WO2018193558A1 - Electromagnetic clutch and manufacturing method therefor - Google Patents

Electromagnetic clutch and manufacturing method therefor Download PDF

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Publication number
WO2018193558A1
WO2018193558A1 PCT/JP2017/015748 JP2017015748W WO2018193558A1 WO 2018193558 A1 WO2018193558 A1 WO 2018193558A1 JP 2017015748 W JP2017015748 W JP 2017015748W WO 2018193558 A1 WO2018193558 A1 WO 2018193558A1
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WO
WIPO (PCT)
Prior art keywords
winding
bobbin
electromagnetic clutch
convex portion
body portion
Prior art date
Application number
PCT/JP2017/015748
Other languages
French (fr)
Japanese (ja)
Inventor
正徳 茂木
進治 横澤
Original Assignee
株式会社アールアンドエス
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社アールアンドエス filed Critical 株式会社アールアンドエス
Priority to PCT/JP2017/015748 priority Critical patent/WO2018193558A1/en
Priority to JP2019513145A priority patent/JPWO2018193558A1/en
Priority to CN201780001873.6A priority patent/CN109121428B/en
Publication of WO2018193558A1 publication Critical patent/WO2018193558A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D27/00—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor
    • F16D27/10—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings

Definitions

  • the present invention relates to an electromagnetic clutch and a manufacturing method thereof, and more particularly, to an electromagnetic clutch in which windings are aligned and wound with respect to a bobbin and a manufacturing method thereof.
  • An electromagnetic clutch is a mechanical mechanism that is disposed between a compressor of an air conditioner and a power source such as an engine and mechanically and intermittently connects the compressor and the power source.
  • This type of electromagnetic clutch mainly includes a rotor with a built-in coil, an armature disposed on the side of the rotor, and a hub that connects the drive shaft and the armature plate.
  • the armature When transmitting power from the power source to the compressor, the armature is attracted to the side of the rotor by the magnetic force generated by supplying power to the coil consisting of the winding wound around the bobbin.
  • the armature and the rotor are drivingly connected via the hub, and the compressor of the air conditioner is operated by the engine.
  • the coil built in the electromagnetic clutch is required to be wound tightly around the bobbin for miniaturization.
  • An invention for winding a winding around a bobbin satisfactorily is described in Patent Document 1, for example.
  • the configuration for the winding described in Patent Document 1 will be described.
  • a line portion is formed at an end portion of a body portion of a bobbin, and a spiral groove for guiding a strand is further provided on the surface of the body portion. Is formed.
  • the filament portion supports the second-stage element wire in a circumscribed state, the winding is stably performed, and it is possible to prevent displacement and collapse. .
  • the winding diameter includes a certain degree of tolerance, if the thin linear part constitutes the first stage winding, it is between the windings or between the winding and the bobbin side wall. There is a problem that the winding of the second stage falls and the winding cannot be densely wound due to the occurrence of winding collapse.
  • the present invention has been made in view of the above circumstances, and an object of the present invention is to provide an electromagnetic clutch having a configuration in which windings are wound around a bobbin in a densely aligned state and a method for manufacturing the electromagnetic clutch. It is to provide.
  • the electromagnetic clutch according to the present invention includes a rotor, an armature that is disposed on an axial side of the rotor, and is attracted to a side surface of the rotor by a magnetic field, and a magnetic field that generates the magnetic field that attracts the armature to the rotor by excitation.
  • the magnetic field generation unit includes a bobbin and a winding wound around the bobbin, and the bobbin has a cylindrical or substantially cylindrical body part, and the body part.
  • a first flange portion extending in the shape of a wall from the axial end portion side of the one side toward the radially outer side, and a first flange portion extending in the shape of a wall from the axial end portion side of the other side of the body portion toward the radially outer side.
  • 2 flange portions, a slit formed in the first flange portion, and an incomplete annular convex portion in which an end portion on the one side of the outer surface of the body portion protrudes radially outward.
  • the convex has a forward-side end and a reverse-side end along the winding direction of the winding, and the forward-side end is disposed on the forward side, spaced from the slit. It is characterized by being.
  • the axial width of the convex portion is half or substantially half of the diameter of the winding, and the most other side of the winding of the first layer to be wound The winding disposed in contact with the second flange portion.
  • a housing convex portion that is in contact with the winding of the first layer is formed along the winding direction on the outer peripheral surface of the body portion of the bobbin, and the housing convex portion is The inclination angle inclined from the outer peripheral surface of the body part is 45 degrees or more and 60 degrees or less.
  • the present invention is an electromagnetic clutch manufacturing method including a step of forming a magnetic field generating unit by winding and winding a bobbin, wherein the bobbin includes a cylindrical or substantially cylindrical body part, and a body part of the body part. A first flange portion extending in a wall shape from the axial end portion side of one side toward the radially outer side, and a second flange portion extending in a wall shape from the axial end portion side of the other side of the body portion toward the radially outer side.
  • the convex part has a forward-side end and a reverse-side end along the winding direction of the winding, and the forward-side end of the convex part is separated from the slit. Arranged on the forward direction side and winding the winding around the bobbin When doing so, while contact with said winding involving the bobbin from the slit in the convex portion, and wherein the winding on the body portion of the bobbin.
  • the winding when winding the winding around the body portion, the winding is supplied to the rotating bobbin via a nozzle, and the body portion is subjected to the above-described winding.
  • the nozzle When the direction perpendicular to the tangential direction of the winding start portion where the winding starts to be wound and the direction away from the bobbin is the first direction, and the direction opposite to the first direction is the second direction, the nozzle is The winding is arranged on the second direction side of the winding start portion of the body portion of the bobbin where winding of the winding starts.
  • the nozzle is disposed on the second direction side of the body portion of the bobbin where the winding of the winding starts, and from the center of the body portion. Is also arranged on the first direction side.
  • the electromagnetic clutch according to the present invention includes a rotor, an armature that is disposed on an axial side of the rotor, and is attracted to a side surface of the rotor by a magnetic field, and a magnetic field that generates the magnetic field that attracts the armature to the rotor by excitation.
  • the magnetic field generation unit includes a bobbin and a winding wound around the bobbin, and the bobbin has a cylindrical or substantially cylindrical body part, and the body part.
  • a first flange portion extending in the shape of a wall from the axial end portion side of the one side toward the radially outer side, and a first flange portion extending in the shape of a wall from the axial end portion side of the other side of the body portion toward the radially outer side.
  • 2 flange portions, a slit formed in the first flange portion, and an incomplete annular convex portion in which an end portion on the one side of the outer surface of the body portion protrudes radially outward.
  • the convex has a forward-side end and a reverse-side end along the winding direction of the winding, and the forward-side end is disposed on the forward side, spaced from the slit. It is characterized by being.
  • the windings are aligned and wound around the bobbin, so that the number of turns of the winding is ensured more than a fixed value and the bobbin is downsized.
  • the winding of the winding wound around the bobbin from the slit of the first flange portion is effectively arranged at a predetermined position at the convex portion, so that the first layer winding is accurately wound around the bobbin. can do.
  • the degree of bending of the winding start portion of the winding can be reduced. Therefore, by winding the second and subsequent windings on the upper layer of the first winding wound exactly as designed, all the windings can be wound exactly as designed. Can do.
  • the axial width of the convex portion is half or substantially half of the diameter of the winding, and the most other side of the winding of the first layer to be wound The winding disposed in contact with the second flange portion. Accordingly, the second layer winding can be easily wound between the first layer windings, and the second and subsequent windings can be accurately wound.
  • a housing convex portion that is in contact with the winding of the first layer is formed along the winding direction on the outer peripheral surface of the body portion of the bobbin, and the housing convex portion is The inclination angle inclined from the outer peripheral surface of the body part is 45 degrees or more and 60 degrees or less. Accordingly, the first layer winding can be wound around a predetermined location by the storage convex portion coming into contact with the surface of the first layer winding. Further, when the inclination angle of the storage convex portion is 45 degrees or more, the pressure acting when the second layer winding is wound is received by the storage convex portion, and the second layer winding is moved from a predetermined position. It can prevent coming off. Moreover, when the inclination angle of the storage convex portion is 60 degrees or less, when the bobbin is molded by injection molding, the mold releasability between the molding die and the bobbin can be ensured satisfactorily.
  • the present invention is an electromagnetic clutch manufacturing method including a step of forming a magnetic field generating unit by winding and winding a bobbin, wherein the bobbin includes a cylindrical or substantially cylindrical body part, and a body part of the body part. A first flange portion extending in a wall shape from the axial end portion side of one side toward the radially outer side, and a second flange portion extending in a wall shape from the axial end portion side of the other side of the body portion toward the radially outer side.
  • the convex part has a forward-side end and a reverse-side end along the winding direction of the winding, and the forward-side end of the convex part is separated from the slit. Arranged on the forward direction side and winding the winding around the bobbin When doing so, while contact with said winding involving the bobbin from the slit in the convex portion, and wherein the winding on the body portion of the bobbin.
  • the winding of the winding wound inside the bobbin from the slit of the first flange portion is arranged at a predetermined position effectively at the convex portion, so that the first layer winding is accurately wound around the bobbin. can do. Therefore, by winding the second and subsequent windings on the upper layer of the first winding wound exactly as designed, all the windings can be wound exactly as designed. Can do.
  • the winding when winding the winding around the body portion, the winding is supplied to the rotating bobbin via a nozzle, and the body portion is subjected to the above-described winding.
  • the nozzle When the direction perpendicular to the tangential direction of the winding start portion where the winding starts to be wound and the direction away from the bobbin is the first direction, and the direction opposite to the first direction is the second direction, the nozzle is The winding is arranged on the second direction side of the winding start portion of the body portion of the bobbin where winding of the winding starts.
  • the winding when the winding is pulled out from the nozzle, the winding can be squeezed by the nozzle, and the winding can be supplied to a predetermined portion of the body portion of the bobbin by the pressing force applied to the winding at the time of squeezing. it can.
  • the nozzle is disposed on the second direction side of the body portion of the bobbin where the winding of the winding starts, and from the center of the body portion. Is also arranged on the first direction side. Accordingly, it is possible to prevent the winding from being excessively deformed by the ironing and to prevent the winding of the winding from being disturbed by this deformation. .
  • FIG. 1 It is sectional drawing which shows the electromagnetic clutch which concerns on embodiment of this invention. It is a disassembled perspective view which shows the magnetic field generation unit which comprises the electromagnetic clutch which concerns on embodiment of this invention. It is a figure which shows the electromagnetic clutch which concerns on embodiment of this invention, (A) is a perspective view which shows a bobbin entirely, (B) is an expansion perspective view which shows the principal point. It is a figure which shows the electromagnetic clutch which concerns on embodiment of this invention, (A) is sectional drawing of the bobbin by which the coil
  • FIG. 1 It is a figure which shows the electromagnetic clutch which concerns on embodiment of this invention, (A) is an enlarged view which shows the structure by which a coil
  • the electromagnetic clutch 10 of this embodiment and the manufacturing method thereof will be described with reference to the drawings.
  • the same parts are denoted by the same reference numerals, and redundant description is omitted.
  • the upper, lower, left, and right directions are used.
  • the left and right are the left and right when facing the winding direction, the upper is the radially outer side of the bobbin 21, and the lower is the radially inner side of the bobbin 21. is there.
  • the electromagnetic clutch 10 mainly includes a rotor 11, an armature 12 disposed above the rotor 11, and a magnetic field generation unit 20 (coil) built in the armature 12.
  • the electromagnetic clutch 10 is interposed, for example, between a compressor of an air conditioner (not shown) that performs cooling and heating in a vehicle interior of a vehicle and a power source (not shown) such as an engine, and the compressor and the power source are connected. It has a function of driving and intermittent connection.
  • the electromagnetic clutch 10 drives and connects the compressor and the power source while electric power is supplied from the control device (not shown) to the winding 38 (not shown) of the magnetic field generating unit 20. Due to this, the air conditioner is operated. On the other hand, when the supply of electric power from a control device (not shown) is stopped, the compressor and the power source are separated in a driving manner, whereby the air conditioner stops.
  • the rotor 11 generally has an annular shape, and is configured as an integral part of a pulley that transmits power from a power source via a belt (not shown).
  • the rotor 11 incorporates a magnetic field generation unit 20.
  • the armature 12 is arranged to face the upper side surface of the rotor 11 and is composed of a plurality of annular armature plates. While power is not supplied to the magnetic field generating unit 20 built in the rotor 11, the armature 12 is separated from the upper side surface of the rotor 11 and does not rotate. On the other hand, while electric power is supplied to the magnetic field generating unit 20 of the rotor 11 and excited, the armature 12 is attracted to the upper side surface of the rotor 11 by the magnetic field and rotates together with the rotor 11.
