JP6589680B2 - Rotating electric machine - Google Patents

Description

  The present invention relates to a rotating electrical machine used as an electric motor or a generator in a vehicle, for example.

  Conventionally, for example, as a rotating electrical machine mounted and used in a vehicle, a housing having a coolant flow path and a coolant transport member having one end fitted and fixed to the housing and fixed to the other end are connected to the housing. A connecting member is generally known. In this rotating electrical machine, when the housing and the connection member are fitted and fixed, techniques such as press fitting and gap fitting are employed. The fitting and fixing part of the two members is filled with a resin such as an adhesive in order to ensure the airtightness of the minute gap formed in press fitting or the gap formed in gap fitting. Or applied. Patent Document 1 discloses a method of joining two pipes using an anaerobic adhesive for fitting and fixing cylindrical members made of different materials.

JP-A-6-330953

  By the way, in the rotating electrical machine described above, when the anaerobic adhesive disclosed in Patent Document 1 is used for a gap or a space formed in a fitting and fixing portion between the housing and the connecting member, the housing and the connecting member are used. The effect of increasing the initial fixing force can be expected. However, when exposed to a corrosive environment due to long-term use, corrosion of the fitting and fixing part may progress due to corrosive liquid such as salt water entering from the gap of the fitting and fixing part, leading to a decrease in strength.

  Therefore, in Patent Document 1, a protrusion (air blocking means) for blocking contact between the adhesive and air and a recess for filling the adhesive are provided on the bonding surfaces of the two members to be bonded. Yes. However, even if the concave portion is initially filled with adhesive, if there is a difference in the coefficient of thermal expansion between the two members to be joined, the adhesive surface peels off due to thermal stress, and the corrosive liquid is inserted into the fitting fixing portion. A path to enter the network will be formed. In particular, since the rotating electrical machine becomes a high temperature environment due to heat generation of the windings when the operation is started, the adhesion surface is easily peeled off due to thermal stress.

  The present invention has been made in view of the above circumstances, and prevents the invasion of corrosive liquid by suppressing the peeling of the adhesive surface caused by the difference in the coefficient of thermal expansion between the two members to be fitted and fixed. It is an object to be solved to provide a rotating electrical machine that can obtain corrosion resistance.

The present invention made to solve the above problems
A housing (10) having a coolant flow passage (14), a connection member (40) having one end fitted and fixed to the housing and having a communication space (41) with the flow passage, and the housing and the connection In the rotating electrical machine (1) provided with a space portion (16) formed on the surface of the housing and the connection member in a fitting fixing portion with a member,
The connecting member has an annular flange projecting outward from the outer peripheral surface;
The housing is chamfered at the opening on the outer peripheral surface side of the introduction port (15) to which the connection member is fitted and fixed,
In the fitting and fixing portion between the housing and the connection member, a space formed by the introduction port of the housing, an outer peripheral surface on one end side of the connection member, and a surface on one end side of the flange portion ( 16) is formed,
The space is filled with a cellular resin (45) formed of an anaerobic adhesive and containing bubbles (45a).

  According to this configuration, the space resin formed by the surfaces of the housing and the connection member in the fitting and fixing portion between the housing and the connection member is filled with the bubble resin containing bubbles. As a result, when the environmental temperature rises due to the heat generated by the windings, the gap between the housing and the connecting member increases due to the difference in the thermal expansion coefficient between the housing and the connecting member. At this time, since the bubble resin contains bubbles, it is easier to extend than a resin that does not contain bubbles, so the stress at which the bubble resin and the bonding surface of the housing, and the bonding surface of the bubble resin and the connecting member peel off, Since it is relieved by the thermal expansion force of the air bubbles contained in the air bubble resin, peeling of the adhesive surface is effectively suppressed. As a result, it is possible to reliably prevent the corrosive liquid from entering the fitting and fixing portion, so that a good corrosion resistance effect can be obtained.

