JP2012112274A - Electric compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve installation structure of a terminal for electrically connecting an inverter device and an electric motor to secure durability of a fixing state of the terminal, and to facilitate installation of a circuit board even when an inverter circuit board and an installation position of the terminal overlap each other.SOLUTION: The terminal 60 is fixed to a through-hole 61 formed in a partition wall 50. When an inverter side connector 74 and an electric motor side connector 76 are electrically connected via the terminal 60, a body part 63 of the terminal 60 is constituted of an insertion part 63a with a terminal pin 64 fixed therethrough and a flange part 63b. The flange part 63b is locked on the partition wall 50 by being inserted from the electric motor storage part side into the through-hole 61, and is held by a snap ring 71. The terminal pin 64 of the terminal 60 is inserted through a through-hole 72 of the inverter circuit board 52, and is connected to the inverter side connector 74.

Description

  The present invention relates to an electric compressor configured by mounting an inverter device in a housing in which a compression mechanism and an electric motor are built, and in particular, a terminal mounting structure for electrically connecting the electric motor and the inverter device. About.

  In an electric compressor in which a compression mechanism and an electric motor are housed in a housing, an inverter device for driving and controlling the electric motor is required, and this inverter device forms an enclosure for the refrigerant gas inflow path (the enclosure of the electric motor housing portion is A configuration is considered in which the housing partition wall is integrally mounted with a partition wall formed therebetween, and electric power is supplied from the inverter device to the motor via a terminal provided on the partition wall.

  As a configuration of such a terminal, a main body portion having three terminal pins penetrated and fixed to one part of a partition wall is attached, and a cable is connected to the inverter side connector connected to the inverter circuit via the cable and the stator of the motor. A configuration in which the inverter circuit and the stator are electrically connected by attaching the motor-side connector connected via the terminal pins in a direction opposite to the terminal pins is often used.

For example, as shown in Patent Document 1, a terminal (airtight terminal) is fitted into an opening formed in a housing together with an O-ring from the outside, and a circlip is fitted into a circlip groove formed in the opening from the outside. Thus, as shown in Patent Document 2, the body of the terminal (glass sealed terminal) and its mounting plate are integrally formed, and the mounting plate is attached to the housing. A configuration in which the terminal is fixed by inserting the boss into the boss from the outside and fitting the snap ring into the groove formed in the inner surface of the boss from the outside is known.
Further, as shown in Patent Document 3 described below, a three-phase synchronous motor and a scroll-type compression unit are accommodated in a housing, and the housing partition wall and the housing are disposed on the opposite side of the compression unit with respect to the motor. A housing section surrounded by a screwed lid member is formed, a motor drive circuit is disposed in the housing section, and terminals of terminals attached to the partition wall are disposed on the outer edge of the inverter circuit board. Also known is a configuration in which the inverter circuit board is fixed to the partition wall by being directly connected to the inverter output terminal of each phase of the motor drive circuit.

  In this publication, the terminal is inserted from the motor side and the collar is locked to the partition wall, or the terminal terminal is used as a support member for fixing the inverter, and the peripheral edge of the inverter circuit board is spaced apart in the circumferential direction. Also disclosed is a configuration in which they are distributed.

JP 2007-128756 A JP-A-9-53587 JP 2002-371983 A

  However, in the configurations shown in Patent Documents 1 and 2, a terminal (airtight terminal) is fitted into the opening portion of the housing together with an O-ring from the outside, and a snap ring (circular clip) is inserted into the groove formed in the opening portion from the outside. Since the terminal is fixed by fitting, the internal pressure acting on the terminal is received only by the snap ring when the pressure in the housing (internal pressure) is high like a compressor. The terminal fixing structure has a problem in durability.

  Therefore, the present invention improves durability of a terminal fixed state to a partition wall by improving a terminal mounting state in which a plurality of terminal pins necessary for electrical connection between an inverter device and an electric motor are collectively fixed. The main problem is to provide an electric compressor capable of ensuring the above.

  By the way, in a configuration in which a terminal in which a plurality of terminal pins are collectively fixed and attached is mounted on a partition wall, in order to avoid interference between the terminal and the inverter circuit board, each installation location is often shifted. However, when the installation location of the terminal is shifted from the installation location of the inverter circuit board, it is necessary to secure the installation area of both, and there is a disadvantage that the size of the compressor is increased.

