JP2007312559A - Rotary machine with terminal module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress floating of a terminal module from an installation surface at the positioning a rotary machine having a terminal module. <P>SOLUTION: A positioning hole 16 is provided in the installation surface 18 of a stator core 10, a positioning pin 30 is provided on the surface 28 facing the installation surface 18 in a terminal module 20, and a recess 32 is provided around the positioning pin 30. When the installation surface 18 and the facing surface 28 are made to face, the positioning hole 16 and the positioning pin 30 are aligned and the terminal module 20 is pressed against the stator core 10 with a pushing force F, the positioning pin 30 is cut, to produce a surplus member 40 which is introduced into a recess 32 provided around the positioning pin 30, and floating of the abutting surface of the installation surface 18 and the facing surface 28 will not occur. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a rotating machine having a terminal module, and more particularly to a rotating machine having a terminal module connected to each phase winding of a stator.

  When a plurality of phase windings are arranged in a stator like a multiphase motor, a connection module called a terminal module is used to connect each phase winding to a terminal block. For example, in the case of a three-phase, 12-pole concentrated winding type motor, the stator is provided with 12 salient poles, and the U-phase, V-phase, and W-phase windings are arranged in accordance with the driving method. It is wound around a salient pole. In this case, since each phase winding is wound around four salient poles, it is necessary to connect the lead terminals of these four windings to one of the phase terminals of the terminal block. The terminal module is for that purpose. As an example, a terminal module in which a bus bar for each phase is annularly arranged on the outer peripheral side of the stator core is used.

  For example, in Patent Document 1, as a structure that effectively dissipates heat generated in a winding of an electric motor, winding ends of the winding are connected to a plurality of bus bars made of a ring-shaped conductive material, and the plurality of bus bars are connected. Further, it is disclosed that the insulating plate is laminated in the axial direction of the output shaft of the electric motor, and the outer peripheral surface thereof is brought into close contact with the housing via the insulating member.

  Patent Document 2 discloses a bus bar of a thin brushless motor for a vehicle that includes a terminal portion that protrudes from the outer peripheral side of a ring-shaped main body and a tab that protrudes from the inner peripheral side. Here, the terminal portion is electrically connected to the battery via an electric wire, and the tab is electrically connected to one end of each winding. The ring-shaped bus bar is formed in a substantially C shape by bending a copper plate punched in a strip shape in the thickness direction in advance, and the bus bar of each phase is individually inserted into the holding groove of the insulating holder. Yes. In addition, since the bus bars of each phase are laminated in the radial direction in this way, it is stated that the terminal portion of the bus bar arranged on the inner side protrudes outward so as not to contact the outer bus bar. Yes.

  Further, in Patent Document 3, a bus bar used for connecting windings wound around a stator core of a motor is conventionally stacked with four bus bars of U, V, W, and N in the axial direction. In response to the problem that it cannot be realized, a structure is disclosed in which annular ring conductors are used and are arranged on the same center and on the same plane.

JP 2005-65374 A JP 2003-134724 A WO2004 / 10562 International Publication

  Thus, by using the terminal module, the structure for connecting the multi-phase windings to each phase terminal of the terminal block is simplified, and a multi-phase rotating machine such as a multi-phase motor or a multi-phase generator is provided. Assembling becomes easy. As described above, the terminal module of the prior art arranges bus bars corresponding to a plurality of phases on the outer peripheral side of the stator core, and caulking terminals for connecting the lead terminals of the respective windings together with the terminals connected to the terminal block to each bus bar. Often, the one provided with is used. Then, the connection between each winding of the stator core and the crimping terminal of the terminal module is performed manually, for example. In that case, simple positioning is performed in order to determine the relative positions of the stator core and the terminal module. For example, loose pins and holes are provided between the stator core and the terminal module to perform rough positioning, and then the lead terminals of the windings corresponding to the crimping terminals are connected.

  As ease of assembly of the rotating machine is required, it is considered to automate the connection of the lead terminals of the windings in the terminal module. In this case, improvement in positioning accuracy between the terminal module and its installation surface is required. One well-known positioning technique is to fit the positioning pin precisely into the positioning hole. In this case, it is preferable that the positioning pin is caulked and inserted into the positioning hole. Here, when the pin is caulked and inserted into the hole, the pin or hole is scraped, and the shaving residue enters between the terminal module and the installation surface, so that the terminal module may float with respect to the installation surface. is there. If the terminal module floats with respect to the installation surface, the positioning between the winding and the terminal module becomes inaccurate, which may hinder automation.

  The objective of this invention is providing the rotary machine which has a terminal module which can suppress that a terminal module floats with respect to an installation surface in the case of positioning.

