JP2013008588A - Battery terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably prevent looseness of a bolt and a nut.SOLUTION: In a battery terminal 10, a nut 90 is abutted to an outside face of a first projection part 13 via a washer 60, and is fastened to a shaft part 81 of a bolt 80 penetrating through the washer 60 and both of projection parts 13, 14. Thereby, both of the projection parts 13, 14 become close to each other, and a diameter of a fastening part 12 is reduced, and the fastening part 12 is fixed to a battery post 50. The washer 60 has such a shape that a flat plate material is bent, and is held between the first projection part 13 and the nut 90 during fastening, and therefore, it is elastically enlarged while giving a spring force to both of the first projection part and the nut. A contact-stop part that can contact an end of the washer 60 in an enlarging direction during fastening is provided on the outside face of the first projection part 13.

Description

  The present invention relates to a battery terminal.

  Patent Document 1 discloses a conventional battery terminal. This is made of a conductive metal plate material, and includes an arcuate tightening portion that surrounds the battery post and a pair of projecting portions that project from both ends of the tightening portion to face each other. Through-holes are formed coaxially in both protrusions. A nut is applied to the outer surface of one of the two protrusions, and the nuts are tightened to the shafts of the bolts inserted into the two through holes so that the two protrusions approach each other and tighten accordingly. The part is reduced in diameter and fixed to the battery post.

JP 2010-33783 A

  Incidentally, in the conventional battery terminal, a washer can be interposed between the nut and the protruding portion in order to prevent loosening of the bolt and nut. In this case, for example, if the washer has a shape that bends into a mountain-shaped cross section, and the washer is sandwiched between the nut and the projecting portion, the elastic reaction force of the washer can be further increased. The effect of preventing loosening can be more reliably exhibited. However, in this case, if the washer is expanded to a flat state between the nut and the protrusion, the elastic reaction force of the washer is reduced, and the effect of preventing the loosening may not be sustained.

  The present invention has been completed based on the above situation, and an object thereof is to reliably prevent loosening of bolts and nuts.

  As means for achieving the above-mentioned object, the invention of claim 1 is made of a conductive metal plate material, and an arcuate fastening portion that surrounds the battery post and protrudes from both ends of the fastening portion so as to face each other. A pair of protrusions and a washer disposed in contact with the outer surface of at least one of the protrusions, and a nut or bolt sandwiching the washer outside the one protrusion. The nut is fastened to the shaft of the bolt that passes through the washer and both protrusions, and the protrusions approach each other and the tightening part is reduced in diameter. A battery terminal fixed to the battery post, wherein the washer is formed of a plate material bent through a bent portion, and the one protrusion Between the nut and the bolt or the head of the nut or the bolt so that the spring is applied to both of them and elastically expanded. This is characterized in that a stopper portion capable of abutting in the expanding direction of the end portion is provided.

  According to a second aspect of the present invention, in the first aspect of the present invention, the washer has a rectangular shape in plan view and bends in a cross-sectional mountain shape, and the stopper portion contacts the end portions of both hems of the washer. It is characterized by being provided in pairs as possible.

  The invention of claim 3 is characterized in that, in the invention of claim 1 or 2, a gap is provided between the end of the washer and the stopper portion before the tightening. .

<Invention of Claim 1>
When the nut is fastened to the bolt, the washer is clamped in an expanded state between the one protrusion and the nut or the head of the bolt, so that loosening of the bolt and nut is prevented. In this case, since the end portion of the washer abuts against the stopper portion in the expanding direction, further expanding operation of the washer is restricted, so that it is possible to prevent the spring force of the washer from decreasing, and consequently It is prevented that the effect of the locking is reduced.

<Invention of Claim 2>
Since the washer has a rectangular shape in plan view and bends in a cross-sectional shape, and the stoppers are provided in pairs so as to be in contact with the ends of both hems of the washer, The spring force of the washer acts on the nut or bolt head in a well-balanced manner. As a result, the smoothness of the tightening operation by the nut is ensured.

