JP5655317B2 - Terminal block for rotating electrical machines - Google Patents

Description

  The present invention relates to a rotating electrical machine terminal block provided in a case containing a rotating electrical machine that is an electric motor or a generator.

  Conventionally, there are known an electric vehicle that drives a vehicle with electric power from a battery, a fuel cell vehicle that drives a vehicle with electric power generated by a fuel cell, and a hybrid vehicle that combines an engine and a rotating electric machine that is an electric motor or generator. It has been. These automobiles not only drive the vehicle by controlling the electric power obtained from the battery etc. to the motor by an inverter, but also charge the regenerative power to the battery by causing the motor to function as a generator during braking. To do. In addition, in a hybrid vehicle, when the charge amount of the battery decreases, the generator can be driven by the engine to charge the battery, so that the charging work required for the electric vehicle is not required. Actively use the rotating electrical machine that is the generator.

  A hybrid vehicle includes a battery as a vehicle drive power source in addition to a conventional engine-driven vehicle, an inverter that controls electric power of the battery to supply the rotating electrical machine, a connection cable that can supply a large current to the rotating electrical machine, and the like. Since it is mounted on a vehicle having a limited mounting space, each device is downsized compared to a conventional engine-driven vehicle. In hybrid vehicles, an engine, a rotating electrical machine, a power distribution mechanism, and a speed change mechanism are built in and integrated in a transaxle case (hereinafter also referred to as a case). And connected.

  In a hybrid vehicle, a high voltage of 500 volts or more is used as the voltage supplied to the rotating electrical machine by the inverter in order to improve the performance as an electric vehicle. In order to use such a high voltage, it is necessary to take measures to reduce noise in the high voltage section and to prevent short circuits in oil-cooled rotating electrical machines and terminals. Further, the cable connecting the rotating electrical machine and the inverter needs to be securely fixed to the case or the vehicle body in order to withstand vibrations from the vehicle, the rotating electrical machine, and the cable. Therefore, the shield coating, waterproof coating, and the wiring and fixing method are optimized for the cable that supplies high voltage, and the three-phase AC power line connected to the rotating electrical machine secures a predetermined creepage distance to the terminal block. In addition, the electromagnetic noise emission from the terminal block is reduced by the shield cover.

  In particular, the terminal block and the cable connected to the terminal block are exposed to vibrations generated when the vehicle travels, and therefore vibration measures are required. Therefore, Patent Document 1 discloses a connector fixing mechanism that can absorb vibration from a cable. The connector fixing structure disclosed in Patent Document 1 includes a first connector provided in a housing that houses a rotating electrical machine or the like mounted on a vehicle, and a second connector provided in a cable connected to the first connector. The second connector in the connection is fixed, and the cable is fixed using a clamp that absorbs vibration from the cable. However, the connector disclosed in Patent Document 1 relates to a power supply connector, and it is necessary to provide a separate sensor connector for the rotation angle necessary for controlling the rotating electrical machine and a signal connector for measuring the coil temperature of the stator. In addition, it is difficult to secure a space for installing the power supply and signal connectors.

  Therefore, as disclosed in Patent Document 2, the applicant according to the present invention discloses a terminal block for a rotating electrical machine in which a connector for power supply and a connector for sensor are combined to form a composite connector. 7 shows a conventional terminal block, FIG. 8 shows an exploded view of the rotary electric machine terminal block 150 of FIG. 7, and FIG. 9 shows a cross-sectional view of the rotary electric machine terminal block 150. Yes. 7 is provided in a transaxle case including an engine unit 250, a generator unit 260 connected to a power split mechanism, and an electric motor unit 270 that generates a driving force. The composite connector 110 is connected to the rotating electrical machine of the generator unit 260 and is connected to the power bus cable 141 via the power bus cable connector 143, and signals such as the rotation angle of the rotating electrical machine are connected to the signal connector 113. Has been. The material of the composite connector 110 is SPS (Syndiotactic Polystyrene (registered trademark)) excellent in heat resistance, dielectric properties, tracking resistance, and electrical insulation properties.

  As shown in FIG. 8, in the rotating electrical machine terminal block 150, the composite connector 110 including the power connector 111, the signal connector 113, and the sealing material 118 covered with the shield shell 112 blocks the opening of the generator unit 260. Thus, the plate 114 is pressed from above. Further, as shown in FIG. 9, the generator unit 260 is provided with an opening for connecting the power connector 111 and the signal connector 113, and the edge of the opening is sealed with a surface sealing material 118. The opening of the generator unit 260 is sealed by pressing the composite connector 110 with the plate 114 and the plate screw 147 of FIG.

