JP5249795B2 - Inverter-integrated electric compressor - Google Patents

Description

  The present invention relates to an inverter-integrated electric compressor for an in-vehicle air conditioner in which an inverter device is integrally incorporated on the outer periphery of a housing.

  As a compressor for an air conditioner mounted on a vehicle such as an electric vehicle or a hybrid vehicle, an electric compressor in which an inverter device is integrated is used. In this inverter-integrated electric compressor, an inverter accommodating portion (inverter box) is provided on the outer periphery of a housing in which an electric motor and a compression mechanism are built, and DC power supplied from a high-voltage power supply unit is three-phased therein. An inverter device that converts to AC power and feeds power to the electric motor through a glass sealed terminal is incorporated.

  An inverter device is a power system board on which a high voltage system component such as a smoothing capacitor, a normal mode coil, and a common mode coil generally provided on a high voltage power supply line and a switching circuit composed of a semiconductor switching element such as an IGBT are mounted. And a CPU board or the like on which a control communication circuit composed of elements operating at a low voltage such as a CPU is mounted, and this is incorporated in an inverter accommodating portion provided on the outer periphery of the housing of the electric compressor Are integrated.

  A control communication circuit provided on the CPU board is connected to a vehicle-side host control device, that is, a vehicle-side ECU (Electric Control Unit) via a wiring cable. Also, the inverter device needs to be moistureproof / waterproof, and some of the electrical components are encapsulated in resin, or the inverter accommodating portion is filled with a gel material, and the inverter accommodating portion is hermetically sealed with a cover member to be waterproof. It has a structure. For this reason, the wiring cable connected to an inverter apparatus is penetrated in the inverter accommodating part via the grommet.

  On the other hand, Patent Documents 1 and 2 show examples of a waterproof structure of a wiring cable penetrating portion using a grommet or a waterproof packing. In these Patent Documents 1 and 2, a slit is provided in a waterproof packing having a through hole for passing a cable, and the cable is easily inserted into the packing by inserting the cable into the through hole through the slit. In addition, a technique is disclosed in which waterproofness is secured by tightening and compressing the waterproof packing against a tapered surface to reduce the diameter of the through hole.

Japanese Patent No. 2874690 Utility Model Registration No. 2560549

  However, in the inverter-integrated electric compressor, the number of wiring cables connected to the inverter device is often different depending on the vehicle manufacturer, the vehicle type, and the like, such as at least three and at most eight, for example. For this reason, as shown in Patent Documents 1 and 2, in which slits are individually provided for each of the plurality of through holes and the cables are individually inserted into the through holes, the work efficiency increases as the number of cables increases. There was a problem that it did not necessarily lead to easy assembly and improved productivity. In addition, there is a problem that the risk of deterioration of waterproofness increases as the number of slits increases.

  The present invention has been made in view of such circumstances, and facilitates the incorporation of the inverter device including the insertion of the wiring cable, improves the productivity, and can improve the waterproofness of the inverter housing portion. It is an object to provide an inverter-integrated electric compressor.

In order to solve the above problems, the inverter-integrated electric compressor of the present invention employs the following means.
That is, the inverter-integrated electric compressor according to the present invention is provided with an inverter housing portion whose opening can be sealed by a cover member on the outer periphery of the housing, and the inverter device is housed and installed in the inverter housing portion. In the inverter-integrated electric compressor in which a wiring cable penetrating the inverter housing portion is connected to the inverter device via a grommet, the grommet installation portion provided on the inverter housing portion so as to cover the upper edge thereof And a plurality of through-holes through which the wiring cable penetrates, and a grommet that is cut in a manner that can be divided into two by a slit provided from one end side to the other end side, the grommet in the through-hole Is installed in close contact with the grommet installation part in the state where is inserted, By deforming clamping through the bar member, the introduction portion into the inverter accommodating section of the wire cable, characterized in that it is sealed.

  According to the present invention, the grommet installation part provided on the inverter housing part so as to cover the upper edge of the inverter housing part and the plurality of through holes through which the wiring cable passes are divided into two parts by the slit provided from one end side to the other end side. A grommet that is cut as possible, and the grommet is installed with the outer periphery of the grommet being in close contact with the grommet installation part with the wiring cable inserted through the through hole, and tightened and deformed through the cover member. Since the introduction part of the cable to the inverter housing part is sealed, it is not necessary to insert the wiring cables one by one through the through holes of the grommet, and a plurality of cables can be simultaneously inserted into the through holes through the slits. The grommet is installed with the outer periphery closely attached to the grommet installation part of the inverter housing part, and through a cover member that seals the inverter housing part. By tightening deformed, it is possible to seal the inlet portion of the distribution cable watertight reduced in diameter through holes. Therefore, it is possible to facilitate the incorporation of the inverter device including the insertion of a plurality of wiring cables into the inverter housing portion and improve the productivity, and the wiring cable introduction portion to the inverter housing portion is securely sealed and waterproofed. Can increase the sex. In addition, since the grommet is tightened via the cover member fixed to the inverter accommodating portion, a tightening member is not required and the configuration can be simplified.

