JP2015052309A - Electric oil pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new electric oil pump capable of avoiding disadvantages such as a short circuit and the like at a part of a crossover even if the part is moved toward a side surface wall of a stator storing part.SOLUTION: A gist of this invention consists in the fact that an intermediate insulation member having an insulation function is present between a crossover stored in a crossover guide and a side surface wall of a stator storing part. More in detail, an insulator body extending from a part of a casing constituting a drive control part is extended out between the crossover stored in the crossover guide and the side surface wall of the stator storing part. Since the intermediate insulation member having an insulation function is present between the crossover stored in the crossover guide and the side surface wall of the stator storing part, it is possible to prevent a short circuit from occurring between the crossover and the side surface wall of the stator storing part by the insulation function of the intermediate insulation member even if the crossover and the intermediate insulation member are rubbed to each other to peel off enamel.

Description

  The present invention relates to an electric oil pump, and more particularly to an electric oil pump including a drive control unit fixed adjacent to an electric motor unit.

  Conventionally, trochoid internal gear pumps are often used as electric oil pumps mounted on automobile transmissions and the like. The internal gear pump is formed between the inner teeth of the outer rotor and the outer teeth of the pump rotor by rotating the outer rotor having the inner teeth meshing with the outer teeth of the pump rotor by rotating the pump rotor by the drive rotating shaft. The volume of the plurality of volume chambers is continuously changed, and oil is sucked and discharged.

  The electric oil pump includes a drive control unit that controls energization to the motor unit, a stator unit that includes the winding and iron core that constitutes the motor unit and generates magnetomotive force by energization from the drive control unit, and the motor A rotor portion having a permanent magnet in the inner circumferential space of the stator portion and rotating by magnetomotive force, a driving rotary shaft fixed to the rotor portion by means such as press-fitting and rotating integrally, and this driving rotation And a pump rotor portion that rotates integrally with the shaft by means such as press-fitting. Such an electric oil pump is described in, for example, Japanese Patent Application Laid-Open No. 2012-207638 (Patent Document 1).

JP 2012-207638 A

  In such an electric oil pump, the winding start end portion and winding end end portion of the windings of each phase wound around the iron core of the stator portion constituting the electric motor portion are fixed adjacent to the electric motor portion. It is attracted in the drive control part formed as a product case. That is, the winding start end portion and winding end end portion of each phase winding are connected to the inverter circuit provided on the inverter board of the drive control unit through the insertion hole provided in the drive control unit. Here, the windings of each phase (U phase, V phase, W phase) are wound around a plurality of salient pole portions projecting radially on the inner peripheral side of the stator, and the same phase is wound around the salient pole portion. These windings are connected via a jumper wire that passes through a guide housing groove of a jumper guide provided around the outer periphery of the stator. This connecting wire extends from the winding wound around the plurality of salient pole portions.

  The winding end of each phase winding extends toward the insertion hole of the drive control unit, and is further inserted into the insertion hole of the drive control unit and applied to the neutral terminal provided in the drive control unit by a thermocompression bonding method or the like. It is fixed using.

  When the assembly of the electric pump is completed and completed, when mounted on an actual automobile and used for some reason, a part of the crossover wire stored in the guide storage groove of the crossover guide contains the stator. An event occurs in which the metal storage unit made of aluminum alloy moves toward the side wall of the storage unit and contacts the side unit. For this reason, a vibration phenomenon may occur between the crossover wire and the side wall of the storage unit due to vibration caused by the traveling of the automobile, and the enamel coating on the crossover wire may be peeled off. When the enamel coating is peeled off, the connecting wire is grounded at this portion, which causes a short circuit.

  In addition to the short-circuit problem, the stator is housed in a housing portion made of an aluminum alloy. The stator and the housing portion are fixed by shrink fitting. For this reason, there existed a subject that the storage part and the stator part generate | occur | produced thermal deformation, both accuracy, such as a coaxial degree and roundness, deteriorated, and the reliability as a product fell.

  A first object of the present invention is to provide a novel electric oil pump capable of avoiding problems such as a short circuit in this portion even when a part of the crossover wire moves in the direction of the side wall of the storage portion of the stator. It is to provide.

  A second object of the present invention is to provide a novel electric oil pump that can improve the accuracy of coaxiality, roundness, etc. by adopting a fixing method in which the fixing between the stator and the storage portion thereof is not easily deformed. It is to provide.

