JP5213590B2 - Electric motor - Google Patents

Description

  The present invention relates to an electromechanically integrated electric motor in which a control board is provided in a gear case that houses a speed reduction mechanism, and is particularly effective when applied to a motor equipped with a rotation sensor that detects rotation of an amateur shaft.

  2. Description of the Related Art Conventionally, as a drive source for vehicle electrical components such as a sunroof device, an electromechanically integrated electric motor is used which houses a control board in a gear case that houses a speed reduction mechanism as a single unit. In such an electro-mechanical integrated electric motor, the control board is fixed to the gear case by screws (fixing means), or is fixed to the inner surface of the cover body that closes the gear case by screws (fixing means), and this cover body is fixed to the gear case. By attaching to the control board, the control board is accommodated in the control board accommodating part in the gear case.

  On the other hand, as such an electric motor, there is one in which a rotation sensor for detecting the rotation of the amateur shaft is provided and the operation of the motor is controlled based on a detection signal detected by the rotation sensor. In this case, a sensor magnet (rotation information output means) is fixed to a portion of the armature shaft protruding into the gear case, and a pair of Hall ICs (detectors) are provided on the control board so as to face the sensor magnet. When the sensor magnet rotates together with the amateur shaft, a pulse signal is output as a detection signal from each Hall IC, the control board recognizes the rotation of the amateur shaft based on the pulse signal, and the pulse signal from each Hall IC. The direction of rotation of the amateur shaft is recognized based on the appearance timing of.

  In order to increase the detection accuracy of the rotation sensor using such a Hall IC, it is necessary to position each Hall IC with high accuracy with respect to the sensor magnet.

Therefore, for example, in the electric motor disclosed in Patent Document 1, a protrusion (columnar) positioning portion is provided on the cover body, and this positioning portion is inserted into a through hole (positioned portion) formed in the control board and controlled. The outer periphery of the substrate is brought into contact with the inner surface of the edge of the cover body, and in this state, the control board is fixed to the cover body with a screw or the like, thereby positioning the control board.
JP 2003-47204 A

  However, even if a positioning structure as shown in Patent Document 1 is provided, the control board may be fixed to the cover body with a slight displacement. Then, the positional deviation is caused by the control board being displaced in the rotation direction around the positioning portion. When the distance between each Hall IC and the sensor magnet is different, the relative deviation amount due to this deviation is different. As a result, the rotation detection accuracy by the rotation sensor may be greatly reduced.

  An object of the present invention is to make the relative displacement amount of each detection body with respect to the rotation information output means uniform so as to improve the rotation detection accuracy by the detection body.

The electric motor of the present invention includes a yoke formed in a bottomed cylindrical shape, a gear case fixed to the open end of the yoke, a cover body attached to the gear case and closing the gear case, and protruding into the gear case. An armature that is rotatably supported by the yoke, a speed reduction mechanism that is housed in the gear case and decelerates rotation of the armature shaft and outputs it from an output shaft, and a drive current supplied to the armature. A control circuit having a control circuit for controlling, fixed to the cover body by a fixing means and accommodated in the gear case; a first engagement piece provided in the gear case; and the first engagement piece provided in the cover body and a second engaging piece that engages with the first engagement piece and said second engagement piece is the engaged with the positioning portion provided on the control board As well as positioning the control the substrate relative to said gear case, and a positioning portion that is disposed on the axis of the armature shaft as viewed from a direction perpendicular to the control board is fixed to the armature shaft, the rotation that rotates together with the armature shaft Provided on the control board with the same distance from the axis on both sides of the armature shaft as viewed from the direction perpendicular to the control board and facing the rotation information output means respectively. And a first detector and a second detector for detecting rotation information generated by the rotation information output means.

  In the electric motor of the present invention, the first engagement piece is formed in a protruding shape, the second engagement piece is formed in a cylindrical shape through which the first engagement piece is inserted, and the positioned portion is formed in the first position. It is formed in the shape of a hole through which two engaging pieces are inserted.

