JP2015062343A - Terminal board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal board which is not damaged even when being placed under vibrations and prevents water from intruding thereinto even if a vehicle goes under the water.SOLUTION: A terminal board includes: an inverter side connection terminal 20T; a motor side connection terminal 20M; a flexible conductive member 20H where one end is connected with the inverter side connection terminal 20T and the other end is connected with the motor side connection terminal 20M; an upper base 10U to which the inverter side connection terminal 20T is fixed, the upper base 10U being positioned at the inverter case 200 side; and a lower base 10D positioned at the motor case 100 side and storing the motor side connection terminal 20M.

Description

  The present invention relates to a suitable terminal block that is not affected by vibration in an environment in which vibration occurs when an inverter used in an automobile or the like is installed in a motor case.

In general, an electric vehicle or a hybrid electric vehicle includes an inverter and a motor between the battery and the wheel in order to drive the wheel by electric power stored in the battery.
The electric power stored in the battery is converted by an inverter such as an inverter device and supplied to the motor, the motor is rotated, and the rotation of the motor is transmitted to the wheels to drive the wheels.
Conventionally, the inverter and the motor are mounted in different places of the automobile, and the terminal of the inverter and the terminal of the motor are connected using a wire harness.
On the other hand, recently, a structure in which an inverter and a motor are integrated has been proposed for the purpose of reducing the size and cost of an electric drive system from a battery to wheels (Patent Document 1 or 2).

<Invention described in Patent Document 1 or 2>
FIG. 4 is a conceptual diagram of an invention in which an inverter and a motor described in Patent Document 1 or 2 are integrated. A power receiving box 100C is provided in a motor case 100 housing a three-phase AC motor (induction motor or synchronous motor). An inverter case that is mounted and has a three-terminal 100T for receiving three-phase AC power, while receiving DC from a DC power source mounted on the other part of the automobile and converting it to three-phase AC An output terminal 200T is attached to 200. In order to supply the three-phase alternating current power of the inverter from the output terminal 200T to the three terminals 100T of the power receiving box 100C on the motor case 100 side, a terminal block resistant to vibration targeted by the present invention is used.

<Advantages of the invention described in Patent Document 1 or 2>
After assembling the motor case 100 and the inverter case 200 separately, the inverter case 200 is installed in the vicinity of the motor case 100, and the output terminal 200T of the inverter case 200 and the three terminals 100T of the motor case 100 are connected by a terminal block. Thus, the inverter case 200 and the motor case 100 can be assembled and manufactured as separate modules, and only have to be connected by a terminal block at the time of integration, so that the manufacture is easy and the cost can be reduced.

<Disadvantages of the invention described in Patent Document 1 or 2>
However, in such a configuration, a phase difference between the inverter and the motor due to the vibration of the vehicle body during driving or the vibration of the motor itself is applied to the connector, which may cause damage to the connector. Therefore, it was necessary to develop a connector that can withstand such vibration.
And the connector of patent document 3 is disclosed as a connector which can endure such a vibration.

JP-A-5-219607 JP 2004-312853 A JP 2007-280913 A

<Configuration of terminal block described in Patent Document 3>
The terminal block described in Patent Document 3 is for connecting an inverter terminal and a motor terminal, and includes an inverter casing, an inverter terminal, a motor casing, and a motor terminal. The motor terminal is fixed to the motor casing. Whereas the inverter terminal is attached, the inverter terminal is attached to the inverter casing through a vibration absorbing member.

<Advantages of the terminal block described in Patent Document 3>
As described above, since the terminal of one device is attached to the housing via the vibration absorbing member, even if vibration due to a phase difference is applied to one device and the other device, the vibration is absorbed by the vibration absorbing member. Therefore, an adverse load such as breakage can be prevented without applying an extra load to the connector connecting portion.

<Problem of terminal block described in Patent Document 3>
However, the terminal block described in Patent Document 3 uses various metal materials such as a bus bar in order to ensure conduction performance. However, since the bus bar member and the terminal have high rigidity, there is a problem that when assembled to a portion where there is movement, the bus bar member and the terminal are deformed due to breakage or bending after a long period of use, and the sealing performance is deteriorated. .

<Object of the present invention>
The present invention has been made to solve the above problems, and is resistant to vibration generated between the motor-side connection terminal and the inverter-side terminal, and is resistant to vibration even if variations due to the assembly error between the motor and the inverter are large. An object of the present invention is to provide a terminal block with good waterproof and oilproof properties that can sufficiently exhibit a sealing effect.

