Rotary electric machine and method for manufacturing the same, water proof component and method for manufacturing the same

Abstract

To solve a problem of large workload in assembling a motor having a waterproof structure of Patent Document 1 because in a step of pulling out a cable from the inside of the motor to the outside thereof via the waterproof structure, the cable needs to be pushed in against friction generated between the inside of a cylindrical packing and the cable when the cable is passed through the cylindrical packing fitted in a recess.SOLUTION: A method for manufacturing a rotary electric machine includes the steps of: attaching a bearing to a rotor; inserting the rotor into a stator from an opening of the stator; disposing a waterproof component on the opening side of the rotor, the waterproof component including one end having a first groove portion and the other end having a second groove portion; arranging a cable connected to the stator between the first groove portion and the second groove portion of the waterproof component; arranging a bracket; and fastening a fastening component to the stator.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a manufacturing method for a rotating electric machine, a waterproof component, a manufacturing method for a waterproof component, and a rotating electric machine. [Background technology]

[0002] Depending on the environment in which the motor is used, it may be required to be water resistant. In a motor, a cable is usually inserted through a cable insertion hole provided through the housing, and power is supplied to the inside of the motor and a control panel controls the motor via this cable. For this reason, in a motor that requires water resistance, it is necessary to provide a waterproof structure for the insertion hole.

[0003] A waterproof structure for a cable outlet portion of an electric motor is disclosed in, for example, Patent Document 1. In the electric motor disclosed in Patent Document 1, a through hole penetrating the housing is formed. A recess is formed in the housing wall perpendicular to the longitudinal direction of the through hole, opening a part of the through hole into the housing wall. A cylindrical packing is fitted into the recess formed in the housing wall. The cylindrical packing is made of a deformable material. The size of the cylindrical packing is larger than the recess of the through hole. The cable is inserted from one opening of the through hole, passes through the inside of the packing, and is pulled out from the other opening of the through hole. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2005-12965 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the case of an electric motor having the waterproof structure of Patent Document 1, when assembling the electric motor, a process is required in which a cable is drawn from inside the electric motor to outside the electric motor via the waterproof structure. In this process, when passing the cable through the cylindrical packing fitted into the recess, the cable must be pushed in against the friction generated between the inside of the cylindrical packing and the cable. Therefore, the electric motor having the waterproof structure of Patent Document 1 has a problem in that the workload in assembling it is large.

[0006] The present disclosure has been made to solve the above-mentioned problems, and aims to provide a manufacturing method for a rotating electric machine, a waterproof component, a manufacturing method for a waterproof component, and a rotating electric machine that can reduce the workload in assembling a rotating electric machine with a waterproof structure. [Means for solving the problem]

[0007] The manufacturing method for a rotating electric machine according to the present disclosure includes the steps of attaching a bearing that supports the rotor shaft to a rotor, which is the rotating part of the rotating electric machine; inserting the rotor with the attached bearing into a stator, which is the fixed part of the rotating electric machine, through an opening in the stator; arranging a waterproof component having one end with a first groove and the other end with a second groove on the opening side of the rotor; arranging a cable connected to the stator between the first groove and the second groove of the waterproof component; placing a bracket in a position to sandwich the waterproof component between the bracket and the stator; and fastening a fastening component that fixes the bracket to the stator to the stator.

[0008] The waterproof component according to the present disclosure comprises a base portion having one end and the other end, a first end portion provided at one end and having a first groove portion, and a second end portion provided at the other end and having a second groove portion, and when the first end portion and the second end portion are joined together, the base portion, the first end portion, and the second end portion form a ring-shaped or polygonal shape, and the first groove portion and the second groove portion join together to form a hole, making it an elastic waterproof component.

[0009] The method for manufacturing a waterproof part according to the present disclosure includes the steps of pouring a material into a mold having a plurality of linear or spiral grooves each having one end and the other end, and having protrusions at each end thereof that cross the grooves, molding the material into a waterproof part, and removing the elastic waterproof part from the mold.

[0010] The rotating electric machine of the present disclosure comprises a rotor which is the rotating part of the rotating electric machine, a stator which has the rotor inside and an opening, a bracket which is a lid which covers the opening of the stator, a waterproof part which is positioned between the stator and the bracket and has one end which has a first groove portion and the other end which has a second groove portion, and a cable which is positioned between the first groove portion and the second groove portion and connected to the stator. Effect of the Invention

[0011] In the manufacturing method of a rotating electric machine disclosed herein, when assembling a rotating electric machine having a waterproof structure, a cable is placed between a first groove portion and a second groove portion of a waterproof component. Therefore, there is no need to push the cable against friction generated between the cable and the waterproof component. Therefore, the manufacturing method of a rotating electric machine disclosed herein can reduce the workload in assembling a rotating electric machine having a waterproof structure.

