JPWO2016203589A1 - Connection structure and connection part protection member - Google Patents

Abstract

A plurality of plate-like first electrodes (2) provided on the terminal block (2) in order to provide a connection structure and a connection part protection member that allow the connection part to have a touch protection structure and can be easily connected. 3) and a plurality of plate-like second electrodes (5) respectively provided at end portions of the plurality of cables (4), each having a connection structure, wherein the plurality of first electrodes (3) A connection part protection member having a housing (9) made of an insulator, which is provided so as to cover each of the connection parts (6) of the plurality of second electrodes (5) and is bolted to the terminal block (2). (10), and the housing (9) is bolted to the terminal block (2) so that the connecting portions (6) are collectively pressed by the housing (9).

Description

  The present invention relates to a connection structure and a connection portion protection member.

  Conventionally, when connecting a cable such as a battery or an inverter in an electric vehicle or a hybrid vehicle, for example, a plate-shaped first electrode (bus bar terminal) provided on a terminal block of the device and an end of the cable The plate-like 2nd electrode (bus bar terminal) provided in is electrically connected by screwing fixation (for example, refer to patent documents 1).

JP 2014-969310 A

  By the way, there is a possibility that a large current flows in the connection portion between the battery or the inverter and the cable as described above, and there is a possibility that an electric shock may occur if the worker directly touches the terminal or the like. Depending on the system configuration of the vehicle, the terminal block of the battery or the inverter may be exposed, and in order to ensure the safety of the worker, the structure in which the worker cannot directly touch the connection part, that is, It is desired that the connection portion has a touch protection structure.

  In addition, in the connection part between the battery or the inverter and the cable as described above, a plurality of cables are often connected together, and screwing work must be performed at each connection part. There is also a problem.

  In view of the above, an object of the present invention is to provide a connection structure and a connection part protection member that can make the connection part have a touch protection structure and can be easily connected.

  In order to solve the above-described problems, the present invention provides a plurality of plate-like first electrodes provided on a terminal block, and a plurality of plate-like second electrodes provided on end portions of a plurality of cables, respectively. Are connected to each other, and are provided so as to collectively cover each of the connection portions of the plurality of first electrodes and the plurality of second electrodes, and from an insulator that is bolted to the terminal block. A connection structure having a connection portion protection member having a housing, and configured such that the connection portions are pressed together by the housing by bolting the housing to the terminal block. To do.

  In order to solve the above-mentioned problems, the present invention provides a plurality of plate-like first electrodes provided on the terminal block and a plurality of plate-like second electrodes provided respectively at the ends of the plurality of cables. A connection portion protection member provided at a connection portion for connecting the electrodes, wherein the terminal is provided so as to cover each of the connection portions of the plurality of first electrodes and the plurality of second electrodes, A connection comprising a housing made of an insulator that is bolted to a base, and configured to be pressed together by the housing by bolting the housing to the terminal block. A member protecting member is provided.

  ADVANTAGE OF THE INVENTION According to this invention, a connection part can be made into a touch protection structure, and the connection structure and connection part protection member which are easy to connect can be provided.

It is a disassembled perspective view which shows the connection structure which concerns on one embodiment of this invention. (A) is the perspective view of the connection structure of FIG. 1, (b) is the top view. (A) is the sectional view on the 3A-3A line of Drawing 2 (b), (b) is the sectional view on the 3B-3B line of Drawing 2 (b). It is a perspective view of a connection part protection member. It is a top view of the connection structure concerning one modification of the present invention. (A), (b) is a figure explaining the connection procedure in the connection structure of FIG.

[Embodiment]
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

(Overall structure of connection structure)
FIG. 1 is an exploded perspective view showing a connection structure according to the present embodiment, FIG. 2 (a) is a perspective view thereof, and FIG. 2 (b) is a plan view thereof. 3A is a cross-sectional view taken along the line 3A-3A in FIG. 2B, and FIG. 3B is a cross-sectional view taken along the line 3B-3B in FIG.

  As shown in FIGS. 1 to 3, the connection structure 1 includes a plurality of plate-like first electrodes (bus bar terminals) 3 provided on the terminal block 2 and a plate-like shape provided on each end of the plurality of cables 4. The plurality of second electrodes (bus bar terminals) 5 are connected to each other.