  The first feature of the present invention resides in that an intermediate insulating member having an insulating function is interposed between the crossover wire stored in the crossover guide and the side wall of the storage portion of the stator. More specifically, an insulator extending from a part of the housing constituting the drive control unit is extended between the crossover wire stored in the crossover guide and the side wall of the storage unit of the stator.

  The second feature of the present invention is that a pressing member extending from a part of the casing constituting the drive control unit is extended between the crossover stored in the crossover guide and the side wall of the storage unit of the stator, The pressing member presses the stator against the bottom wall of the storage portion, and a rotation preventing portion is formed between the stator and the storage portion.

  According to the present invention, since the intermediate insulating member having an insulating function is interposed between the crossover wire stored in the crossover guide and the side wall of the storage portion of the stator, the crossover wire and the intermediate insulating member are rubbed. Even if the enamel is peeled off, it is possible to avoid the occurrence of a short circuit between the crossover and the side wall of the stator housing portion by the insulating function of the intermediate insulating member.

  Further, according to the present invention, the stator is pressed against the bottom wall of the storage portion by the pressing member, and the rotation prevention portion is formed between the stator and the storage portion, so that the stator and the storage portion are thermally deformed like shrink fitting. The accuracy of the coaxiality, roundness, etc. can be improved and the reliability as a product can be improved.

1 is an overall perspective view of an electric oil pump to which the present invention is applied. It is a disassembled perspective view of the electric oil pump shown in FIG. It is a longitudinal cross-sectional view of the electric oil pump shown in FIG. It is a perspective view of the stator part which gave the coil | winding. It is principal part sectional drawing of the stator part which becomes one Example of this invention. It is principal part sectional drawing of the housing which becomes one Example of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the following embodiments, and various modifications and application examples are included in the technical concept of the present invention. Is also included in the range.

  Hereinafter, an embodiment of an electric oil pump according to the present invention will be described with reference to the drawings. The electric oil pump is, for example, a pump mounted for an automatic transmission of a vehicle having an idle stop function. This automatic transmission is a belt-type continuously variable transmission, and includes a mechanical pump that is driven by an engine.

  When the engine is stopped by the idle stop control, the hydraulic pressure by the mechanical pump cannot be secured, and if the hydraulic pressure decreases due to a frictional engagement element or a leak from the pulley in the belt type continuously variable transmission, it is necessary for restarting. Since it takes time to secure the hydraulic pressure, the operability is reduced. Therefore, in addition to the mechanical pump, an electric oil pump that can discharge hydraulic pressure regardless of the operating state of the engine is provided, and the engine is restarted and restarted by securing the hydraulic pressure corresponding to the leakage from the frictional engagement elements and pulleys. The driving performance at the time is improved.

  FIG. 1 is a perspective view showing the overall configuration of the electric oil pump, and FIG. 2 is an exploded perspective view of the electric oil pump. The electric oil pump 10 includes an electric motor unit 10A, a drive control unit 10B fixed adjacent to the electric motor unit 10A, and a pump unit 10C driven by the electric motor unit 10A.

  As shown in FIG. 2, the electric motor unit 10 </ b> A includes at least a rotor unit 16 and a stator unit 18. The electric motor unit 10A is accommodated in an electric motor unit accommodating unit 24 provided on one side of a metal housing 20 made of, for example, an aluminum alloy.

  In addition, a pump portion storage portion 22 for storing the pump 10 </ b> C is formed on the other side of the housing 20. The drive control unit 10B includes at least a housing 44, a control board 46 accommodated in the housing 44, and a cover 48 fixed to the housing 44 so as to accommodate the control board 46. The pump unit 10C includes at least a pump rotor 12 having an external gear and an outer rotor 14 having an internal gear. The pump rotor 12 and the outer rotor 14 are accommodated in a pump portion accommodating portion 22 provided on the other side of the housing 20.

  A more detailed structure of the electric oil pump 10 will be described with reference to FIG. The electric oil pump 10 includes a pump portion 10C including a pump rotor 12 having an external gear and an outer rotor 14 having an internal gear, a rotor portion 16 coupled to the pump rotor 12, and a stator portion 18. And an electric motor unit 10A. A winding 18A is wound around the stator unit 18, and this winding is drawn into a drive control unit 10B described later.

