KR20190117924A - Motor Having Busbar Connector Integral Structure - Google Patents

Abstract

The present invention relates to a motor having a busbar connector integral structure in which a terminal is integrally formed with a busbar so as to reduce the number of components and the number of assembling processes. According to the present invention, the motor having a busbar connector integral structure comprises: a rotor installed to be rotatable; a stator having a plurality of coils wound thereon; busbars of a U phase, a V phase, and a W phase individually having a terminal connected to the outside, a plurality of coil contact units, and a connection unit connecting the coil contact units; a busbar housing having a busbar accommodation unit accommodating the connection units of the busbars and an interface connection unit formed to protrude from one side of the busbar accommodation unit and accommodated while at least a part of the terminals of the busbars penetrates from one side to the other side; and a motor housing having the busbar housing installed therein and having an interface through hole passing through the interface connection unit to expose the interface connection unit to the outside.

Description

Motor having busbar connector integrated structure {Motor Having Busbar Connector Integral Structure}

The present invention relates to a motor having a bus bar connector integrated structure.

Typical three-phase powered motors include a stator and a busbar.

The busbar is a terminal unit of the drive motor and is a component that electrically connects the power supply and the stator.

Generally, a motor includes a stator having a tooth and a coil wound on the tooth, a rotating rotor, and a bus bar for applying supplied power to the stator coil.

In the case of a three-phase motor, the motor coils are supplied with a phase difference of 120 degrees each, and the other three phases U, V, and W are supplied with power.

The stator coil is connected to one of the U-phase, V-phase, and W-phase power on one side, and is connected to the neutral point on the other side.

Conventionally, an interface to which a bus bar and an external power source are connected is configured separately. That is, the conventional motor has a structure in which a bus bar connecting a stator coil and a connector for connecting an external power source are separated into separate pieces. Therefore, the busbar and the connector had to be electrically connected separately after the busbar was electrically connected to the stator coil, which was not only cumbersome due to the narrow connection space, but also required a long time, which reduced productivity. do. In addition, there was a need to manage busbars and connectors as separate components.

An object of the present invention is to provide a motor having a bus bar connector integrated structure of a new structure.

A motor having a bus bar connector integrated structure according to the present invention for achieving the above object includes a rotor, stator, U-phase, V-phase, W-phase busbars, busbar housing and motor housing.

The rotor is rotatably installed.

The stator is wound with a plurality of coils.

Each of the U-phase, V-phase, and W-phase busbars may have a terminal that is connected to the outside, and a connection that connects the plurality of coil contacts and the coil contacts. The terminal is bent at the end of the busbar and formed integrally.

The busbar housing has a busbar accommodating portion for accommodating the connection parts of the busbars, and an interface connection part protruding from one side of the busbar accommodating portion and the terminals of the busbars penetrating from one side to the other side and at least partially exposed to the outside. .

The busbar receiving portion has a ring shape, and the busbar may be inserted into the busbar receiving portion by interference fit.

The interface connection portion may protrude vertically upward from one side of the bus bar accommodating portion, and may have a hexahedron shape of which one surface is open. And the electrode of the external power source can be electrically connected through the open one side of the hexahedral shape.

In addition, a plurality of female screws made of metal may be installed at the interface connection portion of the busbar housing. And the female screw may be integrally formed by insert injection into the busbar housing. When the busbar is coupled to the busbar housing and assembled, the terminals are positioned and exposed in front of the female screws in the interface connection. Electrical connection is achieved by fastening the screw to the female screw while passing the screw through the screw holes of the terminal and the electrode with each electrode of the external power source disposed over the respective terminals.

Meanwhile, the motor housing may have a bus bar housing installed therein and an interface through hole so that the interface connecting portion penetrates and is exposed to the outside. In this way, the busbar housing is received and located within the motor housing except for the interface connection.

According to the motor having a bus bar connector integrated structure made of the above-described structure, the terminal is formed integrally with the bus bar can achieve the effect that the number of parts and the number of assembly processes can be reduced.

In addition, since the interface connecting portion, which is a terminal housing portion that protects the terminal, is integrally formed with the busbar housing and protrudes out of the motor housing and is exposed, a robust structure for protecting the terminal against external force can be obtained.

1 is a view showing a state in which the bus bar is separated from the bus bar housing of the present invention.
Figure 2 is a view showing a view of the bus bar housing of the present invention from below.
3 is a view showing a bus bar of the present invention.
4 is a view illustrating a state in which the interface connecting portion of the present invention protrudes out of the motor housing.
5 is an exploded view of a motor having a bus bar connector integrated structure.

Hereinafter, a motor 100 having a bus bar connector integrated structure according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

The motor 100 having a bus bar connector integrated structure according to the present invention includes a rotor 110, a stator 140, a U-phase bus bar 180, a V-phase bus bar 190, a W-phase bus bar 200, And a busbar housing 250 and a motor 100 housing.

The rotor 110 is rotatably installed. In the present invention, the motor 100 is an axial type, and the rotor 110 has a magnet 120 arranged in a circumferential direction on a bottom surface of the rotor 130 having a disk shape.

A plurality of coils 150 are wound around the stator 140. The stator 140 includes a stator frame 160 and a bobbin 170. The bobbin 170 is an electrically insulating material, and serves to prevent the coil 150 and the stator frame 160 from directly contacting each other. A plurality of coils 150 are wound around the bobbin 170 and coupled to the stator frame 160 in the circumferential direction.