The electric motor of the present invention includes a yoke formed in a bottomed cylindrical shape, a gear case fixed to the open end of the yoke, and an armature shaft protruding into the gear case, and is rotatably supported by the yoke. An amateur, a reduction mechanism that is housed in the gear case and decelerates rotation of the armature shaft and outputs it from the output shaft, and a control circuit that controls a drive current supplied to the armature, are fixed to the gear case by a fixing means A control board accommodated in the gear case, and the gear case is provided on an axis of the armature shaft as viewed from a direction perpendicular to the control board, and engages with a positioned portion provided on the control board. a positioning unit for positioning the control board to the gear case is fixed to the armature shaft, times that rotates together with the armature shaft And information output means, with facing to each of the rotational information output means, on both sides of the armature shaft when viewed from a direction perpendicular to the control board, provided on the control board of the distance from said axis as identical to each other And a first detector and a second detector for detecting rotation information generated by the rotation information output means.

The electric motor of the present invention includes a yoke formed in a bottomed cylindrical shape, a gear case fixed to the open end of the yoke, a cover body attached to the gear case and closing the gear case, and protruding into the gear case. An armature that is rotatably supported by the yoke, a speed reduction mechanism that is housed in the gear case and decelerates rotation of the armature shaft and outputs it from an output shaft, and a drive current supplied to the armature. A control circuit having a control circuit that is fixed to the cover body by a fixing means and accommodated in the gear case ; and provided on the cover body on an axis of the amateur shaft as viewed from a direction perpendicular to the control board. is a positioning portion for positioning said control board engaging the portion to be positioned which is provided on the control board with respect to the gear case, Serial fixed to the armature shaft, wherein the rotational information output unit that rotates with the armature shaft, with facing to each of the rotational information output means, on both sides of the armature shaft when viewed from a direction perpendicular to the control board, to each other The first and second detectors are provided on the control board with the same distance from the axis , and each detects rotation information generated by the rotation information output means.

  The electric motor of the present invention is characterized in that the positioning portion is formed in a protruding shape, and the positioned portion is formed in a hole shape through which the positioning portion is inserted.

  In the electric motor of the present invention, an angle formed by a straight line connecting the positioning portion and the first detection body with respect to an axis of the amateur shaft, and a straight line connecting the positioning portion and the second detection body are It arrange | positions so that the angle made with respect to the axis line of an amateur axis | shaft may become the same.

  In the electric motor of the present invention, a power supply device for supplying power to the armature is attached to the open end of the yoke, and the power supply device is provided with a pair of power supply terminals arranged inside the gear case, and the control The substrate is provided with a pair of connection pieces connected to the corresponding power supply terminals so as to be movable in the axial direction of the armature shaft.

  The electric motor of the present invention is characterized in that the pair of power supply terminals are arranged side by side in a direction orthogonal to the armature shaft.

According to the present invention, the first and second detection bodies facing the rotation information output means are located on both sides of the armature shaft when viewed from the direction perpendicular to the control board, and the distance from the axis of the armature shaft is mutually. Since they are provided on the control board so that they are the same, even if the control board is displaced in the rotational direction around the positioning part, the relative displacement of each detector relative to the rotation information output means is made uniform. Thereby, the rotation detection accuracy by the first and second detection bodies can be increased.

  Further, according to the present invention, since the connection piece provided on the control board is connected to the power supply terminal provided on the power supply device so as to be movable in the axial direction of the amateur shaft, the load applied to the control board from the connection portion can be reduced. The direction can be a direction perpendicular to the amateur axis. Thereby, the position shift to the rotation direction centering on the positioning part of the control board by the load from a connection part can be suppressed, and the rotation detection precision by the 1st and 2nd detection body can further be improved.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is an explanatory view showing an outline of a sunroof device provided on a roof of a vehicle. The sunroof device 11 includes a roof panel 12, and an opening formed in a roof 13 a of the vehicle 13 by the roof panel 12. 14 is opened and closed. A pair of shoes 15a and 15b are fixed to both sides of the roof panel 12, while guide rails 16 extending in the vehicle front-rear direction are fixed to both sides of the opening 14 of the roof 13a. , 15b are guided by the corresponding guide rails 16, so that the roof panel 12 can be moved in the vehicle front-rear direction, that is, can be opened and closed.

