JP6282506B2 - Electric compressor - Google Patents

Description

  The present invention relates to an electric compressor that is used for compressing refrigerant in a vehicle air conditioner or the like and in which a compression mechanism, an electric motor that drives the compression mechanism, and an inverter for driving the electric motor are integrated.

  In an electric compressor used in a vehicle air conditioner or the like, generally, a direct current from a vehicle battery is converted into an alternating current by an inverter and is supplied to an electric motor via a connection terminal.

  As this type of electric compressor, for example, an electric compressor described in Patent Document 1 is known. The electric compressor described in Patent Document 1 includes an electric motor having an annular stator core and a rotor, an inverter for driving a motor, and a compression mechanism driven by the electric motor. The inverter has a hermetic terminal (male terminal) as a current-carrying terminal, and this hermetic terminal is a lead wire at the end of the stator coil of the electric motor via a connection terminal (female terminal) provided in the cluster housing. Conducted with. The cluster housing is arranged on the outer peripheral surface of the stator core.

JP 2006-42409 A

  However, in the electric compressor described in Patent Document 1, since the cluster housing is arranged on the outer side in the radial direction of the stator core, the outer dimensions of the electric compressor around the trunk are increased. For this reason, there is no room for mounting the electric compressor in a vehicle or the like, and the electric compressor described in Patent Document 1 may not be used particularly when the outer dimension of the circumference of the electric compressor is severe. There is sex. Further, since the engaging groove is formed in the stator core for attaching the cluster housing, the magnetic permeability of the stator core is reduced and the imbalance thereof is caused, which may lead to a reduction in motor efficiency.

  The present invention has been made by paying attention to such a situation, and is an electric compression capable of conducting between an inverter and an electric motor without causing a decrease in motor efficiency and an increase in a waistline outer dimension. The purpose is to provide a machine.

  An electric compressor according to an aspect of the present invention is an electric compressor including an electric motor, an inverter for driving the electric motor, and a compression mechanism that is driven by the electric motor and compresses a refrigerant. The motor includes a rotor, a stator core disposed on a radially outer side of the rotor, a bobbin disposed at an end of the stator core and having electrical insulation, a coil wound around the bobbin and the stator core, A connector housing having a connection terminal for electrically connecting the inverter and the coil, the connector housing being provided on the bobbin so as to be positioned on the inner side of the outer peripheral surface of the stator core. .

According to the electric compressor having such a configuration, the electrically insulative bobbin is arranged at the end of the stator core arranged radially outside the rotor, and is electrically connected between the inverter and the coil of the electric motor. Since the connector housing having the connecting terminal is provided on the bobbin so as to be located inside the outer peripheral surface of the stator core, the connector housing can be provided so as not to protrude from the outer peripheral surface of the stator core. There is no increase in dimensions.
Since the connector housing is provided on the bobbin disposed at the end of the stator core, there is no need to process the stator core for mounting the connector housing, and the stator core permeability is reduced due to the connector housing mounting and the imbalance thereof. Thus, conduction between the inverter and the electric motor can be performed.

  In this way, it is possible to provide an electric compressor capable of conducting between the inverter and the motor without causing a decrease in motor efficiency and an increase in the outer circumference of the waistline.

It is sectional drawing of the electric compressor by one Embodiment of this invention. It is a perspective view which shows the state which assembled the stator unit of the electric compressor of the said embodiment. FIG. 3 is an exploded perspective view of the stator unit of FIG. 2. It is an enlarged view of the A section shown in FIG. It is a perspective view for demonstrating the arrangement | positioning relationship between the electricity supply terminal of the electric compressor of the said embodiment, and a connector housing. It is an enlarged view of the B section shown in FIG. It is principal part sectional drawing which showed the electricity supply terminal and connector housing shown in FIG. 6 in another cross section containing the longitudinal direction of a connector housing. It is a top view of the connector housing of the electric compressor of the above-mentioned embodiment, and is a figure showing the state before connecting terminal wearing. FIG. 9 is a side view of the connector housing as seen from the direction of arrow C shown in FIG. 8 and shows a state before the connection terminals are mounted.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a cross-sectional view of an electric compressor according to an embodiment of the present invention.
The electric compressor 100 according to the present embodiment is provided in, for example, a refrigerant circuit of a vehicle air conditioner, and sucks, compresses and discharges the refrigerant of the vehicle air conditioner. The electric motor 1 and the electric motor 1 And the compression mechanism 20 driven by the electric motor 1. The electric motor 1 is provided with a connector housing 30 for receiving power from the inverter 10.

