JP2010206890A - Bus-bar - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bus-bar that prevents stress from being concentrated at each fixing part with a terminal block of the bus-bar even when an external force is applied to the bus-bar. <P>SOLUTION: In a first bus-bar 14A, twisted parts 141, 142 are provided in a stretched part 14b. Therefore, the flexible direction can be different between two regions (14X, 14Y) across the twisted part 141 in the stretched part. The flexible direction can be different between the two regions (14X, 14Y) across the twisted part 142 in the stretched part. As a result, the region 14X is more flexible in X direction, while the region 14Y is more flexible in Y direction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a structure of a bus bar used for supplying power to components, devices, and the like.

  As an example for disclosing the structure of the bus bar, there is a bus bar employed in the motor generator disclosed in Patent Document 1 below. One end of the bus bar is fixed to a terminal block for ensuring insulation, and a joint portion with an external terminal is provided at the other end. Further, the bus bar itself usually has a flat plate shape and is appropriately bent for positioning the joint.

JP 2008-259365 A

  When fixing external terminals to the bus bar joints, or when the vibration of a vehicle equipped with a motor generator is applied to the bus bar, the bus bar swings to fix the bus bar to the terminal block (base part of the bus bar) There is a concern that stress will concentrate on the surface.

  Specifically, the bus bar itself has a plate-like form, and its cross-sectional shape has a short side and a long side. Further, the bus bar is bent so that the bending line extends along the long side. This is because it is easier to bend along the long side.

  As a result, when an external force is applied in the bending direction, the bus bar situation easily bends to absorb the external force and the stress does not concentrate on the fixing portion of the bus bar with the terminal block. However, when an external force is applied in a direction that intersects the bending direction, the bus bar itself does not bend, so the external force is directly applied to the fixed portion of the bus bar with the terminal block, and is applied to the fixed portion of the bus bar with the terminal block. Stress will be concentrated.

  An object of the present invention is to provide a bus bar having a structure in which stress is not concentrated on a fixing portion of the bus bar with a terminal block even when an external force is applied to the bus bar.

  In the bus bar based on this invention, it is a bus bar held by a terminal block for ensuring insulation, and extends in a direction bent with respect to the plate-like joint portion to which the external terminal is connected and the joint portion. A plate-like elongated portion; and a fixing portion that is bent with respect to the elongated portion, is disposed substantially parallel to the joint portion, and is held by the terminal block. In a state where the portion is fixed to the terminal block, a twisted portion is generated by twisting the stretched portion around the central axis extending in the stretching direction as the rotation center.

  According to the bus bar based on the present invention, even when an external force is applied to the bus bar, the extended portion is provided with the twisted portion, so that the two extended portions sandwiching the twisted portion are provided. The direction of the ease of bending can be varied in the region. As a result, the bus bar itself can be deflected by external forces from different directions in the two elongated portions sandwiching the twisted portion. As a result, it is possible to avoid stress concentration at the fixed portion of the bus bar with the terminal block.

It is a top view which shows the stator of the motor by which the bus-bar in embodiment was employ | adopted. It is a figure which shows the whole structure of the bus-bar in embodiment. It is a figure which shows the form of one bus bar in embodiment. It is a figure which shows the form of the other bus bar in embodiment. It is a figure which shows the form of the bus-bar in other embodiment.

  A bus bar according to an embodiment of the present invention will be described below with reference to the drawings. Note that in the embodiments described below, when referring to the number, amount, and the like, the scope of the present invention is not necessarily limited to the number, amount, and the like unless otherwise specified. The same parts and corresponding parts are denoted by the same reference numerals, and redundant description may not be repeated.

  First, referring to FIG. 1, an outline of a stator of a motor generator that employs a bus bar in the embodiment will be described. The stator 100 includes an annular stator core 200 and a ring 300 disposed on the outer peripheral side of the stator core 200. The stator core 200 is composed of a plurality of divided stator cores 250 arranged in an annular shape. A coil is attached to the divided stator core 250. A terminal block 1 </ b> A that holds the bus bar is attached to the outer peripheral surface of the ring 300.

  Referring to FIG. 2, this terminal block 1 </ b> A includes a base portion 10 and a first arm portion 11, a second arm portion 12, and a third arm portion 13 that extend outward from the base portion 10, and each has a predetermined gap. Are provided apart from each other. The first arm portion 11 holds the first bus bar 14A, the second arm portion 12 holds the second bus bar 15A, and the third arm portion 13 holds the third bus bar 16A.

  The structure of the first bus bar 14A will be described in detail with reference to FIG. The first bus bar 14A bends in a direction where the first bus bar 14A rises with respect to a plane including the plate-like joint portion 14a formed with a through-hole and used for connection to the external terminal, and in the direction of the bend. A plate-like elongated portion 14b that extends, and a fixing portion 14c that is bent with respect to the elongated portion 14b and that is disposed substantially in parallel with a plane including the joint portion 14a are provided. The fixing portion 14 c is held by the first arm portion 11.

  A conductive metal material is used for the first bus bar 14A, and an insulating material such as a resin is used for the terminal block 1A in order to ensure insulation from other adjacent bus bars. The first bus bar 14A itself has a rectangular cross-sectional shape, the long side direction is located along the Y direction in the figure, and the short side direction is located along the X direction orthogonal to the Y direction. ing.

