JP2020072590A - Transport pallet - Google Patents

Abstract

To provide a transport pallet capable of being supported so as not to rotate during transport of stator cores capable of being constructed at low cost, having different outer diameters.SOLUTION: The transport pallet includes: a base member; a plurality of first positioning units, arranged on the base member to be aligned with the base member in a circumferential direction around a predetermined center point, for respectively supporting a part of a bottom surface of a first stator core and being engaged with the ears of the first stator core from the outside; and a plurality of second positioning units, disposed on the base member to be displaced to one side in the circumferential direction and to the outside in the radial direction from the first positioning units so as to be arranged around the center point in the circumferential direction at intervals, for supporting a part of the bottom surface of a second stator core and engaging with the ears of the second stator core from the outside.SELECTED DRAWING: Figure 4

Description

  The present disclosure relates to a transfer pallet for transferring a stator core of a rotating electric machine.

  Conventionally, as this type of transfer pallet, a pallet body formed in a plate shape and first, second and third stators having different outer diameters are individually and coaxially provided on the valet body. A device including first, second and third support portions is known (see, for example, Patent Document 1). In this transfer pallet, the first support portion includes four large-diameter fixed pedestals that respectively support the outer peripheral surface of the large-diameter first stator from the outside, and the second support portion includes the medium-diameter second stator. It includes four folding pedestals that support the outer peripheral surface from the outside, and the third support portion includes four small-diameter fixed pedestals that respectively support the outer peripheral surface of the third stator having a small diameter from the outside. Each folding pedestal of the second support portion includes a base attached to the pallet body, and a pedestal foldably connected to the base via a hinge. The pedestal is located between the adjacent small-diameter fixed pedestals of the third support portion in a state of being tilted to the pallet body side, and supports the outer peripheral surface of the second stator from the outside in a state of being erected so as to project upward. ..

JP, 2018-64363, A

  However, the above-mentioned conventional transfer pallet includes a movable folding pedestal, and has room for improvement in cost. Further, since the first to third support portions of the conventional transfer pallet support the first, second or third stator from the outside, when the conventional transfer pallet is used, the The stator may rotate.

  Therefore, the present disclosure has a main object to provide a transfer pallet that can be configured at low cost and that can support stator cores having different outer diameters so as not to rotate during transfer.

  The transfer pallet according to the present disclosure includes a first stator core including a plurality of ears protruding outward from the outer peripheral surface at intervals in the circumferential direction, and a plurality of outer pallets protruding outward from the outer peripheral surface at intervals in the circumferential direction. A transport pallet that includes an ear portion and is capable of supporting both a second stator core whose length from the shaft center to the ear portion is determined to be longer than that of the first stator core. Are arranged on the base member so as to be lined up around the center point at intervals in the circumferential direction, each of which supports a part of the bottom surface of the first stator core and is engaged with the ear portion of the first stator core from the outside. A plurality of first positioning portions that are aligned with each other, and are arranged on the base member while being shifted from the first positioning portion to one side in the circumferential direction and to the outer side in the radial direction so as to be arranged at intervals in the circumferential direction around the center point. Installed, it It is those containing a plurality of second positioning portions that engage from the outside to the ears of the second stator core to support the part of the bottom surface of the second stator core.

  The transfer pallet according to the present disclosure supports a base member and a plurality of first positioning parts provided on the base member so as to respectively support a part of the bottom surface of the first stator core and to engage the ears of the first stator core from the outside. And a plurality of second positioning portions arranged on the base member so as to respectively support a part of the bottom surface of the second stator core and engage with the ears of the second stator core from the outside. Further, the plurality of first positioning portions corresponding to the small-diameter first stator cores are arranged on the base member so as to be arranged at intervals in the circumferential direction around a predetermined center point. Further, the plurality of second positioning members corresponding to the large-diameter second stator core are arranged on the one side in the circumferential direction and on the outside in the radial direction from the first positioning portion so as to be arranged at intervals in the circumferential direction around the center point. It is arranged on the base member while being displaced. This eliminates the movable part and suppresses the cost increase, while supporting the first and second stator cores having different outer diameters on the transfer pallet and engaging with the corresponding ears of the first or second stator cores, respectively. It is possible to regulate the rotation of the first or second stator core during the transportation by the plurality of first or second positioning portions. In addition, in the transport pallet of the present disclosure, the heights of the portions that support the bottom surface of the first or second stator core of the first and second positioning portions can be made uniform. Therefore, it is possible to suppress the height from the bottom surface of the transfer pallet to the upper end surfaces of the first and second stator cores during transfer, thereby suppressing an increase in the size of the equipment.

