JPH1092484A - Fixing structure for connection terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the fixing structure for a connection terminal, which can make bolt fixing operations efficient, and prevent a bolt from falling of when the connection terminal is fixed to electrical equipment by bolts and nuts. SOLUTION: In the fixing structure 1 for a connection terminal, nuts 11a and 11b are fixed to a part of the electrical equipment, fuse terminals 4a and 4b of a fusible link 4 is positioned in such a way as to be laid along the threadedly engaging surfaces of the nuts 11a and 11b, concurrently the connection terminals 6a and 6b connected to a bus bar 7 and electrical wires 5a and 5b are also positioned, and when the connection terminals 6a and 6b and the like are to be fixed to the fuse terminals 4a and 4b, bolts 8a and 8b holding a tool 9 is guided by guide parts 12a and 12b which are so formed as to be communicated with the fixing positions of the nuts 11a and 11b, and the bolts are fastened to the nuts 11a and 11b integrally with the connection terminals 6a and 6b so as to be fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection terminal fixing structure for fixing various connection terminals by bolts, and more particularly to a fusible link box mounted on an automobile and a fuse mounted on an electric connection box. It is suitable for use when electrically connecting a bull link, a bus bar, and a crimp terminal to which an electric wire is connected.

[0002]

2. Description of the Related Art Today's automobiles are increasingly automated, and accordingly, various electronic devices for driving control, electric connection boxes, fusible link boxes and the like are mounted. The fusible link box includes a fuse holder for mounting the fusible link, and is configured to connect a bus bar or a wire harness to a connection terminal of the fusible link mounted on the fuse holder with a bolt. Hereinafter, as an example of a conventional fusible link box, an outline of “fixed structure of fusible link box” disclosed in Japanese Utility Model Laid-Open No. 1-98458 will be described.

As shown in FIG. 14, a fusible link box (hereinafter simply referred to as a box) 34 has a power supply terminal 33 connected and fixed to a battery press terminal (not shown). A connection plate 43 protruding to the outside from the side wall 34b of the box 34 is integrally provided on the power-supply-side terminal plate 37 to be conductive. A stay 44 is provided outside of electrical components such as an electric connection box, and a connection plate 43 and a connection terminal 45 of the alternator connection wire 40 are connected to the stay 44 by a bolt 46 and a nut 4.
7. Tighten and fix.

[0004] A connection plate 43 formed by integrally bending the lower end edge of the power supply connection plate 37 is provided with a bolt insertion hole 43a. The connection between the fusible link 36 in the box 34 and the power-supply-side terminal plate 37 or the load-side terminal 38 is fastened and fixed with a bolt 39, and a fastening fitting 48 is used for this. The fastening fitting 48 is connected to the substrate section 4.
A screw cylinder 48b is provided upright on 8a. When fixing the fusible link 36, the power supply side terminal plate 37, the load side terminal 38, and the like, the substrate portion 48a is set facing the central partition wall formed in the box 34. As a result, the connection terminal 36a of the usable link 36 is positioned outside the screw tube 48b, and the insertion hole 36b communicates with the screw tube 48b. In this state, if the connection terminal 36b of the fuse break link 36 and the load-side terminal 38 are tightened to the screw cylinder 48b with the bolt 39, the terminals can be securely fixed without being damaged.

[0005]

However, in the structure of the box 34, when the bolt 39 is tightened,
There were the following problems. That is, when tightening the bolt 39, the bolt 39 is held by a tool such as a wrench, then moved to the tightening position, and then the nut 39 is positioned and then tightened. On the other hand, the box 34, the electric connection box, and the like are mounted in an engine room or a console box of an automobile. In such a working environment, the longer the distance to the tightening position, the more difficult it is to align the bolt to the tightening position, and the greater the possibility of falling off the wrench.

If the distance to the tightening position is long, it is necessary to use a long tool such as a wrench. In this case, a rotation blur peculiar to the long tool tends to occur, and this blur hinders the tightening operation. Furthermore,
With the conventional structure, when performing the tightening work, tighten the hole of the connection terminal with one hand, align it with the hole on the mating side, and hold it.
The other hand has to be tightened by operating a tool such as a wrench, which is inconvenient because workability is not good and both hands are completely closed.

