JP7398008B2 - Housing with connector and manufacturing method of housing with connector - Google Patents

Description

The present invention relates to a housing with a connector and a method of manufacturing the housing with a connector.

For example, a connector is attached to the casing of the rotating electrical machine for electrical connection with the rotating electrical machine. When installing the connector, it is necessary to maintain watertightness inside the casing, so a through hole coated with lubricant is formed in the casing, and the connector fitted with a sealing material penetrates the through hole while coming into contact with the inner wall of the through hole. inserted into the hole. In this case, if the lubricant adheres to the outer surface of the casing, the adhesive force of the adhesive or the like that bonds the outer surface of the casing and the connector decreases, so it is necessary to prevent the lubricant from adhering to the outer surface.

Patent Document 1 discloses that a fitting hole of an aluminum casing into which a connector equipped with a sealing member is fitted has a first hole on the entrance side, a second hole on the back side that is smaller than the first hole, and a first hole. A waterproof structure is described that is formed by a stepped portion of a tapered surface in order to adjust the difference in size at the joint between the first hole and the second perforation.

Japanese Patent Application Publication No. 2012-114052

Patent Document 1 does not take into account the shape of the through-hole to prevent the lubricant applied to the inner wall of the through-hole from adhering to the outer surface of the casing, resulting in the problem of lubricant adhering to the outer surface of the casing. There is.

A housing with a connector according to the present invention includes a housing in which a through hole is formed, a connector inserted into the through hole, and a sealing material attached to the connector and in contact with an inner wall of the through hole, The inner wall of the through hole has a first inner surface coated with a lubricant and in contact with the sealing material, and a second inner wall coated with the lubricant and formed at a first obtuse angle toward the casing side with respect to the first inner surface. and a third inner surface connecting the second inner surface and the outer surface of the casing, the third inner surface being larger than the first obtuse angle toward the casing with respect to the first inner surface. The connector, which is formed at a second obtuse angle of 180 degrees or less and inserted into the through hole, is fixed to the outer surface of the casing via an adhesive or a sealant.
A method for manufacturing a housing with a connector according to the present invention includes: a housing in which a through hole is formed; a connector inserted into the through hole; a sealing material attached to the connector and in contact with an inner wall of the through hole; The inner wall of the through hole has a first inner surface in contact with the sealing material, a second inner surface formed at a first obtuse angle toward the housing with respect to the first inner surface, and the second inner wall. a third inner surface connecting the outer surface of the casing, the third inner surface forming an angle with respect to the first inner surface toward the casing that is larger than the first obtuse angle and less than or equal to 180 degrees. A method for manufacturing a housing with a connector formed at a second obtuse angle, the method comprising: applying a lubricant to the first inner surface and the second inner surface; and bringing the sealing material into contact with the first inner surface. The method includes the steps of inserting the connector into the through hole, and fixing the connector and the outer surface of the casing via an adhesive or a sealant.

According to the present invention, it is possible to prevent lubricant from adhering to the outer surface of the casing.

FIG. 3 is a cross-sectional view of a housing with a connector. FIG. 2 is a partially enlarged sectional view of a through hole and a housing in Example 1. FIG. 7 is a partially enlarged sectional view of a through hole and a housing in Example 2. FIG. 7 is a partially enlarged sectional view of a through hole and a housing in Example 3. FIG. 7 is a partially enlarged sectional view of a through hole and a housing in Example 4. (A) (B) (C) It is a figure showing the manufacturing method of a housing with a connector. FIG. 3 is a perspective view of the casing and connector of the rotating electric machine.

Embodiments of the present invention will be described below with reference to the drawings. The following description and drawings are examples for explaining the present invention, and are omitted and simplified as appropriate for clarity of explanation. The present invention can also be implemented in various other forms. Unless specifically limited, each component may be singular or plural.

The position, size, shape, range, etc. of each component shown in the drawings may not represent the actual position, size, shape, range, etc. in order to facilitate understanding of the invention. Therefore, the present invention is not necessarily limited to the position, size, shape, range, etc. disclosed in the drawings.

When there are multiple components having the same or similar functions, the same reference numerals may be given different suffixes for explanation. However, if there is no need to distinguish between these multiple components, the subscripts may be omitted in the description.