  These pump part 10c and electric motor part 10A are accommodated in a pump part accommodating part 22 provided on one end surface of the housing 20 and an electric motor part accommodating part 24 provided on the other end face. That is, the housing 20 has a pump portion accommodating portion 22 that rotatably accommodates the outer rotor 14 inside the one end surface side, and fixedly supports the stator portion 18 on the inner peripheral side of the opening on the other end surface side, and the rotor portion inside. An electric motor unit storage unit 24 for storing 16 and the like is formed, and a bracket 26 for attachment to the automatic transmission is formed outside the motor unit storage unit 24 in the axial direction.

  Further, in the housing 20, a cylindrical bearing portion 30 that rotatably supports a drive rotating shaft 28 that couples the pump rotor 12 and the rotor portion 16, and this bearing portion 30 is coupled to the outer periphery of the housing 20 and a pump. A partition wall is provided for isolating between the part housing part 22 and the motor part housing part 24. The drive rotary shaft 28 is supported on the inner periphery of the bearing portion 30. Further, a seal member 32 for sealing the drive rotary shaft 28 is provided above the drive rotary shaft 28 and the bearing portion 30.

  The pump cover 34 has a discharge port 36 that extends in a cylindrical shape that communicates with the discharge port of the pump unit 10C, and a suction port 38 that communicates with the suction port of the pump unit 10C. A seal ring 40 is attached to the outer periphery of the distal end of the discharge port 36.

  A housing 44 constituting the drive control unit 42 is fixed to the housing 20 on the side of the motor unit storage unit 24 so as to face the motor unit storage unit 24 in a sealed manner. Here, in FIG. 1 and FIG. 2, the drive control unit 10 </ b> C is described, but it is the same as the drive control unit 42 shown in FIG. 3. The drive control unit 42 includes a housing 44 made of synthetic resin fixed to the housing 20, a control board 46 accommodated in the housing 44, and a cover 48 made of synthetic resin fixed to the housing 44 and covering the control board 46. Has been. On the control board 46, an inverter circuit for supplying a controlled current to the winding 18A wound around the stator portion 18 of the electric motor portion 10A is mounted. A connector terminal 50 is attached between the housing 44 and the cover 48 to supply power to an electrical component (for example, an inverter circuit) placed on the control board 46.

  In such an electric oil pump 10, the winding start end portion and winding end end portion of the winding 18 </ b> A wound around the stator portion 18 constituting the electric motor portion 10 </ b> A are fixed adjacent to the electric motor portion storage portion 24. The drive control unit 42 is connected to an input terminal (not shown) and a neutral terminal (not shown) provided in the case 44 through an insertion hole (not shown) provided in the case 44. Therefore, the drive signal controlled by the inverter circuit is supplied to the winding 18A to rotate the rotor portion 16 of the electric motor portion 10A, and finally the pump rotor 12 is rotated to perform the pump action.

  Next, the detailed structure of the stator part 18 which comprises the electric motor part 10A is demonstrated based on FIG. In FIG. 4, the iron core 18 </ b> B constituting the stator portion 18 is composed of laminated silicon steel plates and the like, and has nine salient pole portions extending radially toward the inner peripheral side. A bobbin portion 18C made of an insulating synthetic resin is provided around the salient pole portion. The bobbin portion 18C has a function of ensuring insulation between the winding wound around itself and the salient pole portion.

  The nine salient pole portions are arranged so as to be adjacent to each other, and an insulating portion 18D is provided on the inner peripheral portions of the bobbin portion 18C and the iron core 18B. The bobbin portion 18C and the insulating portion 18D are integrally formed by injecting an insulating synthetic resin. The insulating portion 18D is formed to protrude by a predetermined length in the axial direction of the iron core 18B, and the insulating surface 18E in the radial direction is formed in a substantially flat shape.

  A crossover guide 52 for guiding a crossover that connects the in-phase winding portions of each phase is formed on the insulating portion surface 18E so as to be planted between the bobbins 18C. The crossover guides 52 are planted so as to be scattered between the bobbin portions 18C on the circumference of the insulating portion surface 18E. Similarly, a crossover guide 54 that functions as a crossover guide and guides the crossover is also formed on the back side (outer peripheral side) of the bobbin portion 18C protruding outward from the insulating portion surface 18D. Guide storing grooves 52A and 54A for storing the connecting wires 18A-S (shown in FIG. 5) are formed on the outer peripheral walls of the connecting wire guides 52 and 54. The connecting wire extends from the winding portion wound around the bobbin portion 18C of each phase, but the connecting wire is omitted in FIG.