  A rotating machine having a terminal module according to the present invention is a terminal module in which a plurality of bus bars are stacked with an insulating layer interposed therebetween, a terminal module in which each bus bar is connected to each corresponding phase winding of the stator, and a terminal The module installation surface for installing the module, the opposing surface facing the module installation surface of the terminal module, the positioning means provided between the module installation surface, and the vicinity of the positioning means on the module installation surface or the opposing surface facing the module installation surface And a lifting prevention means for preventing the lifting between the terminal module and the installation surface caused by positioning.

  Moreover, in the rotating machine having the terminal module according to the present invention, it is preferable that the lifting prevention means is an accommodation means for accommodating an excess member generated by the positioning means when the terminal module is installed on the installation surface.

  Moreover, in the rotating machine having the terminal module according to the present invention, it is preferable that the lifting prevention means is a depression provided in the vicinity of the positioning means.

  In the rotating machine having the terminal module according to the present invention, the positioning means preferably includes a positioning pin and a positioning hole into which the positioning pin is press-fitted.

  In the rotating machine having the terminal module according to the present invention, it is preferable that the installation surface of the terminal module is a flat surface of the stator core.

  In the rotating machine having the terminal module according to the present invention, each phase winding of the stator is preferably wound by a concentrated winding method.

  With the above configuration, since the floating prevention structure is provided in the vicinity of the positioning means on the module installation surface or the surface facing the module installation surface, it is possible to suppress the terminal module from floating with respect to the installation surface during positioning.

  In addition, when the terminal module is installed on the installation surface, there is provided a storage unit that stores the surplus member generated by the positioning unit, so that the terminal module floats with respect to the installation surface by the surplus member such as shavings generated at the time of positioning. Can be suppressed.

  Further, since the recess is provided in the vicinity of the positioning means, it is possible to suppress the terminal module from floating with respect to the installation surface during positioning with a simple structure.

  Further, since the positioning pin and the positioning hole into which the positioning pin is press-fitted are used as the positioning means, positioning can be performed with a simple structure, and the terminal module can be prevented from floating with respect to the installation surface.

  Further, since the installation surface of the terminal module is a flat surface of the stator core, the terminal module can be installed while suppressing floating with respect to the stator core.

  Further, since each phase winding of the stator is wound by the concentrated winding method, in the concentrated winding method rotating machine, the terminal module can be suppressed from floating with respect to the installation surface, and the winding connection can be automated.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Hereinafter, a three-phase 12-pole stator motor using a stator having 12 salient poles will be described as a rotating machine to which the terminal module is applied. However, an electric motor using a stator having other salient pole numbers may be used. . In addition, since the basic configuration of the electric motor and the generator is the same, the term “rotor” below includes the electric motor, the electric generator, and the electric / generator combined machine in terms of functionality. The rotating machine may be of any winding type as long as it uses a terminal module. Therefore, it may be a concentrated winding type rotating machine having a terminal module or a distributed winding type rotating machine having a terminal module. Further, the shapes, dimensions, materials, and the like described below are examples, and can be appropriately changed so as to conform to the specifications of the rotating machine.

  FIG. 1 is a diagram illustrating a state in which the terminal module 20 is positioned and attached to the installation surface of the stator core 10. The terminal module 20 is a connection member having a function of connecting the windings of each phase to the terminal block. FIG. 1A shows the terminal module 20 as viewed from the side attached to the stator core 10 in a state immediately before the terminal module 20 is attached on the stator core 10. FIG. 2B is a diagram illustrating a state in which the terminal module 20 is positioned and attached on the stator core 10. The stator core 10 is formed by punching and laminating electromagnetic steel sheets in a predetermined shape, and has a plurality of salient poles 14 on the inner peripheral side of an annular outer shape. In each of the salient poles, windings corresponding to the specifications of the rotating machine are wound in a later process to form a stator of the rotating machine. The stator is assembled to a rotating machine case or the like together with a rotor (not shown) to become a rotating machine. In FIG. 1, since 12 salient poles 14 are shown, this is a stator core 10 used in, for example, a three-phase 12-pole concentrated winding motor. The flat upper surface of the stator core 10 is used as an installation surface 18 for assembling the terminal module 20. The plurality of positioning holes 16 provided in the installation surface 18 are holes used for positioning with the terminal module 20. FIG. 1 also shows a plurality of mounting holes for positioning and mounting on a rotating machine not shown here.

