JP2011134655A - Battery terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a fixing force to a battery post from decreasing. <P>SOLUTION: A battery terminal 10 includes: an annular enclosure 11 having a cylindrical shape with edges which encloses the surrounding of battery post 90; and a pair of fastening pieces 12 which project from both ends of the enclosure 11 facing each other. The enclosure 11 is fixed to the battery post 90 by shrinking its diameter by forming a hole 17 by penetrating into the fastening pieces 12, passing a shaft part 61 of bolt 60 through the holes 17, and binding the fastening pieces 12 to the direction of approaching each other between a head part 62 of a bolt 60 and a nut 70. In one side of the fastening pieces 12 of both fastenings, a cylindrical part 29 through which the shaft part 61 of the bolt 60 penetrates is projected and formed in the circumference of the hole 17. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a battery terminal.

  Patent Document 1 discloses a conventional battery terminal. This is provided with an end-like annular surrounding portion surrounding the battery post, and a pair of flat plate-like fastening pieces projecting substantially parallel to each other from both ends of the surrounding portion. Both fastening pieces are formed with holes that pass through coaxially. Bolt shafts are passed through both holes, and nuts are screwed onto the tip of the shafts. Then, when the nut is screwed into the shaft portion, the tightening pieces are tightened in a direction approaching each other between the head portion of the bolt and the nut. With the tightening of both the fastening pieces, the diameter of the surrounding portion is reduced, and the battery terminal is fixed to the battery post.

Japanese Patent Application Laid-Open No. 8-203588

  By the way, when a tightening force by a bolt and a nut is applied to the fastening piece, the fastening piece may not be able to maintain its flatness and may be plastically deformed. As a result, the influence of the deformation of the fastening piece extends to the surrounding portion connected to the fastening piece, and the surrounding portion is also deformed. As a result, the fixing force to the battery post may be reduced.

  The present invention has been completed based on the above circumstances, and an object thereof is to prevent a reduction in fixing force with respect to a battery post.

  As means for achieving the above-mentioned object, the invention of claim 1 comprises an end-like annular surrounding portion surrounding the battery post and a pair of flat plates protruding opposite to each other from both ends of the surrounding portion. A tightening piece, a hole is formed through both the tightening pieces, a shaft portion of a bolt is passed through the both holes, and the both tightening pieces are between the bolt head and the nut. The battery terminal is fixed to the battery post by reducing the diameter of the surrounding portion by being tightened in directions approaching each other, and at least one of the tightening pieces includes a cylindrical portion Is characterized in that it is formed to protrude around the hole.

  The invention of claim 2 is characterized in that, in the invention of claim 1, the shaft portion of the bolt is inserted through the cylindrical portion.

  According to a third aspect of the present invention, in the first or second aspect, the cylindrical portion is formed to protrude from the one fastening piece to the other fastening piece, and the both fastening pieces are fastened. The state is characterized in that the protruding end of the cylindrical portion is in contact with the other fastening piece.

  According to a fourth aspect of the present invention, in the one according to any one of the first to third aspects, the fastening piece is folded back from an edge thereof, and the head of the bolt or It is characterized in that a bent piece with which the nut abuts is formed.

  The invention of claim 5 is characterized in that, in the invention of claim 4, the bent piece is formed by dividing four or more pieces in the circumferential direction of the fastening piece.

<Invention of Claim 1>
Since at least one of the fastening pieces has a cylindrical portion protruding around the hole, when the fastening piece receives a tightening force by a bolt and a nut, the stress is applied to the cylindrical portion. By acting more on the side, the flatness of the clamping piece can be maintained. Therefore, it is possible to avoid plastic deformation of the fastening piece and thus the surrounding portion, and secure a good fixing force to the battery post.

<Invention of Claim 2>
Since the shaft portion of the bolt is inserted through the cylinder portion, the shaft center of the shaft portion is prevented from shaking during tightening.

