JP6593815B2 - Electric power steering device - Google Patents

Description

  The present invention relates to an electric power steering apparatus using a control unit that controls driving of a motor.

  A control unit that controls driving of the motor includes a plurality of connectors corresponding to a large number of sensors and power supply systems. Specifically, for example, there are a plurality of types of connectors, such as a power connector and a signal connector, depending on the magnitude of the current flowing through the connector, and there are also a plurality of types of terminals in accordance therewith.

  As an example of such a control unit, the motor and the control unit are integrated on the same axis as the motor output shaft, the control unit is arranged on the opposite side of the motor output side, and the connector is arranged at the final end of the control unit. Such a driving device is known (see, for example, Patent Document 1).

  The power connector, signal connector, and torque signal connector are provided so as to protrude radially outward from the motor case. The torque signal connector is separated from the power connector by a predetermined distance and connected to the torque signal line of the torque signal connector. A drive device is known in which the portion is formed to face the motor side in the axial direction of the motor case (see, for example, Patent Document 2).

JP 2013-207963 A JP 2012-143036 A

However, the prior art has the following problems.
In the drive devices described in Patent Documents 1 and 2, since the orientation, type, and shape of the connector vary depending on the vehicle to be mounted, there is a problem that the connector and its surroundings must be redesigned each time according to the vehicle. is there.

  That is, in the drive device of Patent Document 1, changing the type of connector not only replaces the connector itself, but also changes the shape of the hole opened in the cover, and seals the cover and the component carrier as the contents. There is a need to. Moreover, in the drive apparatus of patent document 2, when changing the direction of a connector according to a vehicle, it is necessary to redesign from a cylindrical part other than a connector.

  The present invention has been made to solve the above-described problems, and even when the specifications such as the orientation, type, and shape of the connector are changed, only the design change of the connector portion can be used. It is an object to obtain an electric power steering apparatus using a control unit that can realize design and manufacturing efficiency.

  An electric power steering apparatus according to the present invention is an electric power steering apparatus including a control unit having a control board for controlling driving of a motor and a motor, and the control unit is coaxial with a motor output shaft of the motor. The control unit includes a connector assembly provided on the side opposite to the motor output side, and is integrated with the motor on the opposite side of the motor output side. A power source large current connector disposed on the end surface opposite to the motor output side in the same direction as the motor output shaft, and a signal small current connector disposed in the same direction as the motor output shaft; A component mounting portion including at least one of a capacitor and a coil, and the large current connector, the small current connector and the component mounting portion are separated for each region. A first extension terminal that electrically connects the high current connector and the component mounting part, a second extension terminal further extending from the component mounting part, and a third extension terminal extending from the small current connector The first extension terminal, the second extension terminal, and the third extension terminal are separately disposed, and the first extension terminal, the second extension terminal, and the third extension terminal are connected to the connector assembly. The large current connector, the small current connector, the component mounting portion, the first extension terminal, the second extension terminal, and the third extension terminal are arranged separately for each region. The connector assembly is provided with a window, and at least the third extension terminal is disposed in the window, and extends from the control board in the window. The one in which is connected to the terminal.

According to the electric power steering apparatus according to the present invention, the connector assembly includes a power supply system large current connector disposed on the end surface opposite to the motor output side in the same direction as the motor output shaft, and the motor. It has a signal system small current connector arranged in the same direction as the output shaft, and a component mounting part including at least one of a capacitor and a coil. The high current connector, the small current connector and the component mounting part are respectively Are arranged separately for each area.
Therefore, even if the specifications such as the orientation, type, and shape of the connector are changed, it can be dealt with only by changing the design of the connector portion, and the efficiency of design and manufacturing can be realized.