An object of the present invention is to provide a connection terminal fixing structure which can improve the workability when fixing various connection terminals with bolts and nuts and can prevent the bolts and the like from falling off.

[0008]

The above objects of the present invention can be solved by the connection terminal fixing structures described in 1) to 3) below. 1) A nut provided on a part of an electric device, a fusible link in which a fuse terminal is in contact with a bolt threaded surface of the nut when the nut is mounted on the electric device, and a fusible link extending along the fuse terminal from outside the electric device. A fixing structure for a connection terminal, comprising: a connection terminal to be inserted; and a guide portion for guiding a bolt to be screwed to the nut from one end of the electric device toward a bolt screw surface of the nut. 2) An insertion port for inserting the connection terminal is provided near the screwing surface of the nut, and a locking portion for temporarily locking the connection terminal is provided at one end of the insertion port. The fixing structure for a connection terminal according to claim 1. 3) The connection terminal fixing structure according to claim 1, wherein a side surface that prevents rotation of the connection terminal when the bolt is tightened is provided in the insertion port.

According to the connection terminal fixing structure having the above structure,
A nut was fixed to a part of an electric device such as an electric junction box or a fusible link box, and the fuse terminal of the fusible link was positioned along the screwing surface of the nut, and further connected to a bus bar or an electric wire. The connection terminals and the like are positioned. Since the electric device is formed with a guide portion having a U-shaped cross section so as to communicate with the fixing position of the nut, when fixing the connection terminal, hold the bolt with a tool such as a wrench. It can be moved to the fixing position of the nut along the guide portion and fastened to the nut together with the connection terminal. Therefore, even if the distance to the tightening position of the bolt is long, since the guide is guided by the guide portion, there is no need to search for the tightening position, and the fixing operation can be performed efficiently. Further, even if the bolt falls off from the tool, the bolt stops inside the guide portion, and the trouble of searching for the bolt is not required. In addition, even if the tool becomes long, there is no rotational shake at the time of tightening, and the fixing can be performed accurately and easily.

[0010] Further, a locking portion for temporarily locking the connection terminal at a predetermined position is provided at an insertion port for inserting the connection terminal into a fixing position of the nut. For this reason, the positioning of the connection terminal is performed accurately, and fastening errors are eliminated. Further, a side surface for preventing rotation of the crimp terminal due to torque at the time of bolt rotation is formed in the insertion port. Therefore, even if the bolt is rotated at the time of tightening and fixing, the electric wire connected to the connection terminal is not pulled or entangled. In addition, work such as pinching to prevent rotation of the connection terminal is not required.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a connection terminal fixing structure (hereinafter simply referred to as a fixing structure) to which the present invention is applied will be described in detail with reference to FIGS. FIG. 1 is a perspective view showing a configuration of an electric junction box to which a fixing structure is applied, FIG. 2 is a partially cutaway perspective view showing the relationship between the internal configuration of the electric junction box and each member, and FIG. FIG. 4 is an enlarged perspective view of a main part showing the mounting of crimp terminals, FIG. 5 is a cross-sectional view of a main part showing the mounting of each connection terminal, and FIG. FIG. 7 is an enlarged perspective view of a main part showing the locking of the crimp terminal, FIG. 8 is a cross-sectional view of the main part showing the locking of the crimp terminal, and FIG. FIG. 10 is a partially cutaway perspective view showing a fixing operation of the terminal, FIG. 10 is a partially cutaway perspective view showing bolting of each connection terminal, and FIG.
FIG. 1 is a side view of a main part showing a guide action at the time of bolt tightening, and FIG.
2 is a partially cutaway perspective view showing a fixed state of each connection terminal, FIG.
FIG. 3 is a cross-sectional view of a main part showing a rotation preventing action of the connection terminal. In the description of the embodiment, first, the configuration of an electric connection box to which a fixing structure is applied will be described, and then the fixing operation of members such as connection terminals will be described. The electric connection box corresponds to the electric device in the present invention, but the electric device also includes the fusible link box described in the conventional example.