  • a hub 18 is disposed near the central portion of the armature 12, and the hub 18 is drivingly connected to a compressor (not shown) disposed below the rotor 11 via a drive shaft (not shown).
  • the winding 38 is suitably aligned and wound by the magnetic field generation unit 20, so that the magnetic field generation unit 20 generates a large magnetic force with a small volume, Adsorption to the rotor 11 is possible. Therefore, the electromagnetic clutch 10 can be operated efficiently, and further, the electric power required for the operation of the electromagnetic clutch 10 can be reduced.
  • the configuration of the magnetic field generation unit 20 will be described with reference to FIG.
  • the magnetic field generation unit 20 includes a bobbin 21, a winding 38 (not shown) wound around the bobbin 21, a ring 22 that houses the bobbin 21, a winding 38 wound around the bobbin 21, and the outside. And a connector 23 for connecting the two.
  • the lower surface of the ring 22 is covered with a cover made of a steel plate (not shown).
  • the bobbin 21 is made of an injection-molded resin material, and is used for winding a winding 38 (not shown) into a predetermined shape. A plurality of protrusions are formed on the outer side surface of the bobbin 21 to fix a fuse or the like (not shown).
  • the ring 22 is made of a steel plate formed in a substantially ring shape so as to have an internal space in which the bobbin 21 can be accommodated, and has an opening for inserting the bobbin 21 on the upper surface.
  • the connector 23 is fixed to the lower surface of the bobbin 21 and is connected to both ends of a winding 38 (not shown). The lower end of the connector 23 is led downward through an opening (not shown) formed on the lower surface of the ring 22.
  • the inner space of the ring 22 in which the bobbin 21 is accommodated is filled with a resin not shown here.
  • the bobbin 21, the winding 38 (not shown), the ring 22 and the connector 23 form an integrated module, and are built in the rotor 11 shown in FIG. 1 in this state.
  • FIG. 3A is a perspective view showing the bobbin 21 as a whole
  • FIG. 3B is an enlarged perspective view showing the main part of the bobbin 21.
  • the winding direction which is the direction in which the winding 38 is wound, is indicated by an arrow.
  • the bobbin 21 includes a cylindrical or substantially cylindrical body portion 30 having a central axis in the vertical direction, and an axial end portion on one side (here, the upper side) of the body portion 30.
  • a first flange portion 31 extending in a wall shape from the side toward the radially outer side, and a second flange portion extending in a wall shape from the axial end portion side of the other side (here, the lower side) of the body portion 30 toward the radially outer side.
  • the body part 30, the first flange part 31, and the second flange part 32 constituting the bobbin 21 are made of a synthetic resin that is integrally molded by injection molding using a molding die.
  • a winding 38 (not shown) is wound around an inner space surrounded by the outer side surface of the body portion 30, the inner side surface of the first flange portion 31, and the inner side surface of the second flange portion 32.
  • the storage convex portion 37 is formed by projecting the outer side surface of the body portion 30 partially outward in the radial direction along the circumferential direction.
  • the storage convex portion 37 is for contacting the first row of windings 38 from the inside in the radial direction so that the first row of windings 38 are aligned and wound in a predetermined shape.
  • the shape and the like of the storage convex portion 37 will be described later with reference to FIG.
  • the slit 33 is formed by partially notching the first flange portion 31.
  • the slit 33 is formed from the radially outer end of the first flange portion 31 to the radially inner end.
  • the width along the circumferential direction of the slit 33 can lead out one end of the winding 38 from the bobbin 21 to the outside, and can introduce the other end of the winding 38 into the bobbin 21 from the outside. It is said to be long.
  • the side protrusion 24 is formed by protruding the outer side surface of the first flange portion 31 toward the outer side in the axial direction at a position sandwiching the slit 33.
  • the side protrusion 24 is fitted with the connector 23 shown in FIG. 1, whereby the connector 23 is fixed at a predetermined position of the bobbin 21.
  • the convex portion 34 is formed in a portion where the outer side surface of the body portion 30 and the inner side surface of the first flange portion 31 are continuous. As described later, the convex portion 34 has a rectangular or substantially rectangular cross section and is formed in an incomplete ring shape.
  • the convex portion 34 includes a forward side end 35 that is an end disposed in the forward direction with respect to the winding direction, and a reverse side end that is an end disposed in the reverse direction with respect to the winding direction. Part 36.
  • the forward direction of the winding direction is simply referred to as the forward direction
  • the reverse direction of the winding direction is simply referred to as the reverse direction.
  • the width of the convex portion 34 along the axial direction of the bobbin 21 is, for example, half or substantially half of the wound winding 38.
  • the forward side end portion 35 of the convex portion 34 is arranged farther in the forward direction side than the forward direction end portion of the slit 33. In this way, the winding can be smoothly brought into contact with the convex portion 34. Specifically, if the forward end of the slit 33 and the convex portion 34 are made to coincide with each other in the circumferential direction, the slit 33 is moved into the bobbin 21 in the winding winding process. The winding to be introduced is greatly bent at the place where the convex portion 34 is formed, and this bending may disturb the aligned winding.
  • the forward side end portion 35 of the convex portion 34 is arranged farther in the forward direction side than the forward direction end portion of the slit 33.
  • the winding 38 introduced into the bobbin 21 from the slit 33 is gently curved in the forward direction, and then the convex portion 34 It comes to contact
  • the length L5 at which the forward end 35 of the convex portion 34 is separated from the forward end 35 of the slit 33 is, for example, not less than 0.5 mm and not more than 2.0 mm.
  • L5 By setting L5 to 0.5 mm or more, the degree of bending of the portion of the winding 38 that is wound from the slit 33 into the bobbin 21 and contacts the side surface of the convex portion 34 is reduced, and the alignment winding is smoothly performed. I can do it. Further, by setting L5 to 2.0 mm or less, the length of the convex portion 34 is ensured to be long, and the inner side surface of the convex portion 34 is in contact with the winding 38, thereby defining the position of the winding 38. The effect can be increased.
  • the reverse side end 36 of the convex portion 34 is disposed at the same position as the reverse side end of the slit 33 in the circumferential direction.
  • the storage convex portion 37 is formed on the outer surface of the body portion 30 along the winding direction.
  • the storage convex portion 37 extends in parallel to the winding direction.
  • a non-formed part 39 is defined on the outer surface of the body part 30 around the slit 33, and the non-formed part 39 is a smooth surface on which the storage convex part 37 is not formed. Since the storage convex portion 37 is not formed on the non-forming portion 39, when the winding is wound around the bobbin 21, the winding 38 is connected to the opposite end of the storage convex portion 37 at the non-forming portion 39. It is possible to transition from the portion to the forward end of the other storage convex portion 37 adjacent to the storage convex portion 37.
  • FIG. 4A is a cross-sectional view showing a structure in which the winding 38 is wound around the bobbin 21
  • FIG. 4B is a schematic view of the configuration in which the winding 38 is wound as viewed from the outside in the radial direction. is there.
  • the winding 38 is wound around the bobbin 21 in an aligned manner.
  • a winding method for winding the same number of windings 38 across a plurality of stages is generally referred to as the same number winding, but the winding method of the present embodiment is based on the same number of windings, and the first stage.
  • the winding position is adjusted.
  • the first stage is wound from the right end to the left end
  • the second stage is wound from the left end to the right end. Odd-numbered steps are wound toward the left, and even-numbered steps are wound toward the right.
  • a convex portion 34 having a rectangular cross-sectional shape is formed in a portion where the body portion 30 and the first flange portion 31 are continuous.
  • the left side surface of the convex portion 34 is in contact with the right end of the winding 38 ⁇ / b> A that is wound first on the rightmost side of the first stage.
  • the width of the convex portion 34 is half or substantially half the diameter of the winding 38.
  • the left side surface of the convex portion 34 is brought into contact with the right end of the winding 38A that is wound first on the rightmost side of the first stage, whereby the winding 38C wound on the leftmost side of the first stage.
  • the second-stage winding 38 can be arranged at a predetermined location as will be described later. Further, the convex portion 34 is not in contact with the winding 38 wound in the second stage.
  • the winding 38D (winding) wound first in the second stage is disposed above the winding 38C and the winding 38D arranged on the leftmost side of the first stage.
  • the line 38D is indicated by a dotted line).
  • the position of the windings 38B and 38C wound at the end of the first stage is accurately defined.
  • the position of the winding 38D disposed between the winding 38D and the winding 38D can be accurately defined. Therefore, the winding 38 can be entirely wound at a predetermined position, and the winding 38 can be tightly wound.
  • FIG. 5A is a cross-sectional view showing a winding configuration according to this embodiment
  • FIG. 5B is a cross-sectional view showing a winding configuration of a comparative example.
  • the first-stage windings 38B and 38C are arranged so as to be brought into close contact with the second flange portion 32 side. Accordingly, the winding 38D, which is the first winding 38 on the two-step surface, is disposed between the winding 38B and the winding 38C.
  • the mechanical mechanism and operation include certain tolerances, so that the two-step winding 38D is wound. It is conceivable that the position of the position shifts to the left or right.
  • the allowable length of deviation of the center position P12 of the winding 38D in the left-right direction. Can be between the center position P11 of the winding 38B and the center position P12 of the winding 38C.
  • the distance L2 between the center position P11 of the winding 38B and the center position P10 of the winding 38C is equal to the diameter of the winding 38B and the like, and is sufficiently wide. That is, the winding 38 ⁇ / b> D is allowed to shift leftward to the position indicated by the dotted line and allowed to shift rightward to the position indicated by the alternate long and short dash line. Therefore, even if the position where the winding 38D is wound is slightly deviated, the winding 38D can be prevented from coming off between the winding 38B and the winding 38C.
  • a comparative example will be described with reference to FIG.
  • the winding 38C disposed at the left end of the first stage is wound away from the second flange portion 32, the winding 38D wound at the left end of the second stage is wound in the left-right direction.
  • 38C and the 2nd flange part 32 will be arrange
  • the allowable length in which the deviation of the winding 38D is allowed is a short width L3 from the center position P10 of the winding 38C to the center position P12 of the winding 38D.
  • L3 is equivalent to the radius of the winding 38C. Therefore, in the case of this comparative example, when the position where the winding 38D is wound is shifted (for example, when the winding 38D is shifted to a position indicated by a dotted line), the winding 38D is connected to the winding 38C and the second flange portion. There is a high risk that it will be out of the range.
  • a housing convex portion 37 is formed on the outer side surface of the body portion 30 of the bobbin 21 along the circumferential direction.
  • the storage convex portion 37 is formed corresponding to each winding 38 and has a triangular cross section.
  • three storage convex portions 37 are shown, and the windings 38E and 38F in the first row are stored between the storage convex portions 37.
  • the windings 38 ⁇ / b> E and 38 ⁇ / b> F are in contact with the inclined surfaces of the storage convex portion 37 at the lower portions on both the left and right sides.
  • a second row of windings 38G is wound above the windings 38E and 38F.
  • the storage convex portion 37 has a shape protruding outward from the surface of the body portion 30 in a triangular shape, and the inclination angle ⁇ at which the inclined surface of the storage convex portion 37 is inclined from the surface of the body portion 30 is, for example, It is 45 degrees or more and 60 degrees or less.
  • the second winding 38G can be stably supported by the storage convex portion 37.
  • the point where the weight of the winding 38E in the first row acts on the storage convex portion 37 is P20
  • the point where the weight of the winding 38F in the second row acts on the storage convex portion 37 is P21.
  • P21 can be set to the end side of the storage convex portion 37 with respect to P20.
  • P21 may be disposed inside the triangular region with respect to P20. This makes it possible to stably support the second row of windings 38G on the slope of the storage convex portion 37 via the windings 38F and 38E.
  • the inclination angle ⁇ of the slope of the storage convex portion 37 is 60 degrees or less, when the bobbin 21 having the storage convex portion 37 is injection-molded, the releasability between the bobbin 21 and the molding die is good. Can be.
  • FIG. 7 a method for manufacturing the electromagnetic clutch having the configuration shown in FIG. 1 will be described.
  • a process of winding the winding 38 around the bobbin 21 is shown
  • FIG. 7A is a side view showing the winding process
  • FIG. 7B is a configuration of the nozzle 40 used for the winding.
  • the winding 38 fed out from the nozzle 40 is wound around the body 30 of the bobbin 21 while the bobbin 21 is rotated counterclockwise on the paper surface at a predetermined speed.
  • the nozzle 40 reciprocates along the axial direction of the bobbin 21 while feeding the winding 38 to the bobbin 21.
  • the nozzle 40 reciprocates along a direction that penetrates the paper surface vertically.