[0012] The waterproof component of the present disclosure includes a first end having a first groove and a second end provided at the other end having a second groove, so that the cable can be placed in a hole formed by the first groove and the second groove. This eliminates the need to push the cable against friction generated between the cable and the waterproof component. Therefore, the waterproof component of the present disclosure can reduce the workload involved in assembling a rotating electric machine having a waterproof structure.

[0013] According to the manufacturing method of the waterproof part of the present disclosure, a step of pouring a material into a mold in which a plurality of linear or spiral grooves having one end and the other end are formed and protrusions crossing the grooves are formed at one end and the other end are formed, and therefore the manufactured waterproof part has grooves at one end and the other end, and therefore, in the work of assembling a rotating electric machine having a waterproof structure, a cable can be placed between the groove provided at one end and the groove provided at the other end. Therefore, it is not necessary to push the cable against the friction generated between the waterproof part and the cable. Therefore, the manufacturing method of the waterproof part of the present disclosure can reduce the workload in the work of assembling a rotating electric machine having a waterproof structure.

[0014] The rotating electric machine of the present disclosure includes a waterproof component having one end with a first groove portion and the other end with a second groove portion, so that in assembling the rotating electric machine with a waterproof structure, a cable can be placed between the groove provided at one end and the groove provided at the other end. Therefore, there is no need to push the cable against friction generated between the waterproof component. Therefore, the rotating electric machine of the present disclosure can reduce the workload in assembling the rotating electric machine with a waterproof structure. Therefore, the rotating electric machine of the present disclosure can reduce the workload in assembling the rotating electric machine with a waterproof structure. [Brief description of the drawings]

[0015] [Figure 1] 1 is an overall view of a waterproof component according to a first embodiment. [Diagram 2] 4 is an enlarged view of a portion where a cable is arranged in the waterproof component in the first embodiment. FIG. [Diagram 3] 1 is a vertical sectional view of a rotating electric machine according to a first embodiment. [Figure 4] 4 is a flowchart showing a method for manufacturing the rotating electric machine in the first embodiment. [Diagram 5] 4 is a vertical cross-sectional view of the rotary electric machine according to the first embodiment when a bus bar is pulled out. FIG. [Figure 6] FIG. 13 is an overall view of a waterproof component in a first modified example. [Figure 7]13 is an overall view of a waterproof component in a first modified example in which a first end portion and a second end portion are joined together. FIG. [Figure 8] FIG. 11 is an overall view of a waterproof component in a second modified example. [Figure 9] FIG. 11 is an overall view of a waterproof component in a third modified example. [Figure 10] FIG. 13 is an overall view of a waterproof component in a fourth modified example. [Figure 11] FIG. 11 is an overall view of a waterproof component according to a second embodiment. [Figure 12] 11 is a cross-sectional view of a rotating electric machine using a waterproof component in accordance with a second embodiment. FIG. [Figure 13] FIG. 11 is an overall view of a waterproof part according to a second embodiment having a polygonal shape. [Figure 14] 11 is a cross-sectional view of a rotating electric machine in which the waterproof part in the second embodiment has a polygonal shape. FIG. [Figure 15] 13 is an enlarged view of a portion where a cable is arranged in a waterproof component in the third embodiment. FIG. [Figure 16] 13 is an enlarged view of a portion where a cable is arranged in a waterproof part in a modified example of the third embodiment. FIG. [Figure 17] FIG. 13 is an overall view of a waterproof component molded in a linear shape in embodiment 4. [Figure 18] FIG. 13 is an overall view of a waterproof part molded in a spiral shape in embodiment 4. [Figure 19] 13 is a flowchart showing a method for manufacturing a waterproof component in a fourth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, the embodiments will be described with reference to the drawings. In each drawing, the same reference numerals are used to denote common or corresponding elements, and the description is simplified or omitted. The configurations shown in the embodiments below are examples of the technical ideas of the present disclosure, and may be combined with other known technologies, or multiple technical ideas described in the present disclosure may be combined. In addition, it is also possible to omit or modify a part of the configuration without departing from the gist of the present disclosure.

[0017] Embodiment 1 FIG. 1 is an overall view of a waterproof part 1 in a first embodiment. FIG. 1 shows a case where the waterproof part 1 is annular. The dashed line in FIG. 1 shows the center line of the annular waterproof part 1. The coordinate system in FIG. 1 is a cylindrical coordinate system. In FIG. 1, the axial direction is the direction along the center line. The radial direction is the direction from the center line to the outside of the ring of the waterproof part 1, or the direction from the outside of the ring to the center line. The circumferential direction is the direction along the ring of the waterproof part 1. Hereinafter, unless otherwise specified, the cylindrical coordinate system is used for explanation. Note that the same cylindrical coordinate system is used for explanation when the waterproof part 1 is polygonal.

[0018] The waterproof component 1 comprises a base portion 11, a first end portion 12, and a second end portion 13. The base portion 11 has one end and the other end. The one end of the base component 11 has a first end portion 12. The first end portion 12 has a first groove portion 121. The other end of the base portion 11 has a second end portion 13. The second end portion 13 has a second groove portion 131.