  In order to eliminate such inconvenience, a configuration in which a terminal terminal penetrating the partition wall as shown in Patent Document 3 is used as a member for supporting the peripheral edge of the inverter circuit board is also conceivable. In addition, since it is difficult to penetrate the partition wall in the vicinity of the inner peripheral surface of the housing, it is necessary to penetrate the partition wall away from the inner peripheral surface of the housing. For this reason, in the above-described configuration in which the terminal terminal supports the peripheral edge of the inverter circuit board, the inverter circuit board accommodated in the housing must be formed small so as to be separated from the inner peripheral surface of the housing. In order to secure the installation area of the motor drive circuit to be used, a plurality of circuit boards are required. In the configuration shown in Patent Document 3, a plurality of (two) circuit boards are arranged in the axial direction of the compressor. In this case, the compressor has a disadvantage that the dimension in the axial direction of the compressor becomes long (the inverter housing portion becomes large).

  Also, in the configuration where the inverter circuit board and the terminal are installed separately, the positioning to the housing can be adjusted individually, so there is no need to increase the mounting accuracy, but the terminal installation position and the inverter circuit board installation position are When it is not possible to physically shift the installation, or when it is desired to overlap the installation position of the terminal and the installation position of the inverter circuit board due to the demand for miniaturization, the installation structure becomes complicated, and the terminal and inverter There is a disadvantage that strict positioning management of the circuit board is required.

  Therefore, in the present invention, even when the installation positions of the inverter circuit board and the terminal overlap each other, it is possible to reduce the size of the compressor by preventing the increase of the inverter accommodating portion, Another object of the present invention is to provide an electric compressor that can be easily attached without increasing the positioning accuracy of the inverter circuit board.

  In order to achieve the above object, according to the present invention, an electric compressor according to the present invention includes an internal compressor that includes a compression mechanism, an electric motor that drives the compression mechanism, and an inverter circuit that drives and controls the electric motor. A circuit board, and an electric motor housing part for housing the electric motor and an inverter housing part for housing the inverter circuit board are separated by a partition wall, and a terminal is fixed to a through hole formed in the partition wall, An inverter side connector connected to the inverter circuit via a cable and a motor side connector connected to the motor via a cable are connected to the terminal, whereby the inverter circuit is electrically connected to the motor via the terminal. In the configuration in which the terminals are connected to each other, the terminal has a main body portion and a plurality of terminal pins fixed to the main body portion. The body part is inserted into the through hole and the terminal pin is hermetically fixed through the insertion part, and is formed integrally with the insertion part, and has a larger diameter than the insertion part. A flange portion, and the terminal allows the insertion portion to be inserted into the through-hole from the side of the electric motor housing portion and the flange portion to be locked to the partition wall so as to maintain the state. The main body is fixed to the partition wall by a removal preventing member.

  Therefore, in such a configuration, a terminal having a plurality of terminal pins penetrated and fixed to the main body portion is locked from the side of the motor housing portion with respect to the through hole, and the terminal main body portion is prevented from being pulled out so as to keep the state. Since the member is fixed to the partition wall, the flange portion of the main body is locked to the partition wall even when the terminal receives the internal pressure of the housing (pressure in the motor housing portion). It becomes possible to receive the internal pressure, and it is possible to reduce the load applied to the removal preventing member. For this reason, since an excessive load is not applied to the removal preventing member, it is possible to improve the durability of the terminal fixed to the partition wall.

  In addition, as the removal prevention member, a member represented by a snap ring or the like is used, and the insertion portion of the terminal is projected from the through hole to the inverter accommodation portion, and the removal prevention member is protruded from the inverter accommodation portion of the insertion portion. The structure attached to the circumference | surroundings, the structure attached to the said partition wall on the opposite side to the insertion part of a flange part, etc. can be considered.

  According to the former configuration, since the prevention member is attached to the outer periphery of the main body portion of the terminal, the attachment groove of the prevention member can be processed simultaneously with the processing of the main body portion, and the processing work is facilitated. Further, since the slip prevention member is attached to the outer periphery of the main body of the terminal, the assembling work is facilitated, and the workability during assembling is improved. Further, according to the latter configuration, since the insertion into the insertion hole of the terminal and the attachment of the removal preventing member can be performed from the same direction, the assembling work is facilitated and the workability at the time of assembling is improved.

