CN116830430A - electric compressor - Google Patents

electric compressor Download PDF

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Publication number
CN116830430A
CN116830430A CN202280014113.XA CN202280014113A CN116830430A CN 116830430 A CN116830430 A CN 116830430A CN 202280014113 A CN202280014113 A CN 202280014113A CN 116830430 A CN116830430 A CN 116830430A
Authority
CN
China
Prior art keywords
circuit board
housing
positioning pin
projection
shaft portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202280014113.XA
Other languages
Chinese (zh)
Inventor
岛田贤
本田和也
稻津海
武藤圭史朗
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Industries Corp
Original Assignee
Toyota Industries Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyota Industries Corp filed Critical Toyota Industries Corp
Publication of CN116830430A publication Critical patent/CN116830430A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/121—Casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/008—Hermetic pumps
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30—Structural association with control circuits or drive circuits
    • H02K11/33—Drive circuits, e.g. power electronics
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • H02K5/225—Terminal boxes or connection arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F04C2240/803—Electric connectors or cables; Fittings therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F04C2240/808—Electronic circuits (e.g. inverters) installed inside the machine
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2211/00—Specific aspects not provided for in the other groups of this subclass relating to measuring or protective devices or electric components
    • H02K2211/03—Machines characterised by circuit boards, e.g. pcb

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Compressor (AREA)
  • Motor Or Generator Frames (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

The housing (50) is provided with: a terminal housing part for housing the terminal insertion part (42); a 1 st positioning pin (60) for positioning with respect to the circuit board (31); and a 1 st claw part which is locked on the circuit substrate (31). The circuit board (31) is provided with a connection hole (34) into which the board connection part (43) is inserted, and a 1 st positioning hole (35) into which the 1 st positioning pin (60) is inserted. The opening (32) is disposed between the connection hole (34) and the 1 st positioning hole (35). The 1 st claw part is locked in the 1 st positioning hole (35). The 1 st positioning pin (60) restricts the movement of the bus bar assembly (40) along the 2 nd surface (31 b) of the circuit board (31), and the 1 st claw restricts the movement of the bus bar assembly (40) in a direction perpendicular to the 2 nd surface (31 b) of the circuit board (31).

Description

Electric compressor
Technical Field
The present invention relates to an electric compressor.
Background
The motor-driven compressor described in patent document 1 includes: a compression portion that compresses a fluid; an electric motor that drives the compression section; an inverter device that drives an electric motor; a housing; and an airtight terminal. The inverter device includes a circuit board and a bus bar assembly mounted on the circuit board. The bus bar assembly includes a bus bar and a housing accommodating the bus bar.
Prior art literature
Patent literature
Patent document 1: japanese patent application laid-open No. 2015-178806
Disclosure of Invention
Problems to be solved by the invention
The bus bar assembly may be offset with respect to the circuit substrate due to an impact of vibration or the like of the motor-driven compressor. Such a shift may cause poor connection between the busbar assembly and the circuit board.
Means for solving the problems
An electric compressor for solving the above problems includes: a compression portion that compresses a fluid; an electric motor that drives the compression section; an airtight terminal connected with the electric motor; an inverter device that supplies electric power to the electric motor via the airtight terminal; and a housing having a motor housing chamber for housing the electric motor, the housing having an inverter housing chamber that is partitioned from the motor housing chamber and houses the inverter device, the inverter device comprising: a circuit board having an opening; and a bus bar assembly mounted on the circuit board, the bus bar assembly including a bus bar and a housing accommodating the bus bar, the bus bar including: a substrate connection portion electrically connected to the circuit substrate; and a terminal insertion portion into which the airtight terminal is inserted through the opening, the housing including: a terminal housing portion that houses the terminal insertion portion; a positioning pin that performs positioning with respect to the circuit board; and a claw portion that is engaged with the circuit board, the circuit board including: a connection hole into which the substrate connection part is inserted; and a positioning hole into which the positioning pin is inserted, wherein the opening is disposed between the connecting hole and the positioning hole, and the claw is locked to the opening or the positioning hole.
Thus, the 1 st positioning pin interferes with the 1 st positioning hole when the bus bar assembly moves along the circuit substrate. When the bus bar assembly moves in a direction perpendicular to the circuit board, the claw portion is engaged with the opening or the 1 st positioning hole. This suppresses the displacement of the bus bar assembly with respect to the circuit board.
In the above-described motor-driven compressor, the positioning pin may include a 1 st projection and a 2 nd projection spaced apart from the 1 st projection, the 1 st projection may include a 1 st shaft portion extending toward the circuit board, and the 2 nd projection may include: a 2 nd shaft portion elastically deformable in a deformation direction from the 1 st projection toward the 2 nd projection and extending toward the circuit substrate; and the claw portion is connected to the 2 nd shaft portion, and the claw portion is engaged with the positioning hole, wherein a cross-sectional area of the 1 st shaft portion in a plane perpendicular to a direction in which the 1 st shaft portion extends is larger than a cross-sectional area of the 2 nd shaft portion in a plane perpendicular to a direction in which the 2 nd shaft portion extends.
Thus, the 1 st shaft portion is less likely to deform in the deformation direction than the 2 nd shaft portion. Therefore, the 1 st shaft portion of the positioning pin interferes with the positioning hole, so that the bus bar assembly can be prevented from being displaced relative to the circuit board.
In the above-described motor-driven compressor, when the positioning pin is the 1 st positioning pin and the positioning hole is the 1 st positioning hole, the bus bar assembly may include a 2 nd positioning pin for positioning with respect to the circuit board, the circuit board may include a 2 nd positioning hole into which the 2 nd positioning pin is inserted, and the 2 nd positioning hole may be disposed between the connection hole and the opening.
Thus, when the bus bar assembly is about to rotate with respect to the circuit board about the 1 st positioning pin due to vibration of the motor-driven compressor or the like, the rotation is restricted by the 2 nd positioning pin. Therefore, the displacement of the bus bar assembly with respect to the circuit substrate in the rotational direction can be suppressed.
In the above-described motor-driven compressor, the 2 nd positioning pin may be disposed so as to be separated from the 1 st positioning pin in the deformation direction.
Thus, when the bus bar assembly is about to rotate about the 2 nd positioning pin with respect to the circuit substrate, the 1 st projection of the 1 st positioning pin interferes with the 1 st positioning hole. This can restrain the bus bar assembly from rotating about the 2 nd positioning pin with respect to the circuit board.
In the above-described motor-driven compressor, when the claw portion is the 1 st claw portion and the deformation direction is the 1 st deformation direction, the 2 nd positioning pin may include a 3 rd projection and a 4 th projection spaced apart from the 3 rd projection, the 3 rd projection may include a 3 rd shaft portion extending toward the circuit board, and the 4 th projection may include: a 4 th shaft portion elastically deformable in a 2 nd deformation direction from the 3 rd projection toward the 4 th projection and extending toward the circuit substrate; and a 2 nd claw portion connected to the 4 rd shaft portion and engaged with the circuit board, wherein a cross-sectional area of the 3 rd shaft portion in a plane perpendicular to a direction in which the 3 rd shaft portion extends is larger than a cross-sectional area of the 4 th shaft portion in a plane perpendicular to a direction in which the 4 th shaft portion extends, and the 1 st projection and the 3 rd projection are opposed to each other, or the 2 nd projection and the 4 th projection are opposed to each other.
Thus, the 1 st claw portion of the 1 st positioning pin and the 2 nd claw portion of the 2 nd positioning pin restrict movement of the bus bar assembly in the thickness direction of the circuit substrate. The 3 rd projection of the 2 nd positioning pin interferes with the 2 nd positioning hole with respect to the offset in the direction in which the 2 nd projection of the 1 st positioning pin is deformed. The 1 st projection of the 1 st positioning pin interferes with the 1 st positioning hole with respect to the offset in the direction in which the 4 th projection of the 2 nd positioning pin is deformed. Therefore, the displacement of the bus bar assembly can be further suppressed.
In the above-described electric compressor, the bus bar may include a plate-shaped connecting portion that connects the substrate connecting portion and the terminal insertion portion, and the housing may include: a receiving groove that receives the connecting portion; and a support portion that supports the connection portion by protruding from an inner side surface of the accommodation groove in a width direction of the accommodation groove.
