JP2008301544A - Terminal block for rotary electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact terminal block for rotary electric machine, to be provided on a vehicle and keeping airtightness in a case housing the rotary electric machine. <P>SOLUTION: The terminal block 50 for rotary electric machine has a composite connector 10 having a power connector and a signal connector both covered with a shielding shell 12, a plate 14 and screws 47 for fixing the composite connector to a generator unit 200. In the terminal block 50 for rotary electric machine, a bus cable 41 is connected with a bus cable connector 43. The bus cable connector 43 is fixed on the generator unit 200 with a cable stay 42 and screws 45 for the cable stay, and similarly, the shielding shell 12 and the bus cable connector 43 are fixed on the generator unit 200 with screws 12 for the shielding shell. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a terminal block for a rotating electrical machine provided with a hermeticity in a case in which a vehicle generator or electric motor (hereinafter referred to as a rotating electrical machine) is built.

  In recent years, hybrid vehicles, electric vehicles, fuel cell vehicles, and the like have attracted attention as vehicles that are environmentally friendly due to regulations on the emission of greenhouse gases.

  In addition to conventional engines, hybrid vehicles are equipped with devices such as a battery as a drive power source, an electric motor driven by an inverter, and a generator that charges the battery by the engine. For this reason, the structure is more complicated than that of a conventional automobile, and the devices need to be stored in a limited mounting space, so that each device is downsized.

  For example, in a hybrid vehicle, in an electric system device, the battery, the inverter, and the connection cable are downsized to improve the mountability. In drive system equipment, an electric motor, generator, power distribution mechanism and speed change mechanism are integrated into the case, and a sealed space is provided to prevent the ingress of dust and rainwater from the outside. Therefore, a cooling means is provided by gear oil and cooling water, and a pressure adjusting means for preventing an increase in pressure inside the case due to heat generation is provided.

  In addition, in order to improve the power performance of the vehicle, a voltage of 500 volts or more is used, for example, by an inverter for a vehicular generator or electric motor (hereinafter referred to as a rotating electric machine), and the high-voltage unit is oil-cooled. There is a need for measures to prevent short circuits and reduce noise. The three-phase power line connected to the inverter is connected to the terminal block with a predetermined creepage distance, and the terminal block is electromagnetically shielded.

  Electrical equipment such as a rotating electrical machine and an inverter are connected by a conductive cable having a connector. A connector to be connected to a rotating electrical machine or the like is securely fixed to the case in order to withstand large vibrations from the rotating electrical machine and the cable, and the cable at the connector connection portion is also shielded against electromagnetic waves.

  A general power connector mounting method is to provide a sealing material to ensure airtightness, insert a plastic power connector into the hole for the three-phase terminal provided in the case, and then fix it from the outside of the case. ing. Thereafter, the rotating electrical machine is mounted inside the case, and the terminals of the rotating electrical machine are connected to the power connector inside the case. In addition, since the hole for three-phase terminals is arrange | positioned ensuring the creeping distance between terminals, the width | variety of a terminal part is large compared with the cable width.

  Patent Document 1 discloses a technique for securing an electromagnetic wave shielding property while fixing a cable connected to a rotating electrical machine using a clamp that absorbs vibration from the cable. Further, in Patent Document 2, in order to secure a mounting space, a terminal box that accommodates a terminal drawn from the rotating electrical machine is provided in the case, and a respiratory path provided in the case, a respiratory path provided in the terminal box, , A technique relating to a hybrid vehicle in which pressure regulating means is incorporated and equipment mounting property is secured is disclosed.

JP 2005-235443 A Japanese Patent Laying-Open No. 2004-122979 (FIG. 9)

  In addition to the three-phase power lines described above, the rotating electrical machine is provided with, for example, a resolver for detecting the rotation angle, a temperature sensor for detecting the temperature of the rotating electrical machine, etc., and these signals are provided in the case. It is connected to the outside by a connector. For this reason, it is difficult to reduce the size of the terminal block by securing the installation space for a plurality of connectors, mounting an airtight seal or an electromagnetic shielding component, etc., and further increasing the number of components attached to the case.

  In order to solve such a problem, the present invention provides a terminal block for a rotating electrical machine that can be reduced in size and reduced in electromagnetic noise, and is provided with a hermeticity in a case incorporating the rotating electrical machine. Objective.

  In order to achieve the above object, a terminal block for a rotating electrical machine according to the present invention is a terminal block for a rotating electrical machine provided in a case incorporating a vehicle generator or motor (hereinafter referred to as a rotating electrical machine). A composite connector in which a power connector that relays a plurality of power cables for guiding the power of the rotating electrical machine, and a signal connector that relays a sensor signal for detecting the rotation angle of the rotating electrical machine, A seal member provided in the composite connector for sealing the opening, and a holding member that presses and holds the composite connector against the case.