  The rotating electric machine terminal block 150 of FIG. 8 has a power bus cable 141 extending along the generator unit 260 connected by a power bus cable connector 143 (direction B in the figure), and the terminals of the UVW-phase power bus cable 141 generate power. It is fixed to the machine unit 260 from the vertical direction (C direction in the figure) by the plate screw 147 of FIG. 9, and a waterproof seal cap 121 is fitted. Further, as shown in FIG. 9, the power bus cable connector 143 is fixed to the generator unit 260 by a cable stay 142 and a cable stay screw 145, and the shield shell 112 and the cable stay 142 are fixed by a shield shell screw 146. Yes. With such a configuration, the composite connector 110 including the power connector 111 and the signal connector 113 can be realized.

JP 2005-235443 A JP 2008-301544 A

  However, when the rotating electrical machine terminal block 150 is mounted on the vehicle, the plate 114 functions as a reinforcing material and an electromagnetic shield. Therefore, even when the electromagnetic shield is replaced with another shield provided on the power bus cable 141, the plate 114 is not provided. It could not be removed and it was difficult to reduce the number of parts. Further, the vibration noise from the gear which is the generation source of the vibration noise passes through the case, and the plate 114 which has been the cover of the terminal block resonates to emit the vibration noise. There is also a method of eliminating the plate 114 by greatly increasing the resin thickness of the base of the plate 114, but it is necessary to increase the size in order to obtain the same strength with the resin alone. In some cases, the pedestal may be deformed due to insufficient strength of the screw coupling portion fixed to the base.

  Accordingly, in order to solve the above-described problems, an object of the present invention is to provide a rotating electrical machine terminal block that maintains strength while having a configuration in which the number of parts of the rotating electrical machine terminal block according to the present invention is reduced compared to conventional products. And

In order to achieve the above object, a terminal block for a rotating electrical machine according to the present invention is a power connector that relays power to the rotating electrical machine in the terminal block for the rotating electrical machine provided in a case incorporating the rotating electrical machine. And a signal connector for relaying a sensor signal for detecting a rotation angle of the rotating electrical machine, the power connector and the signal connector, and a metal collar for fixing are insert-molded with a molten resin. A pedestal that covers the opening of the case; and a seal member that closely contacts the case and the pedestal, wherein the pedestal is reinforced by ribs, and the sealing member is configured such that the opening is reinforced by the reinforced pedestal. sealed, the ribs, and the ribs of the inner and outer peripheral direction of the pedestal, the radial ribs extending radially from said power connector state, and are, the ribs provided on the pedestal, The ribs der Rukoto erected on the upper surface of the sealing member arranged on the lower surface of serial pedestal characterized. Thus, not only can an integrated terminal block be realized by insert molding, but a rib shape having a high degree of freedom can be formed by injection molding. Here, the ribs in the inner and outer peripheral directions can make the pressing of the seal member uniform, and the strength is improved together with the radial ribs that further reinforce the ribs in the inner and outer directions.

  In addition, in the terminal block for a rotating electrical machine according to another invention, the collar is fixed to the case with a screw, and is in close contact with the insert-molded resin in order to withstand the load generated by the internal and external pressure difference of the case and the vibration during operation. And a retaining member for engaging. In addition, in the terminal block for a rotating electrical machine according to another invention, the retainer provided on the collar has an uneven stepped shape on an outer peripheral portion of the collar so as to engage with the resin. To do. Moreover, in the terminal block for a rotating electrical machine according to another invention, a part of the outer peripheral portion of the collar is reinforced by the rib.

  The terminal block for a rotating electrical machine according to the present invention integrates the collar by insert molding, and enables the reduction of the number of parts while maintaining strength by combining the inner and outer peripheral ribs and the radial ribs and standing on the pedestal. effective.

It is a front view which shows the outline | summary of the terminal block for rotary electric machines which concerns on this invention. It is explanatory drawing explaining the method of connecting an electric power bus cable to the terminal block for rotary electric machines shown in FIG. It is a side view of the terminal block for rotary electric machines of FIG. It is explanatory drawing explaining the state which fixed the terminal block for rotary electric machines of FIG. 1 to the case. It is a perspective view of the terminal block for rotary electric machines of FIG. It is a perspective view of the terminal block for rotary electric machines of FIG. It is explanatory drawing explaining the attachment state of the conventional terminal block for rotary electric machines. It is explanatory drawing explaining the assembly | attachment method of the conventional terminal block for rotary electric machines. It is sectional drawing of the conventional terminal block for rotary electric machines.