Thus, the support portion supports the connecting portion from the width direction of the accommodating groove, and movement of the bus bar in the housing can be restricted. Therefore, the offset between the bus bar and the housing can be suppressed.
In the above-described motor-driven compressor, the opening may be opened with respect to an outer peripheral edge of the circuit board.
Thus, the opening can be easily provided in the circuit board. Therefore, the inverter device of the electric compressor can be easily manufactured.
Effects of the invention
According to the present invention, poor connection between the bus bar assembly and the circuit board can be suppressed.
Drawings
Fig. 1 is a cross-sectional view showing an outline of the configuration of an electric compressor.
Fig. 2 is an exploded perspective view showing the configuration of the circuit board and the bus bar assembly.
Fig. 3 is a perspective view of a busbar assembly mounted to a circuit substrate.
Fig. 4 is a plan view of the circuit board and the bus bar assembly when viewed from the thickness direction of the circuit board.
Fig. 5 is a perspective view of a busbar assembly.
Fig. 6 is a plan view of the busbar assembly as viewed from the installation surface.
Fig. 7 is a perspective view of the 1 st or 2 nd positioning pin.
Fig. 8 is a plan view of the 1 st positioning pin or the 2 nd positioning pin as seen from the installation surface.
Fig. 9 is a cross-sectional view of the 1 st positioning pin or the 2 nd positioning pin in the 1 st surface of the circuit substrate.
FIG. 10 is a 10-10 cross-sectional view of the 1 st dowel of FIG. 4.
Fig. 11 is a side view of the circuit board and the bus bar assembly as viewed from a direction perpendicular to the 1 st deformation direction, (a) is a view showing a case where the bus bar assembly is not offset from the circuit board, and (b) is a view showing a case where the 1 st nail portion interferes with the circuit board.
Fig. 12 is a side view of the circuit board and the bus bar assembly as seen from a direction perpendicular to the 1 st deformation direction in the case where the opening is not provided as a comparative example, (a) is a view showing a case where the bus bar assembly is not offset from the circuit board, and (b) is a view showing a case where the 1 st nail portion interferes with the circuit board.
Fig. 13 is a diagram showing a modification of the bus bar assembly.
Fig. 14 is a diagram showing a modification of the bus bar assembly.
Detailed Description
< constitution >
An embodiment of the motor-driven compressor will be described below. The electric compressor of the present embodiment is used for, for example, a vehicle air conditioner.
As shown in fig. 1, the electric compressor 10 includes a housing 11, a compression unit 20 that compresses a refrigerant that is a fluid, a rotary shaft 21, an electric motor 22, an airtight terminal 23, and an inverter device 30.
The housing 11 includes a motor housing 12, a discharge housing 13, and an inverter case 14. The motor case 12, the discharge case 13, and the inverter case 14 are made of metal such as aluminum.
The motor housing 12 includes a flat bottom wall 12a, a peripheral wall 12b, a housing hole 12c, a suction port 12d, and a boss 12e.
The peripheral wall 12b extends cylindrically from the outer peripheral edge of the bottom wall 12 a. The 1 st end of the peripheral wall 12b is closed by a bottom wall 12a, and the 2 nd end of the peripheral wall 12b is open.
The case hole 12c penetrates the bottom wall 12a in the thickness direction thereof.
The suction port 12d is a through hole provided in the peripheral wall 12 b. The suction port 12d is connected to a refrigerant circuit not shown.
The boss 12e extends from the bottom wall 12a in a direction opposite to the peripheral wall 12 b. The boss 12e is provided with a screw hole into which the bolt B is inserted.
The discharge housing 13 closes the opening of the peripheral wall 12b of the motor housing 12. Thus, the motor housing 12 and the discharge housing 13 form a motor housing chamber V1. Therefore, the housing 11 includes a motor housing chamber V1. The discharge housing 13 includes a discharge port 13a. The discharge port 13a is connected to a refrigerant circuit not shown.
The inverter case 14 is mounted to the boss 12e of the motor housing 12. Thus, the motor housing 12 and the inverter case 14 form an inverter housing chamber V2. Therefore, the housing 11 includes the inverter housing chamber V2. The inverter housing chamber V2 is partitioned from the motor housing chamber V1 by a bottom wall 12 a. The inverter housing chamber V2 is continuous with the motor housing chamber V1 via the housing hole 12 c.
The electric motor 22 is supplied with electric power to drive the compression unit 20 and the rotary shaft 21. Specifically, the electric motor 22 rotates the compression unit 20 and the rotary shaft 21. By this rotation, the refrigerant supplied from the refrigerant circuit is sucked from the suction port 12 d. The sucked refrigerant is compressed by the compressing portion 20. The compressed refrigerant is discharged from the discharge port 13a to the outside of the casing 11.
The airtight terminal 23 is inserted into the case hole 12c. The airtight terminal 23 is a terminal that maintains the airtight seal between the motor housing V1 and the inverter housing V2. The airtight terminal 23 includes three conductive members 24 connected to the electric motor 22. A part of each conductive member 24 protrudes into the inverter housing chamber V2.
As shown in fig. 1, inverter device 30 is accommodated in inverter accommodation chamber V2. Inverter device 30 is a power conversion device that supplies electric power to electric motor 22 via airtight terminal 23. The inverter device 30 is fastened to the boss 12e by a bolt B. The inverter device 30 includes a circuit board 31 and a bus bar assembly 40.
As shown in fig. 1 and 2, the circuit board 31 includes the inverter circuit element I, the 1 st surface 31a, the 2 nd surface 31b, the outer edge portion 31c, the opening 32, two board fastening holes 33a and 33b, three connection holes 34, the 1 st positioning hole 35, and the 2 nd positioning hole 36.
The inverter circuit element I converts electric power from an external power source, not shown, into ac electric power.
The opening 32, the two board fastening holes 33a and 33b, the connection hole 34, the 1 st positioning hole 35, and the 2 nd positioning hole 36 penetrate the circuit board 31 in the thickness direction of the circuit board 31. The shapes of the two substrate fastening connection holes 33a, 33b, the connection hole 34, and the two positioning holes 35, 36 are arbitrary, for example, circular.
As shown in fig. 1, the 1 st surface 31a is opposed to the bottom wall 12a of the motor housing 12.
The 2 nd surface 31b is located on the opposite side of the 1 st surface 31a in the thickness direction of the circuit substrate 31.
As shown in fig. 2, the outer edge 31c is one of linear edges of the outer periphery of the circuit board 31.
The opening 32 is opened with respect to the outer edge 31c of the circuit board 31. The opening 32 includes a 1 st side portion 32a, a 2 nd side portion 32b, and a 3 rd side portion 32c.
The 1 st side portion 32a and the 2 nd side portion 32b are connected to the outer edge portion 31 c. The 1 st side portion 32a and the 2 nd side portion 32b are separated in a direction in which the outer edge portion 31c extends.
The 3 rd side portion 32c connects the 1 st side portion 32a with the 2 nd side portion 32 b.
The 1 st side portion 32a, the 2 nd side portion 32b, and the 3 rd side portion 32c define an opening 32d.
The two substrate fastening connection holes 33a, 33B are holes for inserting the bolts B, respectively. The distance from the 1 st substrate fastening hole 33a to the 2 nd side portion 32b is shorter than the distance from the 1 st substrate fastening hole 33a to the 1 st side portion 32a in the direction along the 1 st surface 31a of the circuit substrate 31. In the direction along the 1 st surface 31a of the circuit board 31, the distance from the 1 st board fastening hole 33a to the 3 rd side portion 32c is shorter than the distance from the 1 st board fastening hole 33a to the outer edge portion 31 c.
The distance from the 2 nd substrate fastening hole 33b to the 1 st side portion 32a is shorter than the distance from the 2 nd substrate fastening hole 33b to the 2 nd side portion 32b in the direction along the 1 st surface 31a of the circuit substrate 31. In the direction along the 1 st surface 31a of the circuit board 31, the distance from the 2 nd board fastening hole 33b to the 3 rd side portion 32c is longer than the distance from the 2 nd board fastening hole 33b to the outer edge portion 31 c.
The connection hole 34 is provided at a position apart from the 1 st side portion 32a in a direction from the 2 nd side portion 32b toward the 1 st side portion 32 a. The distance from the connection hole 34 to the 1 st side portion 32a is shorter than the distance from the connection hole 34 to the 2 nd side portion 32b in the direction along the 1 st surface 31a of the circuit substrate 31. The distance from the connection hole 34 to the 1 st side portion 32a is shorter than the distance from the 2 nd substrate fastening connection hole 33b to the 2 nd side portion 32b in the direction along the 1 st surface 31a of the circuit substrate 31.
