CN112397361A

CN112397361A - Fuse mounting block

Info

Publication number: CN112397361A
Application number: CN201910752419.5A
Authority: CN
Inventors: 荒川智宏; 铃木孝充
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2019-08-14
Filing date: 2019-08-14
Publication date: 2021-02-23
Anticipated expiration: 2039-08-14
Also published as: CN112397361B

Abstract

A miniaturized fuse mounting block. The fuse mounting block includes a block main body, a plurality of fuse units, a power supply side bus bar, a fuse side bus bar, and a fastening member. The block main body has a plurality of terminal connection ports into which cable terminals for connecting electrical components can be fitted. The fuse unit includes a plurality of fuses connected to cable terminals fitted to the terminal connection ports. The fuse-side bus bar conducts the power-side bus bar to each fuse of the fuse unit. The fastening member connects the power-supply-side bus bar and the fuse-side bus bar. The plurality of fuse units are mounted side by side on the block main body so that fuse array directions of the fuse units are parallel to each other. The plurality of terminal connection ports are arranged on the block main body so as to correspond to the fuse arrangement of each fuse cell. At least a part of the shaft portion of the fastening member is disposed between the rows of the terminal connection ports corresponding to the adjacent fuse mounting blocks.

Description

Fuse mounting block

Technical Field

The present invention relates to a fuse mounting block on which a plurality of fuses are mounted.

Background

A plurality of electrical components are mounted on a vehicle. In an electric circuit of an electric component, a fuse is interposed to protect the electric component from an overcurrent. In a vehicle or the like using a plurality of electrical components, a plurality of fuses corresponding to the respective electrical components may be mounted in a single fuse mounting block in a collective manner.

The fuse mounting block has a plurality of terminal connection ports formed in a block main body made of resin. A cable terminal (connector) for connecting an electrical component can be connected to the terminal connection port. A fuse mounting portion on which a plurality of fuses are mounted is provided in the block main body. Each fuse mounted on the fuse mounting portion is connected to the energizing circuit of the corresponding motor component via a cable terminal fitted to the terminal connection port. Further, a bus bar for connecting a power source such as a battery or a generator to a plurality of fuses is attached to the block main body (see, for example, patent document 1).

In the fuse mounting block described in patent document 1, a plurality of fuse mounting portions are arranged in a plurality of rows in a block main body so that fuse arrangement directions of the fuse mounting portions are parallel to each other. In addition, the bus bar includes: a power supply side bus connected to a power supply; and a plurality of fuse-side bus bars connecting the power-side bus bar to the fuses of the row of the fuse mounting portions. The fuse-side bus bar and the power-side bus bar are integrally connected by welding or the like.

In recent years, in such a fuse mounting block, it has been desired to detachably connect the fuse-side bus bar and the power-side bus bar by fastening members such as bolts and nuts in order to easily cope with a change in specifications of the fuse-side bus bar.

However, when the shaft portions of the fastening members for connecting the fuse-side bus bar and the power-side bus bar are disposed at substantially the same height as the plurality of terminal connection ports of the block body, the shaft portions of the fastening members must be separated from the terminal connection ports in order to avoid interference therebetween. In particular, in the case where the rows of the plurality of fuse mounting portions are arranged in parallel in the block main body as in the fuse mounting block described in patent document 1, when the arrangement direction of the fuses of each row is the same as the extending direction of the shaft portion of the fastening member, the block main body is long in one direction. Therefore, the fuse mounting block becomes large.

Prior art documents

Patent document

Patent document 1: japanese laid-open patent No. 2008-125317

Disclosure of Invention

Problems to be solved by the invention

The invention aims to miniaturize a fuse mounting block.

