JP4868851B2 - Electric motor - Google Patents

Description

  The present invention relates to an electric motor, and more particularly to an electric motor suitable for an electric motor built in a hybrid compressor used in a vehicle air conditioner.

  Conventionally, a stator of an electric motor is formed as shown in FIG. In FIG. 8, reference numeral 100 denotes an electric compressor, and an electric motor 102 is accommodated in a housing 101 of the electric compressor 100. The electric motor 102 includes a rotor 103 and a stator 104 provided outside the rotor 103. The stator 104 has a plurality of bobbins 105, and each bobbin 105 is arranged in a substantially circumferential shape. An input conducting wire 106 is wound around the bobbin 105, and a coil portion 107 is formed by the conducting wire 106. The input conductor 106 is connected to an external power supply terminal 108, and the connecting portion 109 is housed in a hollow projecting portion 110 integrated with the housing 101.

  In such an electric motor 102, the input conducting wire 106 is routed along the circumferential direction of the stator 104, and the conducting wire 106 may come into contact with other peripheral members. For this reason, a method of binding the conductive wire 106 to the insulating member 112 constituting the stator 104 with the binding member 111 has been adopted.

  However, if the conducting wire 106 is bound using the binding member 111, the assembling workability may be significantly reduced. Further, in order to improve the vibration resistance and the effect of preventing contact with other members, it is necessary to increase the number of binding locations using a large number of binding materials 111, but in this case, the degree of freedom of the lead wire is reduced, Assembly workability may be further reduced.

In addition, although the proposal like patent document 1 is made | formed as a holding | maintenance method of the coil part of a stator, it is not yet proposed about holding | maintenance of an input conducting wire.
JP 2003-199277 A

  It is an object of the present invention to provide an electric motor that can reliably prevent variations in input lead wires to the stator and contact with other members, improve the reliability and durability of the device, and improve the assembly workability. is there.

In order to solve the above problems, an electric motor according to the present invention, have a conductor are arrayed on the inner peripheral side bobbin coil portion wound is formed stator is accommodated in the electric compressor in the electric motor ing from the internal electric motor, it said that the axial end portion of the stator via a lock mechanism engaged detachably engaged, providing a holding member for holding the input leads to at least the coil portions, to the holding member The storage portion for storing the input conductor to each coil portion is provided along the circumferential direction of the stator, and the storage portion is gradually formed along the circumferential direction of the stator from the introduction side of the conductor of the stator. It consists of what is characterized by the narrowness. In such a configuration, the holding member is engaged with the end portion in the axial direction of the stator via the lock mechanism, so that it is possible to reliably prevent variations in the input lead wires to the stator and contact with other members. In addition, since the holding member can be easily attached to and detached from the stator, the assembling workability of the stator, and further the assembling workability of the stator to the electric motor can be improved.

The holding member is provided with a storage portion for storing an input lead to each coil portion along the circumferential direction of the stator, and the storage portion is gradually formed from the introduction side of the stator lead along the circumferential direction of the stator. the width that has become narrower. Providing such a storage portion can more reliably prevent variations in input conductors and contact with other members. Moreover, the said accommodating part can be easily formed from the groove | channel etc. which were provided in the holding member, for example.

  The holding member can be formed in a donut shape. Moreover, it is preferable that the inner peripheral side and / or the outer peripheral side of the holding member formed in a donut shape are gradually projected in the radial direction toward the introduction side of the input conductor. In other words, when the bobbins on which the coil portions are formed are arranged in a circumferential shape, the input conducting wire is routed in the circumferential direction, and there are many conducting wires on the introduction side of the input conducting wire in the circumferential direction. Gradually decreases. Therefore, if the inner periphery side and / or the outer periphery side of the holding member formed in a donut shape is formed so as to gradually protrude in the radial direction toward the introduction side of the input conductor, the number of the input conductors is increased. The conducting wire holding area of the holding member can be changed. Therefore, even when the radial dimension of the stator increases, it is possible to minimize the increase in cost associated with the increase in the size and weight of the holding member.

