JP2007330054A - Electrical connection box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform wiring harness connecting works in different assembly processes and to improve workability by vertically varying connection faces of wire harnesses on a power supply-side and a load-side. <P>SOLUTION: A case main body is provided with a bus bar storage storing one bus bar where a first terminal hole which is bolted and connected with a power supply-side terminal, and a second terminal hole which is bolted and connected with a load-side terminal, are formed. The first terminal hole or the second terminal hole of the bus bar is exposed to an upper face of the case main body, and the other is exposed to the lower face of the case main body. The bus bar is bolted and connected to the terminal of the power supply-side wire harness through the first terminal hole, and is bolted and connected to the terminal of the load-side wire harness through the second terminal hole. The power supply-side wire harness and the load-side wire harness are connected to the bus bar from upper and lower sides. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electrical connection box, which improves the connection position between a bus bar housed as an internal circuit and terminals of a wire harness terminal on a power supply side and a load side, and enables assembly on different lines.

  The electrical connection box mounted on the automobile contains a bus bar as an internal circuit, and the wire harness terminal connected to the automobile is connected to the bus bar, and the wiring harness is connected to the electrical connection box by the wire harness manufacturer. Is complete.

  In hybrid vehicles and the like that have been provided in recent years, assembly of load-side wire harnesses is performed by harness manufacturers of component manufacturers, and assembly of power supply wire harnesses is performed by car manufacturers. In this case, the electrical connection box connected to the load-side wire harness by the harness manufacturer needs to connect the bus bar and the power-side wire harness at the car manufacturer, so the cover must not be attached to the case body containing the bus bar. Transported to car manufacturers. At the time of transportation, parts in the electrical junction box may fall off or be damaged. Therefore, when the load side wire harness is assembled by the harness manufacturer, the lower cover can be attached so that it can be transported to the car manufacturer. It is requested.

  A fuse box disclosed in Japanese Patent Laid-Open No. 9-55237 (Patent Document 1) is provided as an electrical connection box in which a wire harness is connected to a bus bar. As shown in FIG. 6, the crimp terminals 4 a and 4 a of the electric wires 4 and 4 are connected to the adjacent terminal fixing portions 2 a provided in the terminal connection chamber 2 of the fuse box 1 through the joint plate 3. The terminal fixing part 2a and the crimp terminal 4a are fixed by bolting.

  However, since the connection surface of the crimp terminal 4a with respect to the joint plate 3 is made the same with the above configuration, when the wires 4, 4 are connected in different steps, the wire 4 must be transported with the crimp terminal 4a exposed. In addition, there is a possibility that the crimp terminal 4 may be damaged by an external impact or the like, and the connection reliability is lowered, and the configuration is not adapted to the work process, and the work efficiency is deteriorated.

Further, in Japanese Patent Laid-Open No. 2001-345040 (Patent Document 2), as shown in FIG. 7, a first step portion 6 a is provided on the terminal mounting surface 6 of the fuse box unit 5, and the round plates of the wire harnesses 7 and 7 are provided. The positions of the terminal attachment portions 6b and 6b to which the terminal 7a is connected are vertically different.
However, since the connection of the round plate terminal 7a to the terminal mounting surface 6 is made on the same surface with respect to the terminal mounting portions 6b and 6b as in Patent Document 1, the wire harnesses 7 and 7 are connected in the same process. Therefore, connection reliability is lowered and work efficiency is deteriorated.

JP-A-9-55237 JP 2001-345040 A

The present invention has been made in view of the above problems, and it is a main problem to be able to perform the work of connecting the terminal of the wire harness terminal to the bus bar accommodated in the electrical connection box with good workability on the line of a different manufacturer. Yes.
In addition, it is a subject to prevent parts from falling off during transportation of electrical junction boxes between different manufacturers.

In order to solve the above-mentioned problem, the present invention provides a case main body provided with a first terminal hole connected to a power supply side terminal and a bolt and a second terminal hole connected to a load side terminal and a bolt. It has a bus bar housing part that houses the bus bar,
One of the first terminal hole and the second terminal hole of the bus bar is exposed on the upper surface of the case body, while the other is exposed on the lower surface of the case body,
The bus bar is bolted to the terminal of the power supply side wire harness terminal through the first terminal hole and is bolted to the terminal of the load side wire harness through the second terminal hole, and the power supply side wire harness is connected to the bus bar. An electrical connection box is provided in which the wire harness on the load side is connected from both the upper and lower sides.