  In the present embodiment, the electric compressor 100 is a so-called inverter-integrated compressor, and as shown in FIG. 1, a main housing 41 that houses the electric motor 1 and the inverter 10 therein, and a compression mechanism 20 It has a compression mechanism housing 42 accommodated inside, an inverter cover 43, and a compression mechanism cover 44. These (41, 42, 43, 44) are integrally joined by a joining means (not shown) such as a bolt to constitute the housing 40 of the electric compressor 100.

The main housing 41 includes an annular peripheral wall portion 41a and a partition wall portion 41b. The partition wall portion 41 b forms a partition that partitions the interior of the main housing 41 into a space that houses the electric motor 1 and a space that houses the inverter 10. The inverter 10 is accommodated in the main housing 41 through an opening on one end side (left side in FIG. 1) of the peripheral wall portion 41 a, and the opening is closed by the inverter cover 43. Further, the electric motor 1 is accommodated in the main housing 41 through an opening on the other end side (right side in FIG. 1) of the peripheral wall portion 41a, and the opening is closed by a compression mechanism housing 42 (bottom wall portion 42b described later). Is done. A cylindrical support portion 41b1 for supporting one end portion of a rotating shaft 5a, which will be described later, of the electric motor 1 is provided on the partition wall portion 41b in a radially central portion so as to project toward the other end side of the peripheral wall portion 41a. Has been.
An energizing terminal 11, which will be described later, for supplying power from the inverter 10 to the electric motor 1 passes through the partition wall 41b in a gas-liquid tight manner through a through hole formed at an appropriate position of the partition wall 41b. Yes. This gas-liquid tight structure will be described later.

  The compression mechanism housing 42 is formed in a cylindrical shape with one end opening that is open on the side opposite to the joining side with the main housing 41, and the compression mechanism 20 is accommodated in the compression mechanism housing 42 through the opening. It is like that. The opening of the compression mechanism housing 42 is closed by a compression mechanism cover 44. The compression mechanism housing 42 includes a cylindrical portion 42a and a bottom wall portion 42b at one end thereof, and the compression mechanism 20 is accommodated in a space defined by the cylindrical portion 42a and the bottom wall portion 42b. The bottom wall portion 42 b forms a partition that partitions the main housing 41 and the compression mechanism housing 42. The bottom wall portion 42b is provided with a through hole through which the other end portion of the rotating shaft 2a of the electric motor 1 is inserted in the central portion in the radial direction, and a bearing 45 that supports the other end side of the rotating shaft 2a. A fitting portion to be fitted is formed.

  Although not shown, the housing 40 is formed with a suction port and a discharge port for the refrigerant. For example, the refrigerant sucked from the suction port flows through the main housing 41 and then the compression mechanism housing 42. Inhaled. Thereby, the electric motor 1 is cooled by the suction refrigerant. The refrigerant compressed by the compression mechanism 20 is discharged from the discharge port.

  The electric motor 1 includes a rotor 2, a stator core 3 that is disposed radially outside the rotor 2, a bobbin 4 that is disposed at an end of the stator core 3 and has electrical insulation, and is wound around the bobbin 4 and the stator core 3. For example, a three-phase AC motor is applied. For example, a direct current from a vehicle battery (not shown) is converted into an alternating current by an inverter 10 and is supplied to the electric motor 1 via an energization terminal 11 of the inverter 10 and a connection terminal 32 in the connector housing 30 as will be described later. Has been. A stator unit of the electric motor 1 is configured including the stator core 3, the bobbin 4, and the coil 5. First, the stator unit will be described in detail below.

