JP5343824B2 - Drive device - Google Patents

Description

  The present invention relates to a drive device including an electromagnetic clutch.

  2. Description of the Related Art Conventionally, a drive device for a vehicle sliding door or the like that includes an electromagnetic clutch is used (see, for example, Patent Document 1). The electromagnetic clutch includes a first rotating body that is rotationally driven by a motor that is a driving source, a second rotating body that is axially opposed to the first rotating body, and an axial direction that is opposite to the first rotating body. The armature member is provided so as to be movable and integrally rotatable, and magnetic force generating means for attracting (pressure-contacting) the armature member to the second rotating body side by the generated magnetic force and drivingly connecting them.

  In addition, such a driving device includes a sensor magnet that is fixed to a second rotating body that rotates corresponding to the opening / closing position of the vehicle sliding door and generates a magnetic field that changes in the circumferential direction, and is opposed to the sensor magnet. And a sensor for detecting a change in the magnetic field. The sensor magnet is formed in an annular shape and is fixed with an adhesive or the like substantially along the outer peripheral surface of the second rotating body.

JP 2000-179233 A

  However, in the drive device as described above, the sensor magnet is fixed to the second rotating body using an adhesive, so that the assembling property is bad and the time for drying the adhesive is required, and the manufacturing time becomes long. There is a problem that it ends up. This causes a high cost.

  In addition, when the second rotating body made of different materials and the sensor magnet are fixed to a solid in the radial direction, there is a possibility that the sensor magnet may break due to a difference in thermal expansion coefficient or the like. However, in this case, it is difficult to position the sensor magnet in the radial direction. As a result, the shaft center of the sensor magnet is shifted from the shaft center of the rotating shaft, and as a result, there is a risk that erroneous detection occurs in the sensor.

  SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and its object is to achieve radial positioning of a sensor magnet while avoiding breakage of a member while improving assembly and shortening manufacturing time. It is an object of the present invention to provide a drive device that can perform the above with high accuracy.

  In order to solve the above-mentioned problem, in the invention described in claim 1, a first rotating body that is rotationally driven, and an armature member that is axially movable and integrally rotatable with the first rotating body. A magnetic force is generated by energization with a second rotating body that is axially opposed to the armature member and is rotatably provided with the armature member, and the armature member is attracted to the second rotating body by the magnetic force. Magnetic force generating means for drivingly connecting them so as to be integrally rotatable, a sensor magnet that is fixed to the second rotating body and that generates a magnetic field that changes in the circumferential direction, and is disposed opposite to the sensor magnet, A driving device including a sensor for detecting a change, wherein the first claw portion is engaged with the second rotating body while being pressed in the radial direction, and is pressed against the sensor magnet in the radial direction. Comprising a fixing member and a second claw portion is integrally molded to be reluctant-engaging, and gist that via the fixing member fixed to said sensor magnet and the second rotating body.

  According to this configuration, the second rotating body and the sensor magnet are engaged with the first claw portion that is engaged with the second rotating body while being pressed in the radial direction, and the second rotating body and the sensor magnet are engaged with the sensor magnet while being pressed in the radial direction. The second claw portion to be fixed is fixed via an integrally formed fixing member. Therefore, for example, the assemblability is improved and the manufacturing time can be shortened (no time to dry the adhesive) as compared with the case of fixing using an adhesive (prior art). Moreover, since the first claw portion is engaged with the second rotating body while being pressed in the radial direction, and the second claw portion is engaged with the sensor magnet while being pressed in the radial direction, for example, based on thermal expansion or the like. Positioning in the radial direction between the second rotating body and the sensor magnet can be performed with high accuracy while avoiding the sensor magnet from being broken. That is, when members made of different materials are fixed to a solid in the radial direction, there is a risk that the sensor magnet will break due to differences in thermal expansion coefficient, etc. If it is held and fixed from the axial direction), it is difficult to position the sensor magnet in the radial direction, and as a result, there is a possibility that erroneous detection occurs in the sensor due to the positional deviation, but both of them can be avoided.

  According to a second aspect of the present invention, in the drive device according to the first aspect, the sensor magnet is fixed to the outer peripheral surface of the second rotating body via the fixing member.

  According to this configuration, since the sensor magnet is fixed to the outer peripheral surface of the second rotating body via the fixing member, the adverse effect of the magnetic force by the magnetic force generating means for attracting the armature member in the axial direction is naturally reduced. Can be reduced. That is, since the sensor magnet is disposed radially outside the magnetic force (its magnetic closed loop) by the magnetic force generating means for attracting the armature member in the axial direction, the sensor magnet is hardly affected by the magnetic force. The false detection by the sensor can be reduced naturally.

