JP6053129B2 - Driving device for electric power steering - Google Patents

Description

  The present invention relates to an electric power steering drive device used as a drive source of an electric power steering device, and more particularly to an electric power steering drive device in which an electric motor and a control device for the electric motor are integrally arranged.

  Conventionally, as a drive source of an electric power steering device, as described in Patent Document 1, an electric motor, a control device for the electric motor, and a deceleration for reducing the rotational output of the electric motor and transmitting it to the steering column A drive device in which a mechanism and the like are integrally assembled is known. In such a drive device, the worm shaft of the worm gear is integrally connected to the output shaft of the electric motor, and meshes with the worm wheel of the speed reduction mechanism disposed in the gear box. A sensor coil of a torque sensor is incorporated into the gear box from the opening on the worm wheel mounting side. A motor control device is attached to the side of the gear box opposite to the worm wheel mounting side. From the sensor coil, a signal line is drawn out to the control device side through the gear box, and the signal line is electrically connected to a control board or the like of the control device. A cover is attached to the opening on the worm wheel mounting side and the control device from each side.

JP 2007-276740 A JP 2003-95117 A JP 2008-37131 A

  However, in such a drive device, the direction in which the sensor coil of the torque sensor is assembled is different from the direction in which the control device is assembled. Therefore, the assemblability is poor, and there is a problem that a through hole for drawing a signal line is required in the gear box. It was. In this case, since the gear box is usually formed of a metal such as aluminum die casting, a member or a device for ensuring insulation between the signal line is required for the through hole for drawing the signal line. There was also a problem of becoming. Furthermore, since the sensor coil is disposed behind the worm wheel in the gear box, the sensor coil cannot be assembled after the worm wheel is assembled. For this reason, the assembly of electrical components such as a torque sensor and a control device cannot be performed as a series of operations, which has been a problem in modularizing electrical components such as control elements.

  An object of the present invention is to arrange electrical-related parts so that they can be assembled from the same direction, to improve the assemblability of the drive unit for electric power steering, and to modularize the electrical parts such as control elements, thereby reducing the size of the apparatus. It is in.

The drive device for electric power steering according to the present invention detects a steering torque of a steering shaft built in the drive source, a housing attached to the drive source, and a signal corresponding to the detected torque value as a sensor signal. A drive device for electric power steering, comprising: a torque sensor having a sensor coil that outputs from a terminal; and a control device that is housed in the housing and controls the drive source based on a signal from the torque sensor, wherein the housing The sensor coil is housed at one end of the housing so as to house the sensor coil, and has a sensor coil housing part having an insertion hole through which the steering shaft can be inserted at the bottom thereof, and is disposed adjacent to the sensor coil housing part, The same direction as the opening direction of the sensor coil storage portion is used to store the control device. And a control device accommodating unit which opens in the direction, anda cutout communicating portion for communicating the said control device accommodating unit sensor coil receiving portion, the control device includes a terminal module in which a plurality of terminals are disposed A drive system control device disposed on the lower surface side of the terminal module and disposed on the bottom of the control device housing portion of the housing; and a terminal disposed on the upper surface side of the terminal module and through which the sensor signal terminal is inserted. A control system board having a hole, and the control device and the sensor coil face the opening side of the housing and are respectively disposed in the control device storage portion and the sensor coil storage portion, and the sensor signal terminal Is electrically connected to the control system board while being held in the terminal hole .

In the electric power steering drive device, the drive system control device is placed on the control device storage portion of the housing, and heat generated from the drive system control device is radiated through the housing functioning as a heat sink. Anyway .

The terminal module may be provided with a signal line guide portion through which the sensor signal terminal is inserted, and the sensor signal terminal may be held in the terminal hole in a state of being inserted into the signal line guide portion, The sensor signal terminal may be connected and fixed to the control system board in a state of penetrating the terminal hole.

Further, the housing is provided with a drive source terminal arrangement portion in which a drive source connection terminal for electrically connecting the drive source and the control device is arranged, and the drive source connection terminal is provided in the opening of the housing. You may arrange | position in the said drive source terminal arrangement | positioning part facing the side.