  The bobbin portion 18C covering the salient pole portion is wound with the winding 18A of each phase, and is usually arranged in the order of the U phase, the V phase, and the W phase. Further, in this embodiment, nine bobbin portions 18C are formed in the iron core 18B in order to wind the windings of each phase into three. In FIG. 4, a U-phase bobbin portion 18C-U1, a V-phase bobbin portion 18C-V1, and a W-phase bobbin portion 18C-W1 are combined into one set, and a U-phase bobbin portion 18C-U2 and a V-phase bobbin. 18C-V2 and W-phase bobbin 18C-W2 are combined into one set, and U-phase bobbin 18C-U3, V-phase bobbin 18C-V3, and W-phase bobbin 18C-W3 are combined into one set. These are arranged in order.

  The windings extending from the winding start end of the U phase, the winding start end of the V phase, and the winding start end of the W phase are in-phase bobbin portions 18C-U1 to 18C-U3, 18C-V1 to 18C- V3 and 18CW1 to 18C-W3 are respectively wound through a crossover.

  That is, the U-phase winding is wound around the U-phase bobbin portion 18C-U1 to form the winding portion 18A-U1, and the wound U-phase winding is guided by the crossover guides 52 and 54. The U-phase winding is wound around the U-phase bobbin portion 18C-U2 to form a winding portion 18A-U2. It is wound around U3 to form a winding portion 18A-U3, which is followed by a winding end end portion. This winding end is attracted into the housing 44 and connected to the neutral terminal. In FIG. 4, the bobbin portion and the winding portion are shown using the same lead wire. The same applies to the following.

The V-phase winding is wound around the V-phase bobbin portion 18C-V1 to become the winding portion 18A-V1, and the wound V-phase winding is guided by the crossover guides 52 and 54 to be V-phase. Are wound around the bobbin portion 18C-V2 to form a winding portion 18A-V2. Similarly, the wound V-phase winding is guided by the crossover guides 52 and 54 to the V-phase bobbin portion 18C-V3. Winding is performed to form the winding portion 18A-V3, and this is followed by the winding end portion. The winding end is attracted into the housing 44 and connected to the neutral terminal. Similarly, the W-phase winding is wound around the W-phase bobbin portion 18C-W1. The W-phase winding that has been wound is guided by the crossover guides 52 and 54 and wound around the W-phase bobbin portion 18C-W2 to form the winding portion 18A-W2. The wound W-phase winding is guided by the crossover guides 52 and 54 and wound around the W-phase bobbin portion 18C-W3 to form the winding portion 18A-W3. It becomes. The winding end 18 is attracted into the housing 44 and connected to the neutral terminal.

  By the way, when the assembly of the electric oil pump using the stator portion 18 is finished and used in an actual automobile, the crossover wires stored in the guide storage grooves 52A and 54A of the crossover guides 52 and 54 are used. This causes an event that a part of the motor moves in the direction of the side wall of the metal electric motor unit storage unit 24 storing the stator unit 18 and contacts the side wall of the motor unit storage unit 24. For this reason, the vibration caused by the traveling of the automobile may cause a rubbing phenomenon between the crossover wire and the side wall of the motor unit storage unit 24, and the enamel coating of the crossover wire may be peeled off. When the enamel coating is peeled off, the connecting wire is grounded at this portion, which causes a short circuit.

  In order to cope with such a problem, in this embodiment, an insulating function is provided between the crossover wires stored in the crossover guides 52 and 54 and the side wall of the motor unit storage unit 24 in which the stator unit 18 is stored. By interposing an intermediate insulating member, a short circuit at this portion is avoided.

  In addition to the short-circuit problem, the stator portion 18 is accommodated in the electric motor portion accommodating portion 24. The fixing method between the stator portion 18 and the electric motor portion accommodating portion 24 is performed by shrink fitting. For this reason, the stator part 18 and the motor part accommodating part 24 generate | occur | produced the heat deformation, there existed a subject that precision deteriorated in points, such as coaxiality and roundness, and the reliability as a product fell.

