JP2003264919A - Wiring device for power supply and manufacturing method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wiring device for power supply capable of facilitating positioning and assembling by temporarily fixing respective bus-bars and insulating members in layered conditions using a prescribed positional relation, and bolting the temporarily fixed wiring board to a case constituted of an insulation base or insulation material. <P>SOLUTION: Tubular parts 51 of insulation washers 50 are pressed into holes respectively formed at upper side bus-bars 21, an insulation substrate 40, and lower side bus-bars 31 to temporarily fix the upper side bus-bars 21, the insulation substrate 40, and the lower side bus-bars 31 in a layering condition. Therefore, the upper side bus-bars 21, the insulation substrate 40, and the lower side bus-bars 31 are integrated using the prescribed positional relation. The integrated wiring board assembly is tightened with a screw hole formed at the insulation base or the insulation case (not illustrated) by mounting screws 60. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply wiring device in which a wiring board assembly in which a plurality of bus bars are laminated in a state of being insulated by an insulating member and assembled is screwed to an insulating base or a case made of an insulating material. And a manufacturing method thereof.

[0002]

2. Description of the Related Art In a wiring device having a large power supply capacity, a bus bar is used as a wiring body. A large wiring area is required when a plurality of bus bars are spaced apart in a plane.
Therefore, a structure may be adopted in which a plurality of bus bars are laminated with an insulating member interposed therebetween.

Japanese Patent Laid-Open No. 2001-145241 discloses that
A boss for caulking is formed by projecting on an insulating substrate made of synthetic resin, and the insulating substrate and the bus bar are caulked by caulking the tip of the boss with the insertion hole provided in the bus bar inserted into the boss. There is described a technique for positioning the wiring board and stacking the insulating board and the bus bar to form a wiring board assembly. The insulating substrate is provided with a boss relief portion for accommodating the tip portion of the boss formed on another laminated insulation substrate, and the boss relief portion gradually increases from the outer peripheral portion to the central portion. It is formed to be deep.

Japanese Patent Laid-Open No. 2001-258127 discloses that
A bus bar having a bent terminal piece and an insulating substrate, while inserting the terminal piece into a through hole provided in the insulating substrate, to a wiring board in which the bus bar and the insulating substrate are alternately laminated and assembled, In a state in which the terminal piece is inserted into the insertion hole provided in the upper case, in an electric connection box adapted to fit the upper case and the lower case,
There is described an electrical junction box in which the width of the through hole is increased as it becomes the insulating substrate on the lower layer side to facilitate the work of inserting the terminal piece into a correct position.

[0005]

[Patent Document 1] Japanese Patent Application Laid-Open No. 2001-145
In the wiring assembly described in Japanese Patent No. 241, the boss formed on the insulating substrate is inserted through the insertion hole provided in the bus bar,
By crimping the tip of the boss, the positional relationship between the insulating substrate and the bus bar can be defined, but a crimping step is required.

Further, in the wiring assembly and the electric connection box described in JP 2001-145241 A and JP 2001-258127 A, an insulating substrate having a bus bar arranged at a predetermined position is laminated in a lower case. By storing in a state, the position of each insulating substrate is defined. Therefore, in order to define the positional relationship between the bus bar and the insulating substrate, a storage portion such as a lower case (or a mechanism for regulating the positions of the insulating substrates in a stacked state) is required.

For this reason, the conventional wiring assembly and electrical junction box have a problem in that it takes a lot of man-hours to mount the bus bar at a predetermined position on the insulating substrate by caulking. Further, there is a problem in that an accommodating portion for stacking the insulating boards to which the bus bars are attached in a predetermined positional relationship is required, and an extra space is required due to the provision of the accommodating portion.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a power supply wiring device which is easy to assemble and which enables wiring in a small space.

[0009]

The above object is to provide a plurality of bus bars laminated to each other, one or a plurality of insulating members located between the plurality of laminated bus bars, and the bus bar and the insulating member in a laminated state. A through hole penetrating the through hole, and a tubular portion made of an insulating material and having an outer diameter substantially equal to the hole diameter of the through hole, and an insulating washer press-fitted into the through hole. To be achieved.