2 is a perspective view showing a state where the stator unit of the electric motor 1 is assembled, FIG. 3 is an exploded perspective view of the stator unit, and FIG. 4 is an enlarged view of a portion A shown in FIG.
As shown in FIG. 3, the stator core 3 includes a back yoke 3 a and a plurality of teeth 3 b that protrude radially inward of the back yoke 3 a, and is configured by stacking, for example, silicon steel plates. . The teeth 3b are formed at a predetermined distance from each other in the circumferential direction of the back yoke 3a. A slot portion 3c is formed between the teeth 3b. An insulating film 6 having an appropriate shape (for example, a substantially C-shaped cross section) is inserted into each slot portion 3c in accordance with the shape of the slot portion 3c. Thereby, electrical insulation between the coil 5 and the stator core 3 is maintained. In addition, an insulating film 7 that is formed in an appropriate shape in accordance with the length of the insulating film 6 in the longitudinal direction is also inserted into each slot 3c. As a result, the electrical insulation between the coils 5 wound around the adjacent teeth 3b is maintained.

  The bobbin 4 is disposed at an end portion of the stator core 3, and is disposed at each axial end of the stator core 3, for example. The bobbin 4 is made of, for example, a synthetic resin and has electrical insulation.

In the present embodiment, the bobbin 4 specifically includes an inverter-side bobbin 4a disposed on the inverter 10 side and a compression mechanism-side bobbin 4b disposed on the compression mechanism 20 side.
The inverter-side bobbin 4a has a cylindrical portion 4a1 and a plurality of protruding portions 4a2 protruding inwardly in the radial direction of the cylindrical portion 4a1. The cylindrical portion 4 a 1 is formed so that its outer diameter is smaller than the outer diameter of the back yoke 3 a of the stator core 3. The projecting portion 4a2 is projectingly provided at a position corresponding to the tooth 3b of the stator core 3, and the projecting end portion is bent toward the outside in the axial direction (inverter side). By bending in this way, the coil is prevented from falling off when the coil 5 is wound.

The compression mechanism-side bobbin 4b has a cylindrical portion 4b1 and a plurality of protruding portions 4b2 protruding inward in the radial direction of the cylindrical portion 4b1. The cylindrical portion 4b1 is formed so that its outer diameter is smaller than the outer diameter of the back yoke 3a of the stator core 3. The protruding portion 4b2 protrudes at a position corresponding to the tooth 3b of the stator core 3, and its protruding end is axially outward (on the side opposite to the inverter 10), that is, the protruding end of the protruding portion 4a2 of the inverter-side bobbin 4a. Bending is formed in the direction opposite to the portion. In this way, by bending the protruding end portions of the protruding portions 4a2 and 4b2 of the pair of bobbins 4a and 4b in directions opposite to each other, the coil 5 can be reliably wound without loosening.
Here, the inverter-side bobbin 4a is disposed on one end side in the axial direction of the stator core 3 so that the protruding portion 4a2 overlaps the teeth 3b of the stator core 3. On the other hand, the compression mechanism side bobbin 4b is disposed at the other axial end of the stator core 3 such that the protruding portion 4b2 overlaps the teeth 3b of the stator core 3. That is, both end surfaces of the teeth 3b in the axial direction are covered with the projecting portions 4a2 and 4b2, and the side surfaces of the teeth 3b on the slot 3c side are covered with the insulating film 6. As described above, the teeth 3b are covered with the insulating members (4a2, 4b2, 6) on the outer peripheral surface except for the projecting end face. In this state, the coil 5 is wound around each tooth 3b. The insulating film 7 is inserted between the coils 5 wound around the adjacent teeth 3b. In this way, the coil 5 is wound around the bobbin 4 and the stator core 3.