The U-phase bus bar 180, the V-phase bus bar 190, and the W-phase bus bar 200 each have a terminal 240 connected to the outside and a connection portion connecting a plurality of coil contacts and coil contacts. Have it integrally.

The terminal 240 is bent at the ends of each of the U-phase bus bar 180, the V-phase bus bar 190, and the W-phase bus bar 200 to be integrally formed.

The connecting portion is formed in a curved state to be inserted into the bus bar housing 250 to be described later.

The U-phase bus bar 180, the V-phase bus bar 190, and the W-phase bus bar 200 are bent upward once based on the terminal 240 and bent once again in the opposite direction, and then the terminal 240 The connecting portion connected to the end of the b) is formed by bending the curve.

The outer circumferential surface of the connection portion is formed with coil contact portions that are bent upwards and spaced apart at regular intervals.

The busbar housing 250 includes a busbar receiver 260 and an interface connector 270.

The bus bar accommodating part 260 accommodates the connection parts of the bus bars, and the interface connecting part 270 protrudes from one side of the bus bar accommodating part 260, and the U phase bus bar 180 and the V phase bus bar 190 are formed. The terminals 240 of the W-phase busbar 200 penetrate from one side to the other side (from the bottom to the top of the drawing) to be accommodated while at least partially exposed to the outside.

The bus bar accommodating part 260 has a ring shape, and the U-phase bus bar 180, the V-phase bus bar 190, and the W-phase bus bar 200 are inserted into the bus bar accommodating part 260 by interference fit. Can be. According to an embodiment, the U-phase bus bar 180, the V-phase bus bar 190, and the W-phase bus bar 200 may be integrally formed by the bus bar housing 250 and the insert injection.

In addition, the bus bar housing 250 may have a contact portion groove 280 formed on the outer circumferential surface such that the coil contact portion may be exposed to the radially outer side. The contact portion groove 280 may have a shape in which the U-phase bus bar 180, the V-phase bus bar 190, and the W-phase bus bar 200 are opened downward to be installed from the bottom to the top.

The interface connector 270 may protrude vertically upward from one side of the bus bar accommodating part 260, and may have a hexahedron shape of which one surface is open. In more detail, the interface connector 270 may be located on an upper surface of the bus bar receiver 260. The interface connector 270 is provided with a terminal insertion part 350 so that the terminal 240 is inserted into and coupled to the upper part of the bus bar housing 250.

In addition, the bus bar housing 250 may include a plurality of female screws 290 installed at the interface connector 270. The female screw 290 is positioned in the female screw receiving groove 300, and may be integrally formed by insert injection into the bus bar housing 250. As shown in the drawings, the female screw receiving groove 300 may be arranged in three lines, and the groove may be formed by piping or penetrating in the horizontal direction. In some embodiments, the female screw 290 may be press-fitted into the female screw receiving groove 300 by a knurling process.

The motor 100 housing includes a first motor housing 310 and a second motor housing 320. The bus motor housing 250 is installed in the first motor housing 310, and the interface connection part 270 penetrates. And has an interface through hole 330 to be exposed to the outside. In the present embodiment, the interface through hole 330 protrudes in the axial direction of the motor 100 as shown in the drawing. However, the interface through hole 330 may be exposed through the outer circumferential surface of the first motor housing 310. The second motor housing 320 may be coupled to the first motor housing 310. The first motor housing 310 and the second motor housing 320 may be formed with a plurality of screw holes 340 formed in the axial direction to be screwed to each other on the outer circumferential surface.

100: motor
110: rotor
120: magnet
130: rotor
140: stator
150: coil
160: stator frame
170: bobbin
180: U-phase busbar
190: V phase busbar
200: W phase busbar
220: coil contact portion
230: connection
240: terminal
250: busbar housing
260: busbar receiver
270 interface connection
280: contact groove
290: tapping screw
300: tapping screw receiving groove
310: first motor housing
320: second motor housing
330: interface through hole
340: screw hole
350: terminal insert

Claims (6)

A rotor rotatably installed;
A stator wound with a plurality of coils;
U-phase, V-phase, and W-phase busbars each having a terminal connected to the outside, a plurality of coil contact portions, and a connection portion connecting the coil contact portions, respectively;
A bus bar accommodating part accommodating the connection parts of the bus bars and an interface connection part protruding from one side of the bus bar accommodating part, and the terminals of the bus bars penetrate from one side to the other side to be at least partially exposed to the outside A busbar housing;
A motor housing having the bus bar housing installed therein and having an interface through hole so that the interface connection portion is exposed to the outside;
The motor having a bus bar connector integrated structure comprising a. The method of claim 1,
The terminal has a bus bar connector integrated structure, characterized in that the terminal is bent at the end of the bus bar formed integrally. The method of claim 1,
The interface connecting portion has a bus bar connector-integrated structure, characterized in that the vertically projecting upward from one side of the bus bar receiving portion, the one side is an open hexahedral shape. The method of claim 1,
The bus bar housing has a bus bar connector integrated structure, characterized in that it comprises a plurality of tapping screws installed in the interface connection. The method of claim 4, wherein
The tapping screw is a motor having a bus bar connector integrated structure, characterized in that the insert is injected into the bus bar housing. The method of claim 1,
The bus bar accommodating part has a ring shape, and the bus bar has a bus bar connector integrated structure, wherein the bus bar accommodating part is inserted into the bus bar accommodating part.

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