  In addition, the code | symbol in the parenthesis after each member and site | part described in this column and the claim shows the correspondence with the specific member and site | part described in embodiment mentioned later, and is a patent. It does not affect the configuration of each claim described in the claims.

FIG. 3 is an axial sectional view showing a half in the radial direction of the rotating electrical machine according to the first embodiment. It is the expanded sectional view which expanded the A section of FIG. It is the expanded sectional view which expanded the B section of FIG. FIG. 3 is an explanatory diagram showing a state before the housing is thermally expanded in the rotating electrical machine of the first embodiment. FIG. 6 is an explanatory view showing a state after the housing has thermally expanded in the rotating electrical machine of the first embodiment. It is explanatory drawing which shows the state before a housing thermally expands in the rotary electric machine of the comparative example 1. It is explanatory drawing which shows the state after a housing thermally expands in the rotary electric machine of the comparative example 1. FIG. 5 is an enlarged cross-sectional view of a portion corresponding to FIG. 4 of the rotating electrical machine of the second embodiment. FIG. 5 is an enlarged cross-sectional view of a portion corresponding to FIG. 4 of the rotating electrical machine of the third embodiment. It is an expanded sectional view of the fitting fixing part of the housing and connection member of the rotary electric machine of Embodiment 3. FIG. 5 is an enlarged cross-sectional view of a portion corresponding to FIG. 4 of the rotating electrical machine of the fourth embodiment.

  Hereinafter, embodiments of the rotating electrical machine of the present invention will be specifically described with reference to the drawings.

Embodiment 1
The rotating electrical machine 1 of Embodiment 1 is mounted on a vehicle and used as an electric motor. As shown in FIG. 1, the rotating electrical machine 1 includes a housing 10 having a coolant flow passage 14, a rotating shaft 20 rotatably supported by the housing 10 via a pair of bearings 21 and 22, A rotor 25 fixed to the outer peripheral surface of the shaft 20, a stator 30 disposed radially opposite the rotor 25, and one end of the housing 10 fitted and fixed to the other end. And a connecting member 40 for connecting the pipe (not shown) to the housing 10.

  The housing 10 includes a cylindrical central housing 11, a front housing 12 disposed on the front side of the central housing 11, and a rear housing 13 disposed on the rear side of the central housing 11, and is formed of an aluminum-based metal. ing. These housing members 11 to 13 are fastened and integrated with bolts or the like (not shown) at a plurality of locations in the circumferential direction. Inside the central housing 11, there is provided a coolant flow passage 14 formed so as to go around in the circumferential direction with a predetermined width. An inlet 15 for introducing the coolant from the outside of the housing to the flow passage 14 is provided at a predetermined position in the circumferential direction of the central housing 11. A connecting member 40, which will be described in detail later, is fitted and fixed to the introduction port 15. In addition, as a cooling liquid, well-known things, such as water and oil, are employable.

  The rotary shaft 20 is rotatably supported via a pair of bearings 21 and 22 held by the front housing 12 and the rear housing 13. A rotor 25 having a plurality of magnetic poles formed so that polarities are alternately changed in the circumferential direction by a plurality of permanent magnets embedded in the outer peripheral portion is fitted and fixed to the outer peripheral surface of the rotary shaft 20. A pulley 23 is fixed to the front end portion of the rotary shaft 20 coaxially with the rotary shaft 20 by a nut 23a. A tension belt (not shown) that transmits the torque of the rotary shaft 20 is installed on the pulley 23.

  The stator 30 includes an annular stator core 31 having a plurality of slots (not shown) arranged in the circumferential direction, and a three-phase phase winding housed in the slot and wound around the stator core 31 by a predetermined method. And a stator winding 32 made of a wire. The outer periphery of the stator 30 is fixed and held on the inner peripheral surface of the central housing 11 in a state of facing the outer side of the rotor 25 in the radial direction.