[0019] FIG. 2 is an enlarged view of a portion of the waterproof component 1 where the cable 27 is arranged. The arrangement of the cable 27 will be described later. There may be a gap 100 between the first end 12 and the second end 13. As shown in FIG. 2, when the first end 12 and the second end 13 are joined, the base portion 11, the first end 12, and the second end 13 form a ring shape as shown in FIG. 1. Here, the first groove portion 121 and the second groove portion 131 are arranged to face each other when the first end 12 and the second end 13 are joined. In addition, at this time, the first groove portion 121 and the second groove portion 131 are joined to form a circular hole.

[0020] When the first end 12 and the second end 13 are joined together, the shape formed by the base portion 11, the first end 12, and the second end 13 is not limited to annular as shown in Fig. 1, but may be polygonal. Also, the shape of the hole formed by joining the first groove portion 121 and the second groove portion 131 is not limited to circular as shown in Fig. 2, but may be polygonal.

[0021] The hole formed by combining the first groove portion 121 and the second groove portion 131 is a hole that penetrates the waterproof component 1 in the radial direction. Note that this hole need only penetrate the waterproof component 1, and does not have to have the shortest length in the radial direction.

[0022] The waterproof component 1 is manufactured using an elastic material, such as rubber.

[0023] 3 is a vertical cross-sectional view of the rotating electric machine 2 according to the present embodiment. The rotating electric machine 2 includes a stator 21, a rotor 22, a bearing 23, a bracket 24, a fastening part 25, a terminal 26, a cable 27, and a waterproof part 1.

[0024] The stator 21 has an opening 211. The opening 211 is, for example, circular, and is an entrance portion of a cavity 212 inside the stator 21. The cavity 212 is, for example, cylindrical. The stator 21 includes a rotor 22 and a bearing 23 in the internal cavity 212. The rotor 22 is a rotating part in the rotating electric machine 2. The bearing 23 is a part that supports the shaft of the rotor 22. The bearing 23 is provided at one end side and the other end side of the shaft of the rotor 22 in positions that sandwich the rotor 22 from both sides. The bracket 24 is a lid that covers the opening 211 of the stator 21. The bracket 24 is, for example, circular. The bracket 24 is disposed at a position that sandwiches the waterproof component 1 with the stator 21. The bracket 24 supports the bearing 23 provided at one end side of the shaft of the rotor 22, and is integrated with the stator 21 when fastened to the stator 21.

[0025] The fastening part 25 is a part that fixes the bracket 24 and the waterproof part 1 to the stator 21. The fastening part 25 is, for example, a screw or a bolt. When the fastening part 25 is fastened, a force acts in the direction in which the bracket 24 presses the waterproof part 1 against the stator 21. Therefore, even if there is a gap 100 in the waterproof part 1, the waterproof part 1 elastically deforms and the gap 100 disappears, thereby realizing waterproofing between the first end 12 and the second end 13. In addition, the stator 21, the waterproof part 1, and the bracket 24 are also in close contact with each other, so that they form a waterproof structure and the rotating electric machine 2 can be made waterproof.

[0026] Terminal 26 is provided on stator 21. Terminal 26 serves to electrically connect cable 27 and stator 21. Terminal 26 is, for example, a metal fitting. Cable 27 is fixed to terminal 26 and electrically connected thereto. Cable 27 is, for example, a lead wire. The lead wire is an electric wire for electrically connecting an external power source to the inside of rotating electric machine 2. Cable 27 is, for example, a copper wire or a stranded wire covered with an insulating coating, and has flexibility.

[0027] Next, a manufacturing method of the rotating electric machine 2 will be described. Fig. 4 is a flowchart showing a manufacturing method of the rotating electric machine 2 in this embodiment. First, in step S1, the bearing 23 is attached to the rotor 22. Next, in step S2, the rotor 22 to which the bearing 23 is attached is inserted into the cavity 212 inside the stator 21 through the opening 211 of the stator 21. In step S3, the waterproof part 1 is arranged on the side of the stator 21 where the opening 211 is provided. For example, the waterproof part 1 is arranged so as to match the outer periphery of the opening 211 of the stator 21. The waterproof part 1 arranged on the stator 21 has a ring-shaped or polygonal shape.

[0028] In step S4, the cable 27 is placed between the first groove portion 121 and the second groove portion 131 of the waterproof component 1. Here, placing the cable 27 means, for example, fitting the cable 27 into the first groove portion 121 and also fitting the cable 27 into the second groove portion 131, and sandwiching the cable 27 between the first groove portion 121 and the second groove portion 131. The order in which the cable 27 is fitted into the first groove portion 121 and the second groove portion 131 may be reversed. At this time, the cable 27 is pulled out from the inside of the rotating electric machine 2 to the outside.

