JP2010110035A - Terminal cradle of ac rotating electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To miniaturize a terminal cradle or the like by improving a wire connecting structure of an AC rotating electric machine while maintaining the insulation state between terminals, resulting in miniaturization of a rotating electric machine. <P>SOLUTION: In connecting terminals through a calking process, of three-phase power lines and terminals of neutral lines of three-phase AC rotating electric machine to each of corresponding terminals 31U, 31V, 31W and 32 integrated by a module to a resin-made base 30a of a terminal cradle 30, the connection wires 31u, 31v, 31w, 32n are connected at staggering positions for the extension direction of each terminal, and a distance between a wire connecting portion of one terminal having the shortest distance between the adjacent terminals and a portion between a non-connecting portion of the other terminal is an insulation distance Lz. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a terminal block for connecting terminals of a plurality of power lines of an AC rotating electrical machine to terminals.

  In Patent Document 1, the terminals of the three-phase power line and neutral line (hereinafter referred to as a lead wire when combined) of a three-phase AC rotating electric machine are crimped to each terminal fixed to the terminal block and connected. Then, a technology is disclosed in which each of these terminals is connected to an external connection terminal fixed to the terminal block, and the terminal block is stored and fixed in a terminal block storage portion formed by protruding the stator storage case outward. ing.

Thus, by connecting to the external connection terminal via the terminal block, the connection position can be easily positioned, and the terminal processing can be performed efficiently.
JP 2008-125170 A

  By the way, each terminal to which each terminal of the lead wire is connected needs to secure an insulation state against a potential difference between adjacent terminals. Patent Document 1 also discloses that an insulating wall is provided between adjacent terminals of the terminal block to insulate, but the shape of the terminal block becomes complicated and the manufacturing cost increases.

  In this case, the connection part between the terminal of the lead wire and the terminal swells when the terminal and the terminal are united, and further, between the adjacent connection parts by performing a caulking process that is flattened along the terminal arrangement direction. Is the closest.

  Therefore, when an insulating wall or the like is not provided, it is necessary to secure a distance (insulating distance) that maintains the insulation state between the connection portions, and thereby, the terminal block, and thus, these can be placed in the case. Miniaturization of the rotating electrical machine to be stored is restricted.

  The present invention has been made by paying attention to such a conventional problem, and by improving the arrangement and shape of the connection portion of each terminal fixed to the terminal block with the lead wire terminal, The object is to reduce the size of the terminal block and thus the rotating electrical machine while maintaining the insulation state.

Therefore, according to a first aspect of the present invention, there is provided a terminal block for an AC rotating electrical machine in which each terminal of a plurality of power lines of the AC rotating electrical machine is connected and fixed to a plurality of terminals arranged in a row. Arranged so that the connection part side with the wire terminal is included in the substantially same plane, and the connection part is disposed at an offset position so that adjacent connection parts are not superposed in the extending direction of the terminal. It was set as the structure to do.

  Further, according to a second aspect of the present invention, in the same terminal block, the plurality of terminals are arranged so as to be included in substantially the same plane, and the plurality of terminals are substantially the same on the connection portion side with the power line terminal. The terminal of the power line is inserted into a cylindrical part formed on the terminal, and the connecting part is arranged so as to be included in the terminal, and the cylindrical part is perpendicular to or around the axis of each terminal with respect to the surface. It was set as the structure formed by crimping so that it may become flat along the direction which inclines.

  According to the first invention, the connection portions between the adjacent power line terminals are arranged at positions offset so as to be non-polymerized in the extending direction of the terminals, so that one of the adjacent ones in the terminal arrangement direction is arranged. Since the distance between the terminal connection part and the non-wire connection part of the other terminal only needs to be kept more than the insulation distance, the terminals can be brought close to each other and the insulation state between the terminals is maintained. However, it is possible to reduce the size of the terminal block, and hence the rotating electrical machine.

  According to the second invention, the connection portion of each terminal is flattened along a direction perpendicular to the axis of each terminal or a direction inclined to the same side with respect to the surface including the plurality of terminals by caulking. Therefore, the distance between the connection parts can be increased. As a result, the terminals can be brought close to each other, the distance between the terminals can be shortened while maintaining the insulation state between the terminals, and the terminal block and thus the rotating electrical machine can be downsized.

  Embodiments of the present invention will be described below with reference to the drawings. In the present embodiment, the present invention is applied to a three-phase AC rotating electric machine mounted on a hybrid vehicle or an electric vehicle. Of course, the invention is not limited to those applied to automobiles.

  FIG. 1 shows an outline of assembling a stator having lead wires connected by a terminal block according to the present invention into a three-phase AC rotating electric machine and connecting the rotating electric machine to an inverter.