  According to a third aspect of the present invention, in the drive device according to the first or second aspect, the magnetic force generating means is fixed to be integrally rotatable with the second rotating body, and the fixing member The gist of the present invention is that the generating means side power supply member that is in sliding contact with the housing side power supply member provided on the housing side and that supplies power to the magnetic force generating means via the housing side power supply member is fixed.

  According to this configuration, the generating member-side power supply member that is in sliding contact with the housing-side power supply member provided on the housing side and supplies power to the magnetic force generating device via the housing-side power supply member is fixed to the fixing member. Therefore, the configuration is simple compared to the case where the generating means side power supply member is separately fixed to the second rotating body.

  According to a fourth aspect of the present invention, in the drive device according to any one of the first to third aspects, the sensor magnet is formed in an annular shape, and the second claw portion is arranged in the circumferential direction. The gist is that they are formed at equiangular intervals.

According to this configuration, since the second claw portions are formed at equal angular intervals in the circumferential direction, the fixing member and the annular sensor magnet can be fixed in a balanced manner in the circumferential direction.
According to a fifth aspect of the present invention, in the drive device according to any one of the first to fourth aspects, the first claw portions are formed at equal angular intervals in the circumferential direction.

According to this configuration, since the first claw portions are formed at equal angular intervals in the circumferential direction, the fixing member and the second rotating body can be fixed in a balanced manner in the circumferential direction.
According to a sixth aspect of the present invention, in the driving device according to any one of the first to fifth aspects, the first claw portions and the second claw portions are alternately formed in the circumferential direction. The gist.

  According to this configuration, since the first claw portion and the second claw portion are alternately formed in the circumferential direction, the annular sensor magnet and the second rotating body are respectively circumferentially arranged with respect to the fixing member. Can be fixed in good balance.

  According to the present invention, it is possible to provide a drive device capable of highly accurately positioning the sensor magnet in the radial direction while improving the assembly property and shortening the manufacturing time and avoiding damage to the member. .

The disassembled perspective view of the drive device in this Embodiment. Sectional drawing of the drive device in this Embodiment. The top view of the worm wheel and leaf | plate spring in this Embodiment. AA sectional drawing of FIG. The partial expanded sectional view for demonstrating the member for fixing in this Embodiment. The partial expanded sectional view for demonstrating the member for fixing in this Embodiment.

  Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS. The drive device according to the present embodiment is connected to a vehicle slide door via a cable or the like (not shown) to open and close the vehicle slide door.

  As shown in FIG. 1, the drive device according to the present embodiment includes a motor 1 that is a drive source, an output unit 2 that is assembled to the motor 1, and a control circuit unit 3 that is assembled to the output unit 2. The motor 1 of the present embodiment is a direct current motor, and rotationally drives a worm 1a that protrudes into the case 11 of the output unit 2.

  As shown in FIGS. 1 and 2, the output unit 2 includes the case 11, the case cover 12, the worm wheel 13, the leaf spring 14, the armature member 15, the bearing 16, the rotor 17, and the rotating shaft. 18, a coil member 19 (see FIG. 2), a fixing member 20, a sensor magnet 21, a Hall IC 22 (see FIG. 2) as a sensor, and the like. In the present embodiment, the worm wheel 13 as the first rotating body, the leaf spring 14, the armature member 15, the bearing 16, the rotor 17 as the second rotating body, and the magnetic force generating means. The coil member 19 (see FIG. 2) constitutes an electromagnetic clutch. Further, the case 11 and the case cover 12 constitute a housing.

  As shown in FIG. 1, the case 11 includes a fixed portion 11a fixed to the motor 1, a worm storage portion 11b extending cylindrically from the fixed portion 11a and storing the worm 1a, and the worm storage portion 11b. And a wheel receiving recess 11c for receiving the worm wheel 13 formed in a substantially bottomed cylindrical shape with an axial center along a direction orthogonal to the worm 1a. As shown in FIG. 2, a cylindrical portion 11d that protrudes into and out of the wheel housing recess 11c and communicates between the inside and the outside is formed at the shaft center at the bottom of the wheel housing recess 11c.

  As shown in FIGS. 1 and 2, the case cover 12 is formed in a substantially bottomed cylindrical shape, and the opening end thereof is combined with the opening end of the wheel receiving recess 11 c so as to be substantially sealed inside. It is fixed to the case 11 with screws N so that K is formed.