  • the winding 38 introduced from the slit 33 to the bobbin 21 is first wound while being in contact with the left side surface of the convex portion 34. Thereby, the winding 38 of the first stage is suitably wound around a predetermined location.
  • the nozzle 40 has a cylindrical shape, and the inner diameter of the nozzle 40 is formed larger than the winding 38.
  • a copper wire made of copper or an aluminum wire made of aluminum can be adopted.
  • an aluminum wire is adopted as the winding 38, it is necessary to suitably adjust the tensile strength applied to the winding 38 during winding because aluminum is a material that is more easily deformed than copper.
  • the winding 38 is formed of a metal wire made of copper or aluminum, a polyester film and a slipping film covering the periphery of the metal wire.
  • the surface of the winding 38 has a friction coefficient of 0.45 to 0.55 or less in order to ensure slipperiness during winding.
  • the relative position between the nozzle 40 and the bobbin 21 is such that the winding 38 can be wound around a predetermined portion of the bobbin 21 and excessive deformation of the winding 38 can be suppressed.
  • a winding start portion where the winding 38 starts to be wound around the body portion 30 of the bobbin 21 is defined as P30.
  • the direction facing the first direction is the second direction.
  • the upper direction is the first direction and the lower direction is the second direction.
  • the position of the nozzle 40 is set to the second direction side from the winding start portion P30 of the bobbin 21 (the lower side on the paper surface).
  • the winding 38 can be supplied to the bobbin 21 while pushing the upper end of the winding 38 downward at the upper end of the inner wall of the nozzle 40, and the body portion.
  • the winding 38 can be wound around 30 predetermined locations.
  • the position of the nozzle 40 at the time of winding is the second direction side (lower side on the paper surface) with respect to the winding start portion P30 of the bobbin 21, and the body portion 30 of the bobbin 21 It is the first rear side (upper side on the paper surface) from the center position P20.
  • the winding 38 is supplied to the body portion 30 while moving the nozzle 40 along the axial direction of the body portion 30.
  • the nozzle 40 does not precede the position where the winding 38 is wound around the body portion 30.
  • the nozzle 40 traverses behind the position where the winding 38 is wound around the body portion 30.
  • the bobbin 21 around which the winding 38 is wound is stored in the ring 22, the winding 38 and the connector 23 are connected, and resin filling is performed.
  • the magnetic field generation unit 20 is configured. Further, referring to FIG. 1, the electromagnetic clutch 10 is manufactured by incorporating the magnetic field generating unit 20, the rotor 11, and the armature 12 with each other.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
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  • Mechanical Engineering (AREA)
  • Electromagnets (AREA)

Abstract

Provided is an electromagnetic clutch having a structure wherein the winding is wound closely and in an aligned manner on a bobbin; also provided is a method for manufacturing this electromagnetic clutch. This magnetic clutch 10 is equipped with a rotor 11, an armature 12 above the rotor 11, and a magnetic field generation unit 20 embedded in the armature 12. The magnetic field generation unit 20 is equipped with a bobbin 21, winding wound around the periphery of the bobbin 21, and a ring 22 that accommodates the bobbin 21. The bobbin 21 has a body section 30, a first flange section 31, a second flange section 32, a slit 33 formed in the first flange section 31, and an incomplete circular convex region 34 formed as a result of one end portion of the outer surface of the body section 30 protruding outward in the radial direction.

Description

電磁クラッチおよびその製造方法Electromagnetic clutch and manufacturing method thereof
　本発明は、電磁クラッチおよびその製造方法に関し、特に、ボビンに対して巻線が整列巻きされる電磁クラッチおよびその製造方法に関する。 The present invention relates to an electromagnetic clutch and a manufacturing method thereof, and more particularly, to an electromagnetic clutch in which windings are aligned and wound with respect to a bobbin and a manufacturing method thereof.
　電磁クラッチは、空気調和機の圧縮機とエンジン等の動力源との間に配設され、圧縮機と動力源とを機械的に且つ断続的に接続する機械機構である。この種の電磁クラッチは、コイルが内蔵されたロータと、ロータの側方に配置されたアーマチュアと、駆動軸とアーマチュア板とを接続するハブと、を主に備えている。 An electromagnetic clutch is a mechanical mechanism that is disposed between a compressor of an air conditioner and a power source such as an engine and mechanically and intermittently connects the compressor and the power source. This type of electromagnetic clutch mainly includes a rotor with a built-in coil, an armature disposed on the side of the rotor, and a hub that connects the drive shaft and the armature plate.
　動力源から圧縮機に動力を伝達させる際には、ボビンに巻回された巻線から成るコイルに電力を供給することで発生した磁力で、アーマチュアをロータの側面に吸着させる。これにより、アーマチュアとロータとがハブを介して駆動的に連結され、エンジンで空気調和機の圧縮機が運転される。 When transmitting power from the power source to the compressor, the armature is attracted to the side of the rotor by the magnetic force generated by supplying power to the coil consisting of the winding wound around the bobbin. Thus, the armature and the rotor are drivingly connected via the hub, and the compressor of the air conditioner is operated by the engine.
　一方、コイルへの電力の供給を停止すると、上記磁力が消滅してアーマチュアがロータ側面から離れ、アーマチュアとロータとが駆動的に分断される。これにより、空気調和機の圧縮機が停止する。 On the other hand, when the supply of power to the coil is stopped, the magnetic force disappears, the armature is separated from the side surface of the rotor, and the armature and the rotor are separated in a driving manner. Thereby, the compressor of an air conditioner stops.
　電磁クラッチに内蔵されるコイルに於いては、小型化のためにボビンに対して密に巻線を巻回することが要求される。ボビンに巻線を良好に巻回するための発明は、例えば、特許文献１に記載されている。特許文献１に記載された巻線のための構成を説明すると、先ず、ボビンの胴体部の端部に条線部を形成し、更に、素線をガイドするための螺旋溝が胴体部の表面に形成されている。特許文献１に記載された発明によると、条線部が第二段目の素線を外接状態で支持するため、巻回が安定して行われ、位置ずれや巻き崩れを防止することが出来る。 The coil built in the electromagnetic clutch is required to be wound tightly around the bobbin for miniaturization. An invention for winding a winding around a bobbin satisfactorily is described in Patent Document 1, for example. The configuration for the winding described in Patent Document 1 will be described. First, a line portion is formed at an end portion of a body portion of a bobbin, and a spiral groove for guiding a strand is further provided on the surface of the body portion. Is formed. According to the invention described in Patent Document 1, since the filament portion supports the second-stage element wire in a circumscribed state, the winding is stably performed, and it is possible to prevent displacement and collapse. .
特開２０１３－１６６９５号公報JP 2013-16695 A
　しかしながら、特許文献１に記載された発明では、巻線の位置を規定するための上記した条線部は、二段目の素線に接触しているのみである。よって、条線部は、一段目の巻線の位置を規定していないことから、一段目の巻線の位置が設計した場所からずれてしまった場合、一段目の巻線の外側に巻回される二段目以降の巻線の位置もずれてしまい、巻き崩れが発生してしまう恐れがある。 However, in the invention described in Patent Document 1, the above-described line portion for defining the position of the winding is only in contact with the second-stage strand. Therefore, since the position of the first-stage winding does not regulate the position of the first-stage winding, if the position of the first-stage winding deviates from the designed location, the wire is wound outside the first-stage winding. The positions of the second and subsequent windings are also shifted, and there is a risk that winding collapse will occur.
　また、巻線の直径にはある程度の公差が含まれていることから、線形が細い部分が一段目の巻線を構成した場合、巻線どうしの間や、巻線とボビン側壁との間に、二段目の巻線が落ち込んでしまい、巻き崩れが発生しすることで巻線を密に巻回出来なくなってしまう課題があった。 In addition, since the winding diameter includes a certain degree of tolerance, if the thin linear part constitutes the first stage winding, it is between the windings or between the winding and the bobbin side wall. There is a problem that the winding of the second stage falls and the winding cannot be densely wound due to the occurrence of winding collapse.
　更に、電磁クラッチに用いられる通常のコイルに於いては、巻線として銅線が用いられる。ここで、クラッチの軽量化や低コスト化を目的として、巻線としてアルミ線を用いようとすると、アルミ線を巻回する際に強い引っ張り応力を加えることが出来ないことから、上記の課題が顕在化してしまう恐れがある。 Furthermore, in a normal coil used for an electromagnetic clutch, a copper wire is used as a winding. Here, if an attempt is made to use an aluminum wire as a winding for the purpose of reducing the weight and cost of the clutch, it is impossible to apply a strong tensile stress when winding the aluminum wire. There is a risk that it will manifest.
　本発明は、上記の事情に鑑みてなされたものであり、その目的とするところは、巻線が密に且つ整列された状態でボビンに巻回された構成を有する電磁クラッチおよびその製造方法を提供することにある。 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an electromagnetic clutch having a configuration in which windings are wound around a bobbin in a densely aligned state and a method for manufacturing the electromagnetic clutch. It is to provide.
　本発明の電磁クラッチは、ロータと、前記ロータの軸方向側方に配置され、磁界により前記ロータの側面に吸着されるアーマチュアと、前記アーマチュアを前記ロータに吸着する前記磁界を励磁により発生させる磁界発生ユニットと、を具備し、前記磁界発生ユニットは、ボビンと、前記ボビンに巻回された巻線と、を有し、前記ボビンは、円筒形状または略円筒形状の胴体部と、前記胴体部の一方側の軸方向端部側から半径方向外側に向かって壁状に伸びる第１フランジ部と、前記胴体部の他方側の軸方向端部側から半径方向外側に向かって壁状に伸びる第２フランジ部と、前記第１フランジ部に形成したスリットと、前記胴体部の外面の前記一方側の端部を半径方向外側に向かって突出させた不完全環状の凸状部位と、を有し、前記凸状部位は、前記巻線の巻回方向に沿って、順方向側端部と逆方向側端部とを有し、前記順方向側端部は、前記スリットから離間して、順方向側に配置されることを特徴とする。 The electromagnetic clutch according to the present invention includes a rotor, an armature that is disposed on an axial side of the rotor, and is attracted to a side surface of the rotor by a magnetic field, and a magnetic field that generates the magnetic field that attracts the armature to the rotor by excitation. The magnetic field generation unit includes a bobbin and a winding wound around the bobbin, and the bobbin has a cylindrical or substantially cylindrical body part, and the body part. A first flange portion extending in the shape of a wall from the axial end portion side of the one side toward the radially outer side, and a first flange portion extending in the shape of a wall from the axial end portion side of the other side of the body portion toward the radially outer side. 2 flange portions, a slit formed in the first flange portion, and an incomplete annular convex portion in which an end portion on the one side of the outer surface of the body portion protrudes radially outward. The convex The part has a forward-side end and a reverse-side end along the winding direction of the winding, and the forward-side end is disposed on the forward side, spaced from the slit. It is characterized by being.
　また、本発明の電磁クラッチでは、前記凸状部位の軸方向の幅は、前記巻線の直径の半分または略半分であり、巻回される１層目の前記巻線の、最も前記他方側に配置される前記巻線は、前記第２フランジ部に当接することを特徴とする。 In the electromagnetic clutch according to the present invention, the axial width of the convex portion is half or substantially half of the diameter of the winding, and the most other side of the winding of the first layer to be wound The winding disposed in contact with the second flange portion.
　また、本発明の電磁クラッチでは、前記ボビンの前記胴体部の外周面には、１層目の前記巻線に当接する収納凸部が前記巻回方向に沿って形成され、前記収納凸部が前記胴体部の外周面から傾斜する傾斜角は、４５度以上６０度以下であることを特徴とする。 Further, in the electromagnetic clutch according to the present invention, a housing convex portion that is in contact with the winding of the first layer is formed along the winding direction on the outer peripheral surface of the body portion of the bobbin, and the housing convex portion is The inclination angle inclined from the outer peripheral surface of the body part is 45 degrees or more and 60 degrees or less.