  Further, in the terminal block for a rotating electrical machine according to the present invention, the composite connector has an arrangement distance between each connection terminal provided on the power connector inside the case in order to secure a creepage distance. It is characterized by being larger than the arrangement interval between the connection terminals.

  Moreover, in the terminal block for a rotating electrical machine according to the present invention, the composite connector further includes a pressure valve for adjusting the pressure inside the sealed case.

  In the terminal block for a rotating electrical machine according to the present invention, the signal connector provided in the composite connector further relays a temperature measurement signal of the rotating electrical machine.

  Furthermore, in the terminal block for a rotating electrical machine according to the present invention, the composite connector that covers the opening of the case is arranged on a radially outer surface of the rotating electrical machine.

  Furthermore, in the terminal block for rotating electrical machines according to the present invention, the holding member includes a pressing plate that can withstand the internal pressure of the case, and a screw.

  Furthermore, in the terminal block for rotating electrical machines according to the present invention, each connection terminal provided on the power connector on the inside of the case is connected to each surface of the podium shape provided with a step to increase the insulation resistance. It is a terminal.

  In the rotating electrical machine terminal block according to the present invention, the composite connector that further covers the opening of the case is arranged on the upper part of the case.

  Moreover, in the terminal block for a rotating electrical machine according to the present invention, the signal connector provided in the composite connector is arranged at a position that can secure a space necessary for attaching and detaching a plurality of power cables connected to the power connector. It is characterized by.

  Moreover, in the terminal block for a rotating electrical machine according to the present invention, the seal member provided in the composite connector is a sheet-like seal member fitted into a protrusion provided on the back surface of the composite connector, and the entire circumference of the opening is provided. It has the bead part which covers.

  According to the present invention, space can be saved by the collective arrangement of a plurality of connectors, and the number of components attached to the case can be reduced.

  Hereinafter, embodiments of the present invention (hereinafter referred to as embodiments) will be described with reference to the drawings.

  FIG. 12 shows a front portion 400 of a hybrid vehicle, and shows the arrangement of terminal blocks 50 and 70 for rotating electrical machines provided in the power mechanism. The front portion 400 includes a power mechanism including the engine unit 100, a generator unit 200 connected to a power split mechanism (not shown), and an electric motor unit 300 that generates a driving force, and a tire connected thereto. 110 are arranged. In addition, an inverter device (not shown) is disposed on the generator unit 200 and the motor unit 300, and the cables connected to the rotating electrical machine terminal blocks 50 and 70 are connected to the inverter device.

(First embodiment)
FIG. 1 shows a rotating electrical machine terminal block 50 according to the first embodiment of the present invention provided in a generator unit 200. In the drawing, the power mechanism has a structure in which an engine unit 100, a generator unit 200, and an electric motor unit 300 are connected from the left side.

  What is characteristic in the present embodiment is that a composite connector having a power connector and a signal connector, and a composite connector mounting means considering the internal pressure of the case are provided. Further, the rotating electric machine terminal block 50 in the case where there is a margin in the depth direction (left and right direction in the figure) and there is a limitation in the lateral direction will be described below.

  The rotating electrical machine terminal block 50 provided in the generator unit 200 fixes the composite connector 10 having the power connector and the signal connector 13 covered with the shield shell 12 and the composite connector 10 to the generator unit 200. A plate 14 and a plate screw 47. The composite connector 10 was made of SPS (Syndiotactic Polystyrene (registered trademark)) excellent in heat resistance, dielectric properties, tracking resistance and electrical insulation, and the plate 14 was made of aluminum.

  In the rotating electrical terminal block 50, the bus cable 41 is connected by a bus cable connector 43. The bus cable connector 43 is fixed to the generator unit 200 by the cable stay 42 and the cable stay screw 45, and the shield shell 12 and the bus cable connector 43 are similarly fixed to the generator unit 200 by the shield shell screw 12. ing.

  FIG. 2 is an exploded perspective view of the rotating electrical machine terminal block 50 provided in the power generation unit 200, as viewed from the electric motor unit side. The composite connector 10 has a face seal 18 on its lower surface and is attached so as to seal the edge of a through hole provided in the generator unit 200.

  Next, the composite connector 10 will be described. The composite connector 10 is a tool insertion direction for fixing the bus cable terminal 22 to the power terminal plate 19 by screws and an insertion port in the B direction shown in the figure, which is a direction in which the power cable end portion 60 is inserted. And a signal connector to be inserted from the C direction.