  The worm wheel 13 is rotatably provided in the housing space K (specifically, in the wheel housing recess 11c) so as to rotate in a state engaged with the worm 1a so as to be driven to rotate based on the rotation of the worm 1a. Yes. In each figure, illustration of the teeth of the worm 1a and the worm wheel 13 is omitted.

The worm wheel 13 is provided with the armature member 15 so as to be rotatable integrally with the worm wheel 13 via the leaf spring 14 having flexibility in the axial direction.
More specifically, the worm wheel 13 of the present embodiment is made of a resin material and is formed in a substantially disk shape having a center hole 13a as shown in FIG. A plurality of press-fit portions 13c are recessed in one end surface of the worm wheel 13 (the end surface on the case cover 12 side, which is the upper end surface in FIG. 2) 13b. Three press-fit portions 13c of the present embodiment are formed at equiangular (120 °) intervals in the circumferential direction. Each press-fitted portion 13c includes an arc recess 13d formed in an arc shape centered on the axial center X of the worm wheel 13, and a radial recess 13e extending radially outward from both circumferential sides of the arc recess 13d. Become. An inclined surface 13f that is inclined from one end face 13b of the worm wheel 13 toward the bottom side of the press-fit portion 13c is formed on the entire periphery of the opening of the press-fit portion 13c of the present embodiment.

  Further, as shown in FIGS. 3 and 4, a plurality of engaging convex portions 13 g and 13 h are formed on one end surface 13 b of the worm wheel 13. The engagement convex portions 13g and 13h of the present embodiment are formed in three pairs (that is, a total of six) at equiangular (120 °) intervals in the circumferential direction. The pair of engaging convex portions 13g and 13h are formed symmetrically with respect to a straight line L1 passing through the axial center X and the circumferential center of the press-fit portion 13c when viewed from the axial direction of the worm wheel 13. ing. And each engagement convex part 13g, 13h has the 1st power transmission part 13i extended in parallel with the said straight line L1 seeing from an axial direction. Further, each of the engaging convex portions 13g and 13h extends in parallel with a straight line L2 passing through the axial center X and the circumferential center between the press-fit portions 13c adjacent in the circumferential direction when viewed from the axial direction. It has the 2nd power transmission part 13j. The first power transmission portion 13i and the second power transmission portion 13j in the engagement convex portions 13g and 13h are smoothly connected to each other radially inward (specifically, via a convex curved portion on the axial center X side). Yes. Further, on one end surface 13b of the worm wheel 13 of the present embodiment, an auxiliary engagement convex portion 13k is formed on the straight line L2 (between the second power transmission portions 13j adjacent in the circumferential direction). In addition, the one end surface 13b of the worm wheel 13 of the present embodiment is stepped so as to be recessed on the outer peripheral edge and on the radially outer side of the auxiliary engagement convex portion 13k (in the rear side of the sheet in FIG. 3). A stepped portion 13l having is formed. Further, in the one end surface 13b of the worm wheel 13 of the present embodiment, a concave portion 13m extending in the radial direction is formed on the straight line L1 (between the first power transmission portions 13i adjacent to each other in the circumferential direction) (see FIG. 4). Etc. are formed.

  1 and 3, the leaf spring 14 includes an annular portion 14a, a plurality of power transmission pieces 14b extending in the radial direction from the annular portion 14a and coupled to the worm wheel 13, and an annular portion. It extends radially outward from 14 a and is more easily bent than the power transmission piece 14 b, and has a plurality of bending pieces 14 c in the circumferential direction connected to the armature member 15. The power transmission pieces 14b and the flexure pieces 14c of the present embodiment are alternately formed in the circumferential direction and are formed at equiangular (60 °) intervals.

  The annular portion 14a has an inner diameter that substantially matches the inner diameter of the worm wheel 13 (the diameter of the center hole 13a), and the outer diameter thereof passes through the radially inner ends of the engaging convex portions 13g and 13h. It is formed to have a diameter slightly smaller than a circle.