The sensor coil and the drive source connection terminal are attached in a state where the drive system control device is housed in the housing, and the sensor signal terminal of the sensor coil is disposed above the drive system control device. In addition to being electrically connected to the system board, the drive source connection terminal may be electrically connected to the drive system control device.

The sensor signal terminal may be disposed facing the notch communication portion, and the tip of the sensor signal terminal may protrude from the opening side of the housing.

The terminal module includes a coupler for electrically connecting the control device and the outside, a bus bar electrically connected to the coupler, a terminal provided on the bus bar, and a lower side of the terminal module. An opening through which a terminal extending upward from the disposed drive system control device is inserted, and the terminal of the drive system control device is inserted through the opening, You may make it electrically connect with the said terminal provided in the said bus-bar.

Further, another drive device for electric power steering according to the present invention detects a steering torque of a drive source, a housing attached to the drive source, and a steering shaft, and outputs a signal corresponding to the detected torque value from a sensor signal terminal. An electric power steering drive device comprising: a torque sensor having a sensor coil for output; and a control device for controlling the drive source in accordance with a signal from the torque sensor, wherein the housing houses the sensor coil. The housing is opened at one end side and has a sensor coil storage portion having an insertion hole through which the steering shaft can be inserted at the bottom thereof, and is disposed adjacent to the sensor coil storage portion so as to store the control device. A control device storage portion opened in the same direction as an opening direction of the sensor coil storage portion; A case having a notch communicating portion that communicates the device housing portion and the sensor coil housing portion, and the control device is disposed on a lower surface side of the terminal module in which a plurality of terminals are disposed. A drive system control device disposed at the bottom of the control device housing portion of the case, and a control system substrate disposed on the upper surface side of the terminal module and having a terminal hole through which the sensor signal terminal is inserted. And the said control apparatus and the said sensor coil face the opening side of the said case, and are each arrange | positioned at the said control apparatus accommodating part and the said sensor coil accommodating part, The said sensor signal terminal is the state hold | maintained at the said terminal hole And is electrically connected to the control system board.

In the electric power steering drive device, the drive system control device is placed on the control device storage portion of the housing, and heat generated from the drive system control device is radiated through the housing functioning as a heat sink. Anyway .

  According to the drive device for electric power steering of the present invention, the sensor coil of the torque sensor, the control device, and the electric parts such as the drive source connection terminal can be assembled from the opening direction of the housing or the case. From the same direction, it is possible to assemble the sensor coil and the control device that are respectively attached from the same. For this reason, it is easy to assemble compared with the conventional apparatus, and it becomes possible to improve workability. In addition, modularization of electrical components is facilitated, the control device is made compact, and the device can be miniaturized.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an overall configuration of a drive device for electric power steering that is Embodiment 1 of the present invention. It is a disassembled perspective view which shows the structure of the control unit in the drive device for electric power steering of FIG. It is explanatory drawing which showed the state which removed the control apparatus cover of the control unit from the drive device for electric power steering of FIG. It is a perspective view which shows the whole structure of the drive device for electric power steering which is Embodiment 2 of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing the overall configuration of an electric power steering drive apparatus according to Embodiment 1 of the present invention. The apparatus of FIG. 1 is used, for example, as a power source for a column assist type EPS and applies an operation assisting force to a steering shaft of an automobile. An electric power steering drive device (hereinafter abbreviated as EPS drive device) 1 according to the present invention includes an electric motor 2, a gear box 3 incorporating a worm reduction mechanism, and a control unit (ECU: control device) 4. It has a mechanical and electric integrated structure. The EPS driving device 1 is attached to a steering mechanism, and a rotational output from a rotating shaft (not shown) of the electric motor 2 is decelerated by the gear box 3 and transmitted to the steering shaft 5.

