WO2016103665A1 - Embrayage électromagnétique, et procédé de fabrication de celui-ci - Google Patents

Embrayage électromagnétique, et procédé de fabrication de celui-ci Download PDF

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Publication number
WO2016103665A1
WO2016103665A1 PCT/JP2015/006304 JP2015006304W WO2016103665A1 WO 2016103665 A1 WO2016103665 A1 WO 2016103665A1 JP 2015006304 W JP2015006304 W JP 2015006304W WO 2016103665 A1 WO2016103665 A1 WO 2016103665A1
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WO
WIPO (PCT)
Prior art keywords
stator
cylindrical portion
electromagnetic coil
rotor
armature
Prior art date
Application number
PCT/JP2015/006304
Other languages
English (en)
Japanese (ja)
Inventor
佳紀 福村
Original Assignee
株式会社デンソー
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Filing date
Publication date
Priority claimed from JP2015230898A external-priority patent/JP2016121802A/ja
Application filed by 株式会社デンソー filed Critical 株式会社デンソー
Publication of WO2016103665A1 publication Critical patent/WO2016103665A1/fr

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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
    • 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
    • F16D27/108—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members
    • F16D27/112—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members with flat friction surfaces, e.g. discs

Definitions

  • This disclosure relates to an electromagnetic clutch and a manufacturing method thereof.
  • Patent Document 1 describes an electromagnetic clutch including a rotor, a stator, and an electromagnetic coil.
  • the rotor has a U-shaped cross section having an inner cylindrical portion and an outer cylindrical portion centered on the rotation center line, and a rotor wall portion connected to these end portions.
  • the stator has an L-shaped cross section having a cylindrical portion centered on the rotation center line of the rotor and a stator wall portion extending from the end of the cylindrical portion on the side away from the rotor wall portion toward the radially outer side of the cylindrical portion. Shape.
  • the electromagnetic coil is wound around a spool (also called a coil bobbin) having a U-shaped cross section, and is fixed to the cylindrical portion of the stator via the spool.
  • the stator is disposed in an inner space of the rotor surrounded by the outer cylindrical portion, the inner cylindrical portion and the rotor wall portion of the rotor in a state where the electromagnetic coil is fixed, and the cylindrical portion of the stator is connected to the inner cylindrical portion of the rotor.
  • the end faces in the radial direction of the stator wall portion are opposed to the outer cylindrical portion of the rotor via the gap.
  • the electromagnetic coil can be directly wound (directly wound) around the stator.
  • the radial direction dimension of the coil space in a stator radial direction can be expanded by the thickness of the part by which the electromagnetic coil of a spool is wound.
  • the reduction in the transmission torque capability is not limited to the electromagnetic clutch in which the electromagnetic coil is directly wound around the L-shaped stator and the electromagnetic coil is fixed to the stator.
  • an electromagnetic clutch in which an electromagnetic coil is disposed via an interposed member on the radially outer side of the cylindrical portion of the L-shaped stator, and the electromagnetic coil is fixed to the stator, the transmission torque capability can be reduced.
  • the present disclosure has a first object of suppressing a decrease in transmission torque capability in an electromagnetic clutch using a stator having an L-shaped cross section. Moreover, this indication makes it the 2nd objective to suppress the fall of the transmission torque capability in the electromagnetic clutch which wound the electromagnetic coil directly on the stator of L-shaped cross section.
  • the electromagnetic clutch includes an electromagnetic coil that generates an electromagnetic attractive force when energized, a rotor that rotates around a rotation center line by receiving a rotational driving force from a driving source, and energization of the electromagnetic coil.
  • An armature that is sometimes coupled to the rotor by electromagnetic attraction force and separated from the rotor when the electromagnetic coil is not energized, a stator that is disposed in the internal space of the rotor, and that holds the electromagnetic coil, and a member that is separate from the stator And a separate member.
  • the rotor, the armature, the stator and the separate member are made of a magnetic material.
  • the rotor includes an outer cylindrical portion centered on the rotation center line, an inner cylindrical portion centered on the rotation center line, an end portion on the side close to the armature of the outer cylindrical portion, and the inner cylinder. And a wall portion connecting the end portion of the portion close to the armature.
  • a space surrounded by the outer cylindrical portion, the inner cylindrical portion and the wall portion of the rotor is the inner space of the rotor.
  • the stator includes a cylindrical portion centering on the rotation center line and a wall portion extending from the end opposite to the armature of the cylindrical portion of the stator toward the radially outer side of the cylindrical portion of the stator.
  • the electromagnetic coil is disposed radially outside the cylindrical portion of the stator.
  • the separate member has at least a separate cylindrical portion centered on the rotation center line and is in contact with the wall portion of the stator.
  • the separate cylindrical portion is disposed outside the electromagnetic coil in the radial direction so as to cover the outer periphery of the electromagnetic coil, and is opposed to the outer cylindrical portion of the rotor via a gap.