  The first stator core may include a plurality of teeth arranged at a constant pitch, and the second stator core may have a plurality of teeth arranged at the same pitch as the first stator core. A tooth portion may be included, and the second positioning portion may be arranged on the base member while being offset from the first positioning portion to one side in the circumferential direction by an angle corresponding to the constant pitch. Good. As a result, since a common coil mounting device can be used when assembling the coils to the first and second stator cores, the equipment cost can be reduced.

  Further, the first and second positioning portions are fixed to the base member and support a part of the bottom surface of the first or second stator core, and the ear portion of the first or second stator core. It may include two protrusions protruding from the pedestal at intervals in the circumferential direction so as to come into contact with an outer peripheral surface, and the two protrusions of the second positioning portion are provided with the second stator core. It may be arranged on the pedestal so as not to interfere. Accordingly, the two protrusions of the first and second positioning portions are engaged with the ears of the first and second stator cores, and the rotation of the first or second stator core can be favorably regulated during conveyance. Becomes

It is a top view showing an example of a stator core conveyed using a conveyance palette of this indication. It is a perspective view which illustrates the coil assembled in the stator core of FIG. It is a perspective view which shows the conveyance pallet of this indication. It is a top view which shows the conveyance pallet of this indication. FIG. 6 is a perspective view showing a state in which the transfer pallet of the present disclosure supports a small-diameter first stator core. FIG. 6 is a perspective view showing a state in which the transfer pallet of the present disclosure supports a large-diameter second stator core.

  Next, modes for carrying out the invention of the present disclosure will be described with reference to the drawings.

  FIG. 1 is a plan view showing an example of a stator core SC that is transported using the transport pallet 1 of the present disclosure. The stator core SC shown in FIG. 1 constitutes, together with the coil C shown in FIG. 2, a stator of a three-phase AC electric motor (rotating electric machine) mounted in, for example, an electric vehicle or a hybrid vehicle. In the present embodiment, the stator core SC is formed, for example, by stacking a plurality of electromagnetic steel plates formed in a substantially annular shape by pressing and connecting them in the stacking direction by caulking, and has an annular shape as a whole. However, the stator core SC may be integrally formed, for example, by pressing and sintering ferromagnetic powder.

  As shown in FIG. 1, a plurality of stator cores SC (in this embodiment, at intervals of 24 °, for example) project radially inward from the annular yoke portion Y (outer peripheral portion) at circumferential intervals (at equal intervals). 15 teeth) and a plurality of (15 in this embodiment, for example, 24 at intervals of 24) core slots S formed between adjacent teeth T. Further, the stator core SC has a plurality of (three, for example, 120 ° intervals in the present embodiment) ear portions (protruding portions) E that project radially outward from the outer peripheral surface at intervals (at equal intervals) in the circumferential direction. including. Each ear portion E has a convex curved outer peripheral surface that smoothly continues to the outer peripheral surface (cylindrical surface) of the stator core SC, and each ear portion E is formed with a bolt hole (through hole) H. A bolt screwed into a screw hole formed in a housing (not shown) of the rotating electric machine is inserted into the bolt hole H of each ear portion E, and the stator core SC, that is, the stator is fixed (fastened) to the housing by the bolt.

  As shown in FIG. 2, the coil C is a concentrated winding type rectangular coil (cassette) formed by winding a single rectangular wire W into, for example, two rows and a plurality of steps (for example, 10 steps) while being bent in the edgewise direction. Coil). Further, a short lead wire portion (terminal portion) L extends from one end of the coil C, and a long bus bar portion (crossover wire) B extends from the other end. As shown in FIGS. 1 and 2, the coil C is assembled with a plurality of teeth T of the stator core SC together with an insulator I made of resin, for example, by a coil mounting device (not shown). Then, the bus bar portion B of the coil C is electrically connected (welded) to the corresponding lead wire portion L of the other coil C, thereby forming a U-phase, V-phase, and W-phase stator coil. However, the coil that constitutes the stator together with the stator core SC may be formed by electrically joining a plurality of segment coils that are inserted into the plurality of core slots S.