  With the above configuration, the power supply side wire harness and the load side wire harness are not connected to the bus bar on the same surface, but are connected to be different from each other in the vertical direction. Even when assembled in different assembly lines, it is possible to adopt a configuration that conforms to the work process, and to improve workability.

The first terminal hole is exposed on the upper surface of the case body and is bolted to the terminal of the power supply side wire harness, while the second terminal hole is exposed on the lower surface of the case body and connected to the load side wire harness. Preferably it is done.
Usually, connection of the load side wire harness is made by a parts maker such as a harness maker, and connection of the power source side wire harness is made by a car maker. As described above, since the connection of the wire harness on the power source side and the load side is performed in different processes, it is possible to adopt a configuration conforming to the assembling work, and the workability at each manufacturer can be improved.

In the bus bar housing portion, a nut communicating with the upper portion of the second terminal hole exposed on the lower surface is embedded,
A window portion is provided on the upper surface of the bus bar accommodating portion to expose the first terminal hole, and a nut fixing cover is attached to a lower portion of the bus bar accommodating portion, and a lower portion of the first terminal hole is attached to the nut fixing cover. It is preferable that a nut communicating with the is fixed.
With the above configuration, since the nuts are arranged at positions communicating with the first terminal hole and the second terminal hole, the bolts are simply tightened to the terminals of the power supply side wire harness and the load side wire harness. The terminal of the wire harness can be firmly fixed to the bus bar with good workability.

It is preferable that a cover for closing the window portion after the bolting connection to the first terminal hole is provided, and a lower cover to be put on the case body after the bolting connection to the second terminal hole.
With the above configuration, the wire harness can be connected by covering the cover or the lower cover with either the power source side or the load side wire harness connected. Therefore, even if the connection of the other wire harness is performed on a different manufacturer's line, the connection reliability of the wire harness can be improved without damaging the terminal portion of the wire harness during the transportation of the electrical connection box. .

The case main body includes a fuse accommodating portion on one side of the bus bar accommodating portion, and a fuse cover that is covered after the fuse is attached to the fuse accommodating portion.
With the above configuration, in addition to the cover that closes the window portion of the bus bar housing portion, it has a fuse cover that covers the fuse housing portion, so when replacing the fuse during maintenance, it is only necessary to remove the fuse cover, Workability at the time of maintenance can be improved.

As described above, according to the present invention, the power-side wire harness and the load-side wire harness are not connected to the bus bar on the same surface, but are connected differently in the vertical direction. Even when the load-side wire harness is assembled on an assembly line of a different manufacturer, the construction can be made in accordance with the work process, and workability can be improved.
In addition, since the connection of the wire harness on the power source side and the load side is performed in different processes, it is possible to adopt a configuration in accordance with the assembling work, and workability at each manufacturer can be improved.

Embodiments of the present invention will be described with reference to the drawings.
1 to 5 show an electrical junction box of this embodiment.
As shown in FIG. 1, the electrical connection box 10 includes a case main body 13 including a bus bar accommodating portion 11 and a fuse accommodating portion 12, a single bus bar 14 routed in the case main body 13, and a bottom of the case main body 13. And a lower cover 15 that is covered from the side.

  As shown in FIG. 1 and FIG. 3 (A), to the bus bar 14, a power-side wire harness 20 is connected from the upper side, and a load-side wire harness 30 is connected from the lower side. A terminal of the power supply side wire harness 20 is provided with a power terminal 20a of a round terminal, and a terminal of the load side wire harness 30 is provided with a load side terminal 30a of a round terminal.

  As shown in FIGS. 4A to 4C, the bus bar 14 is formed of a single sheet obtained by punching a conductive metal plate, and is attached to the case body 13 from the lower surface side as shown in FIG. It has been. The bus bar 14 includes a terminal connection portion 14a made of a flat bus bar and a circuit portion 14b made of a vertical bus bar. From the lower end of the circuit portion 14b, a tuning fork terminal-like fuse connecting portion 14c projects from the upper side at a position facing a fuse connecting portion described later, and from a position facing a junction point described later, a booster A mounting portion 14d for attaching a cable (not shown) projects from the upper side.