[0029] In step S5, the bracket 24 is disposed at a position where the waterproof component 1 is sandwiched between the bracket 24 and the stator 21. For example, the bracket 24 is disposed so as to coincide with the outer periphery of the stator 21. Finally, in step S6, the fastening components 25 are fastened to attach the bracket 24 to the stator 21.

[0030] According to the first embodiment, in the assembly work of the rotating electric machine 2 having a waterproof structure, friction between the inside of the cylindrical packing and the cable, which occurs when the cable is passed through the cylindrical packing fitted into the recess, does not occur. Therefore, the manufacturing method of the rotating electric machine 2 disclosed herein can reduce the workload when assembling the rotating electric machine 2 having a waterproof structure.

[0031] According to the first embodiment, the waterproof component 1 has elasticity, and therefore when the fastening component 25 is fastened, the waterproof component 1 is pressed against the stator 21 by the bracket 24 and expands in the circumferential direction. As a result, the first end 12 and the second end 13 come into close contact with each other, and the waterproof component 1 is elastically deformed, eliminating the gap 100 between the first groove 121 and the second groove 131, thereby realizing waterproofing of the portion where the cable 27 is drawn out from the inside to the outside of the rotating electric machine 2. Furthermore, the waterproof component 1 receives pressure in a direction sandwiched between the bracket 24 and the stator 21 by the fastening force of the fastening component 25, and therefore the waterproof component 1 comes into close contact with the bracket 24 and the stator 21, and waterproofing between the stator 21, the waterproof component 1, and the bracket 24 can be realized.

[0032] In the manufacturing method of the rotating electric machine 2 in the first embodiment, the waterproof component 1 is disposed on the stator 21, and then the cable 27 is disposed between the first groove portion 121 and the second groove portion 131 of the waterproof component 1. However, the order may be such that the cable 27 is disposed between the first groove portion 121 and the second groove portion 131 of the waterproof component 1, and then the waterproof component 1 is disposed on the stator 21.

[0033] Furthermore, when the rotating electric machine 2 is manufactured, the stator 21 may be assembled with the opening 211 side facing up, or may be assembled with the opening 211 side facing sideways. That is, the orientation of the opening 211 side of the stator 21 when the rotating electric machine 2 is manufactured may be appropriately selected in consideration of the manufacturing equipment and manufacturing efficiency of the rotating electric machine 2, and is not particularly limited. Note that assembling the rotating electric machine 2 with the opening 211 side of the stator 22 facing up has the advantage of making it easier to assemble the rotating electric machine 2 than assembling the rotating electric machine 2 with the opening 211 side of the stator 22 facing sideways, since the rotating electric machine 2 can be assembled by arranging the rotor 21, the waterproof part 1, and the bracket 24 from above the stator 22 and further attaching the fastening part 25 from above.

[0034] Also, instead of the cable 27, a bus bar 28 may be drawn from the inside to the outside of the rotating electric machine 2. FIG. 5 is a vertical cross-sectional view of the rotating electric machine 2 when the bus bar 28 is drawn out in this embodiment. The bus bar 28 is fixed to the stator 21 and electrically connected thereto. The bus bar 28 is, for example, formed by bending a conductive sheet metal or rectangular wire into a predetermined shape, and is hard and cannot be easily bent like the cable 27. The bus bar 28 is not limited to being directly connected to the stator 21, and may be fixed to the terminal 26 and electrically connected to the stator 21. The present disclosure is not limited to being flexible like the cable 27, and can be adapted to the case where a hard member like the bus bar 28 is used. Also, the waterproof component 1 may be applied to a tube and a housing that is the outer shell of the rotating electric machine 2 instead of the cable 27.

[0035] Variation 1. FIG. 6 is an overall view of the waterproof component 1 in the first modification. As shown in FIG. 6, the first end 12 has a first plane 122 that is different in height from the base 11 in the axial direction. The first plane 122 has a first groove 121. The second end 13 has a second plane 132 that is different in height from the base 11 in the axial direction. The second plane 132 has a second groove 131. FIG. 7 is an overall view of the waterproof component 1 when the first end 12 and the second end 13 are joined in the first modification. As shown in FIG. 7, when the first end 12 and the second end 13 are joined, the first plane 122 and the second plane 132 overlap in the axial direction. The first groove 121 and the second groove 131 are joined to form a hole. The hole formed by the first plane 122 and the second groove is a hole that penetrates the waterproof component 1 in the radial direction.

[0036] The manufacturing method of the rotating electric machine 2 using the waterproof component 1 in the first modification will not be described except for the steps different from those in the first embodiment. In step S4 in the first embodiment, arranging the cable 27 means fitting the cable 27 into the first recess 121 and the second recess 131 to sandwich the cable 27. In the first modification, arranging the cable 27 means fitting the cable 27 into the first recess 121 and fitting the second recess 131 into the cable 27 from the opposite side to the stator 21 in the axial direction to sandwich the cable 27. The first recess 121 and the second recess 131 may be reversed. That is, in the first embodiment, the cable 27 is fitted into the first groove 121 and the second groove 131 in any direction, but in the first modification, the cable is arranged from the axial direction.