Moreover, in this embodiment, the bobbin 4 (inverter side bobbin 4a) includes the extending | stretching part 4a3 extended toward the inverter 10 in an inverter side edge part (namely, inverter side edge part of the cylindrical part 4a1), for example. The extending portion 4a3 has a through hole 4a4 (see FIG. 3) that penetrates in the bobbin radial direction. As shown in FIG. 4, the extending portion 4a3 is fitted into a fitting hole 31e described later of the connector housing 30, and the protruding portion 31f is engaged with the through hole 4a4 in the fitted state. Thereby, the connector housing 30 is engaged and attached to the bobbin 4 (4a). Further, the end 4a3 ′ (see FIG. 4) of the extending portion 4a3 is formed to be inclined.
In addition, although extended part 4a3 was demonstrated as what has through-hole 4a4, although not illustrated, it is good also as what has groove part 4a5 formed in the bobbin radial direction outer side. In this case, the protrusion 31f of the connector housing 30 engages with the groove 4a5.

  Returning to FIG. 1, the rotor 2 is inserted into the rotating shaft 2 a and supported rotatably on the radially inner side of the stator core 3. One end portion of the rotating shaft 2a is rotatably supported by a support portion 41b1 formed in the main housing 41. The other end of the rotating shaft 2 a is inserted through a through hole formed in the compression mechanism housing 42 and is rotatably supported by a bearing 45. The rotor 2 is made of a cylindrical permanent magnet or the like. The rotating shaft 2 a is fitted into a through hole formed at the center in the radial direction of the rotor 2 by shrink fitting or the like, and is integrated with the rotor 2. When a magnetic field is generated in the stator core 3 due to the power supply from the inverter 10, a rotational force acts on the rotor 2, thereby rotating the rotary shaft 2a. The other end of the rotating shaft 2a is connected to a movable scroll 22 (to be described later) of the compression mechanism 20 so as to be capable of being driven to turn.

The inverter 10 is for driving the electric motor 1.
In the present embodiment, the inverter 10 has an energization terminal 11, converts a direct current from a vehicle battery (not shown) into an alternating current, and the alternating current is output from the energization terminal 11. The inverter 10 is accommodated in the main housing 41 through an opening on one end side of the peripheral wall portion 41 a of the main housing 41 and is disposed on one end side of the rotating shaft 2 a of the rotor 2.

  The energization terminal 11 is a terminal for supplying power to the electric motor 1 and is electrically connected to the connection terminal 32 held in the connector housing 30. As will be described later, the connection terminal 32 is connected to the end of the coil 5 (lead wire 5a) in advance. Therefore, it is possible to supply power from the inverter 10 to the electric motor 1 by connecting the energization terminal 11 to the connection terminal 32.

In the present embodiment, the energizing terminal 11 is a male terminal extending from the inverter 10 toward the electric motor 1 as shown in FIGS. 1 and 5 to 7.
5 is a perspective image view for explaining the arrangement relationship between the energization terminals 11 and the connector housing 30 of the electric compressor of the above embodiment, FIG. 6 is an enlarged view of a portion B shown in FIG. 1, and FIG. FIG. 6 is a cross-sectional view of a main part illustrating the energization terminal and the connector housing illustrated in FIG. 6 in another cross section including the longitudinal direction of the connector housing. In FIG. 5, for convenience of explanation, the main housing 41 and the inverter cover 43 are not shown, and the positional relationship before connection between the energizing terminals 11 and the connector housing 30 is schematically shown.

  Specifically, a plurality of (three) energization terminals (hereinafter referred to as lead pins) 11 made of male terminals are provided as shown in FIG. Each lead pin 11 passes through a hermetic plate 12 to be described later and is arranged with a space therebetween.

  As shown in FIG. 5, each lead pin 11 is fitted with annular insulators 13 and 13 that are divided into one end surface side and the other end surface side of the hermetic plate 12. When the annular insulators 13, 13 sandwich the hermetic plate 12 between them and engage with the lead pin 11, the lead pin 11 is fixed to the hermetic plate 12.