　本発明は、ボビンに巻線と巻回することで磁界発生ユニットを構成する工程を有する電磁クラッチの製造方法であり、前記ボビンは、円筒形状または略円筒形状の胴体部と、前記胴体部の一方側の軸方向端部側から半径方向外側に向かって壁状に伸びる第１フランジ部と、前記胴体部の他方側の軸方向端部側から半径方向外側に向かって壁状に伸びる第２フランジ部と、前記第１フランジ部に形成したスリットと、前記胴体部の外面の前記一方側の端部を半径方向外側に向かって突出させた不完全環状の凸状部位と、を有し、前記凸状部位は、前記巻線の巻回方向に沿って順方向側端部と逆方向側端部とを有する共に、前記凸状部位の前記順方向側端部は、前記スリットから離間して、順方向側に配置され、前記ボビンに前記巻線を巻回する際には、前記スリットから前記ボビンに巻き込んだ前記巻線を前記凸状部位に当接させながら、前記ボビンの前記胴体部に巻回することを特徴とする。 The present invention is an electromagnetic clutch manufacturing method including a step of forming a magnetic field generating unit by winding and winding a bobbin, wherein the bobbin includes a cylindrical or substantially cylindrical body part, and a body part of the body part. A first flange portion extending in a wall shape from the axial end portion side of one side toward the radially outer side, and a second flange portion extending in a wall shape from the axial end portion side of the other side of the body portion toward the radially outer side. A flange portion, a slit formed in the first flange portion, and an incomplete annular convex portion projecting the end portion on the one side of the outer surface of the body portion outward in the radial direction; The convex part has a forward-side end and a reverse-side end along the winding direction of the winding, and the forward-side end of the convex part is separated from the slit. Arranged on the forward direction side and winding the winding around the bobbin When doing so, while contact with said winding involving the bobbin from the slit in the convex portion, and wherein the winding on the body portion of the bobbin.
　更に、本発明の電磁クラッチの製造方法では、前記胴体部に前記巻線を巻回する際には、ノズルを経由して、回転する前記ボビンに前記巻線を供給し、前記胴体部に前記巻線が巻回され始める巻回開始部分の接線方向に直交する方向であって前記ボビンから離れる方向を第１方向、前記第１方向に対向する方向を第２方向とした場合、前記ノズルは、前記巻線の巻回が始まる前記ボビンの前記胴体部の前記巻回開始部分よりも、前記第２方向側に配置されることを特徴とする。 Further, in the electromagnetic clutch manufacturing method of the present invention, when winding the winding around the body portion, the winding is supplied to the rotating bobbin via a nozzle, and the body portion is subjected to the above-described winding. When the direction perpendicular to the tangential direction of the winding start portion where the winding starts to be wound and the direction away from the bobbin is the first direction, and the direction opposite to the first direction is the second direction, the nozzle is The winding is arranged on the second direction side of the winding start portion of the body portion of the bobbin where winding of the winding starts.
　更に、本発明の電磁クラッチの製造方法では、前記ノズルは、前記巻線の巻回が始まる前記ボビンの前記胴体部よりも、前記第２方向側に配置され、且つ、前記胴体部の中心よりも前記第１方向側に配置されることを特徴とする。 Further, in the electromagnetic clutch manufacturing method of the present invention, the nozzle is disposed on the second direction side of the body portion of the bobbin where the winding of the winding starts, and from the center of the body portion. Is also arranged on the first direction side.
　本発明の電磁クラッチは、ロータと、前記ロータの軸方向側方に配置され、磁界により前記ロータの側面に吸着されるアーマチュアと、前記アーマチュアを前記ロータに吸着する前記磁界を励磁により発生させる磁界発生ユニットと、を具備し、前記磁界発生ユニットは、ボビンと、前記ボビンに巻回された巻線と、を有し、前記ボビンは、円筒形状または略円筒形状の胴体部と、前記胴体部の一方側の軸方向端部側から半径方向外側に向かって壁状に伸びる第１フランジ部と、前記胴体部の他方側の軸方向端部側から半径方向外側に向かって壁状に伸びる第２フランジ部と、前記第１フランジ部に形成したスリットと、前記胴体部の外面の前記一方側の端部を半径方向外側に向かって突出させた不完全環状の凸状部位と、を有し、前記凸状部位は、前記巻線の巻回方向に沿って、順方向側端部と逆方向側端部とを有し、前記順方向側端部は、前記スリットから離間して、順方向側に配置されることを特徴とする。従って、本発明では、ボビンに巻線を整列巻きすることで、巻線の巻回数を一定以上に確保すると共に、ボビンの小型化を図っているが、ボビンに巻線を巻回する初期段階にて、第１フランジ部のスリットからボビンの内部に巻き込まれる巻線の位置を、凸状部位で効果的に所定箇所に配置することで、１層目の巻線をボビンに正確に巻回することができる。更に、凸状部位の順方向側端部をスリットから離間させることで、巻線の巻き始めの部分が曲折する度合いを緩和することが出来る。よって、正確に設計通りに巻回された１層目の巻線の上層に２層目以降の巻線を巻回することで、全ての層の巻線を正確に設計通りに巻回することができる。 The electromagnetic clutch according to the present invention includes a rotor, an armature that is disposed on an axial side of the rotor, and is attracted to a side surface of the rotor by a magnetic field, and a magnetic field that generates the magnetic field that attracts the armature to the rotor by excitation. The magnetic field generation unit includes a bobbin and a winding wound around the bobbin, and the bobbin has a cylindrical or substantially cylindrical body part, and the body part. A first flange portion extending in the shape of a wall from the axial end portion side of the one side toward the radially outer side, and a first flange portion extending in the shape of a wall from the axial end portion side of the other side of the body portion toward the radially outer side. 2 flange portions, a slit formed in the first flange portion, and an incomplete annular convex portion in which an end portion on the one side of the outer surface of the body portion protrudes radially outward. The convex The part has a forward-side end and a reverse-side end along the winding direction of the winding, and the forward-side end is disposed on the forward side, spaced from the slit. It is characterized by being. Accordingly, in the present invention, the windings are aligned and wound around the bobbin, so that the number of turns of the winding is ensured more than a fixed value and the bobbin is downsized. Thus, the winding of the winding wound around the bobbin from the slit of the first flange portion is effectively arranged at a predetermined position at the convex portion, so that the first layer winding is accurately wound around the bobbin. can do. Further, by separating the forward end of the convex portion from the slit, the degree of bending of the winding start portion of the winding can be reduced. Therefore, by winding the second and subsequent windings on the upper layer of the first winding wound exactly as designed, all the windings can be wound exactly as designed. Can do.
　また、本発明の電磁クラッチでは、前記凸状部位の軸方向の幅は、前記巻線の直径の半分または略半分であり、巻回される１層目の前記巻線の、最も前記他方側に配置される前記巻線は、前記第２フランジ部に当接することを特徴とする。従って、２層目の巻線を、１層目の巻線どうしの間に容易に巻回することができ、２層目以降の巻線を正確に巻回することができる。 In the electromagnetic clutch according to the present invention, the axial width of the convex portion is half or substantially half of the diameter of the winding, and the most other side of the winding of the first layer to be wound The winding disposed in contact with the second flange portion. Accordingly, the second layer winding can be easily wound between the first layer windings, and the second and subsequent windings can be accurately wound.
　また、本発明の電磁クラッチでは、前記ボビンの前記胴体部の外周面には、１層目の前記巻線に当接する収納凸部が前記巻回方向に沿って形成され、前記収納凸部が前記胴体部の外周面から傾斜する傾斜角は、４５度以上６０度以下であることを特徴とする。従って、収納凸部が１層目の巻線の表面に当接することで、１層目の巻線を所定箇所に巻回することができる。また、収納凸部の傾斜角が４５度以上であることで、２層目の巻線が巻回される際に作用する圧力を収納凸部で受け止め、２層目の巻線が所定位置から外れてしまうことを防止できる。また、収納凸部の傾斜角が６０度以下であることで、射出成形でボビンを成型する際に、成型金型とボビンとの離型性を良好に確保することができる。 Further, in the electromagnetic clutch according to the present invention, a housing convex portion that is in contact with the winding of the first layer is formed along the winding direction on the outer peripheral surface of the body portion of the bobbin, and the housing convex portion is The inclination angle inclined from the outer peripheral surface of the body part is 45 degrees or more and 60 degrees or less. Accordingly, the first layer winding can be wound around a predetermined location by the storage convex portion coming into contact with the surface of the first layer winding. Further, when the inclination angle of the storage convex portion is 45 degrees or more, the pressure acting when the second layer winding is wound is received by the storage convex portion, and the second layer winding is moved from a predetermined position. It can prevent coming off. Moreover, when the inclination angle of the storage convex portion is 60 degrees or less, when the bobbin is molded by injection molding, the mold releasability between the molding die and the bobbin can be ensured satisfactorily.
　本発明は、ボビンに巻線と巻回することで磁界発生ユニットを構成する工程を有する電磁クラッチの製造方法であり、前記ボビンは、円筒形状または略円筒形状の胴体部と、前記胴体部の一方側の軸方向端部側から半径方向外側に向かって壁状に伸びる第１フランジ部と、前記胴体部の他方側の軸方向端部側から半径方向外側に向かって壁状に伸びる第２フランジ部と、前記第１フランジ部に形成したスリットと、前記胴体部の外面の前記一方側の端部を半径方向外側に向かって突出させた不完全環状の凸状部位と、を有し、前記凸状部位は、前記巻線の巻回方向に沿って順方向側端部と逆方向側端部とを有する共に、前記凸状部位の前記順方向側端部は、前記スリットから離間して、順方向側に配置され、前記ボビンに前記巻線を巻回する際には、前記スリットから前記ボビンに巻き込んだ前記巻線を前記凸状部位に当接させながら、前記ボビンの前記胴体部に巻回することを特徴とする。従って、第１フランジ部のスリットからボビンの内部に巻き込まれた巻線の位置を、凸状部位で効果的に所定箇所に配置することで、１層目の巻線をボビンに正確に巻回することができる。よって、正確に設計通りに巻回された１層目の巻線の上層に２層目以降の巻線を巻回することで、全ての層の巻線を正確に設計通りに巻回することができる。 The present invention is an electromagnetic clutch manufacturing method including a step of forming a magnetic field generating unit by winding and winding a bobbin, wherein the bobbin includes a cylindrical or substantially cylindrical body part, and a body part of the body part. A first flange portion extending in a wall shape from the axial end portion side of one side toward the radially outer side, and a second flange portion extending in a wall shape from the axial end portion side of the other side of the body portion toward the radially outer side. A flange portion, a slit formed in the first flange portion, and an incomplete annular convex portion projecting the end portion on the one side of the outer surface of the body portion outward in the radial direction; The convex part has a forward-side end and a reverse-side end along the winding direction of the winding, and the forward-side end of the convex part is separated from the slit. Arranged on the forward direction side and winding the winding around the bobbin When doing so, while contact with said winding involving the bobbin from the slit in the convex portion, and wherein the winding on the body portion of the bobbin. Therefore, the winding of the winding wound inside the bobbin from the slit of the first flange portion is arranged at a predetermined position effectively at the convex portion, so that the first layer winding is accurately wound around the bobbin. can do. Therefore, by winding the second and subsequent windings on the upper layer of the first winding wound exactly as designed, all the windings can be wound exactly as designed. Can do.
　更に、本発明の電磁クラッチの製造方法では、前記胴体部に前記巻線を巻回する際には、ノズルを経由して、回転する前記ボビンに前記巻線を供給し、前記胴体部に前記巻線が巻回され始める巻回開始部分の接線方向に直交する方向であって前記ボビンから離れる方向を第１方向、前記第１方向に対向する方向を第２方向とした場合、前記ノズルは、前記巻線の巻回が始まる前記ボビンの前記胴体部の前記巻回開始部分よりも、前記第２方向側に配置されることを特徴とする。従って、ノズルから巻線が引き出される際にノズルで巻線をしごくことができ、このしごく際に巻線に付与される押圧力で、ボビンの胴体部の所定箇所に巻線を供給することができる。 Further, in the electromagnetic clutch manufacturing method of the present invention, when winding the winding around the body portion, the winding is supplied to the rotating bobbin via a nozzle, and the body portion is subjected to the above-described winding. When the direction perpendicular to the tangential direction of the winding start portion where the winding starts to be wound and the direction away from the bobbin is the first direction, and the direction opposite to the first direction is the second direction, the nozzle is The winding is arranged on the second direction side of the winding start portion of the body portion of the bobbin where winding of the winding starts. Accordingly, when the winding is pulled out from the nozzle, the winding can be squeezed by the nozzle, and the winding can be supplied to a predetermined portion of the body portion of the bobbin by the pressing force applied to the winding at the time of squeezing. it can.
　更に、本発明の電磁クラッチの製造方法では、前記ノズルは、前記巻線の巻回が始まる前記ボビンの前記胴体部よりも、前記第２方向側に配置され、且つ、前記胴体部の中心よりも前記第１方向側に配置されることを特徴とする。従って、ノズルが巻線をしごく程度を適当なものとし、このしごきにより巻線が過度に変形することを抑制し、この変形により巻線の整列巻きが乱されてしまうことを防止することができる。 Further, in the electromagnetic clutch manufacturing method of the present invention, the nozzle is disposed on the second direction side of the body portion of the bobbin where the winding of the winding starts, and from the center of the body portion. Is also arranged on the first direction side. Accordingly, it is possible to prevent the winding from being excessively deformed by the ironing and to prevent the winding of the winding from being disturbed by this deformation. .
