JP6777239B2 - Stator, electric motor and sealed compressor - Google Patents

Description

The present invention relates to an electric motor used in a closed compressor or the like, and particularly relates to an improvement of a wire connection processing structure of a stator.

The stator of an electric motor used in a conventional sealed compressor or the like is wound around a stator core having a plurality of magnetic pole teeth along the inner peripheral portion and each magnetic pole tooth of the stator core via an insulating member. It is composed of windings. A restraining portion for restraining the terminal portion of the winding is provided on the end face of the stator core. The restraint portion is provided with a restraint groove, and restrains the winding start terminal portion or the winding end terminal portion of the winding. Further, in the restraint groove, the winding start terminal portions of the winding are connected to each other, and the crossover wire connecting the power supply side lead wire and the winding end terminal portion of the winding are connected to form a neutral point. The crossover is also restrained. The end portion and the crossover of the restrained winding are connected by a metal piece fitted in the restraint portion. (See, for example, Patent Document 1).

JP 2015-070652

In order to improve the performance of the stator of an electric motor, the ratio of the back yoke connecting the magnetic pole teeth to the magnetic pole teeth should be small. Therefore, on the stator end face, the space other than the magnetic pole teeth around which the winding is wound is limited, and the restraint portion is provided in that space. On the other hand, in the method of connecting the stator, the terminal portion of the winding and the terminal portion of the crossover are constrained in the restraint groove, and then the unnecessary portion is cut. For the convenience of cutting work in the restraint portion provided in a narrow space, the terminal portion of the winding and the terminal portion of the crossover are oriented in the radial direction of the stator and in the outer peripheral direction with respect to the center. Have been placed. Therefore, the cut surfaces of the winding and the crossover are exposed and arranged in the radial direction of the stator and in the outer peripheral direction with respect to the center.
Since the closed compressor handles high-pressure and high-temperature gas generated by the compression operation, all the mechanisms are housed in a metal closed container. Similarly, the electric mechanism portion is housed in the closed container by fitting the outer peripheral surface of the stator to the inner peripheral surface of the closed container. Therefore, the restraint portion and the closed container are arranged close to each other. Since the electric mechanism unit is small in size but obtains high torque, the rated voltage is also high and a high voltage is applied. As a result, there has been a problem in ensuring an insulation distance between the cut surface of the end portion of the winding and the cut surface of the end portion of the crossover and the inner peripheral surface of the closed container in a narrow space.

The present invention has been made to solve the above-mentioned problems, and is a closed container for fixing the cut surface of the end portion of the winding and the stator while maintaining workability in the conventional stator connection process. It provides a high-efficiency and low-cost stator, an electric motor, and a closed compressor that can secure an insulation distance from the inner peripheral surface.

The stator, electric motor, and sealed compressor according to the present invention have a stator core having magnetic pole teeth, a winding wound around an insulating member attached to the magnetic pole teeth, and a stator core of the insulating member . A first restraint portion provided on the end face in the axial direction to restrain the winding start terminal portion of the winding, and an axial end face of the stator core of the insulating member are provided to restrain the winding end terminal portion of the winding. A second restraint portion is provided, and the first restraint portion is provided with a stator core from the second restraint portion so that a gap is formed between the first restraint portion and the end face of the stator core. The end end of the winding is restrained by the second restraint, then passes through the gap, and is restrained by the restraint of the insulating member of the adjacent magnetic pole teeth. , The first restraint part and the second restraint part are wound so that the cut surface of the winding start terminal part and the cut surface of the winding end end part of the winding face the inside of the stator core. It is a restraint.

The stator, electric motor and sealed compressor according to the present invention have a stator core having magnetic pole teeth, a winding wound around an insulating member attached to the magnetic pole teeth, and a stator core of the insulating member . A first restraint portion provided on the end face in the axial direction to restrain the winding start terminal portion of the winding, and an axial end face of the stator core of the insulating member are provided to restrain the winding end terminal portion of the winding. A second restraint portion is provided, and the first restraint portion is provided with a stator core from the second restraint portion so that a gap is formed between the first restraint portion and the end face of the stator core. The winding end end portion of the winding is constrained by the second restraint portion, then passes through the gap, and is restrained by the restraint portion of the insulating member of the adjacent magnetic pole tooth. , The first restraint part and the second restraint part are wound so that the cut surface of the winding start terminal part and the cut surface of the winding end end part of the winding face the inside of the stator core. Since it is restrained, the insulation distance between the cut surface of the winding and the inner peripheral surface of the closed container is secured, and the workability in the conventional stator connection processing is maintained, and the stator is highly efficient and inexpensive. Electric motors and sealed compressors can be obtained.

It is explanatory drawing of the whole of the closed type compressor in Embodiment 1 of this invention. It is sectional drawing of the electric mechanism part of the closed type compressor in Embodiment 1 of this invention. It is the schematic explanatory drawing of the stator core of the electric mechanism part in Embodiment 1 of this invention. It is explanatory drawing of the stator of the electric mechanism part in Embodiment 1 of this invention. It is a wiring diagram of the winding of the electric mechanism part in Embodiment 1 of this invention. It is a circuit diagram of the winding of the electric mechanism part in Embodiment 1 of this invention. It is a structural drawing of the insulating member of the electric mechanism part in Embodiment 1 of this invention. It is a figure explaining the connection method by the insulating member of the electric mechanism part in Embodiment 1 of this invention. It is a figure explaining the connection method of the winding of the electric mechanism part in Embodiment 1 of this invention. It is another figure explaining the connection method by the insulating member of the electric mechanism part in Embodiment 1 of this invention. It is another figure explaining the connection method of the crossover of the electric mechanism part in Embodiment 1 of this invention.

Embodiment 1.
FIG. 1 is a cross-sectional view showing a closed rotary compressor according to the first embodiment for carrying out the present invention, as viewed from the vertical direction, that is, the radial direction of the crankshaft.

The configuration of the compression mechanism and its surroundings will be described.
As shown in FIG. 1, the sealed compressor 100 is provided with a compression mechanism unit 2 and an electric mechanism unit 3. The compression mechanism unit 2 and the electric mechanism unit 3 are housed in a closed container 1 that surrounds the outer periphery thereof. The compression mechanism portion 2 and the electric mechanism portion 3 are fixed to the inner peripheral surface of the closed container 1. The closed container 1 is a metal container that is required to have airtightness, heat resistance, and strength because its inside is filled with compressed refrigerant gas. The closed container 1 is composed of an upper container 11 and a lower container 12. The electric mechanism unit 2 and the compression mechanism unit 3 are connected by a crankshaft 4, and the compression mechanism unit 2 is driven by the electric mechanism unit 3.

The crankshaft 4 is composed of a main shaft portion 41, a sub shaft portion 42, and an eccentric shaft portion 43, and is provided in the axial direction in the order of the main shaft portion 41, the eccentric shaft portion 43, and the sub shaft portion 42. That is, a main shaft portion 41 is provided on one side of the eccentric shaft portion 43 in the axial direction, and a sub shaft portion 42 is provided on the other side of the eccentric shaft portion 43 in the axial direction. The main shaft portion 41, the sub-shaft portion 42, and the eccentric shaft portion 43 each have a substantially cylindrical shape, and are provided so that the centers of the axes of the main shaft portion 41 and the sub-shaft portion 42 coincide with each other, that is, coaxially. Has been done. On the other hand, the center of the shaft of the eccentric shaft portion 43 is provided so as to be offset from the center of the shafts of the main shaft portion 41 and the sub shaft portion 42. When the main shaft portion 41 and the sub shaft portion 42 rotate about the center of the shaft, the eccentric shaft portion 43 rotates eccentrically. A cylindrically shaped rolling piston 21 is slidably mounted on the eccentric shaft portion 43.