  A brushless motor is used for the electric motor 2, and a bracket 6 b is attached to the opening side of the motor case 6 a of the electric motor 2, and these constitute a drive source. The bracket 6 b of the electric motor 2 is attached to the housing 13 of the gear box 3. The rotating shaft of the electric motor 2 extends to the gear box 3 side, and a worm shaft 11 having a worm gear 12 is connected to the rotating shaft so as to rotate integrally with the rotating shaft. The worm 12 is disposed in a worm shaft housing portion 13 a formed in a gear housing (housing) 13. Further, both end sides of the worm shaft 11 are pivotally supported in the worm shaft housing portion 13a by a pair of bearings (not shown). Here, the rotating shaft and the worm shaft 11 are separated, but the rotating shaft may be rotated by a rotating shaft integrally formed with the worm.

  The gear housing 13 is further provided with a worm wheel accommodating portion 13b. A worm 12 is disposed in the worm wheel housing portion 13 b, and the worm 12 meshes with the worm wheel 14. The worm wheel 14 is fixed to the steering shaft 5 to which the steering wheel is attached. In the housing 13, a sensor coil 15 of a torque sensor that detects a load applied to the steering shaft 5 and a control unit 4 that controls driving of the electric motor 2 are also housed.

  FIG. 2 is an exploded perspective view showing the configuration of the control unit 4, and FIG. 3 is an explanatory view showing a state where the cover (control device cover) 16 of the control unit 4 is removed from the EPS driving device 1. As shown in FIG. 2, the housing 13 is open at one end side (upper surface side in FIG. 2), and includes a sensor coil housing portion 21 of the torque sensor, a control device housing portion 22, and a terminal block arrangement portion ( A drive source terminal arrangement portion) 23 is provided. Both the sensor coil housing portion 21 and the control device housing portion 22 are provided so as to open the same surface side of the housing 13. The torque sensor housing portion 21 is disposed adjacent to the control device housing portion 22, and a notch communication portion 24 is provided between the control device housing portion 22 and the signal line connection.

  An insertion hole 25 through which the steering shaft 5 can be inserted is provided at the bottom of the sensor coil housing portion 21. And the coil module of the sensor coil 15 is attached inside the sensor coil accommodating part 21. The sensor coil 15 has a sensor signal terminal (signal line connection portion) 26 that outputs a signal corresponding to the detected torque value. The sensor signal terminal 26 is disposed facing the notch communication portion 24, and is a signal terminal. The tip of 26 (signal line connecting portion) protrudes in the opening direction. A shaft cover 27 is attached on the sensor coil 15 (see FIG. 1).

  The control device housing portion 22 has a planar shape, and an element housing portion 28 capable of housing a relatively large volume electronic component such as the capacitor C1 or the choke coil C2 is provided in a part of the control device housing portion 22. The control device storage unit 22 includes a FET module (drive system control device) 31, a bus bar module (terminal module) 32, a control system substrate 33, and the like that controls the electric motor 2 based on the detection signal of the sensor coil 15. Is attached. In addition, a terminal block arrangement portion 23 is disposed adjacent to the electric motor 2 side of the control device housing portion 22, and the terminal block arrangement portion 23 has a motor terminal electrically connected to the electric motor 2 side. A stand (drive source connection terminal) 34 is attached.

  The FET module 31 includes a metal base substrate (for example, copper) 41 and a synthetic resin mold part 42. On the metal base substrate 41, power electronic components (not shown) such as FETs and semiconductor relays are mounted in a bare chip. The mold part 42 is formed so as to cover the electronic component, and terminals 43 a to 43 d protrude from the upper surface of the mold part 42. In the EPS drive device 1 of the present invention, elements such as FETs are mounted in a bare chip and related parts are in a modular state, so that the part where the elements are mounted is reduced in size and is easy to assemble.

  The heat dissipation grease is applied on the control device storage portion 22, and the FET module 31 is placed on the control device storage portion 22 via the heat dissipation grease. Heat generated by the FET or the like mounted on the FET module 31 is radiated from the metal base substrate 41 to the housing 13 via the heat radiation grease. The housing 13 is formed by aluminum die casting having a high thermal conductivity. In the EPS driving apparatus 1, the housing 13 also functions as a heat sink.