  As shown in FIG. 4, the surface of the power transmission piece 14b along the plate thickness direction rotates with the engaging convex portions 13g and 13h of the worm wheel 13 (specifically, the side surface of the first power transmission portion 13i). A rotation engagement surface 14d that engages in the direction is formed. That is, the width of the power transmission piece 14b viewed from the axial direction is substantially the same as the interval between the pair of engaging convex portions 13g and 13h (specifically, the side surfaces of the first power transmission portion 13i). In this embodiment, the width is set to be slightly smaller than the interval (so that it can be easily inserted between the axial direction), and both side surfaces extending along the radial direction are the rotational engagement surfaces 14d. In addition, the height along the axial direction of the engaging convex portions 13g and 13h (specifically, the side surface of the first power transmission portion 13i) of the present embodiment is the material of the leaf spring 14 as shown in FIG. The thickness of the power transmission piece 14b is set to be equal to the thickness of the metal plate.

  Further, as shown in FIGS. 1 and 3, the power transmission piece 14b is formed with a press-fit portion 14e extending in the thickness direction, and the press-fit portion 14e is press-fitted into the press-fit portion 13c of the worm wheel 13. Thus, the power transmission piece 14 b is coupled to the worm wheel 13. The press-fit portion 14e is formed with a press-fit rotation engagement portion 14f that extends radially outward and engages with the inner wall of the press-fit portion 13c in the rotation direction. Specifically, the press-fit portion 14e extends from the tip end portion of the power transmission piece 14b so as to be bent so as to have a surface orthogonal to the radial direction, and protrudes in the circumferential direction from both circumferential sides of the bent portion 14g. The arcuate part 14h formed as described above, and the press-fitting and engaging part 14f formed to bend so as to extend substantially along the radial direction from the tip of the arcuate part 14h. The press-fitting rotation engaging portion 14f is provided so as to press-contact the inner wall of the press-fit portion 13c (its radial recess 13e) in the circumferential direction by press-fitting the press-fit portion 14e into the press-fit portion 13c. That is, the press-fit portion 14e has an arc portion 14h formed so as to protrude and extend in the circumferential direction, and the press-fit rotation engagement portion 14f is bent from the tip of the arc portion 14h. The engaging portion 14f has good elasticity to press in the circumferential direction (on the surface along the radial direction) to the inner wall of the radial recess 13e of the pressed-in portion 13c.

  A first output that engages with the engaging projections 13g and 13h of the worm wheel 13 (specifically, the side surface of the second power transmission unit 13j) on the surface along the thickness direction of the bending piece 14c. A side rotation engagement surface 14i is formed. That is, the width of the bending piece 14c viewed from the axial direction is substantially the same as the interval between the side surfaces of the second power transmission portions 13j adjacent to each other in the circumferential direction. Both side surfaces that are set to a small width (so that they can be easily inserted between the directions) and extend along the radial direction are first output-side rotation engagement surfaces 14i.

  Further, the bending piece 14c is formed with a fastening hole 14j penetrating in the thickness direction at the tip thereof, and a through-hole 14k penetrating in the thickness direction at an intermediate portion thereof (inward in the radial direction from the fastening hole 14j). Is formed. This through-hole 14k has desired spring characteristics (axial flexibility) of the bending piece 14c. The inner side surface (the surface along the plate thickness direction) of the through hole 14k of the bending piece 14c is a second output-side rotation engagement surface 14l that engages with the auxiliary engagement convex portion 13k in the rotation direction. . That is, the width along the radial direction in the through hole 14k is substantially the same as the width in the same direction of the auxiliary engagement convex portion 13k. Both inner side surfaces which are set to have a large width (so that the convex portion 13k can be easily inserted) and extend along the radial direction are the second output-side rotation engagement surfaces 14l.

  As shown in FIG. 2, the bending piece 14 c of the leaf spring 14 and the armature member 15 are connected by a rivet 31 that passes through the fastening hole 14 j and the fastening hole 15 a provided in the armature member 15. The armature member 15 is made of a magnetic material and has a substantially disk shape having a plurality (three) of the fastening holes 15a and the center holes 15b at equiangular (120 °) intervals in the circumferential direction as shown in FIG. Is formed. The diameter of the center hole 15b is formed to be larger than the inner diameter of the worm wheel 13 (the diameter of the center hole 13a) and the inner diameter of the annular portion 14a. Further, in a state where the coil member 19 (see FIG. 2) described later is not energized, the bending piece 14c of the leaf spring 14 does not bend and is the same as the annular portion 14a and the power transmission piece 14b (except the press-fit portion 14e). The armature member 15 is held on a plane and is attracted to the worm wheel 13 side.