The 1 st positioning hole 35 is provided at a position apart from the 2 nd side portion 32b in a direction from the 1 st side portion 32a toward the 2 nd side portion 32 b. The opening 32 is disposed between the connection hole 34 and the 1 st positioning hole 35.
The 2 nd positioning hole 36 is provided at a position apart from the 1 st side portion 32a in a direction from the 2 nd side portion 32b toward the 1 st side portion 32 a. The 2 nd positioning hole 36 is disposed between the connection hole 34 and the opening 32. The 1 st positioning hole 35, the opening 32, the 2 nd positioning hole 36, and the connection hole 34 are arranged in this order in a direction from the 2 nd side portion 32b toward the 1 st side portion 32 a. The distance from the 2 nd positioning hole 36 to the 1 st side portion 32a is shorter than the distance from the 2 nd positioning hole 36 to the 2 nd side portion 32b in the direction along the 1 st surface 31a of the circuit substrate 31. In the direction along the 1 st surface 31a of the circuit board 31, the distance from the 2 nd positioning hole 36 to the 1 st side 32a is shorter than the distance from the connection hole 34 to the 1 st side 32 a. The distance from the 2 nd positioning hole 36 to the outer edge portion 31c is shorter than the distance from the connection hole 34 to the 3 rd edge portion 32c in the direction along the 1 st surface 31a of the circuit substrate 31.
As shown in fig. 2 to 5, the bus bar assembly 40 is a connector that connects the airtight terminal 23 and the circuit board 31. As shown in fig. 2 and 3, the bus bar assembly 40 is mounted on the 2 nd surface 31b of the circuit board 31. The bus bar assembly 40 includes 3 bus bars 41 and a housing 50.
The 3 bus bars 41 are conductive members for transmitting electric power from the circuit board 31 to the airtight terminal 23. Each bus bar 41 includes a terminal insertion portion 42, a board connection portion 43, and a plate-like connection portion 44.
The terminal insertion portion 42 is a cylindrical terminal into which the conductive member 24 of the hermetic terminal 23 can be inserted. The conductive members 24 of the airtight terminal 23 are inserted into the terminal insertion portions 42 one by one through the openings 32d defined by the opening 32.
The board connection portion 43 is a protrusion extending in a direction from the 2 nd surface 31b toward the 1 st surface 31a of the circuit board 31. The substrate connection portion 43 is inserted into the connection hole 34. Therefore, the connection hole 34 is a hole into which the substrate connection portion 43 is inserted. A part of the board connection portion 43 protrudes from the 1 st surface 31a in the thickness direction of the circuit board 31. The part of the board connection portion 43 is connected to the circuit board 31 by soldering or the like using the solder S. Thereby, the board connection portion 43 is electrically connected to the circuit board 31.
The connection portion 44 connects the terminal insertion portion 42 and the board connection portion 43. In the present embodiment, the connecting portion 44 extends linearly between the terminal insertion portion 42 and the board connecting portion 43. The thickness direction of the connecting portion 44 is perpendicular to the thickness direction of the circuit board 31.
As shown in fig. 2 to 6, the case 50 is an insulating member that accommodates the bus bar 41. The case 50 of the present embodiment is a rectangular parallelepiped resin member.
As shown in fig. 6, the case 50 has a rectangular shape when viewed from the thickness direction of the circuit board 31. The long side of the case 50 in a plan view from the thickness direction of the circuit board 31 may be simply referred to as "long side of the case 50". Similarly, the short side of the case 50 in plan view from the thickness direction of the circuit board 31 may be simply referred to as "short side of the case 50".
In the present embodiment, the direction in which the long side of the housing 50 extends coincides with the direction in which the outer edge portion 31c extends. The direction in which the long side of the housing 50 extends coincides with the direction in which the connecting portion 44 extends.
As shown in fig. 2, the housing 50 includes a mounting surface 50a, an opposing surface 50b, a 1 st long side surface 50c, a 2 nd long side surface 50d, a 1 st short side surface 50e, a 2 nd short side surface 50f, a busbar housing 51, two holder fastening holes 55a, 55b, a 1 st positioning pin 60, and a 2 nd positioning pin 70.
The mounting surface 50a faces the 2 nd surface 31b of the circuit board 31. The setting surface 50a is parallel to the 2 nd surface 31 b. A part of the setting surface 50a faces the opening 32.
The opposing surface 50b is located on the opposite side of the disposing surface 50a in the thickness direction of the case 50. In the following description, a direction from the installation surface 50a toward the opposing surface 50b is sometimes referred to as "a thickness direction of the case 50". The thickness direction of the case 50 coincides with the thickness direction of the circuit board 31.
The 1 st long side surface 50c and the 2 nd long side surface 50d are surfaces constituting the long side of the case 50 when viewed from the thickness direction of the circuit board 31. The 1 st long side surface 50c and the 2 nd long side surface 50d connect the installation surface 50a and the opposing surface 50b, respectively. The 1 st long side surface 50c and the 2 nd long side surface 50d are located on opposite sides of the case 50 in the short side direction of the case 50. In the direction along the installation surface 50a, the distance between the outer edge portion 31c of the circuit board 31 and the 1 st long side surface 50c of the case 50 is shorter than the distance between the outer edge portion 31c of the circuit board 31 and the 2 nd long side surface 50d of the case 50.
The 1 st short side surface 50e and the 2 nd short side surface 50f are surfaces constituting short sides of the case 50 when viewed from the thickness direction of the circuit board 31. The 1 st short side surface 50e and the 2 nd short side surface 50f connect the installation surface 50a and the opposing surface 50b, respectively. The 1 st short side surface 50e and the 2 nd short side surface 50f connect the 1 st long side surface 50c and the 2 nd long side surface 50d, respectively. The 1 st short side surface 50e and the 2 nd short side surface 50f are located on opposite sides of the housing 50 in the short side direction of the housing 50. In the direction along the arrangement surface 50a, the distance from the 1 st short side surface 50e to the 1 st side portion 32a of the circuit board 31 is shorter than the distance from the 2 nd short side surface 50f to the 1 st side portion 32a of the circuit board 31. In the direction along the arrangement surface 50a, the distance from the 2 nd short side surface 50f to the 2 nd side portion 32b of the circuit substrate 31 is shorter than the distance from the 1 st short side surface 50e to the 2 nd side portion 32b of the circuit substrate 31.
As shown in fig. 5 and 6, the bus bar housing 51 is a recess for housing the bus bar 41. The number of the bus bar housing portions 51 is equal to the number of the bus bars 41, and is 3. Each busbar accommodating portion 51 accommodates 1 busbar 41. Each busbar accommodating portion 51 is connected to the mounting surface 50a and extends in the longitudinal direction of the housing 50. In other words, the longitudinal direction of the housing 50 refers to the direction in which the bus bar accommodation portion 51 extends. The 3 bus bar housing portions 51 are arranged in the short side direction of the case 50. In other words, the short side direction of the case 50 refers to the arrangement direction of the busbar accommodating portions 51. The busbar housing 51 includes a terminal housing 52, a housing groove 53, and a pair of support portions 54.
The terminal housing portion 52 is a recess portion that houses the terminal insertion portion 42. The terminal housing 52 includes a housing peripheral wall 52a and a housing bottom wall 52b.
The housing portion peripheral wall 52a is a cylindrical peripheral wall. The 1 st end of the housing portion peripheral wall 52a is connected to the installation surface 50 a. The 1 st end of the housing peripheral wall 52a defines an opening in the installation surface 50 a. The opening of the housing portion peripheral wall 52a is rectangular. The opening of the housing portion peripheral wall 52a has a longitudinal direction that matches the longitudinal direction of the housing 50. The opening of the housing peripheral wall 52a has a short side direction aligned with the short side direction of the case 50.
The housing bottom wall 52b closes the 2 nd end of the housing peripheral wall 52a. The 2 nd end of the housing portion peripheral wall 52a is an end opposite to the 1 st end of the housing portion peripheral wall 52a.