  On the FET module 31, a bus bar module 32 in which electrical elements such as a capacitor C1 and a choke coil C2 are arranged is attached. In a state where the bus bar module 32 is attached to the control device housing portion 22, electronic components having a relatively large volume such as the capacitor C <b> 1 and the choke coil C <b> 2 are arranged in the element housing portion 28 of the housing 13. . The bus bar module 32 has a structure in which a plurality of metal bus bars (conductive plates) 45 are insert-molded in a casing portion 44 made of synthetic resin. One end of each bus bar 45 is disposed in the coupler 46 and serves as a terminal 47. The bus bar module 32 is formed with an opening 48 through which the terminals 43a and 43d on the FET module 31 are inserted, and a plurality of signal line insertion holes through which the terminals 43b and 43c and the sensor signal terminal 26 are inserted. Signal line guide portions 49a to 49c are formed. The terminal 43d penetrates through the opening 48 of the bus bar module 32 and is electrically welded to the terminal 51 provided on the bus bar 45.

  A control system board 33 is attached on the bus bar module 32. The control system board 33 is provided with a plurality of terminal holes (through holes) 52 that are electrically connected in a state where the sensor signal terminals 26 and the terminals 43b and 43c are penetrated. On the control system substrate 33, an aluminum cover 16 is attached by screws 61. A motor terminal block 34 is attached to the right side of the bus bar module 32 in FIG. The motor terminal block 34 is provided with a signal line terminal 54 connected to a motor sensor plate 53 and a rotation sensor (not shown) arranged inside the electric motor 2. The motor terminal plate 53 is abutted against the terminal 43a of the FET module 31, and is resistance welded. The signal line terminal 54 is electrically connected by solder or the like while penetrating the terminal hole 52 of the control system substrate 33. The motor terminal plate 53 and the signal line terminal 54 are respectively electrically connected to a motor side terminal (not shown) provided on one end side of the electric motor 2 and extending in the axial direction. A terminal cover 55 is mounted on the motor terminal block 34.

  Such an EPS driving device 1 is assembled as follows. First, heat dissipation grease is applied to the control device housing portion 22 of the housing 13, and the FET module 31 is placed thereon. Next, the coil module of the sensor coil 15 is attached to the sensor coil housing portion 21 of the housing 13. The coil module is fixed to the housing 13 by screws 62. Then, the motor terminal block 34 is attached to the terminal block disposition portion 23 with screws 63 so that each motor terminal plate 53 of the motor terminal block 34 faces each terminal 43a of the FET module 31, and each motor terminal The board 53 and each terminal 43a are electrically connected. After the motor terminal block 34 is attached, the bus bar module 32 is placed on the FET module 31. In addition, the assembly order of the sensor coil 15 and the motor terminal block 34 may be reversed.

  When the bus bar module 32 is placed on the FET module 31, the sensor signal terminal 26 and the terminals 43 b and 43 c of the sensor coil 15 are guided by the signal line guide portions 49 b to 49 d of the bus bar module 32 and on the FET module 31. The terminals 43 a and 43 d are inserted through the opening 48. Each terminal 43d passes through the opening 48 of the bus bar module 31 and faces the terminal 51 on each bus bar 45 on the surface, and is welded and electrically connected in this state. The bus bar module 32 is fixed to the housing 13 together with the FET module 31 by screws 64.