  Furthermore, the inverter-integrated electric compressor according to the present invention is the above-described inverter-integrated electric compressor, wherein the grommet is in close contact with the grommet installation portion via an unevenness or an O-ring provided between the grommet installation portion and the grommet installation portion. It is characterized by being.

  According to the present invention, since the grommet is in close contact with the grommet installation part via the unevenness or O-ring provided between the grommet and the grommet installation part, the grommet and the inverter housing part are tightened through the cover member. The grommet installation part can also be securely sealed in a watertight manner. Therefore, the reliability with respect to the waterproof property of the inverter accommodating portion can be further enhanced.

  Further, the inverter-integrated electric compressor according to the present invention is provided with an inverter housing portion whose opening can be sealed by a cover member on the outer periphery of the housing, and the inverter device is housed and installed in the inverter housing portion. In the inverter-integrated electric compressor in which a wiring cable penetrating the inverter housing portion is connected to the inverter device through a grommet, the grommet installing hole provided in the inverter housing portion, and the grommet installing hole A plurality of through-holes through which the wiring cable passes from one end to the other. A grommet that is cut in two minutes by a slit provided on the end side, and the tightening of the grommet A cover that covers an outer surface side of the flange portion and fastens and fixes the tightening flange portion to the inverter housing portion, and the grommet is installed in the grommet installation hole in a state where the wiring cable is inserted into the through hole. The introduction portion of the wiring cable into the inverter accommodating portion is sealed by being inserted into the cover and tightening and deforming the fastening collar portion via the cover.

  According to the present invention, the grommet installation hole provided in the inverter housing portion, the cylindrical portion that can be fitted into the grommet installation hole and tapered toward the tip, and the fastening collar provided at the base end thereof are provided. A grommet that has a plurality of through holes through which a wiring cable passes and is cut in a manner that can be divided into two by a slit provided from one end side to the other end side; A cover for tightening and fixing the tightening saddle to the inverter housing, and the grommet is fitted into the grommet installation hole with the wiring cable inserted through the through hole, and the tightening saddle is inserted through the cover. By tightening and deforming, the introduction part of the wiring cable to the inverter housing part is sealed, so that each wiring cable is inserted into the through-hole of the grommet one by one. It is not necessary to insert multiple grommets into the through-holes at the same time through slits, and the cylinder part of this grommet is inserted into the grommet installation hole of the inverter housing part, and the fastening collar part is inserted from the outer surface side through the cover. By tightening and deforming, the diameter of the through hole can be reduced and the introduction portion of the wiring cable can be sealed watertight. Therefore, it is possible to facilitate the incorporation of the inverter device including the insertion of a plurality of wiring cables into the inverter housing portion and improve the productivity, and the wiring cable introduction portion to the inverter housing portion is securely sealed and waterproofed. Can increase the sex. In addition, the grommet tightening collar is tightened with a dedicated cover, so that the cylinder can be uniformly and accurately deformed, and the wiring cable introduction section and the grommet and the installation hole can be securely connected. It can be sealed in a watertight state.

  Furthermore, the inverter-integrated electric compressor according to the present invention is the above-described inverter-integrated electric compressor, wherein the tubular portion having the tapered shape of the grommet is provided with a step portion at a predetermined dimension position from the base end thereof. It is characterized by.

  According to the present invention, since the stepped portion is provided at a predetermined size position from the base end of the cylindrical portion of the grommet that is tapered, the stepped portion is inserted into the grommet installation hole of the inverter housing portion, and on the inner surface side thereof. The grommet can be deformed and installed with the stepped portion in close contact. Thereby, the waterproof function by a grommet can be improved further.

  Furthermore, the inverter-integrated electric compressor according to the present invention is any one of the above-described inverter-integrated electric compressors, wherein the through-holes are provided in a plurality of rows for each plurality, and the plurality of through-holes in each row are provided. Are cut in two minutes through the slits, respectively.

