Power cable connection device and method for manufacturing power cable connection device

Abstract

The invention provides a power cable connecting device and a manufacturing method of the power cable connecting device. The power cable connecting device can restrain manufacturing process complexity and reduce stress generated by an insulating tube. A power cable connection device (1) is provided with: an insulating tube (22); a tube member (21) which is disposed inside the insulating tube (22) and into which the power cable (10) is inserted; and an attachment member (23) which is disposed so as to surround the tube member (21) from the outer peripheral side, and which is fitted to the insulating tube (22) so that an attachment surface (234) attached to another member is exposed from the insulating tube (22). A method for manufacturing a power cable connection device (1) is provided with: a step for forming an insulating tube (22) integrated with a tube member (21) into which a power cable (10) is inserted; and a step in which, after forming the insulating tube (22), the mounting member (23) is fitted to the insulating tube (22) at a position on the outer peripheral side of the tube member (21).

Description

Technical Field

[0001] The invention relates to a power cable connecting device and a method for manufacturing the power cable connecting device. Background Art

[0002] Patent document 1 discloses a power cable connection device for connecting a power cable to other electric wires or the like. The power cable connection device described in Patent document 1 includes: an insulating tube; a tube component that is arranged inside the insulating tube and into which the power cable is inserted; and an embedded component that surrounds the tube component from the outer peripheral side and is embedded in the insulating tube. The insulating tube has a first semiconductive portion at an interface with the tube component, and has a second semiconductive portion at an interface with the embedded component.

[0003] Furthermore, the power cable connection device described in Patent Document 1 provides a mold release agent on the surface of the embedded component facing the pipe component side to suppress the fixing of the embedded component and the insulating tube. Thus, the stress caused by the difference in thermal expansion coefficients of the insulating tube, the embedded component and the pipe component is suppressed in the portion between the embedded component and the pipe component in the insulating tube.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2022-128719 Summary of the invention

[0007] Problems to be solved by the invention

[0008] In Patent Document 1, a mold release agent is used to suppress stress on the insulating tube, which may complicate the production of the power cable connection device.

[0009] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a power cable connection device and a method for manufacturing a power cable connection device, which can suppress complication of the manufacturing process and reduce stress generated in an insulating tube.

[0010] Solutions to Solve Problems

[0011] In order to achieve the above-mentioned object, the present invention provides a power cable connection device, comprising: an insulating tube; a tube component, which is arranged on the inner side of the insulating tube and the power cable is inserted into the tube component; and a mounting component, which is arranged in a manner of surrounding the tube component from the outer peripheral side and is embedded in the insulating tube in a manner that the mounting surface mounted on other components is exposed from the insulating tube.

[0012] In addition, in order to achieve the above-mentioned purpose, the present invention provides a method for manufacturing a power cable connection device, comprising: a process of forming an insulating tube integral with a tube component inserted into a power cable; and after forming the insulating tube, a process of embedding an installation component into the insulating tube to a position on the outer peripheral side of the tube component.

[0013] Effects of the Invention

[0014] According to the present invention, it is possible to provide a power cable connection device and a method for manufacturing a power cable connection device, which can reduce stress generated in an insulating tube while suppressing complication of the manufacturing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the power cable connection device in the first embodiment.

[0016] Figure 2 Yes Figure 1 An enlarged view of the surrounding area of ​​the mounting components.

[0017] Figure 3 yes Figure 2 Sectional view taken along line III-III.

[0018] Figure 4 It is a cross-sectional view before assembling the insulating tube unit and the mounting member in the first embodiment.

[0019] Figure 5 It is a cross-sectional view of the insulating tube unit and the mounting member in a state where the mounting member is in contact with the raised portion in the first embodiment.

[0020] Figure 6 It is a cross-sectional view of the assembled insulating tube unit and the mounting member in the first embodiment.

[0021] Figure 7 This is a cross-sectional view showing an enlarged portion of the power cable connection device according to the second embodiment.

[0022] Figure 8 yes Figure 7 Cross-sectional view taken along line VIII-VIII.

[0023] Fig. 9 yes Figure 7 Sectional view taken along line IX-IX.

[0024] Fig.10 It is a perspective view of the mounting member in the second embodiment.

[0025] Fig.11 It is a cross-sectional view passing through two divided parts in the power cable connection device according to the third embodiment.

[0026] Fig.12 yes Fig.11 Sectional view taken along line XII-XII.

[0027] Fig.13 It is a cross-sectional view passing through two divided portions in the power cable connection device according to the fourth embodiment.

[0028] Explanation of symbols

[0029] 1—power cable connecting device, 10—power cable, 21—tube component, 22—insulating tube, 223a—fitting hole, 223d—raised portion, 23—installation component, 23a—dividing portion, 234—installation surface, 24—flange component, 3—cover, 6—path sealing component, S—gap, P—communication path. DETAILED DESCRIPTION

[0030] [First embodiment]

[0031] Reference Figures 1 to 6 The first embodiment of the present invention will be described. The embodiments described below are specific examples of preferred embodiments of the present invention, and there are also parts that specifically illustrate various technical matters that are technically preferred, but the technical scope of the present invention is not limited to these specific forms.