The fixing structure 1 according to the present embodiment is applied to an electric junction box 2 mounted on an automobile. A fusible link holder (hereinafter, simply referred to as a holder) 3 is provided on an upper surface of the electric connection box 2, and a fusible link (hereinafter, simply referred to as F / L) 4 is detachably attached to the holder 3. It is designed to be attached. F
/ L4 is a pair of fuse terminals 4a,
4b, and the fuse terminals 4a and 4
A fuse element (not shown) is formed between b.

On the other hand, connection terminals 6a and 6b connected to the electric wires 5a and 5b are inserted into the lower surface inside the electric connection box 2. The connection terminal 6a is fixed to the fuse terminal 4a together with the bus bar 7 provided in the electric connection box 2 by a bolt 8a. Also, the crimp terminal 6b
Are fixed to the fuse terminal 4b by bolts 8b. When the connection terminals, that is, the connection terminal 6a and the bus bar 7 are fixed to each other by the bolts 8a and 8b by the bolts 8a and 8b, and when the fuse terminal 4b is fixed to the connection terminal 6b, an impact wrench (hereinafter, referred to as an impact wrench) is used. The bolts 8a and 8b are held by a wrench 9 and screwed to the nuts 11a and 11b. At this time, guide portions 12a and 12b are formed toward the tightening position in order to guide the wrench 9 to the screwing position and prevent the bolts 8a and 8b from falling off. In the present embodiment, the guide portions 12a,
12b is formed so as to correspond to one fusible link holder 3, but is not limited to this, and the formation position and the number can be changed as necessary.

Next, an insertion structure of the connection terminals 6a and 6b will be described. As shown by arrows A1 and A2 in FIG. 3, the connection terminals 6a and 6b are inserted into insertion holes 16a and 16b communicating with the guide portions 12a and 12b from an opening 15 formed in a lower portion of the electric connection box 2. Has become. First, the structure of the insertion port 16a will be described. As shown in FIGS. 3 to 5, the insertion port 16a is connected to the guide portion 1 through an opening 15 formed in a lower portion of the electric connection box 2.
It is formed so as to communicate with 2a. A tapered guide surface 17a is formed on a side surface of the insertion port 16a, that is, a side surface facing the bus bar 7, and a step-shaped locking portion 17b is formed on an upper portion of the guide surface 17a.

Referring to the lateral shape of the insertion port 16a, a side surface 18 is formed on the side wall surface as shown in FIG. 4, and its width dimension is set so that the crimp terminal 6a can be easily inserted. . Further, as shown in FIG. 5, the insertion port 16b has no guide surface or step, and the crimp terminal 6b is directly inserted into the vicinity of the fuse terminal 4b of the F / L 4.

As shown in FIG. 5, a partition plate 19 is formed substantially at the center of the lower portion of the holder 3, and nut embedding portions 21a and 21b are formed on both sides thereof. Then, the nut 11a (see FIG. 2) is fixed to the nut embedding portion 21a by embedding, and the nut embedding portion 21 is fixed.
The nut 11b is fixed to the b by embedding. Therefore, the nuts 11a and 11b are insulated by the partition plate 19, and cannot be rotated when tightened by the bolts 8a and 8b, so that the connection terminals can be easily and securely tightened and fixed.

Next, the operation of assembling each member to the electric connection box 2 and the function of fixing the terminals will be described. As shown in FIGS. 2 to 4, the F / L 4 is inserted into the holder 3 from above the holder 3. Then, the fuse terminal 4a of the F / L 4 is positioned along the screwing surface of the nut 11a, and the fuse terminal 4b is positioned along the screwing surface of the nut 11b. As shown in FIG. 2, the fuse terminals 4a, 4b
Are formed with U-shaped notches 22a and 22b, and the F / L
4 are notches 22a, 22
b communicates with the screw holes of the nuts 11a and 11b. Particularly, on the fuse terminal 4a side, the insertion hole 7a of the bus bar 7 provided in advance also communicates with the notch 22a and the screw hole of the nut 11a.

Next, the operation of fixing the connection terminals 6a and 6b will be described. First, the connection terminal 6a is indicated by an arrow A1 in FIG.
As shown by, it is inserted from the opening 15 into the insertion port 16a. That is, as shown in FIG.
a, the connection portion 23a of the connection terminal 6a is inserted at first, and the large-diameter bulk 24 to which the electric wire 5 is fastened and fixed is inserted as shown in FIG.
Hangs on the lower end of 6a.