Furthermore, in the above configuration, the terminal pin protruding from the main body portion toward the inverter housing portion may be connected to the inverter-side connector through a through hole formed in the inverter circuit board.
In such a configuration, it is possible to avoid mutual interference while allowing an overlap between the terminal mounting location and the inverter circuit board mounting location, and the outer edge of the inverter circuit board is connected to the inner periphery of the housing. It is possible to provide a large amount along the surface, and it is not necessary to provide a plurality of substrates, so that the axial and radial dimensions of the compressor can be shortened. Further, since it is possible to attach the terminal and the inverter circuit board independently, it is not necessary to increase the positioning accuracy.

  In the configuration in which the drive circuit module is disposed on the side facing the partition wall, the inverter circuit board may be positioned by screwing the drive circuit module to the partition wall.

  As described above, according to the present invention, the terminal includes the main body portion and the terminal pin fixed to and through the main body portion, and the main body portion is inserted into the through hole and the plurality of terminal pins are airtight. The insertion portion fixedly penetrated and a flange portion formed integrally with the insertion portion and having a diameter larger than the through hole. The terminal has the insertion portion from the motor housing portion side with respect to the through hole. Since the flange portion is locked to the partition wall and the terminal body is fixed to the partition wall with the prevention member so as to maintain the state, the internal pressure from the motor housing portion is applied to the terminal. The direction in which it acts and the direction in which it is prevented from coming off coincide with each other, and the flange portion can receive the internal pressure of the motor housing portion. For this reason, it is possible to reduce the load applied to the slip-off preventing member, so that excessive load is not concentrated on the slip-off preventing member, and the durability of the fixing structure to the partition wall of the terminal can be improved.

  Moreover, even if the terminal installation position and the inverter circuit board installation position overlap, the terminal pin of the terminal is connected to the inverter side connector through the through hole formed in the inverter circuit board. It becomes possible to mount without interfering with each other. For this reason, it is not necessary to displace the terminal from the installation position of the inverter circuit board, and the inverter circuit board can be formed large along the inner peripheral surface of the housing. It is not necessary to provide the compressor, and the size in the axial direction or the radial direction of the compressor can be reduced to reduce the size.

  In addition, the terminal pin and the inverter circuit board positioning can be adjusted separately by passing the terminal pin of the terminal through the through hole of the inverter circuit board and connecting to the connector on the inverter side. It becomes unnecessary to increase the positioning accuracy of the substrate.

FIG. 1 is a cross-sectional view showing the overall configuration of an electric compressor according to the present invention. FIG. 2A is a view of the partition wall that partitions the motor housing portion and the inverter housing portion as viewed from the inverter housing portion side, and FIG. 2B shows the inverter circuit board that is housed in the inverter housing portion. FIG. FIG. 3 is an enlarged cross-sectional view showing the vicinity of the terminal mounting in FIG.

  Hereinafter, the electric compressor of the present invention will be described with reference to the drawings.

  FIG. 1 shows an electric compressor 1 suitable for a refrigeration cycle using a refrigerant as a working fluid. This electric compressor 1 is provided with a compression mechanism 3 on the left side in the figure in a housing 2 made of an aluminum alloy, and an electric motor 4 for driving the compression mechanism on the right side in the figure. Yes. In FIG. 1, the right side in the figure is the front of the compressor, and the left side in the figure is the rear of the compressor.

  The housing 2 includes a compression mechanism housing member 2 a that houses the compression mechanism 3, an electric motor housing member 2 b that houses the electric motor 4 that drives the compression mechanism 3, and an inverter housing that houses the inverter device 5 that controls the driving of the electric motor 4. The housing member 2c is positioned with the positioning pins 7 and fastened with the fastening bolts 8 in the axial direction.