  The connection member 40 is formed of a stainless steel (SUS) pipe, and one end thereof is fitted and fixed to the introduction port 15 provided in the central housing 11 by press fitting. That is, one end of the connection member 40 is fixed in a state where pressure is received inward from the peripheral wall surface of the introduction port 15 of the central housing 11. In addition, the linear expansion coefficient of the connection member 40 made of stainless steel is smaller than the linear expansion coefficient of the central housing 11 made of aluminum metal. As shown in FIGS. 1 and 2, the connecting member 40 includes a radially extending portion 40a that extends radially outward from a fitting fixing portion with the central housing 11, and a distal end of the radially extending portion 40a. It has an axially extending portion 40b extending toward the axially front side, and is formed in an L shape. The connection member 40 has a communication space 41 with the flow passage 14.

  A ring-shaped flange 40c that protrudes outward from the outer peripheral surface of the radial extension 40a is provided at a predetermined position from the one end in the extending direction of the radial extension 40a toward the center. Further, a flange portion 40d similar to the flange portion 40c is provided at a predetermined position near the center side from the other end in the extending direction of the axially extending portion 40b. These flange portions 40c and 40d function as stoppers when each end portion of the connection member 40 is fitted to another member.

  As shown in FIG. 3, a planar chamfering process is performed at the corner on the housing outer peripheral surface side of the introduction port 15 to which one end portion of the connection member 40 is fitted and fixed. C chamfering) is applied. Thereby, the cross section is triangular and annular between the chamfered surface 11a of the central housing 11 and the outer peripheral surface of the corner portion where the radially extending portion 40a and the flange portion 40c of the connecting member 40 facing the central housing 11 intersect. A space 16 is formed. The space portion 16 is filled with a bubble resin 45 containing bubbles 45a. In the first embodiment, as the bubble resin 45, a resin in which a predetermined amount of bubbles is positively mixed with an anaerobic adhesive (“Loctite” (trade name)) is employed. Note that the anaerobic adhesive employed here is a condition for curing that is shielded from oxygen and in contact with metal. Further, a high temperature is a condition for promoting curing.

  The bubble resin 45 is applied to the inner wall surface and the chamfered surface 11 a of the introduction port 15 before one end of the connection member 40 is fitted and fixed to the introduction port 15 of the central housing 11 by press fitting. At this time, the bubble resin 45 is applied in a sufficiently large amount so as to surely fill the entire space 16. Then, after the connecting member 40 is press-fitted, the bubble resin is formed in the space 16 and the minute gap formed between the press-fitting surfaces of the one end of the connecting member 40 and the introduction port 15 of the central housing 11. 45 is filled in a filled state.

  Thereafter, the anaerobic adhesive of the enclosed bubble resin 45 is cut off from the external air (oxygen) and is in contact with the metal connecting member 40 and the central housing 11 to satisfy the hardening conditions and harden. . That is, since the bubble resin 45 is anaerobic adhesive and is uncured before the connection member 40 is fitted, the connection member 40 can be press-fitted and cured after the connection member 40 is fitted. The member 40 is fixed. As a result, the minute gaps between the press-fitting surfaces of the connecting member 40 and the central housing 11 and the space 16 are filled with the hardened bubble resin 45 filled. As a result, the connection member 40 fitted and fixed to the introduction port 15 and the central housing 11 are firmly bonded by the bubble resin 45 filled in the space portion 16 and the space portion 16 is securely sealed. Become.

  On the other hand, a pipe or the like (not shown) for conveying the coolant is connected and fixed to the other end of the connecting member 40 (axially extending portion 40b). The cooling liquid is introduced into the flow passage 14 by a cooling device (not shown) having a pump, a radiator and the like installed on the circulation path of the cooling liquid through the piping and the connection member 40. Further, at a predetermined position in the circumferential direction of the central housing 11, there is provided a discharge port (not shown) through which cooling liquid that cools the central housing 11 by flowing through the flow passage 14 is discharged to the outside of the housing. The high-temperature coolant discharged from the discharge port is lowered in temperature by the cooling device installed on the coolant circulation path, and then introduced again into the flow passage 14 from the introduction port 15. Repeat the circulation path of

  In the rotating electrical machine 1 according to the first embodiment configured as described above, when an alternating current is applied to the stator winding 32 from an inverter (not shown), the stator core 31 is excited to cause the rotor 25 to rotate. Rotate in a predetermined direction together with 20. As a result, the torque of the rotating shaft 20 is supplied as power to other devices via the pulley 23 and the tension belt installed on the pulley 23.