The hermetic plate 12 is for supporting the lead pin 11, and as shown in FIGS. 6 and 7, is fixed to the partition wall portion 41b with bolts. A hermetic gasket 14 is interposed between the hermetic plate 12 and the partition wall 41b, and the space between them is sealed. One end of the lead pin 11 is connected to the female terminal 15 on the circuit side of the inverter 10. The other end side of the lead pin 11 is inserted into a through hole formed at an appropriate position of the partition wall portion 41 b corresponding to each opening portion 31 b described later of the connector housing 30, and protrudes from the electric motor 1 side. A connection terminal 32 in the connector housing 30 is connected. An annular sealing member 16 made of, for example, rubber and having electrical insulation is attached to the outer periphery of the insulator 13 on the connector housing side (electric motor side) of each lead pin 11. The lead pin 11 is inserted into the opening 31 b together with the insulator 13 and the sealing member 16. As a result, the sealing member 16 is interposed between the insulator 13 and the peripheral wall 31 d that forms the opening 31 b of the connector housing 30.
With such a structure, the energizing terminal 11 penetrates the partition wall 41b in a gas-liquid tight manner.

The compression mechanism 20 is driven by the electric motor 1 and compresses the refrigerant. The compression mechanism 20 is accommodated in the compression mechanism housing 42 and disposed on the other end side of the rotary shaft 2 a of the rotor 2.
In the present embodiment, the compression mechanism 20 is a scroll compressor, and includes a fixed scroll 21 and a movable scroll 22. The movable scroll 22 is driven to rotate with respect to the fixed scroll 21 to compress the refrigerant.
The fixed scroll 21 is fixed by contacting an outer peripheral portion to a stepped portion formed by cutting out an end portion of the cylindrical portion 42 a of the compression mechanism housing 42.
The movable scroll 22 is disposed between the fixed scroll 21 and the bottom wall portion 42b, and is connected to the other end of the rotary shaft 2a so as to be turned by the rotation of the rotary shaft 2a.

Next, FIG. 8 is a plan view of the connector housing 30 and shows a state before the connection terminal 32 is mounted, and FIG. 9 is a side view of the connector housing 30 as seen from the direction of arrow C shown in FIG.
The connector housing 30 includes a connector housing body 31 and connection terminals 32 as shown in FIGS. 8 and 9, and holds the connection terminals 32 in the connector housing body 31 as shown in FIGS. 6 and 7. Do it. As shown in FIG. 2, the connector housing 30 is provided on the bobbin 4 so as to be located inside the outer peripheral surface of the stator core 3. Specifically, the connector housing 30 is provided at the inverter side end of the inverter side bobbin 4a (cylindrical portion 4a1).
In the present embodiment, the connector housing 30 is configured to be detachable from the bobbin 4 (4a). This detachable structure will be described later.

  As shown in FIG. 7, the connector housing body 31 forms a receiving portion 31 a that holds and holds the connection terminal 32 therein, and communicates with the connection terminal 32 on the inverter side end surface of the connector housing body 31. Opening 31b is formed. For example, a through hole 31c (see FIGS. 6 and 7) is formed in the inverter side end surface of the connector housing body 31, and a cylindrical peripheral wall 31d is projected from the periphery of the through hole 31c on the inverter side end surface of the connector housing body 31. ing. Thereby, an opening 31b communicating with the connection terminal 32 through the inner side of the peripheral wall 31d and the through hole 31c is formed.

  In the present embodiment, as shown in FIGS. 6 and 7, the opening 31b includes a reduced diameter portion 31b1 that decreases in diameter toward the connection terminal 32 side. The reduced diameter portion 31b1 is configured, for example, by forming the inner peripheral surface of the base portion of the peripheral wall 31d in a conical shape.

In the present embodiment, the connector housing main body 31 is formed in a so-called cluster housing type housing shape having a plurality of receiving portions 31a (see FIG. 7) and a plurality of openings 31b so as to be able to receive a plurality of connection terminals 32. Has been. Three connection terminals 32, accommodating portions 31 a, and openings 31 b are provided corresponding to the number of lead pins 11.
As shown in FIGS. 2 and 5, each of the openings 31 b and the connection terminals 32 are connected to the inverter-side bobbins 4 a (cylindrical portions 4 a 1) corresponding to the lead pins 11 when the connector housing body 31 is attached to the bobbin 4. ) Are arranged along the circumferential direction.
More specifically, as shown in FIGS. 7 to 9, the cluster housing type connector housing body 31 has a through-hole 31c formed in the inverter side end surface of a cylindrical body having a rectangular cross section forming the accommodating portion 31a. Three L-shaped cylindrical bodies each having the peripheral wall 31d projecting from the peripheral edge of the through hole 31c are arranged side by side and are integrally formed. As shown in FIGS. 2 and 5, the three L-shaped cylinders are integrated with each other in the longitudinal direction so that each opening 31b is along the end of the cylindrical portion 4a1 of the inverter-side bobbin 4a. Is formed.