  • the electromagnetic clutch includes an electromagnetic coil that generates an electromagnetic attractive force when energized, a rotor that rotates around a rotation center line by receiving a rotational driving force from a driving source, and energization of the electromagnetic coil.
  • An armature that is sometimes coupled to the rotor by electromagnetic attraction force and separated from the rotor when the electromagnetic coil is not energized, a stator that is disposed in the internal space of the rotor, and that holds the electromagnetic coil, and a member that is separate from the stator And a separate member.
  • the rotor, the armature, the stator and the separate member are made of a magnetic material.
  • the rotor includes an outer cylindrical portion centered on the rotation center line, an inner cylindrical portion centered on the rotation center line, an end portion on the side close to the armature of the outer cylindrical portion, and the inner cylinder. And a wall portion connecting the end portion of the portion close to the armature.
  • a space surrounded by the outer cylindrical portion, the inner cylindrical portion and the wall portion of the rotor is the inner space of the rotor.
  • the stator includes a cylindrical portion centering on the rotation center line and a wall portion extending from the end opposite to the armature of the cylindrical portion of the stator toward the radially outer side of the cylindrical portion of the stator.
  • the electromagnetic coil is directly wound around the cylindrical portion of the stator.
  • the separate member has at least a separate cylindrical portion centered on the rotation center line and is in contact with the wall portion of the stator.
  • the separate cylindrical portion is disposed outside the electromagnetic coil in the radial direction so as to cover the outer periphery of the electromagnetic coil, and is opposed to the outer cylindrical portion of the rotor via a gap.
  • the outer cylindrical portion of the stator faces the outer cylindrical portion of the rotor via a gap in a state where the stator is disposed in the inner space of the rotor.
  • the L-shaped cross section of the stator and the separate cylindrical portion are arranged in the inner space of the rotor, and the separate cylindrical portion is provided with a gap in the outer cylindrical portion of the rotor.
  • the magnetic resistance between the separate cylindrical portion and the stator is lower than that of a member away from the stator, and can be regarded as a part of the stator.
  • the outer cylindrical portion of the rotor is substantially The area facing the stator can be increased.
  • the facing area between the outer cylindrical portion of the rotor and the stator can be brought close to the facing area when a stator having a U-shaped cross section is used.
  • FIG. 5 is a sectional view taken along line VV in FIG. 4.
  • FIG. 4 is the front view of the arm support in FIG. 1, Comprising: It is the figure which looked at the arm support from the VI arrow direction of FIG. It is the VII-VII sectional view taken on the line in FIG. It is a figure which shows the assembly
  • an engine is a drive source and the compressor 2 is a driven device.
  • the compressor 2 sucks and compresses the refrigerant, and is decompressed by a radiator that dissipates the refrigerant discharged from the compressor 2, an expansion valve that decompresses and expands the refrigerant flowing out of the radiator, and an expansion valve.
  • a refrigerating cycle device for a vehicle air conditioner is configured together with an evaporator that evaporates the refrigerant and exerts an endothermic effect.
  • the electromagnetic clutch 1 includes a rotor 10 that constitutes a driving side rotating body that rotates around a rotation center line O when receiving a rotational driving force from an engine, and a driven side rotation that is coupled to a rotating shaft 2 a of the compressor 2. And an armature 20 constituting the body. By connecting or disconnecting the rotor 10 and the armature 20, transmission of the rotational driving force from the engine to the compressor 2 is interrupted.
  • FIG. 1 shows a state where the rotor 10 and the armature 20 are separated from each other.
  • the electromagnetic clutch 1 connects the rotor 10 and the armature 20, the rotational driving force of the engine is transmitted to the compressor 2 and the refrigeration cycle apparatus operates.
  • the electromagnetic clutch 1 separates the rotor 10 and the armature 20, the rotational driving force of the engine is not transmitted to the compressor 2, and the refrigeration cycle apparatus does not operate.
  • the operation of the electromagnetic clutch 1 is controlled by a control signal output from an air conditioning control device that controls the operation of various components of the refrigeration cycle apparatus.
  • the electromagnetic clutch 1 includes a rotor 10, an armature 20, a stator 30, and an arm support 40.
  • the rotor 10 has a double-cylindrical structure with a U-shaped cross section that is open on the side opposite to the armature 20 that is on the side opposite to the armature (the right side in FIG. 1). That is, the rotor 10 includes an outer cylindrical portion 11 centered on the rotation center line O, an inner cylindrical portion 12 centered on the rotation center line O, and an outer cylindrical portion disposed on the inner peripheral side of the outer cylindrical portion 11. 11 and a wall portion 13 extending in a direction perpendicular to the rotation center line O so as to connect ends of the inner cylindrical portion 12 on the side close to the armature 20.
