JPH06150902A - Little child - Google Patents

Abstract

PURPOSE:To provide a terminal free from permanent deformation and a break, and allowing easy tightening with a proper force. CONSTITUTION:A stopper 30 projected toward a nut 22 at a position slightly outside the turning zone thereof is formed on the bulge section 12 of a terminal 6 for inserting a bolt. The stopper 30 is capable of coming in contact with the end of a tool 26 coupled to the nut 22, and the projection height H thereof is kept at the same level as a tool edge at the prescribed tightening position of the nut 22. As a result, the nut 22 comes off the tool 26 at the prescribed tightening position and, therefore, is free from being tightened beyond the scope of the position. The terminal 6 can be thus kept free from the permanent deformation and break due to excessive tightening.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw tightening type female terminal fitted to a male terminal, and more particularly to a female terminal tightening structure suitable for connecting a post of an automobile battery and a power supply connecting cord. .

[0002]

2. Description of the Related Art A connection cord for connecting an automobile battery and an on-vehicle electric device has a female terminal (hereinafter, simply referred to as a terminal) which is fitted with a male terminal which is a battery post.

FIG. 5 shows an example of the structure of a conventional screw tightening type terminal by press molding. The male terminal (battery post) 4 of the battery 2 is provided in the shape of a truncated cone, and the terminal 6 has an electrical contact portion 8 in which a male terminal insertion hole 8a having substantially the same shape as the male terminal 4 is formed, and a wire connecting portion. 9 and 9. One side of the electric contact portion 8 is open,
The electrical contact portion 8 has a pair of overhanging portions 12 and 14 formed of plates protruding outward from both sides of the opening 10. A bolt through hole 16 in a direction orthogonal to the axis of the male terminal insertion hole 8a is formed in each of the overhanging portions 12 and 14, and a bolt 18 inserted into the bolt through hole 16 is fitted with a washer 20 and then a nut. 22 is screwed to tighten both the overhanging portions 12 and 14. In this way, both overhangs 12, 1
4 can be tightened to reduce the terminal fitting hole 8a, and the terminal 6 can be tightened to the male terminal 4. Also, one overhanging portion 1
4, a wire connecting portion 9 is integrally formed with a caulking portion 24 for fixing the terminal 6 to the bare wire portion of the connection cord and capable of surrounding the bare wire.

In order to tighten the terminal 6 to the male terminal 4 of the battery 2, the male terminal 4 of the battery 2 is first inserted into the male terminal insertion hole 8a with the bare wire fixed to the caulking portion 24 in advance.
The terminal 6 is covered so as to be inserted into. Then, overhang 1
After the bolt 18 is inserted into the bolt through hole 16 from one side of Nos. 2 and 14, and the washer 20 is attached to the bolt 18 from the other side, the nut 22 is screwed into the bolt 18. Then
The terminal 6 is fastened and fixed to the male terminal 4 by tightening both the projecting portions 12 and 14 to reduce the male terminal insertion hole 8a.

[0005]

FIG. 6 shows a tightened state of the overhanging portions 12 and 14 by screwing the nut 22, and is a sectional view of the terminal 6 taken along the line AA in FIG. .
The terminal 6 may be formed of a material such as lead or brass that is likely to elastically deform. The terminal 6 formed of such a material may be overextended by accidentally tightening the box wrench 26 or the like. 12, 14 and male terminal insertion hole 8
The part a is permanently deformed. In order to prevent such deformation and to obtain an appropriate tightening force, the nut 22 is properly adjusted so that the gap w between the two overhanging portions 12 and 14 has an appropriate value as shown in FIG. 6 (a). It is necessary to screw up to the appropriate position and tighten the overhanging portions 12 and 14.

Then, while measuring the gap w, the nut 22
If the nut 22 is tightened, the nut 22 can be screwed to an appropriate position, but the tightening work becomes complicated. Therefore, it is better to tighten the nut 22 while visually determining the gap w without measuring the gap w accurately, but the nut 22 may be erroneously over-tightened by mistake, as shown in FIG. Both overhangs 12, as shown in
If you tighten the nut 22 until 14 is in close contact,
The overhangs 12 and 14 are surely permanently deformed. Also,
Even if the two overhang portions 12 and 14 are not in close contact with each other, permanent deformation can occur even by tightening so that the gap w is below an appropriate value.