In the power supply wiring device of the present invention, the periphery of the insulating member has a region protruding from the periphery of the bus bar.

In the above power supply wiring device of the present invention, the through hole of the bus bar has an enlarged diameter portion for ensuring a creeping distance.

The power supply wiring device of the present invention is characterized in that the through holes of the plurality of bus bars have different hole diameters.

In the above power supply wiring device of the present invention, the cylindrical portion of the insulating washer has an outer diameter adapted to each of the different hole diameters.

In the above power supply wiring device of the present invention, the bus bar has a mounting portion for mounting an electric component.

Further, the above object is to press-fit an insulating washer having a tubular portion made of an insulating material and having an outer diameter substantially equal to the hole diameter of each through hole into the through holes formed in the plurality of bus bars and the insulating member, This is achieved by a method for manufacturing a power supply wiring device, characterized in that the bus bars and the insulating member are temporarily fixed in a predetermined laminated state.

In the method for manufacturing a power supply wiring device of the present invention, a screw is inserted through the insulating washer, and the temporarily fixed bus bars and the insulating member are screwed to an insulating base or a case made of an insulating material. It is characterized by doing.

As described above, according to the present invention, when the wiring board assembly in which the plurality of bus bars are insulated and mounted via the insulating member is screwed to the insulating base or the case made of the insulating material, the bus bar and the insulating member are attached to each other. By press-fitting the formed through hole with an insulating washer provided with a tubular portion made of an insulating material and having an outer diameter substantially equal to the hole diameter of each through hole,
Positioning and assembling is facilitated by temporarily fixing each bus bar and insulating member in a laminated state with a predetermined positional relationship, and screwing this temporarily fixed wiring board assembly to the insulating base or case made of insulating material. ing.

By inserting the tubular portion of the insulating washer through the through hole formed in the bus bar and the through hole formed in the insulating member, the positional relationship between the bus bar and the insulating member is regulated and positioned, and at the same time, each bus bar is The insulating members are temporarily fixed in a laminated state and integrated in a laminated state. Therefore, since the integrated wiring board assembly may be screwed to the insulating base or the case, the assembly work of the wiring board assembly becomes easy.

By providing an electric component mounting portion at the end of the bus bar, electric components such as fuses and resistors can be mounted.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A power supply wiring device according to an embodiment of the present invention will be described with reference to FIGS. 1 is a perspective view of a power supply wiring device according to the present embodiment, and FIG.
4 is an exploded perspective view of the power supply wiring device according to the present embodiment, FIG. 3 is a plan view of the power supply wiring device according to the present embodiment, and FIG.
FIG. 3 is a cross-sectional view of the power supply wiring device according to the present embodiment.
Note that FIG. 4 shows a cross section taken along the line AA of FIG.

Power supply wiring device 10 according to the present embodiment
Is an upper bus bar assembly 20 and a lower bus bar assembly 30.
And an insulating substrate 40 and insulating washers 50, 50. In the state where the upper bus bar assembly 20, the insulating substrate 40, and the lower bus bar assembly 30 are stacked (laminated) in this order, two positions are formed on each of the upper bus bar assembly 20, the insulating substrate 40, and the lower bus bar assembly. By press-fitting the cylindrical portion 51 of each insulating washer 50 into the through hole of the above, the positional relationship between the upper busbar assembly 20, the insulating substrate 40, and the lower busbar assembly 30 is regulated, and the upper busbar assembly 20 and the insulating substrate 40 are also regulated. And the lower bus bar assembly 30 are integrated (temporarily fixed).

The integrated wiring board assembly is placed on a power supply wiring device mounting portion such as an insulating base or an insulating case (not shown), and mounting screws 60, 60 are respectively inserted into the respective insulating washers 50 for the power supply (not shown). Screw into two screw holes (not shown) formed in the wiring device mounting portion. Then, the power supply wiring device 10 is assembled by mounting the tubular fuses 70, 70 on the fuse mounting brackets, respectively.

