JP2022141075A - Motor compressor - Google Patents

Abstract

To provide a motor compressor which enables improvement of sealability of a seal member while inhibiting increase in a size of the motor compressor.SOLUTION: A grommet part 32 has an extension part 33 which extends in an axial direction of an insertion hole 60 farther than a packing part 31 and forms a part of the insertion hole 60. A seal member 30 has: first annular seal protrusions 41 which are formed so as to be continuous with the packing part 31 and the grommet part 32 and extend annularly; and first extension seal protrusions 42 which are formed at the extension part 33 so as to extend along the first annular seal protrusions 41. The seal member 30 has: second annular seal protrusions 51 which are formed so as to be continuous with the packing part 31 and the grommet part 32 and extend annularly; and second extension seal protrusions 52 which are formed at the extension part 33 so as to extend along the second annular seal protrusions 51.SELECTED DRAWING: Figure 4

Description

The present invention relates to an electric compressor.

The electric compressor includes a compression section that compresses fluid, an electric motor that drives the compression section, and an inverter that drives the electric motor. A housing of the electric compressor accommodates the compression section and the electric motor. In addition, the electric compressor includes an inverter cover that partitions and forms an inverter chamber that houses the inverter together with the housing. An annular seal member is interposed between the housing and the inverter cover.

By the way, as a sealing member, an annular packing portion for sealing between the housing and the inverter cover and a grommet portion formed with an insertion hole through which wiring electrically connected to the inverter is inserted are integrated. A formed one may be used. Such a sealing member is disclosed, for example, in Japanese Unexamined Patent Application Publication No. 2002-100001.

JP-A-2000-244142

By the way, when using such a sealing member, it is desired to improve the sealing performance between the housing and the inverter cover. Further, the shorter the seal length in the axial direction of the insertion hole in the grommet, the more difficult it is to maintain the airtightness between the grommet portion and the wiring, which may deteriorate the sealing performance between the wiring and the insertion hole. On the other hand, if the overall size of the seal member is increased in order to increase the seal length of the insertion hole in the axial direction, the size of the electric compressor will be increased. Therefore, it is desired to improve the sealing performance of the sealing member while suppressing the enlargement of the electric compressor.

An electric compressor for solving the above problems includes a compression section that compresses a fluid, an electric motor that drives the compression section, an inverter that drives the electric motor, a housing that accommodates the compression section and the electric motor, an inverter cover defining an inverter chamber that houses the inverter together with the housing; and an annular seal member interposed between the housing and the inverter cover, wherein the seal member is positioned between the housing and the inverter cover. and a grommet portion sealing between the housing and the inverter cover together with the packing portion and having an insertion hole through which wiring electrically connected to the inverter is inserted. The electric compressor is integrally formed, wherein the grommet portion has an extension portion that extends in the axial direction of the insertion hole from the packing portion and forms a part of the insertion hole, The sealing member is formed so as to extend annularly continuously from the packing portion and the grommet portion, and serves as a crushing margin when the packing portion and the grommet portion are in close contact with the housing; A first extension seal projection formed on the extension portion so as to extend along the first annular seal projection and serving as a crushing margin when the extension portion is in close contact with the housing, and is continuous with the packing portion and the grommet portion. a second annular seal projection formed so as to extend in an annular fashion and serving as a margin for crushing when the packing portion and the grommet portion are in close contact with the inverter cover; and the second annular seal projection extending along the second annular seal projection. and a second extension seal projection formed on the extension portion and serving as a margin for crushing when the extension portion is in close contact with the inverter cover.

According to this, when the packing portion and the grommet portion are in close contact with the housing, the crushing margin can be easily secured by the first annular seal projection. The first extended seal projection facilitates securing the crushing margin when the first extended seal projection is in close contact with the . In addition, the second annular seal protrusion can easily secure the crushing margin when the packing portion and the grommet portion are in close contact with the inverter cover. The second extended seal protrusion facilitates securing the crushing margin when the two parts are in close contact with each other. Therefore, the sealing performance of the seal member between the housing and the inverter cover is improved.

Furthermore, the axial sealing length of the insertion hole in the grommet portion is longer than in the case where the grommet portion does not have an extension portion. Then, in the grommet portion, the entire insertion hole is deformed by the restoring force that causes the first annular seal projection, the second annular seal projection, the first extended seal projection, and the second extended seal projection to collapse and return to their original shapes. is easily adhered to the wiring. Therefore, since the surface pressure of the insertion hole against the wiring is easily ensured, it is possible to improve the sealing performance between the wiring and the insertion hole. Here, since only the grommet portion of the seal member has the extended portion in order to lengthen the seal length in the axial direction of the insertion hole, an increase in size of the entire seal member is suppressed. Therefore, it is possible to improve the sealing performance of the sealing member while suppressing an increase in the size of the electric compressor.

In the above electric compressor, the seal member is provided integrally with a core material having higher rigidity than the seal member, and the core material is provided at least in the grommet portion except for the periphery of the insertion hole. , extending along the packing portion.