Means for solving the problems

The present invention relates to a fuse mounting block, including: a block body having a plurality of terminal connection ports into which cable terminals for connecting electrical components can be fitted; a plurality of fuse units attached to the block main body and having a plurality of fuses connected to cable terminals fitted to the terminal connection ports; a power source side bus connected to a power source; a fuse-side bus that connects the power-side bus to each of the fuses of the fuse unit; and a fastening member that connects the power supply side bus bar and the fuse side bus bar, wherein the plurality of fuse units are mounted side by side in the block main body so that fuse array directions of the fuse units are parallel to each other, the plurality of terminal connection ports are arranged in the block main body so as to correspond to the fuse arrays of the fuse units, and a shaft portion of the fastening member is arranged parallel to the fuse array directions of the fuse units.

According to the above configuration, the shaft portion of the fastening member connecting the power source side bus bar and the fuse side bus bar is disposed to overlap a part of the terminal connection port of the block main body in the fuse arrangement direction of the fuse unit. Therefore, the fuse mounting block can be miniaturized.

Preferably, the terminal connection port in the region overlapping the shaft portion is a terminal connection port other than the terminal connection port having the largest width in a direction orthogonal to the arrangement direction.

In this case, the shaft portion of the fastening member can be arranged to overlap a part of the terminal connection ports without separating the entire arrangement of the adjacent terminal connection ports. Therefore, the fuse mounting block can be miniaturized not only in the fuse arrangement direction of the fuse unit but also in the direction orthogonal to the fuse arrangement direction of the fuse unit.

The fuse-side bus bar may be present in a one-to-one relationship with the fuse unit, and two fuse-side bus bars corresponding to adjacent fuse units may overlap each other and may be connected to the power-supply-side bus bar by the fastening member.

In this case, the number of fuse cells to be used can be easily changed according to the application. That is, in a certain application, two fuse cells may be connected to one power source side bus bar, and in another application, only one fuse cell may be connected to one power source side bus bar. In the case where only one fuse unit is connected to one power source side bus bar, only one fuse side bus bar is connected to the power source side bus bar.

The following structure is also possible: the fastening member includes: a bolt having the shaft portion; and a nut that is held by the block main body so as to be slidably displaceable in the axial direction while being restricted in rotation by the block main body.

In this case, when the bolt is screwed in, the nut is displaced in the direction of the contact portion between the fuse-side bus bar and the power-side bus bar in accordance with the screwing. When the bolt is screwed more than a certain degree, the fuse-side bus bar and the power-supply-side bus bar are pressed and connected to each other. When the number of fuse-side bus bars used changes, the amount of displacement in the axial direction of the nut when the bolt is screwed changes. In the case of this structure, the displacement amount of the nut changes depending on the number of fuse-side bus bars used, and therefore the shaft portion of the bolt needs to have a sufficient length. However, in this configuration, since the shaft portion of the bolt is disposed to overlap a part of the terminal connection port of the block main body, an increase in size of the fuse mounting block can be avoided.

Effects of the invention

In the fuse mounting block of the present invention, the shaft portion of the fastening member connecting the power source side bus bar and the fuse side bus bar is disposed to overlap a part of the terminal connection port of the block main body, so that the fuse mounting block can be downsized.

Drawings

Fig. 1 is a plan view of a fuse mounting block according to the embodiment.

Fig. 2 is a bottom view of the fuse mounting block according to the embodiment.

Fig. 3 is a sectional view taken along the line III-III of fig. 1.

Fig. 4 is a perspective view of a terminal connection port of the fuse mounting block according to the embodiment.

Fig. 5 is a cross-sectional view taken along the line III-III in fig. 1 in the case where the number of fuse-side bus bars is different.

Description of reference numerals:

1 fuse mounting block

10a, 10b, 10c terminal connection port

11 main body

12 cable terminal

14A, 14B, 15A, 15B fuse unit

18A, 18B power supply side bus

22A, 22B first fuse side bus (fuse side bus)

23A, 23B second fuse side bus (fuse side bus)

24 bolt (fastening connecting component)

24a shaft part

25 nuts (fastening connection members).

Detailed Description

Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 is a plan view of a fuse mounting block 1 according to the embodiment, and fig. 2 is a bottom view of the fuse mounting block 1.