[0037] In the waterproof component 1 in the case of the modified example 1, when the fastening component 25 is fastened, the first plane 122 and the second plane 132 overlap in the axial direction and come into close contact with each other, so that the area of ​​close contact is larger than that of the waterproof component 1 in the case of the embodiment 1, thereby improving the waterproofing. In addition, the first recess 121 provided in the first plane 122 allows the worker to position the cable 27 when arranging it.

[0038] Variation 2. Fig. 8 is an overall view of the waterproof component 1 in the second modification. As shown in Fig. 8, the first plane 122 has a protrusion 123. The second plane 132 has a recess 133. When the first end 12 and the second end 13 are joined, the protrusion 123 fits into the recess 133. The number of each of the protrusion 123 and the recess 133 may be one, or two or more. Furthermore, the shapes of the protrusion 123 and the recess 133 are not important as long as the recess 133 fits into the protrusion 123.

[0039] A method for manufacturing the rotating electric machine 2 using the waterproof component 1 in the second modification is the same as a method for manufacturing the rotating electric machine 2 in the first modification of the first embodiment, and therefore a description thereof will be omitted.

[0040] The waterproof component 1 in the second modification can be positioned when the first end 12 and the second end 13 are mated by fitting the protrusion 123 into the recess 133. Therefore, the waterproof component 1 in the second modification can prevent misalignment between the first end 12 and the second end 13, thereby suppressing product variation during the manufacture of the waterproof component 1.

[0041] Variation 3. Fig. 9 is an overall view of the waterproof component 1 in Modification 3. The first end 12 has a first corner 124 whose outer side extends more radially than the inner side when the waterproof component 1 is annular or polygonal. The second end 13 has a second corner 134 whose inner side extends more radially than the outer side when the waterproof component 1 is annular or polygonal. As shown in Fig. 9, when the first end 12 and the second end 13 are joined together, the first corner 124 and the second corner 134 join together to have the same thickness as the base portion 11.

[0042] A method for manufacturing the rotating electric machine 2 using the waterproof component 1 in the third modification is the same as the method for manufacturing the rotating electric machine 2 in the first embodiment, and therefore a description thereof will be omitted.

[0043] In the waterproof component 1 in the third modification, the first corner portion 124 and the second corner portion 134 mate with each other, and therefore they spread out radially when the waterproof component 1 is brought into close contact with the stator 21 by the fastening component 25. This improves the waterproofing compared to the first embodiment.

[0044] Variation 4. 10 is an overall view of the waterproof component 1 in Modification 4. The first plane 122 is thicker on the inside than on the outside of the annular or polygonal shape. The second plane 132 is thinner on the outside than on the inside of the annular or polygonal shape.

[0045] A method for manufacturing the rotating electric machine 2 using the waterproof component 1 in the fourth modification is the same as a method for manufacturing the rotating electric machine 2 in the first modification of the first embodiment, and therefore a description thereof will be omitted.

[0046] According to the waterproof part 1 in variant example 4, when the first end 12 and the second end 13 are brought into close contact with the stator 21 by the fastening part 25, they spread out radially, thereby improving the waterproofing compared to the case of embodiment 1.

[0047] Embodiment 2 FIG. 11 is an overall view of the waterproof component 1 in the second embodiment. As shown in FIG. 11, the base portion 11 has a hole 14 penetrating the base portion 11 in the axial direction. The hole 14 is a hole through which a fastening component 25 passes. FIG. 12 is a cross-sectional view of a rotating electric machine 2 using the waterproof component 1 in the second embodiment. FIG. 12 shows a state in which the rotor 22 is inserted into the stator 21 and the waterproof component 1 is arranged. The hole 14 is arranged inside the outer diameter of the stator 21. The hole 14 may be circular or polygonal. Also, a cutout shape may be used instead of the hole 14.

[0048] Fig. 13 is an overall view of the waterproof component 1 when it is polygonal in shape. Also, Fig. 14 is a cross-sectional view of the rotating electric machine 2 when the waterproof component 1 is polygonal in shape. It is the same as Fig. 12 except that the waterproof component 1 is polygonal rather than annular.

[0049] The manufacturing method of the rotating electric machine 2 using the waterproof component 1 in the second embodiment is the same as that in the first embodiment, except that the fastening component 25 is passed through the hole 14 when being fastened to the stator 21.

[0050] By using the waterproof part 1 in embodiment 2, the fastening part 25 can be fastened further inward than when the rotating electric machine 2 is manufactured in the case of embodiment 1, so that the outer casing of the rotating electric machine 2 can be made smaller.