According to this, since the sealing member is provided integrally with the core material having higher rigidity than the sealing member, and the core material extends along the packing portion, the packing portion of the sealing member has a shape similar to that of the core material. It becomes easier to be defined by Therefore, it is possible to further improve the sealing performance of the packing portion. Since the core material extends along the packing part except for at least the periphery of the insertion hole in the grommet part, compared to the case where the core material is arranged around the insertion hole in the grommet part, The seal member around the insertion hole in the grommet portion is likely to be crushed. Therefore, in the grommet portion, the entire insertion hole is deformed by the restoring force that causes the first annular seal projection, the second annular seal projection, the first extended seal projection, and the second extended seal projection to collapse and return to their original shapes. easily adheres to the wiring. Therefore, the surface pressure of the insertion hole against the wiring can be easily ensured, and the sealing performance between the wiring and the insertion hole can be further improved.

In the above electric compressor, the inner peripheral surface of the insertion hole in a state before the wiring is inserted through the insertion hole is an arcuate surface that is arcuately uneven in the axial direction of the insertion hole, and the housing The first annular seal projection before coming into close contact with the housing has a square prism shape, the first extended seal projection before coming into close contact with the housing has a square column shape extending along the first annular seal projection, and the inverter cover The second annular seal projection before coming into close contact with the inverter cover preferably has a square prism shape, and the second extended seal projection before coming into close contact with the inverter cover preferably has a square column shape extending along the second annular seal projection.

The configuration in which the inner peripheral surface of the insertion hole is an arcuate surface that is arcuately uneven in the axial direction of the insertion hole is suitable as a configuration for improving the sealing performance between the wiring and the insertion hole, and the insertion hole is provided. This configuration is also suitable for molding the grommet portion. In addition, the configuration in which the first annular seal projection, the second annular seal projection, the first extended seal projection, and the second extended seal projection are each in the shape of a quadrangular prism improves the sealing performance of the seal member between the housing and the inverter cover. It is suitable as a configuration that allows

In the above electric compressor, the thickness of the grommet portion is thicker than the thickness of the packing portion, and the outer surface of the first annular seal projection is positioned on the first packing seal surface located on the packing portion and on the grommet portion. and a first grommet seal surface connecting the first flat surface, the first flat surface and the first packing seal surface and connecting the first flat surface to the first packing seal surface. a first connecting surface that extends arcuately so that the thickness of the grommet portion gradually decreases toward the first packing seal surface, and the outer surface of the first extended seal projection extends along the first flat surface. and a first extension surface extending along the first connection surface, wherein the outer surface of the second annular seal projection is a second packing seal surface located on the packing portion. and a second grommet seal surface located in the grommet portion, the second grommet seal surface connecting the second flat surface, the second flat surface, and the second packing seal surface. a second connecting surface extending arcuately so that the thickness of the grommet portion gradually decreases from the second flat surface toward the second packing seal surface, wherein the outer surface of the second extended seal projection is: It is preferable to have a second extended flat surface extending along the second flat surface and a second extended surface extending along the second connecting surface.

According to this, for example, compared to the case where the first connection surface, the first extension surface, the second connection surface, and the second extension surface each extend in the thickness direction of the grommet portion, the first connection surface and the While each 1st extension surface becomes easy to contact|adhere to a housing, each of a 2nd connection surface and a 2nd extension surface becomes easy to contact|adhere to an inverter cover. Therefore, it is possible to further improve the sealing performance between the housing and the inverter cover in the sealing member.

According to the present invention, it is possible to improve the sealing performance of the sealing member while suppressing an increase in the size of the electric compressor.

Sectional drawing which shows the electric compressor in embodiment. FIG. 2 is a plan view showing a state in which the motor housing is viewed from above, with a part broken away; The top view which shows the state which carried out the plan view of the inverter cover, partially breaking. (a) and (b) are enlarged perspective views showing the periphery of the grommet portion. Sectional drawing of a sealing member. Sectional drawing which shows a sealing member and a core material. FIG. 4 is a front view of a sealing member showing an enlarged periphery of a grommet portion;

An embodiment embodying an electric compressor will be described below with reference to FIGS. 1 to 7. FIG. The electric compressor of this embodiment is used, for example, in a vehicle air conditioner.
(Overall Configuration of Electric Compressor 10)
As shown in FIG. 1 , the electric compressor 10 includes a compressing section 11 , an electric motor 12 , an inverter 13 , a housing 14 and an inverter cover 15 . Compressor 11 compresses the refrigerant as a fluid. The compression unit 11 is, for example, a scroll type. The electric motor 12 drives the compression section 11 . Inverter 13 drives electric motor 12 . The housing 14 accommodates the compression section 11 and the electric motor 12 . Inverter cover 15 is connected to housing 14 .

(Configuration of housing 14)
Housing 14 has a motor housing 16 and a discharge housing 17 . The motor housing 16 and the discharge housing 17 are made of metal, for example aluminum. The housing 14 is therefore made of metal, for example aluminum.

The motor housing 16 is rectangular block-shaped. The motor housing 16 has a circular first chamber forming recess 16a. The first chamber-forming concave portion 16a extends from a first end surface 16b located on one side of the motor housing 16 in the longitudinal direction toward a second end surface 16c located on the other side in the longitudinal direction. The first chamber-forming concave portion 16a opens to the first end surface 16b. The first end face 16b is flat. The discharge housing 17 is in the shape of a square block. The discharge housing 17 has a circular first chamber-forming concave portion 17a. The first chamber-forming concave portion 17 a opens to the first end surface 17 b of the discharge housing 17 . The first end face 17b is flat.