  A bearing 16 is fixed to the center hole 13a of the worm wheel 13 according to the present embodiment. The bearing 16 is a metal bearing, is formed in a substantially cylindrical shape, and is press-fitted and fixed in the center hole 13a. The bearing 16 is integrally formed with a restricting portion 16 a for restricting the axial movement of the annular portion 14 a of the leaf spring 14 with respect to the worm wheel 13. That is, the restricting portion 16a is formed to extend radially outward from a portion protruding from the center hole 13a of the bearing 16 toward one end side in the axial direction (upper side in FIG. 2), and to one end surface of the worm wheel 13. It is provided so that the said annular part 14a may be clamped with 13b. The outer diameter of the restricting portion 16a is slightly smaller than the diameter of the central hole 15b of the armature member 15.

  The rotor 17 is provided to face the armature member 15 in the axial direction so as to be rotatable relative to the armature member 15. Specifically, the rotor 17 is made of a magnetic material and is formed in a substantially disk shape having a center hole 17a as shown in FIG. The rotor 17 has a rotary shaft 18 press-fitted and fixed in the center hole 17a. The rotary shaft 18 is rotatably supported by a bearing 32 provided in the cylindrical portion 11d of the case 11 and a bearing 33 provided in the center of the bottom of the case cover 12, so that the rotor 17 is armature member 15. And are provided rotatably in the axial direction. The rotating shaft 18 is inserted into the bearing 16 fixed to the worm wheel 13 as described above, and supports the worm wheel 13 in a rotatable manner. Further, the coil member 19 (see FIG. 2), which will be described later, is energized at the end surface of the rotor 17 facing the armature member 15 (on the other end side in the axial direction, the lower side in FIG. 2). In a state where there is no armature member 15, that is, in a state where the armature member 15 is attracted to the worm wheel 13 side, the armature member 15 is disposed at a position slightly separated (about １ ／ of the plate thickness of the leaf spring 14).

  On the outer peripheral side of the rotor 17, an annular coil housing recess 17 b is formed that opens on the side facing the armature member 15 (on the other end side in the axial direction and on the lower side in FIG. 2). A plurality of locking grooves 17c (see FIGS. 1 and 5) are formed on the outer peripheral edge of the rotor 17 on the side facing the armature member 15. In the rotor 17 of the present embodiment, three locking grooves 17c (only two are shown in FIG. 1) are formed at equiangular (120 °) intervals. In the rotor 17, a plurality of through holes 17d (only one is shown in FIG. 2) penetrating in the axial direction are formed at the bottom of the coil housing recess 17b.

  As shown in FIG. 2, the coil member 19 is housed and held in the coil housing recess 17 b of the rotor 17. The coil member 19 has a coil 19b wound around a bobbin 19a, and a projection 19c formed on the bobbin 19a is inserted into the through-hole 17d so that the periphery of the coil member 19 is stopped. It is held in the coil housing recess 17b so as to rotate integrally.

  Further, the sensor magnet 21 is fixed to the outer peripheral surface of the rotor 17 via the fixing member 20. More specifically, the sensor magnet 21 is formed in an annular shape, and N and S poles are alternately magnetized in the circumferential direction so as to generate a magnetic field that changes in the circumferential direction.

  The fixing member 20 is made of a resin material and is formed in a substantially bottomed cylindrical shape having a central hole 20b in the bottom portion 20a as shown in FIGS. As shown in FIG. 5, a first claw portion 20d engaged with the rotor 17 while being in radial contact with the cylindrical portion 20c of the fixing member 20, and a sensor magnet 21 as shown in FIG. And a second claw portion 20e which is engaged while being pressed in the radial direction are integrally formed.

  Three first claw portions 20d are formed at equiangular (120 °) intervals in the circumferential direction, and as shown in FIG. 5, a first piece 20f extending from the bottom 20a side of the cylindrical portion 20c to the opening side, A first return portion 20g extending radially inward from the tip of the first piece 20f. Then, with the rotor 17 inserted into the cylindrical portion 20c up to the bottom portion 20a, the first return portion 20g fits into the locking groove 17c, and the rotor 17 is sandwiched between the bottom portion 20a and the first return portion 20g in the axial direction. Thus, the first claw portion 20d (and eventually the fixing member 20) and the rotor 17 are engaged. The first piece 20f is arranged in a slightly radial inner side with respect to the inner circumference of the cylindrical portion 20c, so that the first piece 20f is always in pressure contact with the outer circumferential surface of the rotor 17 in the radial direction.