[0032] (Power cable connection device 1)

[0033] Figure 1 FIG. 1 is a cross-sectional view of the power cable connection device 1 of this embodiment. Figure 1 As shown in FIG. 1 , the power cable connection device 1 includes a main body 2, a cover 3, and a connection part 4. The main body 2 ensures electrical insulation between the power cable 10 after the layers are stripped and the components arranged around the power cable 10. The cover 3 covers a part of the main body 2. The connection part 4 is a component for connecting the power cable 10 to the outside of the power cable connection device 1. Afterwards, the central axis (i.e., the central axis) of the power cable 10 is Figure 1 The direction in which the power cable 10 (single-dot chain line) extends is referred to as the axial direction X. In addition, the side of the power cable 10 in the axial direction X that is connected to the connection portion 4 is referred to as the front end side X1, and the opposite side is referred to as the base end side X2.

[0034] (Main body 2)

[0035] The main body 2 includes a pipe member 21 , an insulating tube 22 , a mounting member 23 , and a flange member 24 .

[0036] The pipe member 21 is formed of metal such as brass or aluminum alloy into a cylindrical shape that is long in the axial direction X. The pipe member 21 is made of a material that is more rigid than the insulating tube 22. The pipe member 21 is disposed on the inner circumference of the insulating tube 22 to reinforce the flexible insulating tube 22.

[0037] The end portion of the tube member 21 on the front end side X1 protrudes from the insulating tube 22 and is electrically connected to the power cable 10 via the connecting portion 4 described later. In addition, the end portion of the tube member 21 on the base end side X2 is radially opposed to the mounting member 23 via the insulating tube 22. The inner diameter of the tube member 21 is formed to be larger than the outer diameter of the portion of the power cable 10 disposed inside the tube member 21. Thus, the power cable 10 can be easily inserted into the inner side of the tube member 21.

[0038] The insulating tube 22 includes an insulator 220 and semiconductive portions (a first semiconductive portion 221 , a second semiconductive portion 222 , and a third semiconductive portion 223 in this embodiment) provided on the surface of the insulator 220 .

[0039] The insulator 220 is formed of, for example, a polymer material in a tubular shape and has flexibility. As the polymer material constituting the insulator 220, for example, silicone rubber, ethylene propylene rubber (EPM), ethylene propylene diene monomer rubber (EPDM), etc. can be used. In particular, as the material of the insulator 220, by adopting a material with relatively high tear strength, it is easy to suppress the generation of cracks in the insulator 220. In addition, as the material of the insulator 220, by adopting a material with relatively low elastic modulus, it is easy to insert the power cable 10 into the insulator 220. In the free state before the cable is inserted into the insulating tube 22, the inner diameter of the portion of the inner circumference of the insulating tube 22 closer to the base end side X2 than the tube member 21 is smaller than the outer diameter of the power cable 10 inserted therein, and the power cable 10 is inserted into the insulating tube 22 while expanding the portion of the inner circumference of the insulating tube 22 closer to the base end side X2 than the tube member 21.

[0040] On the outer periphery of the insulator 220, annular umbrella portions 220a protruding toward the outer periphery are provided at predetermined intervals at multiple locations in the axial direction X. By forming multiple umbrella portions 220a on the insulator 220, the creeping distance of the outer periphery of the insulator 220 can be ensured, and the occurrence of creeping discharge along the surface of the insulator 220 can be suppressed.

[0041] A cylindrical hole portion 220b opened at the base end side X2 is formed on the outer peripheral side of the tube member 21 in the insulator 220. The mounting member 23 is fitted into the hole portion 220b via the third semiconductive portion 223.

[0042] Insulator 220 is formed by insert molding in which pipe member 21, first semiconductive portion 221, second semiconductive portion 222, and third semiconductive portion 223 are arranged in a mold. Thus, insulator 220 is formed so as to be fixed to pipe member 21, first semiconductive portion 221, second semiconductive portion 222, and third semiconductive portion 223, respectively.

[0043] The first semiconductive portion 221, the second semiconductive portion 222, and the third semiconductive portion 223 are made of, for example, a conductive elastic semiconductive material having conductivity obtained by dispersing conductive powder such as carbon in silicone rubber, EPM, EPDM, etc. The first semiconductive portion 221, the second semiconductive portion 222, and the third semiconductive portion 223 suppress surrounding electric field concentration.

[0044] The first semiconductive portion 221 is provided in a film-like manner on the inner peripheral surface of the insulator 220 and is interposed between the insulator 220 and the tube member 21. The first semiconductive portion 221 is formed in a cylindrical shape so as to surround the portion of the tube member 21 except the front end portion from the outer peripheral side. In addition, the first semiconductive portion 221 has a portion extending from the base end side X2 of the tube member 21, and the portion is interposed between the power cable 10 inserted into the inner side of the tube member 21 and the insulator 220. The first semiconductive portion 221 is formed, for example, by insert molding in which the tube member 21 is arranged in a mold. Thus, the first semiconductive portion 221 is fixed to the tube member 21.