A partition wall 49 integrally formed with a shaft support portion 9a is provided on the side of the motor housing housing member 2b facing the compression mechanism housing housing member 2a, and the motor housing housing member 2b is opposed to the motor housing housing member 2b. A partition wall 50 in which the shaft support portion 9b is integrally formed is provided on the side to be supported, and the drive shaft 10 is rotatably supported by the shaft support portions 9a and 9b of the partition walls 49 and 50 via bearings 11 and 12, respectively. Yes. The partition wall 49, 50 formed on the motor housing housing member 2b and the inverter housing housing member 2c, respectively, the compression mechanism housing portion 13a in which the interior of the housing 2 houses the compression mechanism 3 from the rear, and the motor housing the motor 4. It is partitioned into a housing portion 13b and an inverter housing portion 13c that houses the inverter device 5.
In this example, the inverter accommodating portion 13c that accommodates the inverter circuit board 52 is defined by fixing the lid 14 to the inverter accommodating housing member 2c with a bolt 30.

  The compression mechanism 3 is of a scroll type having a fixed scroll member 15 and an orbiting scroll member 16 disposed opposite thereto, and the fixed scroll member 15 is a disc-shaped end plate fixed inside the rear portion of the housing 2. 15a, a cylindrical outer peripheral wall 15b provided over the entire periphery along the outer edge of the end plate 15a and erected forward, and forward from the end plate 15a inside the outer peripheral wall 15b. It is comprised from the spiral-shaped spiral wall 15c extended toward the direction.

  The orbiting scroll member 16 is composed of a disc-shaped end plate 16a and a spiral spiral wall 16c standing rearward from the end plate 16a, and is erected on the back surface of the end plate 16a. An eccentric shaft 10 a provided at the rear end portion of the drive shaft 10 and eccentric with respect to the axis of the drive shaft 10 is connected to the boss portion 16 b via the bush 17 and the bearing 18. It is supported so that it can revolve around its axis.

  The fixed scroll member 15 and the orbiting scroll member 16 are meshed with each other with their respective spiral walls 15c and 16c, and the ends of the spiral walls 15c and 16c of the respective scroll members 15 and 16 are end plates 15a of the other scroll member. Therefore, the compression chamber 19 is defined in a space surrounded by the end plate 15a and the spiral wall 15c of the fixed scroll member 15 and the end plate 16a and the spiral wall 16c of the orbiting scroll member 16. Has been.

  A thin plate-shaped annular thrust trace 20 is sandwiched between the outer peripheral wall 15 b of the fixed scroll member 15 and the partition wall 49, and the fixed scroll member 15 and the partition wall 49 are interposed via the thrust trace 20. It is faced.

  The thrust trace 20 is formed of a material having excellent wear resistance, and a central hole is formed in the center through which a boss portion 16b of the orbiting scroll member 16 and an Oldham ring 24 described later are inserted. Further, the fixed scroll member 15, the thrust race 20, and the motor housing housing member 2 b are positioned and fixed by positioning pins 33 that are inserted into pin insertion holes formed in the thrust trace 20.

  The shaft support portion 9a formed integrally with the partition wall 49 of the electric motor housing member 2b has a through hole in the center, and its inner surface is formed in a stepwise manner in diameter toward the thrust trace 20, From the front side farthest from the thrust trace 20, a bearing portion accommodating portion 21 that accommodates the bearing 11, and a weight accommodating portion that accommodates the balance weight 22 that is integrated with the bush 17 and rotates as the drive shaft 10 rotates. 23, an Oldham housing part 25 for housing an Oldham ring 24 formed from the end face of the partition wall 49 and preventing the orbiting scroll member 16 from rotating with the orbiting scroll member 16 is formed.

  Therefore, the orbiting scroll member 16 is rotated by the rotation of the drive shaft 10, but revolves around the axis of the drive shaft 10 while the rotation is restricted by the Oldham ring 24.

  Between the outer peripheral wall 15b of the fixed scroll member 15 and the outermost peripheral portion of the spiral wall 16c of the orbiting scroll member 16, a suction chamber that sucks in a refrigerant introduced from a suction port 40, which will be described later, through a suction path 41. 26, and a refrigerant gas compressed in the compression chamber 19 is discharged behind a fixed scroll member 15 in the housing through a discharge hole 27 formed substantially at the center of the fixed scroll member 15. A chamber 28 is defined between the rear end wall of the compression mechanism housing member 2a. The refrigerant gas discharged into the discharge chamber 28 is pumped to the external refrigerant circuit through the discharge port 29.