1 is a circuit diagram showing an overall circuit configuration of an electric power steering apparatus to which a control unit according to Embodiment 1 of the present invention is applied. FIG. 1 is a cross-sectional view showing an electric power steering device according to Embodiment 1 of the present invention. FIG. 3 is a perspective view of the electric power steering device shown in FIG. 2 as viewed from above. It is a circuit diagram which shows the whole circuit structure of the electric power steering apparatus with which the control unit which concerns on Embodiment 2 of this invention was applied. It is sectional drawing which shows the electric power steering apparatus which concerns on Embodiment 2 of this invention. FIG. 6 is a perspective view of the electric power steering device shown in FIG. 5 as viewed from above. It is the perspective view which looked at the electric power steering device which concerns on Embodiment 3 of this invention from upper direction. It is sectional drawing which cut | disconnects the electric power steering apparatus shown in FIG. 7 by the AA line, and shows only a connector assembly. FIG. 8 is another cross-sectional view showing only the connector assembly by cutting the electric power steering device shown in FIG. 7 along the line AA.

  Hereinafter, preferred embodiments of a control unit according to the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts will be described with the same reference numerals. The control unit according to the present invention is integrated with the motor coaxially with the motor output shaft, and is disposed on the side opposite to the output side of the motor.

  In the following, a case where the control unit is applied to an electric power steering apparatus will be described as an example. However, the present invention is not limited to this, and the control unit may be an electric power steering as long as it controls the drive of a motor. It may be other than that applied to the apparatus.

Embodiment 1 FIG.
1 is a circuit diagram showing an overall circuit configuration of an electric power steering apparatus to which a control unit according to Embodiment 1 of the present invention is applied. In FIG. 1, the electric power steering apparatus is connected to a battery 1, an ignition switch 2, and sensors 3 provided on the vehicle side.

  The electric power steering apparatus includes a motor 4 and a control unit 5. In addition, although this Embodiment 1 demonstrates the case where the motor 4 is a 3 phase brushless motor, it is not limited to this, A multi-phase winding motor with a brush or 3 phases or more may be sufficient.

  A rotation sensor 4a for detecting the rotation angle of the motor output shaft is disposed in the vicinity of the motor output shaft of the motor 4, and the control unit 5 is disposed coaxially with the motor output shaft and on the opposite side to the output extraction of the motor output shaft. Has been.

  The control unit 5 mainly includes a control board 10 on which the CPU 13 is mounted, an inverter circuit 20 that supplies current to the motor 4, a component mounting portion 30 on which relatively large components are mounted, and connectors 6, 7, and 31. It is configured. The connectors 6 and 7 correspond to small current connectors, and the connector 31 corresponds to a large current connector.

  The control board 10 detects, for example, a constant power supply 11 of 5 V, an input circuit 12 of the sensors 3, a CPU 13 that calculates a control amount, a drive circuit 14 that drives the inverter circuit 20, and a voltage or current of each part in the inverter circuit 20. A monitor circuit 15 that receives an output from the rotation sensor 4a is also included.

  The inverter circuit 20 includes six switching elements T1 to T6 provided on the upper and lower arms corresponding to each phase of the motor 4 that is a three-phase brushless motor, a relay RY that supplies or cuts off power, and a capacitor that suppresses control ripple. C1, three shunt resistors Ra to Rc for detecting current, and three amplifiers AMa to AMc for converting the detected current into a voltage and amplifying it. Here, these parts or a part of them are constituted by IC parts called a power module (PM).

  The component mounting unit 30 includes capacitors Ca, Cb, Cc and a coil CL that suppress noise with respect to the battery power supply system. Here, since these components are relatively large, for example, a large mounting area is required to mount them on the control board 10 or the inverter circuit 20, so it is better to install them in another place in terms of area. is there. Further, considering the connection of these components, the vicinity of the connectors 6, 7, and 31 is more effective in terms of electrical connectivity and noise suppression. Therefore, these components are separately arranged on the component mounting unit 30.

  FIG. 2 shows the structure of the electric power steering apparatus for the circuit configuration as described above. FIG. 2 is a cross-sectional view showing the electric power steering apparatus according to Embodiment 1 of the present invention. In FIG. 2, the motor 4 includes a rotor 41 in which a permanent magnet (not shown) is mounted around a motor output shaft 43, and a stator 42 provided around the rotor 41 and having a three-phase winding 44 wound thereon. It is built in the yoke 46.