[0045] The second semiconductive portion 222 is formed in an annular shape inside the end portion on the base end side X2 of the insulator 220. The second semiconductive portion 222 contacts the outer peripheral surface of the power cable 10 inserted into the insulating tube 22. The second semiconductive portion 222 is formed by molding or the like.

[0046] The third semiconductive portion 223 is formed in a film-like shape on at least the inner surface of the hole portion 220b of the insulator 220, and is interposed between the insulator 220 and the mounting member 23. In this embodiment, the third semiconductive portion 223 is also extended to a position closer to the base end side X2 than the hole portion 220b in the outer peripheral surface of the insulator 220. The third semiconductive portion 223 is formed by molding, for example.

[0047] Figure 2 Yes Figure 1 An enlarged view of the periphery of the mounting component 23. Figure 3 yes Figure 2 The III-III line cross-sectional view. Figure 2 As shown, a fitting hole 223a is formed at a portion of the third semiconductive portion 223 formed on the inner surface of the hole portion 220b of the insulator 220. The fitting hole 223a is a hole for mounting the mounting member 23. In this embodiment, the fitting hole 223a includes a first cylindrical hole portion 223b formed in a cylindrical shape and a second cylindrical hole portion 223c formed on the base end side X2 of the first cylindrical hole portion 223b and having an outer diameter larger than that of the first cylindrical hole portion 223b. The first cylindrical hole portion 223b is a hole that fits the later-described cylindrical portion 231 of the mounting member 23, and the second cylindrical hole portion 223c is a hole that fits the later-described protrusion 232 of the mounting member 23. The fitting hole 223a is formed in a shape along the surface of a portion of the mounting member 23 that fits into the fitting hole 223a.

[0048] The third semiconductive portion 223 has a raised portion 223d which is raised toward the outer peripheral side and is opposed to the mounting component 23 from the base end side X2 on the base end side X2 of the mounting component 23. The raised portion 223d has a function of preventing the mounting component 23 from falling off from the fitting hole 223a. The raised portion 223d is located at the base end side X2 relative to the fitting hole 223a. In addition, the raised portion 223d may be omitted.

[0049] The outer diameter of the portion of the insulating tube 22 closer to the base end side X2 than the raised portion 223d is smaller than the inner diameter of the mounting member 23. Therefore, when the mounting member 23 is fitted into the fitting hole 223a from the base end side X2 of the insulating tube 22, the mounting member 23 can be moved without requiring a strong force at least until the mounting member 23 reaches the raised portion 223d.

[0050] like Figure 2 as well as Figure 3 As shown in FIG. 2 , the mounting member 23 is formed into a cylindrical shape that surrounds the base end X2 of the tube member 21 from the outer peripheral side. Figure 2 As shown, the mounting member 23 includes a cylindrical portion 231 formed in a cylindrical shape and an annular protrusion 232 formed to protrude from an end portion on the base end side X2 of the cylindrical portion 231 toward the outer peripheral side.

[0051] The mounting member 23 is made of a material having higher rigidity than the insulating tube 22, such as metal such as brass or aluminum alloy, and is connected to the ground potential when the power cable connection device 1 is in use. The thermal expansion coefficients of the tube member 21 and the mounting member 23 are smaller than that of the insulator 220.

[0052] The mounting member 23 is fitted in the insulating tube 22. Specifically, the mounting member 23 is inserted into the fitting hole 223a of the insulating tube 22 and is fitted in the insulating tube 22. More specifically, the mounting member 23 is pressed into the fitting hole 223a. That is, in a state where the mounting member 23 is not inserted into the fitting hole 223a (i.e., in a free state), the size of the fitting hole 223a is smaller than the size of the portion of the mounting member 23 that is inserted into the fitting hole 223a, and the mounting member 23 is inserted into the fitting hole 223a while expanding the fitting hole 223a.

[0053] In this way, the mounting member 23 is assembled to the insulating tube 22 by fitting and then mounting, so that the mounting member 23 contacts the inner surface of the fitting hole 223a, while the entire surface of the mounting member 23 is not fixed to the inner surface of the fitting hole 223a. Unlike this embodiment, if the mounting member 23 is fixed to the fitting hole 223a, the inner peripheral side of the portion between the pipe member 21 and the mounting member 23 in the insulating tube 22 is fixed to the pipe member 21, and the outer peripheral side is fixed to the mounting member 23, so that expansion and contraction to both the inner peripheral side and the outer peripheral side are hindered, and stress is likely to increase. On the other hand, as in this embodiment, when the mounting member 23 and the insulating tube 22 are not fixed, the outer peripheral side of the portion between the pipe member 21 and the mounting member 23 in the insulating tube 22 is suppressed from being stretched by the mounting member 23, so that the stress is reduced.