<Invention of Claim 3>
When both tightening pieces are tightened, the projecting end of the cylindrical portion comes into contact with the other tightening piece, so that the tightening operation from the contact position is restricted, and excessive tightening to both tightening pieces is avoided.

<Invention of Claim 4>
Since the fastening piece is formed with a bent piece that is folded back from the edge thereof so that the bolt head or nut contacts the outer peripheral surface of the folded piece, the bolt and the nut are tightly screwed by the spring back of the bent piece. The bolts and nuts are prevented from loosening. In this case, since a washer is unnecessary, the number of parts is reduced.

<Invention of Claim 5>
Since the bent piece is divided into four or more in the circumferential direction, the springback acting direction of the bent piece is distributed substantially evenly in the circumferential direction of the bolt head or nut, and the bolt and nut are loosened. More reliably prevented.

It is a top view of the battery terminal which concerns on Embodiment 1 of this invention. It is a side view of a battery terminal. It is a front view of a battery terminal. It is an expansion perspective view of the fastening piece which has a cylinder part. It is a side view of the battery terminal before fastening. It is a front view of the battery terminal before fastening. It is a side view of the battery terminal after clamping. It is a front view of the battery terminal after clamping. It is a top view of the battery terminal which concerns on a reference example. It is a side view of a battery terminal. It is a front view of a battery terminal.

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. The battery terminal 10 according to the first embodiment is integrally formed by bending a metal plate material punched into a predetermined shape by a press and connected to the battery post 90 as shown in FIGS. 1 and 2. 11 and a pair of fastening pieces 12 for fastening and fixing the surrounding portion 11 to the battery post 90. Here, the battery post 90 is formed in a tapered cylindrical shape whose diameter gradually decreases toward the upper end side.

  The surrounding portion 11 is formed so as to surround the outer periphery of the battery post 90, and has a diameter that gradually decreases toward the upper end side at substantially the same taper angle as the battery post 90, and has an end with a predetermined width in the circumferential direction opened. It has an annular shape. The surrounding portion 11 can be deformed in a reduced diameter, and is arranged in a loosely fitted state on the battery post 90 in a state before the diameter reduction.

  A barrel portion 13 is formed on the rear end side (opposite the open end) of the surrounding portion 11. The barrel portion 13 includes a ceiling portion 14 that is bent and extended rearward from the upper end of the surrounding portion 11, and a pair of crimping pieces 15 that protrude downward from both side edges of the ceiling portion 14. As shown in FIG. 5, the barrel portion 13 is connected to the electric wire 80 by caulking both the crimping pieces 15 to the core wire 81 of the electric wire 80.

  Both fastening pieces 12 have a pair of opposing pieces 16A, 16B that are opposed to each other from the open end that is the front end of the surrounding portion 11 and that extend radially outward. As shown in FIG. 3, the opposing pieces 16 </ b> A and 16 </ b> B are parallel to each other and arranged obliquely with respect to the vertical direction (height direction) and the width direction (left-right direction). Of the opposing pieces 16A and 16B, the opposing piece (hereinafter referred to as the upper opposing piece 16A) positioned relatively above is formed with a hole 17 penetrating slightly above the center of the upper opposing piece 16A. Similarly, a hole 17 is formed through the opposed piece (hereinafter referred to as the lower opposed piece 16B) positioned relatively below, slightly below the center of the lower opposed piece 16B. Both holes 17 are configured to communicate coaxially in a direction perpendicular to the plate surfaces of both opposing pieces 16A and 16B. Then, a shaft portion 61 of a bolt 60 such as a hexagonal bolt is inserted through the holes 17 of the opposing pieces 16A and 16B from below.

  Here, the shaft portion 61 of the bolt 60 is passed through both holes 17, a nut 70 such as a hexagonal nut is fitted to the tip of the shaft portion 61, and the nut 70 is screwed into the shaft portion 61, whereby the head portion of the bolt 60. The fastening pieces 12 are fastened between the nut 62 and the nut 70 so as to approach each other, and the surrounding portion 11 is gradually reduced in diameter and fixed to the battery post 90 accordingly.