  One end of geared drive cables 17a, 17b is connected to each shoe 15b on the vehicle rear side, and the other ends of these drive cables 17a, 17b are respectively routed to the vehicle front side of the opening 14. Yes. A sunroof motor 21 as an electric motor is disposed on the front side of the vehicle with respect to the opening 14 and inside the roof 13a between the windshield 13b and the drive cables 17a and 17b are connected to the sunroof motor 21. Is engaged with a drive gear 22 provided in When the sunroof motor 21 is operated, the drive cables 17a and 17b are driven in the axial direction in opposite directions by the sunroof motor 21, whereby the roof panel 12 is automatically opened and closed by being pushed and pulled by the drive cables 17a and 17b. It is like that.

  2A and 2B are perspective views showing details of the sunroof motor shown in FIG. 1, FIG. 3 is an exploded perspective view of the sunroof motor shown in FIG. 2, and FIG. 4 is a plan view showing the arrangement of the brush holder. FIG.

  As shown in FIGS. 2A and 2B, the sunroof motor 21 includes a motor body 23 that is a motor with a brush. The motor body 23 includes a yoke 24 formed in a bottomed cylindrical shape having a substantially oval cross section, and an armature 25 is accommodated in the yoke 24 as shown in FIG. The armature 25 includes an armature shaft 26, and one end of the armature shaft 26 is supported by a bearing (not shown) provided at the bottom of the yoke 24, so that the armature 25 is rotatable inside the yoke 24. Yes. An amateur core 27 is fixed to the amateur shaft 26, and a plurality of amateur coils 28 are wound around the amateur core 27. Further, a commutator 29 is fixed to the armature shaft 26 adjacent to the armature core 27, and the coil ends of each armature coil 28 are connected to the commutator 29, respectively.

  A brush device 31 as a power supply device for supplying power to the armature 25, that is, the amateur coil 28, is attached to the open end of the yoke 24. As shown in FIG. 4, the brush device 31 has a structure in which a pair of brushes 33 a and 33 b are mounted on a brush holder 32. The brushes 33 a and 33 b are in sliding contact with the outer peripheral surface of the commutator 29, and the brush The drive current commutated at a predetermined timing via the 33a, 33b and the commutator 29 is supplied to the amateur coil 28.

  A gear case 36 is fixed to the open end of the yoke 24 by a pair of bolts 34 and nuts 35. The gear case 36 is formed in a bathtub shape from a resin material, and the armature shaft 26 of the motor body 23 protrudes from the yoke 24 to the inside of the gear case 36 and is accommodated in the gear case 36. The distal end portion and the intermediate portion of the armature shaft 26 are supported by a bearing (not shown) provided inside the gear case 36. A cover body 37 is attached to the gear case 36 by five claw engagements, and the open end of the gear case 36 is closed by the cover body 37.

  The brush holder 32 is sandwiched and fixed between the yoke 24 and the gear case 36.

  FIG. 5 is a sectional view taken along line AA in FIG. 2B. As shown in FIG. 5, a worm gear mechanism 41 as a speed reduction mechanism is accommodated in the gear case 36 closed by the cover body 37. ing. The worm gear mechanism 41 includes a worm 41a and a worm wheel 41b. The worm 41a is integrally formed on an outer peripheral surface of a portion of the armature shaft 26 protruding into the gear case 36, and the worm wheel 41b is fixed to the output shaft 42. The output shaft 42 is rotatably accommodated in a cylindrical gear accommodating portion 36a provided inside the gear case 36. The worm 41a and the worm wheel 41b are meshed with each other, whereby the rotation of the armature shaft 26 is decelerated to a predetermined rotational speed via the worm gear mechanism 41 and output from the output shaft 42.

  In the illustrated case, the worm 41a is integrally formed on the outer peripheral surface of the armature shaft 26. However, the present invention is not limited thereto, and the armature shaft 26 is connected to a shaft provided with the worm 41a. Other structures may be used as long as the worm 41a is rotationally driven by the armature shaft 26.

  A gear cover 43 is attached to the open end of the gear housing portion 36a. The gear cover 43 isolates the gear housing portion 36a in a gear case 36 from a control board housing portion 36b described later. Thereby, lubricating oil such as grease applied to the worm gear mechanism 41 is prevented from leaking to a portion other than the gear housing portion 36a of the gear case 36.

  As shown in FIG. 5, the output shaft 42 protrudes from the bottom surface of the gear case 36 to the outside of the case 36 (upward in the figure), and the drive gear 22 is fixed to the tip thereof. Further, a cable guide 36c is provided on the outer side (upward in the drawing) of the bottom surface of the gear case 36, and the cable guide 36c has a mounting hole 36d into which a claw portion 44b of a metal guide plate 44 is inserted. Is provided. The guide plate 44 includes a pair of guide walls 44a facing each other with the drive gear 22 interposed therebetween, and the drive cables 17a and 17b are disposed so as to be sandwiched between the guide walls 44a and the drive gear 22. Yes.