[0054] The corners of the portion of the surface of the mounting member 23 that contacts the inner surface of the fitting hole 223a are rounded to improve the close contact with the inner surface of the fitting hole 223a. In addition, the end of the base end side X2 of the inner peripheral surface of the mounting member 23 is formed into an inclined surface 233 that expands in diameter toward the base end side X2. As a result, the angle between the inclined surface 233 and the mounting surface 234 described later becomes larger, and the close contact between the surrounding of the inclined surface 233 on the surface of the mounting member 23 and the inner surface of the fitting hole 223a is improved.

[0055] The surface of the base end side X2 of the mounting member 23 constitutes a mounting surface 234 mounted on the flange member 24. The mounting surface 234 is exposed from the insulating tube 22 when the mounting member 23 is assembled to the insulating tube 22. In addition, in the present embodiment, in addition to the mounting surface 234, the outer peripheral surface of the protrusion 232 of the mounting member 23 is also exposed from the insulating tube 22, and the other surfaces are in close contact with the inner surface of the fitting hole 223a. The mounting member 23 is formed with an internal threaded hole 235 opened on the mounting surface 234. The internal threaded hole 235 is threadedly engaged with a bolt B1 for fixing the flange member 24 to the mounting member 23.

[0056] The flange member 24 is formed in an annular shape. The flange member 24 is fixed to the mounting member 23 by the bolt B1 in a state where the flange member 24 overlaps with the mounting surface 234. The flange member 24 is formed with a bolt insertion hole 241 through which a bolt (not shown) for mounting the flange member 24 on the mounting object 100 is inserted. In addition, the flange member 24 is formed with an internal thread hole 242 opened on the surface of the base end side X2. The bolt B2 for fixing the cover 3 to the flange member 24 is threadedly engaged in the internal thread hole 242. Seal portions 11a and 11b for ensuring water tightness are arranged between the flange member 24 and the mounting member 23 and the cover 3.

[0057] (cover 3)

[0058] like Figure 1As shown, the cover 3 is formed of brass, aluminum alloy, etc. into a cylindrical shape, and covers the main body 2 protruding from the flange member 24 to the base end side X2 from the outer peripheral side. A cover flange portion 31 protruding to the outer peripheral side is formed at the end portion of the front end side X1 of the cover 3. The cover flange portion 31 is fixed to the flange member 24 using bolts B2.

[0059] The end of the base end side X2 of the cap 3 and the power cable 10 are sealed by the sealing portion 12. The sealing portion 12 is formed by winding a polyethylene tape or epoxy tape provided with an adhesive material around the outer periphery of the power cable 10, and seals the cap 3 and the power cable 10 watertightly.

[0060] (Connection 4)

[0061] The connection portion 4 includes a conductor connection rod 41, a high-voltage shielding member 42, a fixed terminal 43, and a common fastening nut 44. A rivet hole 411 is formed in the conductor connection rod 41, which is open at the base end side X2. The conductor portion 101 exposed from the insulating cover portion of the power cable 10 is inserted into the rivet hole 411, and the end portion of the base end side X2 of the conductor connection rod 41 is riveted toward the conductor portion 101. Thus, the conductor connection rod 41 is connected to the power cable 10. In addition, an external thread portion 412 protruding toward the front end side X1 is formed in the conductor connection rod 41. The external thread portion 412 penetrates the high-voltage shielding member 42 and the fixed terminal 43, respectively.

[0062] The high-voltage shield 42 is made of a conductor and has a bottomed cylindrical shape that is open at the base end side X2. The high-voltage shield 42 is fitted onto the front end portion of the pipe member 21 that protrudes from the insulating tube 22 toward the front end side X1.

[0063] The fixed terminal 43 is plate-shaped and overlaps the high-voltage shield 42 from the front end side X1. A connection hole 431 for connecting to an external electric wire or the like is formed in the fixed terminal 43. The fixed terminal 43 and the high-voltage shield 42 are fastened together between the conductor connecting rod 41 and the common fastening nut 44, whereby the fixed terminal 43, the high-voltage shield 42 and the conductor connecting rod 41 are electrically connected to each other.

[0064] (Use example of the power cable connection device 1)

[0065] Next, a usage example of the power cable connection device 1 of this embodiment will be described.

[0066] The power cable connection device 1 is installed on the roof of a railway vehicle, for example. In this case, a wall portion constituting the roof of the railway vehicle, a housing provided on the roof of the railway vehicle and housing the power cable connection device 1, etc., become the installation object 100. The power cable connection device 1 can be used for purposes such as electrical connection between adjacent railway vehicles and electrical connection with a pantograph.

[0067] (Method of Manufacturing Power Cable Connection Device 1)

[0068] Next, refer to Figures 4 to 6 Among the methods of manufacturing the power cable connection device 1 , an example of a method of mounting the mounting member 23 to the insulating tube 22 will be described.