[0051] Furthermore, by manufacturing a stator 21 having a shape that matches the shape of the outer periphery of the hole 14, the positioning of the waterproof component 1 can be made easier than in the first embodiment when manufacturing the rotating electric machine 2. Note that, instead of being limited to the hole 14, holes, notches, protrusions, etc. may be provided at any location on the waterproof component 1, and a component that comes into contact with the waterproof component 1 may be provided with a shape that corresponds to the hole, notch, or protrusion of the waterproof component 1 for positioning.

[0052] Embodiment 3 FIG. 15 is an enlarged view of a portion of the waterproof part 1 where the cable 27 is arranged. The waterproof part 1 in this embodiment includes a base part 15 and an attachment part 16. The base part has one end and the other end. The attachment part 16 has a first end 161 and a second end 162. The attachment part 16 has a cut 163 starting from the first tip 161 and extending toward the second end 162. The attachment part 16 has a through hole 164 that penetrates the attachment part 16 in the radial direction. When one end of the base part 15 and the first end 161 of the attachment part 16 are aligned, and when the other end of the base part 15 and the second end 162 of the attachment part 16 are aligned, the base part 15 and the attachment part 16 have a ring-shaped or polygonal shape.

[0053] A manufacturing method of a rotating electric machine 2 using a waterproof component 1 in the third embodiment will not be described except for the differences from the first embodiment. In the third embodiment, the method of arranging the cable 27 is to first arrange the cable 27 in grooves provided at one end and the other end of the base component 15. Here, "arrange" has the same meaning as in the first embodiment. Next, one end of the base component 15 and the first tip 161 of the attachment component 16 are aligned. Furthermore, the other end of the base component 15 and the second tip 162 of the attachment component 16 are aligned.

[0054] According to the waterproof part 1 in the third embodiment, the base part 15 is standardized, and only the attachment part 16 can be changed in shape to match the thickness or shape of the cable 27. Therefore, when there are multiple types of cables 27, only the attachment part 16 needs to be changed and manufactured, and the number of items to be managed for changes can be reduced. Also, since it is necessary to prepare a mold for the attachment part 16 instead of the entire waterproof part 1, the size of the mold can be reduced.

[0055] In addition, the portion where one end of the base part 15 and the first tip portion 161 of the attachment part 16 are joined, and the portion where the other end of the base part 15 and the second tip portion 162 of the attachment part 16 are joined may be joined with a concave-convex shape.

[0056] A variation of the third embodiment. FIG. 16 is an enlarged view of a portion where the cable 27 is arranged in the waterproof part 1 in the modified example of the third embodiment. The base part 15 has grooves at one end and the other end. The attachment part 16 has a first tip 165 having a first groove 1651 and a second tip 166 having a second groove 1661. When one end of the base part 15 and the first tip 165 of the attachment part 16 are mated, and when the other end of the base part 15 and the second tip 166 of the attachment part 16 are mated, the groove part at one end and the first groove part 1651 form a first hole when mated, and the groove part at the other end and the second groove part 1661 form a second hole when mated. Note that the first hole and the second hole are aligned in the circumferential direction, but two or more first groove parts 1651 and two or more second groove parts 1661 may be provided so as to be aligned in the axial direction.

[0057] A manufacturing method of a rotating electric machine 2 using a waterproof component 1 in a modified example of the third embodiment will not be described except for the differences from the first embodiment. In the third embodiment, the method of arranging the cable 27 is to first arrange the cable in a groove provided at each of one end and the other end of the base component 15. Arranging here has the same meaning as in the first embodiment. Next, one end of the base component 15 and the first tip 165 of the attachment component 16 are aligned. Furthermore, the other end of the base component 15 and the second tip 166 of the attachment component 16 are aligned. At this time, either one or two cables may be arranged.

[0058] According to the waterproof part 1 in the modification of the third embodiment, the base part 15 is standardized, and only the attachment part 16 can be modified to match the thickness or shape of the cable 27. Therefore, when there are multiple types of cables 27, only the attachment part 16 needs to be modified and manufactured, and the number of items to be managed for changes can be reduced. Also, since it is necessary to prepare a mold for the attachment part 16 instead of the entire waterproof part 1, the size of the mold can be reduced.

[0059] In addition, the portion where one end of the base part 15 and the first tip 165 of the attachment part 16 are joined, and the portion where the other end of the base part 15 and the second tip 166 of the attachment part 16 are joined may be joined with a concave and convex shape.

[0060] Embodiment 4 Fig. 17 is an overall view of the waterproof part 1 molded in a linear shape. Also, Fig. 18 is an overall view of the waterproof part 1 molded in a spiral shape. In this embodiment, a case will be described in which the shape of a groove provided in a mold used in manufacturing the waterproof part 1 is not a ring or polygonal shape, but a linear shape or a spiral shape.