The upper bus bar assembly 20 includes the upper bus bar 2
1 and the fuse mounting brackets 23, 23 attached to the tip of the upper bus bar 21 by the fuse mounting bracket mounting screws 22, 22. Fuse mounting bracket 2
3 is formed by bending a highly conductive metal plate having a spring property, such as phosphor bronze. Fuse fitting 23
Has a hole for inserting the fuse mounting bracket mounting screws 22, 22 on the bottom surface thereof, and the cylindrical fuse 70
A pair of mounting arm portions for sandwiching the terminal portion of the.

The upper bus bar 21 is formed by processing a metal plate material having good conductivity such as copper. In the present embodiment, upper bus bar 21 is formed in an L shape. The upper bus bar 21 has a bus bar main body 21a, a terminal mounting portion 21b on the base end side, and a fuse mounting metal fitting mounting portion 21c on the tip end side. The bus bar body 21a has two positioning / mounting holes (through holes) 20A, 2
0B is formed. Positioning and mounting hole (through hole)
20A and 20B are provided near the terminal mounting portion 21b and near the fuse mounting metal fitting mounting portion 21c, respectively. The terminal mounting portion 21b is formed with a screw hole 21d for screwing a power supply line terminal or a receiving wire terminal (not shown). The fuse mounting metal fitting mounting portion 21c is provided with screw holes 21e and 21e for screwing the fuse mounting metal fittings 23 and 23, respectively.

The terminal mounting portion 21b forms a stepped portion by bending a metal plate material having good conductivity 90 degrees upward and further bending the tip side thereof 90 degrees downward. The stepped portion secures a predetermined space between the terminal mounting portion 21b having the screw hole 21d and the lower bus bar 31. As a result, in the state where the power supply line terminal or the receiving wire terminal (not shown) is attached to the terminal attaching portion 21b with a screw or a screw (not shown),
A predetermined distance can be maintained between the tip of the screw or screw and the lower bus bar 31.

The fuse mounting metal fitting mounting portion 21c forms a step portion by bending a good conductive metal plate material 90 degrees upward and further bending the tip side thereof 90 degrees downward. The stepped portion secures a predetermined space between the fuse mounting metal fitting mounting portion 21c having the screw hole 21e and the lower bus bar 31. As a result, in a state in which the fuse mounting bracket 23 is mounted by the fuse mounting bracket mounting screw 22, it is possible to maintain a predetermined distance between the tip of the fuse mounting bracket mounting screw 22 and the lower bus bar 31.

The lower bus bar assembly 30 includes the lower bus bar 3
1 and the fuse mounting metal fittings 33, 33 attached to the tip portion of the lower bus bar 31 by the fuse mounting metal fitting mounting screws 32, 32. Fuse fitting 3
3 is formed by bending a highly conductive metal plate having a spring property, such as phosphor bronze. Fuse fitting 3
3 has holes for inserting the fuse mounting bracket mounting screws 32, 32 on the bottom surface, and the cylindrical fuse 7
It is provided with a pair of mounting arm portions for sandwiching the 0 terminal portion.

The lower bus bar 31 is formed by processing a metal plate material having good conductivity such as copper. In the present embodiment, lower bus bar 31 is formed in an L shape. The lower bus bar 31 has a bus bar main body portion 31a, a base end side terminal mounting portion 31b, and a tip end side fuse mounting metal fitting mounting portion 31c. Positioning and mounting holes (through holes) 30A, 30B (3
OB (not shown) is formed at two locations. The positioning / mounting holes 30A and 30B are provided near the terminal mounting portion 31b and near the fuse mounting metal fitting mounting portion 31c, respectively. The terminal mounting portion 31b has a screw hole 31d for screwing a power supply line terminal or a receiving wire terminal (not shown).
Are formed. The fuse mounting bracket mounting portion 31c is formed with screw holes 31e and 31e for screwing the fuse mounting brackets 33 and 33, respectively.