  The composite connector 10 is connected to a power cable 17b and a signal cable 16b arranged inside the case. Outside the power connector, a seal cap 21 that covers the terminal portion of the three-phase power line and a shield shell 12 for magnetic shielding that covers the seal cap 21 are provided. These provide waterproofing and electromagnetic wave shielding functions. For the sake of explanation, a symbol a is assigned to a component arranged outside the case, and a symbol b is attached to a component arranged inside the case.

  3 is a front view of the terminal block 50 for a rotating electrical machine provided in the power generation unit 200, FIG. 4 is a front view, FIG. 5 is a side view, and FIG. 6 is a bottom view, which will be described below with reference to FIGS. To do. In addition, the description which overlaps in each drawing is omitted.

  FIG. 3 shows the rotating electrical machine terminal 50 and the power cable end 60. The rotating electrical machine terminal block 50 includes a power connector 11a, a composite connector 10 having a signal connector 13a, a plate 14 provided with a hole for the signal connector 13 and cut so that the composite connector 10 fits therein, Is included.

  In the figure, the power cable end 60 moves in the direction B in the figure and fits into the opening of the rotating electrical machine terminal block 50, so that the power terminal plate 19 and the bus cable terminal 22 are connected and sealed by the sealing material 44. The

  FIG. 4 shows a front view of the rotating electrical machine terminal block 50 of FIG. 3 as viewed from the B direction. The terminals inside the case are arranged obliquely for the sake of shortening the connection with the generator. The plate 14 is provided with positioning pins 15 for accurately positioning the terminal block 50 for rotating electrical machines.

  FIG. 5 shows a side view of the rotating electrical machine terminal block 50 of FIG. As shown in FIG. 5, the characteristic of the present embodiment is that the creepage distance between the terminal blocks is secured by making the terminals of the power connector 11 b inside the case have a podium structure. In addition, by arranging the signal connector 13 behind the power connector 11, even the composite connector 10 does not have a wider width than the bus cable.

  FIG. 6 is a back view of the terminal block 50 for rotating electrical machines shown in FIG. As shown in FIG. 6, the power connector 11b has a podium structure, and nuts are press-fitted and female threads are provided on the back surfaces of the power terminal plates 19 arranged alternately. Further, a plurality of snap projections 23 for temporarily fixing the surface seal 18 are provided on the back surface of the composite connector 10, and the surface seal 18 is provided so as to cover the back surface of the composite connector 10. Further, the plate 14 that has been cut so that the composite connector 10 fits into it considers the crushing margin of the face seal 18.

(Second Embodiment)
FIG. 7 shows a front view of the terminal block 70 for the rotating electrical machine provided in the electric motor unit 300. In 2nd Embodiment, it shows about the terminal block 70 for rotary electric machines when there exists restrictions in the depth direction.

  In the figure, the composite connector 80 includes a power connector 81 and a signal connector 83, and the power connector 81 and the signal connector 83 are arranged side by side. Further, since there is a limit in the depth direction, the power cable end is inserted from the front side of the terminal block 70 for the rotating electrical machine, and the power terminal plate 85 and the bus cable terminal 22 are fixed by screws from the C direction.

  FIG. 8 shows a side view of the terminal block 70 for a rotating electrical machine. In the second embodiment, the power connector 81b inside the case does not have a podium structure, and the creepage distance is secured by widening the width between the terminals compared to the outside of the case. The end of the power cable is inserted into the power connector 81a from the direction B in the figure, and the power terminal board 85 and the bus cable terminal 22 are fixed with screws. The power terminal board 85 provided inside the power connector is arranged with its height maintained. The signal connector 83 is provided with a signal line for measuring the temperature of the electric motor.

  FIG. 9 is a back view of the terminal block 70 for the rotating electrical machine. As in the first embodiment, positioning is performed by positioning pins 86 provided on the plate 84, the face seal 91 is temporarily fixed to the snap projection 92, and the composite connector 80 is outside the case of the motor unit 300 by the plate 84. It is pressed against and fixed.

  FIG. 10 shows a top view of the terminal block 70 for a rotating electrical machine. In the second embodiment, unlike the first embodiment, the power terminal plate 85 provided inside the power connector is arranged so as to spread from the central power terminal plate 85 to the left and right, and the power terminal plate inside the case 85 is arranged with a wider width than the outside of the case.