  A lower frame 48 and a speed reducer 49 are provided below the yoke 46, and the rotation of the motor output shaft 43 is transmitted to the speed reducer 49. Here, in FIG. 2, the lower direction in the figure is the output side, and the upper direction is the opposite side to the output side, that is, the opposite output side.

  Further, an upper frame 47 is provided on the upper side of the yoke 46 on the side opposite to the output side of the motor 4, and three extension windings 45 drawn from the three-phase windings 44 (only two are shown in FIG. 2) are provided. The upper frame 47 extends upward. Further, the upper part of the upper frame 47 is the control unit 5, and the control unit 5 is coaxial with the motor output shaft 43 and is disposed on the opposite side to the output side of the motor 4.

  In the control unit 5, three PMs (only two are shown in FIG. 2) constituting the inverter circuit 20 are arranged in close contact with the upper frame 47. Moreover, a part of leg part of the inverter circuit 20 is connected with the extension winding 45, and another leg part is extended upwards.

  On the inverter circuit 20, the intermediate member 21 and the control board 10 are laminated and disposed. A CPU 13 and a drive circuit 14 are mounted on the control board 10. In addition, a plurality of legs from the inverter circuit 20 are connected to the control board 10, and a terminal extends upward from the control board 10.

  A connector assembly 9 is provided on the upper and outer peripheral portions of the control unit 5. The connector assembly 9 serves as a cover for the control unit 5, and the connectors 6, 7, 31 and the component mounting portion 30 are disposed on the upper surface 9a. The connector assembly 9 is formed of an insulating resin for the complexity of its shape, the necessity for insulation, and integration with the connector body.

  Further, by arranging the connectors 6, 7, and 31 in substantially the same direction as the motor output shaft 43 and inside the outer diameter of the motor 4, the maximum outer diameter of the control unit 5 becomes less than or equal to the outer diameter of the motor 4. The plurality of parts constituting the control unit 5 can all be accommodated within the outer diameter of the motor 4.

  Next, the structure of the connector assembly 9 will be described with reference to FIG. 3 together with FIG. FIG. 3 is a perspective view of the electric power steering apparatus shown in FIG. 2 as viewed from above. 2 and 3, three connectors of an ignition connector 6, a sensor connector 7, and a battery connector 31 are arranged on the upper surface 9 a of the connector assembly 9. In addition, a plurality of contact pins 6a, 7a, 31a, 31b are arranged in each connector 6, 7, 31.

  In the ignition connector 6 and the sensor connector 7, the contact pins 6a and 7a extend through the upper surface 9a of the connector assembly 9 as extension terminals 6b and 7b in the upward direction in FIG. . The extension terminals 6b and 7b correspond to a third extension terminal. The extension terminals 6 b and 7 b gather near the outer periphery of the connector assembly 9 and are connected to another terminal 8 a extending from the control board 10 at the window 8. This connection portion corresponds to a second connection portion.

  In the battery connector 31, the contact pins 31a and 31b penetrate the upper surface 9a of the connector assembly 9 and are connected to the bus bars 31c and 31d, like the contact pins 6a and 7a. These bus bars 31c and 31d extend toward the component mounting portion 30 as a power source and a ground. These bus bars 31c and 31d correspond to a first extension terminal.

  Capacitors Ca, Cb, Cc and a coil CL are mounted on the component mounting portion 30, and these leg portions and bus bars 31c, 31d are connected to each other. The bus bars 31g and 31h extending from these components are extended to the window portion 8, and connected to the power supply terminals 31e and 31f extending to the PM constituting the inverter circuit 20 in the window portion 8.

  Here, the bus bars 31g and 31h extending from the component mounting part 30 to the power terminals 31e and 31f correspond to the second extension terminal, and the connection part between the bus bars 31g and 31h and the power terminals 31e and 31f is the first connection part. It corresponds to. The upper portion of the window portion 8 is covered with a cover 33, and the upper portion of the component mounting portion 30 is similarly covered with a cover 32.