本発明の実施形態に係る電磁クラッチを示す断面図である。It is sectional drawing which shows the electromagnetic clutch which concerns on embodiment of this invention. 本発明の実施形態に係る電磁クラッチを構成する磁界発生ユニットを示す分解斜視図である。It is a disassembled perspective view which shows the magnetic field generation unit which comprises the electromagnetic clutch which concerns on embodiment of this invention. 本発明の実施形態に係る電磁クラッチを示す図であり、（Ａ）はボビンを全体的に示す斜視図であり、（Ｂ）はその要所を示す拡大斜視図である。It is a figure which shows the electromagnetic clutch which concerns on embodiment of this invention, (A) is a perspective view which shows a bobbin entirely, (B) is an expansion perspective view which shows the principal point. 本発明の実施形態に係る電磁クラッチを示す図であり、（Ａ）は巻線が巻回されたボビンの断面図であり、（Ｂ）はボビンに巻線が巻回される構成を示す模式図である。It is a figure which shows the electromagnetic clutch which concerns on embodiment of this invention, (A) is sectional drawing of the bobbin by which the coil | winding was wound, (B) is a model which shows the structure by which a coil | winding is wound around a bobbin. FIG. 本発明の実施形態に係る電磁クラッチを示す図であり、（Ａ）はボビンに巻線が巻回される構成を示す拡大図であり、（Ｂ）は比較例を示す拡大図である。It is a figure which shows the electromagnetic clutch which concerns on embodiment of this invention, (A) is an enlarged view which shows the structure by which a coil | winding is wound around a bobbin, (B) is an enlarged view which shows a comparative example. 本発明の実施形態に係る電磁クラッチを示す図であり、ボビンに巻線が巻回される構成を示す拡大図である。It is a figure which shows the electromagnetic clutch which concerns on embodiment of this invention, and is an enlarged view which shows the structure by which a coil | winding is wound around a bobbin. 本発明の実施形態に係る電磁クラッチの製造方法を示す図であり、（Ａ）はボビンに巻線を巻回する工程を示す側面図であり、（Ｂ）はノズルの形状等を示す図である。It is a figure which shows the manufacturing method of the electromagnetic clutch which concerns on embodiment of this invention, (A) is a side view which shows the process of winding a coil | winding to a bobbin, (B) is a figure which shows the shape of a nozzle, etc. is there.
　以下、図を参照して本形態の電磁クラッチ１０およびその製造方法を説明する。以下の説明では、同一の部位には同一の符号を付し、重複する説明は省略する。以下の説明では上下左右の各方向を用いるが、左右とは巻回方向に対峙した場合の左右であり、上方とはボビン２１の半径方向外側であり、下方とはボビン２１の半径方向内側である。 Hereinafter, the electromagnetic clutch 10 of this embodiment and the manufacturing method thereof will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals, and redundant description is omitted. In the following description, the upper, lower, left, and right directions are used. The left and right are the left and right when facing the winding direction, the upper is the radially outer side of the bobbin 21, and the lower is the radially inner side of the bobbin 21. is there.
　図１の断面図を参照して、本形態の電磁クラッチ１０の概略構成を説明する。電磁クラッチ１０は、ロータ１１と、ロータ１１の上方に配設されたアーマチュア１２と、アーマチュア１２に内蔵された磁界発生ユニット２０（コイル）と、を主要に有している。 A schematic configuration of the electromagnetic clutch 10 of the present embodiment will be described with reference to a cross-sectional view of FIG. The electromagnetic clutch 10 mainly includes a rotor 11, an armature 12 disposed above the rotor 11, and a magnetic field generation unit 20 (coil) built in the armature 12.
　電磁クラッチ１０は、例えば、車両の車室内における冷暖房を行う空気調和機（不図示）の圧縮機とエンジン等の動力源（不図示）との間に介装され、圧縮機と動力源とを駆動的に且つ断続的に接続する機能を有する。また、電磁クラッチ１０は、制御装置（不図示）から磁界発生ユニット２０の巻線３８（不図示）に電力が供給されている間は、圧縮機と動力源とを駆動的に接続し、これにより空気調和機が運転される。一方、図示しない制御装置からの電力の供給が停止されると、圧縮機と動力源とは駆動的に分断され、これにより空気調和機が停止する。 The electromagnetic clutch 10 is interposed, for example, between a compressor of an air conditioner (not shown) that performs cooling and heating in a vehicle interior of a vehicle and a power source (not shown) such as an engine, and the compressor and the power source are connected. It has a function of driving and intermittent connection. The electromagnetic clutch 10 drives and connects the compressor and the power source while electric power is supplied from the control device (not shown) to the winding 38 (not shown) of the magnetic field generating unit 20. Due to this, the air conditioner is operated. On the other hand, when the supply of electric power from a control device (not shown) is stopped, the compressor and the power source are separated in a driving manner, whereby the air conditioner stops.
　ロータ１１は、概略的に環状形状を呈しており、ここでは図示しないベルトを介して動力源から動力が伝達されるプーリと一体物として構成されている。ロータ１１には、磁界発生ユニット２０が内蔵されている。 The rotor 11 generally has an annular shape, and is configured as an integral part of a pulley that transmits power from a power source via a belt (not shown). The rotor 11 incorporates a magnetic field generation unit 20.
　アーマチュア１２は、ロータ１１の上方側面に対向して配置され、円環状の複数のアーマチュア板から構成される。ロータ１１に内蔵された磁界発生ユニット２０に電力が供給されていない間は、アーマチュア１２は、ロータ１１の上方側面から離間しており、回転しない。一方、ロータ１１の磁界発生ユニット２０に電力が供給されて励磁している間は、アーマチュア１２は、磁界によりロータ１１の上方側面に吸着されており、ロータ１１と共に回転する。 The armature 12 is arranged to face the upper side surface of the rotor 11 and is composed of a plurality of annular armature plates. While power is not supplied to the magnetic field generating unit 20 built in the rotor 11, the armature 12 is separated from the upper side surface of the rotor 11 and does not rotate. On the other hand, while electric power is supplied to the magnetic field generating unit 20 of the rotor 11 and excited, the armature 12 is attracted to the upper side surface of the rotor 11 by the magnetic field and rotates together with the rotor 11.
　アーマチュア１２の中央部付近にはハブ１８が配置されており、ハブ１８は、図示しない駆動軸を介して、ロータ１１の下方側に配置される図示しない圧縮機と駆動的に接続されている。 A hub 18 is disposed near the central portion of the armature 12, and the hub 18 is drivingly connected to a compressor (not shown) disposed below the rotor 11 via a drive shaft (not shown).
　後述するように、本形態の電磁クラッチ１０では、磁界発生ユニット２０にて巻線３８を好適に整列巻きしていることから、磁界発生ユニット２０は小さな容積で大きな磁力を発生させ、アーマチュア１２をロータ１１に好適に吸着することが出来る。よって、電磁クラッチ１０を効率的に運転することができ、更に、電磁クラッチ１０の運転に要する電力を削減することができる。 As will be described later, in the electromagnetic clutch 10 of this embodiment, the winding 38 is suitably aligned and wound by the magnetic field generation unit 20, so that the magnetic field generation unit 20 generates a large magnetic force with a small volume, Adsorption to the rotor 11 is possible. Therefore, the electromagnetic clutch 10 can be operated efficiently, and further, the electric power required for the operation of the electromagnetic clutch 10 can be reduced.
　図２を参照して、上記した磁界発生ユニット２０の構成を説明する。磁界発生ユニット２０は、ボビン２１と、ボビン２１の周囲に巻回されるここでは図示しない巻線３８と、ボビン２１を収納するリング２２と、ボビン２１に巻回される巻線３８と外部とを接続するコネクタ２３と、を具備する。なお、リング２２の下面は、ここでは図示しない鋼板から成るカバーで被覆されている。 The configuration of the magnetic field generation unit 20 will be described with reference to FIG. The magnetic field generation unit 20 includes a bobbin 21, a winding 38 (not shown) wound around the bobbin 21, a ring 22 that houses the bobbin 21, a winding 38 wound around the bobbin 21, and the outside. And a connector 23 for connecting the two. The lower surface of the ring 22 is covered with a cover made of a steel plate (not shown).
　ボビン２１は、射出成形された樹脂材料から成り、ここでは図示しない巻線３８を所定形状に巻回させるためのものである。また、ボビン２１の外側側面には、図示しないヒューズ等を固定するために突出部が複数形成されている。 The bobbin 21 is made of an injection-molded resin material, and is used for winding a winding 38 (not shown) into a predetermined shape. A plurality of protrusions are formed on the outer side surface of the bobbin 21 to fix a fuse or the like (not shown).
　リング２２は、ボビン２１を収容可能な内部空間を有するように、略リング状に形成された鋼板から成り、ボビン２１を挿入するための開口を上面に有する。 The ring 22 is made of a steel plate formed in a substantially ring shape so as to have an internal space in which the bobbin 21 can be accommodated, and has an opening for inserting the bobbin 21 on the upper surface.
　コネクタ２３は、ボビン２１の下面に固定されると共に、図示しない巻線３８の両端部が接続される。コネクタ２３の下端は、リング２２の下面に形成された図示しない開口を経由して、下方に導出する。 The connector 23 is fixed to the lower surface of the bobbin 21 and is connected to both ends of a winding 38 (not shown). The lower end of the connector 23 is led downward through an opening (not shown) formed on the lower surface of the ring 22.
　ボビン２１が収容されたリング２２の内部空間には、ここでは図示しない樹脂が充填される。このようにすることで、ボビン２１、図示しない巻線３８、リング２２およびコネクタ２３は、一体化されたモジュールと成り、この状態で図１に示したロータ１１に内蔵される。 The inner space of the ring 22 in which the bobbin 21 is accommodated is filled with a resin not shown here. By doing so, the bobbin 21, the winding 38 (not shown), the ring 22 and the connector 23 form an integrated module, and are built in the rotor 11 shown in FIG. 1 in this state.
　図３を参照して、ボビン２１の構成を説明する。図３（Ａ）はボビン２１を全体的に示す斜視図であり、図３（Ｂ）はボビン２１の要所を拡大して示す斜視図である。また、図３（Ｂ）に於いては、巻線３８が巻回される方向である巻回方向を矢印で示している。 The configuration of the bobbin 21 will be described with reference to FIG. FIG. 3A is a perspective view showing the bobbin 21 as a whole, and FIG. 3B is an enlarged perspective view showing the main part of the bobbin 21. In FIG. 3B, the winding direction, which is the direction in which the winding 38 is wound, is indicated by an arrow.
　図３（Ａ）を参照して、ボビン２１は、上下方向に中心軸を有する円筒状または略円筒状の胴体部３０と、胴体部３０の一方側（ここでは上方側）の軸方向端部側から半径方向外側に向かって壁状に伸びる第１フランジ部３１と、胴体部３０の他方側（ここでは下方側）の軸方向端部側から半径方向外側に向かって壁状に伸びる第２フランジ部３２と、第１フランジ部３１に形成したスリット３３と、胴体部３０の外面の一方側（ここでは上方側）の端部を半径方向外側に向かって突出させた不完全環状の凸状部位３４と、を有している。ボビン２１を構成する胴体部３０、第１フランジ部３１および第２フランジ部３２は、成型金型を用いた射出成形により一体的に成型された合成樹脂から成る。胴体部３０の外側側面、第１フランジ部３１の内側側面、および、第２フランジ部３２の内側側面で囲まれる内部空間に、ここでは図示しない巻線３８が巻回される。 3A, the bobbin 21 includes a cylindrical or substantially cylindrical body portion 30 having a central axis in the vertical direction, and an axial end portion on one side (here, the upper side) of the body portion 30. A first flange portion 31 extending in a wall shape from the side toward the radially outer side, and a second flange portion extending in a wall shape from the axial end portion side of the other side (here, the lower side) of the body portion 30 toward the radially outer side. The flange portion 32, the slit 33 formed in the first flange portion 31, and the incomplete annular convex shape in which the end portion on one side (the upper side here) of the outer surface of the body portion 30 protrudes radially outward. And a portion 34. The body part 30, the first flange part 31, and the second flange part 32 constituting the bobbin 21 are made of a synthetic resin that is integrally molded by injection molding using a molding die. A winding 38 (not shown) is wound around an inner space surrounded by the outer side surface of the body portion 30, the inner side surface of the first flange portion 31, and the inner side surface of the second flange portion 32.