  According to the present invention, the through holes are provided in a plurality of rows for each plurality, and the plurality of through holes in each row are cut so as to be able to be divided into two through the slits, so that the number of wiring cables is large. In this case, it is possible to cope with this by using a grommet having through holes provided in a plurality of rows, and a plurality of wiring cables can be simultaneously inserted into the through holes in each row from one end through a slit. it can. Therefore, even when the number of wiring cables differs depending on the specification of the control device on the vehicle side, it can be easily dealt with only by replacing the grommet.

  Furthermore, the inverter-integrated electric compressor of the present invention is characterized in that in any one of the above-described inverter-integrated electric compressors, the cover is either a resin cover or a metal cover.

  According to the present invention, since the cover is either a resin cover or a metal cover, conditions such as tightening strength, heat-resistant temperature, noise shielding, and cost are considered depending on the mounting environment of the electric compressor on the vehicle. Then, either a resin cover or a metal cover can be selected. Therefore, by selecting the metal cover, it is possible to obtain a high effect in any of the strength, heat-resistant temperature, and noise shielding for the resin cover. On the other hand, for the metal cover by selecting the resin cover, A cost reduction effect can be obtained.

  Furthermore, the inverter-integrated electric compressor according to the present invention is the above-described inverter-integrated electric compressor, wherein the cover has an outer surface opposite to a surface on which the tightening flange portion is tightened, outwardly. A steadying portion for the wiring cable protruding in a cylindrical shape so as to be gradually reduced is provided.

  According to the present invention, on the outer surface of the cover opposite to the surface to which the tightening collar is tightened, the steady portion for the wiring cable protruding in a cylindrical shape so as to be gradually reduced outward is provided. Therefore, vibration due to vibration of the wiring cable penetrating the grommet can be suppressed by the steadying portion provided in the cover. Accordingly, it is possible to prevent a decrease in waterproofness due to the vibration of the wiring cable, and it is possible to enhance the noise shielding effect by the cover because the cylindrical steadying portion is gradually reduced outward.

  According to the inverter-integrated electric compressor of the present invention, it is not necessary to insert the wiring cables into the through holes of the grommets one by one, and a plurality of the grommets can be simultaneously inserted into the through holes through the slits. The grommet is installed in close contact with the outer grommet installation part, and the inverter housing part is tightened and deformed through a cover member for sealing, thereby reducing the diameter of the through hole and sealing the wiring cable introduction part in a watertight manner. Therefore, it is possible to facilitate the incorporation of the inverter device including the insertion of a plurality of wiring cables into the inverter housing part, improve productivity, and securely seal the wiring cable introduction part to the inverter housing part. , Can improve waterproofness. In addition, since the grommet is tightened via the cover member fixed to the inverter accommodating portion, a tightening member is not required and the configuration can be simplified.

  Moreover, according to the inverter-integrated electric compressor of the present invention, it is not necessary to insert the wiring cables into the through holes of the grommets one by one, and a plurality of the cables can be simultaneously inserted into the through holes through the slits. Fit the cylinder part into the grommet installation hole of the inverter housing part, and tighten and deform the fastening collar from the outer surface through the cover, thereby reducing the diameter of the through hole and sealing the introduction part of the wiring cable in a watertight manner Therefore, it is possible to facilitate the incorporation of the inverter device including the insertion of a plurality of wiring cables into the inverter housing part, improve productivity, and securely seal the wiring cable introduction part to the inverter housing part. , Can improve waterproofness. In addition, the grommet tightening collar is tightened with a dedicated cover, so that the cylinder can be uniformly and accurately deformed, and the wiring cable introduction section and the grommet and the installation hole can be securely connected. It can be sealed in a watertight state.

1 is a side view of an inverter-integrated electric compressor according to a first embodiment of the present invention. It is a partial top view of the inverter accommodating part of the inverter integrated electric compressor shown in FIG. It is a perspective view of the inverter apparatus of the inverter integrated electric compressor shown in FIG. It is the block diagram (A) of the state which opened the slit of the grommet which wires the wiring cable connected to the inverter apparatus shown in FIG. 3, and the block diagram (B) of the closed state. It is a block diagram of the other example of the grommet which wires the wiring cable connected to the inverter apparatus shown in FIG. It is a cross-sectional view (A) and (B) which shows two installation states of the grommet shown in FIG. 4, FIG. They are the side view (A) and the longitudinal cross-sectional view (B) of the grommet installation part of the inverter integrated electric compressor which concern on 2nd Embodiment of this invention. It is the side view (A) of the modification of the grommet installation part which concerns on 2nd Embodiment shown in FIG. 7, and its longitudinal cross-sectional view (B). It is a longitudinal cross-sectional view of the grommet installation part of the inverter integrated electric compressor which concerns on 3rd Embodiment of this invention. It is a longitudinal cross-sectional view of the grommet installation part of the inverter integrated electric compressor which concerns on 4th Embodiment of this invention.