  • the outer cylindrical portion 11, the inner cylindrical portion 12, and the wall portion 13 are made of a magnetic material such as iron.
  • the outer cylindrical portion 11 and the inner cylindrical portion 12 have the same axial length of the rotation center line O.
  • the outer cylindrical portion 11 and the inner cylindrical portion 12 are arranged coaxially with respect to the rotating shaft 2a of the compressor 2. That is, the rotation center line O shown in FIG. 1 is a rotation center line of the outer cylindrical portion 11 and the inner cylindrical portion 12, and also a rotation center line of the rotation shaft 2a.
  • the rotation center line O shown in FIG. 1 is a rotation center line of the outer cylindrical portion 11 and the inner cylindrical portion 12, and also a rotation center line of the rotation shaft 2a.
  • a V groove 11a on which a V belt is hung is formed on the outer peripheral side of the outer cylindrical portion 11.
  • An outer race of the ball bearing 14 is fixed to the inner peripheral side of the inner cylindrical portion 12.
  • the ball bearing 14 is for rotatably fixing the rotor 10 to the housing forming the outer shell of the compressor 2. Therefore, the inner race of the ball bearing 14 is fixed to a housing boss portion 2 b provided on the housing of the compressor 2.
  • the wall portion 13 has one end surface 13a and the other end surface 13b disposed on one side and the other side in the axial direction of the rotation center line O, respectively, and these end surfaces 13a and 13b are mutually in the axial direction. In addition to being separated from each other, they extend in a direction perpendicular to the axial direction.
  • the wall portion 13 is formed with a plurality of arc-shaped demagnetization slits 13c and 13d arranged in two rows in the radial direction when viewed from the axial direction.
  • the demagnetization slits 13c and 13d extend through the wall portion 13 in the axial direction.
  • One end surface 13a of the wall 13 faces the armature 20 and becomes a friction surface of the rotor 10 that comes into contact with the armature 20 when the rotor 10 and the armature 20 are connected. Therefore, hereinafter, one end surface 13a of the wall portion 13 is also referred to as a friction surface 13a.
  • a friction member 15 for increasing the friction coefficient of the wall portion 13 is disposed on a part of the friction surface 13a of the wall portion 13.
  • the friction member 15 is made of a nonmagnetic material. Specifically, a material obtained by solidifying alumina with a resin or a sintered material of metal powder such as aluminum powder can be used.
  • the armature 20 is made of a magnetic material such as iron.
  • the armature 20 is a disk-shaped member that extends in a direction orthogonal to the rotation center line O and has a through hole that penetrates the front and back in the axial direction at the center.
  • the armature 20 has one end face 20a and the other end face 20b disposed on one side and the other side in the axial direction of the rotation center line O, respectively.
  • the rotation center of the armature 20 is disposed coaxially with the rotation shaft 2 a of the compressor 2. That is, the rotation center line of the armature 20 coincides with the rotation center line O.
  • the armature 20 is formed with a plurality of arc-shaped demagnetization slits 20c when viewed from the axial direction, like the wall portion 13 of the rotor 10.
  • the demagnetization slit 20c passes through one end surface 20a and the other end surface 20b of the armature 20.
  • the demagnetization slit 20 c is positioned between the demagnetization slit 13 c on the inner side in the radial direction of the wall portion 13 and the demagnetization slit 13 d on the outer side in the radial direction of the wall portion 13.
  • one end face 20a of the armature 20 faces the friction surface 13a of the rotor 10, and forms a friction surface that comes into contact with the rotor 10 when the rotor 10 and the armature 20 are connected. Therefore, hereinafter, one end surface 20a of the armature 20 is also referred to as a friction surface 20a of the armature 20. Further, a substantially disc-shaped outer hub 21 is fixed to the other end surface 20 b of the armature 20.
  • the outer hub 21 constitutes a connecting member for connecting the armature 20 and the rotating shaft 2a of the compressor 2 together with an inner hub 22 described later.
  • the outer hub 21 and the inner hub 22 have cylindrical portions 21 a and 22 a that extend in the axial direction of the rotation center line O, respectively, and the inner peripheral surface of the cylindrical portion 21 a of the outer hub 21 and the cylindrical portion 22 a of the inner hub 22.
  • a cylindrical rubber 23 which is an elastic member made of an elastic material (elastomer) is vulcanized and bonded to the outer peripheral surface.
  • the inner hub 22 is fixed by being tightened by a bolt 24 in a screw hole provided in the rotary shaft 2a of the compressor 2. That is, the inner hub 22 is configured to be connectable to the rotary shaft 2 a of the compressor 2.
  • the armature 20, the outer hub 21, the rubber 23, the inner hub 22, and the rotary shaft 2a of the compressor 2 are connected.
  • the armature 20, the outer hub 21, the rubber 23, the inner hub 22, and the rotation shaft 2 a of the compressor 2 rotate together with the rotor 10.