　また、胴体部３０の外側側面を、円周方向に沿って部分的に半径方向外側に向かって突出させることで、収納凸部３７が形成されている。収納凸部３７は、一列目の巻線３８に半径方向内側から接することで、一列目の巻線３８を所定形状に整列巻きさせるためのものである。収納凸部３７の形状等は図６を参照して後述する。 Further, the storage convex portion 37 is formed by projecting the outer side surface of the body portion 30 partially outward in the radial direction along the circumferential direction. The storage convex portion 37 is for contacting the first row of windings 38 from the inside in the radial direction so that the first row of windings 38 are aligned and wound in a predetermined shape. The shape and the like of the storage convex portion 37 will be described later with reference to FIG.
　図３（Ｂ）を参照して、ボビン２１の具体的構成を説明する。先ず、第１フランジ部３１を部分的に切り欠くことでスリット３３が形成されている。スリット３３は、第１フランジ部３１の半径方向外側端部から、半径方向内側端部に至るまで形成されている。スリット３３の円周方向沿いの幅は、ボビン２１から外部に巻線３８の一端を導出することが可能であり、更に、外部からボビン２１に巻線３８の他端を導入することが可能な長さとされている。 The specific configuration of the bobbin 21 will be described with reference to FIG. First, the slit 33 is formed by partially notching the first flange portion 31. The slit 33 is formed from the radially outer end of the first flange portion 31 to the radially inner end. The width along the circumferential direction of the slit 33 can lead out one end of the winding 38 from the bobbin 21 to the outside, and can introduce the other end of the winding 38 into the bobbin 21 from the outside. It is said to be long.
　スリット３３を挟む位置で、第１フランジ部３１の外側側面を軸方向外側に向かって突出させることで側方突出部２４が形成されている。側方突出部２４には図１に示したコネクタ２３が嵌合され、これによりコネクタ２３がボビン２１の所定位置に固定される。 The side protrusion 24 is formed by protruding the outer side surface of the first flange portion 31 toward the outer side in the axial direction at a position sandwiching the slit 33. The side protrusion 24 is fitted with the connector 23 shown in FIG. 1, whereby the connector 23 is fixed at a predetermined position of the bobbin 21.
　凸状部位３４は、胴体部３０の外側側面と、第１フランジ部３１の内側側面とが、連続する部位に形成されている。凸状部位３４は、後述するように、矩形または略矩形の断面を有し、不完全環状に形成されている。凸状部位３４は、巻回方向に対して順方向に配置された端部である順方向側端部３５と、巻回方向に対して逆方向に配置された端部である逆方向側端部３６と、を有している。以下の説明では、巻線方向順方向を単に順方向と称し、巻線方向逆方向を単に逆方向と称する。凸状部位３４の、ボビン２１の軸方向に沿う幅は、例えば、巻回される巻線３８の半分または略半分である。 The convex portion 34 is formed in a portion where the outer side surface of the body portion 30 and the inner side surface of the first flange portion 31 are continuous. As described later, the convex portion 34 has a rectangular or substantially rectangular cross section and is formed in an incomplete ring shape. The convex portion 34 includes a forward side end 35 that is an end disposed in the forward direction with respect to the winding direction, and a reverse side end that is an end disposed in the reverse direction with respect to the winding direction. Part 36. In the following description, the forward direction of the winding direction is simply referred to as the forward direction, and the reverse direction of the winding direction is simply referred to as the reverse direction. The width of the convex portion 34 along the axial direction of the bobbin 21 is, for example, half or substantially half of the wound winding 38.
　本実施形態では、凸状部位３４の順方向側端部３５は、スリット３３の順方向端部よりも、順方向側に離間して配置されている。このようにすることで、巻線をスムーズに凸状部位３４に当接することができる。具体的には、仮に、円周方向に於いて、スリット３３の順方向端部と凸状部位３４とを一致させた場合、巻線巻回工程に於いて、スリット３３からボビン２１の内部に導入される巻線が、凸状部位３４が形成された箇所にて大きく曲折することに成り、この曲折により整列巻線が阻害される恐れがある。そこで、本実施形態では、凸状部位３４の順方向側端部３５を、スリット３３の順方向端部よりも、順方向側に離間して配置している。このようにすることで、図４（Ｂ）に示すように、スリット３３からボビン２１の内部に導入される巻線３８は、順方向に向かって緩やかに湾曲してから、凸状部位３４の側面に当接するようになり、後述する整列巻きを好適に行うことが出来る。 In the present embodiment, the forward side end portion 35 of the convex portion 34 is arranged farther in the forward direction side than the forward direction end portion of the slit 33. In this way, the winding can be smoothly brought into contact with the convex portion 34. Specifically, if the forward end of the slit 33 and the convex portion 34 are made to coincide with each other in the circumferential direction, the slit 33 is moved into the bobbin 21 in the winding winding process. The winding to be introduced is greatly bent at the place where the convex portion 34 is formed, and this bending may disturb the aligned winding. Therefore, in the present embodiment, the forward side end portion 35 of the convex portion 34 is arranged farther in the forward direction side than the forward direction end portion of the slit 33. In this way, as shown in FIG. 4B, the winding 38 introduced into the bobbin 21 from the slit 33 is gently curved in the forward direction, and then the convex portion 34 It comes to contact | abut to a side surface and the alignment winding mentioned later can be performed suitably.
　凸状部位３４の順方向側端部３５が、スリット３３の順方向側端部３５から離間する長さＬ５は、例えば０．５ｍｍ以上２．０ｍｍ以下である。 The length L5 at which the forward end 35 of the convex portion 34 is separated from the forward end 35 of the slit 33 is, for example, not less than 0.5 mm and not more than 2.0 mm.
　Ｌ５を０．５ｍｍ以上とすることで、スリット３３からボビン２１の内部に巻き込まれて凸状部位３４の側面に当接する部分の巻線３８が曲折する度合いを小さくし、整列巻きをスムーズに行うことが出来る。また、Ｌ５を２．０ｍｍ以下とすることで、凸状部位３４の長さを長く確保し、凸状部位３４の内側側面が巻線３８に接触することで、巻線３８の位置を規定する効果を大きくすることが出来る。 By setting L5 to 0.5 mm or more, the degree of bending of the portion of the winding 38 that is wound from the slit 33 into the bobbin 21 and contacts the side surface of the convex portion 34 is reduced, and the alignment winding is smoothly performed. I can do it. Further, by setting L5 to 2.0 mm or less, the length of the convex portion 34 is ensured to be long, and the inner side surface of the convex portion 34 is in contact with the winding 38, thereby defining the position of the winding 38. The effect can be increased.
　また、本実施形態では、凸状部位３４の逆方向側端部３６は、円周方向に於いて、スリット３３の逆方向側の端部と同一の位置に配置されている。このようにすることで、胴体部３０の円周方向に於いて凸状部位３４が形成される箇所を長く確保し、凸状部位３４を形成することで巻線を好適に整列することが出来る効果を大きくすることが出来る。 Further, in the present embodiment, the reverse side end 36 of the convex portion 34 is disposed at the same position as the reverse side end of the slit 33 in the circumferential direction. By doing in this way, the location where the convex part 34 is formed in the circumferential direction of the trunk | drum 30 can be ensured long, and the winding can be suitably aligned by forming the convex part 34. The effect can be increased.
　上記したように、胴体部３０の外側面には、巻回方向に沿って収納凸部３７が形成されている。収納凸部３７は巻回方向に対して平行に延在している。また、スリット３３の周辺部の胴体部３０の外面には非形成部３９が規定されており、この非形成部３９は、収納凸部３７は形成されていない円滑面である。非形成部３９に収納凸部３７が形成されていないことで、巻線をボビン２１に巻回する際に、非形成部３９にて、巻線３８が、ある収納凸部３７の逆方向端部から、その収納凸部３７に隣接した他の収納凸部３７の順方向端部に遷移することが可能となる。 As described above, the storage convex portion 37 is formed on the outer surface of the body portion 30 along the winding direction. The storage convex portion 37 extends in parallel to the winding direction. Further, a non-formed part 39 is defined on the outer surface of the body part 30 around the slit 33, and the non-formed part 39 is a smooth surface on which the storage convex part 37 is not formed. Since the storage convex portion 37 is not formed on the non-forming portion 39, when the winding is wound around the bobbin 21, the winding 38 is connected to the opposite end of the storage convex portion 37 at the non-forming portion 39. It is possible to transition from the portion to the forward end of the other storage convex portion 37 adjacent to the storage convex portion 37.
　図４を参照して、ボビン２１に巻線３８が巻回される構造を説明する。図４（Ａ）はボビン２１に巻線３８が巻回される構造を示す断面図であり、図４（Ｂ）は巻線３８が巻回される構成を半径方向外側から見た模式図である。 Referring to FIG. 4, the structure in which the winding 38 is wound around the bobbin 21 will be described. 4A is a cross-sectional view showing a structure in which the winding 38 is wound around the bobbin 21, and FIG. 4B is a schematic view of the configuration in which the winding 38 is wound as viewed from the outside in the radial direction. is there.
　図４（Ａ）を参照して、本実施形態では、ボビン２１に対して巻線３８を整列巻きしている。詳しくは、複数の段に渡って巻線３８を同数巻回する巻線方法は一般に同数巻線と称されているが、本形態の巻線方法は、同数巻線を基調としつつ、一段目の巻線位置を調整している。巻線３８は、一段目が右方端部から左方端部に向かって巻回され、二段目が逆に左方端部から右方端部に向かって巻回され、以降の段は奇数段が左方に向かって巻回され、偶数の段が右方に向かって巻回されている。 Referring to FIG. 4A, in the present embodiment, the winding 38 is wound around the bobbin 21 in an aligned manner. Specifically, a winding method for winding the same number of windings 38 across a plurality of stages is generally referred to as the same number winding, but the winding method of the present embodiment is based on the same number of windings, and the first stage. The winding position is adjusted. In the winding 38, the first stage is wound from the right end to the left end, and the second stage is wound from the left end to the right end. Odd-numbered steps are wound toward the left, and even-numbered steps are wound toward the right.
　上記したように、胴体部３０と第１フランジ部３１とが連続する部分には、矩形の断面形状を有する凸状部位３４が形成されている。凸状部位３４の左方側側面は、一段目の最も右方に最初に巻回される巻線３８Ａの右端に接触している。上記したように、凸状部位３４の幅は、巻線３８の直径の半分または略半分とされている。また、凸状部位３４の左方側面を、一段目の最も右方に最初に巻回される巻線３８Ａの右端に接触することで、一段目の最も左方に巻回される巻線３８Ｃを所定位置に配置し、巻線３８Ｃの左方端部を第２フランジ部３２の内側側面に当接させている。これにより、後述するように二段目の巻線３８を所定箇所に配置できる利点がある。また、凸状部位３４は二段目に巻回される巻線３８には接触していない。 As described above, a convex portion 34 having a rectangular cross-sectional shape is formed in a portion where the body portion 30 and the first flange portion 31 are continuous. The left side surface of the convex portion 34 is in contact with the right end of the winding 38 </ b> A that is wound first on the rightmost side of the first stage. As described above, the width of the convex portion 34 is half or substantially half the diameter of the winding 38. In addition, the left side surface of the convex portion 34 is brought into contact with the right end of the winding 38A that is wound first on the rightmost side of the first stage, whereby the winding 38C wound on the leftmost side of the first stage. Is arranged at a predetermined position, and the left end portion of the winding 38 </ b> C is brought into contact with the inner side surface of the second flange portion 32. As a result, there is an advantage that the second-stage winding 38 can be arranged at a predetermined location as will be described later. Further, the convex portion 34 is not in contact with the winding 38 wound in the second stage.
　図４（Ｂ）も併せて参照して、一段目の最も左方に配置される巻線３８Ｃおよび巻線３８Ｄの間の上方に、二段目の最初に巻回される巻線３８Ｄ（巻線３８Ｄは点線で示している）が載置される。上記のように本実施形態では、ボビン２１に凸状部位３４を形成することで、一段目の最後に巻回される巻線３８Ｂ、３８Ｃの位置を正確に規定しているので、巻線３８Ｃおよび巻線３８Ｄの間の上方に配置される巻線３８Ｄの位置を正確に規定することができる。よって、巻線３８を全体的に所定位置で巻回することが可能であり、巻線３８を密に巻回することが出来る。 Referring also to FIG. 4B, the winding 38D (winding) wound first in the second stage is disposed above the winding 38C and the winding 38D arranged on the leftmost side of the first stage. The line 38D is indicated by a dotted line). As described above, in the present embodiment, by forming the convex portion 34 on the bobbin 21, the position of the windings 38B and 38C wound at the end of the first stage is accurately defined. In addition, the position of the winding 38D disposed between the winding 38D and the winding 38D can be accurately defined. Therefore, the winding 38 can be entirely wound at a predetermined position, and the winding 38 can be tightly wound.