  In order to deal with such a problem, in the present embodiment, the drive control unit 42 is provided between the crossovers stored in the crossover guides 52 and 54 and the side wall of the motor unit storage unit 24 in which the stator unit 18 is stored. A pressing member extending from a part of the housing 44 constituting the housing is extended, the stator member 18 is pressed against the bottom surface portion of the electric motor unit storage unit 24 by the pressing member, and further, between the stator unit 18 and the electric motor unit storage unit 24. By forming the anti-rotation portion, the stator portion 18 can be fixed to the motor portion storage portion 24 without using a fixing method that causes deformation such as shrink fitting, and the accuracy such as coaxiality and roundness is improved. And improve the reliability of the product.

  Hereinafter, these detailed configurations will be described with reference to FIG. In FIG. 5, the stator portion 18 is housed in the motor portion housing portion 24 through a slight gap with the side wall 24 </ b> A. An intermediate insulating member 56 is interposed between the crossover guides 52 and 54 provided in the stator portion 18 and the side wall 24A of the motor portion storage portion 24.

  If the intermediate insulating member 56 extends at least to a portion where the crossover wires 18A-S housed in the crossover guides 52 and 54 are present, a short circuit at this portion can be avoided. Further, the intermediate insulating member 56 is formed integrally with the housing 44. In this embodiment, the housing 44 is made of synthetic resin, and thus functions as an insulator as a whole. With such a configuration, the formation of the housing 44 and the formation of the intermediate insulating member 56 can be performed together, so that the number of man-hours can be reduced.

  Further, when the intermediate insulating member 56 is separated from the housing 44 to form the annular synthetic resin intermediate insulating member 56, even if the housing 44 is made of a metal such as an aluminum alloy and the strength is increased, the intermediate insulating member made of synthetic resin is used. If 56 extends to at least a portion where the crossover wires 18A-S housed in the crossover guides 52 and 54 are present, a short circuit at this portion can be avoided.

  Further, when the strength is increased by making the casing 44 and the intermediate insulating member 56 entirely made of metal, an insulating paint is applied to the inner periphery of the intermediate insulating member 56 facing the crossover wires 18A-S to ensure an insulating function. You can also In this way, the insulating function can be ensured by a simple operation of applying the insulating paint.

  In the present embodiment, an intermediate insulating member having an insulating function is interposed between the connecting wires 18A-S stored in the connecting wire guides 52 and 54 and the side wall 24A of the motor unit storing unit 24 in which the stator unit 18 is stored. By doing so, it becomes possible to avoid a short circuit in this portion.

  Furthermore, as shown in FIG. 5, the intermediate insulating member 56 also functions as a pressing member. In the following description, the intermediate insulating member 56 is referred to as the pressing member 56.

  The pressing member 56 has a structure that makes contact with the stator portion 18 so as to press the stator portion 18 downward in the drawing beyond at least the portion where the connecting wire 18A-S accommodated in the connecting wire guides 52, 54 exists. . That is, as described above, the stator portion 18 is housed in the motor portion housing portion 24 through a slight gap with the side wall 24A. Therefore, the stator portion 18 can move in the axial direction with respect to the motor portion storage portion 24. Thereby, a fixing method different from the fixing method by shrink fitting can be adopted.

  In this state, the pressing member 56 acts to restrict the movement of the stator portion 18 in the axial direction by pressing the stator portion 18 against the bottom surface portion of the motor portion storage portion 24. The pressing member 56 is in contact with the entire outer peripheral surface of the stator portion 18 and presses the stator portion 18 to the bottom surface portion side of the electric motor unit storage portion 24 or is partially in contact with the entire outer peripheral surface to cause the stator portion 18 to be in contact with the electric motor. You may make it press on the bottom face part side of the part accommodating part 24. FIG. When the functions of the intermediate insulating member 56 described above are provided together, it is necessary to provide the pressing member 56 at a position corresponding to the crossover guides 52 and 54.

  Since the pressing member 56 is in contact with the outer peripheral surface of the stator portion 18 beyond the connecting wires 18A-S accommodated in the connecting wire guides 52, 54, the pressing member 56 can also be used as the intermediate insulating member 56. . In this embodiment, the pressing member 56 is formed integrally with the housing 44, and the housing 44 is formed of a synthetic resin, and thus functions as an insulator as a whole. With such a configuration, the functions of both the pressing member 56 and the intermediate insulating member 56 can be provided at the same time.