  • the rubber 23 applies an elastic force to the outer hub 21 in a direction away from the rotor 10. Due to this elastic force, when the rotor 10 and the armature 20 are separated from each other, a predetermined gap is formed between the friction surface 20 a of the armature 20 connected to the outer hub 21 and the friction surface 13 a of the rotor 10. Is done.
  • the stator 30 is a non-rotating body, which is fixed to the compressor 2 in this embodiment and does not rotate.
  • the stator 30 is disposed in the inner space 100 of the rotor 10 surrounded by the outer cylindrical portion 11, the inner cylindrical portion 12 and the wall portion 13 of the rotor 10. For this reason, the stator 30 is opposed to the other end surface 13 b of the wall portion 13, and a space 101 is formed between the stator 30 and the other end surface 13 b of the wall portion 13.
  • the stator 30 includes a cylindrical stator cylindrical portion 31 centering on the rotation center line O and an end of the stator cylindrical portion 31 on the side opposite to the armature (right side in FIGS. 3 and 5). And a stator wall portion 32 extending in a direction perpendicular to the rotation center line O from the portion toward the radial outer side of the stator cylindrical portion 31, and the cross-sectional shape is L-shaped.
  • This cross section is a cross section obtained by cutting the stator 30 along the radial direction of the stator 30.
  • the stator cylindrical portion 31 and the stator wall portion 32 are formed integrally, that is, continuously with the same material, and are made of a magnetic material such as iron.
  • the stator 30 holds an electromagnetic coil 34.
  • an annular plate-shaped spool 33 perpendicular to the rotation center line O is press-fitted on the outer peripheral surface of the stator cylindrical portion 31. It is fixed.
  • the spool 33 referred to here suppresses the side surface of the wound electromagnetic coil 34.
  • An electromagnetic coil 34 is directly wound (directly wound) around the stator cylindrical portion 31.
  • the electromagnetic coil 34 is disposed in a space 300 surrounded by the stator cylindrical portion 31, the stator wall portion 32, and the spool 33. That is, the electromagnetic coil 34 is disposed on the outer side in the radial direction of the stator cylindrical portion 31 with respect to the stator cylindrical portion 31.
  • the electromagnetic coil 34 is fixed to the stator 30 by being directly wound around the stator cylindrical portion 31.
  • a connector is connected to the electromagnetic coil 34.
  • the stator 30 is formed with a connector take-out portion 321 for taking out the connector.
  • the arm support 40 functions as a fixing member for fixing the stator 30 to the compressor 2, and is fixed to the compressor 2 and supports the stator 30.
  • the arm support 40 includes an annular plate-like plate portion 41 and a cylindrical support cylindrical portion 42 centering on the rotation center line O, and the cross-sectional shape is reversed. It is L-shaped.
  • This cross section is a cross section obtained by cutting the arm support 40 along the radial direction of the arm support 40.
  • the plate part 41 and the support cylindrical part 42 are integrally formed and are made of a magnetic material such as iron.
  • the arm support 40 is used as an example of a separate member formed of a member separate from the stator 30, and the support cylindrical portion 42 constitutes a separate cylindrical portion of the present disclosure.
  • the plate portion 41 extends in a direction orthogonal to the rotation center line O and is parallel to the stator wall portion 32.
  • the plate portion 41 is fixed to the end surface 32a opposite to the armature in the axial direction of the rotation center line O of the stator wall portion 32 by a fastening member such as a rivet.
  • the plate portion 41 is fixed to the housing of the compressor 2.
  • the housing of the compressor 2 constitutes a part of the driven device. Therefore, the plate part 41 is directly fixed to the driven device.
  • the plate portion 41 is formed with a connector take-out portion 411 for taking out a connector (not shown) connected to the electromagnetic coil 34.
  • the support cylindrical portion 42 extends from the end portion of the plate portion 41 to the armature side with respect to the stator wall portion 32. Therefore, as shown in FIG. 3, the support cylindrical portion 42 is disposed outside the electromagnetic coil 34 in the radial direction of the stator cylindrical portion 31 so as to cover the outer periphery of the electromagnetic coil 34.
  • a resin member 35 that seals the electromagnetic coil 34 is provided between the support cylindrical portion 42 and the stator 30.
  • the resin member 35 is made of polyamide resin or the like.
  • the plate portion 41 is in contact with the end surface 32 a in the axial direction of the stator wall portion 32, and the support cylindrical portion 42 is the end surface on the radially outer side of the stator wall portion 32. It is in contact with 32b (radial end surface).
  • the end surface 32a in the axial direction is an end surface on the side away from the armature of the stator wall portion 32 in the axial direction of the rotation center line O (the side opposite to the armature).
  • stator 30 and the support cylindrical portion 42 are arranged in the internal space 100 of the rotor 10 in a state of being combined with each other.