  On the other hand, the stator 31 and the rotor 32 which comprise the electric motor 4 are provided in the electric motor accommodating part 13b formed in the part ahead of the partition wall 49 in the housing 2. FIG. The stator 31 includes a cylindrical iron core 34 and a coil 35 wound around the iron core 34, and is fixed to the inner surface of the housing 2 (the motor housing member 2b). Further, the drive shaft 10 is fixedly mounted with a rotor 32 made of a magnet rotatably accommodated inside the stator 31, and the rotor 32 is rotated by a rotating magnetic force formed by the stator 31, so that the drive shaft 10 is It is designed to rotate. The stator 31 and the rotor 32 constitute an electric motor 4 composed of a brushless DC motor.

  A suction port 40 for sucking refrigerant gas into the motor housing portion 13b is formed on the side surface of the housing 2 (motor housing housing member 2b), and a gap between the stator 31 and the housing 2 (motor housing housing member 2b). In addition, the refrigerant flowing from the suction port 40 into the motor housing portion 13b is guided to the suction chamber 26 through a hole formed in the partition wall 49 and a gap formed between the fixed scroll member 15 and the housing 2. A suction path 41 is configured.

  As shown in FIG. 2, the inverter device 5 includes an inverter circuit board 52 on which the inverter circuit 51 is mounted along the inner peripheral wall of the inverter housing member 2 c (the motor housing housing member 2 b of the inverter housing housing member 2 c is opposed to the inverter circuit board 52). It is configured to be fixed by screws 54 to a boss portion 53 formed at an interval (at the periphery of the partition wall 50 formed integrally with the shaft support portion 9b). The DC power is converted into multiphase AC power and supplied to the motor 4, and the rotational speed of the motor 4 is controlled based on a control signal from the outside. A drive circuit module 55 in which switching elements of the inverter circuit 51 are modularized is fixed to the back surface of the inverter circuit board 52, that is, the surface facing the partition wall 50. Since this drive circuit module 55 has integrated heat generating elements, it is brought into close contact with a flat installation surface 56 formed on the partition wall 50 via a heat conductive material such as silicon grease, and the state is maintained. It is fixed to the partition wall 50 by a screw 58 inserted through a screw through hole 57 formed in the inverter circuit board 52, and is cooled through the partition wall 50 by the refrigerant flowing through the suction path 41.

  In addition, as shown in FIG. 3, a through hole 61 for attaching a terminal (airtight terminal) 60 is formed in the partition wall 50. The through hole 61 is formed following the large-diameter wall portion 61a formed from the side facing the motor housing portion 13b and the large-diameter wall portion 61a, and has a relatively small diameter on the side facing the inverter housing portion 13c. A small-diameter wall portion 61b formed; and a step portion 61c formed at a boundary portion between the large-diameter wall portion 61a and the small-diameter wall portion 61b. An annular step portion into which the O-ring 62 is fitted is provided in the step portion 61c. 61d is formed.

  The terminal (airtight terminal) 60 is configured to include a main body portion 63 formed of a hard member and a plurality (three) of terminal pins 64 penetratingly fixed to the main body portion 63. The portion 63 is inserted into the through hole 61 and has a bottomed cylindrical insertion portion 63a in which the terminal pin 64 is hermetically penetrated and fixed to the bottom portion 63a-1, and radially outward from the opening of the insertion portion 63a. A flange portion 63b that extends integrally, has a diameter larger than that of the small-diameter wall portion 61b, has a diameter smaller than that of the large-diameter wall portion 61a, and can be locked to the step portion 61c. It is configured.

  The terminal pin 64 is fixed to a pin insertion hole 66 formed in the bottom portion 63a-1 of the insertion portion 63a in an insulated and airtight state through a glass seal member 67, and is fixed to the bottom portion 63a-1. It is attached so as to extend substantially vertically to both sides. The pin insertion hole 66 and the terminal pin 64 fixed to the pin insertion hole 66 are arranged so as to form an equilateral triangle when viewed from the front. In this example, ceramics that secure an insulation distance on both sides of the glass seal member 67 of the terminal pin 64. An insulating member 68 made of is fixed.