FIG. 1 is a sectional view of a housing with a connector.
FIG. 1 shows a housing 20 in which a through hole 10 is formed and a connector 30 inserted into the through hole 10. The housing 20 is, for example, a housing of a rotating electric machine. The connector 30 is, for example, an electrical connector for connecting to a rotating electric machine. The electrical wiring that passes through the connector 30 is not shown. A sealing material 31 that contacts the inner wall 11 of the through hole 10 is attached to the connector 30 around the connector 30 . The sealing material 31 is, for example, an O-ring.

The through hole 10 has a large opening on the entrance side into which the connector 30 is inserted, and a small opening on the back side. Before inserting the connector 30 into the through hole 10, a lubricant 12 is applied to the inner wall 11 of the through hole 10. After that, the connector 30 is inserted into the back side of the through hole 10 by deforming the sealing material 31 while bringing the sealing material 31 of the connector 30 into contact with the inner wall 11. However, since the connector 30 is coated with the lubricant 12, there is no contact during insertion. resistance is reduced. After the connector 30 is inserted into the through hole 10, the connector 30 is fixed to the outer surface 21 of the housing 20 via the adhesive 32. Note that not only the adhesive 32 but also a sealant may be used. When a sealant is used, the connector 30 is fixed to the outer surface 21 of the housing 20 with bolts or the like.

FIG. 2 is a partially enlarged sectional view of the through hole 10 and the housing 20 in the area P of FIG. 1, and shows Example 1. FIG. 2 shows a state in which the lubricant 12 has been applied before the connector 30 is inserted. FIG. 2 is an enlarged sectional view of partial example 1 of the through hole 10 and the housing 20.

As shown in FIG. 2, the inner wall 11 of the through hole 10 includes a first inner surface 11-1 on the back side of the through hole 10, a third inner surface 11-3 on the entrance side, and a first inner surface 11-1 and a third inner surface. 11-3. The third inner surface 11-3 connects the second inner surface 11-2 and the outer surface 21 of the housing 20. The second inner surface 11-2 is formed at a first obtuse angle α1 toward the housing 20 with respect to the first inner surface 11-1. The third inner surface 11-3 is formed at a second obtuse angle α2, which is larger than the first obtuse angle α1 and less than 180 degrees, toward the housing 20 with respect to the first inner surface 11-1. In the example shown in FIG. 2, the second obtuse angle α2 is 180 degrees. That is, 90 degrees<α1<α2≦180 degrees.

Note that the boundary surface 11-0 between the first inner surface 11-1 and the second inner surface 11-2 is chamfered to remove corners. This makes it easier to insert the connector 30 into the through hole 10 by deforming the sealing material 31 of the connector 30. However, the boundary surface 11-0 is not necessarily required and may be left as a corner.

The lubricant 12 is applied to the first inner surface 11-1 and the second inner surface 11-2 that are in contact with the sealing material 31, but not to the third inner surface 11-3. The connector 30 is constructed by bringing the sealing material 31 into contact with the second inner surface 11-2, inserting the connector 30 into the through hole 10 while deforming the sealing material 31, and then bringing the sealing material 31 into contact with the first inner surface 11-1. to complete the insertion.

If the lubricant 12 applicator is close to the outer surface 21 of the housing 20 when applying the lubricant 12, the lubricant 12 may be pulled toward the outer surface 21 due to surface tension, and the lubricant 12 may adhere to the outer surface 21. be. If the lubricant 12 adheres to the outer surface 21, which is the adhesive surface between the connector 30 and the housing 20, the adhesive force between the connector 30 and the outer surface 21 of the housing 20 will be reduced. Therefore, in this embodiment, the through hole 10 is formed into the shape shown in Example 1, and the coating device applies the lubricant 12 to the first inner surface 11-1 and the second inner surface 11-2, and the third inner surface 11-2 which is not coated with the lubricant 12. 3, the distance to the outer surface 21 of the housing 20 was secured. This reduces the influence of the surface tension of the lubricant 12, making it possible to prevent the lubricant 12 from adhering to the outer surface 21, thereby preventing a decrease in the adhesive force between the connector 30 and the outer surface 21 of the housing 20.