[0069] Figure 4 2 is a cross-sectional view of the pipe member 21, the insulating tube 22, and the mounting member 23 before assembly. In the method of mounting the mounting member 23 to the insulating tube 22 in this embodiment, first, the insulating tube unit 5 in which the pipe member 21 and the insulating tube 22 are integrated is prepared. The insulating tube unit 5 is formed integrally by molding the insulator 220 by insert molding in which the pipe member 21, the first semiconductive portion 221, the second semiconductive portion 222, and the third semiconductive portion 223 are arranged in a mold.

[0070] Next, the mounting member 23 is assembled to the insulating tube 22 from the base end side X2 of the insulating tube 22 so that the insulating tube 22 passes through the inner side of the mounting member 23. At this time, the outer diameter of the portion of the insulating tube 22 closer to the base end side X2 than the protrusion 223d is smaller than the inner diameter of the mounting member 23, so that the mounting member 23 can be moved without requiring a strong force until the mounting member 23 contacts the protrusion 223d. Figure 5 It is a cross-sectional view of the insulating tube unit and the mounting member in a state where the mounting member 23 is in contact with the raised portion 223d.

[0071] After the mounting member 23 abuts against the raised portion 223d, the mounting member 23 is pressed into the front end side X1 in a manner of elastically squeezing the raised portion 223d while passing over it. Then, the mounting member 23 is inserted into the fitting hole 223a while passing over the raised portion 223d. At this time, as described above, the size of the fitting hole 223a is smaller than the size of the portion of the mounting member 23 disposed in the fitting hole 223a, so the mounting member 23 is pressed into the fitting hole 223a while expanding the fitting hole 223a. Figure 6 2 is a cross-sectional view showing the insulating tube unit 5 and the mounting member 23 assembled with each other. Figure 6 In FIG. 2 , the surface position of the third semiconductive portion 223 before deformation is indicated by a two-dot chain line. As described above, the mounting member 23 is fitted into the fitting hole 223a.

[0072] In order to enable the mounting member 23 to be assembled to the insulating tube 22 as described above, no protrusion that the mounting member 23 cannot climb over is formed on the insulating tube 22 closer to the base end side X2 than the fitting hole 223 a .

[0073] (Functions and Effects of First Embodiment)

[0074] In the power cable connection device 1 of the present embodiment, the mounting member 23 is fitted into the insulating tube 22. Therefore, the mounting member 23 is prevented from being fixed to the insulating tube 22, and stress caused by the difference in thermal expansion coefficient between the insulating tube 22 and the mounting member 23 is prevented from being generated in the insulating tube 22.

[0075] Furthermore, the mounting member 23 is inserted into the fitting hole 223a formed in the insulating tube 22. Therefore, the contact area between the mounting member 23 and the insulating tube 22 increases, and the mounting member 23 is firmly fixed to the insulating tube 22.

[0076] In addition, the mounting member 23 is press-fitted into the fitting hole 223a. Therefore, the mounting member 23 is firmly fixed by the insulating tube 22. In addition, it is easy to suppress the formation of a gap between the mounting member 23 and the inner surface of the fitting hole 223a.

[0077] In addition, the insulating tube 22 has a protruding portion 223d protruding toward the outer peripheral side and facing the mounting member 23 from the proximal end side X2 on the open side (i.e., the proximal end side X2) of the fitting hole 223a of the mounting member 23. Therefore, the insulating tube 22 is prevented from falling out from the fitting hole 223a toward the proximal end side X2, and the mounting member 23 is firmly fixed by the insulating tube 22.

[0078] In addition, the outer diameter of the insulating tube 22 closer to the base end side X2 than the raised portion 223d is smaller than the inner diameter of the mounting member 23. Therefore, when the mounting member 23 is assembled to the insulating tube 22, a strong force is not required until the insulating tube 22 reaches the raised portion 223d, and the productivity of the power cable connection device 1 can be improved.

[0079] As described above, according to the present embodiment, it is possible to provide a power cable connection device and a method for manufacturing a power cable connection device that can reduce stress generated in an insulating tube while suppressing complication of the manufacturing process.

[0080] [Second embodiment]

[0081] Reference Figures 7 to 10 A second embodiment of the present invention will be described. Figure 7 It is a cross-sectional view showing a part of the power cable connection device 1 in an enlarged manner. Figure 8 yes Figure 7 Cross-sectional view taken along line VIII-VIII. Fig. 9 yes Figure 7 Sectional view taken along line IX-IX. Fig.10 It is a perspective view of the mounting component 23.

[0082] This embodiment is a embodiment in which the structure of the mounting member 23 is changed from that of the first embodiment. Specifically, in this embodiment, the mounting member 23 is divided in the circumferential direction at at least one location. As a result, the mounting member 23 is easily displaced or deformed in a manner that follows the thermal expansion and thermal contraction of the insulating tube 22, thereby reducing the stress generated in the insulating tube 22.