Embodiments according to the present invention will be described below with reference to the drawings.
[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 shows an external side view of the inverter-integrated electric compressor according to the first embodiment of the present invention, FIG. 2 shows a partial plan view of the inverter accommodating portion, and FIG. A schematic perspective view of the inverter device is shown.

  An inverter-integrated electric compressor 1 applied to a vehicle air conditioner includes a pressure-resistant structure housing 2 that constitutes an outer shell thereof. The pressure-resistant structure housing 2 is configured by integrally fastening and fixing a motor housing 3 in which an electric motor (not shown) is accommodated and a compressor housing 4 in which a compression mechanism (not shown) is accommodated with a bolt 5. . The motor housing 3 and the compressor housing 4 are made of aluminum die casting so that sufficient strength can be secured as a pressure vessel.

  An electric motor and a compression mechanism (not shown) built in the housing 2 are connected via a motor shaft (not shown) and are configured such that the compression mechanism is driven by the rotation of the electric motor. A refrigerant suction port 6 is provided on one end side (left side in FIG. 1) of the motor housing 3, and the low-temperature and low-pressure refrigerant gas sucked into the motor housing 3 from the refrigerant suction port 6 is around the electric motor. After being distributed along the motor axis L direction, it is sucked into the compression mechanism and compressed. The high-temperature and high-pressure refrigerant gas compressed by the compression mechanism is discharged into the compressor housing 4 and then sent out from the discharge port 7 provided on one end side (right side in FIG. 1) of the compressor housing 4. It is configured to be.

  The housing 2 is attached to a total of three legs, one at the lower end of the motor housing 3 (left side in FIG. 1) and two at the lower side of the compressor housing 4 and one at the upper side of the compressor housing 4. 8A, 8B, and 8C are provided. The inverter-integrated electric compressor 1 is mounted by mounting the mounting legs 8A, 8B, 8C on a side wall of a driving motor installed in the engine room of the vehicle via brackets and bolts. It is like that. In general, the inverter-integrated electric compressor 1 is often supported in a cantilevered state at three or four points in the vertical direction with its motor axis L direction directed in the front-rear direction or left-right direction of the vehicle via a fixed bracket.

  Further, the inverter housing portion 10 is integrally formed on the outer peripheral portion of the motor housing 3 at the upper portion thereof. The inverter accommodating portion 10 has a box structure surrounded by a peripheral wall having a predetermined height with the upper surface open, and the upper surface opening is screwed with a screw 11 or the like via a seal material (not shown). The cover member 12 is hermetically sealed in a watertight state. An inverter device 13 that converts DC power supplied from a high-voltage power source into three-phase AC power and supplies power to the electric motor is incorporated in the inverter accommodating portion 10, and the rotational speed of the electric compressor is determined according to the air conditioning load. It can be variably controlled. The inverter device 13 includes a high-voltage system component such as a smoothing capacitor, a normal mode coil, and a common mode coil (not shown) provided on the high voltage power supply line, and an inverter module 14.

  As shown in FIG. 3, the inverter module 14 is a power system board (not shown) made of an aluminum plate on which a known switching circuit composed of a plurality of semiconductor switching elements such as IGBTs not shown is mounted. And a power module 16 in which a resin case 15 is integrated by insert molding. In addition to the power system board, the resin case 15 is supplied with U-phase power supplied to the electric motor via a PN terminal 17 and a glass sealed terminal 18 (see FIG. 1) to which a high voltage power supply line is connected. The -V-W terminal 19, the ground 20 and the ground terminal 21, a large number of connection terminals 22 for connecting between the power system board and a CPU board 24, which will be described later, and the like are integrally formed by insert molding.

  The resin case 15 has a rectangular shape, and a PN terminal 17 protrudes on one side along the side surface of the inverter accommodating portion 10 where the power cable outlet is provided. The U-V-W terminal 19 protrudes on one side close to the side. In addition, a fixed leg portion 23 that is fastened and fixed to the bottom surface of the inverter accommodating portion 10 via a bolt is integrally formed at each corner portion of the resin case 15. The fixed leg portion 23 is provided with a ground terminal 21 through which a bolt can pass. By fixing the resin case 15 to the bottom surface of the inverter accommodating portion 9 via the bolt, a power system board and a CPU board 24 to be described later are provided. The ground is configured to be grounded to the housing.