Further, in the cross section in the insertion direction of the connector 30 in the through hole 10 shown in FIG. 2, it is desirable that the length L2 of the second inner surface 11-2 is longer than the length L3 of the third inner surface 11-3. By increasing the length L3 of the third inner surface 11-3 to which the lubricant 12 is not applied, the distance to the outer surface 21 of the casing 20 can be secured, and the influence of the surface tension of the lubricant 12 on the outer surface 21 is reduced. Adhesion of the lubricant 12 can be prevented.

Furthermore, as shown in FIG. 1, a predetermined space S was formed between the third inner surface 11-3 and the connector 30. As a result, when there is a large amount of lubricant 12 applied to the first inner surface 11-1 and the second inner surface 11-2, this can be absorbed in a predetermined space, and the lubricant to the outer surface 21 of the housing 20 can be absorbed. 12 can be more reliably prevented from adhering.

FIG. 3 is a partially enlarged sectional view of the through hole 10 and the casing 20 in the region P of FIG. 1, and shows Example 2. 3 shows a state before the connector 30 is inserted and before the lubricant 12 is applied, and the shape of the boundary surface 11-0 is different from Example 1 shown in FIG. 2.

As shown in FIG. 3, the boundary surface 11-0 between the first inner surface 11-1 and the second inner surface 11-2 has a rounded shape with no corners. This makes it easier to insert the connector 30 into the through hole 10 by deforming the sealing material 31. The rest of the configuration is the same as the configuration of Example 1 shown in FIG. 2, and the same parts are given the same reference numerals and the explanation thereof will be omitted. In Example 2, the same effects as in Example 1 already described are achieved.

FIG. 4 is a partially enlarged cross-sectional view of the through hole 10 and the housing 20 in the region P of FIG. 1, and shows Example 3. FIG. 4 shows a state before the connector 30 is inserted and before the lubricant 12 is applied, and shows an example of the angle between the second inner surface 11-2 and the third inner surface 11-3.

As shown in FIG. 4, the second inner surface 11-2 is formed at a first obtuse angle α1 toward the housing 20 with respect to the first inner surface 11-1. The third inner surface 11-3 is formed at a second obtuse angle α2, which is larger than the first obtuse angle α1 and less than 180 degrees, toward the housing 20 with respect to the first inner surface 11-1. In example 3 shown in FIG. 4, the first obtuse angle α1 is 135 degrees and the second obtuse angle α2 is 160 degrees. The rest of the configuration is the same as the configuration of Example 1 shown in FIG. 2, and the same parts are given the same reference numerals and the explanation thereof will be omitted. In addition, in Example 3, the same effect as in Example 1 already described is achieved, and since the second obtuse angle α2 is made smaller than 180 degrees, when the lubricant 12 is applied by the application device, it is difficult to contact the third inner surface 11-3. This can be reliably avoided, and the lubricant 12 can be prevented from adhering to the outer surface 21 of the housing 20.

FIG. 5 is a partially enlarged sectional view of the through hole 10 and the housing 20 in the area P of FIG. 1, and shows Example 4. FIG. 5 shows a state before the connector 30 is inserted and before the lubricant 12 is applied, and shows an example of the angle between the second inner surface 11-2 and the third inner surface 11-3. , an example in which the first obtuse angle α1 is made smaller compared to Example 3 is shown.

As shown in FIG. 5, the second inner surface 11-2 is formed at a first obtuse angle α1 toward the housing 20 with respect to the first inner surface 11-1. The third inner surface 11-3 is formed at a second obtuse angle α2, which is larger than the first obtuse angle α1 and less than 180 degrees, toward the housing 20 with respect to the first inner surface 11-1. In example 4 shown in FIG. 5, the first obtuse angle α1 is 120 degrees and the second obtuse angle α2 is 160 degrees. The rest of the configuration is the same as the configuration of Example 1 shown in FIG. 2, and the same parts are given the same reference numerals and the explanation thereof will be omitted. In Example 4, in addition to producing the same effect as in Example 1, the second obtuse angle α2 is made smaller than 180 degrees, so that when the lubricant 12 is applied by the applicator, it does not come in contact with the third inner surface 11-3. This can be reliably avoided, and the lubricant 12 can be prevented from adhering to the outer surface 21 of the housing 20.