The motor housing 16 and the discharge housing 17 are connected to each other with the first end face 16b of the motor housing 16 and the first end face 17b of the discharge housing 17 facing each other. The inside of the first chamber-forming recess 16a of the motor housing 16 and the inside of the first chamber-forming recess 17a of the discharge housing 17 communicate with each other. A first chamber 18 is defined by the first chamber forming recess 16 a of the motor housing 16 and the first chamber forming recess 17 a of the discharge housing 17 . A gasket 19 is interposed between the first end surface 16 b of the motor housing 16 and the first end surface 17 b of the discharge housing 17 . A gasket 19 seals between the first end face 16b of the motor housing 16 and the first end face 17b of the discharge housing 17. As shown in FIG. The electric motor 12 is housed inside a first chamber-forming recess 16 a of a motor housing 16 in a first chamber 18 . The compression part 11 is accommodated in the first chamber 18 closer to the discharge housing 17 than the electric motor 12 is.

The motor housing 16 has a second chamber forming recess 20 . The second chamber-forming concave portion 20 is formed on the first outer surface 16d, which is the outer surface of the motor housing 16 extending in the longitudinal direction. The second chamber-forming concave portion 20 has a square hole shape in plan view. Therefore, the first outer surface 16d has a quadrangular annular shape in plan view. The first outer surface 16d is flat. A first outer surface 16 d of the motor housing 16 has a hole forming recess 21 .

(Configuration of inverter cover 15)
The inverter cover 15 has a plate-like end wall 22 and a peripheral wall 23 projecting cylindrically from the outer peripheral portion of the end wall 22 . The peripheral wall 23 has a rectangular tubular shape. An end surface 23 a of the peripheral wall 23 extends along the first outer surface 16 d of the motor housing 16 . An end face 23a of the peripheral wall 23 is flat. An end face 23a of the peripheral wall 23 has a hole forming recess 24. As shown in FIG. The inverter cover 15 is connected to the first outer surface 16d of the motor housing 16 with the end surface 23a of the peripheral wall 23 and the first outer surface 16d of the motor housing 16 facing each other. The hole forming recess 21 of the motor housing 16 and the hole forming recess 24 of the inverter cover 15 face each other. The inverter cover 15 closes the opening of the second chamber forming recess 20 . An inverter chamber 25 is defined by the second chamber forming recess 20 and the inverter cover 15 . Therefore, the inverter cover 15 defines the inverter chamber 25 together with the motor housing 16 . The inverter room 25 accommodates the inverter 13 .

(Structure of seal member 30)
The electric compressor 10 has an annular seal member 30 . The sealing member 30 is made of rubber. The sealing member 30 is an elastic material. The seal member 30 is interposed between the first outer surface 16 d of the motor housing 16 and the end surface 23 a of the peripheral wall 23 of the inverter cover 15 . The sealing member 30 seals between the first outer surface 16 d of the motor housing 16 and the end surface 23 a of the peripheral wall 23 of the inverter cover 15 .

As shown in FIGS. 2 and 3, the sealing member 30 is formed by integrating a packing portion 31 and a grommet portion 32 . The packing portion 31 seals between a portion of the first outer surface 16 d of the motor housing 16 excluding the hole forming recess 21 and a portion of the end surface 23 a of the peripheral wall 23 of the inverter cover 15 excluding the hole forming recess 24 . The grommet portion 32 seals between the hole forming recess 21 of the motor housing 16 and the hole forming recess 24 of the inverter cover 15 . Therefore, the grommet portion 32 seals between the motor housing 16 and the inverter cover 15 together with the packing portion 31 .

Here, the direction in which the shortest line segment connecting the inner peripheral surface and the outer peripheral surface of the sealing member 30 when the sealing member 30 is viewed from the axial direction of the sealing member 30 is defined as the "width direction of the sealing member 30". . The thickness direction of the sealing member 30 is the axial direction of the sealing member 30 . The widthwise length of the sealing member 30 in the packing portion 31 is constant.

As shown in FIGS. 4A and 4B, the grommet portion 32 is thicker than the packing portion 31 . The grommet portion 32 has an extension portion 33 . The extension portion 33 extends in the width direction of the seal member 30 beyond the packing portion 31 . Therefore, the widthwise length of the sealing member 30 at the grommet portion 32 is longer than the widthwise length of the sealing member 30 at the packing portion 31 .

(Configuration of first annular seal projection 41 and first extended seal projection 42)
As shown in FIGS. 3, 4(b) and 5, the seal member 30 has three first annular seal projections 41. As shown in FIG. Each first annular seal projection 41 protrudes from the first seal outer surface 30a located on one side of the seal member 30 in the thickness direction. In addition, in FIG. 3, the first seal outer surface 30a is indicated by dot hatching. The amount of protrusion of each first annular seal projection 41 from the first seal outer surface 30 a is constant in the circumferential direction of the seal member 30 . The outer surface of each first annular seal projection 41 extends along the first seal outer surface 30a.