  On the upper surface of the resin case 15 constituting the power module 16, a CPU board (printed board) 24 having the same outer dimensions as the resin case 15 is arranged in a state where it is connected to a number of connection terminals 22 and the ground 20. It is installed. The CPU board 24 is mounted with a known control communication circuit composed of an element that operates at a low voltage such as a CPU. Is configured to control the power system circuit (switching circuit) mounted on the power system board.

  The control communication circuit of the CPU board 24 and the host control device 25 are connected via a plurality (three to eight) of wiring cables 26 composed of low-voltage wires and communication wires. Since this wiring cable 26 is wired from the outside to the inverter device 13 installed in the inverter accommodating portion 10 having a sealed structure, the wiring cable 26 is penetrated into the inverter accommodating portion 10 via the grommet 28. The grommet 28 is installed in the grommet installation part 27 provided on the inverter accommodating part 10 sealed by the cover member 12 so as to cover the upper edge thereof, and is pressed by the cover member 12.

  As shown in FIG. 4 and FIG. 5, the grommet 28 has a grommet 28 </ b> A having eight through holes 29 when the number of the wiring cables 26 is eight, for example. A grommet 28B having three through holes 29 is used. A plurality of through holes 29 through which the wiring cables 26 of these grommets 28A and 28B are penetrated are severable by a slit 30 provided from one end side to the other end side, and the wiring cable 26 is inserted into the through hole 29. When inserting, the slit 30 is opened and the wiring cable 26 is sequentially inserted from one end side, so that a plurality of the wiring cables 26 can be inserted into the plurality of through holes 29 simultaneously. As shown in FIG. 4A, the slit 30 is provided so that the other end sides of the grommets 28A and 28B are not cut off.

  Further, when the number of through holes 29 is increased, as shown in FIG. 4, the plurality of through holes 29 are divided into a plurality of rows (two rows or two tiers). What is necessary is just to cut | disconnect by the slit 30 so that 2 minutes are possible. Further, the grommet 28 has a groove (concave portion) 31 formed on the outer periphery, and as shown in FIGS. 2 and 6, the convex portion 32 on the grommet installation portion 27 side is fitted, or an O-ring 33. Are configured to be fitted.

  The grommet 28 is fitted and installed in the grommet installation portion 27 in a state where the wiring cable 26 is inserted, and is pressed and deformed by tightening when the cover member 12 is fixed. Due to the deformation of the grommet 28, the diameter of the through hole 29 is reduced, the slit 30 is brought into close contact, and the introduction portion of the wiring cable 26 into the inverter accommodating portion 10 is sealed in a watertight state.

With the configuration described above, according to the present embodiment, the following operational effects can be obtained.
The inverter device 13 of the inverter-integrated electric compressor 1 is supplied with high-voltage DC power from a high-voltage power supply via a power cable (not shown). This DC power is noise-reduced by a high voltage system component such as a smoothing capacitor, then input to the PN terminal of the power module 16 and converted into a three-phase AC power of a predetermined frequency based on a control command by a switching circuit of the power system board. Converted. This three-phase alternating current power is fed from the U-V-W terminal 19 to the electric motor through the glass sealing terminal 18, and rotates the electric motor to operate the compression mechanism.

  The low-temperature and low-pressure refrigerant gas sucked into the motor housing 3 from the refrigerant suction port 6 by the operation of the compression mechanism flows around the electric motor along the direction of the motor axis L, and is then sucked into the compression mechanism and compressed. . The high-temperature and high-pressure refrigerant gas compressed by the compression mechanism is discharged into the compressor housing 4 and then sent out from the discharge port 7 to the outside. The low-temperature and low-pressure refrigerant gas flowing in the motor housing 3 in the direction of the motor axis L cools the electric motor in the meantime and is installed on the bottom surface of the inverter housing 10 via the wall surface of the motor housing 3. Heating components such as semiconductor switching elements mounted on the power system board of the device 13 are cooled.

  On the other hand, low voltage power and control signals are transmitted and transmitted to the control communication circuit on the CPU board 24 of the inverter device 13 from the upper control device 25 via a plurality of wiring cables 26. The control communication circuit is operated by the low voltage power and the control signal, and the inverter device 13 is driven and controlled. The inverter housing portion 10 in which the inverter device 13 is installed is sealed by the cover member 12 to ensure waterproofness, and the introduction portion of the wiring cable 26 is also sealed in a watertight state.

