JP7294212B2 - Cable connection device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a cable connection device suitable for use in railway vehicles.

2. Description of the Related Art There is known a device direct connection type cable termination connector applied to an electrical device, which is capable of increasing the number of branched cables (see, for example, Patent Document 1).

Japanese Patent No. 5950745

On the other hand, railway vehicles also use cables that supply electric power collected using current collectors to various parts of the vehicle. When laying cables for railway vehicles in railway vehicles, as in the case of electrical equipment, terminal connections that connect cables to equipment other than cables and intermediate connections that connect cables to each other are installed as necessary. is used in

In the following, when the intermediate connection portion and the terminal connection portion are not distinguished, they are simply referred to as a connection portion. Also, the connection part is also written as a termination or a joint.

Compared to electrical equipment installed in facilities such as buildings, railroad vehicles are different in that vibrations and shocks occur due to running of the vehicles. In the terminal connection portion disclosed in Patent Literature 1, there is a risk that the mechanical strength of the connection portion may be insufficient against vibrations and shocks caused by running of the vehicle.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cable connection device that can be easily used in railway vehicles and that can easily ensure mechanical strength.

In order to achieve the above object, the present invention provides the following means.
In the cable connection device of the present invention, the first connecting portion is formed in a convex shape and the first conductor is exposed on the end face of the convex shape, and the first connecting portion is formed in a concave shape and the second conductor is on the inner surface of the concave shape. A cable connecting device electrically conductively connected to an exposed second connecting portion, the first terminal portion having a concave shape into which the first connecting portion can be inserted, and a convex portion that can be inserted into the second connecting portion. a structure having at least a plurality of second terminal portions having a shape; and a conductive inner conductor disposed in the structure and formed in an elongated shape, the inner conductor comprising a side surface of the inner conductor. is exposed on the inner surface of the first terminal portion, and the end surface of the internal conductor is exposed on the end surface of the second terminal portion, and the side surface of the first conductor and the internal conductor of the first connection portion and a first fixing portion for conductively fixing.

According to the cable connecting device of the present invention, the side surface of the inner conductor is fixed to the first conductor of the first terminal portion, and the inner conductor extends from the position of the end surface of the first connection portion in the first terminal portion to the second conductor. extending toward each of the terminal portions. Therefore, it becomes easy to bring the second terminal portion closer to the first terminal portion, and there is an effect that it becomes easy to secure a mechanical strength that is easy to use in a railway vehicle.

1 is an exploded view illustrating the configuration of a cable connecting device according to an embodiment of the present invention; FIG. FIG. 2 is a schematic diagram illustrating a state in which the cable connection device of FIG. 1 is connected to equipment, a first cable, and a second cable; It is a schematic diagram explaining the state where the 1st cable and the 2nd cable were connected by a different attitude|position.

A cable connecting device according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. In this embodiment, the cable connection device 1 is applied to an example used in a railway vehicle. Specifically, an example of application to connection of a cable (for example, an ultra-high voltage cable) that supplies electric power collected by a current collector such as a pantograph to various parts of a vehicle will be described. This cable is laid on the roof of the railcar, under the floor, on the side between the railcars, and the like.

A railway vehicle to which the cable connection device 1 of the present embodiment is applied is a railway vehicle using an AC power supply. More specifically, it is a railway vehicle using a single-phase AC power supply. Note that it may be a railway vehicle using a three-phase AC power supply.

The frequency of the AC power supply may be a commercial frequency of 50 Hz or 60 Hz, or may be a frequency other than the commercial frequency. Although 20 kV, 25 kV, etc. can be exemplified as the voltage of the AC power supply, voltages other than these voltages may be used.

The cable connection device 1 is detachably connected to a device 50 as shown in FIG. A first cable 60A and a second cable 60B are detachably connected to the cable connection device 1 . The device 50 can be exemplified by a device mounted on a railway vehicle. The first cable 60A and the second cable 60B have a rated voltage corresponding to the voltage (for example, 20 kV or 25 kV) of the AC power supplied to the railway vehicle.

A known configuration can be used for the configuration including the conductors, insulators, shields, sheaths, and the like in the first cable 60A and the second cable 60B. In addition, known materials can be used as materials for forming conductors, insulators, shields, and sheaths.

The device 50 is provided with a wall portion 51 , a base portion 52 , and a connection terminal (first connection portion) 53 used for connection with the cable connection device 1 .
The wall portion 51 is a member that forms the outer shape of the device 50 and supports the base portion 52, the connection terminals 53, and the like. The base portion 52 is a member to which the support portion 40 described later is detachably attached.