As shown in fig. 4, the terminal housing portion 52 faces the opening portion 32. With this, the terminal insertion portion 42 accommodated in the terminal accommodating portion 52 faces the opening 32. The airtight terminal 23 is inserted into the terminal insertion portion 42 through the opening 32d of the opening 32.
The receiving groove 53 is a recess for receiving the connecting portion 44. The receiving groove 53 has a square U-shape. The accommodation groove 53 is connected to the installation surface 50a, and extends linearly from the 1 st short side surface 50e of the case 50 to the accommodation portion peripheral wall 52a. The accommodating groove 53 is deep in a direction perpendicular to the installation surface 50 a.
The housing groove 53 has two inner side surfaces 53a. The inner surface 53a is a peripheral surface connected to the installation surface 50 a. The two inner side surfaces 53a are connected by a wall portion of the housing 50 forming the opposing surface 50 b. The inner side surfaces 53a face each other in the short side direction of the case 50. The width of the receiving groove 53, that is, the interval between the opposing inner sides 53a is wider than the thickness of the connecting portion 44. Accordingly, the receiving groove 53 has a gap in the width direction of the receiving groove 53 with respect to the connecting portion 44.
As shown in fig. 4 and 5, the pair of support portions 54 protrude from different inner side surfaces 53a in the width direction of the accommodating groove 53. The support portions 54 extend perpendicularly from the inner side surfaces 53a, respectively. The pair of support portions 54 are opposed to each other. Therefore, the width-direction gap of the receiving groove 53 becomes smaller at the position where the support portion 54 is provided. Thus, the pair of support portions 54 support the coupling portion 44. In the present embodiment, the distance from the housing peripheral wall 52a to the support 54 is longer than the distance from the 1 st short side surface 50e of the case 50 to the support 54 in the direction in which the busbar housing 51 extends. The position of the support portion 54 provided on the inner surface 53a of the housing groove 53 is arbitrary.
Each of the 3 busbar housing portions 51 configured in this manner houses 1 busbar 41. In the following description, the busbar housing portion 51 is sometimes referred to as a 1 st busbar housing portion 51a, a 2 nd busbar housing portion 51b, and a 3 rd busbar housing portion 51c, respectively, in the order of arrangement in the direction from the 1 st long side surface 50c toward the 2 nd long side surface 50 d.
The two holder fastening holes 55a, 55B are through holes into which the bolts B are inserted. The two holder fastening holes 55a and 55b penetrate from the installation surface 50a to the facing surface 50b, respectively.
As shown in fig. 4, when the 1 st surface 31a of the circuit board 31 is viewed in plan, the 1 st holder fastening hole 55a overlaps with the 1 st board fastening hole 33 a. When the 1 st surface 31a of the circuit board 31 is viewed in plan, the 2 nd holder fastening hole 55b overlaps the 2 nd board fastening hole 33 b. The circuit board 31 and the bus bar assembly 40 are fastened to the motor case 12 by fastening the bolts B inserted into the two board fastening holes 33a and 33B and the two holder fastening holes 55a and 55B to the screw holes of the boss 12 e.
As shown in fig. 3 to 5, the 1 st positioning pin 60 is a protrusion for positioning with respect to the circuit board 31. As shown in fig. 3, the 1 st positioning pin 60 is inserted into the 1 st positioning hole 35. Thus, the 1 st positioning hole 35 is a hole into which the 1 st positioning pin 60 is inserted. Further, a predetermined gap is provided between the 1 st positioning pin 60 and the 1 st positioning hole 35.
The 1 st positioning pin 60 extends from the installation surface 50a in a direction perpendicular to the installation surface 50 a. The distance between the 1 st positioning pin 60 and the 2 nd short side surface 50f is shorter than the distance between the 1 st positioning pin 60 and the 1 st short side surface 50 e. The distance between the 1 st positioning pin 60 and the 2 nd long side surface 50d is shorter than the distance between the 1 st positioning pin 60 and the 1 st long side surface 50 c.
As shown in fig. 5 to 10, the 1 st positioning pin 60 includes a 1 st projection 61 and a 2 nd projection 63.
As shown in fig. 5 and 6, the 1 st projection 61 extends from the mounting surface 50a of the housing 50 toward the circuit board 31.
As shown in fig. 7 to 10, the 1 st projection 61 includes a 1 st shaft portion 62.
As shown in fig. 7, the 1 st shaft 62 is a columnar protrusion connected to the installation surface 50a of the housing 50.
As shown in fig. 7 and 9, the 1 st shaft 62 has a semicircular shape when the housing 50 is viewed from the installation surface 50 a. The 1 st shaft portion 62 includes a 1 st curved peripheral surface 62a and a 1 st flat peripheral surface 62b.
As shown in fig. 9, the 1 st curved peripheral surface 62a forms an arc of the 1 st shaft 62 when the housing 50 is viewed from the installation surface 50 a.
The 1 st flat peripheral surface 62b forms a chord of the 1 st shaft 62 when the housing 50 is viewed from the installation surface 50 a.
As shown in fig. 5 and 6, the 2 nd protrusion 63 extends from the mounting surface 50a of the housing 50 toward the circuit board 31. The 2 nd projection 63 is separated from the 1 st projection 61. Hereinafter, the direction from the 1 st projection 61 toward the 2 nd projection 63 is sometimes referred to as a 1 st deformation direction D1 as a deformation direction. The 1 st deformation direction D1 is perpendicular to the thickness direction of the case 50.
As shown in fig. 7 to 10, the 2 nd protrusion 63 includes a 2 nd shaft portion 64 and a 1 st claw portion 65.
As shown in fig. 7, the 2 nd shaft portion 64 is a columnar protrusion connected to the installation surface 50 a. The 1 st shaft portion 62 extends from the installation surface 50a of the housing 50 toward the circuit board 31. The 2 nd shaft portion 64 is elastically deformable in the 1 st deformation direction D1.
As shown in fig. 7 and 9, the circumferential surface of the 2 nd shaft portion 64 includes a 2 nd curved circumferential surface 64a and a 2 nd flat circumferential surface 64b.
As shown in fig. 9, the 2 nd curved peripheral surface 64a forms an arc of the 2 nd shaft portion 64 when the housing 50 is viewed from the installation surface 50 a.
The 2 nd flat peripheral surface 64b forms a chord of the 2 nd shaft portion 64 when the housing 50 is viewed from the installation surface 50 a. The 2 nd flat peripheral surface 64b is opposed to the 1 st flat peripheral surface 62b in the 1 st deformation direction D1.
As shown in fig. 9, the cross-sectional area of the 1 st shaft portion 62 in the plane perpendicular to the direction in which the 1 st shaft portion 62 extends is larger than the cross-sectional area of the 2 nd shaft portion 64 in the plane perpendicular to the direction in which the 2 nd shaft portion 64 extends. The maximum thickness of the 1 st shaft portion 62 in the 1 st deformation direction D1 is longer than the maximum thickness of the 2 nd shaft portion 64 in the 1 st deformation direction D1. Therefore, the 1 st projection 61 is a projection which is less likely to be deformed in the 1 st deformation direction D1 than the 2 nd projection 63.
As shown in fig. 10, the length of the 2 nd shaft portion 64 in the thickness direction of the case 50 is longer than the thickness of the circuit substrate 31 by a predetermined gap distance d. In other words, the 2 nd shaft portion 64 protrudes from the 1 st positioning hole 35 by the gap distance d.
As shown in fig. 7, 8 and 10, the 1 st claw portion 65 is a protrusion that is engaged with the circuit board 31. The 1 st claw portion 65 is connected to the 2 nd shaft portion 64. In the present embodiment, the 1 st claw portion 65 has a semicircular shape, and the bottom surface of the 1 st claw portion 65 is connected to the tip end of the 2 nd shaft portion 64. Further, the corners of the 1 st claw portion 65 are chamfered. The 1 st claw portion 65 includes a 1 st end surface 65a, a 1 st step surface 65b, and a 1 st inclined surface 65c.
The 1 st end face 65a is a plane continuous with the 2 nd flat peripheral surface 64 b. The 1 st end face 65a is disposed coplanar with the 2 nd flat peripheral face 64 b. The 1 st end face 65a faces the 1 st flat peripheral surface 62b in the 1 st deformation direction D1. The 1 st end surface 65a and the 1 st flat peripheral surface 62b define a 1 st groove 60a in the 1 st positioning pin 60. The 1 st groove 60a extends perpendicularly to the 1 st deformation direction D1.