The compression mechanism portion 2 is composed of a cylinder 22, a main bearing 23, an auxiliary bearing 24, and the like.
The cylinder 22 is provided with an internal space that is substantially cylindrical and has both ends open in the axial direction. The openings at both ends of the internal space in the axial direction are closed by the main bearing 23 and the auxiliary bearing 24, respectively. An eccentric shaft portion 43 of the crankshaft 4 and a rolling piston 21 are housed in the internal space of the cylinder 22. The cylinder 22 is provided with a groove in the radial direction of its internal space, and is provided with a vane (not shown) that reciprocates in the groove in the radial direction. One end of the vane is in contact with the outer peripheral surface of the rolling piston 21, and the space formed by the outer peripheral surface on the outer diameter side of the rolling piston 21 and the inner peripheral surface of the internal space of the cylinder 22 is divided into two. .. That is, a compression chamber for compressing the refrigerant gas is formed.

Adjacent to the closed container 1, a suction muffler 101 having a role of muting the refrigerant sound is provided. The suction muffler 101 is connected to the cylinder 22 by a suction connecting pipe 5. One end of the suction connecting pipe 5 is opened in the suction muffler 101, and the other end is connected to a suction port opened in the compression chamber formed in the cylinder 22. The refrigerant gas sucked from the suction muffler 101 and the suction connecting pipe 5 is sucked into the compression chamber formed in the cylinder 22 through the suction port.

The main bearing 23 is provided with a bearing hole through which the main shaft portion 41 of the crankshaft 4 is inserted. The main bearing 23 rotatably supports the crankshaft 4 by supporting the main shaft portion 41 inserted into the bearing hole.
Similarly, the auxiliary bearing 24 is provided with a bearing hole through which the auxiliary shaft portion 42 of the crankshaft 4 is inserted. The auxiliary bearing 24 rotatably supports the crankshaft 4 by supporting the auxiliary shaft portion 42 inserted through the bearing hole.

A discharge muffler 25 is attached to the main bearing 23 for the purpose of silencing the refrigerant noise. A muffler chamber, which is a first discharge space, is formed between the main bearing 23 and the discharge muffler 25. The main bearing 23 is provided with a discharge port (not shown) and communicates with a compression chamber formed in the cylinder 22. The refrigerant gas compressed in the compression chamber is discharged into the muffler chamber of the discharge muffler 25 through this discharge port. This discharge port is usually closed by a discharge valve (not shown). When the refrigerant gas in the compression chamber reaches a predetermined pressure, the discharge valve opens the discharge port.
An opening 25a is provided in the upper part of the discharge muffler 25, and the refrigerant gas in the muffler chamber is discharged into the closed container 1 through the opening 25a.

A discharge pipe 6 is attached to the upper part of the closed container 1, that is, the upper container 11. The refrigerant gas released into the closed container 1 is discharged to the outside of the closed container 1 via the discharge pipe 6.

The operation of the compression mechanism unit 2 will be briefly described.
First, the refrigerant gas is sucked into the compression chamber formed in the cylinder 22 through the suction muffler 101, the suction connecting pipe 5, and the suction port. In the compression chamber, the rolling piston 21, that is, the eccentric shaft portion 43, moves in the internal space of the cylinder 22 due to the eccentric rotation of the eccentric shaft portion 43, and the communication with the suction port is cut off. Further, as the rolling piston 21 rotates eccentrically, the volume of the compression chamber is reduced, and the sucked refrigerant gas is compressed. As the eccentric rotation of the rolling piston 21 progresses, the compression chamber communicates with the discharge port. When the compression chamber and the discharge port communicate with each other and the refrigerant gas reaches a predetermined pressure, the discharge valve that closes the discharge port opens. When the discharge port is opened, the refrigerant gas in the compression chamber is discharged into the muffler chamber of the discharge muffler 25 through the discharge port. As the rolling piston 21 rotates eccentrically, the communication with the discharge port is cut off, and the communication with the suction port is established again. By repeating this, the compression mechanism unit 2 sucks, compresses, and discharges the refrigerant gas. A series of operations is performed while the rolling piston 21 makes one revolution in the internal space of the cylinder 22.

A refrigerating circuit composed of a heat exchanger, an expansion valve, and the like is provided outside the closed compressor 100, and the refrigerant gas discharged from the closed compressor 100 circulates in the refrigerating circuit and again. , It is connected so as to return to the closed compressor 100. That is, in the compression mechanism unit 2, the compressed refrigerant gas is discharged from the discharge pipe 6 to the outside of the closed container 1, circulates in the refrigeration circuit, and passes through the suction muffler 101 and the suction connecting pipe 5 to the compression mechanism. It is inhaled into part 2. It is configured like this.

The configuration and operation of the compression mechanism unit 2 have been described by taking the rotary type compressor shown in FIG. 1 as an example, but the electric motor of the electric mechanism unit 3 in the present application is not limited to the rotary type compressor. , Scroll type, Reciprocating type, any mechanism may be used. The rolling piston and the vane are separate bodies, and the configuration in which they are brought into contact with each other has been described, but this may be an integrated type. Further, the arrangement of the compression mechanism unit 2 and the electric mechanism unit 3 does not necessarily have to be such that the electric mechanism unit 3 is arranged above the compression mechanism unit 2. That is, it may be upside down, or may be arranged sideways and arranged side by side. These configurations of the compression mechanism unit 2 are examples, and the features of the present application are not limited to these configurations.

The rolling piston 21 and the crankshaft 4 are rotated by the electric mechanism unit 3.
The configuration of the electric mechanism unit 3 will be described. FIG. 2 is a cross-sectional view of the sealed compressor 100 cut at the portion of the electric mechanism portion 3 in a plane perpendicular to the crankshaft 4. The configuration of the electric mechanism unit 3 will be described with reference to FIGS. 1 and 2.
The electric mechanism unit 3 is composed of a rotor 31 and a stator 32 provided so as to surround the outside of the rotor 31.
The rotor 31 is provided with a shaft hole 31b penetrating in the axial direction on the central axis of the rotor 31. The spindle portion 41 of the crankshaft 4 is inserted into the shaft hole 31b of the rotor 31, and the rotor 31 is fixed to the spindle portion 41.
The stator 32 is inserted into the closed container 1 forming the outer periphery of the closed compressor 100, and is fixed to the inner peripheral surface of the closed container 1 by shrink fitting or the like. That is, the outer peripheral surface of the stator 32 in the radial direction and the inner peripheral surface of the closed container 1 are in contact with each other and fixed.

As shown in FIG. 2, the rotor 31 has a cylindrical shape and is fixed to the spindle portion 41 of the crankshaft 4. The rotor 31 is composed of a rotor core 31a in which thin plate-shaped electromagnetic steel plates are stacked in the axial direction of the crankshaft 4. The electromagnetic steel sheets constituting the rotor core 31a are punched out of the electromagnetic steel sheets into a certain shape, and a plurality of the electromagnetic steel sheets are stacked in the axial direction, and the stacked electromagnetic steel sheets are fixed by caulking or welding.

The rotor core 31a is provided with a magnet insertion hole 31c penetrating in the axial direction so as to surround the shaft hole 31b. A permanent magnet 33 formed of a flat plate-shaped rare earth element is inserted and fixed in the magnet insertion hole 31c. An even number of magnet insertion holes 31c and permanent magnets 33 are generally provided, and are provided at the outer edge portion in the radial direction of the rotor core 31a, that is, in the vicinity of the outer peripheral surface in the radial direction of the rotor core 31a.
The rotor 31 generates magnetic flux by the permanent magnet 33.