  Here, a case where two electrodes 3, 5 and two cables 4 are provided will be described on the assumption that a DC power signal is transmitted, but the number of both electrodes 3, 5 and cables 4 is limited to this. Is not to be done.

  The terminal block 2 is provided integrally with a device such as a battery or an inverter, for example, and is configured by mounting the distal end portion of the first electrode 3 on a pedestal portion 2a. Although omitted in FIGS. 1 and 2, as shown in FIGS. 3A and 3B, the base end portion of the first electrode 3 is covered with a housing portion (resin mold) 2b made of an insulator. The tip of the first electrode 3 is configured to extend from the housing 2b. The pedestal portion 2a may be provided integrally with the housing portion 2b or may be provided separately.

  A through hole 3a is formed in the first electrode 3, and a screw hole 2c is formed in the pedestal portion 2a at a position facing the through hole 3a. These through holes 3a and screw holes 2c are originally used for screwing and fixing the connecting portions 6 of the electrodes 3 and 5, but in the present embodiment, these through holes 3a and screw holes 2c By passing a pin portion 14b of the collar 14 described later, the electrodes 3 and 5 are positioned and the electrodes 3 and 5 are prevented from coming off.

  Further, the terminal block 2 is formed with a bolt fixing hole 7 for fixing a connecting portion protection member 10 to be described later. The bolt fixing hole 7 is formed at a position where the center thereof is aligned with the centers of the two through holes 3a (screw holes 2c) in plan view.

  In this embodiment, two substantially rectangular parallelepiped pedestals 2a corresponding to both first electrodes 3 are connected by a cylindrical body 7a having bolt fixing holes 7, but the structure of the terminal block 2 is as follows. For example, one substantially rectangular parallelepiped pedestal 2a corresponding to both first electrodes 3 is formed, and bolt fixing hole 7 is formed in pedestal 2a in the middle of both screw holes 2c. You may comprise as follows.

  The cable 4 is configured by covering the outer periphery of a central conductor 4a made of a single wire or a stranded wire conductor with a sheath 4b made of an insulator. At the distal end portion of the cable 4, the central conductor 4a extends from the sheath 4b, and the second electrode 5 is electrically connected to the extended central conductor 4a.

  Here, both the cables 4 are provided with a sealing mechanism 8 having an O-ring 8a that seals between a cable insertion hole and a cable 4 provided in a housing (not shown) of the device. When there is no need to do this, or when the terminal block 2 is not provided in the housing and is exposed from the device, the seal mechanism 8 can be omitted.

  The second electrode 5 includes a caulking portion 5a that is caulked and fixed to a central conductor 4a that extends from the sheath 4b at the distal end portion of the cable 4, and is formed integrally with the caulking portion 5a and forward (from the cable 4). And a plate-like terminal portion 5b extending in the direction opposite to the extending side.

  A through hole 5c is formed in the terminal portion 5b. This through-hole 5c is originally used for screwing and fixing the connecting portion 6 of both electrodes 3 and 5 in the same manner as the above-described through-hole 3a of the first electrode 3, The pins 14b of the collar 14 to be described later are passed through the through holes 3a, 5c and the screw holes 2c, so that the electrodes 3 and 5 are positioned and the electrodes 3 and 5 are prevented from coming off.

(Explanation of connecting part protection member)
As shown in FIGS. 1 to 4, in the connection structure 1 according to the present embodiment, each of the connection portions 6 of the plurality of first electrodes 3 and the plurality of second electrodes 5 is provided so as to collectively cover the terminals. The connection part protection member 10 having a housing 9 made of an insulator that is bolted to the base 2 is provided. By fixing the housing 9 to the terminal base 2 with bolts, the connection parts 6 are pressed together by the housing 9. It is comprised so that.

  That is, the connection part protection member 10 protects the connection part 6 and suppresses the operator from touching the connection part 6, and presses each connection part 6 to stabilize the electrical connection between the electrodes 3 and 5. It is a member that also serves as a role.

  The housing 9 is provided so as to cover each connection portion 6, and has a substantially rectangular parallelepiped main body portion 9 a opened at the lower side (connection portion 6 side), and a base end portion of the second electrode 5 extending from the connection portion 6 toward the cable 4. Two extending portions 9b provided so as to cover (caulking portion 5a) are integrally provided. The extending portion 9b is formed so as to cover the base end portion of the second electrode 5 (up to the distal end portion of the sheath 4b), and is formed in a curved shape along the shape of the caulking portion 5a. Here, the two extending portions 9b are formed, but the two extending portions 9b may be connected and integrated.