  Hereinafter, the best mode for carrying out the present invention (hereinafter referred to as an embodiment) will be described with reference to the drawings.

  FIG. 1 shows a front view of a terminal block 10 for a rotating electrical machine, and the terminal block for a rotating electrical machine will be outlined with reference to FIG. The rotating electrical machine terminal block 10 includes a power connector 11 that relays power to the rotating electrical machine, a signal connector 13 that relays a rotation angle signal of the rotating electrical machine, and a fixing metal provided on the pedestal 12. It has a collar 14, a bottom plate 20, inner and outer peripheral ribs 16, radial ribs 17, a surface sealing material 18 indicated by broken lines, and positioning pins 22 and 23. The power connector 11 is provided with three UVW-phase power terminal plates 19, and the signal connector 13 is provided with signal pins, which are integrally formed with four collars 14 by insert molding.

  One of the characteristic features of the terminal block 10 for rotating electrical machines according to the present embodiment is that the inner and outer peripheral ribs 16 and the radial ribs 17 are combined and disposed on the bottom plate 20 to improve the strength of the bottom plate 20 and vibrate. In addition to implementing noise countermeasures, the face seal material 18 can be pressed uniformly. Another characteristic feature is that the collar 14 is arranged to improve the strength of the screw coupling portion 21 that fixes the terminal block 10 for the rotating electrical machine to the case, and inner and outer peripheral ribs are used to reinforce the periphery of the collar. 16 is arranged close to the collar, and the radial ribs 17 are connected to the inner and outer peripheral ribs 16. By adopting such a configuration, it is possible to improve the strength and reduce the size.

  FIG. 2 shows a method of connecting the power bus cable 34 to the rotating electrical machine terminal block 10 shown in FIG. The rotating electrical machine terminal block 10 is positioned by fitting positioning pins 22 and 23 into pins provided in a case (not shown), and is fixed to the case with screws. The power bus cable 34 is provided with a power bus cable connector 33 provided with three power bus terminals 36, a fixing cable stay 32, and a waterproof seal 35 that prevents water from entering the power bus terminals 36. ing. In the present embodiment, the power bus cable 34 is inserted into the power connector 11 of the rotating electrical machine terminal block 10 from the direction B shown in FIG. 2, and the power bus terminal 36 is attached to the power terminal board 19 with screws from the direction A in FIG. Conduct by fixing. Similarly, the signal connector is inserted from the B direction and fixed by the lock mechanism to make it conductive.

  FIG. 3 shows a side view of the terminal block 10 for a rotating electrical machine, and FIG. 4 shows a cross section when the terminal block for the rotating electrical machine is fixed to a case. 3, the inner and outer peripheral ribs 16 and the radial ribs 17 for reinforcing the bottom plate 20 of the pedestal and the opening (through hole) provided in the case in close contact with the case are hermetically sealed. A surface sealing material 18 is supported by a surface sealing stopper 25. In addition, a partition plate 15 for securing a creeping distance from the adjacent power terminal plate 19 is provided inside the case.

  The collar 14 provided in the screw coupling portion 21 of the terminal block 10 for the rotating electrical machine is disposed so as to be in close contact with the case, and the inner and outer peripheral ribs 16 are disposed in the vicinity of the collar 14. The inner and outer peripheral ribs prevent deformation of the terminal block attached from the outside of the case due to a pressure difference between the inside and outside of the case. Also, the inner and outer peripheral ribs 16 are not provided in the outermost peripheral portion on the outer side of the collar for weight reduction.

  The collar 14 of this embodiment shown in the enlarged view of FIG. 3 has a bobbin shape in which the waist is recessed to prevent the collar 14 from coming off the pedestal due to screw fastening, vehicle vibration, or the like. . In addition, as other embodiments, a shape in which the collar circumference is convex or an abacus ball shape in which the circumference is expanded at an acute angle is also suitable.