The terminal mounting portion 31b forms a stepped portion by bending a metal plate material having good conductivity 90 degrees upward and further bending the tip side thereof 90 degrees downward. The stepped portion secures a predetermined space between the terminal mounting portion 31b having the screw hole 31d formed therein and the power wiring device mounting portion such as an insulating base or an insulating case (not shown). With this, in a state where the power supply line terminal or the receiving wire terminal (not shown) is attached to the terminal mounting portion 21b by the screw or the screw or the like (not shown), the tip of the screw or the screw and the insulating base or the insulating case or the like not shown A predetermined space can be maintained between the power wiring device mounting portion.

The fuse mounting metal fitting mounting portion 31c forms a stepped portion by bending a metal plate material having good conductivity upward by 90 degrees and further bending the tip side thereof downward by 90 degrees. The stepped portion secures a predetermined space between the fuse mounting bracket mounting portion 31c in which the screw hole 31e is formed and the power wiring device mounting portion such as an insulating base or an insulating case (not shown). As a result, with the fuse mounting bracket 33 attached by the fuse mounting bracket mounting screw 32, the tip of the fuse mounting bracket mounting screw 32 and a power wiring device mounting portion such as an insulating base or an insulating case (not shown) A predetermined interval can be maintained between the two. Note that, in a state where the upper bus bar 21 and the lower bus bar 31 are stacked via the insulating substrate 40, the fuse mounting metal fitting mounting portion 21c of the upper bus bar 21 and the fuse mounting metal fitting mounting portion 31c of the lower bus bar 31 are on the same surface. It is supposed to become.

The insulating substrate 40 includes the bus bars 21, 31 provided between the upper bus bar 21 and the lower bus bar 31.
It is provided to electrically insulate the space. The insulating substrate 40 is formed using a plate material or a sheet material made of an insulating material. Positioning and mounting holes (through holes) 40A and 40B (40B is not shown) are formed in the insulating substrate 40 at two locations.

The insulating substrate 40 is formed to be larger than the bus bar body 21a of the upper bus bar 21 (bottom surface of the upper bus bar). Therefore, in a state where the upper bus bar 21, the insulating substrate 40, and the lower bus bar 31 are stacked in a predetermined positional relationship, the insulating substrate 40 projects outside the outer periphery of the upper bus bar 21. In the lower bus bar 31, the shape of the portion of the upper bus bar 21 that faces the bus bar body 21a (bottom surface of the upper bus bar) is the same as the shape of the upper bus bar 21. As a result, in a state in which the busbars 21 and 31 are stacked with the insulating substrate 40 interposed therebetween, the insulating substrate 40 projects outward from the outer peripheral portion of the busbars 21 and 31. Therefore, the insulating substrate 4
By properly setting the protrusion amount of 0, each bus bar 2
It is possible to secure a creeping distance corresponding to the withstand voltage required between 1 and 31.

The insulating washer 50 is made of an insulating material such as resin. The insulating washer 50 includes a tubular portion 51 having an insertion hole through which the mounting screw 60 is inserted. Tube 5
The outer diameter of 1 is the positioning / mounting holes 20 formed in the bus bars 21 and 31 and the insulating substrate 40, respectively.
The hole diameters of A, 20B, 30A, 30B, 40A and 40B are substantially the same.

Therefore, the positions of the positioning / mounting holes 20A, 20B, 30A, 30B, 40A, 40B formed in the bus bars 21, 31 and the insulating substrate 40 are made to coincide with each other, and the upper bus bar 21, the insulating substrate 40, In a state where the lower bus bar 31 is stacked (stacked) in this order, the tubular portion 51 of the insulating washer 50 is provided with the positioning / mounting holes 20A, 20B, 30A, 30B, 40A, 40.
By press-fitting into B, the upper bus bar 21 and the insulating substrate 4
0 and the lower bus bar 31 can be temporarily fixed and integrated in a state of being overlapped. Therefore, the integrated wiring board assembly may be screwed to an insulating base or case (not shown), which facilitates the assembly work of the wiring board assembly. The upper bus bar 2 is provided by the tubular portion 51 of the insulating washer 50.
1, the positional relationship between the insulating substrate 40 and the lower bus bar 31 is regulated, so that the insulating substrate 40 can secure a predetermined creepage distance between the upper bus bar 21 and the lower bus bar 31, and each fuse Since the mounting brackets 23 and 33 are located at predetermined positions, the tubular fuse 70 can be mounted accurately.