[0083] In this embodiment, the mounting member 23 is divided in the circumferential direction at a plurality of locations and is composed of a plurality of divided pieces 230. Specifically, the mounting member 23 is divided in the circumferential direction at two locations and is composed of two divided pieces 230. Hereinafter, the region of the mounting member 23 divided in the circumferential direction (i.e., the region between the two divided pieces 230 in the circumferential direction of the mounting member 23) is referred to as a divided portion 23a.

[0084] The two divided portions 23a of the mounting component 23 are formed at positions on the opposite sides of 180° to each other in the circumferential direction. In this embodiment, the divided portion 23a is formed to be parallel to the axial direction X. That is, the mounting component 23 has a shape such that the mounting component in the first embodiment is divided in half in the axial direction X. In addition, the mounting component 23 only needs to be divided in the circumferential direction, and the divided portion 23a may not be parallel to the axial direction X. In addition, the mounting component 23 may also be divided in the circumferential direction at one place or at least three places. The fewer the number of divisions of the mounting component 23, the fewer the number of parts constituting the mounting component 23, and the greater the number of divisions, the easier it is to reduce the stress generated in the insulating tube 22, so the number of divisions can be appropriately determined in consideration of these.

[0085] In this embodiment, the partition 23a is formed of a gap. The partition 23a is formed as a small gap to the extent that the partitions 230 do not abut against each other when the partitions 230 are thermally expanded and thermally contracted. For example, the width of the partition 23a (for example, Figure 7 The dimension in the vertical direction) is smaller than the thickness of the tube member 21. The split piece 230 has an arc-shaped portion 231a formed in an arc shape and a protruding portion 232 formed to protrude from the end portion of the base end side X2 of the arc-shaped portion 231a toward the outer peripheral side.

[0086] Before the mounting member 23 is inserted into the fitting hole 223a, the fitting hole 223a is formed to be smaller than the split piece 230. For example, before the mounting member 23 is inserted into the fitting hole 223a, the inner diameter of the inner peripheral surface of the split piece 230 is smaller than the diameter of the portion of the fitting hole 223a that contacts the inner peripheral surface of the split piece 230. In addition, before the mounting member 23 is inserted into the fitting hole 223a, the outer diameter of the outer peripheral surface of the arc-shaped portion 231a of the split piece 230 is larger than the diameter of the portion of the fitting hole 223a that contacts the outer peripheral surface of the arc-shaped portion 231a. Furthermore, before the mounting member 23 is inserted into the fitting hole 223a, the outer diameter of the protrusion 232 of the split piece 230 is larger than the diameter of the portion of the fitting hole 223a that contacts the protrusion 232 in the radial direction. Furthermore, the split piece 230 is inserted into the fitting hole 223a while expanding the fitting hole 223a which is smaller than the split piece 230, thereby ensuring close contact between the split piece 230 and the inner surface of the fitting hole 223a.

[0087] The other structures of the power cable connection device 1 are the same as those of the first embodiment.

[0088] In the manufacturing method of the power cable connection device 1 of this embodiment, similarly to the first embodiment, after the insulating tube 22 and the mounting member 23 are separately formed, the two split pieces 230 constituting the mounting member 23 are assembled into the fitting hole 223a of the insulating tube 22 by insertion (specifically, press-fitting). As an example, the two split pieces 230 are inserted into the fitting hole 223a at the same time while being temporarily fixed to each other by a clamp not shown. As a result, the insertion of the two split pieces 230 into the fitting hole 223a can be facilitated. However, the present invention is not limited thereto, and the two split pieces 230 may also be inserted into the fitting hole 223a one by one.

[0089] The rest of the method for manufacturing the power cable connection device 1 is the same as that of the first embodiment.

[0090] In addition, among the reference numerals used in the second embodiment and thereafter, the same reference numerals as those used in the existing embodiment represent the same components as those in the existing embodiment unless otherwise indicated.

[0091] (Functions and Effects of Second Embodiment)

[0092] In the present embodiment, the mounting member 23 is divided in the circumferential direction at at least one location. Therefore, the mounting member 23 is easily displaced or deformed following the thermal expansion and thermal contraction of the insulating tube 22 , thereby reducing stress generated in the insulating tube 22 .

[0093] Otherwise, the same operations and effects as those of the first embodiment are achieved.

[0094] [Third Embodiment]

[0095] Reference Fig.11 as well as Fig.12 A third embodiment of the present invention will be described. Fig.11 2 is a cross-sectional view passing through two divided portions 23 a in the power cable connection device 1 . Fig.12 yes Fig.11 Sectional view taken along line XII-XII.

[0096] This embodiment is an embodiment in which a path sealing portion 6 is further provided with respect to the second embodiment. The path sealing portion 6 is a component that seals the gap S between the portion of the insulating tube 22 located on the outer peripheral side of the mounting member 23 and the flange member 24, and the communication path P that connects the external space of the power cable connection device 1 and the space in the cover 3 through the dividing portion 23a of the mounting member 23.