  Three second claw portions 20e are formed at equiangular (120 °) intervals in the circumferential direction, and as shown in FIG. 6, a second piece 20h extending from the opening side of the cylindrical portion 20c to the bottom 20a side, And a second return portion 20i extending radially outward from the tip of the second piece 20h. A flange portion 20j extending outward in the radial direction is formed at the opening of the cylindrical portion 20c. The second claw portion is formed by sandwiching the sensor magnet 21 in the axial direction between the flange portion 20j and the second return portion 20i in a state in which the sensor magnet 21 is fitted on the cylindrical portion 20c until the flange portion 20j comes into contact with the flange portion 20j. 20e (and thus the fixing member 20) and the sensor magnet 21 are engaged. The second piece 20h is arranged slightly outside the outer circumference of the cylindrical portion 20c in the radial direction, so that the second piece 20h is always in pressure contact with the inner circumferential surface of the sensor magnet 21 in the radial direction. The first claw portions 20d and the second claw portions 20e are alternately formed in the circumferential direction, and are provided at equiangular (60 °) intervals in the circumferential direction.

  As shown in FIG. 1, anode-side and cathode-side brushes 34, 35 serving as generating means-side power supply members are fixed to the fixing member 20 via urging plate springs 36, 37. The urging plate springs 36 and 37 are provided so as to extend obliquely from the central hole 20b of the fixing member 20 radially inward and to the case cover 12 side (opposite side from which the cylindrical portion 20c extends). Brushes 34 and 35 are fixed to each tip. The urging plate springs 36 and 37 are provided such that the radial positions of the anode-side and cathode-side brushes 34 and 35 (distance from the axial center of the fixing member 20) are different. On the other hand, on the case cover 12 of the present embodiment, annular anode-side and cathode-side conductive plates 38 and 39 having different diameters are laid as housing-side power supply members. The anode-side and cathode-side brushes 34 and 35 are pressed (slidably contacted) from the axial direction on the anode-side and cathode-side conductive plates 38 and 39 by the urging forces of the urging plate springs 36 and 37, respectively. (Not shown). Further, as shown in FIG. 2, a through hole 20k is formed in the bottom portion 20a of the fixing member 20, and a convex portion 19c of the coil member 19 that penetrates the through hole 17d of the rotor 17 is formed in the through hole 20k. The tip of is inserted.

  Further, in the case cover 12, the control circuit unit 3 has a Hall IC 22 for detecting a change in magnetic field mounted on the sensor substrate 22 a at a position facing the outer peripheral surface of the sensor magnet 21 in the radial direction. It is arranged in.

  The control circuit unit 3 contains a control IC and various electric parts (not shown) in its housing, and is fixed to the case 11 of the output unit 2 so that the Hall IC 22, the anode side and the cathode side are fixed. Are electrically connected to the conductive plates 38 and 39. An external connector (not shown) is fitted into the control circuit unit 3 (the housing), and the power supply control device is electrically connected through the external connector. In addition, a vehicular slide door is connected to a tip portion of the rotary shaft 18 projecting outside from the cylindrical portion 11d of the case 11 via a cable or the like (not shown).

  In the drive device configured as described above, when the coil member 19 (see FIG. 2) is not energized, the bending piece 14c of the leaf spring 14 is not bent, and the armature member 15 and the rotor 17 are not bent. They are separated and become a non-drive coupled state. In this state, the rotational force from the rotor 17 is not transmitted to the worm wheel 13 and thus to the motor 1 side, and the vehicle sliding door can be easily opened and closed manually. Further, when a magnetic force is generated in the coil member 19 by energization, the armature member 15 is attracted (pressure contacted) to the rotor 17 side while the bending piece 14c of the leaf spring 14 is bent by the magnetic force and integrated with the rotor 17. Drive-coupled rotatably. In this state, when the motor 1 and eventually the worm wheel 13 are rotationally driven, the driving force is transmitted in the order of the power transmission piece 14b of the leaf spring 14, the annular portion 14a, the bending piece 14c, and the armature member 15. The rotor 17 and the rotating shaft 18 are rotationally driven together with the armature member 15. Thereby, the sliding door for vehicles is driven to open and close. At this time, the rotation of the motor 1 is controlled in accordance with the change of the magnetic field detected by the Hall IC 22 (by the sensor magnet 21 corresponding to the opening / closing position of the vehicle sliding door).