Each first annular seal projection 41 is formed to extend annularly continuously from the packing portion 31 and the grommet portion 32 . The three first annular seal projections 41 each extend annularly while being aligned in the width direction of the seal member 30 . The interval between the first annular seal projections 41 adjacent in the width direction of the seal member 30 is constant. Each first annular seal projection 41 serves as a crushing allowance when the packing portion 31 and the grommet portion 32 are brought into close contact with the first end face 16b of the motor housing 16 . Each first annular seal projection 41 before coming into close contact with the first end face 16b of the motor housing 16 has a quadrangular prism shape.

The seal member 30 has four first extended seal projections 42 . Each first elongated seal projection 42 protrudes from the first seal outer surface 30 a of the seal member 30 . Each first extended seal projection 42 is formed on the extension 33 so as to extend along the first annular seal projection 41 . The amount of protrusion of each first extended seal projection 42 from the first seal outer surface 30a is the same as the amount of protrusion of the first annular seal protrusion 41 from the first seal outer surface 30a. The outer surface of each first elongated seal projection 42 extends along the first seal outer surface 30a. The four first extended seal projections 42 extend along the first annular seal projection 41 while being aligned in the width direction of the seal member 30 . The interval between the first extended seal projections 42 adjacent in the width direction of the seal member 30 is constant. Each first extension seal projection 42 serves as a margin for crushing when the extension portion 33 is in close contact with the first end surface 16 b of the motor housing 16 . Each first extended seal projection 42 before coming into close contact with the first end surface 16b of the motor housing 16 has a quadrangular prism shape extending along the first annular seal projection 41 .

As shown in FIG. 4B, the outer surface of each first annular seal projection 41 includes a first packing seal surface 43 positioned on the packing portion 31 and a first grommet seal surface 44 positioned on the grommet portion 32. Each has. Each first grommet sealing surface 44 has a first planar surface 45 and a pair of first connecting surfaces 46, respectively. Each first flat surface 45 extends in a direction perpendicular to the thickness direction of the seal member 30 . Each first connection surface 46 connects the first flat surface 45 and the first packing seal surface 43 . Specifically, one of the pair of first connection surfaces 46 is a first end edge 451 located on one side of the seal member 30 in the circumferential direction on the first flat surface 45 and the seal member 30 on the first packing seal surface 43 . and a first edge 431 positioned on one side in the circumferential direction of the . The other of the pair of first connection surfaces 46 is a second edge 452 positioned on the other of the first flat surfaces 45 in the circumferential direction of the seal member 30 and the other of the seal member 30 on the first packing seal surface 43 in the circumferential direction. and the second edge 432 located at the . Each first connection surface 46 extends in an arc shape so that the thickness of the grommet portion 32 gradually decreases from the first flat surface 45 toward the first packing seal surface 43 .

The outer surface of each first elongated seal projection 42 has a first elongated flat surface 47 and a pair of first extended surfaces 48, respectively. Each first extended planar surface 47 extends along each first planar surface 45 . Each first extended flat surface 47 is located on the same plane as each first flat surface 45 . Each first extension surface 48 extends along each first connection surface 46 . Specifically, one of the pair of first extension surfaces 48 extends along one of the pair of first connection surfaces 46 . The other of the pair of first extension surfaces 48 extends along the other of the pair of first connection surfaces 46 .

(Structure of Second Annular Seal Projection 51 and Second Extended Seal Projection 52)
As shown in FIGS. 2, 4A and 5, the seal member 30 has three second annular seal projections 51. As shown in FIGS. Each second annular seal projection 51 protrudes from the second seal outer surface 30b located on the other side of the seal member 30 in the thickness direction. In addition, in FIG. 2, the second seal outer surface 30b is indicated by dot hatching. The amount of protrusion of each second annular seal projection 51 from the second seal outer surface 30 b is constant in the circumferential direction of the seal member 30 . The outer surface of each second annular seal projection 51 extends along the second seal outer surface 30b.

Each second annular seal projection 51 is formed to extend annularly continuously from the packing portion 31 and the grommet portion 32 . The three second annular seal projections 51 each extend annularly while being aligned in the width direction of the seal member 30 . The interval between the second annular seal projections 51 adjacent in the width direction of the seal member 30 is constant. Each second annular seal projection 51 serves as a crushing margin when the packing portion 31 and the grommet portion 32 are in close contact with the end surface 23 a of the peripheral wall 23 of the inverter cover 15 . Each of the second annular seal projections 51 before coming into close contact with the end face 23a of the peripheral wall 23 of the inverter cover 15 has a quadrangular prism shape.

The seal member 30 has four second extended seal projections 52 . Each second extended seal projection 52 protrudes from the second seal outer surface 30 b of the seal member 30 . Each second extended seal projection 52 is formed on the extension portion 33 so as to extend along the second annular seal projection 51 . The amount of protrusion of each second extended seal projection 52 from the second seal outer surface 30b is the same as the amount of protrusion of the second annular seal protrusion 51 from the second seal outer surface 30b. The outer surface of each second extended seal projection 52 extends along the second seal outer surface 30b. The four second extended seal projections 52 extend along the second annular seal projection 51 while being aligned in the width direction of the seal member 30 . The interval between the second extended seal projections 52 adjacent in the width direction of the seal member 30 is constant. Each of the second extension seal protrusions 52 serves as a crushing margin when the extension portion 33 is in close contact with the end surface 23 a of the peripheral wall 23 of the inverter cover 15 . Each second extended seal projection 52 before coming into close contact with the end face 23 a of the peripheral wall 23 of the inverter cover 15 has a quadrangular prism shape extending along the second annular seal projection 51 .