The 1 st step surface 65b is a surface protruding from the 2 nd curved circumferential surface 64a at least in the 1 st deformation direction D1. In the present embodiment, the 1 st step surface 65b corresponds to the bottom surface of the 1 st claw portion 65. The 1 st step surface 65b is connected to the 2 nd curved peripheral surface 64 a. The 1 st step surface 65b is opposed to the disposition surface 50a in parallel in the thickness direction of the housing 50. The 1 st nail portion 65 is locked to the 1 st positioning hole 35 of the circuit board 31 at the 1 st step surface 65 b. The "1 st claw portion 65 is locked to the 1 st positioning hole 35" means that the 1 st claw portion 65 is locked to the peripheral edge of the opening end of the 1 st positioning hole 35 in a state where the 1 st claw portion 65 is inserted so as to penetrate the 1 st positioning hole 35. In the present embodiment, the peripheral edge of the opening end of the 1 st positioning hole 35 is included in the 1 st surface 31a.
The 1 st inclined surface 65c is an inclined surface connected to the outer peripheral edge of the 1 st step surface 65 b. The 1 st inclined surface 65c becomes shorter in the 1 st deformation direction D1 as it is separated from the 1 st step surface 65b in the direction in which the 2 nd shaft portion 64 extends, and the maximum distance between the 1 st end surface 65a becomes shorter. In the present embodiment, the 1 st inclined surface 65c corresponds to a curved surface of the side surface of the 1 st claw portion 65. The 1 st inclined surface 65c expands from the tip end of the 1 st end surface 65a toward the 2 nd curved peripheral surface 64 a. Further, a chamfered peripheral surface is provided between the 1 st step surface 65b and the 1 st inclined surface 65 c.
As shown in fig. 3 to 5, the 2 nd positioning pin 70 is a protrusion for positioning with respect to the circuit board 31. As shown in fig. 3, the 2 nd positioning pin 70 is inserted into the 2 nd positioning hole 36. Thus, the 2 nd positioning hole 36 is a hole into which the 2 nd positioning pin 70 is inserted. Further, a predetermined gap is provided between the 2 nd positioning pin 70 and the 2 nd positioning hole 36.
The 2 nd positioning pin 70 extends perpendicularly from the setting surface 50 a. The distance between the 2 nd positioning pin 70 and the 2 nd short side surface 50f is longer than the distance between the 2 nd positioning pin 70 and the 1 st short side surface 50 e. The distance between the 2 nd positioning pin 70 and the 1 st long side surface 50c is shorter than the distance between the 2 nd positioning pin 70 and the 2 nd long side surface 50 d.
As shown in fig. 6, the 2 nd positioning pin 70 is disposed apart from the 1 st positioning pin 60 in the 1 st deformation direction D1. In the present embodiment, the 2 nd positioning pin 70 is disposed between the accommodating groove 53 of the 1 st bus bar accommodating portion 51a and the accommodating groove 53 of the 2 nd bus bar accommodating portion 51 b.
As shown in fig. 5 to 9, the 2 nd positioning pin 70 of the present embodiment has the same shape as the 1 st positioning pin 60. The 2 nd positioning pin 70 includes a 3 rd projection 71 and a 4 th projection 73.
As shown in fig. 5 and 6, the 3 rd projection 71 extends from the mounting surface 50a of the housing 50 toward the circuit board 31.
As shown in fig. 7 to 9, the 3 rd projection 71 includes a 3 rd shaft portion 72.
As shown in fig. 7, the 3 rd shaft portion 72 is a columnar protrusion connected to the installation surface 50a of the housing 50.
As shown in fig. 8 and 9, the 3 rd shaft portion 72 has a semicircular shape when the housing 50 is viewed from the installation surface 50 a. The circumferential surface of the 3 rd shaft portion 72 includes a 3 rd curved circumferential surface 72a and a 3 rd flat circumferential surface 72b.
As shown in fig. 8, the 3 rd curved peripheral surface 72a forms an arc of the 3 rd shaft portion 72 when the housing 50 is viewed from the installation surface 50 a.
The 3 rd flat peripheral surface 72b forms a chord of the 3 rd shaft portion 72 when the housing 50 is viewed from the installation surface 50 a.
As shown in fig. 5 and 6, the 4 th projection 73 extends from the mounting surface 50a of the housing 50 toward the circuit board 31. The 4 rd projection 73 is separated from the 3 rd projection 71. Hereinafter, the direction from the 3 rd projection 71 toward the 4 th projection 73 is sometimes referred to as a 2 nd deformation direction D2. The 2 nd deformation direction D2 is perpendicular to the thickness direction of the case 50. In the present embodiment, the 2 nd deformation direction D2 is antiparallel to the 1 st deformation direction D1. The 4 th projection 73 is elastically deformable in the 2 nd deformation direction D2.
As shown in fig. 7 to 9, the 4 th protrusion 73 includes a 4 th shaft portion 74 and a 2 nd claw portion 75.
The 4 th shaft portion 74 is a columnar protrusion connected to the installation surface 50 a. The 3 rd shaft portion 72 extends from the housing 50 toward the circuit substrate 31. The 4 th shaft portion 74 is elastically deformable in the 2 nd deformation direction D2.
As shown in fig. 7 to 9, the peripheral surface of the 4 th shaft portion 74 includes a 4 th curved peripheral surface 74a and a 4 th flat peripheral surface 74b.
As shown in fig. 7 and 9, the 4 th curved peripheral surface 74a forms an arc of the 4 th shaft portion 74 when the housing 50 is viewed from the installation surface 50 a.
The 4 th flat peripheral surface 74b forms a chord of the 4 th shaft portion 74 when the housing 50 is viewed from the installation surface 50 a. The 4 th flat peripheral surface 74b is opposed to the 3 rd flat peripheral surface 72b in the 2 nd deforming direction D2.
As shown in fig. 9, the cross-sectional area of the 3 rd shaft portion 72 in the plane perpendicular to the direction in which the 3 rd shaft portion 72 extends is larger than the cross-sectional area of the 4 th shaft portion 74 in the plane perpendicular to the direction in which the 4 th shaft portion 74 extends. The maximum thickness of the 3 rd shaft portion 72 in the 2 nd deforming direction D2 is longer than the thickness of the 4 th shaft portion 74 in the 2 nd deforming direction D2. Therefore, the 3 rd projection 71 is a projection which is less likely to be deformed in the 2 nd deformation direction D2 than the 4 th shaft portion 74. The length of the 4 th shaft portion 74 in the thickness direction of the case 50 is longer than the thickness of the circuit board 31 by a predetermined gap distance d, similarly to the 2 nd shaft portion 64. In other words, the 4 th shaft portion 74 protrudes from the 2 nd positioning hole 36 by the gap distance d.
As shown in fig. 7 and 8, the 2 nd pawl 75 is a protrusion that is engaged with the circuit board 31. The 2 nd jaw portion 75 is connected to the 4 th shaft portion 74. In the present embodiment, the 2 nd claw portion 75 has a semicircular taper shape, and the bottom surface of the 2 nd claw portion 75 is connected to the tip end of the 4 th shaft portion 74. Further, the corners of the 2 nd claw portion 75 are chamfered. The 2 nd nail portion 75 includes a 2 nd end surface 75a, a 2 nd step surface 75b, and a 2 nd inclined surface 75c.
The 2 nd end surface 75a is a plane continuous with the 4 th flat peripheral surface 74 b. The 2 nd end surface 75a is disposed coplanar with the 4 th flat peripheral surface 74 b. The 2 nd end surface 75a is opposed to the 3 rd flat peripheral surface 72b in the 2 nd deforming direction D2. The 2 nd end surface 75a and the 3 rd flat peripheral surface 72b define a 2 nd groove 70a in the 2 nd positioning pin 70. The 2 nd groove 70a extends perpendicularly to the 2 nd deforming direction D2.
The 2 nd step surface 75b is a surface protruding from the 4 th curved circumferential surface 74a at least in the 2 nd deformation direction D2. In the present embodiment, the 2 nd step surface 75b corresponds to the bottom surface of the 2 nd claw portion 75. The 2 nd step surface 75b is connected to the 4 th curved peripheral surface 74 a. The 2 nd step surface 75b is opposed to the setting surface 50a in parallel in the thickness direction of the case 50. The 2 nd nail portion 75 is locked to the 2 nd positioning hole 36 of the circuit board 31 at the 2 nd step surface 75 b. The "2 nd nail portion 75 is locked to the 2 nd positioning hole 36" means that the 2 nd nail portion 75 is locked to the periphery of the opening end of the 2 nd positioning hole 36 in a state where the 2 nd nail portion 75 is inserted so as to penetrate the 2 nd positioning hole 36. In the present embodiment, the peripheral edge of the opening end of the 2 nd positioning hole 36 is included in the 1 st surface 31a.