  And such a terminal 60 is inserted with the sealing member which consists of O-ring 62 from the motor accommodating part side with respect to the through-hole 61, inserts O-ring 62 in the annular level | step-difference part 61d, and inserts 63a into the inverter accommodating part Protruding to 13c, the flange portion 63b is locked to the step portion 61c formed in the through hole 61, and the vicinity of the tip projected to the inverter accommodating portion 13c of the main body portion 63 (insertion portion 63a) so as to maintain the state. A snap ring (detachment prevention member) 71 is attached to the ring groove 70 formed in the above, so that it is fixed to the partition wall 50. Accordingly, the through hole 61 is hermetically sealed by the terminal 60.

  In the inverter circuit board, through holes 72 are formed so that a plurality of (three) terminal pins can be penetrated without contacting the portions where the terminals 60 are installed. In addition, the inverter side connector 74 is connected to the inverter circuit 51 via a cable 73 on the side facing the lid 14 (the side opposite to the side facing the partition wall 50), and is connected to the stator 31 of the electric motor 4. Also, a motor side connector 76 is connected via a cable 75.

  The inverter-side connector 74 connected to the inverter circuit 51 via the cable 73 is connected to the terminal pin 64 of the terminal (airtight terminal) 60 protruding from the through-hole 72 of the inverter circuit board 52 on the front side (of the inverter circuit board 52). The motor side connector 76 that is mounted from the side opposite to the side facing the partition wall 50 and connected to the stator 31 via the cable 75 is connected to the terminal pin 64 from the rear side (inside the motor housing portion 13b). The inverter circuit 51 and the stator 31 are electrically connected via a terminal 60 so that the electric motor 4 is supplied with power from the inverter device 5.

  Therefore, when the rotor 32 rotates and the drive shaft 10 is rotated by supplying power to the electric motor 4, the orbiting scroll member 16 is rotated around the eccentric shaft 10 a in the compression mechanism 3. Revolve around the axis of the scroll member 15. At this time, since the orbiting scroll member 16 is prevented from rotating by the rotation preventing mechanism including the Oldham ring 24, only the revolving motion is allowed.

  By the revolving motion of the orbiting scroll member 16, the compression chamber 19 moves from the outer peripheral side of the scroll walls 15c, 16c of both scroll members to the center side while gradually decreasing the volume, so that the suction chamber 26 sucks into the compression chamber 19 The compressed refrigerant gas is compressed, and the compressed refrigerant gas is discharged into the discharge chamber 28 through the discharge hole 27 formed in the end plate 15 a of the fixed scroll member 15. Then, it is sent to the external refrigerant circuit via the discharge port 29.

  In the above configuration, in order to attach the terminal 60 and the inverter circuit board 52 to the housing 2 (inverter housing housing member 2c), before attaching the inverter housing housing member 2c to the inverter circuit board 52, and the inverter housing housing member 2c to the electric motor. Before assembling to the housing housing member 2b, an O-ring is attached to the outer periphery of the insertion portion 63a of the body portion 63 of the terminal 60, and the terminal 60 is inserted into the through hole 61 of the partition wall 50 in this state from the motor housing portion side. The insertion part 63a of the part 63 is inserted, the O-ring 62 is fitted into the annular step part 61d, the insertion part 63a is projected to the inverter housing part, the flange part 63b is brought into contact with the step part 61c, and the flange part 63b is inserted. Lock to the partition wall 50. In order to maintain this state, the snap ring 71 is fitted into the ring groove 70 provided in the vicinity of the tip of the insertion portion 63a protruding from the through hole 61 toward the inverter accommodating portion, and the terminal 60 is connected to the flange portion 63b. And the snap ring 71 are fixed to the partition wall 50 so as to sandwich the small-diameter wall portion 61b.

  Thereafter, the inverter circuit board 52 is attached to the inverter housing member 2c, and the inverter housing member 2c is assembled to the motor housing member 2b. The order of the assembling work is not particularly limited. For example, the work of assembling the inverter circuit board 52 to the inverter housing member 2c and the work of assembling the stator 31 and the rotor 32 to the motor housing housing member 2b are separate. In this case, the terminal pin 64 of the terminal 60 is inserted into the through hole 72 while the drive circuit module 55 faces the partition wall 50 while the inverter circuit board 52 faces the partition wall 50, and the drive circuit module 55 is connected to the partition wall 50. It is made to contact | abut to the installation surface 56. Then, while finely adjusting the position of the inverter circuit board 52, the position of the screw hole of the drive circuit module 55 (screw through hole 57 formed in the inverter circuit board 52) is changed to the screw hole formed in the installation surface 56 of the partition wall 50. The drive circuit module 55 is screwed to the partition wall 50 by matching the position 56a and inserting the screw 58 through the screw through hole 57.