The connection terminal 32 is for electrically connecting the lead pin 11 of the inverter 10 and the coil 5.
In the present embodiment, as shown in FIG. 7, the connection terminal 32 is connected to the end portion (lead wire 5 a) of the coil 5 and is a female terminal into which the lead pin (male terminal) 11 can be inserted. is there.

Specifically, the lead wire 5a drawn out from the coil 5 wound around the bobbin 4 is covered, leaving the tip portion 5a1 as shown in FIGS. 7 to 9, and the exposed tip portion 5a1. Is crimped to one end of the connection terminal 32. An annular sealing member 33 made of, for example, rubber and having electrical insulation is attached to the outer periphery of the end of the lead wire 5a covered. The connection terminal 32 is inserted and held in the housing portion 31 a together with the lead wire 5 a and the sealing member 33. Thereby, as shown in FIG. 7, the sealing member 33 is interposed between the connector housing main body 31 and the lead wire 5a.
With such a structure, the end portion (lead wire 5a) of the coil 5 is inserted into the connector housing 30 in a gas-liquid tight manner.

Here, if the connector housing 30 is attached and fixed to the end of the bobbin 4 on the inverter side, it may become an obstacle when the coil 5 is wound. In the present embodiment, assuming such a case, the connector housing 30 is detachably provided on the bobbin 4 (4a).
Specifically, as shown in FIG. 4, the connector housing 30 engages with a fitting hole 31e that fits into the extending portion 4a3 formed in the inverter-side bobbin 4a and a through-hole 4a4 in the inverter-side bobbin 4a. And a protrusion 31f.

More specifically, as shown in FIG. 8 and FIG. 9, they protrude from the outer surface of the L-shaped cylinder on the proximal end side of the connector housing body 31 and are spaced apart from each other in the longitudinal direction of the L-shaped cylinder. Installation portions 31g and 31g are formed. The ends of the projecting portions 31g and 31g are U-shaped (see FIG. 9) extending downward in parallel with the outer surface and spaced from the outer surface by a distance corresponding to the thickness of the extending portion 4a3. It is joined to the end of the connecting plate 31h. From the bottom of the U-shaped groove of the connecting plate 31h, the engaging plate 31i is erected upward in parallel with the outer surface.
The fitting hole 31e is formed by the outer surface of the connector housing body 31, the projecting portions 31g and 31g, and the connecting plate 31h, and the protruding portion 31f faces the outer surface at the end of the engaging plate 31i. Is projected.

Hereinafter, the attaching / detaching operation of the connector housing 30 to the inverter-side bobbin 4a will be briefly described with reference to FIGS.
When the connector housing 30 is slid to the inverter side bobbin 4a side with the lower back surfaces of the connecting plate 31h and the engagement plate 31i being in contact with the outer surface of the extending portion 4a3, the extending portion 4a3 is fitted into the fitting hole of the connector housing 30. The protrusion 31f of the engagement plate 31i comes into contact with the inclined portion 4a3 ′ at the end of the extending portion 4a3. When the connector housing 30 is further slid in this state, the engaging plate 31i is elastically deformed and slid on the extending portion 4a3, and when the protruding portion 31f is engaged with the through hole 4a4, FIG. 2 and FIG. As described above, the mounting of the connector housing 30 on the inverter-side bobbin 4a is completed. To remove the connector housing 30, for example, the connector housing 30 is slid in the disengagement direction (upward in FIG. 4) while pinching the end of the engagement plate 31i and elastically deforming outward. It becomes possible by releasing the engagement with the hole 4a4. Thus, the connector housing 30 is configured to be detachable from the inverter side end of the inverter side bobbin 4a.