[0097] The gap S is formed between the later-described opposing wall 243 in the axial direction X of the flange member 24 and a portion of the insulating tube 22 formed on the outer peripheral side of the mounting member 23 in the axial direction X. The opposing wall 243 is formed so as to protrude toward the front end side X1 in the flange member 24 and is annularly opposed to the outer peripheral surface of the protruding portion 232 of the mounting member 23 in the radial direction. The gap S is formed over the entire circumference.

[0098] In the present embodiment, the path sealing portion 6 is formed in a manner to block the gap S from the outer peripheral side. The path sealing portion 6 is formed throughout the entire circumference to block the gap S formed throughout the entire circumference. The path sealing portion 6 can be composed of, for example, putty, a belt component, etc. In the case where the path sealing portion 6 is composed of putty, as an example, the path sealing portion 6 can be arranged in at least a portion of the gap S, and is applied on the outer peripheral side of the gap S in a manner that straddles the opposing walls 243 and the insulating tube 22. In the case where the path sealing portion 6 is composed of a belt component, as an example, the path sealing portion 6 is wound at least once on the outer peripheral side of the gap S in a manner that straddles the opposing walls 243 and the insulating tube 22. Fig.11 , an example is shown in which the path sealing portion 6 is composed of putty and the path sealing portion 6 also enters the gap S, but when the path sealing portion 6 is composed of a belt member, the path sealing portion 6 is not arranged in the gap S, but is arranged only on the outer peripheral side of the gap S. In addition, the path sealing portion 6 may be composed of both putty and a belt member, for example. In this case, for example, the gap S may be filled with putty, and the outer peripheral side of the putty may be further wound with a belt member.

[0099] In this embodiment, since the communication path P is sealed by the path sealing portion 6, a sealing portion between the mounting member 23 and the flange member 24 is not required (see Figure 1 and Figure 2 In this embodiment, the space inside the cover 3 is composed of the path sealing portion 6 and the sealing portion (refer to Figure 1 Symbol 12), the sealing part 11b ensures water tightness.

[0100] The other structures of the power cable connection device 1 are the same as those of the second embodiment.

[0101] In the method of manufacturing the power cable connection device 1 of this embodiment, after the mounting member 23 is inserted into the insulating tube 22 and the flange member 24 is fastened to the mounting member 23 by the bolts B1 , the communication path P is sealed by the path sealing portion 6 .

[0102] The rest of the method for manufacturing the power cable connection device 1 is the same as that of the second embodiment.

[0103] (Functions and Effects of the Third Embodiment)

[0104] The power cable connection device 1 of this embodiment further includes a path sealing portion 6 that seals the communication path P. Therefore, foreign matter such as moisture can be prevented from entering the interior of the power cable connection device 1 (for example, the inner space of the cover) through the gap S.

[0105] Otherwise, the same operations and effects as those of the second embodiment are achieved.

[0106] (Fourth Embodiment)

[0107] Reference Fig.13 A fourth embodiment of the present invention will be described. Fig.13 2 is a cross-sectional view passing through two divided portions 23 a in the power cable connection device 1 .

[0108] This mode is a mode in which the structure of the path sealing portion 6 is changed relative to the third embodiment. In this mode, the power cable connection device 1 has two path sealing portions 6. The two path sealing portions 6 are respectively composed of elastic sheets that can be elastically deformed and are respectively arranged in two dividing portions 23a. Each path sealing portion 6 is arranged in a state of being compressed by two dividing pieces 230 in the thickness direction of each path sealing portion 6. In this mode, the path sealing portion 6 is arranged in the entirety of the arranged dividing portion 23a, but is not limited to this, as long as the connecting path P can be sealed. For example, the two path sealing portions 6 can also be arranged only between the protrusions 232 of the two dividing pieces 230, and not between the arc-shaped portions 231a of the two dividing pieces 230. In the case where the dividing portion 23a is formed with a hard adhesive, etc., the path sealing portion 6 can be sealed, but the significance of setting the dividing portion 23a (i.e., absorbing stress) is small, so in the case where the path sealing portion 6 is arranged in the dividing portion 23a, it is preferred that the path sealing portion 6 can be deformed (for example, elastically deformed).

[0109] Furthermore, in this embodiment, in order to prevent moisture and the like from entering the power cable connection device 1 through the boundary between the mounting member 23 and the flange member 24 , a sealing portion 11 a such as an O-ring is disposed between the mounting member 23 and the flange member 24 , unlike the third embodiment.

[0110] The other structures of the power cable connection device 1 are the same as those of the second embodiment.

[0111] In the manufacturing method of the power cable connection device 1 of this embodiment, when the two split pieces 230 are temporarily fixed before being inserted into the fitting hole 223a, the two path sealing parts 6 are respectively clamped by the two split parts 23a of the two split pieces 230. And, the two split pieces 230 are inserted into the fitting hole 223a in a state of clamping the two path sealing parts 6.

[0112] The rest of the manufacturing method of the power cable connection device 1 is the same as that of the second embodiment.