As shown in FIG. 1, an upper balance weight 34a is provided on the upper portion of the rotor core 31a, and a lower balance weight 34b is provided on the lower portion. The upper balance weight 34a and the lower balance weight 34b are provided in order to cancel the load when the eccentric shaft portion 43 of the crankshaft 4 rotates eccentrically. Further, the upper balance weight 34a and the lower balance weight 34b also prevent the permanent magnet 33 from scattering. The upper balance weight 34a, the lower balance weight 34b, and the rotor core 31a are fixed by the rivet 35. The rotor core 31a, the upper balance weight 34a, and the lower balance weight 34b are provided with rivet holes penetrating in the axial direction, and the rivet 35 is inserted and fixed in the rivet holes. If the load when the eccentric shaft portion 43 of the crankshaft 4 rotates eccentrically is small and there is no need to cancel it, an end plate may be attached instead of the upper balance weight 34a and the lower balance weight 34b. I do not care. The end plate prevents the permanent magnet 33 from scattering.

Further, the rotor core 31a is provided with a communication hole 36 that communicates in the axial direction. The communication hole 36 is for passing the refrigerant gas discharged from the compression mechanism unit 2. That is, the refrigerant gas discharged from the compression mechanism unit 2 passes through the communication hole 36 and is sent out to the discharge pipe 6.
In addition to the communication hole 36, the refrigerant discharged from the compression mechanism unit 2 passes through the gap between the rotor 31 and the stator 32, the gap between the stator 32, and the gap between the stator 32 and the closed container 1. The gas is sent out to the discharge pipe 6.

As shown in FIG. 2, the stator 32 has a cylindrical shape as a whole, and a rotor 31 is provided inside the stator 32. The stator 32 and the rotor 31 are installed with a gap of about 0.3 mm to 1.0 mm. The stator 32 is composed of a stator core 32a in which thin plate-shaped electromagnetic steel plates are stacked in the axial direction of the crankshaft 4.

The stator core 32a is composed of a back yoke 32b forming a cylindrical portion on the outer edge and a plurality of magnetic pole teeth, that is, teeth 32c provided inside the back yoke 32b. The teeth 32c extends toward the central axis of the stator core 32a, that is, the crankshaft 4. Its tip extends in an inverted arc shape so as to face the outer peripheral surface of the rotor. A slot 32d occupied by the stator winding 37 is formed between the teeth 32c and the teeth 32c.
In FIG. 2, each tooth 32c is separated and formed by the back yoke 32b, the stator winding 37 is wound around, and then the molded product is connected and fixed in an annular shape by the back yoke 32b. The child core 32a, that is, the stator 32 is formed. This is an example of a manufacturing method, and the features of the present application are not limited to this method.

A stator winding 37 is wound around the teeth 32c via an insulating member 38. The stator winding 37 is wound around the teeth 32c to form a magnetic pole.

The stator winding 37 is a conducting wire composed of a core wire as a conductor and at least one layer of a coating film covering the core wire. It is often a single wire, but multiple single wires may be used together. The material of the coating film is an insulating material, and is AI (amideimide) / EI (esterimide). The material of the core wire is copper, aluminum, or a conductive alloy. The stator 32 generates a magnetic flux for each tooth 32c by passing an electric current through the stator winding 37.
Since the coating has an insulating property, it does not conduct even if the conducting wires come into contact with each other.

The insulating member 38 insulates the stator core 32a mainly made of iron and the stator winding 37 made of copper. As the material of the insulating member 38, PET (polyethylene terephthalate), PBT (polybutylene terephthalate), LCP (liquid crystal polymer), PPS (polyphenylene sulfide) and the like are used.

The insulating member 38 is provided with a restraining portion for restraining and fixing the terminal portion which is the end of the stator winding 37. In the state where the insulating member 38 is attached to the stator core 32a, the restraint portion is arranged on the axial end surface of the back yoke 32b connected to the teeth 32c. The restraint portion is provided with a restraint groove. One of the terminal portions of the stator winding 37 wound around the teeth 32c is restrained in the restraint groove. The other end of the stator winding 37 is constrained to a restraint groove of a restraint portion different from the restraint portion in which one of the end portions of the stator winding 37 is restrained. In this way, the terminal portion of the stator winding 37 wound around the teeth 32c is locked to the restraint portion.
In addition to the stator winding 37, the crossover wire and the lead wire 39 are also restrained in the restraint groove of the restraint portion.

A pressure welding terminal is incorporated in the restraint portion. The pressure welding terminal is also provided with a groove, and the groove has a structure in which each wire is sandwiched. The pressure welding terminals are made of conductive metal. Then, the stator winding 37, the crossover wire, and the lead wire 39 are electrically connected. That is, the stator winding 37 is connected to the crossover wire and the lead wire 39 via the restraint portion and the pressure welding terminal incorporated in the restraint portion.

The crossover wire is a lead wire that connects the stator windings 37 wound around different teeth 32c. For example, a plurality of stator windings 37 may be connected in series or in parallel, or the terminal portions of the plurality of stator windings 37 may be connected to form a neutral point.

The lead wire 39 is a lead wire that supplies power to the stator winding 37 from the external power supply of the closed container 1, and is a lead wire that connects the connection terminal connected to the external power supply of the closed container 1 and the stator winding 37. Is. The material and composition of the lead wire may be the same as that of the stator winding 37, or may be a stranded wire. One end of the lead wire 39 is constrained by the restraining portion of the insulating member 38. A terminal 39a is attached to the other end, and the terminal 39a is connected to the connection terminal 7.
The connection terminal 7 is a terminal provided on the upper container 11 of the closed container 1 and electrically connects the inside and outside of the closed container 1. As a result, the stator winding 37 and the crossover wire constrained by the restraint portion of the insulating member 38 are connected to an external device via the lead wire 39, the terminal 39a, and the connection terminal 7, and are electrically conductive.
The connection terminal 7 may be provided in the lower container 12.

The connection terminal 7 is connected to a power source provided outside the sealed compressor 100, for example, an inverter device. From this power source, the electric mechanism unit 3 is energized and the electric mechanism unit 3 operates. That is, the stator 32 generates magnetic flux, and the rotor 31 rotates. Then, the compression mechanism unit 2 is driven via the crankshaft 4.

By the way, after fixing the stator winding 37 to the restraint groove of the restraint portion, the surplus portion is cut so as not to interfere with the operation of the electric mechanism portion 3. The workability of the cutting work and the cut pieces of the stator winding 37 are pulled out from the center of the stator 32 to the outer peripheral side in the radial direction so as not to remain on the stator 32, and the cutting is performed. Therefore, the restraint groove of the restraint portion is also provided in the outer peripheral direction in the radial direction from the center of the stator 32.

On the other hand, in the closed type compressor 100, the outer peripheral portion of the stator 32 in the radial direction is in contact with the inner peripheral surface of the metal closed container 1 and fixed. Therefore, since the cut cross section of the stator winding 37 also faces the inner peripheral surface of the closed container 1, it is necessary to secure an insulation distance. The insulation distance is a standard defined in, for example, IEC-J60950. In particular, in the electric mechanism 3 of the sealed compressor 100, a high voltage of 100 V to 200 V is applied, so it is important to secure an insulation distance.