Next, characteristic effects of the above embodiment will be described below.
(1) The rotor 17 and the sensor magnet 21 include a first claw portion 20d that is engaged with the rotor 17 while being pressed in the radial direction, and a second claw portion that is engaged with the sensor magnet 21 while being pressed in the radial direction. 20e is fixed through a fixing member 20 formed integrally. Therefore, for example, the assemblability is improved and the manufacturing time can be shortened (no time to dry the adhesive) as compared with the case of fixing using an adhesive (prior art). Moreover, since the first claw portion 20d is engaged with the rotor 17 while being pressed in the radial direction, and the second claw portion 20e is engaged with the sensor magnet 21 while being pressed in the radial direction, for example, based on thermal expansion or the like. Positioning of the rotor 17 and the sensor magnet 21 in the radial direction can be performed with high accuracy while avoiding the sensor magnet 21 from being broken. That is, when members made of different materials are fixed to a solid in the radial direction, there is a risk that the sensor magnet will break due to differences in thermal expansion coefficient, etc. If it is held and fixed from the axial direction), positioning of the sensor magnet in the radial direction becomes difficult, and as a result, misalignment may occur in the sensor (Hall IC 22) due to the positional deviation. it can.

  (2) Since the sensor magnet 21 is fixed to the outer peripheral surface of the rotor 17 via the fixing member 20, the adverse effect of the magnetic force by the coil member 19 for attracting the armature member 15 in the axial direction is naturally reduced. Can do. That is, the sensor magnet 21 is arranged on the outside in the radial direction of the magnetic force (its magnetic closed loop) by the coil member 19 for attracting the armature member 15 in the axial direction, and thus is hardly affected by the magnetic force. As a result, erroneous detection by the sensor (Hall IC 22) can be naturally reduced. In the present embodiment, since the fixing member 20 is interposed between the sensor magnet 21 and the outer peripheral surface of the rotor 17, the sensor magnet 21 is configured to be in direct contact with the outer peripheral surface of the rotor 17. In comparison, the sensor magnet 21 is disposed on the outer side in the radial direction by the thickness of the fixing member 20. Therefore, the adverse effect of the magnetic force due to the coil member 19 can be made more difficult to receive.

  (3) The coil member 19 is fixed so as to be rotatable together with the rotor 17. The fixing member 20 is in slidable contact with the anode-side and cathode-side conductive plates 38, 39 provided on the case cover 12, and an anode for supplying power to the coil member 19 through the conductive plates 38, 39. Since the brushes 34 and 35 on the side and the cathode side are fixed, the configuration becomes simple compared to the case where the brushes 34 and 35 are separately fixed to the rotor 17.

  (4) Since the second claw portions 20e are formed at equiangular (120 °) intervals in the circumferential direction, the fixing member 20 and the annular sensor magnet 21 can be fixed in a balanced manner in the circumferential direction.

(5) Since the first claw portions 20d are formed at equiangular (120 °) intervals in the circumferential direction, the fixing member 20 and the rotor 17 can be fixed in a balanced manner in the circumferential direction.
(6) Since the first claw portions 20d and the second claw portions 20e are alternately formed in the circumferential direction, the annular sensor magnet 21 and the rotor 17 are respectively balanced with respect to the fixing member 20 in the circumferential direction. Can be fixed.

The above embodiment may be modified as follows.
In the above embodiment, the sensor magnet 21 is fixed to the outer peripheral surface of the rotor 17 via the fixing member 20, but the first claw portion that is engaged with the rotor while being pressed in the radial direction; If the sensor magnet and the second claw portion engaged with the sensor magnet while being pressed in the radial direction are fixed via an integrally formed fixing member, the sensor magnet may be fixed to another portion of the rotor. However, even in this case, it is necessary to fix the sensor magnet to another place that is not easily affected by the magnetic force (its magnetic closed loop) by the coil member.

  In the above embodiment, the fixing member 20 is interposed between the sensor magnet 21 and the outer peripheral surface of the rotor 17. However, the present invention is not limited to this, and the fixing member 20 is interposed between the sensor magnet and the outer peripheral surface of the rotor. It is good also as a structure which does not interpose. For example, the first claw portion and the second claw portion of the fixing member may be configured to sandwich the rotor and the sensor magnet in the radial direction so that the magnet is directly contacted and fixed to the outer peripheral surface of the rotor. Good. That is, the sensor magnet may be fixed so as to be in direct contact with the outer peripheral surface of the rotor through the fixing member, in other words, by the action of the fixing member. Even in this case, since the sensor magnet 21 can be disposed on the radially outer side of the magnetic force (its magnetic closed loop) by the coil member 19, it is difficult to be adversely affected by the magnetic force, and thus the sensor (Hall IC 22). It is possible to naturally reduce false detection in

  In the above embodiment, the coil member 19 is fixed to the rotor 17 so as to be integrally rotatable. However, the present invention is not limited to this, and the coil member 19 may be fixed to the case cover 12 so as to face the rotor 17. . In this case, there is no need to provide the fixing member 20 with the anode-side and cathode-side brushes 34, 35 and the case cover 12 with the anode-side and cathode-side conductive plates 38, 39.