As shown in FIG. 4( a ), the outer surface of each second annular seal projection 51 includes a second packing seal surface 53 located on the packing portion 31 and a second grommet seal surface 54 located on the grommet portion 32 . Each has. Each second grommet sealing surface 54 has a second planar surface 55 and a pair of second connecting surfaces 56, respectively. Each second flat surface 55 extends in a direction perpendicular to the thickness direction of the seal member 30 . Each second connection surface 56 connects the second flat surface 55 and the second packing seal surface 53 . Specifically, one of the pair of second connection surfaces 56 is a first end edge 551 located on one side of the seal member 30 in the circumferential direction on the second flat surface 55 and the seal member 30 on the second packing seal surface 53 . and a first edge 531 positioned on one side in the circumferential direction of the . The other of the pair of second connection surfaces 56 is a second edge 552 located on the other of the second flat surfaces 55 in the circumferential direction of the seal member 30 and the other of the second packing seal surfaces 53 in the circumferential direction of the seal member 30 . and the second edge 532 located at the . Each second connection surface 56 extends arcuately so that the thickness of the grommet portion 32 gradually decreases from the second flat surface 55 toward the second packing seal surface 53 .

The outer surface of each second extended seal projection 52 has a second extended flat surface 57 and a pair of second extended surfaces 58, respectively. Each second extended planar surface 57 extends along each second planar surface 55 . Each second extended flat surface 57 is located on the same plane as each second flat surface 55 . Each second extension surface 58 extends along each second connection surface 56 . Specifically, one of the pair of second extension surfaces 58 extends along one of the pair of second connection surfaces 56 . The other of the pair of second extension surfaces 58 extends along the other of the pair of second connection surfaces 56 .

(Configuration of insertion hole 60)
As shown in FIGS. 4( a ) and 4 ( b ), the grommet portion 32 has two insertion holes 60 . The axial directions of the insertion holes 60 are aligned with each other. The axial direction of each insertion hole 60 coincides with the width direction of the seal member 30 . The extension 33 forms part of each insertion hole 60 . Therefore, the extension portion 33 extends in the axial direction of each insertion hole 60 more than the packing portion 31 . The axial sealing length of each insertion hole 60 in the grommet portion 32 is longer than the widthwise length of the sealing member 30 in the packing portion 31 . A wiring 70 electrically connected to the inverter 13 is inserted through each insertion hole 60 .

The two insertion holes 60 are formed in the grommet portion 32 such that the respective axes of the insertion holes 60 are aligned in the circumferential direction of the seal member 30 . One of the two insertion holes 60 is located near the first edge 431 of the first packing seal surface 43 and the first edge 531 of the second packing seal surface 53 in the grommet portion 32 . The other of the two insertion holes 60 is positioned closer to the second edge 432 of the first packing seal surface 43 and the second edge 532 of the second packing seal surface 53 in the grommet portion 32 .

As shown in FIG. 5 , the inner peripheral surface of each insertion hole 60 before the wiring 70 is inserted through the insertion hole 60 is an arcuate surface that is arcuately uneven in the axial direction of each insertion hole 60 . . The inner peripheral surface of each insertion hole 60 is uneven so that there are three convex portions and two concave portions in the axial direction of each insertion hole 60 . The inner peripheral surface of each insertion hole 60 is formed such that a convex portion and a concave portion are alternately continuous in the axial direction of each insertion hole 60 .

(Structure of core material 65)
As shown in FIG. 6, the sealing member 30 is provided integrally with a metallic core member 65 . The core material 65 is made of stainless steel, for example. The core material 65 has higher rigidity than the seal member 30 . The core material 65 is in the shape of a thin flat plate. The core material 65 is in the shape of a non-annular belt. The sealing member 30 and the core material 65 are integrally provided by, for example, insert molding. The core member 65 extends along the packing portion 31 except for at least the periphery of the insertion hole 60 in the grommet portion 32 .

As shown in FIG. 7 , a first end portion 651 , which is one end portion of the seal member 30 in the circumferential direction of the core member 65 , extends between the first edge 431 of the first packing seal surface 43 and the second packing seal surface 53 is embedded in the grommet portion 32 so as to protrude slightly toward the grommet portion 32 from the first edge 531 of the grommet portion 32 . A first end portion 651 of the core member 65 is centered on one of the axes of the two insertion holes 60 and extends along one of the pair of first connection surfaces 46 on the first seal outer surface 30a. It is positioned inside an imaginary circle C<b>1 passing through each portion extending along one side of the second connection surface 56 .