If the terminal is permanently deformed and the bolt insertion hole 8 is eccentric as described above, it becomes difficult to release the tightening when releasing the tightening of the terminal 6 for maintenance or the like, and it can be released. However, it becomes difficult to tighten the terminal 8 again after that, and in some cases, the terminal 8 cannot be reused.
Further, in addition to the terminal 6 having the above-described configuration, there is a terminal having a resin anticorrosion cover, but similarly, the nut may be over-tightened to damage the anticorrosion cover. Furthermore, although there are terminals formed by casting lead, there is a problem in that the terminals are also permanently deformed.

Therefore, it is not easy to tighten the nut 22 to a proper position in order to securely tighten the male terminal without deforming or damaging the terminal 6 or the anticorrosion cover. An object of the present invention is to solve the above conventional problems,
An object of the present invention is to provide a terminal that can be easily tightened with an appropriate force without being permanently deformed or damaged.

[0009]

SUMMARY OF THE INVENTION The above object of the present invention is to provide a pair of overhanging portions of a male terminal insertion hole, which has an opening at a part thereof, and project outward from both sides of the opening. A bolt through hole is provided in the projecting portion, a nut is screwed into a bolt inserted in the hole, and the projecting portions are tightened by tightening the projecting portions, and the projecting portion on the bolt insertion side is The nut has a stopper slightly outwardly of the rotation region of the nut and protruding toward the nut side so as to come into contact with the tool tip fitted to the nut, and the protrusion height of the stopper is a prescribed tightening of the nut. Achieved by a terminal characterized in that the tool-side end face at a position is at a height.

Further, the above object of the present invention is to provide a pair of projecting portions of a male terminal insertion hole having an opening at a portion thereof, which project outward from both sides of the opening, and the bolt penetrates through both projecting portions. In a terminal in which a hole is provided and a bolt with a washer is inserted into the hole, and then a nut is screwed into the bolt to tighten the both protruding portions to tighten the terminal, the washer is a rotation region of the nut. It has a stopper slightly outwardly protruding toward the nut side and capable of contacting the tool engaged with the nut, and the protruding height of the stopper is the end surface on the tool side at the specified tightening position of the nut. Is achieved by a terminal which is characterized in that it is located at a height.

[0011]

When the nut is tightened, the nut moves in the axial direction and the tool follows in the axial direction so that the tool does not come off. However, after the tool contacts the stopper, the tool can rotate the nut. However, it becomes impossible to follow the movement of the nut in the axial direction. Therefore, while the nut is rotated, the nut moves in the axial direction, while the tool is restricted from moving in the axial direction by the stopper.When the nut moves to the predetermined position, the fitting with the tool is released. ,
It cannot be tightened any further. Therefore, it is possible to prevent permanent deformation or damage of the terminal due to excessive tightening.

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The present invention is not limited to the following examples, and various modifications can be made based on the technical idea of the present invention.

FIG. 1 is an exploded perspective view of a terminal of a screw tightening type obtained by press-molding a plate, a part of which is cut away. The terminal 6 is partially different from the conventional configuration shown in FIG. 5, and the same members as those in FIG. 5 are designated by the same reference numerals. In the terminal 6, one overhanging portion 1 in which an electric contact portion 8 in which a male terminal insertion hole 8a is formed and an electric wire connecting portion 9 are integrally formed
4, the caulking portion 24, the bolt through hole 16, the bolt 18, the washer 20, and the nut 22 are the same as those shown in FIG. The overhanging portion 12 on the side where the bolt 18 is inserted is integrally formed with a stopper 30 that extends under the other overhanging portion 14 toward the nut 22. Stopper 30
The nut 2 so that it does not hinder the rotation of the nut 22.
It is located outside the radius of gyration of 2. In FIG. 1, the other overhanging portions 12, 1 are shown so that the shape of the stopper 30 can be seen clearly.
4 is partially cut away. The stopper 30 prevents the nut 22 screwed into the bolt 18 from being tightened above the specified position. In order for the stopper 30 to effectively operate, it is preferable to tighten the nut 22 with the boss wrench 26 shown in the drawing.