The connection terminal 53 is a member used for connection with the cable connection device 1 . The connection terminal 53 is a terminal formed in a convex shape to be inserted into the first terminal portion 11 to be described later, and has a shape corresponding to a known standard. Examples of known standards include EN50181 of the European Norm.

In the present embodiment, a terminal portion 54 formed in a shape obtained by adding a cylindrical shape and a truncated cone shape provided protruding from the wall portion 51, and a terminal portion 54 disposed inside the terminal portion 54 and exposed at the end portion of the terminal portion 54 An example in which a connection terminal 53 is provided with a conductor (first conductor) 55 having a surface and a bolt hole 56 provided on the exposed surface of the conductor 55 and used for fixing to a first fixing portion 25 described later. Apply and explain.

The first cable 60A and the second cable 60B are provided with terminal connection portions (second connection portions) 61A and 61B used for connection with the cable connection device 1, respectively. The terminal connection portions 61A and 61B are terminals formed in a concave shape into which second terminal portions 15A and 15B, which will be described later, are inserted, and have shapes corresponding to known standards. Examples of known standards include EN50181 of the European Norm.

In the present embodiment, a connection recess 62, which is a cylindrical member arranged perpendicular to the first cable 60A or the second cable 60B and has a conical inner peripheral surface corresponding to the second terminal portions 15A and 15B, is provided. A terminal portion 63 provided, a connection terminal (second conductor) 64 that can be electrically conductive with the conductor of the first cable 60A or the second cable 60B and is exposed on the end surface of the connection recess 62, and fixing to the cable connection device 1 An example in which the second bolt 65 corresponding to the second fixing portion 21 used is provided in the terminal connection portions 61A and 61B will be described.

The cable connecting device 1 is provided with a structure 10, an internal conductor 20, an insulating plug 30, and a support portion 40, as shown in FIG.
The structure 10 is a member that forms the outer shape of the cable connecting device 1 . An internal conductor 20 is arranged inside the structure 10 . The structure 10 is also a member that insulates the inner conductor 20 from the outside. As a material forming the structure 10, an insulating epoxy resin can be exemplified.

The structure 10 is provided with a first terminal portion 11 , second terminal portions 15</b>A and 15</b>B, an opening 17 , and a cap portion 19 .
The first terminal portion 11 is a concave portion formed in the structure 10 and formed on the surface of the structure 10 facing the device 50 . The first terminal portion 11 is a portion to which the connection terminal 53 of the device 50 is attached and detached.

The first terminal portion 11 is formed in a concave shape having a truncated cone-shaped inner peripheral surface corresponding to the outer shape of the connection terminal 53 . An insulating portion 12 is formed in layers on the inner peripheral surface of the first terminal portion 11 . The internal conductor 20 is exposed at the bottom of the first terminal portion 11 .

A step is formed around the first terminal portion 11 in the structure 10 , and the step is provided with a shielding portion 13 surrounding the first terminal portion 11 . The shielding part 13 is a member that comes into contact with the base part 52 when the cable connection device 1 is arranged on the device 50 . The shielding portion 13 prevents foreign matter from entering the first terminal portion 11 from the outside of the cable connection device 1 by coming into contact with the base portion 52 .

The second terminal portions 15A and 15B are portions of the structure 10 formed to protrude, and are portions to which the terminal connection portions 61A and 61B are attached and detached. The second terminal portions 15A, 15B have a truncated cone shape corresponding to the inner surface shape of the connection recess 62 of the terminal connection portions 61A, 61B. The internal conductors 20 are exposed on the end surfaces of the second terminal portions 15A and 15B.

The opening 17 is formed on the side of the structure 10 opposite to the first terminal portion 11 straddling the internal conductor 20, and is a recess in which the insulating plug 30 is detachably arranged. The internal conductor 20 is exposed on the bottom surface of the opening 17 . In this embodiment, an example in which the opening 17 has an inner surface formed like a truncated cone whose diameter decreases toward the inner conductor 20 will be described.

The cap portion 19 is a member that covers the opening of the opening portion 17 . The cap portion 19 is a plate-like member formed in a shape corresponding to the opening of the opening portion 17, and has a bent portion at its edge. The cap portion 19 may be provided as in this embodiment, or may not be provided.

The internal conductor 20 is a member arranged inside the structure 10 . The internal conductor 20 is made of a conductive material such as copper. The internal conductor 20 is arranged to connect the second terminal portions 15A and 15B, and has its side surface exposed to the inner surface of the first terminal portion 11 .