  FIG. 3 is a perspective view showing the transfer pallet 1 of the present disclosure, and FIG. 4 is a plan view showing the transfer pallet 1. The transfer pallet 1 is capable of coaxially supporting two types of stator cores SC having different outer diameters so as not to rotate during transfer. Hereinafter, of the two types of stator cores SC, one of the smaller diameters is referred to as a “first stator core SC1” (see a chain line in FIG. 4) and the other of the larger diameters is referred to as a “second stator core SC2” (two points in FIG. 4). See the chain line). The second stator core SC2 has an outer diameter and a dimension such as a length from the shaft center to the ear portion E2 (the center of the bolt hole H or the outer peripheral end of the ear portion E2) set larger than those of the first stator core SC1. is there. The first and second stator cores SC1 and SC2 have basically the same structure except that the various sizes are different, and the arrangement pitch of the tooth portions T of both (in the present embodiment, for example, 24 °. ) Are identical to each other.

  As shown in FIGS. 3 and 4, the transport pallet 1 includes a base member 10 formed of a metal or the like in a rectangular flat plate shape, a plurality of first positioning portions 11 arranged on the base member 10, and a base member. And a plurality of second positioning portions 12 arranged on the surface 10. The base member 10 allows passage of the coil mounting device described above, and allows the coil C and the insulator I assembled to the first and second stator cores SC1 and SC2 to project downward from the lower surface of the first stator core SC1 and the like. Therefore, the base member 10 is formed with an opening 10H centered on a predetermined center point O. The contour of the opening 10H is determined in consideration of the operating range of the coil mounting device and the like. In addition, a pair of handles 15 are attached to the base member 10 so that an operator can carry the transport pallet 1.

  As shown in FIGS. 3 and 4, the plurality of first positioning portions 11 are arranged on the base member 10 so as to be lined up at intervals in the circumferential direction around the center point O along the opening 10H. The first positioning portion 11 corresponds to the small-diameter first stator core SC1. The number of the first positioning portion 11 is equal to the number of the ears E1 of the first stator core SC1 (three in the present embodiment). It is the same number. In the present embodiment, each first positioning portion 11 includes a first pedestal 11 s fixed to the upper surface of the base member 10 and two first pedestals 11 that protrude upward from the upper surface of the first pedestal 11 s at intervals in the circumferential direction. 1 protrusion 11p is included. The plurality of first pedestals 11s are arranged on a circle around the center point O so that a part of the upper surface of the first pedestal 11s can contact a part of the bottom surface of the first stator core SC1 (bottom surface of the ear portion E1). They are arranged at equal intervals (120 ° intervals in this embodiment). In addition, the two first protrusions 11p are formed in a round bar shape in the present embodiment, and are located at different positions on the outer peripheral surface (convex curved surface) of the ear portion E1 of the first stator core SC1 without interfering with the second stator core SC2. Are arranged at intervals on the circumference centered on the center point O so that they can come into contact with each other from the outside.

  The second positioning portion 12 corresponds to the large-diameter second stator core SC2, and the number of the second positioning portion 12 is the number of the ears E2 of the second stator core SC2 (three in the present embodiment). Is the same as. As shown in FIGS. 3 and 4, each of the second positioning portions 12 is provided with a second pedestal 12s fixed to the upper surface of the base member 10 and an upper portion of the second pedestal 12s with a circumferential interval from the upper surface of the second pedestal 12s. It includes two projecting round bar-shaped second projections 12p. The height of the second pedestal 12s (the height from the upper surface of the base member 10 to the upper surface of the second pedestal 12s) is the height of the first pedestal 11s of the first positioning portion 11 (the upper surface of the base member 10 to the first pedestal). The height to the upper surface of 11s) is the same. The height of the second protrusion 12p (the height from the upper surface of the second pedestal 12s to the upper end of the second protrusion 12p) is the height of the first protrusion 11p of the first positioning portion 11 (the upper surface of the first pedestal 11s). To the upper end of the first protrusion 11p).