(Third embodiment)
FIG. 11 shows a front view of a terminal block 80 for a rotating electrical machine having a pressure valve 81. What is characteristic in the present embodiment is that the composite connector 10 is provided with a pneumatic valve 81 to reduce the number of parts, and the internal pressure that is a burden on the plastic composite connector 10 is held by a plate. This is a reduction. The atmospheric pressure valve 81 has a dustproof filter, and when the internal pressure becomes higher than the external atmospheric pressure, the valve that is closed by the built-in spring is opened due to the pressure difference, and the internal pressure is reduced.

  As described above, if this embodiment is used, even if there is a restriction on the location of the connector, it is possible to reduce the size of the terminal block for a rotating electrical machine that is provided with an installation space for the connector itself, a hermetic seal, and electromagnetic wave shielding measures. It becomes possible. In the present embodiment, a hybrid vehicle has been described as an example. However, the present invention is not limited to this.

It is a schematic diagram of the terminal block for rotary electric machines which concerns on the 1st Embodiment of this invention. It is a disassembled perspective view of the terminal block for rotary electric machines which concerns on 1st Embodiment. It is a front view of the terminal block for rotary electric machines which concerns on 1st Embodiment. It is a front view of the terminal block for rotary electric machines which concerns on 1st Embodiment. It is a side view of the terminal block for rotary electric machines which concerns on 1st Embodiment. It is a reverse view of the terminal block for rotary electric machines which concerns on 1st Embodiment. It is a front view of the terminal block for rotary electric machines which concerns on 2nd Embodiment. It is a side view of the terminal block for rotary electric machines which concerns on 2nd Embodiment. It is a reverse view of the terminal block for rotary electric machines which concerns on 2nd Embodiment. It is a top view of the terminal block for rotary electric machines which concerns on 2nd Embodiment. It is a front view of the terminal block for rotating electrical machines which has a pressure valve concerning a 3rd embodiment. It is a general view which shows the mounting state of the terminal block for rotary electric machines which concerns on this invention.

Explanation of symbols

  10,80 composite connector, 11,81 power connector, 12 shield shell, 13,83 signal connector, 14,84 plate, 15,86 positioning pin, 16 signal cable, 17 power cable, 18,91 face seal, 19, 85 Power terminal plate, 21 Seal cap, 22 Bus cable terminal, 23, 92 Snap projection, 41 Bus cable, 42 Cable stay, 43 Bus cable connector, 44 Seal material, 50, 70 Terminal block for rotating electrical machine, 60 Power Cable end part, 81 barometric valve, 100 engine unit, 110 tire, 200 generator unit, 300 motor unit, 400 front part.

Claims (10)

In a rotating electrical machine terminal block provided in a case incorporating a vehicle generator or electric motor (hereinafter referred to as a rotating electrical machine),
A composite connector in which a power connector that relays a plurality of power cables for guiding the power of the rotating electrical machine and a signal connector that relays a sensor signal for detecting the rotation angle of the rotating electrical machine;
A sealing member provided on the composite connector to seal the opening of the case;
A holding member that holds the composite connector against the case;
A terminal block for a rotating electrical machine, comprising: In the terminal block for rotating electrical machines according to claim 1,
Composite connector
Rotation characterized in that in order to ensure a creepage distance, the distance between each connection terminal provided on the power connector inside the case is larger than the distance between the connection terminals on the power connector outside the case. Electric terminal block. In the terminal block for rotating electrical machines according to claim 2,
Furthermore, the composite connector has a pressure valve for adjusting the pressure inside the sealed case. In the terminal block for rotating electrical machines according to claim 2,
The signal connector provided in the composite connector further relays a temperature measurement signal of the rotating electrical machine. In the terminal block for rotating electrical machines according to claim 2,
A terminal block for a rotating electrical machine, wherein the composite connector covering the opening of the case is disposed on a radially outer surface of the rotating electrical machine. In the terminal block for rotating electrical machines according to claim 1,
The holding member includes a holding plate that can withstand the internal pressure of the case, and a screw. In the terminal block for rotating electrical machines according to claim 2,
Each connecting terminal provided on the power connector on the inside of the case is a connecting terminal arranged on each surface of a podium-like shape provided with a step to increase the insulation resistance. . In the terminal block for rotating electrical machines according to claim 5,
Further, the terminal block for a rotating electrical machine, wherein the composite connector covering the opening of the case is disposed in the upper part of the case. In the terminal block for rotating electrical machines according to claim 5,
A terminal block for a rotating electrical machine, wherein the signal connector provided in the composite connector is arranged at a position that can secure a space necessary for attaching and detaching a plurality of power cables connected to the power connector. In the terminal block for rotating electrical machines according to claim 5,
The seal member provided in the composite connector is a sheet-like seal member fitted into a protrusion provided on the back surface of the composite connector, and has a bead portion covering the entire circumference of the opening. Terminal block.

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