In the present embodiment, the fuse fitting 2
The example in which the busbar assemblies 20 and 30 to which the numbers 3 and 33 are attached are stacked via the insulating substrate 40 has been shown. However, the insulating washer 50 is placed in a state in which the upper busbar 21, the insulating substrate 40, and the lower busbar 31 are stacked. The fuse mounting brackets 23 and 33 may be attached after the wiring board assembly, which is temporarily fixed and integrated through the above, is attached to an insulating base or case (not shown) using the attaching screws 60. In addition, in the present embodiment, an example in which the tubular fuse 70 is arranged between the bus bars 21 and 31 has been described, but the bus bars 21 and 31 are not shown.
Electronic components such as resistors and diodes may be connected between them.

FIG. 5 is an explanatory view showing the dimensional relationship of the plate thickness of each bus bar 21, 31, the plate thickness of the insulating substrate 40, and the tubular portion of the insulating washer 50. The plate thickness of the upper bus bar 21 is t1,
When the plate thickness of the insulating substrate 40 is t2 and the plate thickness of the lower bus bar 31 is t3, the length L of the tubular portion 51 of the insulating washer 50 is sufficiently longer than t1 + t2 and is t1 + t2 + t3.
Same as or slightly shorter than that.

6 to 9 are enlarged views of the essential parts showing a modification of the power supply wiring device according to the present embodiment. In the structure shown in FIG. 5, the upper bus bar 21 and the lower bus bar 3
The insulating distance between 1 and 1 is the plate thickness t2 of the insulating substrate 40. By increasing the plate thickness t2 of the insulating substrate 40, the withstand voltage between the upper bus bar 21 and the lower bus bar 31 can be increased, but a plurality (three or more) of bus bars are respectively interposed via the insulating plate. In the case of stacking layers, the thickness of the power supply wiring device becomes large. Therefore, as shown in FIG. 6, a positioning / mounting hole (through hole) 3 for the lower bus bar 31 is formed.
A tapered (mortar-shaped) expanded portion 80 may be formed on the side of the 0A, 30B contacting the insulating substrate 40 to secure a creeping distance between the upper bus bar 21 and the lower bus bar 31. .

Further, as shown in FIG. 7, the upper bus bar 2
With respect to No. 1 as well, by forming a tapered expanded portion 81 on the side of the positioning / mounting holes 20A, 20B that contacts the insulating substrate 40, the creeping distance between the upper bus bar 21 and the lower bus bar 31 is further increased. You may

Further, as shown in FIG. 8, the upper bus bar 2
By forming the tapered expanded portion 82 on the side (the upper side in the figure) of the positioning / mounting holes 20A, 20B which does not contact the insulating substrate 40, the cylindrical portion 51 of the insulating washer 50 can be easily press-fitted. You may do it.

Further, as shown in FIG. 9, the upper bus bar 2
By setting the hole diameter DA of the positioning / mounting holes 20A, 20B of 1 to be larger than the hole diameter DB of the positioning / mounting holes 40A, 40B of the insulating substrate 40 and the positioning / mounting holes 30A, 30B of the lower bus bar 31, the upper bus bar A creepage distance between 21 and the lower bus bar 31 may be secured. In this case, the cylindrical portion 51 of the insulating washer 50 is
It has a two-stage structure including a large-diameter cylindrical portion corresponding to the hole diameter DA of the positioning / mounting holes 20A, 20B of the upper busbar 21 and a small-diameter cylindrical portion corresponding to the hole diameter DB of the positioning / mounting holes 30A, 30B of the lower busbar 31. . The length of the large-diameter cylindrical portion corresponding to the hole diameter DA of the positioning / mounting holes 20A, 20B of the upper bus bar 21 is set to be equal to or slightly shorter than the plate thickness t1 of the upper bus bar 21. By making the hole diameters of the positioning and mounting holes different between the upper bus bar 21 and the lower bus bar 31, it is possible to prevent a mistake in the stacking order of the bus bars 21, 31.