6(A), FIG. 6(B), and FIG. 6(C) are diagrams showing a method of manufacturing a housing with a connector. 6(A) shows the process of applying the lubricant 12, FIG. 6(B) shows the process of inserting the connector 30, and FIG. 6(C) shows the process of fixing the connector 30.

The housing 20 has the through holes 10 exemplified in Examples 1 to 4 formed therein. That is, the inner wall 11 of the through hole 10 has a first inner surface 11-1 that contacts the sealing material 31, and a second inner surface that is formed at a first obtuse angle α1 toward the housing 20 with respect to the first inner surface 11-1. 11-2, and a third inner surface 11-3 that connects the second inner surface 11-2 and the outer surface 21 of the housing 20, and the third inner surface 11-3 is opposite to the first inner surface 11-1. A second obtuse angle α2, which is larger than the first obtuse angle α1 and is 180 degrees or less, is formed on the casing 20 side (see Examples 1 to 4).

In the step of applying the lubricant 12 shown in FIG. 6(A), the applicator 40 impregnated with the lubricant 12 is brought into sliding contact with the first inner surface 11-1, and the lubricant 12 is applied to the first inner surface 11-1. Apply. At this time, the excess lubricant 12 also applies the lubricant 12 to the second inner surface 11-2. The lubricant 12 is not applied to the third inner surface 11-3, and the presence of the third inner surface 11-3 ensures a distance to the outer surface 21 of the housing 20, so the influence of the surface tension of the lubricant 12 is reduced. is small, and it is possible to prevent the lubricant 12 from adhering to the outer surface 21.

In the step of inserting the connector 30 shown in FIG. 6(B), the connector 30 is inserted into the through hole 10 while bringing the sealing material 31 into contact with the first inner surface 11-1.
In the step of fixing the connector 30 shown in FIG. 6(C), the connector 30 and the outer surface 21 of the housing 20 are fixed via the adhesive 32. It may be fixed with not only the adhesive 32 but also a sealant.

FIG. 7 is a perspective view of the housing 20 and connector 30 of the rotating electric machine 200.
The rotating electrical machine 200 includes a rotor and a stator inside a casing 20, and the casing 20 is closed with a cover 22. A shaft 23 directly connected to the rotor is led out from the housing 20.

The connector 30 is an electrical connector for connecting to the rotating electric machine 200, and the electrical wiring that passes through the connector 30 is not shown. As described with reference to FIG. 1, the sealing material 31 that contacts the inner wall 11 of the through hole 10 is attached to the connector 30 around the connector 30.

The housing 20 has the through holes 10 exemplified in Examples 1 to 4 formed therein. Therefore, when the connector 30 is inserted into the through hole 10, it is possible to prevent the lubricant 12 from adhering to the outer surface 21 of the housing 20. Therefore, when the connector 30 is fixed to the outer surface 21 of the casing 20, the adhesive force between the connector 30 and the outer surface 21 of the casing 20 can be prevented from decreasing.

According to the embodiment described above, the following effects can be obtained.
(1) A housing with a connector includes a housing 20 in which a through hole 10 is formed, a connector 30 that is inserted into the through hole 10, and a sealing material 31 that is attached to the connector 30 and contacts the inner wall 11 of the through hole 10. The inner wall of the through hole 10 has a first inner surface 11-1 coated with a lubricant 12 and in contact with the sealing material 31, and a first inner wall 11-1 coated with the lubricant 12 and a casing 20 with respect to the first inner wall 11-1. The third inner surface has a second inner surface 11-2 formed with a first obtuse angle α1 on the side, and a third inner surface 11-3 that connects the second inner surface 11-2 and the outer surface 21 of the housing 20. 11-3 is formed with a second obtuse angle α2 that is larger than the first obtuse angle α1 and less than 180 degrees on the casing 20 side with respect to the first inner surface 11-1, and is inserted into the through hole 10. The connector 30 is fixed to the outer surface 21 of the housing 20 via an adhesive 32 or a sealant. Thereby, it is possible to prevent the lubricant 12 from adhering to the outer surface 21 of the housing 20.