  • the stator cylindrical portion 31 faces the inner cylindrical portion 12 of the rotor 10 via a gap.
  • the support cylindrical portion 42 is opposed to the outer cylindrical portion 11 of the rotor 10 via a gap.
  • the operation of the electromagnetic clutch 1 having the above configuration will be described.
  • the electromagnetic coil 34 When the electromagnetic coil 34 is energized, the armature 20 is attracted to the friction surface 13a of the rotor 10 by the electromagnetic attractive force generated by the electromagnetic coil 34, and the rotor 10 and the armature 20 are connected. Thereby, the rotational power from the engine is transmitted to the compressor 2.
  • the assembly process of the stator 30 and the electromagnetic coil 34 in the present embodiment and the assembly process of the stator and the electromagnetic coil in the comparative example 1 will be described.
  • the assembly process of the stator 30 and the electromagnetic coil 34 is a part of the manufacturing method of the electromagnetic clutch 1 of this embodiment.
  • 8A, 8B, 8C, and 8D show the assembly process of the stator and the electromagnetic coil in the first comparative example.
  • Comparative Example 1 is an example using a stator J30 having a U-shaped cross section.
  • the stator J30 includes an inner cylindrical portion J31 corresponding to the stator cylindrical portion 31 of the present embodiment, a stator wall portion J32 corresponding to the stator wall portion 32 of the present embodiment, and an outer cylinder disposed outside the inner cylindrical portion J31. Part J33.
  • the outer cylindrical portion J33 is formed integrally with the inner cylindrical portion J31 and the stator wall portion J32.
  • An annular plate-shaped arm support J40 is fixed in advance to the stator wall J32.
  • the spool J34 has a cylindrical tube portion J341 and a pair of side walls J342 and J343 connected to both ends of the tube portion.
  • the cylinder portion J341 is a portion around which the electromagnetic coil J35 is wound.
  • One side wall J342 corresponds to the spool 33 of the present embodiment.
  • the spool J34 is made of resin.
  • the internal space J300 is a space surrounded by the inner cylindrical portion J31, the stator wall portion J32, and the outer cylindrical portion J33.
  • a step of sealing the electromagnetic coil J35 with the resin member J36 is performed. In this way, the assembly of the electromagnetic coil J35 to the stator J30 is completed.
  • FIGS. 9A, 9B, and 9C are sequentially performed.
  • a step of preparing the stator 30 and the arm support 40 is performed.
  • a spool 33 is fixed to the stator 30 in advance.
  • stator 30 around which the electromagnetic coil 34 is wound is inserted into the support cylindrical portion 42 of the arm support 40.
  • stator wall portion 32 and the plate portion 41 of the arm support 40 are fixed using rivets, and the electromagnetic coil 34 is sealed with the resin member 35.
  • the assembly of the electromagnetic coil 34 to the stator 30 is completed. That is, the manufacture of the stator 30 is completed. And other parts, such as the rotor 10 and the armature 20, are manufactured, and the electromagnetic clutch 1 is manufactured.
  • Comparative Example 1 after winding the electromagnetic coil J35 around the spool J34, the spool J34 is inserted into the internal space J300 of the stator J30, whereas in this embodiment, the electromagnetic coil 34 is attached to the stator 30.
  • the present embodiment is different from Comparative Example 1 in that the stator 30 is assembled to the arm support 40.
  • a stator 30 having an L-shaped cross section is used.
  • the shape of the stator 30 is simplified, manufacture of the stator 30 by press work becomes easy. As a result, the manufacturing cost of the electromagnetic clutch 1 can be reduced.
  • stator 30 having the L-shaped cross section and the arm support 40 having the inverted L-shaped cross section having the support cylindrical portion 42 are used, and the cylindrical portion outside the electromagnetic coil 34 is the stator 30. It is composed of a separate member.
  • the electromagnetic coil 34 can be directly wound around the stator cylindrical portion 31 of the stator 30.
  • the arm support 40 can be assembled after the electromagnetic coil 34 is wound directly around the stator cylindrical portion 31.
  • the electromagnetic coil 34 is directly wound around the stator cylindrical portion 31.
  • the electromagnetic coil is wound around the cylindrical portion of the spool, and the thickness of the cylindrical portion of the spool around which the electromagnetic coil is wound is compared with the case where the spool around which the electromagnetic coil is wound is assembled to the stator.
  • the radial dimension of the coil space in the radial direction can be enlarged.
  • the electromagnetic coil when the electromagnetic coil is wound around the cylindrical part of the spool, since the spool is generally made of resin, the heat dissipation of the electromagnetic coil is deteriorated.
  • the electromagnetic coil 34 since the electromagnetic coil 34 is wound directly around the stator cylindrical portion 31, heat dissipation from the electromagnetic coil 34 to the stator 30 becomes smooth, and the coil heat dissipation is improved.