  With such a configuration, when the motor main body 23 is operated, the rotation of the armature shaft 26 is transmitted to the output shaft 42 via the worm gear mechanism 41, and the drive cables 17a and 17b are predetermined by the drive gear 22 rotating together with the output shaft 42. The roof panel 12 automatically opens and closes.

  As shown in FIG. 5, a tool hole 42a that can be engaged with a tool such as a hexagon wrench is formed at the other end (downward in the figure) of the output shaft 42, and the motor main body 23 has failed. In this case, the tool is engaged with the tool hole 42a through the through hole 37a formed in the cover body 37, the output shaft 42 is rotationally driven by the tool, and the roof panel 12 is manually opened and closed. Can be done.

  The sunroof motor 21 is provided with a control board 51 for controlling the operation of the motor body 23. The control board 51 has a structure in which a control circuit 51b for controlling the drive current supplied to the amateur 25 (the amateur coil 28) is provided on the board 51a, and serves as a fixing means provided integrally with the cover body 37. It is fixed to the inner surface of the cover body 37 by three clips 52. These clips 52 are well-known fixing means comprising a columnar main body 52a, a clip ball 52b provided on the upper portion thereof, and a cross slit 52c extending from the clip ball 52b to the main body 52a. Then, by attaching the cover body 37 to the gear case 36, the control board 51 is accommodated in a control board accommodation portion 36 b that is integrally provided inside the gear case 36.

  As shown in FIGS. 3 and 4, the brush device 31 is provided with a pair of power supply terminals 53, 54, and the control board 51 is provided with a pair of connection pieces 55, 56. By connecting 56 to the corresponding power supply terminals 53 and 54, the control board 51 (control circuit 51b) and the brushes 33a and 33b are electrically connected.

  The gear case 36 is provided with a ground terminal (ground terminal) 57 whose one end is electrically connected to the yoke 24 via the bolt 34 and the nut 35, and the control board 51 is provided with a ground connection piece 58. By connecting the connecting piece 58 to the ground terminal 57, the control circuit 51b can be grounded (grounded) to the yoke 24.

  FIG. 6 is a perspective view showing a connection structure between the power supply terminal and the connection piece. The power supply terminals 53 and 54 provided in the brush device 31 are each formed in a plate shape, and the longitudinal direction thereof is the axial direction of the amateur shaft 26. And the thickness direction is orthogonal to the opening direction of the gear case 36 and is arranged inside the gear case 36 in a direction orthogonal to the axial direction of the armature shaft 26, that is, in the width direction of the sunroof motor 21. ing. The ground terminal 57 is also formed by bending a plate material. The terminal portion disposed in the gear case 36 and connected to the connection piece 58 has a longitudinal direction parallel to the axial direction of the armature shaft 26 and has a thickness. The direction is orthogonal to the opening direction of the gear case 36, and the power terminals 53 and 54 are arranged in the direction perpendicular to the axial direction of the armature shaft 26, that is, in the width direction of the sunroof motor 21. Has been.

  On the other hand, as shown for the connection piece 55 in FIG. 6, the connection pieces 55, 56, and 58 provided on the control board 51 are each a clamping part 55a formed in a fork shape and a support part that supports the clamping part 55a. 55b, a connection piece restricting portion 55c that receives stress applied to the holding portion 55a, and a connection portion 55d that is electrically connected to the control circuit 51b by solder or the like. On the other hand, the control board 51 is provided with a dummy hole 51c, and the connection piece restricting portion 55c can be displaced slightly in the dummy hole 51c. Thus, the connection pieces 55, 56, and 58 are connected to each other. The structure can be bent in four directions with respect to the control board 51.

  When the cover body 37 to which the control board 51 is fixed is attached to the gear case 36, as shown in FIG. 6, the corresponding power supply terminal on the gear case 36 side between the clamping portions 55a of the connection pieces 55 provided on the control board 51. 53 is sandwiched, whereby the connection piece 55 and the power supply terminal 53 are electrically connected. Although not shown in detail, the connection pieces 56 and 58 are also connected to the power supply terminal 54 and the ground terminal 57 by the same structure as the connection piece 55.