  On the front edge and the upper edge of the lower facing piece 16B, ribs 18 extend along the front edge and the upper edge in a direction substantially perpendicular to the plate surface of the lower facing piece 16B and from the upper facing piece 16A. It is formed by bending away. A rib 19 is bent along the lower edge of the lower opposing piece 16B in a direction substantially perpendicular to the plate surface of the lower opposing piece 16B and toward the upper opposing piece 16A. Is formed.

  On the other hand, bent pieces 21 are formed on the upper and lower edges of the upper facing piece 16A so as to be folded back along the upper and lower edges to the opposite side of the lower facing piece 16B. In detail, the bent piece 21 is substantially parallel to the plate surface of the upper facing piece 16A connected to the bent end of the bent portion 22 and the substantially U-shaped turning portion 22 connected to the upper and lower edges of the upper facing piece 16A. The extending ends of the upper and lower receiving portions 23 face each other across the horizontal slit 24 at the same height as the center of the hole 17 of the upper facing piece 16A. Yes. Further, the bent piece 21 is equally divided in the front and rear sides with a vertical slit 25 formed at the upper edge and the lower center in the front-rear direction of the upper facing piece 16A. It is divided into four in the direction. In the central portion of each of the folded pieces 21 divided into four, a substantially four semicircular arc shape, which is aligned with the hole 17 of the upper facing piece 16A, is formed by cutting out a circular recess 26 as a whole. A shaft 61 of the bolt 60 can be inserted into the recess 26. Each bent piece 21 has a bending space 27 between the receiving portion 23 and the upper facing piece 16A, and can be elastically deformed toward the bending space 27 with the bent portion 22 as a fulcrum. Yes.

  As shown in FIG. 4, a cylindrical tube portion 29 is formed to protrude around the hole 17 on the lower surface of the upper facing piece 16 </ b> A that faces the lower facing piece 16 </ b> B. The cylindrical portion 29 surrounds the entire periphery of the hole 17 on the lower surface of the upper facing piece 16A and protrudes in a direction substantially perpendicular to the lower surface of the upper facing piece 16A, and is coaxial with the hole 17. Through-holes 28 communicating with each other. The protruding end surface of the cylindrical portion 29 is an annular flat surface 29A substantially parallel to the lower surface of the upper facing piece 16A. As shown in FIG. 6, the protruding amount of the cylindrical portion 29 is suppressed to less than half of the separation distance between the opposing pieces 16 </ b> A and 16 </ b> B before being tightened by the bolt 60 and the nut 70. The amount is almost the same. The cylindrical portion 29 is formed by, for example, burring by a press.

The structure of the battery terminal 10 according to the first embodiment is as described above. Next, the operation of the battery terminal 10 will be described.
First, the shaft portion 61 of the bolt 60 is passed through the hole 17 of the fastening pieces 12 and the through-hole 28 of the cylindrical portion 29 from below, and the nut 70 is loosely screwed into the distal end side of the shaft portion 61 protruding upward from the recess 26 (see FIG. 5 and FIG. 6). At this time, the head portion 62 of the bolt 60 is seated obliquely from below with respect to the lower facing piece 16B. Further, the nut 70 is seated obliquely from above with respect to the bent piece 21 and abuts against the outer side surface of the bent piece 21 in a face-to-face manner. Then, the surrounding portion 11 is fitted into the battery post 90 in a loosely fitted state.

  In the above state, the nut 70 is screwed into the shaft portion 61 of the bolt 60 using an impact wrench or the like. Then, the tightening pieces 12 approach each other, the surrounding portion 11 gradually decreases in diameter, and the surrounding portion 11 comes into contact with the outer peripheral surface of the battery post 90 in a close contact state (see FIGS. 7 and 8). . With this screwing, there is a concern that the upper facing piece 16A receives the tightening force of the bolt 60 and the nut 70, and the flatness thereof cannot be maintained. Therefore, the planarity of the upper facing piece 16A is maintained. Further, the shaft portion 61 of the bolt 60 is fitted and inserted into the cylindrical portion 29, so that the shaft center of the bolt 60 is prevented from being shaken along with screwing. Further, the head 62 of the bolt 60 abuts against the rib 18, thereby preventing the bolt 60 from rotating along with screwing.