  • Comparative Example 1 is shown in FIG. 8D described above, and uses a stator having a U-shaped cross section.
  • the outer cylindrical portion J33 of the stator J30 faces the outer cylindrical portion 11 of the rotor 10 with a gap in a state where the stator J30 is disposed in the inner space 100 of the rotor 10.
  • Comparative Example 2 is the same as the present embodiment in that an L-shaped stator 30 is used, but is different from the present embodiment in that the support cylindrical portion 42 of the arm support 40 is not provided. It is.
  • Comparative Example 2 in a state where the stator 30 is disposed in the internal space 100 of the rotor 10, the end surface 32 b in the radial direction of the stator wall portion 32 faces the outer cylindrical portion 11 of the rotor 10 via a gap.
  • Comparative Example 2 compared with Comparative Example 1, the radial dimension of the coil space can be increased by eliminating the outer cylindrical portion J33 in the stator J30 having a U-shaped cross section.
  • the facing area between the outer cylindrical portion 11 of the rotor 10 and the stator 30 may be small.
  • Comparative Example 2 compared with Comparative Example 1, in the gap between the outer cylindrical portion 11 of the rotor 10 and the stator wall portion 32, the magnetic flux density is increased, that is, the magnetic resistance is increased and the magnetic resistance is increased.
  • the amount of magnetic flux flowing through the entire circuit was reduced by 15%.
  • the amount of magnetic flux flowing through the friction surface 13a of the rotor 10 and the friction surface 20a of the armature 20 is also reduced by 15%.
  • the suction force F ′ of Comparative Example 2 is expressed by the following equation.
  • transmission torque capability falls.
  • the stator 30 and the support cylindrical portion 42 having an L-shaped cross section are disposed in the inner space 100 of the rotor 10, and the support cylindrical portion 42 is disposed in the outer cylindrical portion 11 of the rotor 10 via a gap. They are facing each other. Since the arm support 40 including the support cylindrical portion 42 is in contact with the stator 30, the magnetic resistance between the arm support 40 and the stator 30 is lower than that of the member separated from the stator 30. Therefore, the support cylindrical portion 42 can be regarded as a part of the stator 30.
  • the opposing area of the outer cylindrical portion 11 of the rotor 10 and the stator 30 can be substantially increased.
  • the opposed area between the outer cylindrical portion 11 of the rotor 10 and the stator 30 can be substantially brought close to the opposed area of the outer cylindrical portion 11 of the rotor 10 and the outer cylindrical portion J33 of the stator J30 of Comparative Example 1. .
  • the support cylindrical portion 42 is disposed in the inner space 100 of the rotor 10, and the support cylindrical portion 42 is opposed to the outer cylindrical portion 11 of the rotor 10 via a gap.
  • the support cylindrical portion 42 corresponds to the outer cylindrical portion J33 of the stator J30 of Comparative Example 1, and the electromagnetic clutch 1 of the present embodiment has a structure similar to that of the electromagnetic clutch J1 of Comparative Example 1. Yes. Therefore, when the electromagnetic clutch 1 of the present embodiment is employed, there are few changes to the electromagnetic clutch J1 of the comparative example 1.
  • the support cylindrical portion 42 is disposed on the side opposite to the armature from the stator wall portion 32, and the outer cylindrical portion 11 of the rotor 10 is disposed on the anti-armature. It is conceivable that a cylindrical portion connected to the outer cylindrical portion 11 is separately added to the outer cylindrical portion 11 on the side opposite to the armature side of the outer cylindrical portion 11. However, in this case, if it is intended to ensure a sufficient area facing the outer cylindrical portion 11 of the rotor 10, for example, the axial length of the rotor 10 may be increased.
  • the support cylindrical part 42 is provided in the arm support 40 and the support cylindrical part 42 is disposed in the internal space 100 of the rotor 10, the axial length of the rotor 10 is increased. Can be avoided.
  • the cylindrical portion (support cylindrical portion) 42 outside the electromagnetic coil 34 is configured as a part of the arm support 40, and thus the cylindrical portion 42 is configured separately from the arm support 40. Compared with the case where it does, the increase in a number of parts can be suppressed and the increase in the number of processes can be suppressed in the assembly of the stator 30.
  • the cylindrical portion outside the electromagnetic coil 34 is configured by a member different from the arm support 40, and the other configurations are the same as those in the first embodiment.
  • the shape of the arm support 40 is changed to a shape having only the plate portion 41 of the arm support 40 of the first embodiment.
  • the arm support 40 is fixed to an end face in the axial direction of the stator wall portion 32 by a fastening member such as a rivet (not shown) at 32 a and is fixed to the housing of the compressor 2.
  • a separate member 50 is provided separately from the arm support 40.
  • the separate member 50 has a shape having only the cylindrical portion 51.