  The cooling liquid is introduced into the flow path 14 from the inlet 15 provided in the housing 10 by a cooling device provided on the circulation path of the cooling liquid. The introduced coolant flows through the flow path 14 toward the discharge port and is discharged from the discharge port to the circulation path. At this time, the housing 10 heated by the heat generated by the stator winding 32 is cooled by the coolant flowing through the flow passage 14. Thereafter, the high-temperature coolant discharged to the circulation path is lowered in temperature and then introduced again from the introduction port 15 into the flow path 14 to cool the housing 10 by repeatedly circulating the coolant circulation path. .

  At this time, as shown in FIG. 4, when the environmental temperature rises due to heat generated by the stator winding 32 in the fitting fixing portion in which one end portion of the connection member 40 is fitted and fixed to the introduction port 15 of the central housing 11. Since the linear expansion of the connecting member 40 is smaller than the linear expansion of the central housing 11, the distance between the central housing 11 and the connecting member 40 becomes larger. In the case of the first embodiment, the space resin 16 of the fitting and fixing portion between the central housing 11 and the connection member 40 is filled with the bubble resin 45 including the bubbles 45a. The bubble resin 45 includes bubbles 45a, so that the Young's modulus is smaller than the Young's modulus of a resin alone that does not contain bubbles, and is easily extended. Therefore, as shown in FIG. 5, the stress at which the adhesive surface between the bubble resin 45 and the central housing 11 and the adhesive surface between the bubble resin 45 and the connection member 40 are peeled off by the thermal expansion force of the bubbles 45 a included in the bubble resin 45. Since it is relieved, peeling of the adhesive surface is effectively suppressed. As a result, it is possible to reliably prevent the corrosive liquid from entering the fitting and fixing portion, and good corrosion resistance can be obtained.

  6 and 7 show a comparative example 1 in which bubbles are not contained in the resin 145 filled in the space 16 of the fitting and fixing portion between the central housing 11 and the connecting member 40. FIG. In the case of the comparative example 1, when the environmental temperature rises due to heat generated by the stator winding 32 and the central housing 11 expands more than the connection member 40, the resin 145 contains no bubbles. Then, at least one of the adhesive surface between the resin 145 and the central housing 11 and the adhesive surface between the resin 145 and the connecting member 40 is peeled off. In this case, as shown in FIG. 7, the adhesive surface between the resin 145 and the central housing 11 having a low adhesive strength is peeled off.

  As described above, according to the rotating electrical machine 1 of the first embodiment, the space resin 16 of the fitting and fixing portion between the central housing 11 and the connecting member 40 is filled with the bubble resin 45 including the bubbles 45a. Therefore, when the environmental temperature rises due to heat generated by the stator winding 32, the stress that causes the bubble resin 45 and the adhesive surface of the central housing 11 and the adhesive surface of the bubble resin 45 and the connection member 40 to peel off is applied to the bubble resin 45. It can relieve | moderate by the thermal expansion force of the bubble 45a contained, and can suppress peeling of an adhesion surface effectively. Thereby, since it is possible to reliably prevent the corrosive liquid from entering the fitting and fixing portion, it is possible to obtain a good corrosion resistance and to obtain a rotating electrical machine having excellent corrosion resistance.

  In the first embodiment, the connecting member 40 includes a radial extension 40a that extends radially outward from the fitting and fixing portion with the central housing 11, and an axial front from the tip of the radial extension 40a. And an axially extending portion 40b extending to the side. Therefore, it is possible to suppress the gap between the connection member 40 and the fitting fixing portion of the central housing 11 from being expanded by the tension of the pipe or the like that is connected and fixed to the connection member 40. The penetration of liquid can be suppressed and the corrosion resistance effect can be maintained.