[0041]

As described above, in the power supply wiring device according to the present invention, the positional relationship between the busbars and the insulating members is regulated by using the tubular portion of the insulating washer, and the busbars and the insulating members are predetermined. Since they are temporarily fixed in the state of being laminated in a positional relationship, the temporarily fixed wiring board assembly can be easily screwed to the insulating base or the case made of an insulating material.

Further, the power supply wiring device according to the present invention is
Since the busbar and the insulating member can be assembled in a stacked state without using a storage section or a case that stores the stacked busbar and the insulating member, the electrical connection box such as a fuse box, a relay box, and a control box can be downsized. And economicization can be achieved.

[0043]

[Brief description of drawings]

FIG. 1 is a perspective view of a power supply wiring device according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the power supply wiring device according to the embodiment of the present invention.

FIG. 3 is a plan view of the power supply wiring device according to the embodiment of the present invention.

FIG. 4 is a cross-sectional view of a power supply wiring device according to an embodiment of the present invention.

FIG. 5 is an explanatory diagram showing the dimensional relationship of the plate thickness of each bus bar, the plate thickness of the insulating substrate, and the tubular portion of the insulating washer.

FIG. 6 is an enlarged view of a main part showing a first modification of the power supply wiring device according to the embodiment of the present invention.

FIG. 7 is an enlarged view of main parts showing a second modification of the power supply wiring device according to the embodiment of the present invention.

FIG. 8 is an enlarged view of essential parts showing a third modification of the power supply wiring device according to the embodiment of the present invention.

FIG. 9 is an enlarged view of main parts showing a fourth modification of the power supply wiring device according to the embodiment of the present invention.

[Explanation of Codes] 10 Wiring device for power supply 20 Upper busbar assembly 20A, 20B, 30A, 30B, 40A, 40B Positioning and mounting hole (through hole) 21 Upper busbar 21a Busbar body 21b Terminal mounting portion 21c Fuse mounting bracket mounting 21d, 21e Screw hole 30 Lower busbar assembly 31 Lower busbar 31a Busbar body 31b Terminal mounting part 31c Fuse mounting bracket mounting part 40 Insulating board 50 Insulating washer 51 Insulating washer barrel 60 Mounting screw 70 Cylindrical fuse

Claims (8)

[Claims] 1. A plurality of bus bars stacked on each other, one or a plurality of insulating members located between the plurality of stacked bus bars, a through hole penetrating the bus bar and the insulating member in a stacked state, and insulating A power supply wiring device comprising: a cylindrical portion made of a material and having an outer diameter substantially equal to the hole diameter of the through hole, and an insulating washer press-fitted into the through hole. 2. The wiring device for power supply according to claim 1, wherein the periphery of the insulating member has a region projecting from the periphery of the bus bar. 3. The power supply wiring device according to claim 1, wherein the through hole of the bus bar has an enlarged diameter portion for ensuring a creepage distance. apparatus. 4. The power supply wiring device according to claim 1, wherein the through holes of the plurality of bus bars have different hole diameters. 5. The power supply wiring device according to claim 4, wherein the tubular portion of the insulating washer has an outer diameter adapted to each of the different hole diameters. 6. The wiring device for power supply according to claim 1, wherein the bus bar includes a mounting portion for mounting an electric component. . 7. An insulating washer having a cylindrical portion made of an insulating material and having an outer diameter substantially equal to the hole diameter of each through hole is press-fitted into the through hole formed in the plurality of bus bars and the insulating member. A method of manufacturing a wiring device for a power supply, which comprises temporarily fixing the insulating member in a predetermined laminated state. 8. A method of manufacturing a wiring device for a power supply according to claim 7, wherein a screw is inserted through the insulating washer to temporarily fix each of the bus bars and the insulating member made of an insulating base or an insulating material. A method for manufacturing a wiring device for a power supply, characterized in that the wiring device for the power supply is screwed to the.