According to the electric compressor 100 according to this embodiment, the bobbin 4 having electrical insulation is arranged at the end of the stator core 3 arranged on the outer side in the radial direction of the rotor 2, and the coil of the inverter 10 and the electric motor 1 is used. Since the connector housing 30 having the connection terminals 32 that are electrically connected to each other is provided on the bobbin 4 so as to be located on the inner side of the outer peripheral surface of the stator core 3, the connector housing 30 is connected to the outer periphery of the stator core 3. Since it can be provided so as not to protrude from the surface, an increase in the outer dimensions of the waistline is not caused.
And since the connector housing 30 is provided in the bobbin 4 arrange | positioned at the edge part of the stator core 3, it is not necessary to process the stator core 3 for connector housing attachment, and the magnetic permeability of the stator core resulting from connector housing attachment falls In addition, conduction between the inverter and the electric motor can be performed while preventing the occurrence of the imbalance.
In this way, it is possible to provide an electric compressor capable of conducting between the inverter and the motor without causing a decrease in motor efficiency and an increase in the outer circumference of the waistline.

  Further, since the connector housing 30 can be fixed by being attached to the bobbin 4, for example, when the electric motor 1 is assembled into the main housing 41, the connector housing 30 is fixed to the bobbin (4a). In this state, the electric motor 1 can be inserted into the main housing 41 and the lead pins 11 can be easily connected to the connection terminals 32 in the connector housing 30. That is, for example, when the electric motor 1 is assembled, the angular position of the electric motor 1 is adjusted so that the lead pin 11 protruding from the partition wall 41b of the main housing 41 and the opening 31b of the connector housing 30 are aligned. The electric motor 1 is inserted in a state that is roughly aligned in advance. Thereby, the lead pin 11 and the connection terminal 32 in the connector housing 30 can be easily connected.

  In the present embodiment, the connector housing 30 is configured to be detachable from the bobbin 4 (4a). Therefore, for example, the coil housing 5 can be wound by removing the connector housing 30 from the bobbin (4a). Thus, by configuring the connector housing 30 to be detachable, not only the connection operation between the connection terminal 32 and the lead pin 11 but also the winding operation of the coil 5 can be easily performed.

  In the present embodiment, the bobbin 4 (4a) is an extending portion 4a3 extending toward the inverter 10, and is a through-hole 4a4 penetrating in the bobbin radial direction or a groove 4a5 (not shown) formed outside the bobbin radial direction. Including a stretched portion 4a3. And the connector housing 30 is the structure which has the fitting hole 31e fitted with the extending | stretching part 4a3, and the projection part 31f engaged with the through-hole 4a4 or the groove part 4a5. Thereby, the mounting of the connector housing 30 on the inverter-side bobbin 4a can be easily performed with one touch only by the mounting operation in the extending direction of the extending portion 4a3, that is, the axial center direction of the rotating shaft 2a.

  In this embodiment, the connector housing 30 includes an opening 31b communicating with the connection terminal 32 on the inverter side end face, and the opening 31b includes a reduced diameter portion 31b1 that decreases in diameter toward the connection terminal 32. Is done. Thus, for example, when the electric motor 1 is incorporated in the main housing 41, the reduced diameter portion 31b1 serves as a guide and the lead pin 11 and the connection terminal without accurately matching the angular position of the electric motor 1 with respect to the lead pin 11. 32 can be easily connected.

  In the present embodiment, a plurality (three) of lead pins 11, connection terminals 32, and openings 31b are provided, and the connector housing body 31 is attached to the bobbin 4 for each of the openings 31b and each of the connection terminals 32. In some cases, the bobbin 4 (4a) is formed so as to be arranged along the circumferential direction corresponding to each lead pin 11. As a result, the connector housing 30 can be disposed close to the cylindrical portion 4a1 side of the inverter-side bobbin 4a. For example, a structure that supports one end of the rotating shaft 2a of the rotor 2 (the rotation formed in the partition wall portion 41b). It is easy to secure a space for forming the support portion 41b1) of the shaft 2a. That is, it is convenient when there is no room on the rotating shaft 2a side or when the space is used for other purposes, and the degree of freedom in layout is increased, so that the space can be used effectively.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not restrict | limited to the said embodiment, A various deformation | transformation and change are possible based on the technical idea of this invention.