  Bolt holes 9c are formed in the main body 9a for passing bolts 13 for fixing bolts. The main body portion 9 a is configured such that a lower end portion thereof is in contact with the pedestal portion 2 a of the terminal block 2 and covers the side and the upper side of the connection portion 6. The lower part of the connection part 6 is covered with the base part 2 a of the terminal block 2.

  In the present embodiment, the extending portion 9b is configured to cover only the upper part and the side part of the second electrode 5. This is because a case of the device, a part of the terminal block 2 and the like are usually provided below the second electrode 5, and there is no possibility that the operator touches the lower part of the second electrode 5. However, when the operator may touch the lower portion of the second electrode 5, for example, when the terminal block 2 is provided exposed from the housing of the device, the side wall of the extending portion 9 b is set to the second side. The touch protection structure may be realized by extending to the lower side of the electrode 5 or covering the lower side of the second electrode 5 with another member.

  Moreover, since the 1st electrode 3 is also extended from the connection part 6, it is desirable to comprise the housing 9 so that the extension part of this 1st electrode 3 may be covered. Specifically, the housing 9 is formed so as to be in contact with the housing portion 2b that covers the base end portion of the first electrode 3, or a gap between the housing 9 and the housing portion 2b is inserted into the operator's finger. It is good to form so that the front-end | tip part of the housing 9 may adjoin to the housing part 2b so that it may become a clearance gap which is not. In the present embodiment, the housing 9 is formed in a substantially rectangular parallelepiped shape. However, the shape of the housing 9 is not limited thereto, and the shape of the housing 9 can be appropriately changed according to the shape of the housing portion 2b of the terminal block 2.

  As the housing 9, for example, a material made of PBT (polybutylene terephthalate) or nylon can be used. If the current flowing through the connecting portion 6 is large and heat resistance is required, the housing 9 can be made of, for example, high-tensile nylon (PA6T) or PPS (polyphenylene sulfide).

  Moreover, in this Embodiment, the connection part protection member 10 has the coil spring 11 as a some elastic member corresponding to each connection part 6, and is comprised so that each connection part 6 may be pressed with the coil spring 11. FIG. ing. Here, two coil springs 11 are provided so as to correspond to the two connection portions 6. In the present embodiment, a spring washer in which a washer 12 is integrally provided at the end of the coil spring 11 on the connecting portion 6 side is used.

  By pressing each connecting portion 6 with a coil spring 11 that is an elastic member, even if the electrodes 3 and 5 are deformed or curved due to manufacturing tolerances or the like, both electrodes are caused by the reaction force of the coil spring 11. 3 and 5 can be brought into close contact with each other, so that a gap is generated between the electrodes 3 and 5, and it is possible to suppress the occurrence of problems such as discharge due to the influence of the gap.

  The connection protection member 10 includes a collar 14 made of a metal that is disposed between the housing 9 and the coil spring 11 that is an elastic member and suppresses deformation of the housing 9 by the coil spring 11. In the present embodiment, two collars 14 are provided so as to correspond to the two connecting portions 6.

  The collar 14 is provided so as to protrude downward (from the side opposite to the housing 9) from the plate-like spring support portion 14a disposed between the coil spring 11 and the housing 9 (main body portion 9a). And a cylindrical pin portion 14b inserted through the through holes 3a and 5c of the electrodes 3 and 5 and the screw hole 2c of the terminal block 2. The support portion 14a and the pin portion 14b are integrally formed, and both are made of metal.

  The spring support portion 14a suppresses deformation of the housing 9 by dispersing and transmitting the reaction force of the coil spring 11 when the housing 9 is bolted to the terminal block 2 to the housing 9. Is formed in a size that can be sufficiently suppressed. The upper end portion of the coil spring 11 is locked or welded to the spring support portion 14a so that the coil spring 11 is not detached from the spring support portion 14a.

  The pin portion 14b extends downward through the hollow portion of the coil spring 11 and the washer 12, and when the housing 9 is bolted to the terminal block 2, the through holes 3a, 5c of the electrodes 3, 5 It is inserted into the screw hole 2 c of the terminal block 2. Thereby, both the electrodes 3 and 5 are positioned, and the electrodes 3 and 5 are prevented from coming off from the connecting portion 6.