  The motor terminal plate 53 of the motor terminal block 34 is electrically welded to the terminal 43 a of the FET module 31. At that time, the welded portion is positioned at the notch 49 of the bus bar module 32. Thereafter, the control system board 33 is mounted on the bus bar module 32 by screws 65 and guided by the signal line guide portions 49 b to 49 d of the bus bar module 32, and the FET signal module 31 of the sensor coil 15. The upper terminals 43b and 43c and the signal line terminal 54 of the motor terminal block 34 are electrically connected by solder or the like while penetrating each terminal hole 52 on the control system substrate 33. The signal line terminals 54 of the motor terminal block 34 are guided by the signal line guide portions 49 a having the signal line insertion holes of the bus bar module 32 and are electrically connected to the corresponding terminal holes 52. At that time, in the EPS driving apparatus 1, after fixing each module and board, the terminals are soldered or welded at that position to be connected and fixed. Can absorb backlash. After connecting each terminal, the cover 16 is attached on the control system board 33 by the screw 61, and the control device such as the control system board 33 is covered. Thus, the assembly of the control unit 4 portion is completed.

  After assembling the control unit 4 portion, the electric motor 2 is attached. A plurality of terminals (not shown) on the electric motor 2 side are aligned with the motor terminal block 34 and electrically connected to the other end of the motor terminal plate 53 by fixing means such as screws (not shown). Then, a terminal cover 55 is attached on the motor terminal block 34. Further, the steering shaft 5 and the worm wheel 14 are assembled from the side opposite to the control unit 4 (the surface in the direction of arrow X in FIG. 1). Then, a gear housing cover (not shown) is attached to the opposite surface side to complete the entire assembly.

  As described above, the EPS drive device 1 of the present invention can assemble all of the sensor coil of the torque sensor and the electric parts such as the control device, which are conventionally attached from the opposite side, from the same direction. In other words, it is possible to perform assembly of electrical-related parts from one direction as a series of operations. For this reason, it is easy to assemble compared with the conventional apparatus, and it becomes possible to improve workability. In addition, modularization of electrical components is facilitated, the control device is made compact, and the device can be miniaturized.

  Furthermore, since it is not necessary to provide a special through hole for the signal line of the sensor coil of the torque sensor in the gear housing, the housing structure is simplified, and it is not necessary to provide a special insulating member or the like in the opening portion. Product cost can be reduced. In addition, the mechanical and electrical integration makes it easy for the system manufacturer to manufacture the entire EPS drive device, and the assembly process and the man-hours for managing parts can be reduced.

  On the other hand, as a conventional general control device, there is also a configuration in which a drive system and a control system element are integrated (modularized) in advance and mounted at a stretch. However, in such an apparatus, there are many structures in which the control board is arranged in the back of the case. In that case, the board must be assembled in a state where the back of the case is not visible, and there is a possibility that the installation position of the board may be shifted. is there. For this reason, in a conventional apparatus, a method in which a heat dissipation sheet is interposed between the substrate and the case is often used in order to absorb such misalignment. However, in this structure, since the heat radiation sheet has a certain thickness, it is inevitable that the heat radiation efficiency is lowered and the cost is increased by the heat radiation sheet. In addition, regarding the case for storing such a module product, if the above-described positional deviation is taken into consideration, the size of the device itself is hindered. In this regard, the present invention adopts a structure in which heat dissipation efficiency is prioritized and control system elements such as FETs are modularized, while power system elements are arranged in a bus bar module and stacked. For this reason, each module can be mounted in accordance with the positional relationship, and it becomes possible to adopt heat radiation grease instead of the heat radiation sheet, and it becomes possible to improve heat radiation and reduce costs. Further, since errors can be absorbed when components are stacked, the apparatus can be downsized.

  Next, a second embodiment of the present invention will be described in detail based on the drawings. FIG. 4 is a perspective view showing an overall configuration of an electric power steering drive apparatus according to Embodiment 2 of the present invention. The description of the same parts and the same components as those in the first embodiment will be omitted.

  Also in the present embodiment, the bracket 6 a is attached to the opening side of the motor case 6 a of the electric motor 2, and the bracket 6 a is attached to the gear housing 71 of the gear box 3. The gear housing 71 is provided with a worm shaft housing portion 71a and a worm wheel housing portion 71b. And the above-mentioned Embodiment 1 apparatus is the point which is not provided with the sensor coil accommodating part, the control apparatus accommodating part, and the terminal block arrangement | positioning part in the one end side (upper surface side in FIG. 4) of the gear housing 71, That is, the difference is that the gear housing 71 has only a function as a gear box.