  At this time, since the power supply terminals 53 and 54 and the ground terminal 57 are arranged in parallel with each other in the axial direction of the armature shaft 26, the connection pieces 55, 56 and 58 are connected to the power supply terminals 53, 54 and the ground terminal 57. Thus, the armature shaft 26 is connected so as to be movable in the axial direction. Thus, even when a load is applied from the power supply terminals 53, 54 or the ground terminal 57 to the connection pieces 55, 56, 58 due to an assembly error or the like during or after the connection work, the direction of the load is the amateur shaft 26. Is the direction orthogonal to the width of the sunroof motor 21. Further, even if a load is applied to the connection pieces 55, 56, 58 from the power supply terminals 53, 54 and the ground terminal 57, the connection pieces 55, 56, 58 can bend in all directions. It is possible to suppress the poor connection to the control circuit 51b and the like.

  A connector 59 for external connection is provided at one end of the control board 51. As shown in FIG. 2, the connector 59 protrudes from the gear case 36, and the control circuit 51b is connected to a power source (not shown) such as a battery mounted on the vehicle 13 via the connector 59 or a sunroof switch (not shown) provided in the vehicle interior. (Not shown). When the sunroof switch is operated, a drive current is supplied from the power source to the control circuit 51b via the connector 59, and this drive current is controlled to a predetermined current by the control circuit 51b, so that the connection pieces 55, 56, 58, the power supply terminals 53 and 54, the brushes 33a and 33b, and the commutator 29 are supplied to the amateur 25 (the amateur coil 28).

  FIG. 7 is a cross-sectional view showing the details of the positioning portion. The sunroof motor 21 is provided with a positioning portion 61 for positioning the control board 51 at a predetermined position in the cover body 37, that is, the gear case 36. As can be seen from FIG. 3, the positioning portion 61 includes a positioning protrusion 62 as a first engaging piece provided on the gear case 36 and a positioning cylindrical portion 63 as a second engaging piece provided on the cover body 37. ing.

  The positioning protrusion 62 is formed in a protrusion shape (columnar shape) having a substantially cross-shaped cross section, and is parallel to the assembly direction of the cover body 37 to the gear case 36 and directed from the gear case 36 toward the cover body 37. Protruding. The positioning cylindrical portion 63 is formed in a cylindrical shape and protrudes from the cover body 37 toward the gear case 36 in parallel to the positioning protrusion 62. The inner diameter of the positioning cylindrical portion 63 is formed to be substantially the same as the outer diameter of the positioning projection 62. When the cover body 37 is attached to the gear case 36, the positioning projection 62 is lightly press-fitted inside the positioning cylindrical portion 63. Thus, the positioning projection 62 and the positioning cylindrical portion 63 are engaged with each other so that the cover body 37 is positioned with respect to the gear case 36. A control board restricting part 63a for positioning the control board 51 is provided on the distal end side of the positioning cylindrical part 63, and a tapered surface 63b is provided on the end part side thereof.

  The positioning protrusion 62 is formed integrally with the gear case 36 on the inner surface of the gear case 36, and the positioning cylindrical portion 63 is formed integrally with the cover body 37 on the inner surface of the cover body 37.

On the other hand, the substrate 51a of the control substrate 51 is provided with a positioning hole 64 corresponding to the positioning portion 61 as a positioned portion formed in a hole shape. The positioning hole 64 is formed in a circular shape having substantially the same diameter as the outer diameter of the control board restricting portion 63 a of the positioning cylindrical portion 63, and the control board 51 is positioned on the cover body 37 by inserting the positioning cylindrical portion 63. It is supposed to be. The connector base 59 a of the connector 59 provided on the control board 51 is guided by the guide wall 37 b of the cover body 37. In other words, when fixing the control board 51 to the cover body 37, first, as the outer periphery of the control board 51 is disposed at the edge inside the cover member 37, and along the connector base 59 a of the connector 59 to the guide wall 37b Then, the positioning cylindrical portion 63, that is, the positioning portion 61 is inserted into the positioning hole 64 to position the control board 51 at a predetermined position of the cover body 37, and the control board 51 is fixed to the cover body 37 by each clip 52. Then, by attaching the cover body 37 to which the control board 51 is fixed to the gear case 36 so that the positioning projection 62 and the positioning cylindrical part 63 engage with each other, the control board 51 is attached to the control board housing part 36b of the gear case 36. It can be accurately arranged at a predetermined position.