  FIG. 4 is a cross-sectional view when the rotating electrical machine terminal block is fixed to the case 40, and the inner and outer peripheral ribs around the collar are omitted for explanation. In the present embodiment, consideration is given to reducing the load generated by the pressure difference between the inside and outside of the case and resonance due to vibration noise by making the area of the opening provided in the case 40 narrower than the conventional shape. Further, the inner and outer peripheral ribs 16 a are erected on the left-side face seal material 18 a in FIG. 4 and are reinforced by being connected to the radial ribs 17. In order to provide a space for connecting the power terminal plate 19 and the power bus terminal on the right surface sealing material 18b in FIG. 4, the inner and outer peripheral ribs 16b shorter than the left inner and outer peripheral ribs 16a, Although the radial ribs 17b are shorter than the radial ribs 17b, the left and right sides are substantially the same in terms of strength. In FIG. 4, for the sake of explanation, the inner and outer peripheral ribs 16 positioned substantially at the center of the screw for fixing the collar 14 to the case 40 are omitted, but the terminal block is reinforced by these ribs. Not too long.

  FIG. 5 is a perspective view of the terminal block 10 for a rotating electrical machine, and FIG. 6 is a perspective view of the back surface. In the rotary electric machine terminal block 10 of FIG. 5, the inner and outer peripheral ribs 16 c that cover approximately half of the outer periphery of the collar 14 c of the screw coupling portion 21, and the radial ribs 17 c that are provided to reinforce the inner and outer peripheral ribs 16 c Inner and outer peripheral ribs 16b and radial ribs 17b provided in a certain region are provided. Here, the inner and outer peripheral ribs 16b are shorter than the inner and outer peripheral ribs 16c, and the radial ribs 17b are the same. However, in this embodiment, it is possible to obtain almost the same strength even if there is a space limitation. .

  The face seal material 18 in FIG. 6 is disposed along the inner and outer peripheral ribs in FIG. 5 and is attached to the rotating electrical machine terminal block 10 by engaging with a face seal stopper 25 for supporting the face seal material. . In addition, by arranging the power connector 11 and the signal connector 13 side by side in the space surrounded by the face seal material 18, it is possible to reduce the area of the case opening and realize a resin terminal block. It becomes possible to do.

  As described above, the terminal block for rotating electrical machines according to the present embodiment integrates the collar by insert molding, and maintains the strength by combining the inner and outer peripheral ribs and the radial ribs and standing on the pedestal. The number of points can be reduced.

  10,150 Rotating electrical machine terminal block, 11,111 Power connector, 12 Base part, 13,113 Signal connector, 14 Collar, 15 Partition plate, 16 Inner and outer peripheral ribs, 17 Radial ribs, 18, 118 Face seal material, 19 power terminal plate, 20 bottom plate, 21 screw joint, 22, 23 positioning pin, 25 face seal stopper, 32, 142 cable stay, 33, 143 power bus cable connector, 34, 141 power bus cable, 35 waterproof seal, 36 Power Bus Terminal, 40 Case, 110 Composite Connector, 112 Shield Shell, 114 Plate, 118 Seal Material, 121 Seal Cap, 145 Cable Stay Screw, 146 Shield Shell Screw, 147 Plate Screw, 250 Engine Unit, 260 Power Generation Machine unit 270 motor unit.

Claims (4)

In the terminal block for rotating electrical machines provided in the case incorporating the rotating electrical machine,
A power connector for relaying power to the rotating electrical machine;
A signal connector for relaying a sensor signal for detecting a rotation angle of the rotating electrical machine;
The power connector and the signal connector, and a fixing metal collar, a pedestal that covers the opening of the case insert-molded with molten resin,
A seal member for bringing the case and the base into close contact with each other;
Have
The pedestal is reinforced by ribs, and the sealing member seals the opening by the reinforced pedestal,
The rib has a rib of the inner periphery direction of the pedestal, the radial ribs extending radially from said power connector state, and are,
Wherein the rib provided on the pedestal, the rotary electric machine terminal blocks Ru ribs der erected on the upper surface of the sealing member arranged on the lower surface of the pedestal. In the terminal block for rotating electrical machines according to claim 1,
The collar is fixed to the case by a screw, and rotates to have a retainer for engaging and engaging with an insert-molded resin in order to withstand a load generated by a pressure difference between the inside and outside of the case and vibration during operation. Electric terminal block. In the terminal block for rotating electrical machines according to claim 2 ,
The retainer provided on the collar is a terminal block for a rotating electrical machine having an uneven stepped shape on an outer peripheral portion of the collar so as to engage with the resin. The rotating electric machine terminal block according to any one of claims 1 to 3
A part of the outer peripheral portion of the collar is a terminal block for a rotating electrical machine reinforced by the rib.

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