However, the space on the axial end surface of the stator core 32a is narrow, and when trying to secure a sufficient insulation distance, the restraint portion may be moved from the inner peripheral surface of the closed container 1 to the teeth side of the stator 32. desirable. However, it impedes the space around which the stator winding 37 is wound. If the space of the stator winding 37 is obstructed, the stator winding 37 cannot be sufficiently wound. Therefore, the generated torque is reduced and the efficiency is also reduced. In order to arrange the restraint portion freely, the back yoke is secured regardless of the magnetic path and strength in which the stator 32 is generated.
Therefore, in the present application, the restraint method such as the stator winding 37 in the restraint portion is improved to secure the distance between the inner peripheral surface of the closed container 1 and the terminal portion of the stator winding 37 restrained by the restraint portion. The structure was used.
The specific configuration will be described with reference to FIGS. 3, 4, 5 and 6.

FIG. 3 is a plan view of the stator core 32a viewed from the axial direction of the crankshaft 4, and FIG. 4 shows a state when the stator winding 37 is wound around the stator core 32a. FIG. 5 is a schematic wiring diagram of the stator winding 37, and FIG. 6 is an arrangement of the connection states of the stator winding 37.

The stator core 32a in FIG. 3 is formed by connecting a plurality of core members 51a to 51i.
The iron core members 51a to 51i are formed by stacking thin plate-shaped electromagnetic steel plates in the axial direction of the crankshaft 4, and are perpendicular to and centered on the arcuate back yokes 52a to 52i and the back yokes 52a to 52i. It is composed of portions of teeth 53a to 53i extending in the direction. The back yokes 52a to 52i are connected at their respective ends and assembled in an annular shape. The back yokes 52a to 52i constitute the back yoke 32b of FIG. 2, and the teeth 53a to 53i are the same as the teeth 32c.

Windings 54a to 54i are wound around the teeth 53a to 53i, respectively, as shown in FIG.
Insulating members 55a to 55i are attached to the axial end faces of the stator core 32a, that is, the end faces of the iron core members 51a to 51i. The insulating members 55a to 55i are divided in the same manner as the iron core members 51a to 51i. Insulating members 55a to 55i are attached to the iron core members 51a to 51i, respectively. That is, the insulating member 55a is attached to the iron core member 51a, the insulating member 55b is attached to the iron core member 51b, and so on. Similar to the iron core members 51a to 51i, they are arranged in an annular shape to form the insulating member 38 of FIG. The insulating member 38 is attached to both end faces of the stator core 32a, but since the two are substantially the same, the description of the other insulating member 38 will be omitted.

Restraint portions 56a and 57a are provided on the axial end faces of the insulating member 55a. The restraint portions 56a and 57a constrain the terminal portion of the winding 54a, respectively. Similarly, for the insulating members 55b to 55i, restraint portions 56b to 56i and 57b to 57i are provided to restrain the terminal portions of the windings 54b to 54i.
In addition to the terminal portions of the windings 54a to 54i, the terminal portions of the crossover wires 58a to 58c and the terminal portions of the lead wires 60a to 60c are also restrained by the restraint portions 56a to 56i and 57a to 57i of the insulating members 55a to 55i. To.
Here, the terminal portion of the winding, the terminal portion of the crossover wire, and the terminal portion of the lead wire are the terminal portions of each lead wire, and the winding, the cross wire, and the lead wire formed by cutting from one lead wire. It is a portion of several cm to several tens of cm from the cut surface including the cut surface. Therefore, it exists at both ends of each lead wire. The terminal portion of the lead wire is a part used for connecting to another lead wire, and is a part for removing the coating and coating, and for connecting by a pressure welding terminal or by soldering.

The crossover wires 58a to 58c connect the windings 54a to 54i to each other, and the windings 54a to 54i are connected by the crossover wires 58a to 58c to form the stator winding 37 in FIG.
The crossover wires 58a to 58c are conductor wires composed of a core wire as a conductor and coatings 59a to 59f covering the core wire. Like the winding, the core wire is often a single wire, and the material is copper, aluminum, or a conductive alloy.
The coatings 59a to 59f are made of an insulating PCV (polyvinyl chloride) or the like. The coatings 59a to 59f are designed so that they are not conducted even if the crossovers 58a to 58c are in contact with each other or the crossovers 58a to 58c are in contact with the windings 54a to 54i.
The windings 54a to 54i, the crossover wires 58a to 58c, and the restraint portions 56a to 56i and 57a to 57i of the insulating members 55a to 55i are covered with the coverings 59a to 59f of the crossover wires 58a to 58c. The terminal portions at both ends and the intermediate portion between the terminal portion and the terminal portion will be described later.

The lead wires 60a to 60c are lead wires for connecting the stator winding 37 and the connection terminal 7, and one end thereof is constrained by the restraint portions 56a to 56i and 57a to 57i of the insulating members 55a to 55i. A terminal 39a is attached to the other end of the lead wires 60a to 60c to form the lead wire 39.

The insulating member 55a will be described with reference to FIG.
7A and 7B are an insulating member 55a, in which FIG. 7A is a front view seen from the back yoke 52a of the iron core member 51a, FIG. 7B is a side view seen from the right side of FIG. 7A, and FIG. It is a top view seen from above.

The insulating member 55a is composed of a portion of the back yoke portion 61 of the insulating member 55a arranged on the back yoke 52a of the iron core member 51a and a portion of the teeth portion 62 of the insulating member 55a arranged on the teeth 53a. .. A winding 54a is wound around the teeth portion 62 of the insulating member 55a.

A protrusion 63 is provided on the iron core member 51a side of the insulating member 55a. The iron core member 51a is provided with a hole in the axial direction, a protrusion 63 is fitted therein, and the insulating member 55a is fixed on the iron core member 51a. There is no limit to the number of protrusions 63, and one or more protrusions 63 are provided.

A first restraint portion 56a and a second restraint portion 57a are provided on the opposite side of the back yoke portion 61 of the insulating member 55a from the iron core member 51a.
The appearance of the restraint portions 56a and 57a is substantially a rectangular parallelepiped shape. A rectangular parallelepiped internal space is also provided inside, and the upper part of the internal space is open to the outside of the restraint portions 56a and 57a. That is, the restraint portions 56a and 57a are composed of four side surfaces and a bottom surface.

With the insulating member 55a attached to the iron core member 51a, restraint grooves 64a, 65a, 66a, 67a are provided on the circumferential side surface of the stator core 32a of the first restraint portion 56a. Similarly, restraint grooves 68a, 69a, 70a, 71a are also provided on the circumferential side surface of the stator core 32a of the second restraint portion 57a. The widths of the restraint grooves 64a to 71a are formed to be substantially the same as or slightly narrower than the diameter of the conducting wire constituting the stator winding 37. The restraint grooves 64a to 71a are connected to the openings of the restraint portions 56a and 57a, and the terminal portion of the winding 54a is inserted from the opening of the groove to be sandwiched and restrained.

The restraint grooves 64a and 65a are provided in parallel on one side surface of the first restraint portion 56a, and are provided so as to have the same depth. The restraint grooves 66a and 67a are provided in parallel on the other side surface of the first restraint portion 56a, and are provided so as to have the same depth. The restraint groove 66a is provided on the side surface of the restraint groove 64a so as to oppose each other. As a result, the lead wire is configured to be linearly passed from the restraint groove 64a to the restraint groove 66a. The restraint grooves 65a and 67a are also the same as the restraint grooves 64a and 66a, and are provided on the side surfaces that oppose each other so that the grooves oppose each other so that the lead wire can be passed linearly from the restraint groove 65a to the restraint groove 67a. ,It is configured.