  In addition, when the housing 44 and the pressing member 56 are made of metal over the whole to increase the strength, an insulating paint may be applied to the inner periphery of the pressing member 56 facing the crossover wires 18A-S to ensure an insulating function. it can. With such a configuration, the functions of both the pressing member 56 and the intermediate insulating member 56 can be provided at the same time. In addition, the insulating function can be secured by a simple operation of applying the insulating paint.

  In this way, the axial movement of the stator portion 18 can be restricted by the pressing member 56 formed on the housing 44 and the axial direction can be fixed.

  On the other hand, the rotation direction fixing method adopts the following configuration. As shown in FIG. 6, a concave portion 58 </ b> A constituting one of the rotation preventing portions is formed on the side surface portion 24 </ b> A of the motor portion storage portion 24 formed in the housing 20, and the concave portions 58 </ b> A are equally spaced or unequal spaced. Four are formed. In the embodiment, four are provided at unequal intervals. As a result, positioning between the stator unit 18 and the motor unit storage unit 24 can be performed.

  At the same time, as shown in FIG. 4, four protrusions 58 </ b> B corresponding to the recesses 58 </ b> A are provided on the outer periphery of the stator portion 18 at unequal intervals in accordance with the recesses 58 </ b> A provided in the motor unit storage portion 24. . When the stator unit 18 is stored in the motor unit storage unit 24, the convex portion 58 </ b> B of the stator unit 18 is fitted into the recess 58 </ b> A formed on the side surface 24 </ b> A of the motor unit storage unit 24, and the stator unit 18 is in the motor unit storage unit 24. In contrast, movement in the rotational direction is restricted.

  Here, the anti-rotation portion may be different from the above-described configuration. For example, the stator portion 18 and the motor portion storage portion 24 can be fixed by pins. In short, it is sufficient that the movement in the rotational direction between the stator unit 18 and the motor unit storage unit 24 can be regulated.

  In the present embodiment, the stator portion 18 is housed in the motor portion housing portion 24 through a slight gap with respect to the side wall 24A. Therefore, the stator portion 18 can move in the axial direction with respect to the motor portion storage portion 24. In such a configuration, the axial movement of the stator portion 18 is restricted by the pressing body 56 (which also functions as an intermediate insulating member in this embodiment) provided on the housing 44, and the stator portion 18 and the motor portion storage portion The movement of the stator 18 in the rotational direction is restricted by the anti-rotation portions 58A and 58B formed between 24.

  Therefore, unlike the shrink fitting, the stator and the housing are not thermally deformed, and the accuracy such as the coaxiality and the roundness is improved and the reliability as a product can be enhanced.

  As described above, according to the present invention, the intermediate insulating member having an insulating function is interposed between the connecting wire stored in the connecting wire guide and the side wall of the storage portion of the stator. As a result, since the intermediate insulating member having an insulating function is interposed between the crossover wire stored in the crossover guide and the side wall of the stator storage portion, the crossover wire and the intermediate insulating member rub against each other and the enamel is rubbed. Even if it is peeled off, it is possible to avoid the occurrence of a short circuit between the crossover and the side wall of the stator housing portion by the insulating function of the intermediate insulating member.

  Further, according to the present invention, the pressing member extending from a part of the casing constituting the drive control unit is extended between the connecting wire stored in the connecting wire guide and the side wall of the storage unit of the stator. The stator is pressed against the bottom wall of the storage portion by the pressing member, and a rotation preventing portion is formed between the stator and the storage portion. According to this, since the stator is pressed against the bottom wall of the storage portion by the pressing member, and the anti-rotation portion is formed between the stator and the storage portion, heat deformation or the like occurs in the stator or the storage portion like shrink fitting. Therefore, the accuracy of the coaxiality, roundness, etc. can be improved and the reliability as a product can be enhanced.

  DESCRIPTION OF SYMBOLS 10 ... Electric oil pump, 12 ... Pump rotor 12, 14 ... Outer rotor, 16 ... Rotor part, 18 ... Stator part, 18C-U1-18C-U3, 18C-V1-18C-V3, 18C-W1-18C-W3 ... Bobbin portion, 18A-U1 to 18A-U3, 18A-V1 to 18A-V3, 18A-W1 to 18A-W3 ... Winding portion of each phase, 20 ... Housing, 22 ... Pump portion storage portion, 24 ... Motor portion storage Numerals 24, 28: Drive rotating shaft, 30: Bearing part 30, 42: Drive controller, 44: Housing, 46: Control board, 48: Cover, 52, 54: Crossover guide, 56: Intermediate insulating member, pressing member , 58A, 58B ... detents.