  When both the fastening pieces 12 are normally tightened in this way, the protruding end of the cylindrical portion 29 comes into contact with the tip of the rib 19 and further tightening of the both fastening pieces 12 is restricted. Thereby, the surrounding part 11 is fixed to the battery post 90 with an appropriate tightening force. At this time, the nut 70 is in elastic contact with the bent piece 21 and is tightly screwed to the shaft portion 61 of the bolt 60 by the spring back of the bent piece 21.

  As described above, according to the first embodiment, the cylindrical portion 29 through which the shaft portion 61 of the bolt 60 passes is formed in the upper facing piece 16A of the fastening piece 12 so as to protrude around the hole 17 of the upper facing piece 16A. Therefore, when the upper facing piece 16A receives a tightening force by the bolt 60 and the nut 70, the stress is deflected and acts on the cylindrical portion 29 side, thereby improving the flatness of the upper facing piece 16A. Can keep. As a result, the upper facing piece 16A and thus the surrounding portion 11 connected to the upper facing piece 16A are prevented from being plastically deformed, and a good clamping and fixing force for the battery post 90 is ensured.

  Further, when both the fastening pieces 12 are tightened, the protruding end of the cylindrical portion 29 comes into contact with the lower fastening piece 12, so that the tightening operation from the contact position is restricted, and Over tightening is avoided.

  In addition, since the bolt 60 and the nut 70 are tightly tightened by the springback of the bent piece 21, the bolt 60 and the nut 70 are prevented from loosening. In this case, since a washer is unnecessary, the number of parts is reduced. Further, since the bent piece 21 is formed by dividing the bent piece into four parts in the circumferential direction, the spring back acting direction of the bent piece 21 is substantially evenly distributed in the circumferential direction of the nut 70, and the bolt 60 and the nut 70 are loosened. Is more reliably prevented.

<Reference example>
9 to 11 show a battery terminal 10A according to a reference example. The battery terminal 10A is not formed with the cylindrical portion 29 in the first embodiment, and the form of the upper fastening piece 12 is different from that in the first embodiment. Since others are the same as those in the first embodiment, the same reference numerals are given to the same components as those in the first embodiment, and a duplicate description will be omitted.

  On the front edge, upper edge, and lower edge of the upper facing piece 16A, bent pieces 21A, 21B, and 21C are provided along the front edge, upper edge, and lower edge to the opposite side of the lower facing piece 16B. It is folded and formed. Specifically, the bent pieces 21A, 21B, and 21C21 are opposed to the upper side of the bent portion of the curved portion 22 and the substantially U-shaped curved portion 22 that continues to the front edge, the upper edge, and the lower edge of the upper facing piece 16A. Receiving part 23 arranged substantially parallel to the plate surface of piece 16A, upper bent piece 21A by folding from the upper edge, front bent piece 21B by folding from the front edge, and folding from the lower edge The lower bent piece 21C. The upper bent piece 21A is connected to the substantially second half portion of the upper edge of the upper facing piece 16A, and the front bent piece 21B is connected to the substantially upper half portion of the front edge of the upper facing piece 16A, and the lower bent piece. 21C is connected over the entire length of the lower edge of the upper facing piece 16A.