  The bus bars 31c, 31d, 31g, 31h and the extension terminals 6b, 7b are formed on the back side of the upper surface 9a of the connector assembly 9 by insert molding or outsert molding to the connector assembly 9. In FIG. 3, such a state of a bus bar, a terminal, and a large component is shown as a perspective view. Thus, by arranging not only the connectors 6, 7, and 31 but also the component mounting portion 30 within the outer diameter of the motor 4, the area can be used effectively.

  Note that the battery connector 31 for large current is divided at the second extension terminal or the first connecting portion when distributing power to a plurality of parts with respect to the components built in the control unit 5.

  In addition, although the contact pins 6a, 7a, 31a, 31b, the bus bars 31c, 31d, 31g, 31h and the terminals 6b, 7b, 8a, 31e, 31f have been described with a three-part configuration, a two-part configuration may be used. At this time, for example, the contact pin 6a and the terminal 6b can be integrated, or the terminal 8a and the terminal 7b can be integrated to form a two-part configuration.

  The contact pins 6a, 7a, 31a, 31b pass through the upper surface 9a of the connector assembly 9, but the extension terminals 6b, 7b connected to the contact pins 6a, 7a, 31a, 31b, the bus bar 31c, By integrating with 31d and insert molding inside the resin of the connector assembly 9, the penetrating structure can be abolished and the waterproofness can be improved.

  As described above, although the battery connector 31 for large current, the ignition connector 6 and the sensor connector 7 for relatively small current are arranged adjacent to each other, they are arranged so that they can be divided into respective areas. A gap is provided between the connectors 6, 7, and 31. In addition, the component mounting portion 30 is arranged with a gap without dividing the built-in components and dividing the connectors 6, 7, 31, and the extension terminals 6 b, 7 b are also collectively integrated with the connector assembly 9. It is arranged near the outer periphery.

  That is, equivalent parts, for example, the connectors 6, 7, 31 are grouped, and the component mounting part 30 and the extension terminals 6b, 7b are separately and independently arranged so that their arrangement areas do not intersect. Therefore, for example, even when the specifications such as the direction, type, and shape of the connector differ depending on the vehicle, it can be dealt with only by changing the design of the connectors 6, 7, 31 of the connector assembly 9, The change does not extend to the extension terminals 6b and 7b.

  In FIG. 1, only one set of the three-phase motors 4 is provided. For example, in the case of two sets, another set of inverter circuits 20 is added. For this reason, two sets of power supply terminals are required for the battery connector 31 and the component mounting portion 30 and thereafter.

  Here, it is more efficient to branch the two sets of power supply terminals on the upper surface 9a of the connector assembly 9 and in the vicinity of the component mounting portion 30 than to branch and extend in the control unit 5. . That is, the upper surface 9a of the connector assembly 9 has room for branching the power supply terminal, and by branching in the vicinity of a component for suppressing noise, a high effect can be obtained in terms of noise.

  Therefore, only a part due to the difference in the vehicle can be changed and the other most part can be shared, so that the design can be made more efficient and the variety of models can be suppressed. Moreover, although it is the arrangement | positioning which provided the clearance gap between each connector 6,7,31 and the component mounting part 30, since it arrange | positions collectively within each area | region, size reduction is realizable.

As described above, according to the first embodiment, the connector assembly includes a high-current power supply connector disposed on the end surface opposite to the motor output side in the same direction as the motor output shaft; A signal system small current connector arranged in the same direction as the motor output shaft, and a component mounting portion including at least one of a capacitor and a coil. The high current connector, the small current connector and the component mounting portion are: It is arranged separately for each area.
Therefore, even if the specifications such as the orientation, type, and shape of the connector are changed, it can be dealt with only by changing the design of the connector portion, and the efficiency of design and manufacturing can be realized.
In other words, by separating the arrangement area of each part, a connector that is often changed, in particular, only changes the connector part and does not need to be changed to other parts, thereby realizing design and manufacturing efficiency. Can do.

Embodiment 2. FIG.
In the second embodiment of the present invention, in the electric power steering apparatus having a circuit configuration and a connector that are partially different from those of the first embodiment described above, commonality and differences between the two will be described.