  The locking mechanism between the stator and the holding member is not particularly limited. For example, the stator and the holding member can be configured to include a claw provided on the stator or the holding member and a hole formed on the other side and engaged with the claw. .

The electric motor according to the present invention is applied to an electric compressor in which the electric motor is accommodated . Moreover , it is applicable also to what is called a hybrid compressor. For example, a first compression mechanism that is driven only by a first drive source different from the built-in electric motor and a second compression mechanism that is driven only by the built-in electric motor as a second drive source are arranged side by side. The present invention can also be applied to a case where the compressor is composed of an assembled hybrid compressor.

  An example of the first drive source is a vehicle prime mover.

  In such an electric motor according to the present invention, since the holding member is engaged with the axial end portion of the stator via the lock mechanism, variations in the input lead wires to the stator and contact with other members are ensured. Can be prevented. Further, since the holding member can be easily attached to and detached from the stator, the assembling workability of the stator, and consequently the assembling workability of the stator electric motor can be improved.

Hereinafter, preferred embodiments of an electric motor of the present invention will be described with reference to the drawings.
FIG. 1 shows an electric compressor in which an electric motor according to an embodiment of the present invention is housed. In this embodiment, the electric compressor is composed of a hybrid compressor. In FIG. 1, reference numeral 1 denotes a hybrid compressor.

  First, the hybrid compressor shown in FIG. 1 will be described. The hybrid compressor 1 is a scroll type compressor, and has a first compression mechanism 2 and a second compression mechanism 3. The first compression mechanism 2 engages with a fixed scroll 4 and a movable scroll 6 that meshes with the fixed scroll 4 to form a plurality of working spaces (fluid pockets) 5 to rotate the movable scroll 6. And an electromagnetic clutch 9 for turning on / off driving force transmission between a pulley 8 to which power from a prime mover (not shown) for vehicle travel (not shown) as a first drive source is transmitted, and a movable scroll 6 Are provided with a ball coupling 10 for preventing rotation and a suction port 12 formed in the casing 11. The compressed fluid (for example, refrigerant gas) sucked into the suction chamber 14 from the suction port 12 through the suction passage 13 is taken into the working space 5, and the working space 5 decreases in volume to the center of the fixed scroll 4. The refrigerant gas in the working space 5 is compressed by being moved toward. A discharge hole 15 is formed at the center of the fixed scroll 4, and the compressed refrigerant gas flows out to the high pressure side of the external refrigerant circuit via the discharge hole 15, the discharge passage 16 and the discharge port 17.

  On the other hand, the second compression mechanism 3 includes a fixed scroll 18, a movable scroll 20 that meshes with the fixed scroll 18 to form a plurality of working spaces (fluid pockets) 19, and engages with the movable scroll 20 to move the movable scroll 20. A drive shaft 21 that rotates is provided and a ball coupling 22 that prevents the movable scroll 20 from rotating. In order to drive the drive shaft 21 of the second compression mechanism 3, an electric motor 27 as will be described later is incorporated. In the second compression mechanism 3, the fluid to be compressed (for example, refrigerant gas) sucked from the suction port 12 into the suction chamber 14 of the first compression mechanism 2 passes through the communication passage 23 and is in the suction chamber of the second compression mechanism 3. The refrigerant gas in the working space 19 is compressed by being sucked into 24 and taken into the working space 19 and moving toward the center of the fixed scroll 18 while reducing the volume. The fixed scroll 18 flows out to the high pressure side of the external refrigerant circuit through the discharge hole 25 and the discharge passage 16 at the center. The discharge holes 15 and 25 are opened and closed by a ball valve 26.

  In this embodiment, the fixed scroll 4 of the first compression mechanism 2 and the fixed scroll 18 of the second compression mechanism 3 are arranged back to back, and the fixed scrolls 4 and 18 are integrated as a fixed scroll member 42. Is formed.