The 2 nd inclined surface 75c is an inclined surface connected to the outer peripheral edge of the 2 nd step surface 75 b. The 2 nd inclined surface 75c becomes shorter in the maximum distance from the 2 nd end surface 75a in the 2 nd deforming direction D2 as it is separated from the 2 nd step surface 75b in the direction in which the 4 th shaft portion 74 extends. In the present embodiment, the 2 nd inclined surface 75c corresponds to a curved surface on the side surface of the 2 nd claw portion 75. The 2 nd inclined surface 75c expands from the tip end of the 2 nd end surface 75a toward the 4 th curved peripheral surface 74 a. Further, a chamfered peripheral surface is provided between the 2 nd step surface 75b and the 2 nd inclined surface 75 c.
As shown in fig. 6, the 2 nd positioning pin 70 is disposed opposite to the 1 st positioning pin 60 with respect to the 1 st projection 61 and the 3 rd projection 71. The 2 nd projection 63, the 1 st projection 61, the 3 rd projection 71, and the 4 th projection 73 are arranged in this order from the 2 nd short side surface 50f toward the 1 st deformation direction D1. In the present embodiment, the 2 nd projection 63, the 1 st projection 61, the 3 rd projection 71, and the 4 th projection 73 are arranged such that the 2 nd deformation direction D2 and the 1 st deformation direction D1 are antiparallel.
The 2 nd positioning pin 70 may be disposed so that the 2 nd projection 63 and the 4 th projection 73 face each other with respect to the 1 st positioning pin 60. For example, the 1 st projection 61, the 2 nd projection 63, the 4 th projection 73, and the 3 rd projection 71 may be arranged in this order from the 2 nd short side surface 50f toward the 1 st deformation direction D1.
< action >
Next, the operation of the present embodiment will be described.
As shown in fig. 11 (a), the installation surface 50a is in contact with the circuit board 31 in a state where no offset between the circuit board 31 and the bus bar assembly 40 is generated. Therefore, the 1 st step surface 65b of the 1 st claw portion 65 is separated from the 1 st surface 31a of the circuit substrate 31 by the gap distance d in the thickness direction of the circuit substrate 31. The bus bar assembly 40 is connected to the circuit board 31 at the board connection portion 43 by soldering or the like using the solder S.
Assuming that the bus bar assembly 40 moves relative to the circuit substrate 31 in a direction parallel to the 2 nd surface 31b of the circuit substrate 31, the 1 st shaft portion 62 or the 2 nd shaft portion 64 of the 1 st positioning pin 60 interferes with the 1 st positioning hole 35. Thus, the 1 st positioning pin 60 restricts the movement of the bus bar assembly 40 along the 2 nd surface 31b of the circuit substrate 31.
As shown in fig. 11 (b), the bus bar assembly 40 is sometimes offset in the thickness direction of the circuit substrate 31. The cause of such displacement includes, for example, vibration of the motor-driven compressor 10 caused by driving of the compression unit 20, and impact to the motor-driven compressor 10 from the outside.
When the bus bar assembly 40 is offset from the circuit board 31 in the thickness direction by the gap distance d, the 1 st claw portion 65 is engaged with the 1 st surface 31a of the circuit board 31. Thereby, the 1 st claw portion 65 restricts the movement of the bus bar assembly 40 in the direction perpendicular to the 2 nd surface 31b of the circuit substrate 31. Accordingly, the bus bar assembly 40 is coupled with the circuit substrate 31 at the 1 st claw portion 65 of the 1 st positioning pin 60.
The bus bar assembly 40 is coupled to the circuit board 31 at the board connection portion 43 and the 1 st positioning pin 60. In other words, the circuit substrate 31 is coupled with the bus bar assembly 40 at the connection hole 34 and the 1 st positioning hole 35.
When the bus bar assembly 40 is offset in the thickness direction of the circuit substrate 31, the set surface 50a is inclined with respect to the 2 nd surface 31 b.
At this time, the larger the deviation of the bus bar assembly 40 with respect to the circuit substrate 31, the larger the angle formed by the installation surface 50a and the 2 nd surface 31 b. Therefore, the magnitude of the angle formed by the setting surface 50a and the 2 nd surface 31b reflects the offset of the bus bar assembly 40 with respect to the circuit substrate 31. Therefore, in the following description, the angle formed by the installation surface 50a and the 2 nd surface 31b is sometimes referred to as "offset amount".
The maximum offset θ1 in the present embodiment means when the 1 st nail 65 is locked to the 1 st surface 31a of the circuit board 31. At this time, when the distance between the connection hole 34 and the 1 st positioning hole 35 is set to L1, the offset amount θ1 is represented by θ1=arctan (d/L1).
As a comparative example, a case where the terminal housing portion 52 of the bus bar assembly 40 protrudes from the outer edge portion 31c of the circuit substrate 31 in the direction along the 1 st surface 31a of the circuit substrate 31 will be described as an example of a case where the opening portion 32 is not provided in the circuit substrate 31.
As shown in fig. 12 (a), the 1 st positioning pin 60 cannot be provided in the area of the installation surface 50a protruding from the outer edge 31c of the circuit board 31. In this region, the installation surface 50a includes a region closer to the 2 nd short side surface 50f than the terminal accommodating portion 52. Therefore, the 1 st positioning pin 60 has to be provided in a region closer to the 1 st short side surface 50e than the terminal housing portion 52. Accordingly, the distance L2 between the connection hole 34 and the 1 st positioning hole 35 in the comparative example is shorter than the distance L1 in embodiment 1.
Therefore, as shown in fig. 12 (b), the offset amount θ2 in the case where the 1 st claw portion 65 is locked to the 2 nd surface 31b in the comparative example is arctan (d/L2), and therefore, the maximum offset amount θ2 in the comparative example is larger than the maximum offset amount θ1 in the present embodiment.
As shown in fig. 4, the 1 st nail 65 is engaged with the 1 st positioning hole 35. Thus, when the 1 st surface 31a of the circuit board 31 is viewed in plan, the 1 st claw portion 65 does not protrude from the outer edge portion 31 c. Therefore, when the other member interferes with the outer edge portion 31c, interference between the member and the 1 st claw portion 65 can be suppressed.
< Effect >
Effects of the present embodiment will be described below.
(1) The housing 50 includes: a terminal accommodating portion 52, the terminal accommodating portion 52 accommodating the terminal insertion portion 42; a 1 st positioning pin 60, wherein the 1 st positioning pin 60 performs positioning relative to the circuit board 31; and a 1 st claw portion 65, wherein the 1 st claw portion 65 is locked to the circuit board 31. The circuit board 31 includes a connection hole 34 into which the board connection portion 43 is inserted and a 1 st positioning hole 35 into which the 1 st positioning pin 60 is inserted. The opening 32 is disposed between the connection hole 34 and the 1 st positioning hole 35. The 1 st nail portion 65 is engaged with the 1 st positioning hole 35.
Thus, when the bus bar assembly 40 moves along the 2 nd surface 31b of the circuit substrate 31, the 1 st positioning pin 60 interferes with the 1 st positioning hole 35. Thereby, the movement of the bus bar assembly 40 along the 2 nd surface 31b of the circuit substrate 31 can be restricted.
When the bus bar assembly 40 moves in the direction perpendicular to the 2 nd surface 31b of the circuit substrate 31, the 1 st claw portion 65 is locked in the 1 st positioning hole 35. Thereby, the bus bar assembly 40 can be restricted from moving in the direction perpendicular to the 2 nd surface 31b of the circuit substrate 31.
Since the 1 st nail 65 is engaged with the 1 st positioning hole 35 of the circuit board 31, other members are less likely to interfere with the 1 st nail 65 than the case where the 1 st nail 65 is engaged with the outer edge 31c of the circuit board 31. Therefore, the displacement of the bus bar assembly 40 with respect to the circuit substrate 31 can be suppressed.