[Embodiment 2]
A rotating electrical machine according to Embodiment 2 will be described with reference to FIG. The rotating electrical machine of the second embodiment has a first resin portion 46 filled in a gap 17 formed between the fitting surface of the central housing 11 and the connection member 40, and a cellular resin 45 filled in the space portion 16. The first resin portion 46 is different from the first embodiment in that the first resin portion 46 and the first resin portion 46 are integrally coupled. Therefore, elements common to the first embodiment are denoted by the same reference numerals, detailed description thereof is omitted, and different points and important points will be described below.

  One end of the connection member 40 of the second embodiment is fitted and fixed to the introduction port 15 provided in the central housing 11 not by press fitting but by clearance fitting. That is, in the second embodiment, the outer diameter of one end portion of the connection member 40 is smaller than the diameter of the introduction port 15, and is formed in the case of press-fitting between the center housing 11 and the fitting surface of the connection member 40. A gap 17 larger than the gap to be formed is formed. The gap 17 is filled with a first resin portion 46 made of the same resin as the bubble resin 45.

  That is, the first resin portion 46 is introduced into the introduction port together with the bubble resin 45 applied to the chamfered surface 11 a of the introduction port 15 before the one end portion of the connection member 40 is fitted into the introduction port 15 of the central housing 11. 15 is applied to the inner wall surface. The first resin portion 46 and the bubble resin 45 are applied in a sufficiently large amount so that the entire area of the gap 17 and the space portion 16 is surely filled when one end portion of the connection member 40 is fitted into the introduction port 15. Is done. As a result, the first resin portion 46 filled in the gap 17 and the bubble resin 45 filled in the space portion 16 are integrally coupled. The first resin portion 46 is the same as the bubble resin 45, but may be different from the bubble resin 45.

  According to the rotating electrical machine of Embodiment 2 configured as described above, the same operations and effects as those of Embodiment 1 are exhibited. In particular, in the case of the second embodiment, since the first resin portion 46 filled in the gap 17 is integrally coupled with the bubble resin 45 filled in the space portion 16, the central housing 11 and the connection member 40 are combined. It is possible to more reliably prevent the corrosive liquid from entering the fitting and fixing portion of the, and maintain a good corrosion resistance effect.

[Embodiment 3]
A rotating electrical machine according to Embodiment 3 will be described with reference to FIGS. 9 and 10. The rotating electrical machine of the third embodiment includes a second resin portion 47 filled in the connection boundary portion 18 between the surface of the connection member 40 and the surface of the central housing 11, and the bubble resin 45 filled in the space portion 16 and the second resin portion 47. The second resin portion 47 is different from the first embodiment in that the two resin portions 47 are integrally coupled. Therefore, elements common to the first embodiment are denoted by the same reference numerals, detailed description thereof is omitted, and different points and important points will be described below.

  In the third embodiment, a gap is formed in the connection boundary portion 18 between the surface of the flange portion 40 c of the connection member 40 and the surface of the central housing 11. The connection boundary portion 18 is filled with a second resin portion 47 made of the same resin as the bubble resin 45. This second resin portion 47 is, together with the bubble resin 45 applied to the chamfered surface 11a of the inlet 15 before one end of the connecting member 40 is fitted and fixed to the inlet 15 of the central housing 11 by press fitting. It is applied to the chamfered surface 11 a of the introduction port 15. At this time, the second resin portion 47 and the bubble resin 45 are surely filled with the bubble resin 45 in the entire area of the space portion 16 when one end portion of the connection member 40 is press-fitted into the introduction port 15. A sufficiently large amount is applied so that the second resin portion 47 overflows from the connection boundary portion 18.