<Invention of Claim 3>
In the state before tightening, since a gap is formed between the end of the washer and the stopper portion, it is possible to avoid a sudden increase in operating force at the initial stage of tightening.

It is a top view before the fastening of the battery terminal which concerns on Embodiment 1 of this invention. It is a front view before the battery terminal is tightened. It is a top view after the battery terminal is tightened. It is a front view after the battery terminal is tightened. It is a top view of a washer.

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. The battery terminal 10 according to the present embodiment is made of a conductive metal plate material, and includes a terminal body 11 and a washer 60. Further, a bolt 80 and a nut 90 are attached to the battery terminal 10. The bolt 80 is a hexagonal bolt, and the nut 90 is a hexagonal nut.

  The terminal body 11 is integrally formed by bending a metal plate material, and is attached to a battery post 50 and an electric wire connection portion (not shown) to which an electric wire (not shown) is connected as shown in FIG. It consists of a tightening part 12 and a pair of protrusions 13 and 14 through which a bolt 80 is mounted. As shown in FIG. 2, the battery post 50 has a truncated cone shape protruding from the upper surface of the battery body 100.

  As shown in FIG. 1, the tightening portion 12 has a shape that turns in an arc shape so as to surround the battery post 50, and has a truncated cone shape corresponding to the battery post 50 as shown in FIG. 4. The tightening portion 12 can be deformed in a reduced diameter, and is fixed to the battery post 50 by being reduced in diameter from the state in which it is loosely fitted to the battery post 50 as shown in FIGS. 1 and 3.

  Both projecting portions 13 and 14 are in the form of a flat plate projecting opposite to each other from both ends (both ends opening edges) of the tightening portion 12 in the circumferential direction. Both projecting portions 13 and 14 are formed integrally with the tightening portion 12. For this reason, when both projecting portions 13 and 14 approach each other, the tightening portion 12 is deformed in a reduced diameter. In the case of this embodiment, both protrusions 13 and 14 are disposed substantially along the vertical direction.

  Further, as shown in FIG. 2, through holes 15 are formed in both protruding portions 13 and 14 so as to penetrate coaxially in the plate thickness direction. A shaft portion 81 of a bolt 80 is inserted into the through hole 15 from the left side in the drawing. And the through-hole 15 is made into the form opened circularly in both the protrusion parts 13 and 14, and has the opening diameter corresponding to the axial part 81 of the volt | bolt 80. FIG.

  As shown in FIG. 2, one of the protrusions 13 and 14 has a washer 60 on the outer surface (the surface opposite to the surface (opposite surface) where the protrusions 13 and 14 face each other). The first protrusion 13 to which the nut 90 is applied via the second protrusion 14 is the second protrusion 14 to which the head 82 of the bolt 80 is applied on the outer surface. As shown in FIGS. 2 and 4, when the nut 90 is fastened to the shaft portion 81 of the bolt 80 that penetrates both the protruding portions 13, 14 and the washer 60, the nut 90 and the head 82 are pressed against each other. The second protrusions 13 and 14 are adapted to approach each other.

  As shown in FIG. 2, a first stopper 16 that protrudes toward the inner surface (opposing surface) of the second protrusion 14 is formed at the lower end of the first protrusion 13. A second stopper 17 that protrudes toward the inner side surface (opposing surface) of the first protrusion 13 is formed at the upper end of the second protrusion 14. The first and second stoppers 16 and 17 have a shape in which a protruding piece portion standing at the protruding end portion of the first and second protruding portions 13 and 14 is bent inward at a substantially right angle. When both protrusions 13 and 14 try to approach too much, the first stopper 16 comes into contact with the opposing surface (inner surface) of the second protrusion 14 and the second stopper 17 opposes the first protrusion 13. It abuts against the surface (inner surface) and further overtightening is restricted.