  In the connection portion protection member 10, the collar 14 is provided integrally with the housing 9 by insert molding, adhesion, or locking, and the housing 9, the collar 14, the coil spring 11, and the washer 12 are integrally configured. . Thereby, compared with the case where the housing 9 and the color | collar 14 are made into a different body, it becomes possible to make a connection operation | work easier.

  By the way, from the viewpoint of facilitating the connection work, it can be said that it is desirable that the number of bolts 13 for fixing the connection portion protection member 10 is small. In the present embodiment, the connection protection member 10 is configured to be fixed to the terminal block 2 with one bolt 13. In the connection structure 1 according to the present embodiment, the connection portion protection member 10 is fixed by one bolt 13 to press and fix the electrodes 3 and 5 together at the two connection portions 6. Is possible, and the connection work is easy.

  In order to reduce the influence of the load caused by the reaction force of the coil spring 11, it is desirable that the position at the time of fixing the connecting portion protection member 10 with bolts, that is, the fixing position of the bolt 13, be as close as possible to the connecting portion 6. In order to achieve a balance at the time of fastening, it is desirable that the distance from the two connecting portions 6 be equal.

  In the present embodiment, the fixing position of the bolt 13 is the center position of the line segment connecting the center positions of the through holes 3a and 5c (screw holes 2c) in the two connection portions 6 in plan view, and the through holes 3a and 5c. The center of the (screw hole 2c) and the fixing position of the bolt 13 (the center of the bolt fixing hole 7 and the bolt hole 9c) are arranged in a straight line in plan view.

  In addition, although the case where the number of the connection parts 6 is two was demonstrated here, when the number of the connection parts 6 is three or more, the fixing position of the volt | bolt 13 is made into the through-holes 3a and 5c (screw screw in each connection part 6 It is desirable to form the center of gravity of the figure formed by connecting the center positions of the holes 2c).

  For example, when there are three connection portions 6, as shown in FIG. 5, a triangle formed by connecting the center positions of the through holes 3 a and 5 c (screw holes 2 c) in each connection portion 6 in plan view. The fixed position of the bolt 13 may be set at the center of gravity position. As a result, the housing 9 can be fastened with a single bolt 13 in a well-balanced manner, and the connection work becomes easier.

(Description of connection procedure in connection structure 1)
As shown in FIG. 6A, first, the terminal portion 5 b of the second electrode 5 provided at the tip of the cable 4 is placed above the first electrode 3 placed on the pedestal portion 2 a of the terminal block 2. To overlay.

  Thereafter, as shown in FIG. 6B, the connection portion protection member 10 is bolted to the terminal block 2. At this time, the pin portion 14b of the collar 14 is inserted into the through holes 3a and 5c and the screw holes 2c of the electrodes 3 and 5, and the electrodes 3 and 5 are fixed. , 5 are pressed and brought into close contact with each other, and both electrodes 3 and 5 are electrically connected. Moreover, the whole live part including the connection part 6 will be covered with the housing 9 which consists of insulators, and an operator cannot touch a live part.

(Operation and effect of the embodiment)
As described above, in the connection structure 1 according to the present embodiment, each of the connection portions 6 of the plurality of first electrodes 3 and the plurality of second electrodes 5 is provided so as to collectively cover the terminal block 2. It has the connection part protection member 10 which has the housing 9 consisting of the insulator fixed with a volt | bolt, and the connection part 6 is pressed by the housing 9 collectively by fixing the housing 9 to the terminal block 2 with a volt | bolt. It is configured.

  By covering the connection part 6 with a housing 9 made of an insulator, it is possible to make the structure in which an operator cannot directly touch the connection part 6, that is, the connection part 6 can have a touch protection structure. As a result, it is possible to perform the connection work safely, and it is possible to suppress the occurrence of problems such as electric shock.

  Further, by adopting a configuration in which the connection portions 6 are pressed together by the housing 9, it is not necessary to perform a screwing operation for each connection portion 6 and the connection operation is facilitated.

(Summary of embodiment)
Next, the technical idea grasped from the embodiment described above will be described with reference to the reference numerals in the embodiment. However, the reference numerals and the like in the following description are not intended to limit the constituent elements in the claims to the members and the like specifically shown in the embodiments.