The terminal connection portion 14a is provided with an elliptical first terminal hole 14e and a second terminal hole 14f provided side by side. As shown in FIGS. 2A and 2B, the power supply side terminal 20a is disposed on the upper surface 14h side of the terminal connection portion 14a with respect to the first terminal hole 14e, and is bolted to the power supply side terminal 20a.
On the other hand, the load side terminal 30a is disposed on the lower surface 14i side with respect to the second terminal hole 14f, and is bolted to the load side terminal 30a.
A rotation-stopping rib 14g is erected at a position close to the load-side terminal 30a connected to the second terminal hole 14f so that the load-side terminal 30a, which is a round terminal, does not rotate.

As shown in FIG. 1, the case main body 13 includes a bus bar accommodating portion 11 that accommodates a bus bar 14, and a fuse accommodating portion 12 in which a fuse is attached to one side portion of the bus bar accommodating portion 11. I have.
A nut fixing cover 16 that houses a first nut N1 for bolting and fixing to the power supply side terminal 20a is locked to the lower portion of the bus bar housing portion 11. A mounting portion 13 a provided with a mounting hole 13 b for a vehicle body projects from a side end portion of the case body 13.

The bus bar accommodating portion 11 is provided with a rectangular window portion 11a that exposes the first terminal hole 14e on the upper surface 13c of the case body, and the power supply side wire harness 20 is positioned and fixed continuously with the window portion 11a. A fixing portion 11b is provided. The fixing part 11b has a through hole 11c for clamping, and the clamp 20b of the power supply side wire harness 20 is inserted into the through hole 11c for clamping, and the power supply side terminal 20a of the round terminal rotates. Is preventing.
Since the lower surface 14i of the terminal connection portion 14a of the bus bar 14 attached to the case main body 13 from the lower cover 15 side is exposed on the case main body lower surface 13d, the second terminal hole 14f is also exposed.
A second nut housing portion 11d having a lower end opening for embedding a second nut N2 communicating with the second terminal hole 14f is provided on one side of the window portion 11a.

  The fuse housing portion 12 is provided with a fuse mounting portion 12a and a jumping point 12b, and the fuse mounted on the fuse mounting portion and the fuse connection portion 14c of the bus bar 14 are connected. At the jumping point 12b, the mounting portion 14d of the bus bar 14 is exposed, and a booster cable is attached when necessary.

  The bus bar accommodating portion 11 is provided with a cover 11e integrally formed through a thin hinge portion. The cover 11e is provided with a lock portion 11f, while the bus bar housing portion 11 is provided with a locked portion 11g. The cover 11e covers the bus bar accommodating portion 11 after the power supply side terminal 20a is bolted, and closes the window portion 11a.

As shown in FIG. 1, the lower cover 15 is provided with a locked portion 15b protruding outward from the peripheral wall 15a at a predetermined position, and the case body 13 is provided with a case body 13 as shown in FIG. In addition, a lock portion 13e is provided at a position facing the locked portion 15b. The lower cover 15 is bolted to the case body 13 from the lower side after the load side terminal 30a is bolted, and is locked.
The fuse accommodating portion 12 is covered with a detachable fuse cover 12c after the fuse is attached.

  As shown in FIG. 1 and FIGS. 5A to 5C, the nut fixing cover 16 is attached from the lower surface side of the bus bar accommodating portion 11 and is located at a position facing the window portion 11 a of the bus bar accommodating portion 11. A first nut housing portion 16a is provided. The first nut housing portion 16a has an upper end opening and houses a first nut N1 communicating with the first terminal hole 14e.

A terminal accommodating portion 16d including a peripheral wall 16b and a bottom wall 16c continuous to the peripheral wall 16b is provided at a position facing the second nut accommodating portion 11d. A bolt hole 16e is formed in the bottom surface 16c of the terminal accommodating portion 16d when the load side terminal 30a is bolted with the second bolt B2.
When the nut fixing cover 16 is attached to the case body 13, only the terminal connection portion 14a on the second terminal hole 14f side is exposed to the case body lower surface 13d, as shown in FIG. 3B.

As shown in FIGS. 1 and 2B, the load side terminal 30a and the second terminal hole 14f are connected by the second nut N2 and the second bolt B2 housed in the second nut housing portion 11d. The second terminal hole 14f exposed from the case lower surface 13d and the load side terminal 30b are bolted.
The power supply side terminal 20a and the first terminal hole 14e are connected from the window portion 11a by the first nut N1 and the first bolt B1 accommodated in the first nut accommodating portion 16a of the nut fixing cover 16. This is done by bolting the exposed first terminal hole 14e and the power supply side terminal 20a.