Claims (11)

A pump unit composed of a pump rotor and an outer rotor, an electric motor unit composed of a rotor unit and a stator unit, and a drive control unit that drives and controls the electric motor unit, and receives a drive signal from the drive control unit. In the electric oil pump for driving the pump rotor of the pump unit by rotating the rotor unit of the motor unit by supplying the winding wound around the stator unit,
The motor unit housing unit for housing the motor unit and the housing constituting the drive control unit are fixed so as to face each other, and the stator unit includes a plurality of U-phase winding units and a plurality of V-phase windings. A plurality of winding portions of the wire portion and the W phase, the plurality of winding portions of the same phase of each phase are connected by a jumper, and the stator portion is housed in the electric motor portion housing portion. An electric oil pump characterized in that an intermediate insulating member is disposed between a crossover and a side wall of the electric motor unit storage unit. The electric oil pump according to claim 1,
The connecting wire is stored in a guide storing groove formed in a connecting wire guide standing upright on the outer periphery of the stator unit, and the connecting wire stored in the connecting wire guide and the side wall of the motor unit storing unit An electric oil pump characterized in that the intermediate insulating member is disposed between the two. In the electric oil pump according to claim 1 or 2,
The casing is formed of a synthetic resin having insulating properties, and the intermediate portion extends from a part of the casing between the connecting wire stored in the connecting wire guide and the side wall of the electric motor unit storing portion. An electric oil pump characterized by extending an insulating member. The electric oil pump according to any one of claims 1 to 3,
The electric oil pump according to claim 1, wherein the intermediate insulating member is in contact with the stator portion so as to press the stator portion toward a bottom surface portion of the electric motor portion storage portion. The electric oil pump according to claim 4,
An electric oil pump characterized in that a rotation stop portion for restricting mutual rotation is provided between the stator portion and the motor portion storage portion. A pump unit composed of a pump rotor and an outer rotor, an electric motor unit composed of a rotor unit and a stator unit, and a drive control unit that drives and controls the electric motor unit, and receives a drive signal from the drive control unit. In the electric oil pump for driving the pump rotor of the pump unit by rotating the rotor unit of the motor unit by supplying the winding wound around the stator unit,
The crossover wire and the electric motor are fixed in a state where the electric motor unit accommodating unit accommodating the electric motor unit and the housing constituting the drive control unit are opposed to each other and the stator unit is accommodated in the electric motor unit accommodating unit. An electric oil pump characterized in that a pressing member is formed on the housing to pass between the side surface portion of the portion storage portion and press the stator portion toward the bottom surface portion of the electric motor portion storage portion. The electric oil pump according to claim 6, wherein
The casing is formed of a synthetic resin having insulating properties, and the pressing member extends from a part of the casing and presses the stator portion toward the bottom surface portion of the motor unit storage portion. Electric oil pump. The electric oil pump according to claim 7,
The stator portion includes a plurality of U-phase winding portions, a plurality of V-phase winding portions, and a plurality of W-phase winding portions, and the plurality of in-phase winding portions of each phase are crossover wires. The electric oil pump is characterized in that the pressing member is arranged between the connecting wire and a side surface portion of the electric motor unit storage unit in a state where the stator unit is arranged in the electric motor unit storage unit. . In the electric oil pump according to claim 8,
The connecting wire is stored in a guide storing groove formed in a connecting wire guide standing upright on the outer periphery of the stator unit, and the connecting wire stored in the connecting wire guide and a side surface portion of the motor unit storing unit. An electric oil pump having the pressing member disposed therebetween. The electric oil pump according to any one of claims 6 to 9,
An electric oil pump characterized in that a rotation stop portion for restricting mutual rotation is provided between the stator portion and the motor portion storage portion. The electric oil pump according to claim 10,
An electric oil pump characterized in that a rotation stop portion comprising a concave portion and a convex portion for restricting mutual rotation is provided between the stator portion and the electric motor portion storage portion.

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