  Thereby, the bubble resin 45 filled in the space portion 16 and the second resin portion 47 overflowing the connection boundary portion 18 are integrally coupled. In this case, the second resin portion 47 covers the entire circumferential direction of the connection boundary portion 18 without interruption, and overflows the connection boundary portion 18 to the extent that it can be visually confirmed. Since the second resin portion 47 overflowing to the connection boundary portion 18 comes into contact with oxygen in the air and does not satisfy the curing conditions of the anaerobic adhesive, it is cured in the heat treatment step. The second resin portion 47 is the same as the bubble resin 45, but may be different from the bubble resin 45.

  According to the rotating electrical machine of Embodiment 3 configured as described above, the same operations and effects as those of Embodiment 1 are exhibited. In particular, in the case of the third embodiment, the second resin portion 47 filled in the connection boundary portion 18 is integrally coupled with the bubble resin 45 filled in the space portion 16, so that the central housing 11 and the connection member It is possible to more reliably prevent the corrosive liquid from entering the 40 fitting fixing portion, and maintain a good corrosion resistance effect.

  In the third embodiment, since the second resin portion 47 filled in the connection boundary portion 18 covers the entire circumferential direction of the connection boundary portion 18 without interruption, the fitting between the central housing 11 and the connection member 40 is performed. It becomes possible to more reliably prevent the corrosive liquid from entering the joint fixing portion, and a better corrosion resistance effect can be obtained. Further, since the second resin portion 47 overflowing from the space portion 16 to the connection boundary portion 18 can be visually confirmed, it is shown that the entire area of the space portion 16 is completely filled with the bubble resin 45. Since it can be easily confirmed visually, the quality can be easily maintained.

  In the case of the first embodiment, in order to confirm that the entire area of the space portion 16 of the fitting and fixing portion between the central housing 11 and the connection member 40 is completely filled with the cellular resin 45, There is no means other than destructive inspection for destroying and inspecting the fitting and fixing portion of the connecting member 40, and it is virtually impossible to confirm the filling of the bubble resin 45 into the fitting and fixing portion. On the other hand, in the case of Embodiment 3, by visually observing the appearance of the second resin portion 47 overflowing to the connection boundary portion 18, the entire area of the space portion 16 is filled with the bubble resin 45. Can be easily confirmed.

[Embodiment 4]
A rotating electrical machine of Embodiment 4 will be described with reference to FIG. The rotating electrical machine of the fourth embodiment is different from the first embodiment in that the amount of bubbles 45a included in the bubble resin 45 is defined. Therefore, elements common to the first embodiment are denoted by the same reference numerals, detailed description thereof is omitted, and different points and important points will be described below.

  In the fourth embodiment, the bubble resin 45 filled in the space 16 formed between the central housing 11 and the connection member 40 is bonded to both the central housing 11 and the connection member 40. In this case, the anaerobic adhesive, which is the main component of the cellular resin 45, has a different adhesive force on the adhesive surface depending on the metal material of the bonding partner. The weaker the adhesive surface, the more the adhesive surface peels off due to thermal stress. Easy to do. Therefore, in the fourth embodiment, there are many air bubbles 45a included in the air bubble resin 45 on the weak adhesive side with reference to the center line L1 of the air bubble resin 45 located between the central housing 11 and the connection member 40. I am doing so. In the case of the fourth embodiment, the central housing 11 made of an aluminum-based metal has a weaker adhesive force than the connection member 40 made of stainless steel, so that a large number of bubbles 45a exist on the central housing 11 side.

  The center line L1 is a line connecting points between the adhesive surface of the bubble resin 45 and the central housing 11 and a point equidistant from the adhesive surface of the bubble resin 45 and the connection member 40. In the case where the central housing 11 and the connection member 40 are formed of the same metal material, the adhesive strength of the respective adhesive surfaces is considered in consideration of the size of the adhesion area of the central housing 11 and the connection member 40 to the bubble resin 45. What is necessary is just to decide the strength.