  FIG. 4 is a circuit diagram showing an overall circuit configuration of an electric power steering apparatus to which a control unit according to Embodiment 2 of the present invention is applied. FIG. 5 is a cross-sectional view showing an electric power steering apparatus according to Embodiment 2 of the present invention. 6 is a perspective view of the electric power steering apparatus shown in FIG. 5 as viewed from above.

  In FIG. 4, the winding specification of the motor 4 </ b> A is changed from the Δ (delta) connection to the Y (star) connection. Further, the inverter circuit 20A is partially changed, and switching elements T7 to T9 are added. These changes hardly appear in FIG. 5 and can be dealt with by changes at the component level.

  However, in FIG. 5, the connectors 6A, 7A, 31A are changed from those in FIG. 2, and the connector assembly 9A is forced to be significantly changed. The specifications of the connector are often changed depending on the vehicle and the mounting state, and are often specified by the car manufacturer. In addition, the orientation of the connector is often changed due to interference with the parts around the vehicle or the positional relationship. On the other hand, when the connector is changed, the wiring of the connector harness is also changed, and when the control specifications are also changed, for example, the component mounting portion 30A may need to be changed.

  In such a situation, how to achieve commonality is an issue in actual design. Hereinafter, focusing on this point, FIGS. 5 and 6 will be described in comparison with the first embodiment described above.

  In FIGS. 5 and 6, the connector 31 </ b> A is particularly disposed in a direction substantially orthogonal to the motor output shaft 43. Further, the specifications of the connectors 6A and 7A and the number of contact pins are different.

  Here, the contact pins 6Aa and 7Aa of the small current connectors 6A and 7A are extended as extension terminals 6Ab and 7Ab, respectively, in the same manner as in the first embodiment, and are combined on the outer peripheral portion of the connector assembly 9A. In 8A, it connects with extension terminal 8Aa extended from the control function 10A. Note that the upper portion of the window portion 8A is covered with a cover 33A as in the first embodiment.

  On the other hand, for the component mounting portion 30A, the built-in component shape and specifications are different from those of the first embodiment, but the respective components are sequentially arranged in the empty space adjacent to the high current connector 31A according to the circuit configuration. They are arranged together. Further, the leg portions of these components are connected to bus bars 31Ac and 31Ad for power supply or ground, respectively.

  The final ends of the bus bars 31Ag and 31Ah extending from the component mounting portion 30A are connected to the power supply terminals 31Ae and 31Af at the left end in FIG. These components and the power terminals 31Ae and 31Af are covered together with a cover 32A. Similarly to the first embodiment, the bus bars 31Ac and 31Ad are formed on the back side of the upper surface 9Aa of the connector assembly 9A by insert molding or outsert molding on the connector assembly 9A.

  As described above, the connector 31A for large current, the bus bars 31Ac, 31Ad, and the component mounting portion 30A are arranged almost linearly and the wiring is made at the shortest distance, so that the bus bar member can be minimized. Can be obtained. Further, since the bus bars 31Ag and 31Ah to the power terminals 31Ae and 31Af are also arranged in a straight line, not only the reduction of the members of the bus bar but also the area efficiency can be maximized.

  Further, in order to assemble the connectors 6A, 7A, 31A to the connector assembly 9A or integrally mold them, there are these contacts around the contact pins 6Aa, 7Aa, 31Aa, 31Ab of the connectors 6A, 7A, 31A. Holes 6B, 7B, 31B (two-dot chain lines in the figure) for penetrating the pins 6Aa, 7Aa, 31Aa, 31Ab are provided. These holes 6B, 7B and 31B are almost the same even when the specification of the connector is changed from that of the first embodiment to that of the second embodiment.

  Therefore, the connector assembly 9A can be designed in common up to the holes 6B, 7B, 31B for the contact pins 6Aa, 7Aa, 31Aa, 31Ab. Further, by arranging the component mounting portion 30A in a place almost the same as in the first embodiment, the difference in bus bar arrangement can be minimized.

  Therefore, by deciding the arrangement area of each part and separating them independently without crossing each other, it is possible to redesign the influence as much as possible with respect to the change in the specifications of the connector. Manufacturing efficiency can be improved.