In FIG. 2, the nut 2 is fixed by the box wrench 26
FIG. 2 is a cross-sectional view of a state in which 2 is tightened, and
It is sectional drawing of the state which cut | disconnected the terminal 6 by the B line. Figure 2
(A) shows the state during tightening, (b) shows the completion state of tightening. While screwing the nut 22 onto the bolt 18 and tightening the nut 22 with the box wrench 26, the nut 2
2 moves along the bolt 18. By the movement of the nut 22, the pair of overhanging portions 12 and 14 are tightened so that the gap w is narrowed. The box wrench 26 fitted to the nut 22 in the process of tightening the overhang portions 12 and 14.
The tip end of the contact part abuts on the stopper 30 of the overhang part 12. When the box wrench 26 contacts the stopper 30, the box wrench 26 cannot move axially with the nut 22 any more, but the nut 22 can still be rotated and tightened.

Therefore, when the nut 22 is further tightened by the box wrench 26, as shown in FIG. 2A, the box wrench 26 is restricted from moving leftward in the figure, so that only the nut 22 moves leftward. To move out of the box wrench 26. Then, when the box wrench 26 is further rotated so as to tighten the nut 22, the nut 22 is moved to the box wrench 2 as shown in FIG.
Completely escape from 6. Then, the nut 22 cannot be rotated by the box wrench 26, and the nut 22 cannot be tightened any further.

At this time, the position of the nut 22 becomes the specified tightening position, that is, the gap w between the two overhanging portions 12 and 14.
Is set to an appropriate value, the overhang parts 12, 14 and the nut 22
By appropriately setting the height H of the stopper 30 in consideration of the thickness and the like, the nut 22 is prevented from being tightened more than necessary. The height of the stopper 30 is approximately proper gap w, the thickness of the overhanging portions 12 and 14, and the washer 2
2 and the thickness of the nut 22. Both overhangs 1
The nut 2 so that the gap w between 2 and 14 is maintained at an appropriate value.
When 2 is tightened, the overhanging portions 12 and 14 of the terminal 6 and the male terminal insertion hole 8a are not permanently deformed.

According to the above construction, the fitting between the box wrench 26 and the nut 22 is released at the proper tightening position of the nut 22, and the nut 22 cannot be tightened any more. Therefore, the terminal 6 can be prevented from being deformed. To release the tightened state of the nut 22 tightened in this way, of course, it is impossible with the box wrench 26. For example, the nut 22 may be removed by rotating the nut 22 with another tool such as a spanner.

A box wrench 26 is suitable as a tool for tightening the nut 22, but the nut 22 can also be tightened with a spanner. Even if the nut 22 is tightened while the side surface of the spanner is in contact with the stopper 30, the spanner and the nut 22 move relative to each other and the engagement between the spanner and the nut 22 is released at the specified tightening position, preventing excessive tightening. You can achieve the same effect. Although the stopper 30 has an advantage that it extends below the overhanging portion 14 and does not cause any obstacle after tightening, the stopper 30 may extend over the overhanging portion 14 in the nut direction. Good.

Next, another embodiment of the present invention will be described. Although the above embodiment is the stopper 30 integrated with the terminal, the stopper 30 described below is formed integrally with the washer attached to the bolt, and can be applied to all types of terminals.

FIG. 3 is a perspective view of the terminal 6 with the anticorrosion cover. This terminal 6 has a terminal 4 for fixing a connection cord, and a resin anticorrosion cover 32 is attached to the lower part thereof.
The anticorrosion cover 32 is integrally formed with a spacer 34 having a thickness equal to an appropriate gap between the two overhanging portions 12 and 14 and rising from the bottom portion. When the anticorrosion cover 32 is attached to the terminal 6, the spacer 34 overhangs. It fits between the parts 12 and 14 to maintain an appropriate gap. Battery 2
In order to fix the terminal 6 to the male terminal 4, the nut 22 is tightened by passing the bolt 18 through the bolt through hole 16 formed in the pair of overhanging portions 12 and 14, as described above.
A bolt through hole 36 is also formed in the spacer 34 of the anticorrosion cover 32.

The bolt 18 has two washers 20, 38.
Of which the bolt head 18a and the overhanging portion 12 are attached.
A washer 38 mounted between and is formed with a stopper 40 protruding toward the nut side, and the function of this stopper 40 is the same as that of the stopper 30 shown in FIGS. 1 and 2.
The protrusion height H of the stopper 40 is the height at which the nut 22 and the box wrench are disengaged at the position where the nut 22 properly tightens the two overhanging portions 12 and 14, as described above. This height is approximately the sum of the thickness of both the overhanging portions 12 and 14, the thickness of the spacer 34, and the thickness of the nut 22.