  In the present embodiment, the control device 4, the sensor coil 15, and the motor terminal block 34 are accommodated in a control unit case (case) 72 provided separately from the gear housing 71. Similar to the housing 3 of the first embodiment, the control unit case 72 is open at one end side (the upper surface side in FIG. 4), and is provided with a sensor coil housing portion, a control device housing portion, and a terminal block. Part (drive source terminal arrangement part) is provided. Both the sensor coil housing portion and the control device housing portion are provided so as to open the same surface side of the control unit case 72. The sensor coil housing portion is disposed adjacent to the control device housing portion, and a notch communication portion is provided between the control coil housing portion 22 and the control device housing portion 22 for signal line connection.

  Also in the apparatus of the second embodiment, each component is attached to the control unit case 72 in the same order as in the previous embodiment, and the assembly of the control unit 4 portion is completed. Then, after assembling the control unit 4 portion, the control unit 4 is combined with the housing 71 that has been separately assembled, thereby completing the entire assembly.

  As described above, the EPS drive device 1 of the present invention can assemble all of the sensor coil of the torque sensor and the electric parts such as the control device, which are conventionally attached from the opposite side, from the same direction. In other words, it is possible to perform assembly of electrical-related parts from one direction as a series of operations. For this reason, it is easy to assemble compared with the conventional apparatus, and it becomes possible to improve workability. In addition, modularization of electrical components is facilitated, the control device is made compact, and the device can be miniaturized. Furthermore, in the second embodiment, the gear housing 71 can be shared without separately creating a gear housing according to the specifications of the EPS drive device 1 as to whether the control device is integral or separate. For this reason, it is possible to reduce the cost without preparing a plurality of parts.

It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.
For example, in the above-described embodiment, the configuration using the FET module 31 in which the elements such as FETs are modularized is shown. However, the elements such as FETs are not necessarily modularized, and various elements are arranged on a normal substrate. May be adopted. However, it is preferable to modularize the apparatus in terms of downsizing the apparatus and improving assemblability.

DESCRIPTION OF SYMBOLS 1 Electric power steering drive device 2 Electric motor 3 Gear box 4 Control unit (control device)
5 Steering shaft 6a Motor case 6b Bracket 11 Worm shaft 12 Worm gear 13 Gear housing (housing)
13a Worm shaft accommodating portion 13b Worm wheel accommodating portion 14 Worm wheel 15 Sensor coil 16 Cover (control device cover)
21 Sensor coil housing portion 22 Control device housing portion 23 Terminal block placement portion (drive source terminal placement portion)
24 Notch communication part 25 Insertion hole 26 Sensor signal terminal (signal line connection part)
27 Shaft cover 28 Element housing 31 FET module (drive system controller)
32 Busbar module (terminal module)
33 Control system board 34 Motor terminal block (drive source connection terminal)
41 Metal base substrate 42 Mold part 43a-43d Terminal 44 Case part 45 Bus bar 46 Coupler 47 Terminal 48 Opening part 49a-49c Signal line guide part 51 Terminal 52 Terminal hole 53 Motor terminal board 54 Signal line terminal 55 Terminal covers 61-65 Screw 71 Gear housing 71a Worm shaft accommodating portion 71b Worm wheel accommodating portion 72 Case for control unit (case)
C1 Capacitor C2 Choke coil

Claims (10)