  In other words, the wiring cable 26 is penetrated into the inverter accommodating portion 10 through the grommet 28 disposed in the grommet installing portion 27 of the inverter accommodating portion 10 via the groove (concave portion) 31 and the convex portion 32 or the O-ring 33. The grommet 28 is fitted and installed in the grommet installation portion 27 in a state where the wiring cable 26 is inserted, and is tightened and deformed via the cover member 12 fixed to the inverter housing portion 10, thereby the through hole 29. Is reduced in diameter, and the slit 30 is brought into close contact with each other to seal the introduction portion of the wiring cable 26 into the inverter accommodating portion 10 in a watertight state.

  In addition, the grommet 28 has a plurality of through holes 29 provided corresponding to the number of the wiring cables 26 (the grommet 28A shown in FIG. 5, the grommet 28B has three through holes 29 arranged in a row.) However, since the grommet 28B is cut by the slit 30 so that it can be divided into two parts, a connector or the like is provided. When inserting the wiring cable 26, the plurality of wiring cables 26 can be simultaneously inserted into the plurality of through holes 29 by opening the slit 30 and sequentially inserting the wiring cable 26 from one end side. it can.

  Thus, according to the present embodiment, it is not necessary to insert a plurality of wiring cables 26 one by one into the through hole 29 of the grommet 28, and a plurality of wiring cables 26 are simultaneously inserted into the through hole 29 via the slit 30 from one end side. can do. Then, the grommet 28 is installed with the outer periphery closely attached to the grommet installation portion 27 of the inverter housing portion 10, and is tightened and deformed through the cover member 12 fixed to the inverter housing portion 10, thereby reducing the through hole 29. The slit 30 can be brought into close contact with the diameter. For this reason, it is possible to wire the wiring cable 26 by sealing the introduction portion of the wiring cable 26 into the inverter accommodating portion 10 in a watertight state.

  Therefore, the work of assembling the inverter device 13 into the inverter accommodating portion 10 including the work of inserting the wiring cable 26 into the through hole 29 of the grommet 28 can be facilitated, and the productivity can be improved. Moreover, the introduction part of the wiring cable 26 to the inverter accommodating part 10 can be reliably sealed in a watertight state, and waterproofness can be improved. Further, since the grommet 28 is tightened via the cover member 12 fixed to the inverter accommodating portion 10, a member for tightening is not required, and the configuration can be simplified.

  In addition, the grommet 28 is in close contact with the grommet installation part 27 via the unevenness provided between the grommet installation part 27, that is, the groove (concave part) 31 and the convex part 32, or the O-ring 33. For this reason, by tightening the grommet 28 via the cover member 12, the gap between the grommet 28 and the grommet installation portion 27 of the inverter accommodating portion 10 can be reliably sealed in a watertight manner. The reliability with respect to waterproofness can be further improved.

  Further, when the number of the wiring cables 26 is large, a plurality of through holes 29 of the grommets 28 are provided in a plurality of rows, and the plurality of through holes 29 in each row are cut by the slits 30 so as to be divided into two. This can be dealt with by using the grommets 28 </ b> A. Even in this case, a plurality of wiring cables 26 can be simultaneously inserted into the through holes 29 of each row from the one end side through the slits 30. Therefore, even when the number of the wiring cables 26 differs depending on the specification of the vehicle-side control device, it is possible to easily cope with the change by only replacing the grommet 28.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS.
The present embodiment is different from the first embodiment in the configuration of the grommet and the cover for fastening and fixing the grommet. Since other points are the same as those in the first embodiment, description thereof will be omitted.
This embodiment is applied when the grommet installation part of the inverter accommodating part 10 is comprised by the circular hole (refer the grommet installation hole 51 of FIG. 9). The grommet 40 includes a cylindrical portion 41 and a fastening collar portion 42 provided at the base end thereof.

  The cylindrical portion 41 has a taper of several degrees so that the diameter gradually decreases from the base end side toward the tip end side, and a plurality of (eight in this example) through-holes 43 are provided in the central portion. Are provided in three rows (three stages). A fastening collar 42 that is radially extended is provided at the base end of the cylindrical portion 41, and the clamping collar 42 is extended at a radial direction by 180 degrees so as to be opposed to each other at two locations. Bolt through holes 44 are provided. For the plurality of through holes 43 provided in the three rows of the grommets 40, slits 45 are provided from one end side to the other end side for each row, and the through holes 43 can be divided into two by this slit 45. Has been disconnected.