Embodiment 3 FIG.
FIG. 7 is a perspective view of the electric power steering apparatus according to Embodiment 3 of the present invention as viewed from above. 8 is a cross-sectional view showing only the connector assembly by cutting the electric power steering apparatus shown in FIG. 7 along the line AA. 7 corresponds to FIG. 6 of the second embodiment described above.

  7 and 8, contact pins 6Aa, 7Aa, 31Aa, and 31Ab of connectors 6A, 7A, and 31A are the same as those of the second embodiment. Therefore, connector assembly 9A and holes 6B, 7B, and 31B are also the same. It is. Here, each of the connectors 6A, 7A, 31A has a shape that can be separated from the connector assembly 9A, and seating surfaces 6C, 7C, 31C are formed at portions that contact the connector assembly 9A.

  As shown in FIGS. 7 and 8, the seat surfaces 6C, 7C, and 31C protrude from the connector main body to the outer peripheral side. Further, as shown in FIG. 8, a concave portion is provided on the upper surface 9Aa of the connector assembly 9A, and the seating surfaces 6C, 7C, 31C are fitted into the concave portion and integrated. At this time, the seating surfaces 6C, 7C, 31C and the upper surface 9Aa of the connector assembly 9A may be brought into close contact with each other using an adhesive.

  Thus, by forming the seating surfaces 6C, 7C, and 31C on the connectors 6A, 7A, and 31A, respectively, the seating surfaces 6C, 7C, and 31C and the concave portion of the upper surface 9Aa of the connector assembly 9A are fitted to form a structure. Even if the specifications of the connectors 6A, 7A, 31A are changed, the seat surfaces 6C, 7C, 31C are not affected, and the parts below the connector assembly 9A may be shared. This can be done by replacing only the connector body that needs to be changed.

  Note that there are cases where some of the terminals and bus bars (not shown in FIG. 7) have to be changed as the specifications of the connectors 6A, 7A, and 31A change. Thus, when the terminals and bus bars are also changed, these terminals and bus bars are formed in close contact with the back side of the upper surface 9Aa of the connector assembly 9A by an outsert mold, thereby forming the connector assembly 9A. Can be made as small as possible. Such a replacement structure is particularly suitable for a small variety of systems.

  Here, it is also conceivable that the connector assembly 9A has a configuration in which the second embodiment and the third embodiment described above are fused. Specifically, in the second embodiment, holes 6B, 7B, 31B are provided in the vicinity of the contact pins 6Aa, 7Aa, 31Aa, 31Ab on the upper surface 9Aa of the connector assembly 9A. A concave portion was provided on the upper surface 9Aa of the attachment 9A. Therefore, it is considered that a hole larger than the connector itself is provided on the upper surface 9Aa of the connector assembly 9A.

  FIG. 9 is another cross-sectional view showing only the connector assembly by cutting the electric power steering apparatus shown in FIG. 7 along the line AA. In FIG. 9, the upper surface 9Aa of the connector assembly 9A is provided with a hole larger than the connector itself.

  Because of this hole, a connector with a small number of contact pins can be inserted into this hole, so that it is possible to cope with changes in the specifications of the connector. Further, since the seating surfaces 6C, 7C and 31C are formed on the respective connectors 6A, 7A and 31A, the connectors are inserted from the back side of the connector assembly 9A, and holes are formed in the seating surfaces 6C, 7C and 31C. By blocking, it is possible to cope with a change in the specifications of the connector.

  Therefore, with the above configuration, in order to minimize the influence on the connector specification change, the arrangement area of each part is separated and independent, so that it does not intersect with other areas, The parts can be shared, and the redesigned part by changing the connector specifications can be reduced as much as possible.

Embodiment 4 FIG.
In the fourth embodiment of the present invention, a method for dealing with a change in the specification of a connector during actual manufacturing will be described. First, the connector assembly is often manufactured by resin molding in consideration of the complexity of its shape, insulation, waterproofness, and the like. Specifically, as shown in FIGS. 2, 5, 8, and 9, a connector having a complicated shape is arranged on the upper surface of the connector assembly. Therefore, a mold for molding the connector assembly is composed of a number of parts.