  In the figure, a stator 11 has slots formed at predetermined intervals in an annular stator core 11a formed by laminating and integrally bonding a plurality of electromagnetic steel plates, and three phases (U , V, W phase) coils 11b are mounted.

  The stator 11 and the rotor 12 rotatably disposed at the center of the stator 11 are accommodated in a case 13 to constitute a three-phase AC rotating electrical machine 10.

  Each phase coil 11 b of the rotating electrical machine 10 is connected to a battery 15 via an inverter 14.

  And when the rotating electrical machine 10 functions as an electric motor for driving driving, etc., the DC power from the battery 15 is converted into three-phase AC power by the inverter 14, and then supplied to the coils 11b of each phase, The rotor 12 is rotated. Further, when the rotating electrical machine 10 functions as a generator during vehicle deceleration or the like, the three-phase AC power generated from the rotating electrical machine 10 is converted into DC power by the inverter 14 and stored in the battery 15.

  Here, a U-phase coil power wire 20U, a V-phase coil power wire 20V, a W-phase coil power wire 20W, and a neutral wire 21 are drawn out of the stator 11. Each terminal of these power lines 20U, 20V, 20W and neutral wire 21 is connected to each terminal 31U, 31V, 31W and 32 fixed to terminal block 30 for lead wire connection by caulking. The terminal block 30 is formed by integrating the terminals 31U, 31V, and 31W with a resin base 31a as a module.

  The terminals 31U, 31V, 31W are connected to the terminals 31u, 31v, 31w of the power lines 20U, 20V, 20W and the neutral wire 21 at the end portions protruding from one side edge of the base 31a and standing. 32n are formed, and bolt insertion holes for connecting to respective terminals of the terminal board 40 to be described later are formed at each end protruding from the other side edge of the base 31a.

  As shown in FIG. 2, a terminal board 40 is housed and fixed at a predetermined position by a pair of bolts 42 in a terminal block housing portion 13A formed by projecting a part of the case 13 outward.

  The terminal board 40 is formed by fixing the terminals 41U, 41V, 41W on the upper surface of the resin base 40a. Each terminal 41U, 41V, 41W is formed with a bolt insertion hole for connecting to the corresponding terminal 31U, 31V, 31W on the stator side.

  When the terminal block 30 is housed in a predetermined position in the terminal block housing portion 13A, the terminals 31U, 31V, 31W of each phase protruding from the edge of the terminal block 30 are connected to the terminals of the corresponding phases of the terminal board 40. It joins on 41U, 41V, 41W, and it connects by fastening through the bolt 43 to the bolt insertion hole which overlaps. The terminals 41U, 41V, 41W of the terminal board 40 are connected to the power lines 14U, 14V, 14W of the respective phases drawn out from the inverter 14 via the connector 16 (see FIG. 1).

  Next, the lead wire connection structure in the terminal block 30 will be described in detail.

  FIG. 3 shows details of the terminals 31 and 32 of the terminal block 30. A terminal formed by stamping a copper plate or the like having high conductivity with a press has one end constituting a connection portion extending in a band shape in a direction perpendicular to the axial direction, and the other end is provided with the bolt insertion hole 31b, 32b is formed.

  The belt-shaped portion is rounded and both end edges are fixed to each other by brazing or the like to form a cylindrical portion 31b, and the intermediate portion is bent 90 ° into an L shape, and each terminal 31U, 31V, 31W and 32 is In a state where the connection portion side with the lead wire terminal is arranged so as to be included in substantially the same plane, a portion from the vicinity of the bent portion to the front side of the bolt insertion hole is molded by the resin base 31a.

  In the stator 11 composed of three-phase coils with classified windings, each power line 20U, 20V, 20W is composed of a bundle of about 24 to 36 enamel wires, and each end of these power lines 20U, 20V, 20W (enamel) After the wire bundles 20u, 20v, and 20w are inserted into the cylindrical portions 31b of the terminals 31U, 31V, and 31W for the power lines, the cylindrical portion 31b is placed on the surface including the terminals 31U, 31V, 31W, and 32. Caulking and connecting are performed so that a flat surface is formed along.

  On the other hand, the neutral wire 21 is a cylindrical portion of the terminal 32 for the neutral wire 21, which is a terminal (bundle of enamel wires three times the power wire) 21 n that gathers three wires (three phases) drawn from the neutral point. After being inserted into 32b, the cylindrical portion 32b is similarly crimped and connected.

  Here, in this embodiment, as shown in FIG. 4, the connection of each terminal 31U, 31V, 31W, 32 connected with each terminal 20u, 20v, 20w, 21n of the three power lines 20 and the neutral line 21. The portions 31u, 31v, 31w, and 32n are arranged so that the height from the base 31a is alternately a high position and a low position.

