JP2021009781A - Bus bar - Google Patents

Abstract

To provide a technique capable of suppressing interference between a flexible conductor portion and a peripheral component in a bus bar.SOLUTION: A bus bar 30 according to an embodiment of the present invention includes, for example, a stator terminal 15 of a motor 10, terminal portions 31 and 32 provided at both ends, which are electrically connected to a terminal block 20 of a power supply circuit (for example, a power conversion device such as an inverter), a flexible conductor (main body 33) that connects between the terminal portions 31 and 32, and a core material 34 that is attached to the main body 33, and extends in the direction connecting both ends of the main body 33.SELECTED DRAWING: Figure 2

Description

The present invention relates to a bus bar.

For example, there is known a bus bar in which flat terminals are joined to both ends of a flexible conductor (for example, a braided wire) (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2008-41330

However, if the flexible conductor portion is deformed, interference between the bus bar and peripheral parts may occur.

Therefore, in view of the above problems, it is an object of the present invention to provide a technique capable of suppressing interference between a flexible conductor portion in a bus bar and peripheral parts.

In order to achieve the above object, in one embodiment of the present invention,
Terminals provided on each end and
A flexible conductor that connects between the terminals and
A core material attached to the conductor and extending in a direction connecting both ends of the conductor is provided.
Busbars are provided.

According to the present embodiment, the bus bar can easily maintain the shape of the conductor by the action of the core material attached to the flexible conductor. Therefore, the bus bar can suppress the interference between the flexible conductor portion and the peripheral component.

According to the above-described embodiment, it is possible to provide a technique capable of suppressing interference between the flexible conductor portion of the bus bar and peripheral parts.

It is a figure explaining the outline of the bus bar which concerns on this embodiment. It is a perspective view which shows an example of the structure of the bus bar which concerns on this embodiment.

Hereinafter, modes for carrying out the invention will be described with reference to the drawings.

[Overview of Busbar]
First, the outline of the bus bar 30 according to the present embodiment will be described with reference to FIG.

FIG. 1 is a diagram illustrating an outline of the bus bar 30. Specifically, it is a figure which shows the outline of the mounting state of the bus bar 30.

In FIG. 1, only the outer peripheral portion where the stator (stator core 11 and stator coil 12) of the electric motor 10 is arranged is drawn, and the portion on the inner peripheral side of the outer peripheral portion of the electric motor 10 (for example, a rotor, a rotating shaft, etc.) Is omitted. Further, in FIG. 1, the drawing of the housing (also referred to as “case” or “housing”) of the electric motor 10 is omitted.

The bus bar 30 is used to electrically connect the electric motor 10 and a power supply circuit (for example, a power conversion device such as an inverter) that supplies electric power to the electric motor 10.

The electric motor 10 is, for example, a driving force source for the vehicle and is mounted on the front portion of the vehicle.

The electric motor 10 includes a stator core 11, a stator coil 12, a leader wire 13, a power line 14, and a stator terminal 15.

The stator core 11 is a magnetic material and is arranged in an annular shape on the outer peripheral portion of the electric motor 10.

The stator coil 12 is wound in a space (slot) between a plurality of teeth arranged at substantially equal intervals in the circumferential direction on the inner peripheral side of the stator core 11.

The leader wire 13 is pulled out from the stator coil 12, and its tip is joined to the power wire 14 by welding, press fitting into a hollow copper wire, or the like.

The power line 14 electrically connects the stator terminal 15 and the leader line 13. The power line 14 is attached to the stator terminal 15 by bolting or the like.

The stator terminal 15 is attached to the housing of the electric motor 10. The stator terminal 15 is connected to the terminal of the bus bar 30 and receives electric power for driving the electric motor 10 via the bus bar 30.

One end of the bus bar 30 is attached to the terminal block 20 of the power supply circuit, and the other end is attached to the stator terminal 15 of the electric motor 10. As a result, the bus bar 30 can supply drive power to the electric motor 10 (stator coil 12) from the power supply circuit.

[Detailed configuration of busbar]
Next, the detailed configuration of the bus bar 30 will be described with reference to FIG.

FIG. 2 is a perspective view showing an example of the configuration of the bus bar 30 according to the present embodiment.

As shown in FIG. 2, the bus bar 30 includes terminal portions 31, 32, a main body portion 33, a core material 34, joint portions 35, 36, and a protective portion 37.

In the drawing, the terminal hole of the terminal portion 32 is hidden by the self-lock nut 32a.