The restraint grooves 68a to 71a are also the same as the restraint grooves 64a to 67a. The restraint grooves 68a and 69a are provided in parallel on one side surface of the second restraint portion 57a, and are provided so as to have the same depth. The restraint grooves 70a and 71a are provided in parallel on the other side surface of the second restraint portion 57a, and are provided so as to have the same depth. The restraint grooves 68a and 70a are provided on the side surfaces that oppose each other so that the grooves oppose each other, and are configured so that the lead wire can be linearly passed from the restraint groove 68a to the restraint groove 70a. The restraint grooves 69a and 71a are provided on the side surfaces that oppose each other so that the grooves oppose each other, and are configured so that the lead wire can be linearly passed from the restraint groove 69a to the restraint groove 71a.
An example in which two restraint grooves are provided on one side surface of the restraint portion so that the two conductors can be restrained has been described, but there is no limit to the number of restraint grooves provided, and the restraint grooves are provided on one side surface of the restraint portion. It is sufficient that one or more are provided.

Further, a restraint groove 72a is provided on the surface of the bottom of the first restraint portion 56a on the iron core member 51a side. The restraint grooves 64a to 67a and the restraint grooves 68a to 71a are formed with grooves toward the iron core member 51a, whereas the restraint grooves 72a are formed with grooves toward the opposite side of the iron core member 51a. There is. That is, it has an opening on the iron core member 51a side. The restraint groove 72a is provided so that the distance from the deepest portion of the restraint groove 72a to the end face of the iron core member 51a and the distance from the deepest portion of the restraint grooves 68a to 71a to the end face of the iron core member 51a are substantially the same. Has been done.

Along with this, the distance from the bottom surface of the first restraint portion 56a to the end face of the iron core member 51a is larger than the distance from the bottom surface of the second restraint portion 57a to the end face of the iron core member 51a. Similarly, the distance from the upper opening of the first restraint portion 56a to the end face of the iron core member 51a is larger than the distance from the upper opening of the second restraint portion 57a to the end face of the iron core member 51a. .. That is, the first restraint portion 56a is arranged at a position away from the end surface of the iron core member 51a with respect to the second restraint portion 57a. The side surface of the first restraint portion 56a and the side surface of the second restraint portion 57a are not completely opposed to each other, and a space is formed in the circumferential direction of the restraint grooves 64a to 67a and the restraint grooves 68a to 71a. ing. That is, a gap is formed between the first restraint portion 56b and the end face of the stator core 32a. In the circumferential direction of the restraint grooves 64a to 67a and the restraint grooves 68a to 71a, no obstacle is provided to block the directions.

A mechanism for constraining the conducting wire to the restraining portions 56a and 57a to conduct the wire will be described with reference to FIG.
FIG. 8 is a diagram showing a state in which the insulating member 55a is attached to the iron core member 51a and the conducting wire is constrained to the restraining portions 56a and 57a. That is, the lead wire 73 is linearly passed through the restraint grooves 64a and 66a, and is sandwiched and restrained in the respective grooves. The lead wire 74 is linearly passed through the restraint grooves 65a and 67a, and is sandwiched and restrained in the respective grooves. The lead wire 75 is linearly passed through the restraint grooves 68a and 70a, and is sandwiched and restrained in the respective grooves. The lead wire 76 is linearly passed through the restraint grooves 69a and 71a, and is sandwiched and restrained in the respective grooves. The lead wire 73 is cut on the restraint groove 66a side, and the lead wire 74 is cut on the restraint groove 67a side. The lead wire 75 is cut on the restraint groove 70a side, and the lead wire 76 is cut on the restraint groove 71a side.

Reference numerals 77 and 78 are pressure welding terminals fitted to the restraint portions 56a and 57a. The pressure welding terminals 77 and 78 are made of a piece of metal and are connected to two conducting wires to conduct conduction. The pressure welding terminal 77 is provided with a groove 77a and a groove 77b. Similarly, the pressure welding terminal 78 is provided with a groove 78a and a groove 78b. The width of the grooves 77a, 77b, 78a, 78b is narrower than the diameter of the lead wire constituting the stator winding 37.

The pressure welding terminal 77 is inserted through the opening of the first restraint portion 56a. When the pressure welding terminal 77 is pushed into the internal space of the first restraint portion 56a, the lead wire 73 is inserted into the groove 77a. Similarly, the lead wire 74 is inserted into the groove 77b. When the lead wire 73 is inserted into the groove 77a, the pressure welding terminal 77 breaks the coating of the lead wire, bites into the core wire, and reaches the core wire. As a result, the lead wire 73 is sandwiched between the grooves 77a. Similarly, when the lead wire 74 is inserted into the groove 77b, the pressure welding terminal 77 breaks the coating of the lead wire and bites into the core wire to reach it. As a result, the lead wire 74 is sandwiched between the grooves 77b. Then, the pressure welding terminal 77 reaches the core wire of the conducting wires 73 and 74 to conduct the conducting wires 73 and 74.

The pressure welding terminal 78 has the same mechanism, and is inserted through the opening of the second restraint portion 57a, and the lead wires 75 and 76 are sandwiched between the grooves 78a and 78b of the pressure welding terminal 78, and the pressure welding terminal 78 is the lead wire 75. It bites into the core wire of and 76, reaches it, and conducts the conducting wires 75 and 76.

Although the insulating member 55a has been described above, the insulating members 55b to 55i have the same structure, and although the description is omitted, the restraint portion, the restraint groove, the restraint method of the lead wire, the pressure welding terminal and the lead wire The connection method is exactly the same.

In the conventional insulating member, in consideration of work, the lead wire, that is, the stator winding 37 is pulled out and cut from the center of the stator core 32a toward the outer peripheral side in the radial direction, that is, the closed container 1. Therefore, the cut surface of the stator winding 37 is arranged so as to face the inner peripheral surface of the closed container 1.
By using the insulating members 55a to 55i having the structure as shown in FIG. 7, the restraining method and the restraining function are not changed, the cut surface of the stator winding 37 is changed by 90 degrees, and the circumference of the stator core 32a is changed. The direction is set to the inside of the stator core 32a, the cut surface of the stator winding 37 and the inner peripheral surface of the closed container 1 are orthogonal to each other, and the cut surface of the stator winding 37 faces the inner peripheral surface of the closed container 1. It was arranged so as not to let it. That is, by providing a restraint groove on the side surface of the stator cores 32a of the restraint portions 56a to 56i and 57a to 57i in the circumferential direction, the stator winding 37 is sandwiched between the restraint grooves from the radial direction of the stator core 32a. The arrangement in which the cut surface of the stator winding 37 and the inner peripheral surface of the closed container 1 are orthogonal to each other has been realized. As a result, the cut surface of the stator winding 37 is arranged so as to be separated from the closed container 1, and the insulation distance between the cut surface of the stator winding 37 and the inner peripheral surface of the closed container 1 can be secured. On the other hand, if such a structure is adopted, it is difficult to realize the conventional technique because there is a problem that a work space cannot be secured in the winding and cutting work of the stator winding 37. However, we realized a structure to improve this and incorporated it at the same time.

Next, the winding procedure for the stator core 32a will be described. Here, although it will be described with reference to FIG. 9, FIG. 9 is the same diagram as that of FIG.
First, the winding 54a is wound around the iron core member 51a. First, the winding start terminal portion 80a of the winding 54a is restrained in the restraining grooves 64a and 66a of the first restraining portion 56a of the insulating member 55a, and the winding 54a is started to be wound around the teeth 53a. After winding the winding 54a around the teeth 53a, the winding end terminal portion 81a of the winding 54a is constrained to the restraint grooves 68a and 70a of the second restraint portion 57a of the insulating member 55a to end the winding 54a.