  In the above embodiment, the housing side power supply member provided on the case cover 12 is the anode side and cathode side conductive plates 38 and 39, and the generating means side power supply member provided on the fixing member 20 is the anode side and cathode side. Although the brushes 34 and 35 are used, the housing-side power supply member and the generation means-side power supply member may be changed to those having other configurations as long as they are in sliding contact with each other and electrically connected. For example, the case cover 12 may be provided with a brush as a housing side power supply member, and the fixing member 20 may be provided with an annular conductive plate as a generating means side power supply member. Further, the generating means-side power supply member may be separately fixed to the rotor 17 (not fixed to the fixing member 20 but with another configuration).

  -In above-mentioned embodiment, although the 2nd nail | claw part 20e was formed in equiangular (120 degree) space | interval in the circumferential direction, it is not limited to this, For example, you may form in unequal angle space | interval. . Further, the number of the second claw portions 20e may be changed to other numbers.

  In the above embodiment, the first claw portions 20d are formed at regular angular intervals (120 °) in the circumferential direction. However, the present invention is not limited to this, and may be formed at irregular angular intervals, for example. . Further, the number of the first claw portions 20d may be changed to other numbers.

  In the above embodiment, the first claw portions 20d and the second claw portions 20e are alternately formed in the circumferential direction. However, the present invention is not limited to this. For example, the first claw portion 20d is formed in the circumferential direction. You may change into the structure that two are formed continuously.

In the above embodiment, the Hall IC 22 is used as a sensor, but may be changed to another sensor as long as a change in the magnetic field by the sensor magnet can be detected.
-Although the drive device of the said embodiment was used for performing the opening / closing operation | movement of the sliding door for vehicles, it is not limited to this, You may actualize to the drive device for performing other operation | movement.

  DESCRIPTION OF SYMBOLS 13 ... Worm wheel (1st rotary body), 15 ... Armature member, 17 ... Rotor (2nd rotary body), 19 ... Coil member (magnetic force generation means), 20 ... Fixing member, 20d ... 1st nail | claw part , 20e: second claw portion, 21: sensor magnet, 22: Hall IC (sensor), 34, 35 ... anode side and cathode side brush (generation means side power supply member), 38, 39 ... anode side and cathode side Conductive plate (housing side power supply member).

Claims (6)

A first rotating body that is rotationally driven;
An armature member provided so as to be axially movable and integrally rotatable with the first rotating body;
A second rotating body that is axially opposed to the armature member and is rotatably provided with the armature member;
A magnetic force generating means for generating a magnetic force by energization, attracting the armature member to the second rotating body side by the magnetic force, and drivingly connecting them so as to be integrally rotatable;
A sensor magnet that generates a magnetic field that is fixed to the second rotating body and changes in the circumferential direction;
A driving device including a sensor that is disposed opposite to the sensor magnet and detects a change in a magnetic field;
A fixing member in which a first claw portion engaged with the second rotating body while being pressed in the radial direction and a second claw portion engaged with the sensor magnet while being pressed in the radial direction are integrally formed. And the second rotating body and the sensor magnet are fixed via the fixing member. The drive device according to claim 1,
The drive device according to claim 1, wherein the sensor magnet is fixed to an outer peripheral surface of the second rotating body via the fixing member. The drive device according to claim 1 or 2,
The magnetic force generating means is fixed to be integrally rotatable with the second rotating body,
The fixing member includes a generating means side power supply member that is in sliding contact with a housing side power supply member provided on the housing side and that supplies power to the magnetic force generation means via the housing side power supply member. The drive device characterized. In the drive device according to any one of claims 1 to 3,
The sensor magnet is formed in an annular shape,
The drive device according to claim 1, wherein the second claw portions are formed at equal angular intervals in the circumferential direction. The drive device according to any one of claims 1 to 4,
The driving device according to claim 1, wherein the first claw portions are formed at equal angular intervals in the circumferential direction. The drive device according to any one of claims 1 to 5,
The drive device according to claim 1, wherein the first claw portion and the second claw portion are alternately formed in a circumferential direction.

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