[0061] FIG. 19 is a flow chart showing a method for manufacturing the waterproof component 1. First, in step S11, a material is poured into a mold. Here, the mold into which the material is poured has a plurality of linear or spiral grooves having one end and the other end. Furthermore, each of the one end and the other end is provided with a protrusion so as to cross the groove. Furthermore, the poured material is a material that has elasticity when forming the waterproof component 1 in the next step. For example, rubber is considered as a material that has no elasticity when poured into the mold but has elasticity when removed from the mold. Next, in step S12, the material poured into the mold hardens, forming the waterproof component 1. In step S13, the waterproof component 1 is removed from the mold.

[0062] By using the mold for manufacturing the waterproof component 1 of this embodiment, even if the waterproof component 1 has a large outer diameter when in use, the size of the mold can be made equal to or smaller than the outer diameter when in use, and the mold can be made smaller. Also, the number of parts that can be taken from one mold can be increased compared to when the waterproof component 1 described in the first embodiment is molded.

[0063] Various aspects of the present disclosure are summarized below as appendices.

[0064] (Appendix 1) a step of attaching a bearing for supporting a shaft of a rotor to a rotor which is a rotating part of a rotating electric machine; inserting the rotor with the bearing attached into a stator, which is a fixed portion of the rotating electric machine, through an opening in the stator; a step of disposing a waterproof component having one end with a first groove portion and the other end with a second groove portion on the opening side of the rotor; placing a cable connected to the stator between the first groove and the second groove of the waterproof component; a step of placing a bracket at a position where the waterproof part is sandwiched between the bracket and the stator; fastening a fastening component that fastens the bracket to the stator; A method for manufacturing a rotating electric machine comprising the steps of: (Appendix 2) a base portion having one end and an other end; a first end portion provided at the one end and having a first groove; a second end portion provided at the other end and having a second groove portion; Equipped with When the first end and the second end are joined together, the base portion, the first end, and the second end form a ring or a polygonal shape, and the first groove portion and the second groove portion join together to form a hole. Elastic waterproof parts. (Appendix 3) the first end portion has a first flat surface having a different height from the base portion in an axial direction of the annular or polygonal shape, and the first groove portion is provided on the first flat surface; the second end portion has a second flat surface having a different height from the base portion in the axial direction of the annular or polygonal shape, and the second groove portion is provided on the second flat surface; When the first end portion and the second end portion are overlapped in the axial direction, the first plane portion and the second plane portion overlap, and the first groove portion and the second groove portion are joined to form the hole. Waterproof parts as described in Appendix 2. (Appendix 4) the first planar surface has a protrusion; the second plane has a recess; When the first end and the second end are brought together, the protrusion fits into the recess. 4. A waterproof part according to claim 2 or 3. (Appendix 5) The first end portion has a first corner portion in which an outer side of the annular or polygonal shape extends radially further than an inner side of the annular or polygonal shape, The second end portion has a second corner portion in which the inner side of the annular or polygonal shape extends radially more than the outer side, and when the first end portion and the second end portion are joined together, the first corner portion and the second corner portion are joined together to have the same thickness as the base portion. A waterproof part according to any one of claims 2 to 4. (Appendix 6) a thickness of an inner side of the annular or polygonal shape of the portion of the first end portion having the first flat surface is greater than a thickness of an outer side of the annular or polygonal shape; a portion of the second end portion having the second flat surface has an outer thickness of the annular or polygonal shape that is thinner than an outer thickness of the annular or polygonal shape; 4. A waterproof part according to claim 2 or 3. (Appendix 7) The base portion has a hole passing through the base portion in the axial direction of the annular or polygonal shape. A waterproof part according to any one of claims 2 to 6. (Appendix 8) a base component having one end and an other end; An attachment part having a first tip portion and a second tip portion, a cut portion extending from the first tip portion toward the second tip portion, and a through hole in a part of the cut portion; When the one end and the first tip are joined together and the other end and the second tip are joined together, the base part and the attachment part form a ring or a polygonal shape; The through hole of the cut portion penetrates the attachment part in a radial direction of the annular or polygonal shape. Waterproof parts. (Appendix 9) a base part having one end with a groove and another end with a groove; an attachment part having a first tip with a first groove and a second tip with a second groove; Equipped with When the one end and the first tip are joined together and the other end and the second tip are joined together, the base part and the attachment part form a ring or a polygonal shape, and The groove portion of the one end and the first groove portion are joined together to form a first hole, The groove portion of the other end and the second groove portion are joined together to form a second hole. Waterproof parts. (Appendix 10) A step of pouring a material into a mold in which a plurality of linear or spiral grooves having one end and the other end are formed, and protrusions are formed at each of the one end and the other end so as to cross the grooves; forming the material into a waterproof component; removing the elastic waterproof part from the mold; A method for manufacturing a waterproof part comprising the steps of: (Appendix 11) a rotor which is a rotating part of a rotating electric machine; a stator having an opening and including the rotor therein; a bracket that is a lid portion that covers the opening of the stator; a waterproof part disposed at a position sandwiched between the stator and the bracket, the waterproof part having one end with a first groove and the other end with a second groove; a cable disposed between the first groove and the second groove and connected to the stator; A rotating electric machine equipped with the above structure. [Explanation of symbols]