  Specifically, the connection portions 31u, 31v, 31w, and 32n are alternately arranged on two parallel lines that are perpendicular to the extending direction of each terminal along the plane including the plurality of terminals 31U, 31V, 31W, and 32. The adjacent connection portions 31u and the connection portions 31v, the connection portions 31v and the connection portions 31w, and the connection portions 31w and the connection portions 32n are offset so that they are non-polymerized in the extending direction of each terminal. Arrange.

  Specifically, as shown in FIG. 3, the lengths from the bent portions of the terminals 31U, 31V, 31W and 32 to the cylindrical portions 31c and 32c forming the connection portions are alternately different lengths L1 and L2. It is constituted by.

  As described above, each connection part is arranged, and the part that is the shortest distance between adjacent terminals in the terminal arrangement direction is a part between the connection part of one terminal and the non-connection part of the other terminal. To be set.

  In this way, as shown in FIG. 4 (A), the shortest distance may be set as the insulation distance Lz. Therefore, as shown in the conventional example of FIG. Compared with the case where the connection portions are overlapped to form the shortest distance between the connection portions, the length in the terminal arrangement direction can be reduced by Δa, and the terminal block 30 and thus the rotating electrical machine 10 can be reduced in size. In addition, it is made for adjacent connection parts to leave | separate more than the insulation distance Lz also in the extending direction of a terminal.

  5 (A) and 5 (B) show the second and third embodiments, and show a state viewed from above the connecting portion.

  In the second embodiment shown in FIG. 5A, the connection portions 51u, 51v, 51w and 52n of the terminals 51U, 51V, 51W and 52 connected to the power lines 20U, 20V and 20W and the neutral line 21 are as follows. Although the height of the terminal block 50 from the base 50a is the same, the flat surfaces formed by caulking the connection portions 51u, 51v, 51w and 52n have terminals 51U, 51V, It caulks so that it may become flat in the direction at right angles around the axis of each terminal with respect to the surface including the connection part side of 51W and 52. FIG.

  In the third embodiment shown in FIG. 5B, the connection portions 51u ′, 51v ′, 51w ′ and 52n ′ are arranged around the axis of each terminal with respect to the surface including the terminals 51U, 51V, 51W and 52. It caulks so that it may become flat in the direction which inclines to the same side.

  Note that, as in the second and third embodiments, even when the direction of flattening is changed by caulking, the brazed portion of the cylindrical portion constituting the connection portion may be set so as not to overlap the bending position. Desirable in strength.

  With the above configuration, the distance between adjacent connection portions 51u, 51v, 51w and 52n (51u ′, 51v ′, 51w ′ and 52n ′) increases, and non-connection on the base 50a (50a ′) side from the connection portion. Since the distance between the parts can be set to the shortest distance and the shortest distance can be set to the insulation distance Lz, the length in the terminal arrangement direction can be shortened by Δb, and the terminal block and thus the rotating electrical machine can be further miniaturized.

  Moreover, since the above embodiment is a structure which does not have the insulation wall between terminals, etc., manufacturing cost can also be suppressed.

  Furthermore, in the above embodiment, since the terminals for connecting the lead wire terminals are integrated by the terminal blocks 30 and 50, the terminals can be easily aligned and connected to the terminals of the terminal board 40. If an engaging portion for positioning the terminal blocks 30, 50, 50 'and the terminal base 40 is formed on the inner wall of the terminal block storage portion 13A, the attaching operation can be easily performed.

  On the other hand, as a terminal block with a configuration in which each terminal connected to the lead wire terminal is directly connected and fixed to each terminal of the terminal base fixed to the terminal block storage part by bolting or the like. Even in this case, positioning and fixing can be performed while maintaining the insulation state by setting the position of the connection portion of each terminal to the lead wire terminal and the direction of flattening as in the above embodiments.

  Further, in the above-described embodiment, the connection portions of the plurality of power line terminals and the neutral wire terminals are arranged in a line so as to be on the same surface, and are adjacent to the connection portions of the neutral wire terminals. The power line terminals are also arranged in the same arrangement or flattened direction as the multiple power line terminals, so that they can be formed in a simple structure, and the manufacturing cost of the terminal block can be reduced. .

  On the other hand, as described above, the end of the neutral wire is crimped to the enamel wire bundle that is three times the power line, so that the connection portion may be larger than the power line, and the power line terminal is connected to the inverter side terminal. It is necessary to connect, especially in the case of a structure that is simply connected via a connector, etc., but there is a need to arrange in a row, while the neutral wire terminal does not need to be connected to the inverter side terminal In particular, it is not necessary to arrange them in the same row as the power line terminals.