The fuse block 1 is housed in a case not shown, for example, an engine room of a vehicle. The fuse mounting block 1 includes a block body 11, and the block body 11 has a plurality of

terminal connection ports

10a, 10b, and 10 c. The block body 11 is formed of an insulating resin in a substantially rectangular parallelepiped shape.

Fig. 3 is a sectional view taken along the line III-III in fig. 1, and fig. 4 is a perspective view showing the terminal connection ports 10a (10b, 10c) of the block body 11.

As shown in fig. 4, the cable terminal 12 (connector) for connecting electrical components can be fitted into the

terminal connection ports

10a, 10b, and 10 c. The cable terminal 12 is connected to one end of the cable 13. The other end of the cable 13 is connected to an unshown electrical component. As shown in fig. 1 and 2, the

terminal connection ports

10a, 10b, and 10c are open on the back side of the block body 11. The cable terminal 12 is formed in different sizes according to the diameter of the connected cable 13. Therefore, the sizes of the

terminal connection ports

10a, 10b, and 10c are also different depending on the size of the cable terminal 12 to be fitted.

A plurality of

fuse units

14A, 14B, 15A, 15B are detachably mounted on the upper surface side of the block main body 11. Each of the

fuse units

14A, 14B, 15A, and 15B has a plurality of fuses, not shown, mounted in a box-shaped fuse box 16. The fuse is detachably mounted to the fuse block 16. The fuses mounted on the fuse box 16 are connected to the cable terminals 12 fitted to the corresponding

terminal connection ports

10a, 10b, and 10 c.

A plurality of fuses are arranged in a row from one end side to the other end side in the longitudinal direction of the fuse box 16 in each of the

fuse units

14A, 14B, 15A, and 15B. The plurality of

fuse units

14A, 14B, 15A, and 15B are mounted side by side on the upper surface side of the block main body 11 so that the arrangement directions of the fuses are parallel to each other. The plurality of

fuse units

14A, 14B, 15A, 15B are attached to the block main body 11 such that the longitudinal direction of each fuse box 16 is along the longitudinal direction of the block main body 11. The

terminal connection ports

10a, 10B, and 10c of the block main body 11 are arranged so as to correspond to the fuse arrangement of the

fuse cells

14A, 14B, 15A, and 15B.

A recess 17 that opens to one end side in the longitudinal direction is provided at one end in the longitudinal direction of the block body 11. The lower side of the recess 17 is closed by a busbar support block 19. The bus bar support block 19 is fixed to the block main body 11.

A pair of power supply

side bus bars

18A and 18B are mounted inside the recess 17. The pair of power supply side bus bars 18A, 18B are formed in the same shape. As shown in fig. 3, the power source

side bus bars

18A and 18B are formed of a metal plate having a substantially L-shaped side view. The power supply side bus bars 18A, 18B have a power supply side connecting piece 18A extending substantially horizontally in fig. 3, and a fuse side connecting piece 18B extending downward in fig. 3 from one end of the power supply side connecting piece 18A.

A connection terminal of a power cable, not shown, is connected to each power-side connection piece 18A of the power-

side bus bars

18A and 18B. The connection terminal is connected to the power supply side connection piece 18a by a bolt not shown in the figure in a state of overlapping with the power supply side connection piece 18 a. Note that, reference numeral 20 in the figure is a bolt insertion hole of the power supply side connection piece 18a through which a bolt passes. The power supply side connecting piece 18a is fastened and connected to the bus bar support block 19 by a connecting bolt. The other end of the power cable connected to one power source side bus bar 18A is connected to a battery of the vehicle, and the other end of the power cable connected to the other power source side bus bar 18B is connected to a generator of the vehicle. Conversely, the other end of the power cable connected to one power source side bus bar 18A may be connected to the generator, and the other end of the power cable connected to the other power source side bus bar 18B may be connected to the battery of the vehicle. Depending on the usage, only one of the one power supply side bus bar 18A and the other power supply side bus bar 18B may be connected to a battery or a generator of the vehicle.