(2) A method for manufacturing a housing with a connector includes: a housing 20 in which a through hole 10 is formed; a connector 30 inserted into the through hole 10; and a connector 30 that is attached to the connector 30 and contacts the inner wall 11 of the through hole 10. The inner wall 11 of the through hole 10 has a first inner surface 11-1 in contact with the seal material 31, and a first obtuse angle α1 toward the housing 20 with respect to the first inner surface 11-1. The second inner surface 11-2 is formed, and the third inner surface 11-3 connects the second inner surface 11-2 and the outer surface 21 of the housing 20, and the third inner surface 11-3 is the first inner surface. 11-1, the second obtuse angle α2 is larger than the first obtuse angle α1 and is less than 180 degrees. A step of applying lubricant 12 to the inner surface 11-1 and the second inner surface 11-2, a step of inserting the connector 30 into the through hole 10 while bringing the sealing material 31 into contact with the first inner surface 11-1, and a step of inserting the connector 30 into the through hole 10. The method includes a step of fixing the outer surface 21 of the housing 20 with an adhesive 32 or a sealant. Thereby, it is possible to prevent the lubricant 12 from adhering to the outer surface 21 of the housing 20.

The present invention is not limited to the above-described embodiments, and other forms conceivable within the scope of the technical idea of the present invention are also included within the scope of the present invention, as long as they do not impair the characteristics of the present invention. . Further, a configuration may be adopted in which the above-described embodiment and a plurality of examples are combined.

DESCRIPTION OF SYMBOLS 10... Through hole, 11... Inner wall, 11-0... Boundary surface, 11-1... First inner surface, 11-2... Second inner surface, 11-3... Third Inner surface, 12... Lubricant, 20... Housing, 21... Outer surface, 22... Cover, 23... Shaft, 30... Connector, 31... Seal material, 32... - Adhesive, 40... Applicator, 200... Rotating electric machine, α1... First obtuse angle, α2... Second obtuse angle, L2... Length of second inner surface, L3...・Length of the third inner surface.

Claims (6)

A casing in which a through hole is formed;
a connector inserted into the through hole;
a sealing material attached to the connector and in contact with an inner wall of the through hole,
The inner wall of the through hole has a first inner surface coated with a lubricant and in contact with the sealing material, and a second inner wall coated with the lubricant and formed at a first obtuse angle toward the casing side with respect to the first inner surface. an inner surface, and a third inner surface connecting the second inner surface and the outer surface of the casing,
The third inner surface is formed with a second obtuse angle, which is larger than the first obtuse angle and is 180 degrees or less, toward the casing side with respect to the first inner surface,
The connector inserted into the through hole is fixed to the outer surface of the housing via an adhesive or a sealant. The housing with a connector according to claim 1,
In a cross section in the insertion direction of the connector in the through hole,
The length of the second inner surface is greater than the length of the third inner surface. In the housing with a connector according to claim 1 or claim 2,
A housing with a connector in which a first boundary portion connecting the first inner surface and the second inner surface has a chamfered shape or an R shape. In the housing with a connector according to claim 1 or claim 2,
A housing with a connector, in which a predetermined space is formed between the third inner surface and the connector. In the housing with a connector according to claim 1 or claim 2,
The casing is a casing of a rotating electric machine,
The connector is a housing with a connector that is an electrical connector for connecting to the rotating electric machine. A casing in which a through hole is formed;
a connector inserted into the through hole;
a sealing material attached to the connector and in contact with an inner wall of the through hole,
The inner wall of the through hole has a first inner surface in contact with the sealing material, a second inner surface formed at a first obtuse angle toward the casing with respect to the first inner surface, and a second inner surface and the casing. a third inner surface connecting the outer surface of the second inner surface to the outer surface of the second inner surface, the third inner surface forming a second obtuse angle larger than the first obtuse angle and not more than 180 degrees toward the casing side with respect to the first inner surface. A method of manufacturing a housing with a connector formed at an obtuse angle, the method comprising:
applying a lubricant to the first inner surface and the second inner surface;
inserting the connector into the through hole while bringing the sealing material into contact with the first inner surface;
A method for manufacturing a casing with a connector, the method comprising: fixing the connector to the outer surface of the casing using an adhesive or a sealant.

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