The assembly process of the electrical junction box 10 will be described.
The bus bar 14 is assembled to the case body 13 with the lower surface 13d of the case body as the upper side and the second nut N2 housed in the second nut housing portion 11d of the case body 13, and the load side terminal 30a of the load side wire harness 30 and the bus bar are assembled. 14 second terminal holes 14f are bolted and fixed by the second nut N2 and the second bolt B2. The nut fixing cover 16 in which the first nut N1 is accommodated in the first nut accommodating portion 16a is attached to the case main body 13 so as to cover the terminal connecting portion 14a of the bus bar 14, and the lower cover 15 is covered.

  Next, the case main body upper surface 13c is turned upward, and the power supply side terminal 20a of the power supply side wire harness 20 and the first terminal hole 14e of the bus bar 14 are bolted and fixed with the first nut N1 and the first bolt B1. Cover the cover 11e and attach the fuse cover 12c to the fuse accommodating portion 12.

With the above configuration, the power supply side wire harness 20 and the load side wire harness 30 are not connected to the bus bar 14 on the same surface, but are connected to be different from each other in the vertical direction. Even when the wire harness 30 is assembled in a different assembly line, it is possible to adopt a configuration in accordance with the work process, and workability can be improved.
Moreover, when the connection process of the power source side wire harness 20 and the load side wire harness 30 is different, it is possible to adopt a configuration in accordance with the assembling work, and the workability at each manufacturer can be improved.

It is a perspective view which shows the electrical junction box which concerns on this embodiment. It is a figure which shows the electric junction box of the state which removed the lower cover of FIG. 1, (A) is a top view, (B) is the sectional view on the AA line of (A). It is a figure which shows the electrical junction box of the state which removed the lower cover of FIG. 1, (A) is a front view, (B) is a back view. It is a figure which shows a bus bar, (A) is a front view, (B) is a top view, (C) is a right view. It is a figure which shows the cover for nut fixation, (A) is a top view, (B) is a front view, (C) is a back view. It is a figure which shows a prior art example. It is a figure which shows another prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Electrical junction box 11 Bus bar accommodating part 11a Window part 12 Fuse accommodating part 12c Fuse cover 13 Case main body 13c Case main body upper surface 13d Case main body lower surface 14 Bus bar 14e First terminal hole 14f Second terminal hole 15 Lower cover 16 Nut fixing cover 20 Power supply Side wire harness 20a power supply side terminal 30 load side wire harness 30a load side terminal

Claims (5)

The case body includes a bus bar housing portion that houses one bus bar provided with a first terminal hole that is bolted and connected to the power supply side terminal and a second terminal hole that is bolted and connected to the load side terminal,
One of the first terminal hole and the second terminal hole of the bus bar is exposed on the upper surface of the case body, while the other is exposed on the lower surface of the case body,
The bus bar is bolted to the terminal of the power supply side wire harness terminal through the first terminal hole and is bolted to the terminal of the load side wire harness through the second terminal hole, and the power supply side wire harness is connected to the bus bar. An electrical junction box, wherein the load-side wire harness is connected from above and below.   The first terminal hole is exposed on the upper surface of the case body and is bolted to the terminal of the power supply side wire harness, while the second terminal hole is exposed on the lower surface of the case body and connected to the load side wire harness. The electrical junction box according to claim 1. In the bus bar housing portion, a nut communicating with the upper portion of the second terminal hole exposed on the lower surface is embedded,
A window portion is provided on the upper surface of the bus bar housing portion to expose the first terminal hole, and a nut fixing cover is attached to a lower portion of the bus bar housing portion, and the nut fixing cover is attached to a lower portion of the first terminal hole. The electrical junction box according to claim 1 or 2, wherein a nut communicating with said is fixed.   4. The electric device according to claim 3, further comprising a cover that closes the window portion after the bolting connection to the first terminal hole, and a lower cover that covers the case body after the bolting connection to the second terminal hole. Connection box.   5. The case body according to claim 1, further comprising: a fuse housing portion on one side of the bus bar housing portion, and a fuse cover that is placed after the fuse is mounted on the fuse housing portion. The electrical junction box according to item 1.

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