A second end portion 652 , which is the other end portion in the circumferential direction of the seal member 30 in the core member 65 , is positioned closer to the second end edge 432 of the first packing seal surface 43 and the second end edge 532 of the second packing seal surface 53 . also protrudes slightly toward the grommet portion 32 and is embedded inside the grommet portion 32 . The second end portion 652 of the core member 65 is centered on the axis of the other of the two insertion holes 60 and extends along the other of the pair of first connection surfaces 46 on the first seal outer surface 30a. It is positioned inside an imaginary circle C2 passing through each portion extending along the other side of the second connection surface 56 .

(action)
Next, the operation of this embodiment will be described.
The first annular seal protrusions 41 can easily secure a crushing margin when the packing portion 31 and the grommet portion 32 are in close contact with the first end surface 16 b of the motor housing 16 . The first extended seal protrusions 42 can easily ensure the crushing margin when the end surface 16b is in close contact with the end surface 16b. In addition, the second annular seal protrusions 51 can easily secure a crushing margin when the packing portion 31 and the grommet portion 32 are in close contact with the end face 23a of the peripheral wall 23 of the inverter cover 15. The second extended seal protrusions 52 can easily secure a crushing margin when the outer peripheral wall 23 is brought into close contact with the end surface 23 a of the peripheral wall 23 . Therefore, the sealing performance of the seal member 30 between the motor housing 16 and the inverter cover 15 is improved.

Furthermore, compared to a configuration in which the grommet portion 32 does not have the extension portion 33, the axial sealing length of each insertion hole 60 in the grommet portion 32 is longer. Then, in the grommet portion 32, each of the first annular seal projections 41, each of the second annular seal projections 51, each of the first extension seal projections 42, and each of the second extension seal projections 52 is crushed and tries to return to its original shape. With the restoring force, the whole of each insertion hole 60 is likely to come into close contact with each wiring 70 . Therefore, the surface pressure of each insertion hole 60 against each wire 70 is easily ensured, and the sealing performance between each wire 70 and each insertion hole 60 is improved.

(effect)
The following effects can be obtained in the above embodiment.
(1) The grommet portion 32 has an extension portion 33 . The seal member 30 has a first annular seal projection 41 , a first extended seal projection 42 , a second annular seal projection 51 and a second extended seal projection 52 . According to this, the first annular seal projection 41 easily secures the crushing margin when the packing portion 31 and the grommet portion 32 are in close contact with the motor housing 16, and furthermore, the grommet portion 32 has the extension portion 33. Even so, the first extended seal projection 42 can easily secure the crushing margin when the extended portion 33 is brought into close contact with the motor housing 16 . In addition, the second annular seal projection 51 can easily secure the crushing margin when the packing portion 31 and the grommet portion 32 are in close contact with the inverter cover 15. The second extension seal projection 52 facilitates securing the crushing margin when the extension portion 33 is brought into close contact with the inverter cover 15 . Therefore, the sealing performance between the motor housing 16 and the inverter cover 15 in the seal member 30 is improved.

Furthermore, compared to a configuration in which the grommet portion 32 does not have the extension portion 33, the axial seal length of the insertion hole 60 in the grommet portion 32 is longer. Then, in the grommet portion 32, the first annular seal projection 41, the second annular seal projection 51, the first extension seal projection 42, and the second extension seal projection 52 are each crushed and are restored to their original shapes by the restoring force. Therefore, the entire insertion hole 60 is easily brought into close contact with the wiring 70 . Therefore, since the surface pressure of the insertion hole 60 against the wiring 70 is easily ensured, the sealing performance between the wiring 70 and the insertion hole 60 can be improved. Here, in the seal member 30, only the grommet portion 32 has the extended portion 33 in order to lengthen the seal length of the insertion hole 60 in the axial direction. It is Therefore, it is possible to improve the sealing performance of the seal member 30 while suppressing an increase in the size of the electric compressor 10 .

(2) Since the sealing member 30 is provided integrally with the core member 65 having higher rigidity than the sealing member 30 and the core member 65 extends along the packing portion 31, the packing portion 31 of the sealing member 30 is is easily defined by the core material 65 . Therefore, the sealing performance of the packing portion 31 can be further improved. Since the core member 65 extends along the packing portion 31 except at least the periphery of the insertion hole 60 in the grommet portion 32, the core member 65 is arranged around the insertion hole 60 in the grommet portion 32. The seal member 30 around the insertion hole 60 in the grommet portion 32 is more likely to be crushed than when the grommet portion 32 is closed. Therefore, in the grommet portion 32, the first annular seal projection 41, the second annular seal projection 51, the first extended seal projection 42, and the second extended seal projection 52 are each crushed and are restored to their original shapes by the restoring force. As a result, the entire insertion hole 60 is easily brought into close contact with the wiring 70 . Therefore, the surface pressure of the insertion hole 60 against the wiring 70 can be easily ensured, and the sealing performance between the wiring 70 and the insertion hole 60 can be further improved.

(3) The configuration in which the inner peripheral surface of the insertion hole 60 is an arcuate surface that is arcuately uneven in the axial direction of the insertion hole 60 is suitable as a configuration for improving the sealing performance between the wiring 70 and the insertion hole 60 . In addition, it is a suitable configuration for molding the grommet portion 32 having the insertion hole 60 . Further, the first annular seal projection 41 , the second annular seal projection 51 , the first extension seal projection 42 , and the second extension seal projection 52 are each shaped like a quadrangular prism. It is suitable as a configuration for improving the sealing performance between.