Although the installation position of the inverter circuit board 52 is roughly determined by screwing the drive circuit module 55, the inverter circuit board 52 is screwed to the boss portion 53 with the screw 54 through the screw hole 59 formed on the periphery. It is fixed to the inverter housing member 2c.
Thereafter, the inverter side connector 74 is attached to the terminal pin 64 of the terminal 60 protruding from the through hole 72 of the inverter circuit board 52, and the inverter circuit board 52 is disposed between the main body 63 of the terminal 60 and the inverter side connector 74. (In this example, the inverter circuit board 52 is disposed so as not to contact the main body 63 of the terminal 60 and the inverter-side connector 74).

  As described above, the inverter circuit board 52 is attached to the inverter accommodating housing member 2c, the inverter side connector 74 is attached to the terminal pin 64 of the terminal 60, and the lid body 14 is attached to the inverter accommodating housing member 2c. After the inverter housing housing member 2c is brought close to the motor housing housing member 2b, the motor side connector 76 is attached to the terminal pin 64 of the terminal 60 from the motor housing portion side, and then the inverter housing housing member 2c is attached to the motor housing housing. Fastened to the member 2b by fastening bolts 8;

In addition, the assembly | attachment process mentioned above is not limited to this, Contrary to the process mentioned above, the inverter housing housing member 2c is brought close to the motor housing housing member 2b, and the motor side connector 76 is moved from the motor housing section side. The inverter housing member 2c is attached to the terminal pin 64 of the terminal 60, and then the inverter housing housing member 2c is fastened to the motor housing housing member 2b with the fastening bolts 8. Then, the drive circuit module 55 faces the partition wall 50 with respect to the inverter circuit board 52. In the same manner, the terminal pin 64 of the terminal 60 is inserted into the through hole 72, the drive circuit module 55 is screwed to the partition wall 50 with the screw 58 inserted through the screw through hole 57, and the inverter circuit board 52 Is connected to the boss portion 53 by a screw 54 through a screw hole 59 formed in the periphery. After that, the inverter side connector 74 is attached to the terminal pin 64 of the terminal 60 protruding from the through hole 72 of the inverter circuit board 52, and the inverter circuit board 52 is connected between the main body 63 of the terminal 60 and the inverter side connector 74. You may make it arrange | position to.
Moreover, you may make it replace each said assembly | attachment process suitably as needed.

  Therefore, according to the above configuration, the terminal 60 is fitted from the side of the motor housing portion 13b having a high pressure, and the flange portion 63b is locked to the step portion 61c formed in the partition wall 50. Thus, the direction in which the pressure acts on and the direction in which the stopper is prevented from coming off coincide with each other, and the flange portion can receive the internal pressure of the motor housing portion. For this reason, the load does not concentrate excessively on the snap ring 71, and the durability of the fixing structure of the terminal 60 can be improved.

  In the above-described configuration, since the snap ring 71 is attached to the outer periphery of the main body 63 of the terminal 60, the workability at the time of assembling the snap ring 71 is improved. The ring groove 70 to which the ring 71 is attached can also be processed, and the processing of the main body 63 can be performed efficiently.

  In addition, you may make it provide a clearance gap between the snap ring 71 and the small diameter wall part 61b. With such a configuration, it is possible to further improve workability when the snap ring 71 is fitted into the ring groove 70.

  In addition, since the terminal pin 64 of the terminal 60 is passed through the through hole 72 of the inverter circuit board 52 and connected to the inverter-side connector 74, the mounting position of the terminal 60 and the mounting position of the inverter circuit board 52 overlap each other. Thus, it is possible to avoid mutual interference, and it is not necessary to displace the terminal 60 from the installation position of the inverter circuit board 52, and it is possible to avoid an increase in the size of the compressor in the radial direction.