  The second pedestal 12s of each second positioning portion 12 has the first and second stator cores SC1 and SC2 on one side (clockwise side in FIG. 4) in the circumferential direction of the corresponding first pedestal 11s of the first positioning portion 11. The teeth portions T are arranged so as to be displaced by an angle (for example, 24 ° in this embodiment) corresponding to the arrangement pitch of the teeth portions T. In addition, the second pedestal 12s of each second positioning portion 12 has the first positioning portion so that a part of the upper surface of the second pedestal 12s can come into contact with a part of the bottom surface of the second stator core SC2 (bottom surface of the ear portion E2). The first pedestals 11s of 11 are arranged at equal intervals (120 ° intervals in the present embodiment) on a circumference centered on a center point O having a diameter larger than the circumference. Further, the two second protrusions 12p of each second positioning portion 12 are arranged so that they can come into contact with different positions on the outer peripheral surface (convex curved surface) of the ear portion E2 of the second stator core SC2 from the outside. The first protrusions 11p of 11 are arranged at intervals on a circumference centered on a center point O having a diameter larger than that of the circumference. As a result, the plurality of second positioning portions 12 are circumferentially spaced from the first positioning portion 11 in the circumferential direction along the opening 10H so as to be circumferentially spaced around the center point O. It is arranged on the base member 10 while being shifted.

  When the small-diameter first stator core SC1 is transported using the transport pallet 1 configured as described above, as shown in FIG. 5, each ear portion E1 of the first stator core SC1 corresponds to the corresponding first pallet of the transport pallet 1. It is placed on the first pedestal 11s of the first positioning portion 11 so as to come into contact with the two first protrusions 11p of the first positioning portion 11. As a result, the bottom surface of each ear portion E1 of the first stator core SC1 is supported by the corresponding first pedestal 11s of the first positioning portion 11, and the outer peripheral surface of each ear portion E1 has two outer surfaces of the first positioning portion 11. Engages with the first protrusion 11p. As a result, the first stator core SC1 is supported by the transfer pallet 1 so that the axis passes through the center point O, and the plurality of first positioning portions 11 that engage with the corresponding ears E1 respectively move the first stator core SC1 during transfer. The rotation of the stator core SC1 can be well regulated.

  Further, when the large-diameter second stator core SC2 is conveyed using the transfer pallet 1, as shown in FIG. 6, each ear portion E2 of the second stator core SC2 is connected to the corresponding second positioning portion 12 of the transfer pallet 1. Is placed on the second pedestal 12s of the second positioning portion 12 so as to come into contact with the two second protrusions 12p. As a result, the bottom surface of each ear portion E2 of the second stator core SC2 is supported by the second pedestal 12s of the corresponding second positioning portion 12, and the outer peripheral surface of each ear portion E2 is the same as that of the two second positioning portion 12. It engages with the second protrusion 12p. As a result, the second pallet core SC2 having an outer diameter different from that of the first stator core SC1 is passed through the center point O, that is, the first stator core SC1 while suppressing the cost increase of the transport pallet 1 by eliminating the movable portion, that is, the first stator core SC1. The carrier pallet 1 can be supported coaxially with the stator core SC1. Then, the plurality of second positioning portions 12 engaging with the corresponding ear portions E2 can favorably restrict the rotation of the second stator core SC2 during the conveyance.

  Further, in the transport pallet 1, the height of the first pedestal 11s of the first positioning portion 11 that supports the bottom surface of the first stator core SC1 and the height of the second pedestal 12s of the second positioning portion 12 that supports the bottom surface of the second stator core SC2. Can be aligned with height. Therefore, it is possible to suppress the height from the bottom surface of the transfer pallet 1 to the upper end surfaces of the first and second stator cores SC1 and SC2 during transfer, thereby suppressing an increase in the size of the equipment. Further, the transfer pallet 1 is formed with the opening 10H as described above, and by positioning the transfer pallet 1 supporting the first or second stator cores SC1 and SC2 with respect to the coil mounting device, the transfer pallet is positioned. The coil C and the insulator I can be assembled to the first or second stator core SC1 or SC2 positioned with respect to 1. Then, the first positioning portion 11 and the second positioning portion 12 are arranged on the base member 10 while being offset by an angle corresponding to the arrangement pitch of the tooth portions T of the first and second stator cores SC1 and SC2. Therefore, since a common coil mounting device can be used when assembling the coil C and the like to the first and second stator cores SC1 and SC2, the facility cost can be reduced.