Therefore, the poor connection between the bus bar assembly 40 and the circuit board 31 can be suppressed.
(2) The 1 st positioning pin 60 includes a 1 st projection 61 and a 2 nd projection 63 spaced from the 1 st projection 61.
The 1 st projection 61 includes a 1 st shaft portion 62 extending toward the circuit board 31. The 2 nd projection 63 includes: a 2 nd shaft portion 64, the 2 nd shaft portion 64 being elastically deformable in a 1 st deformation direction D1 from the 1 st projection 61 toward the 2 nd projection 63 and extending toward the circuit substrate 31; and a 1 st claw portion 65, the 1 st claw portion 65 being connected to the 2 nd shaft portion 64. The 1 st nail portion 65 is engaged with the 1 st positioning hole 35.
Thus, when the bus bar assembly 40 is offset in the thickness direction of the circuit board 31 with respect to the circuit board 31, the 1 st claw portion 65 of the 1 st positioning pin 60 is locked to the circuit board 31. At this time, since the opening 32 is disposed between the connection hole 34 and the 1 st positioning hole 35, the distance L1 between the connection hole 34 and the 1 st positioning hole 35 becomes longer than in the case where the 1 st positioning hole 35 is disposed between the opening 32 and the connection hole 34. Therefore, the offset amount θ1 of the bus bar assembly 40 can be reduced.
(3) The cross-sectional area of the 1 st shaft portion 62 in the plane perpendicular to the direction in which the 1 st shaft portion 62 extends is larger than the cross-sectional area of the 2 nd shaft portion 64 in the plane perpendicular to the direction in which the 2 nd shaft portion 64 extends.
Thus, the 1 st shaft portion 62 is less deformable than the 2 nd shaft portion 64. Therefore, the 1 st shaft portion 62 of the 1 st positioning pin 60 interferes with the 1 st positioning hole 35, so that the bus bar assembly 40 can be prevented from being displaced relative to the circuit board 31.
(4) The bus bar assembly 40 is provided with a 2 nd positioning pin 70. The circuit board 31 includes the 2 nd positioning hole 36 into which the 2 nd positioning pin 70 is inserted. The 2 nd positioning hole 36 is disposed between the connection hole 34 and the opening 32.
Thus, when the bus bar assembly 40 is about to rotate with respect to the circuit board 31 about the 1 st positioning pin 60 due to vibration of the motor-driven compressor 10 or the like, the rotation is restricted by the 2 nd positioning pin 70. Therefore, the displacement of the bus bar assembly 40 with respect to the circuit substrate 31 in the rotational direction can be suppressed.
(5) The 2 nd positioning pin 70 is disposed so as to be separated from the 1 st positioning pin 60 in the 1 st deformation direction D1.
Thus, when elastic deformation of the 2 nd protrusion 63 is caused due to the displacement of the bus bar assembly 40 in the 1 st deformation direction D1 with respect to the circuit substrate 31, the 2 nd positioning pin 70 interferes with the 2 nd positioning hole 36. Therefore, the bus bar assembly 40 can be restrained from being displaced in the 1 st deformation direction D1 with respect to the circuit substrate 31.
(6) The 2 nd positioning pin 70 includes a 3 rd projection 71 and a 4 th projection 73 spaced apart from the 3 rd projection 71. The 3 rd projection 71 includes a 3 rd shaft portion 72 extending toward the circuit board 31. The 4 th projection 73 includes: a 4 th shaft portion 74, the 4 th shaft portion 74 being elastically deformable in a 2 nd deformation direction D2 from the 3 rd projection 71 toward the 4 th projection 73 and extending toward the circuit substrate 31; and a 2 nd claw portion 75, wherein the 2 nd claw portion 75 is connected to the 4 th shaft portion 74 and is locked to the circuit board 31.
The cross-sectional area of the 3 rd shaft portion 72 in the plane perpendicular to the direction in which the 3 rd shaft portion 72 extends is larger than the cross-sectional area of the 4 th shaft portion 74 in the plane perpendicular to the direction in which the 4 th shaft portion 74 extends.
Thereby, the 2 nd claw portion 75 of the 2 nd positioning pin 70 restricts the movement of the bus bar assembly 40 in the thickness direction of the circuit substrate 31 in addition to the 1 st claw portion 65 of the 1 st positioning pin 60. This makes it possible to disperse the force applied to the 1 st pawl 65 to the 2 nd pawl 75 during the restriction. Therefore, the burden imposed on the bus bar assembly 40 when the offset is suppressed can be reduced.
(7) Further, the 1 st projection 61 and the 3 rd projection 71 are opposed to each other.
Thus, when the bus bar assembly 40 is to be offset in the 1 st deformation direction D1 with respect to the circuit substrate 31, the 1 st projection 61 interferes with the 1 st positioning hole 35, or the 3 rd projection 71 interferes with the 2 nd positioning hole 36. For example, when the bus bar assembly 40 is offset from the 1 st positioning pin 60 to the 2 nd positioning pin 70 with respect to the circuit substrate 31, the 1 st projection 61 interferes with the 1 st positioning hole 35. On the other hand, when the bus bar assembly 40 is offset from the 2 nd positioning pin 70 to the 1 st positioning pin 60 with respect to the circuit substrate 31, the 3 rd projection 71 interferes with the 2 nd positioning hole 36. Therefore, the bus bar assembly 40 can be restrained from being displaced in the 1 st deformation direction D1 with respect to the circuit substrate 31.
(8) The bus bar 41 includes a plate-shaped connecting portion 44 that connects the terminal insertion portion 42 and the board connection portion 43. The housing 50 includes a receiving groove 53 that receives the coupling portion 44, and a support portion 54 that supports the coupling portion 44 by protruding from an inner side surface 53a of the receiving groove 53 in the width direction of the receiving groove 53.
Thus, the connecting portion 44 is supported by the support portion 54 from the width direction of the accommodating groove 53, and the movement of the bus bar 41 in the housing 50 can be restricted. Therefore, the offset between the bus bar 41 and the housing 50 can be suppressed.
(9) The opening 32 is opened with respect to the outer edge 31c of the circuit board 31.
Thus, the formation of the opening 32 is easier than the case where the opening 32 penetrates the inside of the circuit board 31. Accordingly, inverter device 30 mounted to motor-driven compressor 10 can be easily manufactured.
< modification >
The embodiment can be modified as follows. The embodiments and the following modifications can be combined with each other within a range that is not technically contradictory.
The shape of the opening 32 is not limited to the embodiment, and may be, for example, a triangular notch or a semicircular notch.
The opening 32 may be a through hole which does not open to the outer edge 31 c.
The housing 50 may not include the support portion 54. In other words, the inner surface 53a may be a plane that does not protrude in the width direction of the accommodating groove 53.
The housing 50 may not have the accommodation groove 53 accommodating the coupling portion 44. In this case, the connection portion 44 may be exposed from the case 50 as long as insulation from the circuit board 31 and the other bus bar 41 is ensured.
The o 2-th deformation direction D2 may not be antiparallel to the 1-th deformation direction D1. For example, the 2 nd deformation direction D2 may be perpendicular to the 1 st deformation direction D1.
The o 2 th positioning pin 70 may not have the same shape as the 1 st positioning pin 60, and may have any shape. For example, as shown in fig. 13, the 2 nd positioning pin 70 may be a cylindrical protrusion. In other words, the 2 nd positioning pin 70 may not have the 4 th protrusion 73.
The o 2 nd positioning pin 70 may be disposed so as not to be separated from the 1 st positioning pin 60 in the 1 st deformation direction D1. For example, the 2 nd positioning pin 70 may be provided between the 1 st bus bar housing portion 51a and the 2 nd bus bar housing portion 51 b.
The o-bar assembly 40 may not include the 2 nd positioning pin 70. With this, the circuit board 31 may not have the 2 nd positioning hole 36. Even in this case, the circuit substrate 31 and the bus bar assembly 40 are coupled with the substrate coupling portion 43 through the coupling hole 34, and are coupled with the 1 st positioning hole 35 and the 1 st positioning pin 60. The combination of these two portions suppresses the offset between the circuit substrate 31 and the bus bar assembly 40.
The shape of the o 1 st positioning pin 60 may be arbitrary as long as the o 1 st claw 65 engaged with the circuit board 31 is provided. For example, the 1 st positioning pin 60 may not have the 1 st projection 61, and may have the 2 nd projection 63.