The exposed surfaces of the second terminal portions 15A and 15B of the internal conductor 20 are the surfaces that are in conductive contact with the terminal connection portions 61A and 61B. The exposed surfaces of the second terminal portions 15A and 15B of the internal conductor 20 are respectively provided with second fixing portions 21 used for fixing to the terminal connection portions 61A and 61B. The second fixing portion 21 is a bolt hole corresponding to the second bolt 65 of the terminal connection portions 61A and 61B.

The side surface of the internal conductor 20 exposed on the inner surface of the first terminal portion 11 is the surface that electrically contacts the conductor 55 of the connection terminal 53 . The internal conductor 20 is provided with a through hole 22 opening to the opening 17 and the first terminal portion 11 . The through hole 22 is a hole through which a first fixing portion 25, which will be described later, is inserted. The opening of the through hole 22 on the side of the opening 17 may be provided with a counterbore having a stepped shape with a wider diameter.

The first fixing portion 25 is a member that fixes the internal conductor 20 and the conductor 55 in a conductive contact state. In the present embodiment, the first fixing portion 25 is a rod-shaped member having a male thread formed on its circumferential surface, and is a screw member that is inserted through the through hole 22 and screwed into the bolt hole 56 of the conductor 55; A description will be given by applying to an example that is a combination of nut members that are screwed together with screw members.

The insulating plug 30 is a member arranged in the opening 17 and is an insulating member that closes the opening 17 . The insulating plug 30 is also a member that covers the periphery of the first fixing portion 25 . As a material for forming the insulating plug 30, an insulating epoxy resin can be exemplified.

The support portion 40 is a member that supports the structure 10 attached to the base portion 52 . The support portion 40 has a configuration that is detachably fixed to the base portion 52 . The support portion 40 is provided with a first flange portion 41 that contacts the structure 10 and presses the structure 10, and a second flange portion 42 that contacts the base portion 52 and has a through hole used for fixing. there is The support portion 40 may be a member formed integrally, or may be configured from a plurality of members.

Next, the connection between the cable connection device 1 having the above configuration and the device 50 and the connection of the first cable 60A and the second cable 60B to the cable connection device 1 will be described with reference to FIGS. 2 and 3. FIG.

The cable connection device 1 is connected to the connection terminal 53 of the equipment 50 . Specifically, the connection terminal 53 is inserted into the first terminal portion 11 . At this time, the conductor 55 of the connection terminal 53 contacts the internal conductor 20 exposed at the first terminal portion 11 so as to be conductive.

The first fixing portion 25 is inserted through the through hole 22 of the internal conductor 20 and its tip is screwed into the bolt hole 56 . At this time, the nut portion of the first fixing portion 25 is arranged on the opening portion 17 side of the internal conductor 20 . The internal conductor 20 and the conductor 55 are fixed by the first fixing portion 25 .

The insulating plug 30 is fitted into the opening 17 and the structure 10 is supported by the support 40 . Specifically, the support portion 40 is arranged with the structure 10 interposed between the support portion 40 and the base portion 52 , the first flange portion 41 is pressed against the structure 10 , and the second flange portion 42 is pressed against the base portion 52 . . A bolt is inserted through the through-hole of the second collar portion 42 and is tightened into the bolt hole of the base portion 52 . After that, the opening of the opening portion 17 is closed by the cap portion 19 .

Also, a first cable 60A and a second cable 60B are attached to the cable connection device 1 . Specifically, the second terminal portions 15A, 15B are inserted into the connection recesses 62 of the terminal connection portions 61A, 61B. The second bolts 65 of the terminal connection portions 61A, 61B are screwed into the second fixing portion 21 of the internal conductor 20. As shown in FIG. The connection terminals 64 of the first cable 60A and the second cable 60B are in conductive contact with the inner conductor 20 , and the first cable 60A and the second cable 60B are fixed to the cable connection device 1 .

According to the cable connection device 1 configured as described above, the second terminal portions 15A and 15B can be easily brought closer to the first terminal portion 11 . Therefore, compared to the case where the second terminal portions 15A and 15B are separated from the first terminal portion 11, it becomes easier to ensure the mechanical strength against vibration and shock in the cable connecting device 1. FIG.

The inner conductor 20 is fixed to the conductor 55 of the first terminal portion 11 at its side surface. The internal conductor 20 extends (in other words, branches) from the position of the end surface of the connection terminal 53 in the first terminal portion 11 toward the second terminal portions 15A and 15B.