Next, the winding 54b is wound around the adjacent iron core member 51b. The winding start terminal portion 80b of the winding 54b is constrained to the restraint grooves 64b and 66b of the first restraining portion 56b of the insulating member 55b, and the winding 54b is started to be wound around the teeth 53b. After winding the winding 54b around the teeth 53b, the winding end terminal portion 81b of the winding 54b is constrained to the restraint grooves 68b and 70b of the second restraint portion 57b of the insulating member 55b. Further, as shown in FIG. 10, the winding end terminal portion 81b of the winding 54b has a gap below the first restraint portion 56b of the insulating member 55b, that is, a gap between the first restraint portion 56b and the stator core 32a. Is passed to the adjacent iron core member 51a side. The first restraint portion 56b of the insulating member 55b is also provided with a restraint groove 72b corresponding to the restraint groove 72a, similarly to the first restraint portion 56a of the insulating member 55a. The winding end terminal portion 81b of the winding 54b is inserted through the restraint groove 72b and is restrained by the restraint grooves 69a and 71a of the second restraint portion 57a of the insulating member 55a as shown in FIG. When the pressure welding terminal 78 is inserted into the second restraint portion 57a of the insulating member 55a, the pressure welding terminal 78 bites into the winding end terminal portion 81a of the winding 54a and the winding end terminal portion 81b of the winding 54b to conduct conduction. Become. That is, the winding 54a and the winding 54b are connected.

Although the figure is omitted, the adjacent iron core member 51c is the same as the iron core member 51b. The winding start terminal portion 80c of the winding 54c is constrained to the restraint grooves 64c and 66c of the first restraining portion 56c of the insulating member 55c, and the winding 54c is started to be wound around the teeth 53c. After winding the winding 54c around the teeth 53c, the winding end terminal portion 81c of the winding 54c is constrained to the restraint grooves 68c and 70c of the second restraining portion 57c of the insulating member 55c. Further, the winding end terminal portion 81c of the winding 54c passes through a gap below the first restraining portion 56c of the insulating member 55c, that is, a gap between the first restraining portion 56b and the stator core 32a, and the iron core member. Pass it to the 51b side. The first restraint portion 56c of the insulating member 55c is also provided with a restraint groove corresponding to the restraint groove 72a, similarly to the first restraint portion 56a of the insulating member 55a. The winding end terminal portion 81c of the winding 54c is inserted into a restraint groove corresponding to the restraint groove 72a and is restrained by the restraint grooves 69b and 71b of the second restraint portion 57b of the insulating member 55b. When the pressure welding terminal is inserted into the second restraint portion 57b of the insulating member 55b, the pressure welding terminal bites into the winding end terminal portion 81b of the winding 54b and the winding end terminal portion 81c of the winding 54c, so that the pressure welding terminal is made conductive. That is, the winding 54b and the winding 54c are connected. Therefore, the three windings of the winding 54a, the winding 54b, and the winding 54c are connected to each other.

In the same procedure, the three windings of the winding 54d, the winding 54e, and the winding 54f are connected by using the winding end terminal portion of the winding 54e and the winding end terminal portion of the winding 54f. Further, the three windings of the winding 54g, the winding 54h, and the winding 54i are connected by using the winding end terminal portion of the winding 54h and the winding end terminal portion of the winding 54i.

Next, the winding group connected for each of the three windings is connected by a crossover. Here, although it will be described with reference to FIG. 11, FIG. 11 is the same view as that of FIG.
As described above, the crossover wire 58a is composed of a core wire that is a conductor and coatings 59a and 59b that cover the core wire. However, the first terminal portion 83, which is one terminal portion of the crossover line 58a, is not covered with the coatings 59a and 59b. Similarly, the second terminal 85, which is the other terminal of the crossover 58a, is not covered by the coatings 59a and 59b. That is, the crossover 58a has a first terminal portion 83 and a second terminal portion 85 that are not covered by the coatings 59a and 59b. Further, the crossover line 58a is provided with an intermediate portion 84 not covered by the coatings 59a and 59b near the middle between the first terminal portion 83 and the second terminal portion 85. Therefore, the intermediate portion 84 is arranged between the coatings 59a and 59b. Therefore, the coating 59a is the first coating arranged between the first terminal portion 83 and the intermediate portion 84, and the coating 59b is arranged between the second terminal portion 85 and the intermediate portion 84. It is the second coating.

The first terminal portion 83 of the crossover 58a is constrained to the first restraining portion 56a of the insulating member 55a. That is, the first terminal portion 83 of the crossover 58a is constrained by the restraint grooves 65a and 67a of the first restraint portion 56a.
The second terminal portion 85 of the crossover 58a is constrained by the first restraining portion 56g of the insulating member 55g. That is, the second terminal portion 85 of the crossover 58a is constrained over the restraint grooves 65g and 67g of the first restraint portion 56g.
The intermediate portion 84 of the crossover wire 58a is constrained to the first restraining portion 56d of the insulating member 55d. That is, the intermediate portion 84 of the crossover 58a is passed through the restraint grooves 65d and 67d of the first restraint portion 56d and restrained.

Then, by inserting the pressure welding terminals 77 into the first restraint portions 56a, 56d, 56g of each insulating member, the crossover wire 58a and the windings 54a, 54d, 54g can be connected.
That is, the winding 54a and the first terminal portion 83 are connected, the winding 54d and the intermediate portion 84 are connected, and the winding 54g and the second terminal portion 85 are connected. As a result, the crossover 58a connects three different windings, windings 54a, 54d, 54g.

The same applies to the crossover lines 58b and 58c. The crossover wire 58b is also composed of a core wire which is a conductor and coatings 59c and 59d covering the core wire. Both terminal portions not covered by the coatings 59c and 59d and an intermediate portion not covered by the coatings 59c and 59d are provided near the middle of both terminal portions. The crossover wire 58c is also composed of a core wire which is a conductor and coatings 59e and 59f covering the core wire. Both terminal portions not covered by the coatings 59e and 59f and an intermediate portion not covered by the coatings 59e and 59f are provided near the middle of both terminal portions.
The crossover 58b connects three different windings, windings 54b, 54e and 54h. The crossover 58c connects three different windings, windings 54i, 54c and 54f.

In this example, the connection points of the crossovers are set to three points, the first terminal portion, the second terminal portion, and the intermediate portion, and three different windings are connected. There may be three or more connection points for the wires, and three or more windings may be connected.
For example, if the connection points of the crossovers are provided at two points in the middle part in addition to the first terminal part and the second terminal part, four points can be connected and four windings can be connected. ..

The lead wire 60a is connected to the first restraint portion 56d of the insulating member 55d. The lead wire 60b is connected to the first restraint portion 56e of the insulating member 55e. The lead wire 60c is connected to the first restraint portion 56c of the insulating member 55c.

When the windings 54a to 54i and the crossover wires 58a to 58c are connected as described above, the result is as shown in FIG. FIG. 6 is an arrangement of FIG. 5, and will be described with reference to FIG.
The lead wires 60a to 60c are connected to the crossover wires 58a to 58c. The lead wire 60a is connected to the windings 54a, 54d, 54g via the crossover wire 58a. Therefore, the crossover wire 58a splits or merges the current passing through the lead wire 60a.

Similarly, the lead wire 60b is connected to the windings 54b, 54e, 54h via the crossover wire 58b, and the crossover wire 58b splits or merges the current passing through the lead wire 60b. The lead wire 60c is connected to the windings 54i, 54c, 54f via the crossover wire 58c, and the crossover wire 58c splits or merges the current passing through the lead wire 60c.