(4) The first grommet seal surface 44 has a first connection surface 46 extending arcuately so that the thickness of the grommet portion 32 gradually decreases from the first flat surface 45 toward the first packing seal surface 43 . there is The outer surface of the first elongated seal projection 42 has a first extension surface 48 extending along the first connecting surface 46 . The second grommet seal surface 54 has a second connection surface 56 extending arcuately so that the thickness of the grommet portion 32 gradually decreases from the second flat surface 55 toward the second packing seal surface 53 . The outer surface of the second extended seal projection 52 has a second extension surface 58 extending along the second connection surface 56 . According to this, for example, compared to the case where the first connection surface 46, the first extension surface 48, the second connection surface 56, and the second extension surface 58 each extend in the thickness direction of the grommet portion 32, The first connection surface 46 and the first extension surface 48 are easily brought into close contact with the motor housing 16 , and the second connection surface 56 and the second extension surface 58 are easily brought into close contact with the inverter cover 15 . Therefore, the sealing performance between the motor housing 16 and the inverter cover 15 in the sealing member 30 can be further improved.

(5) The amount of protrusion of each first extended seal projection 42 from the first seal outer surface 30a is the same as the amount of protrusion of the first annular seal protrusion 41 from the first seal outer surface 30a. The amount of protrusion of each second extended seal projection 52 from the second seal outer surface 30b is the same as the amount of protrusion of the second annular seal protrusion 51 from the second seal outer surface 30b. According to this, in the grommet portion 32, the first annular seal projection 41, the second annular seal projection 51, the first extension seal projection 42, and the second extension seal projection 52 are crushed and restored to their original shapes. As the force is applied, the entire insertion hole 60 is likely to come into close contact with the wiring 70 with a uniform surface pressure. Therefore, the sealing performance between the wiring 70 and the insertion hole 60 can be further improved.

(Change example)
It should be noted that the above embodiment can be implemented with the following modifications. The above embodiments and the following modifications can be combined with each other within a technically consistent range.

(circle) in embodiment, the core material 65 may be integrally provided with the sealing member 30 so that it may also extend around each insertion hole 60 in the grommet part 32 .
O In the embodiment, the first end 651 of the core material 65 may be located outside the virtual circle C1.

(circle) in embodiment, the 2nd edge part 652 of the core material 65 may be located in the outer side of the imaginary circle C2.
O In the embodiment, the core material 65 may not be made of metal, and may be made of resin, for example. For example, when the core material 65 is made of resin, the core material 65 needs to be made of a resin having higher rigidity than the seal member 30 . In short, the material of the core material 65 is not particularly limited as long as it has higher rigidity than the seal member 30 .

(circle) in embodiment, the sealing member 30 does not need to be provided integrally with the core material 65. FIG. In short, the electric compressor 10 may have a configuration in which the core member 65 is omitted.
○ In the embodiment, the inner peripheral surface of the insertion hole 60 may be uneven such that there are two convex portions and one concave portion in the axial direction of each insertion hole 60. . Even in this case, the inner peripheral surface of the insertion hole 60 is formed so that the convex portion and the concave portion are alternately continuous in the axial direction of each insertion hole 60 . In short, the number of convex portions in the axial direction of each insertion hole 60 is not particularly limited.

O In the embodiment, the inner peripheral surface of the insertion hole 60 may be, for example, a labyrinth-shaped uneven surface in the axial direction of the insertion hole 60 .
O In the embodiment, the inner peripheral surface of the insertion hole 60 may not be an arcuate surface that is arcuately uneven in the axial direction of the insertion hole 60 . For example, the inner peripheral surface of the insertion hole 60 may be cylindrical extending straight around the axis of the insertion hole 60 .

(circle) in embodiment, the number of the 1st cyclic|annular sealing projections 41 is not specifically limited, For example, it may be two.
(circle) in embodiment, the number of the 2nd cyclic|annular sealing projections 51 is not specifically limited, For example, it may be two.

O In the embodiment, the number of the first extended seal projections 42 is not particularly limited, and may be two or three, for example.
O In the embodiment, the number of the second extended seal projections 52 is not particularly limited, and may be two or three, for example.

O In the embodiment, the amount of protrusion of each first extended seal projection 42 from the first seal outer surface 30a may be different from the amount of protrusion of the first annular seal protrusion 41 from the first seal outer surface 30a.

O In the embodiment, the amount of protrusion of each second extended seal protrusion 52 from the second seal outer surface 30b may be different from the amount of protrusion of the second annular seal protrusion 51 from the second seal outer surface 30b.

(circle) in embodiment, the space|interval of the 1st cyclic|annular sealing projection 41 comrades adjacent in the width direction of the sealing member 30 may not be constant.
(circle) in embodiment, the space|interval of the 1st extended seal|sticker protrusion 42 comrades adjacent in the width direction of the sealing member 30 may not be constant.

(circle) in embodiment, the space|interval of the 2nd cyclic|annular sealing projection 51 comrades adjacent in the width direction of the sealing member 30 may not be constant.
(circle) in embodiment, the space|interval of the 2nd extended seal|sticker protrusion 52 comrades adjacent in the width direction of the sealing member 30 may not be constant.