  When only the first compression mechanism 2 of the hybrid compressor 1 is operated, no electric power is supplied to the electric motor 27 that drives the second compression mechanism 3, and the electric motor 27 does not rotate. Therefore, the second compression mechanism 3 does not operate. When the hybrid compressor 1 is driven only by the electric motor 27, the electric motor 27 is turned on and rotates, and the rotation of the electric motor 27 is transmitted to the drive shaft 21 of the second compression mechanism 3. The movable scroll 20 is turned. At this time, the electromagnetic clutch 9 of the first compression mechanism 2 is not energized, and the rotation of the vehicle prime mover as the first drive source is not transmitted to the first compression mechanism 2. Therefore, the first compression mechanism 2 does not operate. When both the compression mechanisms 2 and 3 are driven at the same time, the driving force from the vehicle prime mover is transmitted to the movable scroll 6 of the first compression mechanism 2, and the electric motor 27 is turned on so that the driving force is the second. It is transmitted to the movable scroll 20 of the compression mechanism 3.

  In the hybrid compressor 1 configured as described above, the electric motor 27 has a fixed rotor 28 fixed to the drive shaft 21 and a stator 29, and the stator 29 is fixed to the stator housing 30. In addition, the entire electric motor 27 is accommodated in the stator housing 30.

  As shown in FIG. 2, the stator 29 has a plurality of bobbins 31, and each bobbin 31 is arranged in a substantially circumferential shape. An input conducting wire 32 is wound around the bobbin 31, and a coil portion 33 is formed by the conducting wire 32. The input lead wire 32 is connected to a power supply external terminal 34, and both connecting portions 35 are accommodated in a hollow projecting portion 36 integrated with the stator housing 30.

  A holding member 38 that holds each coil portion 33 and the input conducting wire 32 is engaged with the end portion of the stator 29 in the axial direction. In the present embodiment, the holding member 38 is made of resin and is formed in a donut shape as shown in FIG. As shown in FIGS. 6 and 7, a claw 39 is provided at the edge of the holding member 38. On the other hand, the bobbin 31 of the stator 29 is provided with a hole 40 with which the claw 33 is engaged. The holding member 38 is engaged with the stator 29 by fitting the claw 39 into the hole 40. In this embodiment, the claw 39 and the hole 40 constitute the lock mechanism 43. In FIG. 2, the holding member 38 is not shown in cross section, but is hatched to clearly show the holding member 38 with respect to other members.

  The holding member 38 is provided with a storage portion 41 in which the input conducting wire 32 is stored. In the present embodiment, the storage portion 41 is formed from a groove and extends in the circumferential direction of the holding member 38.

  The input conducting wire 32 connected to the power supply external terminal 34 is routed along the circumferential direction of the stator 29, and the introduced input conducting wire 32 is wound around each bobbin 31 arranged circumferentially. A coil portion 33 is formed. For this reason, on the lead wire introduction side 37 of the stator 29, the number of input lead wires 32 is large, and the number of input lead wires 32 gradually decreases along the circumferential direction of the stator 29. For this reason, as shown in FIGS. 4 and 5, the width of the storage portion 41 gradually decreases from the lead-in side 37 of the conductor of the stator 29 along the circumferential direction of the stator 29. Further, the inner peripheral side of the holding member 38 formed in a donut shape is formed in a shape that gradually protrudes inward in the radial direction along the circumferential direction of the stator 29 from the conductive wire introduction side 37 of the stator 29.

  In the present embodiment, the holding member 38 is detachably engaged with the axial end portion of the stator 29 via the lock mechanism 43, and each coil portion 33 and the input conductor 32 are held. It is possible to reliably prevent variations in the input lead wires 32 and contact with other members. In addition, since the holding member 38 can be easily attached to and detached from the stator 29, the assembling workability of the stator 29, and the assembling workability of the stator 29 to the electric motor 27 can be improved.