The windings 54a, 54b, 54c are connected by the winding end terminal portion 81b of the winding 54b and the winding end terminal portion 81c of the winding 54c to form a Y connection. That is, the winding end terminal portion 81b and the winding end terminal portion 81c form a neutral wire in the Y connection.
Similarly, the windings 54d, 54e, 54f are connected by the winding end terminal portion 81e of the winding 54e and the winding end terminal portion 81f of the winding 54f to form a Y connection, so that the winding end terminal portion 81e and the winding end terminal portion 81e are connected. The winding end terminal portion 81f constitutes a neutral wire in the Y connection. The windings 54g, 54h, 54i are connected by the winding end terminal portion 81h of the winding 54h and the winding end terminal portion 81i of the winding 54i to form a Y connection, so that the winding end terminal portion 81h and the winding end terminal are formed. The neutral line in the Y connection is formed by the part 81i.

By the way, conventionally, a crossover is used to connect adjacent windings. However, in the insulating members 55a to 55i having the structure as shown in FIG. 7, workability such as cutting of a crossover is poor. On the other hand, by using the winding end end portion of the winding to connect to the adjacent winding, the crossover is omitted and the work of cutting the crossover is omitted. That is, the workability is improved.

Specifically, after the winding end terminal portion 81b of the winding 54b is restrained by the second restraining portion 57b of the insulating member 55b, it is routed to the second restraining portion 57a of the insulating member 55a without being cut, and the second The winding end terminal portion 81b of the winding 54b is cut by being restrained by the restraining portion 57a of the winding 54b. This eliminates the need for the crossover and the work of cutting the crossover. That is, the work in a narrow space and the step of cutting the crossover can be omitted.
The structural relationship between the winding end terminal portion 81c of the winding 54c and the second restraining portion 57b of the insulating member 55b is exactly the same.

On the other hand, when the winding end terminal portion 81b of the winding 54b is routed to the second restraining portion 57a of the insulating member 55a, the first restraining portion 56b of the insulating member 55b blocks the routing direction and becomes an obstacle. However, the bottom surface of the first restraint portion 56b is arranged at a position distant from the bottom surface of the second restraint portion 57b with respect to the end surface of the iron core member 51b. That is, by arranging the first restraint portion 56b at a position away from the second restraint portion 57b with respect to the end surface of the iron core member 51b, an obstacle in the circumferential direction of the side surface of the second restraint portion 57b Was removed. As a result, the second restraining portion 57b of the insulating member 55b can be passed below the first restraining portion 56b of the insulating member 55b, and the lead wire can be easily wired to the second restraining portion 57a of the insulating member 55a.
Further, a restraint groove 72b is provided at the bottom of the first restraint portion 56b, and serves as a guide when the winding end terminal portion 81b of the winding 54b is routed to the second restraint portion 57a of the insulating member 55a. As a result, the winding end terminal portion 81b of the winding 54b can be routed substantially linearly toward the second restraining portion 57a of the insulating member 55a, and the space for routing the wiring can be reduced. Then, by connecting in the shortest time, electrical resistance can be suppressed and an efficient one can be assembled.
This is exactly the same with respect to the structural relationship when the winding end terminal portion 81c of the winding 54c is routed to the second restraining portion 57b of the insulating member 55b.

Further, the first restraining portion 56b of the insulating member 55b is arranged at a position away from the end surface of the iron core member 51b from the second restraining portion 57b of the insulating member 55b. That is, the height of the first restraint portion 56b with respect to the end surface of the iron core member 51b is made higher than the height of the second restraint portion 57b with respect to the end surface of the iron core member 51b, and the first restraint portion 56b and the second restraint portion are made higher. The height with 57b was changed. As a result, the side surface of the first restraint portion 56b and the side surface of the second restraint portion 57b are no longer completely opposed to each other. That is, there are no obstacles on the circumferential side surface of the first restraint portion 56b and the circumferential side surface of the second restraint portion 57b. That is, there are no obstacles in the circumferential direction of the restraint grooves 64b to 67b and the restraint grooves 68b to 71b, and a space is formed. As a result, after restraining each terminal portion in the restraint groove, a work space for cutting the terminal portion can be secured, and workability is not impaired.

Then, since the side surface of the first restraint portion 56b and the side surface of the second restraint portion 57b do not face each other, the cut surface of the lead wire restrained by the restraint grooves 64b to 67b and the side surface of the restraint groove 68b to 71b are restrained. The cut surfaces of the wires do not face each other, and it is easier to secure the insulation distance between the cut surfaces of the wires.

Furthermore, since the end end of the winding is stretched and used for connection with the adjacent winding, the number of cut surfaces of the exposed wire that is restrained by the restraint groove is reduced, and there is a concern about securing the insulation distance. The number of places has decreased.

This is exactly the same with respect to the structural relationship between the first restraint portion 56a and the second restraint portion 57a of the insulating member 55a, and the first restraint portion 56c and the second restraint portion 57c of the insulating member 55c. is there.

In summary, the restraint groove of the restraint portion of the insulating member is provided so as to sandwich the lead wire inserted in the restraint groove in the radial direction of the stator, so that the end portion of the winding wound restrained by the restraint groove is cut. The cut surface of the end portion of the surface and the crossover is also arranged so as to face the direction orthogonal to the radial direction of the stator, that is, the circumferential direction of the stator. As a result, those cut surfaces that have been conventionally arranged so as to face the inner peripheral surface of the closed container are arranged so as not to face the inner peripheral surface of the closed container without impairing the restraining method and the function of restraining. The arrangement is such that the stator core faces the inside. That is, each cut surface can be arranged away from the closed container, and the insulation distance between the cut surface of the end portion of the winding and the cut surface of the end portion of the crossover and the inner peripheral surface of the closed container is set. I made it possible to secure it.

Further, when connecting adjacent windings, the winding end terminal portion of the winding is routed to the restraining portion of the adjacent winding in the circumferential direction of the stator, and the adjacent windings are connected to each other. As a result, the crossover line, which has been conventionally required, can be omitted, and the necessary cutting work can be omitted. By reducing the number of work steps against the shortage of work space for cutting work and the deterioration of workability of cutting work that occur when the end part of the winding and the end part of the crossover are oriented in the circumferential direction of the stator. Improvement can be achieved.
Further, the restraint groove of the restraint portion of the insulating member is provided so that the lead wire inserted in the restraint groove is sandwiched in the radial direction of the stator so that the sandwiched lead wire can be routed in the circumferential direction of the stator. The winding end end of the winding can be connected to the restraining part of the adjacent winding in the circumferential direction at the shortest distance without bending, ensuring high routing efficiency and electrical efficiency. it can.
In particular, important connections such as neutral wires could be made without using crossover wires, and their reliability could be improved.

Further, the arrangement of the restraining portion of the insulating member that restrains the winding start terminal portion of the winding and the restraining portion of the insulating member that restrains the winding end terminal portion of the winding is changed with respect to the end face of the iron core member. That is, the first restraining portion of the insulating member that restrains the winding start terminal portion of the winding is separated from the second restraining portion of the insulating member that restrains the winding end terminal portion of the winding with respect to the end face of the iron core member. It was placed in the same position. That is, the height of the first restraint portion with respect to the end face of the iron core member is made higher than the height of the second restraint portion with respect to the end face of the iron core member, and the height of the first restraint portion and the second restraint portion is set. changed. As a result, the side surface of the first restraint portion and the side surface of the second restraint portion do not completely face each other, and the side surface in the circumferential direction of the first restraint portion and the circumferential direction of the second restraint portion. There are no obstacles on the side of. That is, after restraining each terminal portion in the restraint groove, a work space for cutting the terminal portion can be secured, and workability is not impaired.
That is, the structure of the present application has made it possible to reduce the number of work steps and secure a work space.