The main fuse

connection bus bars

21A and 21B overlap the fuse-side connecting pieces 18B of the power supply

side bus bars

18A and 18B from the block body 11 side (left side in fig. 1 and 3). The first fuse-

side bus bars

22A and 22B are respectively superposed on the block main bodies 11 of the main fuse-connecting

bus bars

21A and 21B, and the second fuse-

side bus bars

23A and 23B are respectively superposed on the block main bodies 11 of the first fuse-

side bus bars

22A and 22B. The power source side bus bars 18A, 18B, the main fuse connection bus bars 21A, 21B, the first fuse side bus bars 22A, 22B, and the second fuse side bus bars 23A, 23B are connected by bolts 24 and nuts 25 as fastening members in a state where four pieces are overlapped, respectively.

The main fuse

connection bus bars

21A and 21B are formed of flat metal plates. A main fuse 26 is disposed between the two

bus bars

21A, 21B. The main fuse 26 is electrically connected to the bus bars 21A, 21B.

As shown in fig. 1, the first fuse-

side bus bars

22A and 22B are formed of a metal plate having a substantially L-shape in plan view. The first fuse-side bus bars 22A, 22B have power-supply-side connecting pieces 22A overlapping the main fuse-connecting

bus bars

21A, 21B, and fuse-side connecting pieces 22B extending from one ends of the power-supply-side connecting pieces 22A in the longitudinal direction of the block body 11. The fuse-side connecting piece 22b is accommodated in a bus bar accommodating groove formed in the upper surface of the block body 11. Each of the fuse-side connecting pieces 22B is connectable to a plurality of fuses housed in each of the fuse boxes 16 of the

fuse units

14A, 14B.

The second fuse-side bus bars 23A, 23B are formed of a metal plate having a substantially L-shape in plan view, similarly to the first fuse-side bus bars 22A, 22B. The second fuse-side bus bars 23A, 23B have a power-side connecting piece 23A overlapping the power-side connecting piece 22A of the first fuse-side bus bars 22A, 22B, and a fuse-side connecting piece 23B extending from one end of the power-side connecting piece 23A in the longitudinal direction of the block body 11. The fuse-side connecting piece 23b is accommodated in a bus bar accommodating groove formed in the upper surface of the block body 11. Each of the fuse-side connecting pieces 23B is connectable to a plurality of fuses housed in each of the fuse boxes 16 of the

fuse units

15A, 15B.

Here, the shaft portion 24A of the upper bolt 24 in fig. 1, which is connected in a state where the power source side bus bar 18A, the main fuse connection bus bar 21A, the first fuse side bus bar 22A, and the second fuse side bus bar 23A are overlapped, is arranged in parallel to the fuse arrangement direction of the upper two

fuse cells

14A, 15A. The distal end side of the shaft portion 24A is disposed between the rows of the

terminal connection ports

10a, 10b, and 10c in the two rows corresponding to the two

upper fuse cells

14A and 15A adjacent to each other. Specifically, the tip end side of the shaft portion 24a is disposed between the upper and lower terminal connection ports 10a on the side close to the power-supply-side bus bar 18A in the arrangement of the

terminal connection ports

10a, 10b, and 10c in the upper two adjacent rows.

Similarly, the shaft portion 24a of the lower bolt 24 in fig. 1 is arranged parallel to the fuse array direction of the lower two

fuse cells

14B, 15B. The tip end side of the shaft portion 24a is disposed between the arrays of the

terminal connection ports

10a, 10B, and 10c in two rows corresponding to the two

lower fuse cells

14B and 15B adjacent to each other. Specifically, the tip end side of the shaft portion 24a is disposed between the upper and lower terminal connection ports 10a on the side close to the power-supply-side bus bar 18B in the arrangement of the

terminal connection ports

10a, 10B, and 10c in the two adjacent lower rows. Therefore, the tip end side of the shaft portion 24a of each bolt 24 overlaps with a part of the terminal connection port 10a in the longitudinal direction of the block body 11.