[0065] 1 waterproof part, 2 rotating electric machine, 11 base part, 12 first end, 13 second end, 14 hole, 15 base part, 16 attachment part, 21 stator, 22 rotor, 23 bearing, 24 bracket, 25 fastening part, 26 terminal, 27 cable, 28 bus bar, 100 gap, 121 first groove, 122 first flat surface, 123 protrusion, 124 first corner, 131 second groove, 132 second flat surface, 133 recess, 134 second corner, 161 first tip, 162 second tip, 163 notch, 164 through hole, 165 first tip, 166 second tip, 211 opening, 212 cavity, 1651 first groove, 1661 Second Groove

Claims

1. a step of attaching a bearing for supporting a shaft of a rotor to a rotor which is a rotating part of a rotating electric machine; inserting the rotor with the bearing attached into a stator, which is a fixed portion of the rotating electric machine, through an opening in the stator; a step of disposing a waterproof component having one end with a first groove portion and the other end with a second groove portion on the opening side of the rotor; placing a cable connected to the stator between the first groove and the second groove of the waterproof part; a step of placing a bracket at a position where the waterproof part is sandwiched between the bracket and the stator; fastening a fastening component that fastens the bracket to the stator; A method for manufacturing a rotating electric machine comprising the steps of:

2. a base portion having one end and an other end; a first end portion provided at the one end and having a first groove; a second end portion provided at the other end and having a second groove portion; Equipped with When the first end and the second end are joined together, the base portion, the first end, and the second end form a ring or a polygonal shape, and the first groove portion and the second groove portion join together to form a hole. Elastic waterproof parts.

3. the first end portion has a first flat surface having a different height from the base portion in an axial direction of the annular or polygonal shape, and the first groove portion is provided on the first flat surface; the second end portion has a second flat surface having a different height from the base portion in the axial direction of the annular or polygonal shape, and the second groove portion is provided on the second flat surface; When the first end portion and the second end portion are overlapped in the axial direction, the first plane portion and the second plane portion overlap, and the first groove portion and the second groove portion are joined to form the hole. The waterproof part according to claim 2.

4. the first planar surface has a protrusion; the second plane has a recess; When the first end and the second end are brought together, the protrusion fits into the recess. The waterproof part according to claim 3.

5. The first end portion has a first corner portion in which an outer side of the annular or polygonal shape extends radially further than an inner side of the annular or polygonal shape, The second end portion has a second corner portion in which the inner side of the annular or polygonal shape extends radially more than the outer side, and when the first end portion and the second end portion are joined together, the first corner portion and the second corner portion are joined together to have the same thickness as the base portion. The waterproof part according to claim 2.

6. a thickness of an inner side of the annular or polygonal shape of the portion of the first end portion having the first flat surface is greater than a thickness of an outer side of the annular or polygonal shape; a portion of the second end portion having the second flat surface has an outer thickness of the annular or polygonal shape that is thinner than an outer thickness of the annular or polygonal shape; The waterproof part according to claim 3.

7. The base portion has a hole passing through the base portion in the axial direction of the annular or polygonal shape. The waterproof part according to claim 2.

8. a base component having one end and an other end; An attachment part having a first tip portion and a second tip portion, a cut portion extending from the first tip portion toward the second tip portion, and a through hole in a part of the cut portion; When the one end and the first tip are joined together and the other end and the second tip are joined together, the base part and the attachment part form a ring or a polygonal shape; The through hole of the cut portion penetrates the attachment part in a radial direction of the annular or polygonal shape. Waterproof parts.

9. a base part having one end with a groove and another end with a groove; an attachment part having a first tip with a first groove and a second tip with a second groove; Equipped with When the one end and the first tip are joined together and the other end and the second tip are joined together, the base part and the attachment part form a ring or a polygonal shape, and The groove portion of the one end and the first groove portion are joined together to form a first hole, The groove portion of the other end and the second groove portion are joined together to form a second hole. Waterproof parts.

10. A step of pouring a material into a mold in which a plurality of linear or spiral grooves having one end and the other end are formed, and protrusions are formed at each of the one end and the other end so as to cross the grooves; forming the material into a waterproof component; removing the elastic waterproof part from the mold; A method for manufacturing a waterproof part comprising the steps of:

11. a rotor which is a rotating part of a rotating electric machine; a stator having an opening and including the rotor therein; a bracket that is a lid portion that covers the opening of the stator; a waterproof part disposed at a position sandwiched between the stator and the bracket, the waterproof part having one end with a first groove and the other end with a second groove; a cable disposed between the first groove and the second groove and connected to the stator; A rotating electric machine equipped with the above structure.

Images