The terminal portion 31 is provided at one end of the bus bar 30 and is attached to the terminal block 20. The terminal portion 31 is made of a flat conductor (for example, aluminum or copper). The terminal portion 31 is provided with a terminal hole 31a at the tip through which a bolt for fastening to the terminal block 20 is inserted. The terminal portion 31 is provided with a predetermined angle formed by bending or the like between the tip portion provided with the terminal hole 31a and the extending portion extending from the tip portion. Thereby, for example, the bus bar 30 can be arranged between the terminal block 20 and the stator terminal 15 in a path that can avoid interference with surrounding parts even in a very narrow space.

The terminal portion 32 is provided at the other end of the bus bar 30 and is attached to the stator terminal 15. The terminal portion 32 is arranged coaxially with the terminal hole at the tip, and a self-locking nut 32a into which a fastening bolt to the stator terminal 15 is screwed is attached. The terminal portion 32 is provided with a predetermined angle formed by bending or the like between the tip portion where the self-locking nut 32a is provided and the extending portion extending from the tip portion. Thereby, for example, the bus bar 30 can be arranged between the stator terminal 15 and the terminal block 20 in a path that can avoid interference with surrounding parts even in a very narrow space.

The main body 33 (an example of a conductor) electrically connects between the terminals 31 and 32. The main body 33 is composed of a flexible conductor (for example, an aggregate of very thin copper wires such as a braided wire or a bundle of electric wires). As a result, the bus bar 30 can absorb the vibration transmitted from the electric motor 10 and the power supply circuit by the flexible action of the main body 33, and can absorb the variation at the time of assembly.

The core material 34 extends between both ends of the main body 33, that is, in a direction extending between the joints 35 and 36 (for example, in a form of connecting between the joints 35 and 36). Attached to. The core material 34 is, for example, a copper wire that is relatively thicker than the copper wire contained in the braided wire or the electric wire bundle that constitutes the main body 33, and is inside the aggregate of the copper wire such as the braided wire or the electric wire bundle. Intervene. This makes it easier for the bus bar 30 to maintain the shape of the main body 33 having flexibility (flexibility).

The core material 34 may be attached to a part of the section between the joint portions 35 and 36 as long as it can maintain the shape of the main body portion 33 and avoid interference with peripheral parts. Further, if the core material 34 can maintain the shape of the main body 33 and avoid interference with peripheral parts, the core material 34 is not on the main body 33, that is, on the surface of the copper wire aggregate, but on the surface or the like. It may be attached.

The joint portion 35 is a joint portion between the terminal portion 31 and the main body portion 33. Similarly, the joint portion 36 is a joint portion between the terminal portion 32 and the main body portion 33. The joints 35 and 36 are realized by known joining methods such as welding, welding, and crimping.

The protective portion 37 is provided around the main body portion 33 so as to include the main body portion 33. Thereby, for example, the bus bar 30 can be protected so that the main body 33 does not directly interfere with peripheral parts existing at a very close position. Further, the protective portion 37 may have an insulating property. As a result, the protective portion 37 can prevent a short circuit between the conductive peripheral component and the main body portion 33. The protective portion 37 may be, for example, rubber, fluororesin, epoxy resin, electrodeposition coating, insulating tube, or the like.

[Action of the present embodiment]
Next, the operation of the bus bar 30 according to the present embodiment will be described.

In the present embodiment, the bus bar 30 is connected between the terminal portions 31 and 32 provided at both ends and the terminal portions 31 and 32, and is attached to the main body portion 33 and the main body portion 33 of the flexible conductor. A core material 34 extending in a direction connecting both ends of the main body 33 is provided.

As a result, the bus bar 30 can easily maintain the shape of the conductor (main body 33) by the action of the core material 34 attached to the flexible conductor (main body 33). Therefore, the bus bar 30 can suppress interference between the flexible conductor portion (main body portion 33) and peripheral parts.

Although the embodiments for carrying out the present invention have been described in detail above, the present invention is not limited to such specific embodiments, and various aspects are within the scope of the gist of the present invention described in the claims. Can be transformed and improved.

10 Electric motor 15 Stator terminal 20 Terminal block 30 Bus bar 31 Terminal part 31a Terminal hole 32 Terminal part 32a Self-lock nut 33 Main body (conductor)
34 Core material 35, 36 Joint 37 Protective part

Claims (1)

Terminals provided on each end and
A flexible conductor that connects between the terminals and
A core material attached to the conductor and extending in a direction connecting both ends of the conductor is provided.
Bus bar.

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