　図５を参照して、上記した本実施形態による効果を説明する。図５（Ａ）は本実施形態に係る巻線構成を示す断面図であり、図５（Ｂ）は比較例の巻線構成を示す断面図である。 With reference to FIG. 5, the effect by this embodiment mentioned above is demonstrated. FIG. 5A is a cross-sectional view showing a winding configuration according to this embodiment, and FIG. 5B is a cross-sectional view showing a winding configuration of a comparative example.
　図５（Ａ）を参照して、上記したように、一段目の巻線３８Ｂ、３８Ｃは、第２フランジ部３２側に寄せられて密着するように配列されている。従って、二段面の最初の巻線３８である巻線３８Ｄは、巻線３８Ｂと巻線３８Ｃとの中間に配置される。ここで、一般には精密な動作をするとされている巻線装置であっても、その機械機構や動作には一定の公差が含まれていることから、二段面の巻線３８Ｄが巻回される位置が多少なりとも左右方向にずれることが考えられる。本形態では、巻線３８Ｂと巻線３８Ｃとの中間に、二段面の巻線３８Ｄを配置すれば良いことから、左右方向に於いて、巻線３８Ｄの中心位置Ｐ１２のずれの許容長さを、巻線３８Ｂの中心位置Ｐ１１と巻線３８Ｃの中心位置Ｐ１２との間とすることができる。巻線３８Ｂの中心位置Ｐ１１と巻線３８Ｃの中心位置Ｐ１０との距離Ｌ２は、巻線３８Ｂ等の直径と同等であり、充分に広い。即ち、巻線３８Ｄは、点線で示す位置まで左方にずれることが許容され、一点鎖線で示す位置まで右方にずれることが許容される。よって、巻線３８Ｄが巻回される位置が多少ずれたとしても、巻線３８Ｄが巻線３８Ｂと巻線３８Ｃとの間から外れてしまうことを抑止することが出来る。 Referring to FIG. 5A, as described above, the first- stage windings 38B and 38C are arranged so as to be brought into close contact with the second flange portion 32 side. Accordingly, the winding 38D, which is the first winding 38 on the two-step surface, is disposed between the winding 38B and the winding 38C. Here, even in a winding device that is generally supposed to perform a precise operation, the mechanical mechanism and operation include certain tolerances, so that the two-step winding 38D is wound. It is conceivable that the position of the position shifts to the left or right. In the present embodiment, since the two-step winding 38D may be disposed between the winding 38B and the winding 38C, the allowable length of deviation of the center position P12 of the winding 38D in the left-right direction. Can be between the center position P11 of the winding 38B and the center position P12 of the winding 38C. The distance L2 between the center position P11 of the winding 38B and the center position P10 of the winding 38C is equal to the diameter of the winding 38B and the like, and is sufficiently wide. That is, the winding 38 </ b> D is allowed to shift leftward to the position indicated by the dotted line and allowed to shift rightward to the position indicated by the alternate long and short dash line. Therefore, even if the position where the winding 38D is wound is slightly deviated, the winding 38D can be prevented from coming off between the winding 38B and the winding 38C.
　図５（Ｂ）を参照して、比較例を説明する。一段目の左端に配置される巻線３８Ｃが第２フランジ部３２から離れて巻回された場合は、二段目の左端に巻回される巻線３８Ｄは、左右方向に於いて、巻線３８Ｃと第２フランジ部３２との間に配置されることになる。図４（Ａ）を参照して、第１フランジ部３１側の端部に凸状部位３４を形成せずに、第１フランジ部３１に巻線３８Ａを密着して巻回を続けると、このようになる。この場合、巻線３８Ｄのずれが許容される許容長さは、巻線３８Ｃの中心位置Ｐ１０から巻線３８Ｄの中心位置Ｐ１２までの短い幅Ｌ３と成ってしまう。Ｌ３は巻線３８Ｃの半径と同等である。よって、この比較例の場合は、巻線３８Ｄが巻回される位置がずれた場合（例えば巻線３８Ｄが点線で示す箇所までずれた場合）、巻線３８Ｄが巻線３８Ｃと第２フランジ部３２との間から外れてしまう恐れが大きい。 A comparative example will be described with reference to FIG. When the winding 38C disposed at the left end of the first stage is wound away from the second flange portion 32, the winding 38D wound at the left end of the second stage is wound in the left-right direction. 38C and the 2nd flange part 32 will be arrange | positioned. With reference to FIG. 4 (A), if the winding 38A is brought into close contact with the first flange portion 31 without forming the convex portion 34 at the end on the first flange portion 31 side, It becomes like this. In this case, the allowable length in which the deviation of the winding 38D is allowed is a short width L3 from the center position P10 of the winding 38C to the center position P12 of the winding 38D. L3 is equivalent to the radius of the winding 38C. Therefore, in the case of this comparative example, when the position where the winding 38D is wound is shifted (for example, when the winding 38D is shifted to a position indicated by a dotted line), the winding 38D is connected to the winding 38C and the second flange portion. There is a high risk that it will be out of the range.
　図６を参照して、上記したボビン２１の胴体部３０の外側側面には、その円周方向に沿って収納凸部３７が形成されている。収納凸部３７は各巻線３８に対応して形成されており、三角形形状の断面を有している。ここでは、３つの収納凸部３７を示しており、これらの収納凸部３７の間に、一列目の巻線３８Ｅ、３８Ｆが収納されている。巻線３８Ｅ、３８Ｆはそれぞれ、左右両側の下方部分が、収納凸部３７の傾斜面に接触している。また、巻線３８Ｅと巻線３８Ｆとの間の上方に、二列目の巻線３８Ｇが巻回されている。 Referring to FIG. 6, a housing convex portion 37 is formed on the outer side surface of the body portion 30 of the bobbin 21 along the circumferential direction. The storage convex portion 37 is formed corresponding to each winding 38 and has a triangular cross section. Here, three storage convex portions 37 are shown, and the windings 38E and 38F in the first row are stored between the storage convex portions 37. The windings 38 </ b> E and 38 </ b> F are in contact with the inclined surfaces of the storage convex portion 37 at the lower portions on both the left and right sides. A second row of windings 38G is wound above the windings 38E and 38F.
　収納凸部３７は、胴体部３０の表面から三角形状に外側に向かって突出する形状を呈しており、収納凸部３７の傾斜面が胴体部３０の表面から傾斜する傾斜角θは、例えば、４５度以上６０度以下である。 The storage convex portion 37 has a shape protruding outward from the surface of the body portion 30 in a triangular shape, and the inclination angle θ at which the inclined surface of the storage convex portion 37 is inclined from the surface of the body portion 30 is, for example, It is 45 degrees or more and 60 degrees or less.
　収納凸部３７の斜面の傾斜角θを４５度以上とすることで、二列目の巻線３８Ｇを、収納凸部３７で安定して支持することが出来る。具体的には、先ず、一列目の巻線３８Ｅの加重が収納凸部３７に作用する点をＰ２０、二列目の巻線３８Ｆの加重が収納凸部３７に作用する点をＰ２１とした場合、Ｐ２１をＰ２０よりも収納凸部３７の末端側とすることができる。更に、巻線３８Ｆ、３８Ｅ、３８Ｇを端部とする三角形領域を規定した場合（図ではこの三角形領域を一点鎖線で示している。）、Ｐ２１をＰ２０よりも三角形領域の内側に配置することができ、これにより二列目の巻線３８Ｇを、巻線３８Ｆ、３８Ｅを介して、収納凸部３７の斜面で安定して支持することが出来る。 When the inclination angle θ of the slope of the storage convex portion 37 is set to 45 degrees or more, the second winding 38G can be stably supported by the storage convex portion 37. Specifically, first, the point where the weight of the winding 38E in the first row acts on the storage convex portion 37 is P20, and the point where the weight of the winding 38F in the second row acts on the storage convex portion 37 is P21. , P21 can be set to the end side of the storage convex portion 37 with respect to P20. Furthermore, when a triangular region having the windings 38F, 38E, and 38G as an end is defined (this triangular region is indicated by a one-dot chain line in the drawing), P21 may be disposed inside the triangular region with respect to P20. This makes it possible to stably support the second row of windings 38G on the slope of the storage convex portion 37 via the windings 38F and 38E.
　また、収納凸部３７の斜面の傾斜角θを６０度以下とすることで、収納凸部３７を有するボビン２１を射出成形する際に、ボビン２１と成形金型との離型性を良好なものとすることが出来る。 Moreover, when the inclination angle θ of the slope of the storage convex portion 37 is 60 degrees or less, when the bobbin 21 having the storage convex portion 37 is injection-molded, the releasability between the bobbin 21 and the molding die is good. Can be.
　図７を参照して、図１に示した構成を有する電磁クラッチの製造方法を説明する。ここでは、ボビン２１に巻線３８を巻回する工程を示しており、図７（Ａ）は巻線工程を示す側面図であり、図７（Ｂ）は巻線に用いられるノズル４０の構成を示す図である。 Referring to FIG. 7, a method for manufacturing the electromagnetic clutch having the configuration shown in FIG. 1 will be described. Here, a process of winding the winding 38 around the bobbin 21 is shown, FIG. 7A is a side view showing the winding process, and FIG. 7B is a configuration of the nozzle 40 used for the winding. FIG.
　図７（Ａ）を参照して、本工程では、ボビン２１を紙面上にて反時計回りに所定の速度で回転させながら、ノズル４０から繰り出される巻線３８をボビン２１の胴体部３０に巻回する。ノズル４０は巻線３８をボビン２１に対して繰り出しつつ、ボビン２１の軸方向に沿って往復運動する。ここでは、ノズル４０は、紙面を垂直に突き抜ける方向に沿って往復運動する。 Referring to FIG. 7A, in this step, the winding 38 fed out from the nozzle 40 is wound around the body 30 of the bobbin 21 while the bobbin 21 is rotated counterclockwise on the paper surface at a predetermined speed. Turn. The nozzle 40 reciprocates along the axial direction of the bobbin 21 while feeding the winding 38 to the bobbin 21. Here, the nozzle 40 reciprocates along a direction that penetrates the paper surface vertically.
　この際、図３および図４に示したように、スリット３３からボビン２１に導入された巻線３８は、先ず、凸状部位３４の左方側面に接しながら巻回される。これにより、一段目の巻線３８が所定箇所に好適に巻回される。 At this time, as shown in FIGS. 3 and 4, the winding 38 introduced from the slit 33 to the bobbin 21 is first wound while being in contact with the left side surface of the convex portion 34. Thereby, the winding 38 of the first stage is suitably wound around a predetermined location.
　図７（Ｂ）を参照して、ノズル４０は円筒形状を呈しており、ノズル４０の内径は巻線３８よりも大きく形成されている。 Referring to FIG. 7B, the nozzle 40 has a cylindrical shape, and the inner diameter of the nozzle 40 is formed larger than the winding 38.
　巻線３８として、銅から成る銅線またはアルミニウムから成るアルミ線を採用することが出来る。特に、巻線３８としてアルミ線を採用した場合は、アルミニウムは銅と比較すると変形しやすい材料であることから、巻回時に巻線３８に与える引っ張り強度を好適に調整する必要がある。巻線３８は、銅またはアルミニウムから成る金属線、この金属線の周囲を被覆するポリエステル皮膜および滑性皮膜から形成されている。巻線３８の表面は、巻回時に於ける滑り性を確保するために、その摩擦係数は、０．４５～０．５５以下とされている。 As the winding 38, a copper wire made of copper or an aluminum wire made of aluminum can be adopted. In particular, when an aluminum wire is adopted as the winding 38, it is necessary to suitably adjust the tensile strength applied to the winding 38 during winding because aluminum is a material that is more easily deformed than copper. The winding 38 is formed of a metal wire made of copper or aluminum, a polyester film and a slipping film covering the periphery of the metal wire. The surface of the winding 38 has a friction coefficient of 0.45 to 0.55 or less in order to ensure slipperiness during winding.
　ノズル４０とボビン２１との相対的位置は、ボビン２１の所定箇所に巻線３８を巻回でき、且つ、巻線３８の過度の変形を抑止できるものとされている。 The relative position between the nozzle 40 and the bobbin 21 is such that the winding 38 can be wound around a predetermined portion of the bobbin 21 and excessive deformation of the winding 38 can be suppressed.