  • the separate member 50 is made of a magnetic material such as iron.
  • the cylindrical portion 51 corresponds to the support cylindrical portion 42 of the first embodiment, and constitutes a separate cylindrical portion of the present disclosure.
  • the cylindrical portion 51 is fixed to the stator 30 by press-fitting the stator 30 into the cylindrical portion 51. For this reason, the cylindrical portion 51 is in contact with the end surface 32 b in the radial direction of the stator wall portion 32.
  • the separate member 50 of the present embodiment is used instead of the arm support 40 of the first embodiment, so that the stator 30 can be used. Assembling of the electromagnetic coil 34 is performed. Assembling of the arm support 40 to the stator 30 may be performed either before the electromagnetic coil 34 is wound or after the stator 30 and the separate member 50 are assembled.
  • the stator 30 and the cylindrical portion 51 having an L-shaped cross section are used, the effects (1) to (5) described in the first embodiment are achieved.
  • the cylindrical portion outside the electromagnetic coil 34 is configured by a member different from the arm support 40, and the other configurations are the same as those in the first embodiment.
  • a separate member 60 having a plate-like plate portion 61 and a cylindrical cylindrical portion 62 is provided separately from the arm support 40.
  • the separate member 60 is made of a magnetic material such as iron.
  • the cylindrical portion 62 corresponds to the support cylindrical portion 42 of the arm support 40 of the first embodiment, and constitutes a separate cylindrical portion of the present disclosure.
  • the plate portion 61 is formed integrally with the cylindrical portion 62 and extends in a direction orthogonal to the rotation center line O.
  • the shape of the arm support 40 is the same as in the second embodiment.
  • the arm support 40 is fixed to the stator wall portion 32 and the plate portion 61 by a fastening member such as a rivet (not shown).
  • the separate member 60 of the present embodiment is used instead of the arm support 40 of the first embodiment, so that the stator 30 can be used. Assembling of the electromagnetic coil 34 is performed. Assembling of the arm support 40 to the stator 30 is performed after the stator 30 and the separate member 60 are assembled.
  • stator 30 having the L-shaped cross section and the cylindrical portion 62 are used, the effects (1) to (5) described in the first embodiment are produced.
  • the separate member 60 of this embodiment is in contact with both the end surface 32b in the radial direction of the stator wall portion 32 and the end surface 32a in the axial direction, and is in contact with only the end surface 32b in the radial direction of the stator wall portion 32.
  • the contact area is wide.
  • minute irregularities exist on the contact surface, a minute gap exists between the contact surfaces facing each other. This minute gap increases the magnetic resistance of the contact portion.
  • the magnetic resistance between the stator 30 and the separate member 60 can be reduced by increasing the contact area.
  • the arm support 40 is in contact with both the end face 32b in the radial direction of the stator wall portion 32 and the end face 32a in the axial direction, so the same can be said.
  • a spool 36 is disposed between the electromagnetic coil 34 and the stator 30, and other configurations are the same as those in the first embodiment.
  • the spool 36 is a wound member around which the electromagnetic coil 34 is wound.
  • the spool 36 is made of a resin material.
  • the spool 36 functions as an example of an insulating member that insulates the electromagnetic coil 34 and the stator 30.
  • the spool 36 has a cylindrical spool cylindrical portion 361 centered on the rotation center line O, and a pair of side walls 362 and 363 connected to both ends of the spool cylindrical portion 361.
  • the side walls 362 and 363 extend outward in the radial direction of the spool cylindrical portion 361.
  • the spool 36 has a U-shaped cross section. This cross section is a cross section obtained by cutting the spool 36 along the radial direction of the spool 36.
  • the spool 36 is fixed to the stator 30 in a state where the spool cylindrical portion 361 is disposed on the radially outer side of the stator cylindrical portion 31.
  • the electromagnetic coil 34 is wound around the spool cylindrical portion 361. Therefore, the electromagnetic coil 34 is wound around the stator cylindrical portion 31 via the spool 36.
  • the conducting wire constituting the electromagnetic coil 34 is covered with a covering material made of an insulating material such as a resin material. For this reason, the electromagnetic coil 34 is insulated from the stator 30.
  • FIGS. 16A, 16B, and 16C are sequentially performed.
  • a step of preparing the stator 30 and the arm support 40 is performed.
  • a spool 36 is fixed to the stator 30.
  • the spool 36 is fixed in a state where it is press-fitted into the stator 30.
  • the spool 36 may be integrally molded with the stator 30.
  • a process of winding the electromagnetic coil 34 around the spool 36 is performed. Accordingly, the electromagnetic coil 34 is disposed on the outer side in the radial direction of the stator cylindrical portion 31 with respect to the stator cylindrical portion 31. The electromagnetic coil 34 is fixed to the stator 30.
  • the stator 30 around which the electromagnetic coil 34 is wound is inserted into the support cylindrical portion 42 of the arm support 40.