  The grommet 40 is configured such that a cylindrical portion 41 is fitted into a grommet installation hole 51 (see FIG. 9) of the inverter accommodating portion 10 and is fastened and fixed by a bolt 50 via covers 46A and 46B. The cover 46A is a resin cover, while the cover 46B is a metal (sheet metal) cover. The cover (resin cover) 46A and the cover (metal cover) 46B are formed in the same shape as the outer shape of the fastening collar portion 42 of the grommet 40, and are bent around the flange 47 and the wiring cable at the center, respectively. 26 is provided with a through hole 48, and a bolt through hole 49 for tightening is provided outside thereof.

  By using the grommet 40 configured as described above and the resin or metal cover 46A, 46B for fastening and fixing, first, the wiring cable 26 is passed through the through hole 48 of the cover 46A or 46B, and this wiring cable 26 is further passed. Are sequentially inserted through the through holes 43 of the grommets 40 through the slits 45, and the cylindrical portion 41 of the grommets 40 is inserted into the grommets installation holes 51 (see FIG. 9) of the inverter housing portion 10 using a taper. As a result, the wiring cable 26 can be wired in a penetrating manner with respect to the inverter accommodating portion 10.

  Thereafter, the grommet 40 can be fixed by tightening the outer surface side of the fastening collar portion 42 of the grommet 40 with the bolt 50 via the cover 46A or 46B, and the grommet 40 is deformed by tightening the cover 46A or 46B. Therefore, the diameter of the through hole 43 is reduced, the slit 45 is brought into close contact, and the cylindrical portion 41 is brought into close contact with the inner periphery of the grommet installation hole 51 (see FIG. 9). Thereby, the introduction part of the wiring cable 26 to the inverter accommodating part 10 can be reliably sealed in a watertight state. Therefore, according to this embodiment, the same effect as that of the first embodiment can be obtained.

  In the present embodiment, the cover is either a resin cover 46A or a metal cover 46B, and the conditions such as tightening strength, heat-resistant temperature, noise shielding, and cost are taken into account depending on the mounting environment of the electric compressor on the vehicle. Thus, either the resin cover 46A or the metal cover 46B can be selected. Therefore, by selecting the metal cover 46B, the resin cover 46A can be highly effective in any of strength, heat-resistant temperature, and noise shielding. On the other hand, by selecting the resin cover 46A, the metal cover 46A can be obtained. A cost reduction effect can be obtained with respect to 46B.

  In addition, the grommet installation hole provided in the inverter accommodating part 10 does not necessarily need to be a circular hole, and may be an ellipse, a polygon, etc. In this case, the cylindrical part 41 on the grommet 40 side is also a grommet installation hole. Needless to say, the cylindrical portion is shaped according to the shape.

[Third Embodiment]
Next, a third embodiment of the present invention will be described with reference to FIG.
This embodiment differs in the structure of the cylindrical part 41 in the grommet 40 with respect to above-described 2nd Embodiment. Since other points are the same as those of the second embodiment, description thereof will be omitted.
In the present embodiment, as shown in FIG. 9, the stepped portion 41 </ b> A is formed at a predetermined dimension position (a position corresponding to the wall thickness of the inverter accommodating portion 10) from the base end of the cylindrical portion 41 having a tapered shape of the grommet 40. It is set as the structure provided.

  As described above, the step portion 41A is provided at a predetermined dimensional position from the base end of the cylindrical portion 41 of the grommet 40, so that the step portion is formed in the grommet installation hole 51 of the inverter housing portion 10. The grommet 40 can be deformed and installed with the 41A inserted. As a result, as shown in FIG. 9, the stepped portion 41 </ b> A is in close contact with the inner surface side of the inverter accommodating portion 10, so that the waterproof function by the grommet 40 can be further improved.

[Fourth Embodiment]
Next, a fourth embodiment of the present invention will be described with reference to FIG.
The present embodiment is different from the above-described second and third embodiments in the configuration of a cover for fastening and fixing the grommet 40. Since other points are the same as those of the second embodiment, description thereof will be omitted.
In this embodiment, as shown in FIG. 10, the cover 46A or 46B protrudes in a cylindrical shape on the outer surface of the cover 46A or 46B opposite to the surface on which the tightening collar portion 42 is tightened so as to be gradually reduced outward. Further, the steadying portion 52 for the wiring cable 26 is integrally formed.