From this state, the bulk 24
Is in contact with the tapered surface 17a, so that the entire connection terminal 6a moves upward while elastically contacting the bus bar 7 on the opposite surface. Then, as shown in FIGS. 6 to 8, when the lower end of the bulk 24 is hooked on the locking portion 17b, the bulk 24 is locked. At this time, it can be recognized by a click feeling that the connection terminal 6a has been properly inserted, and since the connection terminal 6a is temporarily held, it is possible to prevent the connection terminal 6a from falling off.

On the other hand, the connection terminal 6b is inserted from the opening 15 into the insertion port 16b as shown by an arrow A2 in FIG. Then, it is positioned at a position along the fuse terminal 4b of the F / L 4 previously mounted. Since the width of the insertion port 16b is set in the same manner as the insertion port 16a, the connection portion 23b of the connection terminal 6b is positioned so as to be along the fuse terminal 4b. Therefore, as shown in FIG. 9, both connection terminals 6a and 6b are positioned along the fuse terminals 4a and 4b, and then the bolts 8
The operation shifts to the fixing operation by a, 8b, that is, the tightening operation.

As shown in FIG. 2, the wrench 9 is provided with bolt holding portions 25a and 25b at its ends, and when performing the fixing work, as shown in FIG.
Bolts 8a and 8b are fitted and held in 5a and 25b.
Next, as shown by arrows B1 and B2 in FIG.
The bolts 8a and 8b are screwed into the nuts 11a and 11b by rotating the wrench 9 as shown in FIG.

Guide portions 12a and 12b in the above process
The relationship between the wrench 9 and the guide portion 12a will be further described. As shown in FIG. 11, the inner diameter R1 of the guide portion 12a
Is set in accordance with the diameter R2 of the wrench 9, and a gap G is provided between the two. Therefore, the wrench 9 moves so as to slide along the guide portion 12a, and
The bolt 8a can reach the nut 11a as shown in FIG. Even if the bolt 8a might fall off from the wrench 9 during the tightening operation, the guide portion 12
Since the bolt 8a is received on the electrical junction box 2, the bolt 8a does not fall from the electrical junction box 2. Therefore, in the present embodiment, the positioning of the bolts 8a, 8b and the nuts 11a, 11b can be performed without visual confirmation.
It is possible to reliably prevent inconvenience that the a and 8b fall out of the wrench 9 and fall into, for example, the engine room. That is, workability in fixing the connection terminal is improved, and an accident due to dropping of the bolts 8a, 8b can be prevented.

As described above, the bolts 8a and 8b and the nut 1
After tightening the screws 1a and 11b, the wrench 9 is
a, 8b. As a result, as shown in FIG. 12, the fuse terminal 4a, the bus bar 7, and the connection terminal 6a
Are fixed and electrically connected. Also,
Similarly, fixing and electrical connection are performed for the fuse terminal 4b and the connection terminal 6b, and the assembly of the electrical connection box 2 is completed. By the way, conventionally, when the screws are tightened by the bolts 8a and 8b, the connection terminals 6a and 6b usually rotate in the screw tightening direction. And connection terminals 6a,
Although the turning operation of the wrench 9 has to be performed while holding down 6b, the complicated work as described above is not required in the present embodiment.

That is, as shown in FIG. 13, the insertion opening 16a will be described. Side surfaces 18 are formed on both sides in the horizontal direction. Therefore, when tightening the bolt 8a, even if the connection terminal 6a rotates, the left side surface 1
8 and cannot rotate. When the bolt 8a is loosened, the connection terminal 6a comes into contact with the right side surface 18 and cannot rotate. Therefore, when performing the screw tightening operation, the pressing operation of the connection terminal 6a becomes unnecessary, and the screw tightening operation can be easily performed with one hand. Furthermore, twisting of the electric wire 5a due to rotation of the connection terminal 6a does not occur.

In the present embodiment, the lengths of the guide portions 12a and 12b are set according to the size of the electric connection box 2, the position of the holder 3, and the like. Becomes effective. Further, since the inner diameters of the guide portions 12a and 12b are set in accordance with the size of the tool, that is, the wrench 9, as described above, erroneous selection such as erroneous wrench 9 can be prevented.