  In addition, since the holding member 38 is provided with the storage portion 41 in which the input lead wires 32 to the respective coil portions 33 are stored, it is possible to more reliably prevent variations in the input lead wires 32 and contact with other members. Further, the width of the storage portion 41 gradually decreases from the lead-in side 37 of the conductor of the stator 29 along the circumferential direction of the stator 29. That is, the width of the storage portion 41 is changed according to the number of input conductors 32 stored in the storage portion 41, and the input conductor 32 can be securely stored in the storage portion 41. Further, the inner peripheral side of the holding member 38 formed in a donut shape is formed in a shape that gradually protrudes inward in the radial direction along the circumferential direction of the stator 29 from the conductive wire introduction side 37 of the stator 29. Therefore, the conducting wire holding area of the holding member 38 can be changed according to the number of the input conducting wires 32. Therefore, even when the number of the conducting wires 32 to be held increases, an increase in cost due to an increase in size and weight of the holding member 38 can be suppressed to a minimum.

  The electric motor according to the present invention can be applied to an electric motor, particularly an electric motor built in an electric compressor, and is particularly suitable as an electric motor of a hybrid compressor.

1 is a longitudinal sectional view of a hybrid compressor to which an electric motor according to an embodiment of the present invention is applied. It is sectional drawing which follows the II-II line of the hybrid compressor of FIG. FIG. 3 is a III arrow view of the hybrid compressor of FIG. 2. It is sectional drawing which follows the IV-IV line of the hybrid compressor of FIG. It is sectional drawing which follows the VV line of the hybrid compressor of FIG. It is sectional drawing which follows the VI-VI line of the hybrid compressor of FIG. It is an expanded sectional view of the FIG. 6A section. It is a cross-sectional view of a compressor to which a conventional electric motor is applied.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hybrid compressor 2 1st compression mechanism 3 2nd compression mechanism 4, 18 Fixed scroll 5, 19 Working space 6, 20 Movable scroll 7, 21 Drive shaft 8 Pulley 9 Electromagnetic clutch 10, 22 Ball coupling 11 Casing 12 Suction port DESCRIPTION OF SYMBOLS 13 Suction passage 14, 24 Suction chamber 15, 25 Discharge hole 16 Discharge passage 17 Discharge port 23 Communication path 26 Ball valve 27 Electric motor 28 Rotor 29 Stator 30 Stator housing 31 Bobbin 32 Input lead 33 Coil part 34 Power supply external terminal 35 Connection Part 36 hollow projecting part 37 lead-in side 38 holding member 39 claw 40 hole 41 storage part for input lead 42 fixed scroll member 43 locking mechanism

Claims (6)

Conductors have a plurality arrayed stator on the inner peripheral side bobbin coil portion wound is formed, the electric motor ing from the internal electric motor accommodated in the electric compressor, the axial end of said stator And a holding member that holds at least an input lead to each coil part , and a holding part for storing the input lead to each coil part is provided on the holding member. The electric motor is provided along the circumferential direction of the stator, and the width of the housing portion gradually decreases along the circumferential direction of the stator from the introduction side of the conducting wire of the stator . The electric motor according to claim 1 , wherein the holding member is formed in a donut shape. The electric motor according to claim 2 , wherein an inner peripheral side and / or an outer peripheral side of the holding member formed in a donut shape are gradually projected in a radial direction toward an introduction side of the input conducting wire to a stator. The electric motor according to any one of claims 1 to 3 , wherein the lock mechanism includes a claw formed in one of the stator and the holding member and a hole formed in the other and in which the claw is locked. A first compression mechanism in which the electric compressor is driven only by a first drive source different from the built-in electric motor, and a second compression mechanism that is driven only by the built-in electric motor as a second drive source. The electric motor according to any one of claims 1 to 4, comprising a hybrid compressor arranged side by side and assembled integrally. The electric motor according to claim 5, wherein the first drive source is a motor for a vehicle.

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