  As shown in FIG. 1 and FIG. 2, a pair of first stoppers 21 that protrude outward are formed at the upper and lower ends of the first protrusion 13, as viewed away from the second protrusion 14. A pair of second stoppers 22 that protrude outward are formed on the upper and lower ends of the second protrusion 14 so as to be away from the first protrusion 13. The first and second contact stoppers 21 and 22 are formed by bending the protruding piece portions standing at the protruding direction base ends of the first and second protrusions 13 and 14 outward at substantially right angles, and It is made into the shape extended while bending across the both ends of the clamping part 12 from the protrusion direction base end part of the 1st, 2nd protrusion parts 13 and 14. As shown in FIG. Further, the first and second stoppers 21 and 22 are substantially symmetrical with respect to each other at an intermediate position.

  Here, as shown in FIG. 2, in a state where the washer 60 is in contact with the outer surface of the first projecting portion 13, both end portions of the washer 60 are arranged to face the pair of upper and lower first stoppers 21. . On the other hand, in a state where the head portion 82 of the bolt 80 is in contact with the outer surface of the second projecting portion 14, the end surface of the head portion 82 is disposed to face the pair of upper and lower second stopper portions 22. A gap is provided between the first and second stoppers 21 and 22 and the first and second stoppers 16 and 17.

  Next, the washer 60 will be described. The washer 60 is made of a flat plate made of metal, and has a rectangular shape in plan view, specifically, a square shape in plan view, as shown in FIG. A through hole 61 into which the shaft portion 81 of the bolt 80 is inserted is formed in the central portion of the washer 60. The through hole 61 is configured to open in a circular shape in the washer 60, and is disposed in communication with the through hole 15 when the washer 60 is attached to the outer surface of the first projecting portion 13.

  A bent portion 62 extending along the width direction is formed at the central portion of the washer 60 in the vertical direction. As shown in FIG. 2, the washer 60 has a mountain-shaped cross section in which the upper half and the lower half are inclined with respect to the vertical direction with the bent portion 62 as the top. The washer 60 has a natural state (see FIG. 2) that maintains its bent shape, and an expanded state (see FIG. 4) in which the bent portion 62 is pressed and becomes a substantially flat shape along the height direction. The elastic member can be elastically deformed with the bent portion 62 as a boundary. In the natural state, the upper and lower ends of the washer 60 are arranged with a gap between the pair of upper and lower first stoppers 21, and in the expanded state, the upper and lower ends of the washer 60 are a pair of upper and lower first pairs. It will be in the state contact | abutted with the stopper part 21. FIG.

Next, the operation of the battery terminal 10 according to the present embodiment will be described.
When the battery terminal 10 is assembled, the washer 60 is applied to the outer surface of the first projecting portion 13, and in this state, the shaft portion 81 of the bolt 80 penetrates the through hole 15 and the through hole 61 from the second projecting portion 14 side. Be made. Then, as shown in FIGS. 1 and 2, a nut 90 is screwed into the tip end portion of the shaft portion 81 of the bolt 80. At this time, the washer 60 is in a natural state and is kept in a non-contact state with the first stopper portion 21, and the first and second projecting portions 13 and 14 extend from the proximal end side to the distal end side (projecting end side). ) To expand each other. Then, the tightening portion 12 is fitted on the battery post 50.

  Subsequently, the nut 90 is rotated around the shaft portion 81 of the bolt 80. As the rotation of the nut 90 proceeds, the first projecting portion 13 is pressed by the nut 90 and displaced toward the second projecting portion 14 side, and the second projecting portion 14 is pressed by the head portion 82 of the bolt 80 and the first projecting portion. Displacement toward the part 13 side. Thus, the first and second projecting portions 13 and 14 approach each other, and the tightening portion 12 is deformed in a reduced diameter. At this time, the head 82 is prevented from being rotated around the nut 90 by contacting the second stopper 22.