Branching from the end surface makes it easier to dispose the second terminal portions 15A and 15B closer to the first terminal portion 11 than when branching from a position distant from the end surface of the connection terminal 53 . That is, it becomes easier to ensure mechanical strength against vibration and impact in the cable connection device 1 .

The cable connection device 1 has two second terminal portions 15A and 15B. Therefore, by connecting the cable connection device 1 to the device 50, it is possible to provide a terminal for branching to another device connected in parallel. In addition, by using the cable connection device 1 when modifying the extra high voltage system of a railway vehicle, it is possible to branch the power supply to the system to be added.

By providing the through hole 22 in the region of the internal conductor 20 exposed to the opening 17, the conductor 55 of the connection terminal 53 and the internal conductor 20 can be easily fixed so as to be electrically conductive. Specifically, the first fixing portion 25 is inserted through the through hole 22 from the opening portion 17 . The inserted end of the first fixing portion 25 is engaged with the conductor 55 of the connection terminal 53 arranged on the first terminal portion 11 . The first fixing portion 25 brings the conductor 55 and the internal conductor 20 into conductive contact, and fixes the conductor 55 and the internal conductor 20 in the contact state.

By providing the insulating plug 30 that closes the opening 17, it becomes easier to maintain the insulation of the internal conductor 20 compared to the case where the insulating plug 30 is not provided. Furthermore, it becomes easier to prevent foreign matter from entering the opening 17 from the outside of the structure 10 .

By providing the support portion 40 , the structure 10 can be supported by the support portion 40 attached to the base portion 52 . Therefore, compared to the case where the support portion 40 is not provided, it becomes easier to secure the mechanical strength against vibration and shock in the cable connection device 1 .

By providing the second fixing portion 21, it becomes easier to fix the terminal connection portions 61A and 61B to the second terminal portions 15A and 15B as compared with the case of fixing by other methods. In addition, it becomes easy to set the relative posture of the terminal connection portions 61A and 61B fixed to the structure 10 to a desired relative posture rotated around the second fixing portion 21 as shown in FIG. FIG. 3 shows an example in which the first cable 60A extends forward from the paper and the second cable 60B extends backward from the paper.

The technical scope of the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the present invention.
For example, in the present embodiment, the cable connection device 1 is described as being provided with two second terminal portions 15A and 15B, but three or more second terminal portions may be provided. , the number of the second terminal portions is not limited.

REFERENCE SIGNS LIST 1 cable connecting device 10 structure 17 opening 11 first terminal 15A, 15B second terminal 20 inner conductor 21 second fixing part 22 through hole 25 First fixing portion 30 Insulating plug 40 Supporting portion 53 Connection terminal (first connection portion) 61A, 61B Termination connection portion (second connection portion)

Claims (5)

a first connecting portion formed in a convex shape and having a first conductor exposed on the end surface of the convex shape, and a second connecting portion formed in a concave shape and having a second conductor exposed on the inner surface of the concave shape; A cable connection device electrically conductively connected,
a structure having at least a first terminal portion having a concave shape into which the first connection portion can be inserted; and a plurality of second terminal portions having a convex shape into which the second connection portion can be inserted;
A conductive internal conductor disposed in the structure and formed in an elongated shape, wherein the side surface of the internal conductor is exposed to the inner surface of the first terminal portion, and the end surface of the internal conductor is an internal conductor exposed on the end surface of the second terminal portion;
a first fixing portion that electrically fixes the first conductor of the first connection portion and the side surface of the internal conductor;
A cable connection device provided with An opening exposing a side surface of the internal conductor is provided on the opposite side of the first terminal portion straddling the internal conductor in the structure,
The internal conductor is provided with a through hole that opens to the opening and the first terminal portion and through which the first fixing portion can be inserted,
2. The cable connection device according to claim 1, wherein said first fixing portion is inserted through said through hole and fixes said first conductor and said inner conductor of said first connection portion so as to be electrically conductive. 3. The cable connecting device according to claim 2, further comprising an insulating plug that closes the opening and can insulate the inner conductor from the outside of the structure. 4. A support part that is arranged around the structure and is detachable from the base having the first connecting part, and that supports the structure when attached to the base is further provided. The cable connection device according to any one of Claims 1 to 3. 5. Any one of claims 1 to 4, wherein a second fixing portion used for fixing the second connection portion is further provided on a surface of the inner conductor exposed on the end surface of the second terminal portion. A cable connection device as described in .

Images