A drive source, a housing attached to the drive source, a torque sensor having a sensor coil which is built in the housing and detects a steering torque of a steering shaft and outputs a signal corresponding to the detected torque value from a sensor signal terminal ; A drive device for electric power steering, comprising a control device housed in the housing and controlling the drive source according to a signal of the torque sensor,
The housing is
A sensor coil storage part having an insertion hole into which the one end side of the housing is opened so as to store the sensor coil and into which the steering shaft can be inserted;
A control device storage portion disposed adjacent to the sensor coil storage portion and opened in the same direction as the opening direction of the sensor coil storage portion so as to store the control device;
A notch communication portion for communicating the control device storage portion and the sensor coil storage portion;
The controller is
A terminal module having a plurality of terminals;
A drive system control device disposed on the lower surface side of the terminal module and disposed at the bottom of the control device storage portion of the housing;
A control system board disposed on the upper surface side of the terminal module and having a terminal hole through which the sensor signal terminal is inserted;
The control device and the sensor coil are arranged in the control device storage portion and the sensor coil storage portion, respectively, facing the opening side of the housing,
The drive device for electric power steering , wherein the sensor signal terminal is electrically connected to the control system board while being held in the terminal hole . In the electric power steering drive device according to claim 1,
The drive system control device is mounted on the control device storage portion of the housing, and heat generated from the drive system control device is radiated through the housing functioning as a heat sink. Power steering drive. In the drive device for electric power steering according to claim 1 or 2,
The terminal module has a signal line guide portion through which the sensor signal terminal is inserted,
The drive device for electric power steering , wherein the sensor signal terminal is held in the terminal hole while being inserted into the signal line guide portion . In the drive device for electric power steering according to any one of claims 1 to 3,
The drive device for electric power steering , wherein the sensor signal terminal is connected and fixed to the control system board in a state of passing through the terminal hole . In the electric power steering drive device according to any one of claims 1 to 4,
The housing further includes a drive source terminal arrangement part in which a drive source connection terminal for electrically connecting the drive source and the control device is arranged,
The drive unit for electric power steering, wherein the drive source connection terminal faces the opening side of the housing and is disposed in the drive source terminal disposition portion . In the drive device for electric power steering according to claim 5,
The sensor coil and the drive source connection terminal are attached in a state where the drive system control device is housed in the housing,
The sensor signal terminal of the sensor coil is electrically connected to the control system board disposed above the drive system control device,
The drive unit for electric power steering, wherein the drive source connection terminal is electrically connected to the drive system control device. In the drive device for electric power steering according to any one of claims 1 to 6,
The drive device for electric power steering , wherein the sensor signal terminal is disposed so as to face the notch communication portion, and a tip of the sensor signal terminal protrudes toward an opening side of the housing . In the drive device for electric power steering according to any one of claims 1 to 7,
The terminal module is
A coupler for electrically connecting the control device and the outside;
A bus bar electrically connected to the coupler;
Terminals provided on the bus bar;
An opening through which a terminal extending upward from the drive system control device disposed on the lower side of the terminal module is inserted;
The electric power steering drive device , wherein the terminal of the drive system control device is electrically connected to the terminal provided on the bus bar in a state of being inserted into the opening . A torque sensor having a drive source, a housing attached to the drive source, a sensor coil for detecting a steering torque of the steering shaft, and outputting a signal corresponding to the detected torque value from a sensor signal terminal; and a signal of the torque sensor A drive device for electric power steering comprising a control device for controlling the drive source by
The housing is
A sensor coil storage part having an insertion hole into which the one end side of the housing is opened so as to store the sensor coil and into which the steering shaft can be inserted;
A control device storage portion disposed adjacent to the sensor coil storage portion and opened in the same direction as the opening direction of the sensor coil storage portion so as to store the control device;
Comprising a case having a a cutout communicating portion for communicating the sensor coil receiving portion and the control device accommodating unit,
The controller is
A terminal module having a plurality of terminals;
A drive system control device disposed on the lower surface side of the terminal module and disposed at the bottom of the control device storage portion of the case;
A control system board disposed on the upper surface side of the terminal module and having a terminal hole through which the sensor signal terminal is inserted;
The control device and the sensor coil face the opening side of the case, and are respectively disposed in the control device storage portion and the sensor coil storage portion.
The drive device for electric power steering , wherein the sensor signal terminal is electrically connected to the control system board while being held in the terminal hole . In the drive device for electric power steering according to claim 9,
The drive system control device is mounted on the control device storage portion of the housing, and heat generated from the drive system control device is radiated through the housing functioning as a heat sink. Power steering drive.

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