[0113] (Functions and Effects of Fourth Embodiment)

[0114] In this embodiment, the path sealing portion 6 is arranged in the dividing portion 23a. Therefore, even when the adhesion between the path sealing portion 6 and the insulating tube 22 is low, the communication path P can be sealed. Therefore, even if a material with low adhesion is used as the insulating tube 22, for example, the communication path P can be easily sealed.

[0115] Otherwise, the same operations and effects as those of the third embodiment are achieved.

[0116] (Summary of Implementation Methods)

[0117] Next, the technical ideas grasped from the above-described embodiments are described by citing the symbols in the embodiments. However, the symbols in the following description are not limited to specifically indicating the components in the claims as the components in the embodiments.

[0118] [1] A power cable connection device 1 comprises: an insulating tube 22; a tube member 21 which is arranged inside the insulating tube 22 and into which a power cable 10 is inserted; and a mounting member 23 which is arranged so as to surround the tube member 21 from the outer peripheral side and is fitted into the insulating tube 22 so that a mounting surface 234 to be mounted on another member is exposed from the insulating tube 22.

[0119] [2] The power cable connection device 1 according to [1], wherein the mounting member 23 is inserted into a fitting hole 223 a formed in the insulating tube 22 .

[0120] [3] The power cable connection device 1 according to [2], wherein the mounting member 23 is press-fitted into the fitting hole 223a.

[0121] [4] The power cable connection device 1 according to [2] or [3], wherein the insulating tube 22 has a protrusion 223d on the open side X2 of the fitting hole 223a of the mounting component 23 that protrudes toward the outer peripheral side and faces the mounting component 23 from the open side X2.

[0122] [5] The power cable connection device 1 according to [4], wherein an outer diameter of a portion of the insulating tube 22 closer to the open side X2 than the raised portion 223 d is smaller than an inner diameter of the mounting member 23 .

[0123] [6] The power cable connection device 1 according to any one of [2] to [5], wherein the mounting member 23 is divided in the circumferential direction at at least one location.

[0124] [7] The power cable connection device 1 according to [6] further comprises: a flange part 24, which is fixed to the mounting part 23 so as to overlap with the mounting surface 234 of the mounting part 23; a cover 3, which is located on the side of the flange part 24 opposite to the mounting part 23 and surrounds the insulating tube 22; and a path sealing part 6, which seals the gap S between the portion of the insulating tube 22 located on the outer peripheral side of the mounting part 23 and the flange part 24, and the connecting path P that connects the external space with the space in the cover 3 through the dividing part 23a of the mounting part 23.

[0125] [8] A method for manufacturing a power cable connection device 1, comprising: a step of forming an insulating tube 22 integral with a tube component 21 to be inserted into a power cable 10; and a step of fitting a mounting component 23 into the insulating tube 22 to a position on the outer peripheral side of the tube component 21 after the insulating tube 22 is formed.

[0126] The embodiments of the present invention are described above, but the above embodiments do not limit the invention involved in the claims. In addition, it should be noted that the combination of features described in the embodiments is not necessarily necessary for all means to solve the problems of the invention. In addition, the present invention can be implemented by appropriately deforming within the scope of its purpose.

Claims

1. A power cable connection device, characterized in that: have: Insulation tube; a pipe member which is arranged inside the insulating tube and into which the power cable is inserted; and The mounting member is arranged so as to surround the pipe member from the outer peripheral side and is fitted to the insulating tube so that a mounting surface to be mounted on another member is exposed from the insulating tube.

2. The power cable connection device according to claim 1, characterized in that: The mounting member is inserted into a fitting hole formed in the insulating tube.

3. The power cable connection device according to claim 2, characterized in that: The mounting member is press-fitted into the fitting hole.

4. The power cable connection device according to claim 2 or 3, characterized in that: The insulating tube has a protruding portion that protrudes toward the outer peripheral side on the open side of the fitting hole of the mounting member and faces the mounting member from the open side.

5. The cable connection device according to claim 4, characterized in that: The outer diameter of a portion of the insulating tube closer to the opening side than the protruding portion is smaller than the inner diameter of the mounting member.

6. The power cable connection device according to claim 2 or 3, characterized in that: The mounting member is divided in the circumferential direction at at least one location.

7. The power cable connection device according to claim 6, characterized in that: Also available: a flange member fixed to the mounting member so as to overlap with the mounting surface of the mounting member; a cover located on a side of the flange member opposite to the mounting member side and surrounding the insulating tube; as well as A path sealing portion seals a gap between a portion of the insulating tube located on the outer peripheral side of the mounting member and the flange member, and a communication path that connects an external space with a space in the cover through the partition of the mounting member.

8. A method for manufacturing a power cable connection device, characterized in that: have: a step of forming an insulating tube integral with a tube member inserted into a power cable; and After the insulating tube is formed, a step of fitting a mounting member to the insulating tube to a position on the outer peripheral side of the tube member.

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