In order to solve the above problems, the first invention of the present application is a terminal block interposed between a motor case housing a motor and an inverter case mounted on the motor case,
An inverter side connection terminal connected to the output terminal of the inverter case;
A motor side connection terminal connected to a power receiving terminal of the motor;
A flexible conductive member having one end connected to the inverter side connection terminal and the other end connected to the motor side connection terminal;
An upper base located on the inverter case side, to which the inverter side connection terminal is fixed;
A lower base that is located on the motor case side and that houses the motor side connection terminals;
With
When the upper base is fitted to the lower base, the flexible conductive member moderates vibration propagating from the motor case side through the motor side connection terminal.
It is characterized by that.

The second invention of the present application is the terminal block of the first invention,
A waterproof and elastic member interposed between the upper base and the lower base when the upper base is fitted to the lower base;
It is characterized by that.

The third invention of the present application is the terminal block of the first or second invention,
The lower base is formed with a long cylindrical portion in which a connection portion between the motor side connection terminal and the flexible conductive member is housed.
A gap is formed between the inner surface of the long cylindrical portion and the connection portion.
It is characterized by that.

  As described above, according to the first invention, the inverter side connection terminal and the motor side connection terminal are conventionally constituted by an integral terminal block, but the upper base that stores the inverter side connection terminal and the lower that stores the motor side connection terminal. By separating the motor-side connection terminal and the inverter-side connection terminal with a flexible conductive member, a terminal block that is resistant to vibration is obtained. According to the second invention, since the elastic member is interposed between the upper base and the lower base, the vibration on the motor side is hardly transmitted to the inverter side. In addition, since the elastic member interposed between the upper base and the lower base is made waterproof, even if the car is submerged and water enters between the motor case and the inverter case, the upper base and the lower base The waterproof elastic member can prevent water from entering the terminal block from the fitting portion.

FIG. 1 is a longitudinal sectional view of a terminal block according to the present invention. FIG. 2 is an exploded vertical sectional view of the terminal block of FIG. FIG. 3 is a perspective view of a terminal block according to the present invention. FIG. 4 is a conceptual diagram of an invention in which an inverter and a motor described in Patent Document 1 or 2 are integrated.

  The following waterproof and oil-proof properties are strong against vibration generated between the motor-side connection terminal and the inverter-side terminal, and can exhibit a sufficient sealing effect against vibration even if there is a large variation due to the assembly error between the motor and the inverter. The terminal block of the present invention with good quality will be described with reference to the drawings.

<Terminal block according to the present invention>
In FIG. 1 showing a longitudinal section of a terminal block according to the present invention and FIG. 2 showing an exploded view thereof, 100 is a motor case, and 200 is an inverter case placed on the motor case 100. Reference numeral 10 denotes a terminal block according to the present invention interposed between the motor case 100 and the inverter case 200. The terminal block 10 is a resin-molded container, and three systems of electric conductors 20 (inverter-side connection terminal 20T + braided wire 20H + motor-side connection terminal 20M) that feed AC three-phase current produced on the inverter side to the motor side. Is for housing. According to the present invention, the terminal block 10 is composed of the upper base 10U and the lower base 10D separately. The upper base 10U houses the inverter side connection terminals 20T, and the lower base 10D houses the motor side connection terminals 20M. The inverter side connection terminal 20T and the motor side connection terminal 20M are connected by a braided wire 20H.

<Electric conductor 20>
The electrical conductor 20 is connected to the inverter side connection terminal 20T, the motor side connection terminal 20M, one side connected to the inverter side connection terminal 20T, and the other side connected to the motor side connection terminal 20M by the crimping portion 20S (FIG. 2). And a braided wire 20H. One end of the braided wire 20H is connected to the inverter side connection terminal 20T in the upper base 10U in a horizontal state, and the other end is directed toward the lower base 10D. To the motor side connection terminal 20M. Each inverter side connection terminal 20T and each motor side connection terminal 20M are respectively provided with bolt through holes 20B (FIG. 3) and 20C (FIG. 2). The bolt through holes 20B are output from the inverter case 200 (FIG. 4). It is passed through the terminal 200T (FIG. 4) and fastened with a nut. Further, bolts are passed through the bolt through holes 20C and fastened to the three terminals 100T (FIG. 4) of the power receiving box 100C (FIG. 4) on the motor case 100 (FIG. 4) side. A packing 30 is attached to the motor side connection terminal 20M to prevent oil leakage from the motor.
Although the braided wire 20H is used here, the bus bar can be made flexible by providing a bent portion. Therefore, such a bus bar with a bent portion or a conductive rubber is used. It is also possible.

<Upper base 10U and lower base 10D>
On the upper base 10U side, three inverter side connection terminals 20T are arranged in a horizontally juxtaposed state via resin partitions, and a braided wire 20H is connected to each end of the inverter side connection terminal 20T. ing. Since the other end of the braided wire 20H goes from the horizontal state to the lower base 10D, the other end is in the vertical state. The three braided wires 20H in the vertical state pass through the long cylindrical portion 10E formed at the lower portion of the upper base 10U.
The lower base 10D is entirely formed of a long cylindrical portion, in which three braided wires 20H and motor side connection terminals 20M that are caulked and connected to the braided wires 20H, respectively, are juxtaposed vertically via resin partitions. Arranged in a state. The top portion 10C (FIG. 2) of the lower base 10D is fitted into a long cylindrical portion 10E formed at the lower portion of the upper base 10U via a waterproof and elastic member 60 (described later).