  Further, when the nut 90 is tightened to the shaft portion 81 of the bolt 80, the bent portion 62 is pressed by the nut 90 and the washer 60 is expanded, and the washer 60 is elastic between the nut 90 and the first projecting portion 13. Can be pinched. When the nut 90 further rotates, the upper and lower ends of the washer 60 come into contact with the pair of upper and lower first stoppers 21 from the inside, and the further expansion operation of the washer 60 is stopped. As shown in FIGS. 3 and 4, when the first and second projecting portions 13 and 14 reach a position where they are arranged substantially in parallel, the fastening portion 12 is appropriately reduced in diameter to the outer peripheral surface of the battery post. It is made to adhere to. Thereby, the battery terminal 10 is fixed in a state where the battery post 50 is connected to be conductive.

  As described above, in the state where the battery terminal 10 is fixed to the battery post 50, the washer 60 is elastically deformed in an expanded state between the nut 90 and the first protruding portion 13, but both upper and lower ends of the washer 60. Is held by the pair of upper and lower first holding portions 21, a large elastic reaction force (spring force) acts on the nut 90 and the first protruding portion 13 from the washer 60. Accordingly, the washer 60 is in close contact with the nut 90 and the first protrusion 13, and the nut 90 is firmly screwed to the shaft portion 81 of the bolt 80.

  As described above, according to the present embodiment, when the nut 90 is fastened to the bolt 80, the washer 60 is sandwiched between the first protruding portion 13 and the nut 90 in an expanded state. Looseness is prevented. In this case, since the end portion of the washer 60 contacts the first stopper 21 in the expanding direction, further expansion operation of the washer 60 is restricted, so that the elastic reaction force of the washer 60 is reduced. This prevents the locking effect from diminishing.

  In addition, the washer 60 has a rectangular shape in plan view and is bent in a mountain shape in cross section, and the first stopper 21 is provided in a pair so as to be in contact with both ends of the washer 60. Therefore, the elastic reaction force of the washer 60 acts on the first protrusion 13 and the nut 90 in a well-balanced manner. As a result, the smoothness of the tightening operation by the nut 90 is ensured. Moreover, since there is a gap between the end of the washer 60 and the first stopper 21 in the state before tightening, it is possible to avoid a sudden increase in operating force at the initial stage of tightening.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) The washer may be elastically sandwiched between the head of the bolt and the second protrusion. Also in this case, the washer may be elastically sandwiched between the nut and the first protrusion.
(2) The first and second protrusions may be arranged obliquely with respect to the vertical direction.
(3) The bent portion may be formed along the height direction, and the washer can be expanded in the width direction via the bent portion.
(4) The first contact stopper may be formed over the entire length of the first protrusion in the protrusion direction.

DESCRIPTION OF SYMBOLS 10 ... Battery terminal 12 ... Fastening part 13 ... 1st protrusion part (one protrusion part)
14 ... 2nd protrusion (the other protrusion)
15 ... Through hole 21 ... First stopper part (stopper part)
60 ... Washer 61 ... Through hole 62 ... Bent part 80 ... Bolt 81 ... Shaft part 82 ... Head 90 ... Nut

Claims (3)

Made of conductive metal plate material,
An arc-shaped fastening part surrounding the battery post;
A pair of projecting portions projecting opposite to each other from both ends of the tightening portion;
A washer disposed in contact with the outer surface of at least one of the two protrusions;
A nut or a bolt head is applied to the outside of the one projecting portion with the washer interposed therebetween, and the nut is fastened to a shaft portion of the bolt that penetrates the washer and the both projecting portions. Both projecting parts approach each other, the fastening part is a battery terminal that is reduced in diameter and fixed to the battery post,
The washer is made of a plate material that is bent through a bent portion, and is clamped between the one projecting portion and the head of the nut or bolt while being tightened, thereby applying a spring force to both. Elastically expanded,
The battery terminal according to claim 1, wherein an outer surface of the one projecting portion is provided with a stopper portion capable of coming into contact with an end portion of the washer in the expanding direction during the tightening.   The washer has a rectangular shape in plan view and is bent in a mountain shape in cross section, and the stopper is provided in a pair so as to be in contact with the ends of both hems of the washer. The battery terminal according to claim 1.   3. The battery terminal according to claim 1, wherein a gap is formed between an end of the washer and the stopper portion before the tightening. 4.

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