  The tapered surface 63 b provided at the tip of the positioning cylindrical portion 63 functions as a guide when the positioning cylindrical portion 63 is inserted into the positioning hole 64 of the control board 51.

  In order to detect the rotation of the amateur shaft 26, the sunroof motor 21 is provided with a rotation sensor 71. The rotation sensor 71 includes a sensor magnet 72 as rotation information output means fixed to the armature shaft 26. The sensor magnet 72 is a multipolar magnetized magnet in which a plurality of magnetic poles are magnetized in the circumferential direction. Thus, it rotates with the armature shaft 26 and outputs a change in magnetic field as rotation information.

  On the other hand, as shown in FIGS. 3 and 7, on the control board 51, the first Hall IC 73 a as the first detection body and the second detection body as the second detection body are provided so as to face the sensor magnet 72, respectively. The Hall IC 73b is disposed at an angle of 90 degrees with respect to the axis of the armature shaft 26, and is provided to detect a change in the magnetic field output from the sensor magnet 72 with a phase difference of 45 degrees. Yes. Each Hall IC 73a, 73b detects a change in the magnetic field generated by the sensor magnet 72 and outputs it as a pulse signal having a period inversely proportional to the rotational speed of the armature shaft 26. Detection signals, that is, pulse signals of the Hall ICs 73a and 73b are input to the control circuit 51b, and the control circuit 51b receives the period of the pulse signals input from the Hall ICs 73a and 73b and the pulse signals input from the Hall ICs 73a and 73b. Control of the drive current supplied to the amateur coil 28 is executed based on the appearance timing and the like.

  FIG. 8 is an explanatory diagram showing the arrangement of the Hall ICs on the control board.

  In the sunroof motor 21, even when the control substrate 51 is displaced in the rotation direction around the positioning portion 61, the displacement amount of the Hall ICs 73 a and 73 b with respect to the sensor magnet 72 is made uniform, so that the rotation sensor 71 In order to increase the detection accuracy, the Hall ICs 73a and 73b are arranged on the control board 51 so that the distance from the positioning portion 61 is the same.

  As shown in FIG. 8, in the present embodiment, the positioning portion 61 is positioned on the axis L1 of the armature shaft 26 when viewed from the direction perpendicular to the control board 51, that is, the direction in which the cover body 37 is assembled to the gear case 36. Are arranged to be. The Hall ICs 73a and 73b are arranged side by side so that the distance from the axis L1 is the same on both sides of the armature shaft 26 when viewed from the viewpoint. That is, each Hall IC 73a, 73b connects the positioning portion 61 and the second Hall IC 73b with an angle α formed by a straight line L2 connecting the positioning portion 61 and the first Hall IC 73a with respect to the axis L1 of the amateur shaft 26. The straight line L3 is arranged so that the angle β formed with respect to the axis L1 of the amateur shaft 26 is the same.

  Thereby, even when the control substrate 51 is displaced in the rotation direction around the positioning portion 61, the relative displacement amount of the Hall ICs 73a and 73b with respect to the sensor magnet 72 is made uniform. Each phase is only offset in the same direction, and the difference in phase difference can be minimized. Therefore, even if the control board 51 is displaced in the rotation direction around the positioning portion 61, the detection accuracy of the first Hall IC 73a and the second Hall IC 73b is not greatly different, and the Hall ICs 73a and 73b are not significantly different. Thus, the rotation of the armature shaft 26 can be detected with high accuracy.

  Thus, in the sunroof motor 21, the first Hall IC 73 a and the second Hall IC 73 b facing the sensor magnet 72 are provided on the control board 51 so that the distance from the positioning portion 61 is the same. Therefore, even if the control board 51 is displaced in the rotation direction around the positioning portion 61, the relative displacement amount of the Hall ICs 73a and 73b with respect to the sensor magnet 72 is made uniform, and the Hall ICs 73a and 73b are made uniform. Thus, the accuracy of detecting the rotation of the armature shaft 26 can be increased.