  Moreover, since the installation location of the terminal 60 and the installation location of the inverter circuit board 52 are overlapped while avoiding mutual interference, the outer edge of the inverter circuit board 52 is the inner peripheral surface of the inverter housing member 2c. It is possible to ensure a large mounting area for the inverter circuit 51 by forming the circuit board so as to be close to the inverter circuit 51. For this reason, it is not necessary to provide a plurality of inverter circuit boards 52, so that the axial or radial dimension of the compressor can be shortened.

  Further, the inverter circuit board 52 has a drive circuit module 55 mounted on the side facing the partition wall 50, and is positioned by screwing the drive circuit module 55 to the partition wall 50, and is screwed to the boss portion 53. The terminal pin 64 of the terminal 60 passes through the through hole 72 of the inverter circuit board 52 with a margin and is connected to the inverter-side connector 74, so that the terminal 60 and the inverter circuit are connected to the inverter housing housing member 2c. It becomes possible to position the board 52 separately, and it becomes unnecessary to increase the positioning accuracy of the terminal 60 and the inverter circuit board 52.

In the above-described configuration, an example in which the snap ring 71 is attached to the vicinity of the tip of the main body 63 (insertion portion 63a) protruding from the through hole 61 and the terminal 60 is fixed to the partition wall 50 is shown. A ring groove 70 ′ is formed in the partition wall 50 on the rear side of the flange portion 63b, that is, on the opposite side to the insertion portion 63a of the flange portion 63b, and a snap ring 71 ′ is fitted into the ring groove 70 ′ to be connected to the terminal 60. May be fixed to the partition wall 50.
According to such a configuration, the insertion of the terminal 60 into the insertion hole and the attachment of the snap ring 71 ′ are operations from the same direction, so that the assembling work is easy, and good workability at the time of assembling. Can be secured.

DESCRIPTION OF SYMBOLS 1 Electric compressor 2 Housing 3 Compression mechanism 4 Electric motor 13b Electric motor accommodating part 13c Inverter accommodating part 49,50 Partition wall 51 Inverter circuit 52 Inverter circuit board 55 Drive circuit module 60 Terminal 61 Through-hole 63 Main part 63a Insertion part 63b Flange part 64 terminal pins 71, 71 ′ snap ring 72 through hole 73, 75 cable 74 inverter side connector 76 motor side connector

Claims (6)

A housing includes a compression mechanism, an electric motor that drives the compression mechanism, and an inverter circuit board that includes an inverter circuit that drives and controls the electric motor, and stores an electric motor housing portion that houses the electric motor and the inverter circuit board. An inverter housing portion is separated through a partition wall, a terminal is fixed to a through hole formed in the partition wall, and the inverter side connector connected to the inverter circuit via a cable and the motor via the cable In the electric compressor that electrically connects the inverter circuit to the electric motor through the terminal by connecting the electric motor-side connector connected to the terminal,
The terminal has a main body portion and a plurality of terminal pins fixed to and through the main body portion.
The body portion is inserted through the through hole and the terminal pin is hermetically penetrated and fixed, and a flange portion formed integrally with the insertion portion and having a larger diameter than the insertion portion, Have
The terminal is inserted into the through hole from the electric motor housing portion side and the flange portion is locked to the partition wall, and the main body portion is pulled out by a prevention member so as to maintain the state. An electric compressor characterized by being fixed to the partition wall.   The insertion portion of the terminal protrudes from the through hole to the inverter accommodating portion, and the removal prevention member is attached around a portion of the insertion portion that protrudes from the inverter accommodating portion. Item 4. The electric compressor according to Item 1.   The electric compressor according to claim 1, wherein the removal preventing member is attached to the partition wall on a side opposite to the insertion portion of the flange portion.   The electric compressor according to any one of claims 1 to 3, wherein the removal preventing member is a snap ring.   5. The terminal pin protruding from the main body portion toward the inverter housing portion is connected to the inverter-side connector through a through hole formed in the inverter circuit board. An electric compressor according to claim 1.   6. The inverter circuit board according to claim 1, wherein a drive circuit module is mounted on a side facing the partition wall, and the inverter circuit board is positioned by screwing the drive circuit module to the partition wall. The electric compressor in any one.

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