  • the subsequent steps are the same as in the first embodiment.
  • stator 30 and the arm support 40 having an L-shaped cross section are used.
  • winding is performed in a state where the spool 36 is reinforced by the stator cylindrical portion 31.
  • strength of the spool 36 can be lowered
  • the radial dimension of the coil space in the radial direction of the stator 30 can be expanded.
  • the thickness of the spool 36 is shown to be thicker than the actual thickness.
  • the spool cylindrical portion 361 is interposed between the electromagnetic coil 34 and the stator cylindrical portion 31.
  • a side wall 363 is interposed between the electromagnetic coil 34 and the stator wall portion 32.
  • the spool 36 is interposed between the electromagnetic coil 34 and the stator 30.
  • a resin member made of a resin material is used as an example of an insulating member that insulates the electromagnetic coil 34 and the stator 30.
  • a member made of a material other than the resin material may be used. Good.
  • a part of the assembly process of the stator 30 and the electromagnetic coil 34 is changed with respect to the fourth embodiment.
  • a step of preparing a spool 36 around which an electromagnetic coil 34 is wound, a stator 30, and an arm support 40 is performed.
  • the thickness of the spool 36 may be the same as that of the spool in an electromagnetic clutch using a stator having a U-shaped cross section.
  • FIG. 17B a process of fixing the spool 36 around which the electromagnetic coil 34 is wound to the stator 30 is performed.
  • the stator cylindrical portion 31 is inserted inside the spool cylindrical portion 361.
  • the electromagnetic coil 34 is arranged on the outer side in the radial direction of the stator cylindrical portion 31 with respect to the stator cylindrical portion 31 with respect to the stator cylindrical portion 31.
  • the electromagnetic coil 34 is fixed to the stator 30.
  • stator 30 and the arm support 40 having an L-shaped cross section are used.
  • a spool 36 is interposed between the electromagnetic coil 34 and the stator 30.
  • the insulation with respect to the stator 30 of the electromagnetic coil 34 can be improved similarly to 4th Embodiment.
  • both the plate portion 41 and the support cylindrical portion 42 of the arm support 40 are in contact with the stator wall portion 32, but only one of the plate portion 41 and the support cylindrical portion 42 is the stator wall portion 32. May be in contact with.
  • a cylindrical spool 36 is interposed between the electromagnetic coil 34 and the stator 30. That is, in the fourth embodiment, the insulating member is interposed between the stator 30 and the electromagnetic coil 34 over the entire circumferential direction of the stator cylindrical portion 31 and the stator wall portion 32.
  • the present invention is not limited to this.
  • An insulating member may be interposed between the stator 30 and the electromagnetic coil 34 in only a part of the circumferential direction of the stator cylindrical portion 31 and the stator wall portion 32.

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

Abstract

Selon l'invention, un stator (30) en forme de L en plan transversal, possède une partie cylindrique de stator (31) et une partie paroi de stator (32). Une bobine électromagnétique (34) est disposée côté externe dans la direction radiale de la partie cylindrique de stator (31). Une partie cylindrique de support (42) d'un support de bras (40), est disposée côté externe de la bobine électromagnétique (34) de manière à recouvrir la périphérie externe de cette dernière, par rapport au stator (30) en forme de L en plan transversal dans lequel est disposée la bobine électromagnétique (34). La partie cylindrique de support (42) est mise en opposition par rapport à une partie cylindrique côté externe (11) du rotor (10) avec l'intermédiaire d'un vide. Ainsi, en comparaison avec un cas où une face extrémité (32b) dans la direction radiale de la partie paroi de stator (32), est mise en opposition par rapport à la partie cylindrique côté externe (11) du rotor (10) avec l'intermédiaire d'un vide, les surfaces opposées de la partie cylindrique côté externe (11) du rotor (10) et du stator (30), peuvent être sensiblement augmentées, et il est ainsi possible d'empêcher une baisse de capacité de couple de transmission.
PCT/JP2015/006304 2014-12-25 2015-12-17 Embrayage électromagnétique, et procédé de fabrication de celui-ci WO2016103665A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2014262226 2014-12-25
JP2014-262226 2014-12-25
JP2015-230898 2015-11-26
JP2015230898A JP2016121802A (ja) 2014-12-25 2015-11-26 電磁クラッチおよびその製造方法

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09303425A (ja) * 1996-05-17 1997-11-25 Matsui Kogyo:Kk 電磁クラッチ用コア
JP2006064114A (ja) * 2004-08-27 2006-03-09 Sanden Corp 電磁クラッチ

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09303425A (ja) * 1996-05-17 1997-11-25 Matsui Kogyo:Kk 電磁クラッチ用コア
JP2006064114A (ja) * 2004-08-27 2006-03-09 Sanden Corp 電磁クラッチ

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