  The terminal module 20 has the following configuration. That is, it has the main-body part 22 which is a 12 angle | corner annular member which has 12 sides. The main body portion 22 is formed by bending a belt-like plate material into a dodecagonal ring shape as a bus bar for each phase, and an insulating layer for four bus bars of U phase, V phase, W phase, and N phase for common electrodes. Those sandwiched in the radial direction can be used. The bus bar for each phase in the main body 22 has a plurality of terminal portions 24 for connection with lead portions of the respective windings at predetermined positions, and is connected to each phase terminal of the terminal block 25. In the terminal module 20, a surface opposite to the side on which the terminal portion 24 is provided is insulated, and this surface serves as a facing surface 28 facing the installation surface 18 of the stator core 10. A positioning portion 26 is provided on the facing surface 28 corresponding to the positioning hole 16 of the stator core 10. The positioning part 26 has a positioning pin corresponding to the positioning hole 16 and a recess provided in the periphery thereof.

  FIG. 2 is a top view of a state in which the terminal module 20 is positioned and attached to the stator core 10. Here, illustration of the plurality of terminal portions 24 of the terminal module 20 is omitted. As shown here, the positioning hole 16 and the positioning portion 26 are provided at three locations at substantially equal intervals along the annular shape of the terminal module 20. For accurate positioning, it is preferable that two of the three places are crimped fits and the rest are loose fits. Three or more positioning locations may be used, but even in that case, it is preferable that two locations should be crimped and the rest should be loose fit. The crimping fit may be a precise fit.

  FIG. 3 is a diagram for explaining the relationship between the positioning hole 16 of the stator core 10 and the positioning portion 26 of the terminal module 20. FIG. 3A shows the stator core 10 and the terminal module 20 as viewed from the side. Here, it is shown that the installation surface 18 of the stator core 10 and the facing surface 28 of the terminal module 20 face each other. ing. In FIG. 3B, a top view showing a state of the installation surface 18 of the stator core 10 and a bottom view showing a state of the facing surface 28 of the terminal module 20 are shown in comparison.

  The positioning portion 26 provided on the facing surface 28 of the terminal module 20 includes a positioning pin 30 and a recess 32 provided around the positioning pin 30. The positioning pin 30 corresponds to the positioning hole 16 provided in the installation surface 18 of the stator core 10 and has an outer diameter shape that is slightly larger than the inner diameter shape of the positioning hole 16. The recess 32 is a groove provided around the base of the positioning pin 30. Here, the positioning pins 30 provided in the terminal module 20 and the positioning holes 16 provided in the stator core 10 constitute positioning means used for positioning between the terminal module 20 and the stator core 10. The indentation 32 is a structure for preventing the lifting from being provided in the vicinity of the positioning means, and corresponds to a lifting prevention means for preventing the lifting between the terminal module 20 and the installation surface 18 caused by positioning.

  In FIG. 3, the positioning hole 16 is shown as a round hole, the positioning pin 30 is shown as a round bar, and the recess 32 is shown as an annular groove, but other shapes may be used. For example, the positioning hole 16 may be a polygonal cross-section hole, and the positioning pin 30 may be a corresponding polygonal cross-section rod. Besides a polygonal cross section, an elliptical cross section or a cross section combining these may be used. As long as the recess 32 is recessed along the entire outer periphery of the positioning pin 30, the planar shape may be a polygon, an oval, or a combination thereof.

  As an example of dimensions, the positioning hole 16 is a nominal 4 mm hole, the positioning pin 30 is a nominal 4 mm round bar, and the outer diameter of the positioning pin 30 is about several μm to 10 μm with respect to the inner diameter of the positioning hole 16. Make it larger. Thereby, the fitting between the positioning pin 30 and the positioning hole 16 can be an appropriate crimp. This dimension is an example for explanation, and an appropriate caulking fit tolerance can be set according to the material of the stator core 10, the material of the positioning pin 30, the size of the nominal dimension, and the like. In the above example, the depth of the positioning hole 16 is about 4 mm to about 7 mm, and the height of the positioning pin 30 from the facing surface 28 is shorter than the depth of the positioning hole 16.

  The positioning pin 30 and the recess 32 can be formed by integral molding when the terminal module 20 is molded of an insulating material. For example, polyphenylene sulfide (PPS) can be used for forming the insulating material of the terminal module 20. Of course, the terminal module 20 may be formed as having a flat facing surface 28, and then the recess 32 may be additionally processed, and the positioning pin 30 may be implanted.

  The recess 32 is a storage space having a function of storing surplus members such as shavings generated when the positioning pin 30 is pushed into the positioning hole 16 for positioning. For example, if the fitting tolerance is 10 μm and the length pushed into the positioning hole 16 of the positioning pin 30 is 5 mm, the surplus member is positioned for positioning by the volume integral obtained by multiplying the diameter difference corresponding to the fitting tolerance by the pushing length. Arise. Therefore, the size of the indentation 32 only needs to be sufficient to accommodate the volume of the surplus member. In the dimension example such as the positioning pin 30 described above, the size of the recess 32 may be about 6 mm to about 8 mm in diameter and about 0.5 mm to about 1 mm in depth. As described above, when the stator core 10 is made of an electromagnetic steel plate and the positioning pin 30 is made of PPS, the positioning pin 30 is shaved by the electromagnetic steel plate, and the shavings are stored in the recess 32.