  In the sunroof motor 21, as described above, the connecting pieces 55, 56, and 58 provided on the control board 51 are connected to the power terminals 53 and 54 and the ground terminal 57 provided on the brush device 31. Since the connection is made so as to be movable in the direction, the direction of the load applied to the control board 51 from the connection portion can be the direction perpendicular to the armature shaft 26, that is, the width direction of the sunroof motor 21. Thereby, the position shift in the rotation direction around the positioning portion 61 of the control board 51 due to the load from the connection portion is suppressed, and the rotation of the amateur shaft 26 by the first Hall IC 73a and the second Hall IC 73b. The detection accuracy can be further increased.

  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 present invention is applied to the sunroof motor 21 used in the sunroof device 11 of the vehicle 13. However, the present invention is not limited to this, for example, a slide door device or a power window device provided in the vehicle. You may make it apply to the electric motor used for.

  In the embodiment, the positioning portion 61 includes the positioning projection 62 provided on the gear case 36 and the positioning cylindrical portion 63 provided on the cover body 37, and the positioning hole 64 of the control board 51 is formed on the positioning cylindrical portion 63. The gear case 36 is provided with a positioning cylindrical portion 63 as a first engagement piece, and the cover body 37 is provided with a positioning projection 62 as a second engagement piece. The positioning hole 64 of the control board 51 may be engaged with the outer peripheral portion of the positioning cylindrical portion 63.

  Further, in the above-described embodiment, the positioning portion 61 has a structure including the positioning protrusion 62 provided on the gear case 36 and the positioning cylindrical portion 63 provided on the cover body 37. The body 37 is not provided with the positioning cylindrical portion 63, and the positioning projection 62 provided on the gear case 36 is used as the positioning portion 61, and this is inserted into and engaged with the positioning hole 64 of the control board 51, so You may make it position. The positioning projection 61 is not provided on the gear case 36, and the positioning cylindrical portion 63 provided on the cover body 37 is used as the positioning portion 61, which is inserted into and engaged with the positioning hole 64 of the control board 51 to cover the control board 51. The body 37 may be positioned.

  Furthermore, in the said embodiment, although what used the clip as the fixing means for fixing a board | substrate was demonstrated, it is good not only as this but a screw member, a nail | claw, etc.

It is explanatory drawing which shows the outline of the sunroof apparatus provided in the roof of the vehicle. (A), (b) is a perspective view which shows the detail of the sunroof motor shown in FIG. 1, respectively. FIG. 3 is an exploded perspective view of the sunroof motor shown in FIG. 2. It is a top view which shows arrangement | positioning of a brush holder. It is sectional drawing which follows the AA line in FIG.2 (b). It is a perspective view which shows the connection structure of a power supply terminal and a connection piece. It is sectional drawing which shows the detail of a positioning part. It is explanatory drawing which shows arrangement | positioning on the control board of each Hall IC.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Sunroof apparatus 12 Roof panel 13 Vehicle 13a Roof 13b Windshield 14 Opening part 15a, 15b Shoe 16 Guide rail 17a, 17b Drive cable 21 Sunroof motor (electric motor)
22 drive gear 23 motor body 24 yoke 25 amateur 26 amateur shaft 27 amateur core 28 amateur coil 29 commutator 31 brush device (power supply device)
32 Brush holders 33a, 33b Brush 34 Bolt 35 Nut 36 Gear case 36a Gear housing portion 36b Control board housing portion 36c Cable guide 36d Mounting hole 37 Cover body 37a Through hole 37b Guide wall 41 Worm gear mechanism (reduction mechanism)
41a Worm 41b Worm wheel 42 Output shaft 42a Tool hole 43 Gear cover 44 Guide plate 44a Guide wall 44b Claw part 51 Control board 51a Board 51b Control circuit 51c Dummy hole 52 Clip (fixing means)
52a Main body 52b Clip ball 52c Slit 53, 54 Power supply terminal 55, 56 Connection piece 55a Holding portion 55b Support portion 55c Connection piece regulating portion 55d Connection portion 57 Ground terminal 58 Connection piece 59 Connector 59a Connector base 61 Positioning portion 62 Positioning protrusion ( First engagement piece)
63 Positioning cylindrical part (second engagement piece)
63a Control board regulating part 63b Tapered surface 64 Positioning hole (positioned part)
71 Rotation sensor 72 Sensor magnet (Rotation information output means)
73a First Hall IC (first detector)
73b Second Hall IC (second detector)
L1 axis L2, L3 straight line α, β angle