O In the embodiment, each of the first annular seal projection 41, the second annular seal projection 51, the first extended seal projection 42, and the second extended seal projection 52 does not have to be square prism-shaped. For example, the shape of each of the first annular seal projection 41, the second annular seal projection 51, the first extension seal projection 42, and the second extension seal projection 52 may be, for example, a semi-cylindrical shape. In short, the shapes of the first annular seal projection 41, the second annular seal projection 51, the first extension seal projection 42, and the second extension seal projection 52 are not particularly limited.

O In the embodiment, the number of insertion holes 60 formed in the grommet portion 32 is not limited to two, and may be, for example, three. In short, the number of insertion holes 60 formed in the grommet portion 32 is not particularly limited.

O In the embodiment, for example, the first connection surface 46 , the first extension surface 48 , the second connection surface 56 , and the second extension surface 58 may each extend in the thickness direction of the grommet portion 32 .
(circle) in embodiment, the compression part 11 may be not only a scroll type but a piston type, a vane type, etc., for example.

○ In the embodiment, the electric compressor 10 is used in a vehicle air conditioner, but the present invention is not limited to this. The air may be compressed by the compressing section 11 .

DESCRIPTION OF SYMBOLS 10... Electric compressor, 11... Compression part, 12... Electric motor, 13... Inverter, 14... Housing, 15... Inverter cover, 25... Inverter chamber, 30... Seal member, 31... Packing part, 32... Grommet part, 33 ... Extension portion 41 ... First annular seal projection 42 ... First extension seal projection 43 ... First packing seal surface 44 ... First grommet seal surface 45 ... First flat surface 46 ... First connection surface 47... First extended flat surface 48... First extended surface 51... Second annular seal projection 52... Second extended seal projection 53... Second packing seal surface 54... Second grommet seal surface 55... Second flat surface 56 Second connection surface 57 Second extension flat surface 58 Second extension surface 60 Insertion hole 65 Core member 70 Wiring.

Claims (4)

a compression section for compressing a fluid;
an electric motor that drives the compression unit;
an inverter that drives the electric motor;
a housing that accommodates the compression unit and the electric motor;
an inverter cover that partitions and forms an inverter chamber that houses the inverter together with the housing;
an annular seal member interposed between the housing and the inverter cover,
The sealing member is
a packing portion that seals between the housing and the inverter cover;
and a grommet portion that seals between the housing and the inverter cover together with the packing portion and has an insertion hole through which wiring electrically connected to the inverter is inserted. machine and
The grommet portion has an extension portion that extends in the axial direction of the insertion hole from the packing portion and forms a part of the insertion hole,
The sealing member is
a first annular seal projection formed so as to extend annularly continuously from the packing portion and the grommet portion, and serving as a crushing margin when the packing portion and the grommet portion are in close contact with the housing;
a first extension seal projection formed on the extension portion so as to extend along the first annular seal projection and serving as a crushing margin when the extension portion comes into close contact with the housing;
a second annular seal projection formed so as to extend annularly continuously from the packing portion and the grommet portion, and serving as a crushing margin when the packing portion and the grommet portion are in close contact with the inverter cover;
a second extended seal projection formed on the extended portion so as to extend along the second annular seal projection and serving as a margin for crushing when the extended portion comes into close contact with the inverter cover. and electric compressor. The sealing member is provided integrally with a core material having higher rigidity than the sealing member,
2. The electric compressor according to claim 1, wherein the core member extends along the packing portion except for at least a periphery of the insertion hole in the grommet portion. The inner peripheral surface of the insertion hole in a state before the wiring is inserted through the insertion hole is an arcuate surface that is arcuately uneven in the axial direction of the insertion hole,
The first annular seal projection before being in close contact with the housing has a quadrangular prism shape,
The first extended seal projection before coming into close contact with the housing has a quadrangular prism shape extending along the first annular seal projection,
The second annular seal projection before being brought into close contact with the inverter cover has a quadrangular prism shape,
3. The electric compressor according to claim 1, wherein the second extended seal projection before coming into close contact with the inverter cover has a quadrangular prism shape extending along the second annular seal projection. The thickness of the grommet portion is thicker than the thickness of the packing portion,
the outer surface of the first annular seal projection has a first packing seal surface positioned on the packing portion and a first grommet seal surface positioned on the grommet portion;
The first grommet seal surface connects the first flat surface and the first packing seal surface, and the grommet portion extends from the first flat surface toward the first packing seal surface. a first connecting surface extending arcuately so that the thickness gradually decreases;
an outer surface of the first extension seal projection has a first extension flat surface extending along the first flat surface and a first extension surface extending along the first connection surface;
the outer surface of the second annular seal projection has a second packing seal surface positioned on the packing portion and a second grommet seal surface positioned on the grommet portion;
The second grommet seal surface connects a second flat surface and the second flat surface and the second packing seal surface, and the grommet portion extends from the second flat surface toward the second packing seal surface. a second connecting surface extending arcuately so that the thickness gradually decreases;
The outer surface of the second extension seal projection has a second extension flat surface extending along the second flat surface and a second extension surface extending along the second connection surface. The electric compressor according to any one of claims 1 to 3.

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