  For this reason, the entire connector assembly cannot be taken out of the mold in the desired shape by simply moving the two mold parts on the top, bottom, left and right. Therefore, it is necessary to use a plurality of molds in manufacturing the connector assembly. Therefore, the configuration of a plurality of molds is divided into a large mold (large mold) that forms the entire outer shape and a relatively small mold (small mold) that surrounds only the connector. By combining the molds, a mold configuration that completes the connector assembly can be obtained.

  As described above, by dividing each connector into small dies, it is possible to deal with a connector having a relatively large specification change, which is efficient in design and manufacturing. Further, since the connector itself, the retaining mechanism, the contact pin insertion, and the like are complicated, the divided part is easier to manufacture when manufacturing the mold. Desirably, it is good to set it as the metal mold | die structure which manufactures a metal mold | die by making it each isolate | separate in a connector periphery and component mounting part, and unites these.

  In addition, considering the type and size of connectors that can be considered at present, it is assumed that the connector having the largest outer shape is mounted, and that each die is manufactured by dividing it into areas larger than this outer shape. It is done. Thereby, since it can respond to the connector of the largest external shape, it can fully respond to the connector of the external shape smaller than that. Moreover, since the area | region between each connector and a component mounting part is divided | segmented, this space can be used as the mating surface of each metal mold | die.

  Therefore, the mold for molding the connector assembly is divided, and the mold configuration is to combine multiple dies, so only the relatively small mold around the connector is changed in response to changes in the connector specifications. In addition, since it is possible to cope with the problem by replacement, it is possible to easily deal with design and manufacturing.

Claims (5)

An electric power steering device comprising a control unit having a control board for controlling the driving of a motor and the motor,
The control unit is integrated with the motor coaxially with the motor output shaft of the motor, and is disposed on the opposite side to the output side of the motor, and is opposite to the output side of the motor in the control unit. Provided with a connector assembly provided on the side,
The connector assembly is on the end surface opposite to the output side of the motor.
A connector for a large current of a power supply system arranged in the same direction as the motor output shaft;
A small current connector of a signal system arranged in the same direction as the motor output shaft;
A component mounting portion including at least one of a capacitor and a coil,
The large current connector, the small current connector and the component mounting portion are arranged separately for each region,
A first extension terminal for electrically connecting the large current connector and the component mounting part;
A second extension terminal further extending from the component of the component mounting portion;
A third extension terminal extending from the small current connector;
The first extension terminal, the second extension terminal, and the third extension terminal are separately disposed,
The first extension terminal, the second extension terminal, and the third extension terminal are formed on the back side of the upper surface of the connector assembly,
The large current connector, the small current connector, the component mounting portion, the first extension terminal, the second extension terminal, and the third extension terminal are arranged separately for each region,
The connector assembly is provided with a window, and at least the third extension terminal is disposed in the window and is connected to a terminal extending from the control board in the window. apparatus. A first connection portion for electrically connecting the second extension terminal and the inside of the control unit;
A second connecting part for electrically connecting the third extension terminal and the inside of the control unit;
The said 1st connection part and the said 2nd connection part, and the said 1st extension terminal, the said 2nd extension terminal, and the said 3rd extension terminal are each arrange | positioned separately on a plane. Electric power steering device. The electric power steering apparatus according to claim 2, wherein the first connection part and the second connection part are arranged in a peripheral part of an end surface of the connector assembly opposite to the output side of the motor. The said large current connector is divided | segmented in the said 2nd extension terminal or the said 1st connection part, when dividing | distributing electric power distribution to several places with respect to the components incorporated in the said control unit. Electric power steering device. The large current connector and the small current connector have a seating surface that protrudes from the connector to the outer peripheral side,
The connector assembly has a recess for inserting the seat surface and a hole for penetrating the contact pin of the connector, or a hole for inserting the main body excluding the connector seat surface,
The electric power steering apparatus according to claim 2, wherein an end face of the connector assembly that is opposite to the output side of the motor and the seat face are in close contact with each other.

Images