　図７（Ａ）を参照して、ノズル４０とボビン２１との相対的位置を規定するための方向を説明する。まず、ボビン２１の胴体部３０に巻線３８が巻回され始める巻回開始部分をＰ３０とする。Ｐ３０にてボビン２１の胴体部３０に接する接線が伸びる方向である接線方向に直交すると共に、ボビン２１から離れる方向を第１方向とする。また、第１方向に対向する方向を第２方向とする。紙面上では、上方が第１方向であり、下方が第２方向である。 Referring to FIG. 7A, directions for defining the relative positions of the nozzle 40 and the bobbin 21 will be described. First, a winding start portion where the winding 38 starts to be wound around the body portion 30 of the bobbin 21 is defined as P30. A direction that is perpendicular to the tangential direction, which is the direction in which the tangent line that contacts the body part 30 of the bobbin 21 extends at P30, is the first direction. The direction facing the first direction is the second direction. On the paper, the upper direction is the first direction and the lower direction is the second direction.
　本実施形態では、ノズル４０から巻線３８を導出してボビン２１に巻回する際に、ノズル４０の位置を、ボビン２１の巻回開始部分Ｐ３０よりも第２方向側（紙面上では下方側）としている。このようにすることで、図７（Ｂ）に示すように、ノズル４０の内壁上端で巻線３８の上端部を下方に押し込みながら、巻線３８をボビン２１に供給することができ、胴体部３０の所定箇所に巻線３８を巻回することが出来る。 In the present embodiment, when the winding 38 is led out from the nozzle 40 and wound around the bobbin 21, the position of the nozzle 40 is set to the second direction side from the winding start portion P30 of the bobbin 21 (the lower side on the paper surface). ). In this way, as shown in FIG. 7B, the winding 38 can be supplied to the bobbin 21 while pushing the upper end of the winding 38 downward at the upper end of the inner wall of the nozzle 40, and the body portion. The winding 38 can be wound around 30 predetermined locations.
　更に好適には、巻回を行う際のノズル４０の位置は、ボビン２１の巻回開始部分Ｐ３０よりも第２方向側（紙面上では下方側）であり、且つ、ボビン２１の胴体部３０の中心位置Ｐ２０よりも第１後方側（紙面上では上方側）とされる。そのようにすることで、ノズル４０の内壁上端が巻線３８に与える押圧力を適切に制御し、繰り出される巻線３８の上端部が過度に変形することを防止できる。特に、巻線３８としてアルミ線が採用された場合は、アルミ線は変形しやすい材料であるため、変形することで巻き崩れが生じてしまう恐れが大きいが、ボビン２１の上下方向の位置をこのように最適化することで、このような恐れを排除することが出来る。 More preferably, the position of the nozzle 40 at the time of winding is the second direction side (lower side on the paper surface) with respect to the winding start portion P30 of the bobbin 21, and the body portion 30 of the bobbin 21 It is the first rear side (upper side on the paper surface) from the center position P20. By doing so, it is possible to appropriately control the pressing force applied to the winding 38 by the upper end of the inner wall of the nozzle 40 and to prevent the upper end portion of the winding 38 that is fed out from being excessively deformed. In particular, when an aluminum wire is used as the winding 38, the aluminum wire is a material that is easily deformed, and therefore, there is a high possibility that the deformation will cause the winding to collapse. Such a fear can be eliminated by optimizing in this way.
　また、巻線３８をボビン２１の胴体部３０に巻回する際には、胴体部３０の軸方向に沿ってノズル４０を移動させつつ巻線３８を胴体部３０に供給する。本形態では、軸方向に於いて、ノズル４０は巻線３８が胴体部３０に巻回される位置に対して先行しない。本形態では、軸方向に於いて、ノズル４０は、巻線３８が胴体部３０に巻回される位置に遅れてトラバースする。このようにすることで、巻線３８が特にアルミ線である場合は、巻線３８に与える引っ張り応力が過度になることを抑止しつつ、巻線３８の整列巻きを良好に実現することができる。　 Further, when winding the winding 38 around the body portion 30 of the bobbin 21, the winding 38 is supplied to the body portion 30 while moving the nozzle 40 along the axial direction of the body portion 30. In this embodiment, in the axial direction, the nozzle 40 does not precede the position where the winding 38 is wound around the body portion 30. In the present embodiment, in the axial direction, the nozzle 40 traverses behind the position where the winding 38 is wound around the body portion 30. By doing in this way, when the winding 38 is an aluminum wire in particular, it is possible to satisfactorily realize the aligned winding of the winding 38 while suppressing an excessive tensile stress applied to the winding 38. . *
　上記工程が終了した後は、図２に示したように、巻線３８が巻回されたボビン２１をリング２２に収納し、巻線３８とコネクタ２３とを接続し、樹脂充填を行うことで、磁界発生ユニット２０を構成する。更に、図１を参照して、磁界発生ユニット２０、ロータ１１およびアーマチュア１２を相互に組み込むことで、電磁クラッチ１０を製造する。 After the above process is completed, as shown in FIG. 2, the bobbin 21 around which the winding 38 is wound is stored in the ring 22, the winding 38 and the connector 23 are connected, and resin filling is performed. The magnetic field generation unit 20 is configured. Further, referring to FIG. 1, the electromagnetic clutch 10 is manufactured by incorporating the magnetic field generating unit 20, the rotor 11, and the armature 12 with each other.
　以上、本発明の実施形態を示したが、本発明は、上記実施形態に限定されるものではない。 As mentioned above, although embodiment of this invention was shown, this invention is not limited to the said embodiment.
１０   電磁クラッチ
１１   ロータ
１２   アーマチュア
１８   ハブ
２０   磁界発生ユニット
２１   ボビン
２２   リング
２３   コネクタ
２４   側方突出部
３０   胴体部
３１   第１フランジ部
３２   第２フランジ部
３３   スリット
３４   凸状部位
３５   順方向側端部
３６   逆方向側端部
３７   収納凸部
３８、３８Ａ、３８Ｂ、３８Ｃ、３８Ｄ、３８Ｅ、３８Ｆ、３８Ｇ   巻線
３９   非形成部
４０   ノズル
 
  DESCRIPTION OF SYMBOLS 10 Electromagnetic clutch 11 Rotor 12 Armature 18 Hub 20 Magnetic field generation unit 21 Bobbin 22 Ring 23 Connector 24 Side protrusion part 30 Body part 31 First flange part 32 Second flange part 33 Slit 34 Convex part 35 Forward side end part 36 Reverse direction end 37 Storage convex part 38, 38A, 38B, 38C, 38D, 38E, 38F, 38G Winding 39 Non-formation part 40 Nozzle

Claims (6)

  1. 　ロータと、
    　前記ロータの軸方向側方に配置され、磁界により前記ロータの側面に吸着されるアーマチュアと、
    　前記アーマチュアを前記ロータに吸着する前記磁界を励磁により発生させる磁界発生ユニットと、を具備し、
    　前記磁界発生ユニットは、ボビンと、前記ボビンに巻回された巻線と、を有し、
    　前記ボビンは、円筒形状または略円筒形状の胴体部と、前記胴体部の一方側の軸方向端部側から半径方向外側に向かって壁状に伸びる第１フランジ部と、前記胴体部の他方側の軸方向端部側から半径方向外側に向かって壁状に伸びる第２フランジ部と、前記第１フランジ部に形成したスリットと、前記胴体部の外面の前記一方側の端部を半径方向外側に向かって突出させた不完全環状の凸状部位と、を有し、
    　前記凸状部位は、前記巻線の巻回方向に沿って、順方向側端部と逆方向側端部とを有し、前記順方向側端部は、前記スリットから離間して、順方向側に配置されることを特徴とする電磁クラッチ。     The rotor,
    An armature disposed on the side of the rotor in the axial direction and attracted to a side surface of the rotor by a magnetic field;
    A magnetic field generation unit that generates the magnetic field that attracts the armature to the rotor by excitation, and
    The magnetic field generation unit has a bobbin and a winding wound around the bobbin,
    The bobbin includes a cylindrical or substantially cylindrical body part, a first flange part extending in a wall shape from an axial end side on one side of the body part toward a radially outer side, and the other side of the body part A second flange portion extending in the shape of a wall from the axial end side toward the outer side in the radial direction, a slit formed in the first flange portion, and an end on the one side of the outer surface of the body portion radially outward And an incomplete annular convex portion projecting toward the
    The convex portion has a forward side end and a reverse side end along the winding direction of the winding, and the forward side end is separated from the slit and forward An electromagnetic clutch arranged on the side.
  2. 　前記凸状部位の軸方向の幅は、前記巻線の直径の半分または略半分であり、
    　巻回される１層目の前記巻線の、最も前記他方側に配置される前記巻線は、前記第２フランジ部に当接することを特徴とする請求項１に記載の電磁クラッチ。     The axial width of the convex portion is half or substantially half of the diameter of the winding,
    2. The electromagnetic clutch according to claim 1, wherein the winding disposed on the most other side of the wound first layer is in contact with the second flange portion.
  3. 　前記ボビンの前記胴体部の外周面には、１層目の前記巻線に当接する収納凸部が前記巻回方向に沿って形成され、前記収納凸部が前記胴体部の外周面から傾斜する傾斜角は、４５度以上６０度以下であることを特徴とする請求項１または請求項２に記載の電磁クラッチ。 On the outer peripheral surface of the body portion of the bobbin, a storage convex portion that contacts the winding of the first layer is formed along the winding direction, and the storage convex portion is inclined from the outer peripheral surface of the body portion. The electromagnetic clutch according to claim 1 or 2, wherein the inclination angle is not less than 45 degrees and not more than 60 degrees.
  4. 　ボビンに巻線と巻回することで磁界発生ユニットを構成する工程を有する電磁クラッチの製造方法であり、
    　前記ボビンは、円筒形状または略円筒形状の胴体部と、前記胴体部の一方側の軸方向端部側から半径方向外側に向かって壁状に伸びる第１フランジ部と、前記胴体部の他方側の軸方向端部側から半径方向外側に向かって壁状に伸びる第２フランジ部と、前記第１フランジ部に形成したスリットと、前記胴体部の外面の前記一方側の端部を半径方向外側に向かって突出させた不完全環状の凸状部位と、を有し、
    　前記凸状部位は、前記巻線の巻回方向に沿って順方向側端部と逆方向側端部とを有する共に、前記凸状部位の前記順方向側端部は、前記スリットから離間して、順方向側に配置され、
    　前記ボビンに前記巻線を巻回する際には、前記スリットから前記ボビンに巻き込んだ前記巻線を前記凸状部位に当接させながら、前記ボビンの前記胴体部に巻回することを特徴とする電磁クラッチの製造方法。     A method of manufacturing an electromagnetic clutch having a step of forming a magnetic field generating unit by winding and winding on a bobbin,
    The bobbin includes a cylindrical or substantially cylindrical body part, a first flange part extending in a wall shape from an axial end side on one side of the body part toward a radially outer side, and the other side of the body part A second flange portion extending in the shape of a wall from the axial end side toward the outer side in the radial direction, a slit formed in the first flange portion, and an end on the one side of the outer surface of the body portion radially outward And an incomplete annular convex portion projecting toward the
    The convex part has a forward-side end and a reverse-side end along the winding direction of the winding, and the forward-side end of the convex part is separated from the slit. Placed on the forward side,
    When winding the winding around the bobbin, the winding wound around the bobbin from the slit is wound around the body portion of the bobbin while being brought into contact with the convex portion. A method for manufacturing an electromagnetic clutch.
  5. 　前記胴体部に前記巻線を巻回する際には、ノズルを経由して、回転する前記ボビンに前記巻線を供給し、
    　前記胴体部に前記巻線が巻回され始める巻回開始部分の接線方向に直交する方向であって前記ボビンから離れる方向を第１方向、前記第１方向に対向する方向を第２方向とした場合、
    　前記ノズルは、前記巻線の巻回が始まる前記ボビンの前記胴体部の前記巻回開始部分よりも、前記第２方向側に配置されることを特徴とする請求項４に記載の電磁クラッチの製造方法。     When winding the winding around the body part, the winding is supplied to the rotating bobbin via a nozzle,
    A direction perpendicular to a tangential direction of a winding start portion where the winding starts to be wound around the body portion and a direction away from the bobbin is defined as a first direction, and a direction facing the first direction is defined as a second direction. If
    5. The electromagnetic clutch according to claim 4, wherein the nozzle is disposed on the second direction side of the winding start portion of the body portion of the bobbin where the winding of the winding starts. Production method.
  6. 　前記ノズルは、前記巻線の巻回が始まる前記ボビンの前記胴体部よりも、前記第２方向側に配置され、且つ、前記胴体部の中心よりも前記第１方向側に配置されることを特徴とする請求項５に記載の電磁クラッチの製造方法。
     
          The nozzle is disposed on the second direction side with respect to the body portion of the bobbin where the winding of the winding starts, and is disposed on the first direction side with respect to the center of the body portion. The method of manufacturing an electromagnetic clutch according to claim 5, wherein

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