As shown in fig. 1 and 2, among the

terminal connection ports

10a, 10B, and 10c in each row, the terminal connection port 10a closest to the power supply

side bus bars

18A and 18B has the smallest width in the direction orthogonal to the fuse arrangement direction relative to the other terminal connection ports 10B and 10 c. However, the width of the terminal connection opening 10a on the side closest to the power supply

side bus bars

18A and 18B in the direction orthogonal to the fuse arrangement direction is not necessarily the smallest, and the width in the direction orthogonal to the fuse arrangement direction is not necessarily the largest.

In the case of the present embodiment, as shown in fig. 3, the nut 25 screwed to the shaft portion 24a of the bolt 24 on the back side of the second fuse-

side bus bar

23A, 23B is held by the block body 11 so as to be slidably displaceable in the axial direction while being restricted in rotation by the block body 11. Specifically, as shown in fig. 3, a flat rotation-restricting surface 25a is formed on the outer peripheral surface of the nut 25. The block body 11 is formed with a nut accommodating hole 31, and the nut 25 is accommodated in the nut accommodating hole 31 so as to be slidably displaceable in the axial direction. A flat surface that abuts against the rotation restricting surface 25a of the nut 25 is formed on the inner peripheral surface of the nut accommodating hole 31. Further, a shaft receiving hole 30 that receives the tip end side of the shaft portion 24a of the bolt 24 is formed in the bottom of the nut receiving hole 31 of the block body 11.

The four

bus bars

18B, 21B, 22B, and 23B (18A, 21A, 22A, and 23A) are fixed by the bolts 24 and the nuts 25 as follows.

The nut 25 is accommodated in advance in the nut accommodating hole 31 on the block body 11 side, and in this state, the shaft portion 24a of the bolt 24 that has passed through the power supply side bus bar 18B (18A) is screwed to the nut 25. Then, in a state where the shaft portion 24a of the bolt 24 is screwed to the nut 25 to some extent, the remaining three

bus bars

21B, 22B, and 23B (21A, 22A, and 23A) are arranged in the gap between the nut 25 and the power source side connection piece 18A of the power source side bus bar 18B (18A). When the bolt 24 is further screwed in this state, the nut 25 is slidingly displaced inside the nut accommodating hole 31 in a state where the rotation is restricted, and the four

bus bars

18B, 21B, 22B, 23B (18A, 21A, 22A, 23A) are firmly pressed by the head of the bolt 24 and the nut 25. As a result, the four

bus bars

18B, 21B, 22B, and 23B (18A, 21A, 22A, and 23A) are electrically connected.

In the fuse mounting block 1 of the present embodiment, when the four

fuse cells

14A, 14B, 15B, and 15C are not all used, the number of

fuse cells

14A, 14B, 15A, and 15B can be appropriately reduced.

Fig. 5 is a cross-sectional view similar to fig. 3 in the case where the

fuse cells

15A and 15B are not used.

When the

fuse cells

15A and 15B are not used, the

bus bars

23A and 23B corresponding to the

fuse cells

15A and 15B are not used. In this case, the number of bus bars 18B, 21B, and 22B (18A, 21A, and 22A) fixed by the bolt 24 and the nut 25 is 3, and the displacement amount of the nut 25 when the bolt 24 is screwed in is increased.

As described above, in the fuse mounting block 1 of the present embodiment, the shaft portions 24a of the bolts 24 connecting the power source side bus bars 18A, 18B, the first fuse side bus bars 22A, 22B, and the second fuse side bus bars 23A, 23B are disposed so as to overlap with a part of the terminal connection ports 10a in the longitudinal direction of the block main body 11. Therefore, the fuse mounting block 1 of the present embodiment can shorten the length of the block body 11 in the longitudinal direction, and can reduce the size of the entire fuse mounting block 1.

In the fuse mounting block 1 of the present embodiment, on the side closest to the power supply

side bus bars

18A and 18B, a terminal connection port (terminal connection port 10a) having a width not the largest in the direction orthogonal to the fuse arrangement direction in the arrangement of the

terminal connection ports

10a, 10B, and 10c is arranged. Therefore, the shaft portion 24a of the bolt 24 can be arranged to overlap the terminal connection port 10a without separating the entire arrangement of the adjacent

terminal connection ports

10a, 10b, and 10c in the width direction. Therefore, when this configuration is adopted, the fuse mounting block 1 can be miniaturized not only in the fuse arrangement direction but also in the direction orthogonal to the fuse arrangement direction.