[1] A plurality of plate-like first electrodes (3) provided on the terminal block (2) and a plurality of plate-like second electrodes (5) provided respectively at the ends of the plurality of cables (4) And a connection structure (1) for connecting the plurality of first electrodes (3) and the connection portions (6) of the plurality of second electrodes (5). And a connecting portion protection member (10) having a housing (9) made of an insulator bolted to the terminal block (2), and the housing (9) is bolted to the terminal block (2). Thus, the connection structure (1) is configured such that the connection portions (6) are collectively pressed by the housing (9).

[2] The connection part protection member (10) has a plurality of elastic members (11) corresponding to the connection parts, and presses the connection parts (6) by the elastic members (11). The connection structure (1) according to [1], which is configured.

[3] The connection portion protection member (10) is made of a metal that is disposed between the housing (9) and the elastic member (11) and suppresses deformation of the housing (9) by the elastic member (11). The connection structure according to [2], comprising a collar (14).

[4] The first electrode (3) and the second electrode (3) have through holes (3a, 5c), respectively, and the collar (14) is a through hole of both electrodes (3, 5). The connection structure (1) according to [3], including a pin portion (14b) inserted through (3a, 5c).

[5] The connection portion protection member (10) is configured to be fixed to the terminal block (2) with one bolt (13), and the fixing position of the bolt (13) is a plan view. The connection structure (1) according to [4], wherein the connection structure (1) is formed at the position of the center of gravity of the figure formed by connecting the center positions of the through holes (3a, 5c) in each connection portion (6).

[6] A plurality of plate-like first electrodes (3) provided on the terminal block (2) and a plurality of plate-like second electrodes (5) provided respectively at the ends of the plurality of cables (4). And a connection part protection member (10) provided in the connection part (6) for connecting the plurality of first electrodes (3) and the connection parts (6) of the plurality of second electrodes (5). Each having a housing (9) made of an insulator that is bolted to the terminal block (2), and the housing (9) is bolted to the terminal block (2). Thus, the connection portion protection member (10) is configured such that the connection portions (6) are collectively pressed by the housing (9).

  While the embodiments of the present invention have been described above, the embodiments described above do not limit the invention according to the claims. In addition, it should be noted that not all the combinations of features described in the embodiments are essential to the means for solving the problems of the invention.

  The present invention can be appropriately modified and implemented without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Connection structure 2 ... Terminal block 3 ... 1st electrode 3a ... Through-hole 4 ... Cable 5 ... 2nd electrode 5c ... Through-hole 6 ... Connection part 7 ... Bolt fixing hole 9 ... Housing 10 ... Connection part protection member 11 ... Coil spring (elastic member)
12 ... Washer 13 ... Bolt 14 ... Collar 14a ... Spring support part 14b ... Pin part

Claims (6)

A connection structure for connecting a plurality of plate-like first electrodes provided on a terminal block and a plurality of plate-like second electrodes respectively provided at ends of a plurality of cables,
A connection part protection member having a housing made of an insulator, which is provided so as to collectively cover each of the connection parts of the plurality of first electrodes and the plurality of second electrodes, and is bolted to the terminal block; ,
The housing is configured to be pressed together by the housing by bolting the housing to the terminal block.
Connection structure. The connection part protection member has a plurality of elastic members corresponding to the connection parts, and is configured to press the connection parts by the elastic members.
The connection structure according to claim 1. The connection portion protection member includes a collar made of a metal that is disposed between the housing and the elastic member and suppresses deformation of the housing by the elastic member.
The connection structure according to claim 2. Each of the first electrode and the second electrode has a through hole,
The collar has a pin portion that is inserted through the through holes of the electrodes.
The connection structure according to claim 3. The connection protection member is configured to be fixed to the terminal block with a single bolt,
The fixed position of the bolt is formed at the position of the center of gravity of the figure formed by connecting the center positions of the through holes in the connection portions in plan view.
The connection structure according to claim 4. A connecting portion protection member provided at a connecting portion for connecting a plurality of plate-like first electrodes provided on the terminal block and a plurality of plate-like second electrodes provided at end portions of the plurality of cables, respectively. There,
A housing made of an insulator, which is provided so as to collectively cover each of the connection portions of the plurality of first electrodes and the plurality of second electrodes, and is bolted to the terminal block;
The housing is configured to be pressed together by the housing by bolting the housing to the terminal block.
Connection part protection member.

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