  As described above, the transfer pallet 1 according to the present disclosure supports the base member 10 and a part of the bottom surface of the first stator core SC1 and the base pallet so as to engage with the ears E1 of the first stator core SC1 from the outside. The base member 10 supports the plurality of first positioning portions 11 arranged on the member 10 and a part of the bottom surface of the second stator core SC2, and engages the ears E2 of the second stator core SC2 from the outside. And a plurality of second positioning portions 12 arranged. Further, the plurality of first positioning portions 11 corresponding to the small-diameter first stator cores SC1 are arranged on the base member 10 so as to be arranged at intervals in the circumferential direction around the predetermined center point O. Further, the plurality of second positioning portions 12 corresponding to the large-diameter second stator core SC2 are arranged on the one side in the circumferential direction from the first positioning portion 11 so as to be arranged around the center point O at intervals in the circumferential direction. And is arranged on the base member 10 while being displaced radially outward. As a result, the first and second stator cores SC1 and SC2 having different outer diameters are supported on the transfer pallet 1 while suppressing cost increase, and rotation of the first and second stator cores SC1 and SC2 is restricted during transfer. It becomes possible.

  The first and second positioning portions 11 and 12 described above include the first or second pedestals 11s and 12s that support a part of the bottom surface of the first or second stator cores SC1 and SC2, and the first or second stator cores. It includes two first or second protrusions 11p, 12p protruding circumferentially from the first or second pedestal 11s, 12s so as to contact the outer peripheral surfaces of the ears E1, E2 of SC1, SC2. However, the configurations of the first and second positioning portions 11 and 12 are not limited to this. That is, engagement with the first and second positioning portions 11 and 12 including concave curved surfaces that engage with the outer peripheral surfaces (convex curved surfaces) of the ears E1 and E2 instead of the first and second projections 11p and 12p. Parts may be provided. In addition to the first and second stator cores SC1 and SC2, the transport pallet 1 may be configured to be able to support one or more stator cores having different sizes.

  Further, it goes without saying that the invention of the present disclosure is not limited to the above-described embodiment, and various modifications can be made within the scope of the extension of the present disclosure. Furthermore, the above embodiment is merely one specific form of the invention described in the summary of the invention, and does not limit the elements of the invention described in the summary of the invention.

  INDUSTRIAL APPLICABILITY The invention of the present disclosure can be used in the field of manufacturing rotary electric machines.

  DESCRIPTION OF SYMBOLS 1 conveyance pallet, 10 base member, 10H opening part, 11 1st positioning part, 11p 1st protrusion, 11s 1st pedestal, 12 2nd positioning part, 12p 2nd protrusion, 12s 2nd pedestal, 15 handle, B bus bar part , C coil, E, E1, E2 ear, H 2 bolt hole, I insulator, L lead wire portion, S core slot, SC1 first stator core, SC2 second stator core, T tooth portion, W flat wire.

Claims (1)

A first stator core including a plurality of ears protruding outward from the outer peripheral surface at intervals in the circumferential direction, and a plurality of ears protruding outward from the outer peripheral surface at intervals in the circumferential direction, and a shaft. A transport pallet capable of supporting both a second stator core whose length from the core to the ear is set to be longer than that of the first stator core,
A base member,
The base members are arranged so as to be arranged at intervals in the circumferential direction around a predetermined center point, support a part of the bottom surface of each of the first stator cores, and support the ears of the first stator cores. A plurality of first positioning portions that engage from the outside,
The first positioning portion is arranged on the base member so as to be lined at intervals in the circumferential direction around the center point, and is arranged on the one side in the circumferential direction and radially outward, and the bottom surface of each of the second stator cores is arranged. A plurality of second positioning portions that support a part of the second stator core and are engaged with the ears of the second stator core from the outside.
A transport pallet equipped with.