<Configuration of Waterproof and Elastic Member 60>
Further, according to the present invention, the waterproof and elastic member 60 is interposed between the upper base 10U and the lower base 10D. The waterproof and elastic member 60 has a long cylindrical shape with a ceiling. An opening into which the motor side connection terminal 20M and the caulking portion 20S can be inserted is formed in the ceiling, and a cross section is formed in a side surface of the long cylinder. A wave shape consisting of peaks and valleys is formed. The top portion 10C of the lower base 10D is inserted into the inner opening of the long cylindrical portion, and by inserting this into the long cylindrical portion 10E below the upper base 10U, the corrugated mountain of the waterproof and elastic member 60 is crushed, and the upper base Vibration absorption and waterproofing are ensured between 10U and the lower base 10D.

<Material of waterproof and elastic member 60>
As a material of the waterproof and elastic member 60, a rubber member having excellent oil resistance can be used. Specifically, for example, acrylic rubber can be used.

<Effect of waterproof and elastic member 60>
Even if the lower base 10D moves in the direction of the arrow in the figure (FIG. 1) due to vibration on the motor side, the use of such a waterproof and elastic member 60 here allows the elastic member of the waterproof and elastic member 60 to absorb the vibration. In addition, vibration is hardly transmitted to the inverter side of the separate upper base 10U.
In addition, since the upper base 10U and the lower base 10D are connected not by the conventional bus bar but by the flexible braided wire 20H, vibration is further hardly transmitted to the inverter side.
In addition, since the waterproof and elastic member 60 provided at the place where the upper base 10U and the lower base 10D are separated and fitted is provided with a waterproof function, the motor case 100 and the inverter are temporarily submerged in water. Even if water enters between the case 200 and the waterproof and elastic member 60, water can be prevented from entering the terminal block 10 from the fitting portion between the upper base 10U and the lower base 10D.

<Other Examples>
Further, a waterproof rubber plug 40 is interposed between the lower base 10D and the motor case 100, and a waterproof rubber plug 50 is interposed between the upper base 10U and the inverter case 200. By doing in this way, the possibility that water may enter the terminal block 10 can be further prevented.

<Advantages of the present invention>
Conventionally, the inverter side connection terminal and the motor side connection terminal are configured as an integrated terminal block, but according to the present invention, the inverter base connection terminal and the motor base connection terminal are separated into an upper base for storing the inverter side connection terminal and a motor base connection terminal. In addition, since an elastic member is interposed between the upper base and the lower base, vibration on the motor side is hardly transmitted to the inverter side.
In addition, a terminal block that is resistant to vibration is obtained by connecting the motor side connection terminal and the inverter side connection terminal with a braided wire. In addition, since the elastic member interposed between the upper base and the lower base is waterproof, even if the car is submerged and water enters between the motor case and the inverter case, the upper base and the lower base The waterproof elastic member can prevent water from entering the terminal block from the fitting portion.

10 Terminal block 10U Upper base 10E Long cylindrical part 10D Lower base 10C Lower base 20 Electrical conductor 20M Motor side connection terminal 20H Braided wire 20S Caulking part 20T Inverter side connection terminal 20B, 20C Bolt through hole 30 Packing 40 Waterproof rubber Plug 50 Waterproof rubber plug 60 Waterproof and elastic member 100 Motor case 100C Power receiving box 100T 3 terminal 200 Inverter case 200T Inverter output terminal

Claims (3)

A terminal block interposed between a motor case housing a motor and an inverter case placed on the motor case,
An inverter side connection terminal connected to the output terminal of the inverter case;
A motor side connection terminal connected to a power receiving terminal of the motor;
A flexible conductive member having one end connected to the inverter side connection terminal and the other end connected to the motor side connection terminal;
An upper base located on the inverter case side, to which the inverter side connection terminal is fixed;
A lower base that is located on the motor case side and that houses the motor side connection terminals;
With
When the upper base is fitted to the lower base, the flexible conductive member moderates vibration propagating from the motor case side through the motor side connection terminal.
A terminal block characterized by that. A waterproof and elastic member interposed between the upper base and the lower base when the upper base is fitted to the lower base;
The terminal block according to claim 1. The lower base is formed with a long cylindrical portion in which a connection portion between the motor side connection terminal and the flexible conductive member is housed.
A gap is formed between the inner surface of the long cylindrical portion and the connection portion.
The terminal block according to claim 2.

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