Allowable part 71 Upper lid part 80 Magnet restraint conveyance jig (restraint means)
DESCRIPTION OF SYMBOLS 100 Field pole magnet manufacturing apparatus 101 Capture part 102 Support point

Claims (10)

In the manufacturing apparatus for the field pole magnet body disposed in the rotor or stator of the permanent magnet type motor,
A mounting table for mounting the magnet body, positioning means for positioning the mounting table and the magnet body so that one end of the magnet body protrudes from the mounting table, and fixing the magnet body to the mounting table Fixing means and pressing means for pressing a portion of the magnet body protruding from the mounting table, after positioning the magnet body by the positioning means, the magnet body is fixed by the fixing means, Splitting means for sequentially breaking the magnet body from one end side and splitting it into a plurality of magnet pieces by pressing the magnet body by the pressing means;
A chute that slides down by gravity each time the magnet pieces broken and divided by the dividing means are divided, and the magnet pieces that slide down are stopped at a predetermined position of the chute, and the magnet pieces are aligned in a line in the downhill direction. And a coating means for applying an adhesive to the rear surface in the advancing direction of the magnet piece every time the magnet piece reaches the stopper, and the magnet pieces integrated in the stopper are in a predetermined number. Conveying and accumulating means for releasing the stopper when reaching,
A restraining means having a pair of restraining jigs, and holding and restraining the assembly of the magnet pieces transported from the transporting and accumulating means by the pair of restraining jigs when the stopper is released;
An apparatus for manufacturing a field pole magnet body. The chute has a sliding surface on which the magnet piece slides down, and wall portions that restrict movement of the magnet piece in the width direction on both sides in the width direction of the sliding surface,
The width direction dimension of the downhill surface defined by the wall portion is shorter than the diagonal length of a plane parallel to the downhill surface of the magnet piece and the diagonal length of the front and back surfaces of the magnet piece. The field pole magnet body manufacturing apparatus according to claim 1. The chute has an upper lid portion that is provided on an upper part of the chute and surrounds at least a part of the downhill surface.
The field pole magnet body according to claim 2, wherein the vertical dimension of the sliding surface defined by the upper lid portion is shorter than the length of the diagonal line of the surface of the magnet piece in sliding contact with the wall portion. Manufacturing equipment.   4. The field pole magnet body manufacturing apparatus according to claim 2, wherein a dimension of the sliding surface in a width direction is smaller toward a downstream side of the chute. 5.   5. The field pole according to claim 2, wherein the chute is arranged such that a most upstream portion of the sliding surface is lower than a top surface of the mounting table by a predetermined dimension. Magnet body manufacturing equipment.   The field according to any one of claims 2 to 5, wherein the conveying and accumulating unit includes an urging unit that urges the magnet piece held by the stopper to one of the wall portions. Magnetic pole body manufacturing device.   The field conveying magnet body manufacturing apparatus according to any one of claims 1 to 6, wherein the conveying and accumulating means has an air blow for blowing air to the magnet piece that slides down the chute.   The chute has a take-in part that receives the magnet piece broken and divided by the dividing means, and a chute part that slides down the magnet piece received by the take-in part, and the take-in part is centered on a fulcrum. The shoot part is provided separately from the chute part so as to be rotatable, and the magnet piece is sent from the dividing means to the chute part by turning the take-in part. The manufacturing apparatus of the magnetic body for field poles of any one of 7 to 7. A method of manufacturing a field pole magnet body disposed on a rotor or stator of a permanent magnet type electric motor,
Breaking the magnet body sequentially from one end side and dividing it into a plurality of magnet pieces;
Sliding down the broken and broken magnet pieces to a stopper provided below by gravity each time it is divided;
Applying an adhesive to the fracture surface of the magnet piece slid down by the step of sliding down ;
Bringing the magnet piece to be slid down by the step of sliding down against a fractured surface of another magnet piece and coated with an adhesive;
Aligning the magnet pieces in a row by sequentially repeating the dividing step, the sliding down step, the applying step, and the contacting step;
Integrally constraining the assembly of magnet pieces aligned in a row by the aligning step;
A method of manufacturing a field pole magnet body comprising:   In the permanent magnet type electric motor, the field pole magnet body manufactured by the manufacturing apparatus according to any one of claims 1 to 8 or the manufacturing method according to claim 9 is disposed on the rotor or the stator. Permanent magnet type electric motor characterized by