  The stretched portion 14b of the first bus bar 14A has a stretched portion around the central axis D1 extending in the stretching direction of the stretched portion 14b in a state where the positions of the joint portion 14a and the fixing portion 14c are fixed. A first twisted portion 141 and a second twisted portion 142 that are generated by twisting 14 b by about 90 degrees (R direction) are provided. The twisted direction (R direction) of the elongated portion 14b may be twisted about 90 degrees in the twist direction opposite to that shown in the figure.

  Next, the structure of the second bus bar 15A will be described in detail with reference to FIG. Similarly to the first bus bar 14A, the second bus bar 15A also rises with respect to a plane including the plate-like joint portion 15a formed with a through-hole and used for connection to an external terminal. A plate-like extended portion 15b that bends in the direction and extends in the bent direction, and a fixing portion 15c that is bent with respect to the extended portion 15b and arranged substantially in parallel with the plane including the joint portion 15a. ing. The fixing portion 15 c is held by the second arm portion 12.

  The second bus bar 15A is made of a conductive metal material, and the terminal block 1A is made of an insulating material such as resin in order to ensure insulation from other adjacent bus bars. Yes. The second bus bar 15A itself also has a rectangular cross section, the long side direction is located along the Y direction in the figure, and the short side direction is located along the X direction orthogonal to the Y direction. .

  Further, the extending portion 15b of the second bus bar 15A also extends around the central axis D1 extending in the extending direction of the extending portion 15b with the position of the joint portion 15a and the fixing portion 15c fixed. A first twisted portion 151 and a second twisted portion 152 that are generated by twisting the shape portion 14b by about 90 degrees (R direction) are provided. The twisted direction (R direction) of the elongated portion 15b may be twisted about 90 degrees in the twist direction opposite to that shown in the figure.

  As described above, in the first bus bar 14A according to the present embodiment, when the external terminal is fixed to the joint portion 14a, or when the vibration of the vehicle is applied to the first bus bar 14A, the first bus bar 14A swings. become. As a result, an external force is applied to the first bus bar 14A, but the extended portions 14b are provided with the torsion portions 141 and 142, so that two regions of the extended portion sandwiching the torsion portion 141 are provided. (14X, 14Y) The direction of the ease of bending can be varied. In addition, the direction of the bendability can be varied also in the two regions (14X, 14Y) of the stretched portion sandwiching the twisted portion 142. In FIG. 3, the region 14X is easily bent in the X direction, and the region 14Y is easily bent in the Y direction.

  As a result, the extended portion 14b can be bent by the first bus bar 14A itself against external forces from different directions. As a result, it is possible to avoid stress concentration at the fixed portion of the first bus bar 14A and the base portion 10 of the terminal block 1A. The same applies to the second bus bar 15A.

  Note that, in the first bus bar 14A and the second bus bar 15A, in order to maintain the ease of connection with the external terminals, the joint 15a and the fixed part are not changed so as not to change the positions of the joints 14a and 15a. In a state where the position with respect to 15c is fixed, a configuration is adopted in which the elongated portions 14b and 15b are twisted about 90 degrees around the center axis D1 extending in the extending direction.

  However, even if the positions of the joint portions 14a and 15a are changed, if there is no problem in the ease of connection with the external terminal, only the fixing portion 14c is connected to the terminal block 10 as in the first bus bar 14B shown in FIG. In a state of being fixed to the base portion 10, a configuration in which the elongated portion 14b and the joint portion 14a are twisted by about 90 degrees around the central axis D1 extending in the extending direction may be employed. In this case, the torsion part 141 becomes one place. Further, the twisted direction (R direction) of the elongated portion 15b may be twisted about 90 degrees in the twist direction opposite to that shown in the figure.

  In the above-described embodiment, the case where the rotation angle around the central axis D1 extending in the stretching direction is 90 degrees is described. However, the twist angle is not limited to 90 degrees. The torsion angle is appropriately selected according to the direction in which the external force is applied. Further, when two twisted portions are provided as shown in FIGS. 3 and 4, the two twisted angles can be provided not only at the same angle but also at different angles.

  In the above embodiment, the case where the present invention is applied to a bus bar employed in a stator in a motor generator mounted on a vehicle has been described. However, the present invention is not limited to a motor generator, and includes an inverter, a battery, and other electric power. The present invention can be applied to all bus bars used for supply.

  Although the embodiments of the present invention have been described above, the embodiments disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  1A terminal block, 10 base portion, 11 first arm portion, 12 second arm portion, 13 third arm portion, 14A, 14B first bus bar, 14X, 14Y region, 14a, 15a joint portion, 14b, 15b extended portion , 14c, 15c fixed part, 15A second bus bar, 15X, 15Y region, 16A third bus bar, 100 stator, 200 stator core, 250 split stator core, 300 ring.

Claims (2)

A bus bar fixed to a terminal block for ensuring insulation,
A plate-like joint to which the external terminal is connected;
A plate-like elongated portion extending in the direction of bending with respect to the joint portion;
A bending portion that is bent with respect to the elongated portion, is disposed substantially in parallel with the joint portion, and is held by the terminal block.
The elongated portion has a twisted portion generated by twisting the elongated portion around the central axis extending in the extending direction in a state where the fixed portion is fixed to the terminal block. The bus bar.   In the stretched portion, the first twist generated by twisting the stretched portion around a central axis extending in the stretching direction in a state where the joint portion and the fixing portion are fixed. Part) and a 2nd twist part, The bus-bar of Claim 1.

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