  Therefore, for example, as in the fourth embodiment shown in FIG. 6, only the neutral wire terminal 62 is brought closer to the case 13 side with respect to the surface including the power line terminals 61U, 61V, 61W of the terminal block 60. The insulation distance Lz between the neutral wire terminal 62 and the adjacent power line terminal 61W may be ensured by arranging it at an offset position. In this case, the terminal block storage portion 13A is formed so that the protruding direction from the case 13 is offset with respect to the radial direction of the rotating electrical machine, thereby facilitating the layout of the terminals in the terminal block storage portion 13A. At the same time, the lateral width and depth of the terminal block storage portion 13A can be further shortened, and as a result, the rotating electrical machine can be stored compactly in a constrained space in the housing H. The case of projecting in the radial direction is shown).

The assembly exploded perspective view showing the schematic structure of the connection with the three-phase AC rotating electrical machine and the peripheral device according to the embodiment. It is a top view which shows the terminal block accommodating part of embodiment same as the above. The figure which similarly shows the process of a terminal and a terminal block formation to which a lead wire terminal is connected. The figure which shows the terminal block structure by the side of the stator concerning 1st Embodiment compared with a prior art example. The figure which shows the terminal block structure by the side of the stator concerning 2nd, 3rd embodiment compared with a prior art example. The top view which shows the outline | summary of arrangement | positioning in the terminal block storage part and the whole system of 4th Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Three-phase alternating current rotary electric machine, 11 ... Stator, 11a ... Stator core, 11b ... Coil, 13 ... Case, 13A ... Terminal block accommodating part, 14 ... Inverter, 14U, 14V, 14W ... Power line of inverter, 15 ... Battery, 16 ... Connector, 20U, 20V, 20W ... Power line, 20u, 20v, 20w ... Power line terminal, 21 ... Neutral line, 21n ... Neutral line terminal, 30 ... Stator side terminal block, 30a ... Base, 31U, 31V, 31W ... Terminals connected to each power line, 31b ... Cylindrical portion, 32 ... Terminals connected to neutral wires, 40 ... Terminal base, 41U, 41V, 41W ... Terminals on the inverter connection side, 42 ... Bolt, 43 ... bolt, 50 ... terminal base, 51U, 51V, 51W ... terminal connected to each power line, 52 ... terminal connected to neutral wire, 50 '... terminal base, 51U' 51V ', 51W' ... terminals connected to each power line, 52 '... terminals connected to neutral lines, 60 ... terminal block, 61U, 61V, 61W ... terminals connected to each power line, 62 ... medium Terminal connected to the sex wire,

Claims (8)

A terminal block of an AC rotating electrical machine that holds and fixes each terminal of a plurality of power lines of the AC rotating electrical machine to a plurality of terminals arranged in a row,
The plurality of terminals are arranged so that the connection part side of the terminals with the power line terminal is included in substantially the same plane,
The said connection part is a terminal block of the alternating current rotating electrical machine arrange | positioned in the position offset so that adjacent connection parts may become non-polymerization in the extending | stretching direction of the said terminal.   The said connection part is formed by inserting the terminal of the said power line in the cylindrical part formed in the said terminal, and crimping the cylindrical part so that it may become flat along the said surface. AC rotating electrical machine terminal block.   The AC rotating electrical machine is a multi-phase AC rotating electrical machine having three or more phases, and each connection portion is alternately arranged on two parallel lines perpendicular to the extending direction of each terminal along the surface. Or the terminal block of the alternating current rotating electrical machine according to claim 2.   The terminal block includes a terminal connected to a terminal of the neutral wire of the AC rotating electric machine adjacent to a terminal on one end side of the terminal row in the plane, and the terminal connected to the terminal of the neutral wire The connection part and the connection part of the terminal connected to the adjacent power line terminal are disposed at positions offset so as to be non-polymerized in the terminal extending direction. A terminal block for an AC rotating electrical machine according to claim 1. A terminal block of an AC rotating electrical machine that holds and fixes each terminal of a plurality of power lines of the AC rotating electrical machine to a plurality of terminals arranged in a row,
The plurality of terminals are arranged so that the connection part side of the terminals with the power line terminal is included in substantially the same plane,
The wire connection portion includes a terminal of the power line inserted into a cylindrical portion formed in the terminal, and the cylindrical portion is perpendicular to the surface of each terminal with respect to the surface or along a direction inclined to the same side. A terminal block for an AC rotating electrical machine that is formed by caulking so as to be flat.   The terminal block includes a terminal connected to a terminal of a neutral wire of the AC rotating electric machine, and a connection portion with the terminal of the neutral wire is disposed at a position offset from the surface. The terminal block of the AC rotating electrical machine according to any one of claims 1 to 3 and claim 5.   The terminal block of the AC rotating electrical machine according to any one of claims 1 to 6, wherein the plurality of terminals are molded and fixed to a resin base.   The AC rotating electrical machine is a terminal block of an AC rotating electrical machine according to any one of claims 1 to 7, which is mounted on a hybrid vehicle or an electric vehicle.

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