  This is shown in FIG. 4A shows a state immediately before the positioning pin 30 of the terminal module 20 is pushed into the positioning hole 16 of the stator core 10, FIG. 4B shows a state where the positioning pin 30 is completely inserted into the positioning hole 16, and FIG. It is a figure which shows a mode when it is pushed in. In FIG. 4A, the installation surface 18 of the stator core 10 and the facing surface 28 of the terminal module 20 face each other, the positioning holes 16 and the positioning pins 30 are aligned, and the terminal module 20 is positioned relative to the stator core 10. When pressed by the pressing force F, as shown in FIG. 4B, the positioning pin 30 is scraped, and the surplus member 40 is generated according to the external dimension difference between the positioning pin 30 and the positioning hole 16. . The surplus member 40 is guided into a recess 32 provided around the positioning pin 30.

  FIG. 4C shows a state in which the positioning pin 30 is completely pushed into the positioning hole 16, and at this time, the recess 32 is recessed over the entire circumference along the outer shape of the positioning pin 30. Is introduced into the recess 32 as it is, and the accommodation volume of the recess 32 is sufficient, so that it does not overflow outside the recess 32. Therefore, the surplus member 40 does not float on the mating surface between the installation surface 18 of the stator core 10 and the facing surface 28 of the terminal module 20. As described above, the recess 32 has a structure for preventing the dent 32 from being lifted on the facing surface 28 of the terminal module 20 in the vicinity of the positioning pin 30 and the positioning hole 16 serving as positioning means.

  In the above description, the positioning pin is provided on the terminal module side and the positioning hole and the depression are provided on the stator core side. However, the positioning pin and the depression are provided on the stator core side, and the positioning hole is provided on the terminal module side. Good. Moreover, it is good also as a thing different from the element which provides a positioning pin, and the element which provides a hollow. For example, positioning pins may be provided in the terminal module, and positioning holes and indentations may be provided in the stator core. Further, the terminal module has been described as being installed on the stator core. However, the terminal module is assumed to be installed on an appropriate element other than that of the rotating machine. In that case, positioning holes for positioning are installed in the terminal module. Provided on the flat surface of the element.

In embodiment which concerns on this invention, it is a figure which shows a mode that a terminal module is positioned and attached to the installation surface of a stator core. In embodiment which concerns on this invention, it is a top view of the state in which the terminal module was positioned and attached to the stator core. In embodiment which concerns on this invention, it is a figure explaining the relationship between the positioning hole of a stator core, and the positioning part of a terminal module. In embodiment which concerns on this invention, it is a figure which shows a mode that the positioning pin of a terminal module is pushed into the positioning hole of a stator core.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Stator core, 14 Salient pole, 16 Positioning hole, 18 Installation surface, 20 Terminal module, 22 Main body part, 24 Terminal part, 25 Terminal block, 26 Positioning part, 28 Opposing surface, 30 Positioning pin, 32 Indentation, 40 Surplus member

Claims (6)

A terminal module in which a plurality of bus bars are stacked with an insulating layer interposed therebetween, and each bus bar is connected to each corresponding phase winding of the stator; and
A module installation surface for installing a terminal module;
Positioning means provided between a module installation surface and a facing surface facing the module installation surface of the terminal module;
A floating prevention structure provided in the vicinity of the positioning means on the module installation surface or the opposed surface facing the module installation surface, the floating prevention means for preventing the lift between the terminal module and the installation surface caused by positioning,
A rotating machine having a terminal module. In the rotating machine having the terminal module according to claim 1,
Lifting prevention means
A rotating machine having a terminal module, characterized in that the rotating device is a storing means for storing a surplus member generated by a positioning means when the terminal module is installed on the installation surface. In the rotating machine having the terminal module according to claim 2,
The rotating machine having a terminal module, wherein the lifting prevention means is a depression provided in the vicinity of the positioning means. In the rotating machine having the terminal module according to claim 1,
The positioning means is
A positioning pin;
A positioning hole into which the positioning pin is press-fitted, and
A rotating machine having a terminal module. In the rotating machine having the terminal module according to claim 1,
A rotating machine having a terminal module, wherein the module installation surface is a flat surface of a stator core. In the rotating machine having the terminal module according to any one of claims 1 to 5,
A rotating machine having a terminal module, wherein each phase winding of the stator is wound by a concentrated winding method.

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