The o 1 st positioning pin 60 may have any shape as long as it can be inserted into the 1 st positioning hole 35 and the 1 st claw portion 65 can be locked to the circuit board 31 in the inserted state. For example, the 1 st positioning pin 60 may be provided with a 1 st claw portion 65 on a quadrangular prism-shaped projection.
The 1 st pawl 65 may not be locked to the 1 st positioning hole 35, but may be locked to the opening 32. In this case, the 1 st nail portion 65 may not be provided to the 1 st positioning pin 60. The "1 st claw portion 65 is locked to the opening portion 32" means that the 1 st claw portion 65 is locked to the peripheral edge of the end portion of the opening portion 32 in a state where the 1 st claw portion 65 is inserted so as to penetrate the opening portion 32. In the present embodiment, the peripheral edge of the end of the opening 32 is included in the 1 st surface 31a of the circuit board 31.
As shown in fig. 14, for example, the 1 st claw portion 65 may be locked to the 2 nd side portion 32b of the opening portion 32. In this case, the 1 st nail 65 may be provided on a different protrusion from the 1 st positioning pin 60. In addition, the 2 nd claw portion 75 may be locked to the 1 st side portion 32a of the opening 32, similarly to the 1 st claw portion 65. In this case, the 2 nd nail portion 75 may be provided on a different protrusion from the 2 nd positioning pin 70. Further, the 2 nd positioning pin 70 and the 2 nd claw 75 may not be provided. In this case, the opening 32 is preferably provided between the connection hole 34 and the region of the circuit board 31 that is locked to the 1 st nail 65.
The number and positions of the substrate fastening holes 33a and 33b are not limited to the embodiment, and may be any.
The busbar accommodating portion 51 may not be arranged in the short side direction of the case 50. The bus bar storage portion 51 may not be arranged in a direction perpendicular to the extending direction. For example, the bus bar housing portion 51 may be disposed at a position separated from the adjacent other bus bar housing portion 51 in the longitudinal direction of the case 50 within the surface of the installation surface 50 a.
The substance compressed by the compressing portion 20 is not limited to the refrigerant. For example, the substance compressed by the compression unit 20 may be a fluid other than a refrigerant such as oxygen, nitrogen, or air.
Description of the reference numerals
10. Electric compressor
20. Compression part
30. Inverter device
31. Circuit substrate
32. An opening part
34. Connecting hole
35 st positioning hole 1
36 nd positioning hole
40. Bus bar assembly
41. Bus bar
42. Terminal insertion part
43. Substrate connection part
44. Connecting part
50. Shell body
53. Containing groove
53a inner side 53a
54 support portion
60 st positioning pin
61 st protrusion 1
62 1 st shaft portion
63 nd protrusion 2
64 nd shaft portion
65 st jaw portion 1
70 nd positioning pin
71 rd protrusion 3
72 rd shaft portion 3
73 th protrusion 4
74 th shaft portion
75 nd jaw portion
D1 st deformation direction
D2 nd deformation direction

Claims (7)

1. An electric compressor is provided with:
a compression portion that compresses a fluid;
An electric motor that drives the compression section;
an airtight terminal connected with the electric motor;
an inverter device that supplies electric power to the electric motor via the airtight terminal; and
a housing having a motor housing chamber for housing the electric motor,
the housing includes an inverter housing chamber that is partitioned from the motor housing chamber and houses the inverter device,
the converter device includes: a circuit board having an opening; and a bus bar assembly mounted to the circuit substrate,
the bus bar assembly includes a bus bar and a housing accommodating the bus bar,
the bus bar includes: a substrate connection portion electrically connected to the circuit substrate; and a terminal insertion portion into which the airtight terminal is inserted through the opening portion,
the housing is provided with: a terminal housing portion that houses the terminal insertion portion; a positioning pin that performs positioning with respect to the circuit board; and a claw portion which is engaged with the circuit board,
The circuit board is provided with: a connection hole into which the substrate connection part is inserted; and a positioning hole into which the positioning pin is inserted,
the opening is arranged between the connecting hole and the positioning hole,
the claw portion is locked to the opening or the positioning hole.
2. The motor-driven compressor of claim 1,
the positioning pin is provided with a 1 st protrusion and a 2 nd protrusion separated from the 1 st protrusion,
the 1 st projection has a 1 st shaft portion extending toward the circuit board,
the 2 nd protrusion includes: a 2 nd shaft portion elastically deformable in a deformation direction from the 1 st projection toward the 2 nd projection and extending toward the circuit substrate; and the claw portion connected to the 2 nd shaft portion,
the claw part is clamped in the positioning hole,
the cross-sectional area of the 1 st shaft portion in a plane perpendicular to the direction in which the 1 st shaft portion extends is larger than the cross-sectional area of the 2 nd shaft portion in a plane perpendicular to the direction in which the 2 nd shaft portion extends.
3. The motor-driven compressor of claim 2,
in the case where the positioning pin is set to be the 1 st positioning pin and the positioning hole is set to be the 1 st positioning hole,
The bus bar assembly is provided with a 2 nd positioning pin for positioning relative to the circuit substrate,
the circuit board is provided with a 2 nd positioning hole for inserting the 2 nd positioning pin,
the 2 nd positioning hole is arranged between the connecting hole and the opening.
4. The motor-driven compressor according to claim 3,
the 2 nd positioning pin is disposed apart from the 1 st positioning pin in the deformation direction.
5. The motor-driven compressor of claim 4,
when the claw portion is set as the 1 st claw portion and the deformation direction is set as the 1 st deformation direction,
the 2 nd positioning pin is provided with a 3 rd protrusion and a 4 th protrusion separated from the 3 rd protrusion,
the 3 rd projection has a 3 rd shaft portion extending toward the circuit board,
the 4 th protrusion includes: a 4 th shaft portion elastically deformable in a 2 nd deformation direction from the 3 rd projection toward the 4 th projection and extending toward the circuit substrate; and a 2 nd claw portion connected to the 4 th shaft portion and locked to the circuit board,
the cross-sectional area of the 3 rd shaft portion in a plane perpendicular to the direction in which the 3 rd shaft portion extends is larger than the cross-sectional area of the 4 th shaft portion in a plane perpendicular to the direction in which the 4 th shaft portion extends,
The 1 st projection and the 3 rd projection are opposite to each other, or the 2 nd projection and the 4 th projection are opposite to each other.
6. The motor-driven compressor according to any one of claim 1 to 5,
the bus bar includes a plate-shaped connecting portion for connecting the substrate connecting portion and the terminal insertion portion,
the housing is provided with: a receiving groove that receives the connecting portion; and a support portion that supports the connection portion by protruding from an inner side surface of the accommodation groove in a width direction of the accommodation groove.
7. The motor-driven compressor according to any one of claim 1 to 6,
the opening is open to an outer peripheral edge of the circuit board.
CN202280014113.XA 2021-03-29 2022-03-09 electric compressor Pending CN116830430A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2021-055707 2021-03-29
JP2021055707A JP7435520B2 (en) 2021-03-29 2021-03-29 electric compressor
PCT/JP2022/010350 WO2022209671A1 (en) 2021-03-29 2022-03-09 Electric compressor

Publications (1)

Publication Number Publication Date
CN116830430A true CN116830430A (en) 2023-09-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202280014113.XA Pending CN116830430A (en) 2021-03-29 2022-03-09 electric compressor

Country Status (4)

Country Link
JP (1) JP7435520B2 (en)
CN (1) CN116830430A (en)
DE (1) DE112022001844T5 (en)
WO (1) WO2022209671A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2023163965A (en) * 2022-04-28 2023-11-10 株式会社豊田自動織機 Electric motor
JP2024099915A (en) * 2023-01-13 2024-07-26 サンデン株式会社 Motor compressor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5054991B2 (en) 2007-02-01 2012-10-24 三菱重工業株式会社 Busbar connection structure and inverter-integrated electric compressor
JP6552166B2 (en) * 2014-07-15 2019-07-31 日本電産トーソク株式会社 Motor for electric oil pump
EP3879681B1 (en) 2018-12-19 2023-11-29 NSK Ltd. Electric drive device and electric power steering device

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JP7435520B2 (en) 2024-02-21
DE112022001844T5 (en) 2024-01-11
WO2022209671A1 (en) 2022-10-06

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