[0026]

As described above, in the connection terminal fixing structure according to the present invention, the nut provided on a part of the electric device and the fuse terminal contact with the bolt screwing surface of the nut when mounted on the electric device. A fusible link, a connection terminal inserted from the outside of the electric device along the fuse terminal, and a guide portion for guiding a bolt screwed to the nut from one end of the electric device toward a bolt screwing surface of the nut. ing. Therefore, even if the distance to the tightening position of the bolt is long, since the guide is guided by the guide portion, there is no need to search for the tightening position, and the work of fixing each connection terminal can be performed efficiently. Further, even if the bolt is dropped from the tool, the bolt stops in the guide portion, so that it is not necessary to search for the bolt or the like, and it is possible to prevent the bolt from dropping from the electric device. In addition, even if the tool becomes long, there is no rotational shake at the time of tightening, and the bolt can be tightened accurately and easily.

An insertion port for inserting the connection terminal is provided near the screwing surface of the nut, and a locking portion for temporarily locking the connection terminal is provided at one end of the insertion port. Further, the insertion port is provided with a side surface that prevents rotation of the connection terminal when the bolt is tightened. Therefore, even if the bolt is turned at the time of tightening and fixing, the wire connected to the connection terminal is not pulled or entangled, and work such as pinching to prevent the rotation of the connection terminal is unnecessary. Become.

[Brief description of the drawings]

FIG. 1 is a perspective view of an electric connection box showing an embodiment of a connection terminal fixing structure to which the present invention is applied.

FIG. 2 is an exploded perspective view showing a relation among members constituting the electric connection box in FIG.

FIG. 3 is a partially cutaway perspective view showing a configuration of an electric connection box and insertion of connection terminals in FIG. 2;

FIG. 4 is an enlarged perspective view of a main part showing insertion of connection terminals in FIG. 3;

FIG. 5 is a sectional view of a main part showing insertion of connection terminals in FIG. 3;

FIG. 6 is a perspective view showing locking of a connection terminal in FIG. 2;

FIG. 7 is an enlarged perspective view of a main part showing insertion of a connection terminal in FIG. 6;

FIG. 8 is a cross-sectional view of a main part showing locking of a connection terminal in FIG. 6;

FIG. 9 is a perspective view showing a guide operation of the bolt in FIG. 6;

FIG. 10 is a perspective view showing a bolt tightening operation in FIG. 9;

FIG. 11 is a side view of a main part showing a relationship between a guide part and a tool in FIG. 10;

FIG. 12 is a perspective view showing a completed connection state of connection terminals in FIG. 10;

FIG. 13 is a cross-sectional view of a main part showing a rotation preventing action of the connection terminal in FIG. 10;

FIG. 14 is an exploded perspective view showing a configuration of a conventional fusible link.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Connection terminal fixing structure 2 Electric connection box 3 Fusible link holder 4 Fusible link 4a, 4b Fuse terminal 5a, 5b Electric wire 6a, 6b Connection terminal 7 Bus bar 8a, 8b Bolt 9 Impact wrench 11a, 11b Nut 12a, 12b Guide Part 15 Opening 16a, 16b Insertion port 17a Tapered surface 17b Locking part 21a, 21b Nut embedding part 24 Bulk

Claims (3)

[Claims] 1. A nut provided in a part of an electric device, a fusible link in which a fuse terminal is in contact with a bolt threaded surface of the nut when the nut is attached to the electric device, and a fusible link from outside the electric device to the fuse terminal. Fixing the connection terminal, comprising: a connection terminal that is inserted along the connection portion; and a guide portion that guides a bolt that is screwed to the nut from one end of the electric device toward a bolt screw surface of the nut. Construction. 2. An insertion port for inserting the connection terminal is provided near a screwing surface of the nut, and a locking portion for temporarily locking the connection terminal is provided at one end of the insertion port. The fixing structure for a connection terminal according to claim 1, wherein: 3. The connection terminal fixing structure according to claim 1, wherein a side surface for preventing rotation of the connection terminal when the bolt is tightened is provided in the insertion port.