  According to the rotating electrical machine of Embodiment 4 configured as described above, the same operations and effects as those of Embodiment 1 are exhibited. In particular, in the case of the fourth embodiment, since the bubbles 45a included in the bubble resin 45 are present on the side having a weak adhesive force with respect to the center line L1 of the bubble resin 45, the environmental temperature is high. When rising, the thermal expansion force of the bubbles 45a included in the bubble resin 45 is applied more to the weaker adhesive force. Therefore, since the adhesive surface peeling stress with a weaker adhesive force can be reduced, peeling of the adhesive surface can be more reliably suppressed. As a result, it is possible to reliably prevent the corrosive liquid from entering the fitting and fixing portion, and a better corrosion resistance effect can be obtained.

  In common with each of the above embodiments, it is more preferable that the bubbles 45a do not exist at the positions of the adhesive surface of the bubble resin 45 and the central housing 11 and the adhesive surface of the bubble resin 45 and the connecting member 40. This is because if there is a bubble portion at the position of the bonding surface, the corrosive liquid may invade and corrosion of the central housing 11 and the connecting member 40 may progress from there.

[Other Embodiments]
The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

  For example, in the above embodiment, the space 16 formed between the central housing 11 and the connection member 40 is formed on the chamfered surface 11a of the central housing 11, but is provided in a portion other than the chamfered surface 11a. May be. In addition, the chamfered surface 11a is obtained by performing a flat C chamfering process, but may be subjected to a curved R chamfering process instead.

  Further, in the above embodiment, the connection member 40 fitted and fixed to the introduction port 15 of the central housing 11 is disposed inside the central housing 11, but the arrangement positions of the central housing 11 and the connection member 40 are inside and outside. You may arrange | position so that it may become reverse.

  In the above embodiment, an example of a vehicular electric motor has been described as the rotating electric machine. However, the present invention includes a rotating member such as a shaft or a shaft, such as a generator, an electric motor, or a motor generator. Any device can be used.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle electric motor (rotary electric machine), 10 ... Housing, 14 ... Flow path, 16 ... Space part, 17 ... Gap, 18 ... Connection boundary part, 40 ... Connection member, 40a ... Radially extending part, 40b ... Shaft Direction extending part, 41 ... Communication space, 45 ... Bubble resin, 45a ... Bubble, 46 ... First resin part, 47 ... Second resin part, L1 ... Center line.

Claims (6)

A housing (10) having flow passages of the cooling liquid (14), the rotary electric machine having one end portion to the housing is provided with a connecting member (40), having a communication space (41) between said flow passage is fitted and fixed In (1),
The connecting member has an annular flange projecting outward from the outer peripheral surface;
The housing is chamfered at the opening on the outer peripheral surface side of the introduction port (15) to which the connection member is fitted and fixed,
In the fitting and fixing portion between the housing and the connection member, a space formed by the introduction port of the housing, an outer peripheral surface on one end side of the connection member, and a surface on one end side of the flange portion ( 16) is formed,
A rotating electrical machine in which the space portion is formed of an anaerobic adhesive and is filled with a bubble resin (45) containing bubbles (45a).   The rotating electrical machine according to claim 1, wherein the space is a closed space defined by the connection member and the housing.   The foam resin and the first resin having a first resin portion (46) filled in a gap (17) formed between the housing and the fitting surface of the connection member, The rotating electrical machine according to claim 1, wherein the portions are integrally coupled. The second resin part (47) filled in the connection boundary part (18) between the surface of the connection member and the surface of the housing has the bubble resin and the second resin part filled in the space part. The rotating electrical machine according to claim 1 or 3 , wherein the rotating electrical machines are integrally coupled. The rotating electrical machine according to claim 4 , wherein the second resin portion covers the entire circumferential direction of the connection boundary portion without interruption. The connecting member has a radially extending portion (40a) extending radially outward from the fitting fixing portion with the housing, and an axially extending portion (40b) extending in the axial direction. The rotary electric machine as described in any one of Claims 1-5 .

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