In the fuse mounting block 1 of the present embodiment, the fuse-

side bus bars

22A and 22B are provided separately for each of the

fuse cells

14A, 14B, 15A, and 15B, and the two fuse-

side bus bars

22A and 23A (22B and 23B) corresponding to the

adjacent fuse cells

14A and 15A (14B and 15B) are overlapped with each other and connected to the power-supply-

side bus bars

18A and 18B by the bolts 24 and the nuts 25. Therefore, the number of

fuse cells

14A, 14B, 15A, and 15B used can be easily changed depending on the application. That is, in some applications, two

fuse cells

14A and 15A (14B and 15B) may be connected to one power supply side bus bar 18A (18B), and in other applications, only one fuse cell 14A (14B) may be connected to one power supply side bus bar 18A (18B). In this case, only one fuse-side bus 22A (22B) may be connected to the power-side bus 18A (18B).

In the fuse mounting block 1 of the present embodiment, the fastening member that connects the fuse-

side bus bars

22A and 23A (22B and 23B) to the power-supply-side bus bar 18A (18B) is constituted by the bolt 24 and the nut 25. The nut 25 is held by the block body 11 so as to be slidably displaceable in the axial direction while being restricted in rotation by the block body 11. When the number of the fuse-side bus bars 22A, 22B, 23A, and 23B to be used is changed, only the amount of displacement in the axial direction of the nut 25 when the bolt 24 is screwed in is changed, and the amount of protrusion of the bolt 24 in the outer direction is not changed. Therefore, the bolt 24 can be prevented from interfering with surrounding members. In the case of this configuration, the amount of displacement of the nut 25 in the block body 11 changes depending on the number of fuse-side bus bars 22A, 22B, 23A, 23B used, and therefore the shaft portion 24a of the bolt 24 needs to have a sufficient length. However, in the fuse mounting block 1 of the present embodiment, since the shaft portion 24a of the bolt 24 is disposed so as to overlap the terminal connection port 10a of a part of the block main body 11, even if the shaft portion 24a of the bolt 24 is lengthened, it is possible to avoid an increase in size of the fuse mounting block 1.

The present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the scope of the present invention.

Claims

1. A fuse mounting block is provided with:

a block body having a plurality of terminal connection ports into which cable terminals for connecting electrical components can be fitted;

a plurality of fuse units attached to the block main body and having a plurality of fuses connected to cable terminals fitted to the terminal connection ports;

a power source side bus connected to a power source;

a fuse-side bus that connects the power-side bus to each of the fuses of the fuse unit; and

a fastening member that connects the power supply side bus bar and the fuse side bus bar,

the plurality of fuse units are mounted side by side to the block main body in such a manner that fuse arrangement directions of the fuse units are parallel to each other,

a plurality of the terminal connection ports are arranged in the block main body so as to correspond to the fuse arrangement of each fuse cell,

the shaft portion of the fastening member is disposed parallel to the fuse arrangement direction of the fuse unit,

the fuse mounting block is characterized in that,

at least a part of the shaft portion is disposed between the two rows of the terminal connection ports corresponding to the adjacent fuse cells.

2. A fuse carrier block according to claim 1,

the terminal connection port in the region overlapping the shaft portion is a terminal connection port other than the terminal connection port having the largest width in the direction orthogonal to the arrangement direction.

3. A fuse carrier block according to claim 1 or 2,

the fuse-side bus bar exists in one-to-one correspondence with the fuse unit,

the two fuse-side bus bars corresponding to the adjacent fuse units overlap each other and are connected to the power-side bus bar by the fastening member.

4. A fuse carrier block according to claim 3,

the fastening member includes: a bolt having the shaft portion; and a nut that is held by the block main body so as to be slidably displaceable in the axial direction while being restricted in rotation by the block main body.