Further, when the winding end end portion of the winding is routed to the restraint portion of the adjacent winding, the adjacent restraint portion becomes an obstacle, but the first restraint portion of the insulating member that restrains the winding start end portion of the winding. The bottom surface of the core member was arranged at a position away from the bottom surface of the second restraint portion of the insulating member that restrains the winding end end portion of the winding. As a result, the winding end terminal portion of the winding can pass under the first restraint portion and be routed substantially linearly toward the restraint portion of the adjacent insulating member, and the space for routing the wiring can be reduced. .. Then, by connecting in the shortest time, electrical resistance can be suppressed and an efficient one can be assembled.

Further, by providing a restraint groove at the bottom of the first restraint portion and using the winding end end end portion as a guide when routing the winding end end end portion to the restraint portion of the adjacent insulating member, the winding end end end portion of the winding can be formed. Furthermore, it has become possible to easily route the coil in a nearly straight line, reduce the space for routing, and connect in the shortest time.

Further, since the side surface of the first restraint portion and the side surface of the second restraint portion do not face each other, the cut surfaces of the lead wires constrained by the restraint groove do not face each other, and the cut surfaces of the lead wires do not face each other. It has become easier to secure the insulation distance.

Furthermore, since the end end of the winding is stretched and used for connection with the adjacent winding, the number of cut surfaces of the exposed wire that is restrained by the restraint groove is reduced, and there is a concern about securing the insulation distance. The number of places also decreased.

Further, the restraint groove of the restraint portion of the insulating member is provided so that the lead wire inserted in the restraint groove is sandwiched in the radial direction of the stator so that the sandwiched lead wire can be routed in the circumferential direction of the stator with a small number of bends. Therefore, it has become possible to more easily connect distant windings that are not adjacent to each other with a single crossover. That is, in addition to the terminal portions at both ends of the crossover wire, the intermediate portion of the crossover wire is constrained in the restraint groove of the restraint portion of the insulating member so that it can be connected to the winding at the pressure welding terminal. Can now be connected with a single crossover. As a result, wasteful cutting work and work space are not required, and the number of crossovers used can be reduced. Furthermore, it has become possible to connect with a small number of crossover bends, the connection distance is short, and electrical resistance can be suppressed. That is, efficient stator windings have come to be assembled.

1 Closed container, 2 Compression mechanism, 3 Electric mechanism, 4 Crankshaft, 5 Suction connection pipe, 6 Discharge pipe, 7 Connection terminal, 11 Upper container, 12 Lower container, 21 Rolling piston, 22 Cylinder, 23 Main bearing, 24 Sub-bearings, 25 Discharge mufflers, 25a openings, 31 rotors, 31a rotor cores, 31b shaft holes, 31c magnet insertion holes, 32 stators, 32a stator cores, 32b back yokes, 32c teeth, 32d slots, 33 Permanent magnet, 34a upper balance weight, 34b lower balance weight, 35 rivets, 36 communication holes, 37 stator windings, 38 insulation members, 39 lead wires, 39a terminals, 41 main shafts, 42 sub-shafts, 43 eccentric shafts Parts, 51a to 51i Iron core members, 52a to 52i back yokes, 53a to 53i teeth, 54a to 54i windings, 55a to 55i insulating members, 56a to 56i first restraint parts, 57a to 57i second restraint parts, 58a ~ 58c Crossover wire, 59a ~ 59f coating, 60a ~ 60c lead wire, 61 back yoke part of insulation member, 62 tooth part of insulation member, 63 protrusion, 64a ~ 64c, 65a ~ 65b, 65d, 65g, 66a ~ 66c, 67a-67b, 67d, 67g Restraint groove of the first restraint, 68a-68c, 69a-69b, 70a-70c, 71a-71b Restraint of the second restraint, 72a-72b Restraint of the first restraint Groove, 73,74,75,76 Lead wire, 77,78 Pressure welding terminal, 77a, 77b, 78a, 78b Groove of pressure welding terminal, 80a-80c winding start terminal part, 81a-81c, 81e, 81f, 81h, 81i winding end Terminal part, 83 first terminal part of crossing line, 84 middle part of crossing line, 85 second terminal part of crossing line, 100 sealed compressor, 101 suction muffler.

Claims (10)

A cylindrical stator core with multiple magnetic pole teeth on the inner circumference,
A winding wound through an insulating member attached to the magnetic pole tooth, and a winding
A first restraining portion provided on the axial end surface of the stator core of the insulating member and restraining the winding start terminal portion of the winding, and a first restraining portion.
A second restraining portion provided on the axial end surface of the stator core of the insulating member and restraining the winding end terminal portion of the winding, and a second restraining portion.
With
The first restraint portion is separated from the end face of the stator core by the second restraint portion so that a gap is formed between the first restraint portion and the end face of the stator core. Placed in position,
The winding end terminal portion of the winding passes through the gap after being restrained by the second restraining portion.
In addition to being restrained by the restraining portion of the insulating member of the adjacent magnetic pole teeth,
The first restraint portion and the second restraint portion are such that the cut surface of the winding start terminal portion of the winding and the cut surface of the winding end terminal portion of the winding face the inside of the stator core. A stator that restrains the winding. The stator according to claim 1, wherein at the winding end terminal portion of the winding, the winding and the winding wound around the adjacent magnetic pole teeth are connected. The first restraint portion and the second restraint portion are provided with a restraint groove.
The stator according to claim 1 or 2 , wherein the restraint groove is provided so as to sandwich the winding start terminal portion of the winding and the winding end terminal portion of the winding from the radial direction of the stator core. .. A crossover consisting of a conductor and a coating covering the conductor.
One end of the crossover, the other end of the crossover, and an intermediate portion of the crossover are each constrained by a first restraint of a different insulating member of the magnetic pole teeth. together with the first restraining portion, a stator according to any one of claims 1 to 3, also cut surface of the terminal portion of the crossover wire be constrained to face inward of said stator core. The stator according to claim 4 , wherein the crossover wire connects three or more windings of the different magnetic pole teeth by a pressure welding terminal. A lead wire that supplies power and is constrained by the first restraint portion is provided.
The pressure contact terminal, the stator according to claims 1, lead and said winding is connected to any one of 5. Motor comprising a stator according to any one of claims 1 to 6, and a rotor provided inside the stator. With a closed container
The electric mechanism unit provided in the closed container and
A compression mechanism driven by the electric mechanism and
With
The electric mechanism unit
A cylindrical stator core with multiple magnetic pole teeth on the inner circumference,
A winding wound through an insulating member attached to the magnetic pole tooth, and a winding
A first restraining portion provided on the axial end surface of the stator core of the insulating member and restraining the winding start terminal portion of the winding, and a first restraining portion.
A second restraining portion provided on the axial end surface of the stator core of the insulating member and restraining the winding end terminal portion of the winding, and a second restraining portion.
With
The first restraint portion is separated from the end face of the stator core by the second restraint portion so that a gap is formed between the first restraint portion and the end face of the stator core. Placed in position,
The winding end terminal portion of the winding passes through the gap after being restrained by the second restraining portion.
In addition to being restrained by the restraining portion of the insulating member of the adjacent magnetic pole teeth,
The first restraint portion and the second restraint portion are such that the cut surface of the winding start terminal portion of the winding and the cut surface of the winding end terminal portion of the winding face the inside of the stator core. A sealed compressor that restrains the winding. The closed compressor according to claim 8 , wherein the cut surface of the winding bound to the first restraining portion and the second restraining portion is restrained so as to be orthogonal to the inner peripheral surface of the closed container. The first restraint portion and the second restraint portion are provided with a restraint groove.
The closed compressor according to claim 9 , wherein the restraint groove is provided so as to sandwich the winding from the radial direction of the stator core.

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