Claims (8)

A yoke formed in a bottomed cylindrical shape;
A gear case fixed to the open end of the yoke;
A cover body attached to the gear case and closing the gear case;
An amateur shaft that projects into the gear case and is rotatably supported by the yoke;
A speed reduction mechanism that is housed in the gear case and decelerates rotation of the armature shaft and outputs from the output shaft;
A control circuit that controls a drive current supplied to the amateur, a control board that is fixed to the cover body by a fixing means and is accommodated in the gear case;
A first engagement piece provided on the gear case; and a second engagement piece provided on the cover body and engaged with the first engagement piece, wherein the first engagement piece or the second engagement piece is provided. , together with positioning the control board engaging the portion to be positioned which is provided on the control board with respect to the gear case, positioning portion disposed on the axis of the armature shaft as viewed from a direction perpendicular to the control board When,
Rotation information output means fixed to the amateur shaft and rotating together with the amateur shaft;
The rotation information output means is provided on the control board on both sides of the armature shaft as viewed from the direction perpendicular to the control board, with the same distance from the axis. An electric motor comprising first and second detectors for detecting rotation information generated by the information output means.   2. The electric motor according to claim 1, wherein the first engagement piece is formed in a protruding shape, the second engagement piece is formed in a cylindrical shape through which the first engagement piece is inserted, and the positioned portion is The electric motor is formed in a hole shape through which the second engagement piece is inserted. A yoke formed in a bottomed cylindrical shape;
A gear case fixed to the open end of the yoke;
An amateur shaft that projects into the gear case and is rotatably supported by the yoke;
A speed reduction mechanism that is housed in the gear case and decelerates rotation of the armature shaft and outputs from the output shaft;
A control circuit for controlling a driving current supplied to the amateur, a control board fixed to the gear case by a fixing means and accommodated in the gear case;
Positioning that is provided on the gear case on the axis of the armature shaft viewed from a direction perpendicular to the control board and engages with a positioned portion provided on the control board to position the control board with respect to the gear case. And
Rotation information output means fixed to the amateur shaft and rotating together with the amateur shaft;
The rotation information output means is provided on the control board on both sides of the armature shaft as viewed from the direction perpendicular to the control board, with the same distance from the axis. An electric motor comprising first and second detectors for detecting rotation information generated by the information output means. A yoke formed in a bottomed cylindrical shape;
A gear case fixed to the open end of the yoke;
A cover body attached to the gear case and closing the gear case;
An amateur shaft that projects into the gear case and is rotatably supported by the yoke;
A speed reduction mechanism that is housed in the gear case and decelerates rotation of the armature shaft and outputs from the output shaft;
A control circuit that controls a drive current supplied to the amateur, a control board that is fixed to the cover body by a fixing means and is accommodated in the gear case;
The cover body is provided on the axis of the armature shaft viewed from a direction perpendicular to the control board, and engages with a positioned portion provided on the control board to position the control board with respect to the gear case. A positioning part;
Rotation information output means fixed to the amateur shaft and rotating together with the amateur shaft;
The rotation information output means is provided on the control board on both sides of the armature shaft as viewed from the direction perpendicular to the control board, with the same distance from the axis. An electric motor comprising first and second detectors for detecting rotation information generated by the information output means.   5. The electric motor according to claim 3, wherein the positioning portion is formed in a protruding shape, and the positioned portion is formed in a hole shape through which the positioning portion is inserted. 6. The electric motor according to claim 1, wherein an angle formed by a straight line connecting the positioning portion and the first detection body with respect to an axis of the amateur shaft, the positioning portion, and the first An electric motor, wherein a straight line connecting the two detection bodies is arranged so that an angle formed with respect to the axis of the amateur shaft is the same . 7. The electric motor according to claim 1, wherein a power supply device for supplying power to the armature is attached to an opening end of the yoke, and the power supply device is disposed inside the gear case. It provided a pair of power supply terminals, an electric motor characterized by Rukoto pair of connecting pieces that are movably connected is provided in the axial direction of the armature shaft to said power supply terminal, respectively to the control board corresponding. 8. The electric motor according to claim 7 , wherein the pair of power supply terminals are arranged side by side in a direction orthogonal to the amateur shaft .

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