  For example, in the present embodiment, the connector housing 30 has been described as being removable, but it may not be removable if the coil 5 can be wound. Further, although the connector housing 30 has been described as being formed in a so-called cluster housing type shape, it may be formed separately for each connection terminal 32. In this case, each connector housing 30 is individually attached to the inverter side bobbin 4a.

  Further, in the present embodiment, the bobbin 4 has an inverter side bobbin 4a and a compression mechanism side bobbin 4b, and the inverter side bobbin 4a has a stator core 3 such that its protruding portion 4a2 overlaps the teeth 3b of the stator core 3. The compression mechanism-side bobbin 4b is described as being disposed at the other axial end of the stator core 3 so that the protruding portion 4b2 overlaps the teeth 3b of the stator core 3. The configuration of 4 is not limited to this, and any configuration that is disposed at the end of the stator core 3 may be used.

  Moreover, although the case where the three-phase alternating current motor was used as the electric motor 1 was demonstrated, not only this but a single phase alternating current motor may be sufficient, In this case, the lead pin 11, the connection terminal 32, and the opening part 31b are Two pieces may be provided. The energization terminal (lead pin) 11 is a male terminal and the connection terminal 32 is a female terminal. However, the energization terminal 11 may be a female terminal and the connection terminal 32 may be a male terminal.

  Moreover, although the case where the scroll type compressor was used as the compression mechanism 20 of the electric compressor 100 was demonstrated, it is not restricted to this, An appropriate type electric compressor, such as a swash plate type compressor, can be used.

DESCRIPTION OF SYMBOLS 1 ... Electric motor 2 ... Rotor 2a ... Rotary shaft 3 ... Stator core 4 ... Bobbin 4a3 ... Extension part 4a4 ... Through-hole 4a5- .... Groove part 5 ... Coil 10 ... Inverter 11 ... Energizing terminal (lead pin)
20... Compression mechanism 30... Connector housing 31 b... Opening 31 b 1 .. Reduced diameter portion 31 e... Fitting hole 31 f. Electric compressor

Claims (7)

An electric compressor comprising an electric motor, an inverter for driving the electric motor, and a compression mechanism that is driven by the electric motor and compresses the refrigerant,
The electric motor is
A rotor,
A stator core disposed radially outside the rotor;
A bobbin disposed at an end of the stator core and having electrical insulation;
A coil wound around the bobbin and the stator core;
A connector housing having a connection terminal for electrically connecting the inverter and the coil, the connector housing being provided on the bobbin so as to be located on the inner side of the outer peripheral surface of the stator core;
Including an electric compressor.   The electric compressor according to claim 1, wherein the connector housing is detachable from the bobbin. The bobbin is an extending part that extends toward the inverter, and includes a extending part that has a through hole penetrating in the bobbin radial direction or a groove part formed on the outer side in the bobbin radial direction,
3. The electric compressor according to claim 2, wherein the connector housing includes a fitting hole that engages with the extending portion, and a protrusion that engages with the through-hole or the groove portion. The inverter has a current-carrying terminal consisting of a male terminal,
The connector housing has an opening communicating with the connection terminal on the inverter side end surface of the connector housing;
The electric compressor according to any one of claims 1 to 3, wherein the connection terminal is a female terminal that is connected in advance to the end of the coil and into which the energization terminal can be inserted.   The electric compressor according to claim 4, wherein the opening includes a reduced diameter portion that decreases in diameter toward the connection terminal. A plurality of the energization terminals, the connection terminals and the openings are provided,
6. The electric compressor according to claim 4, wherein each of the openings and each of the connection terminals is disposed along a circumferential direction of the bobbin corresponding to each of the energization terminals.   The electric compressor according to any one of claims 1 to 6, wherein the compression mechanism is a scroll compressor.