When the nut 22 is screwed into the bolt 18 and tightened with the box wrench 26, the nut 2 is initially
Along with 2, the box wrench also moves in the tightening direction. However, after the box wrench comes into contact with the stopper 40, the nut 22 is rotated while coming out of the box wrench, and the nut 22 comes out of the box wrench at the specified position, and further tightening becomes impossible. Therefore,
The overhangs 12 and 14 are not excessively tightened,
Permanent deformation and breakage of the terminal 6 including the overhang parts 12 and 14, and further deformation of the spacer 34 between the overhang parts 12 and 14 can be prevented in advance. Also, the anticorrosion cover 3
Even if 2 does not include the spacer 34, since the proper gap is maintained between the two overhang portions 12 and 14 by proper tightening, the spacer 34 of the anticorrosion cover 32 can be omitted.

FIG. 4 is a perspective view of a terminal which is still another embodiment of the present invention, and this terminal is formed by casting. This terminal 6 also has basically the same configuration as the terminal 6, and includes an electric contact portion 8 in which a male terminal insertion hole 8a is formed, an electric wire connecting portion 9, an opening 10, a pair of overhanging portions 12 and 14, and bolt penetration. It has holes 16, bolts 18, nuts 22 and washers 38. Then, with the connection cord 42 connected, the male terminal 4 of the battery 2 is inserted into the male terminal insertion hole 8a, the bolt 18 is passed through the bolt insertion holes 16 of both overhanging portions 12 and 14, and the nut 22 is screwed. The nuts 22, the two overhanging parts 12,
14 is tightened and it is tightened to the terminal of the battery 2.

The washer 38 mounted on the bolt 18 is integrally formed with a stopper 40 protruding toward the nut 22. The protruding height H of the stopper 40 is also at a position where the nut 22 properly tightens both the overhanging portions 12 and 14.
It is a height at which the nut 22 and the box wrench are disengaged from each other, and is an appropriate gap at the time of tightening between the both overhang portions 12 and 14, the thickness of both overhang portions 12 and 14, and the nut 22 It is the sum of the thickness.

[0025]

According to the present invention, the stopper comes into contact with the tool according to the movement of the nut, and when the nut reaches a predetermined position, it is disengaged from the tool, so that the nut is not tightened more than necessary. It is tightened with an appropriate force, and therefore it is possible to prevent deformation of the terminal and damage to the terminal cover.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a terminal which is an embodiment of the present invention.

FIG. 4 is a sectional view of a tightening portion according to the present invention.

FIG. 3 is an exploded perspective view of a terminal which is another embodiment of the present invention.

FIG. 4 is an exploded perspective view of a terminal which is still another embodiment of the present invention.

FIG. 1 is an exploded perspective view of a conventional terminal.

FIG. 6 is a sectional view of a conventional tightening portion.

[Explanation of symbols]

 2 Battery 4 Male terminal 6 Terminal 8 Electrical contact part 8a Male terminal insertion hole 9 Electric wire connection part 10 Opening 12, 14 Overhang part 16 Bolt through hole 18 Bolt 20 Washer 22 Nut 24 Caulking part 26 Box wrench 30, 40 Stopper 32 Corrosion protection Cover 34 Spacer 36 Bolt through hole 38 Washer 40 Stopper 42 Connection cord

Claims (2)

[Claims] 1. A male terminal insertion hole having an opening in a part thereof is provided with a pair of projecting portions projecting outward from both sides of the opening, and bolt projecting holes are provided in both projecting portions, and the hole is provided in the hole. In the terminal in which the nut is screwed into the inserted bolt and the both protruding portions are tightened to tighten the male terminal, the protruding portion on the bolt insertion side is slightly outside the rotation area of the nut. There is a stopper that protrudes toward the nut side and can come into contact with the tool tip fitted to the nut, and the protrusion height of the stopper is the height at which the tool-side end surface is located at the specified tightening position of the nut. The terminal characterized in that. 2. A male terminal insertion hole having an opening in a part thereof is provided with a pair of overhanging parts projecting outward from both sides of the opening, bolt through holes are provided in both of the overhanging parts, and a washer is attached. After inserting the bolt into the hole, the nut is screwed into the bolt and the both overhangs are tightened to tighten the terminal, and the washer is located slightly outside the rotation region of the nut. There is a stopper that projects toward the nut side and can come into contact with a tool engaged with the nut, and the protruding height of the stopper is the height at which the tool-side end surface is located at the specified tightening position of the nut. A terminal characterized by that.