  As described above, since the cylindrical steady rest 52 for the wiring cable 26 is integrally provided on the outer surface of the cover 46A or 46B opposite to the surface to which the fastening collar 42 is fastened, the grommet 40 penetrates the cover 46A or 46B. The vibration due to the vibration of the connected wiring cable 26 can be suppressed by the cylindrical steadying portion 52 provided integrally with the cover 46A or 46B. Accordingly, it is possible to prevent a decrease in waterproofness due to vibration of the wiring cable 26, and the steadying portion 52 is gradually reduced outward in the direction of the through-hole 43, so that the noise shielding effect by the cover 46A or 46B. Can be increased.

  In addition, this invention is not limited to the invention concerning the said embodiment, In the range which does not deviate from the summary, it can change suitably. For example, in the above embodiment, the inverter housing portion 10 is integrally formed with the motor housing 3, but the inverter housing portion 10 may be formed separately from the motor housing 3. The configuration of the inverter device 13 is not limited to that of the above embodiment. Further, the outer shape of the grommets 28, 28A, 29B, and 40 can be appropriately changed.

DESCRIPTION OF SYMBOLS 1 Inverter integrated electric compressor 2 Housing 10 Inverter accommodating part 12 Cover member 13 Inverter apparatus 26 Wiring cable 27 Grommet installation part 28, 28A, 28B Grommet 29 Through-hole 30 Slit 31 Groove (concave part)
32 Convex part 33 O-ring 40 Grommet 41 Cylindrical part 41A Step part 42 Tightening collar part 43 Through hole 45 Slit 46A Cover (resin cover)
46B cover (metal cover)
51 Grommet installation hole 52 Anti-rest part

Claims (7)

An inverter housing portion having an opening that can be hermetically sealed by a cover member is provided on the outer periphery of the housing. The inverter device is housed and installed in the inverter housing portion, and the inverter housing portion is connected to the inverter device via a grommet. In the inverter-integrated electric compressor to which the penetrating wiring cable is connected,
A grommet installation portion provided on the inverter housing portion so as to cover the upper edge of the inverter housing portion and a plurality of through holes through which the wiring cable passes are cut into two portions by a slit provided from one end side to the other end side. A grommet, and
The grommet is installed in a state in which the outer periphery of the grommet is inserted into the through-hole in close contact with the grommet setting portion, and is tightened and deformed through the cover member, whereby the inverter accommodating portion of the wiring cable is provided. An inverter-integrated electric compressor characterized in that the introduction portion to the is sealed.   2. The inverter-integrated electric compressor according to claim 1, wherein the grommet is in close contact with the grommet installation part through unevenness or an O-ring provided between the grommet installation part and the grommet installation part. An inverter housing portion having an opening that can be hermetically sealed by a cover member is provided on the outer periphery of the housing. The inverter device is housed and installed in the inverter housing portion, and the inverter housing portion is connected to the inverter device via a grommet. In the inverter-integrated electric compressor to which the penetrating wiring cable is connected,
A grommet installation hole provided in the inverter accommodating portion, a cylindrical portion that can be fitted into the grommet installation hole and is tapered toward the tip, and a tightening flange provided at the base end thereof, A grommet in which a plurality of through holes through which the wiring cable penetrates are cut by a slit provided from one end side to the other end side, and covering an outer surface side of the fastening flange portion of the grommet; And a cover for tightening and fixing the tightening saddle to the inverter accommodating portion,
The grommet is inserted into the grommet installation hole in a state where the wiring cable is inserted into the through-hole, and the tightening flange is tightened and deformed through the cover, thereby moving the grommet to the inverter accommodating portion of the wiring cable. An inverter-integrated electric compressor characterized in that the introduction part of the inverter is sealed.   4. The inverter-integrated electric compressor according to claim 3, wherein a stepped portion is provided at a predetermined dimension position from the base end of the cylindrical portion of the grommet that is tapered. 5.   5. The through-holes are provided in a plurality of rows for each plurality, and the plurality of through-holes in each row are cut through the slits in two minutes. An inverter-integrated electric compressor according to any one of the above. The inverter-integrated electric compressor according to claim 3 or 4 , wherein the cover is a resin cover or a metal cover. The cover is provided with a steady portion for the wiring cable protruding in a cylindrical shape so as to be gradually reduced outwardly on the outer surface opposite to the surface on which the tightening collar is tightened. The inverter-integrated electric compressor according to any one of claims 3, 4, and 6 .

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