  The side end (front end) in the extending direction of the upper bent piece 21A and the extension end (rear end) of the front bent piece 21B sandwich a vertical slit 25A formed at the center in the front-rear direction of the upper facing piece 16A. They are placed facing each other. The extending end (lower end) of the upper bent piece 21A and the side edge (lower end) in the extending direction of the front bent piece 21B and the extending end (upper end) of the lower bent piece 21C are the same as those of the upper facing piece 16A. The horizontal slits 24 </ b> A having substantially the same height as the center of the hole 17 are sandwiched and arranged facing each other. A substantially semicircular arc-shaped recess 26A is cut out at the front corner of the extending end of the upper bent piece 21A and the lower corner of the extending end of the front bent piece 21B. In addition, a substantially semicircular arc-shaped concave portion 26B is cut out and formed at the center in the front-rear direction of the extending end of the lower bent piece 21C. These concave portions 26A, 26B are configured to open in a circular shape as a whole of the bent pieces 21A, 21B, 21C, and the shaft portion 61 of the bolt 60 can be inserted therein.

  In addition, a rib 31 along the upper edge of the substantially upper half of the upper edge of the upper facing piece 16A extends in a direction substantially perpendicular to the plate surface of the upper facing piece 16A and toward the lower facing piece 16B. It is formed by bending toward it. When the bolt 60 and the nut 70 are properly tightened, the rib 31 comes into contact with the lower facing piece 16B, and the rib 19 on the lower facing piece 16B comes into contact with the upper facing piece 16A. Twelve or more tightening operations are regulated. In this case, the rib 31 and the upper bent piece 21A are separated from each other across the longitudinal slit 25 at the center in the front-rear direction of the upper end of the upper facing piece 16A.

  Further, the seating surface of the nut 70 is in contact with the outer surface of the folded pieces 21A, 21B, 21C. A bending space 27 </ b> A is held between the receiving portion 23 and the upper facing piece 16 </ b> A, and each bending piece 21 </ b> A, 21 </ b> B, 21 </ b> C receives the turning portion 22 when receiving a tightening force from the nut 70. It is elastically deformed as a fulcrum and tilts the receiving portion 23 toward the bending space 27A. According to the second embodiment, as in the first embodiment, the bolt 60 and the nut 70 are tightly tightened by the springback of the bent pieces 21A, 21B, and 21C, so that the bolt 60 and the nut 70 are prevented from loosening. In addition, since a dedicated washer is not required, the number of parts can be reduced.

<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 cylindrical portion may be formed around the hole in the upper surface of the upper facing piece, the upper surface and the lower surface of the lower facing piece. Further, the cylindrical portion may be formed over two or more of the upper and lower surfaces of the upper facing piece and the upper and lower surfaces of the lower facing piece. In this case, the cylindrical portion may be fitted into the head of the bolt, or the nut may be fitted inside or outside.
(2) The cylindrical portion may be partially cut off in the circumferential direction.
(3) Five or more bent pieces may be divided and formed in the circumferential direction of the fastening piece.
(4) The bent piece may be in contact with the head of the bolt.

DESCRIPTION OF SYMBOLS 10 ... Battery terminal 11 ... Surrounding part 12 ... Fastening piece 17 ... Hole 21 ... Bending piece 29 ... Cylindrical part 60 ... Bolt 61 ... Shaft part 62 ... Head 70 ... Nut 90 ... Battery post

Claims (5)

An endless annular enclosure surrounding the battery post;
A pair of flat plate-shaped fastening pieces projecting opposite to each other from both ends of the surrounding portion,
A hole is formed through both the fastening pieces, a shaft portion of a bolt is passed through the both holes, and the fastening pieces are fastened in a direction approaching each other between a head portion of the bolt and a nut. By this, the surrounding portion is reduced in diameter, is a battery terminal fixed to the battery post,
The battery terminal according to claim 1, wherein at least one of the fastening pieces has a cylindrical portion protruding around the hole.   The battery terminal according to claim 1, wherein a shaft portion of the bolt is inserted through the cylindrical portion.   The cylindrical portion is formed so as to protrude from the one fastening piece to the other fastening piece, and in a state where both the fastening pieces are fastened, the protruding end of the tubular portion contacts the other fastening piece. The battery terminal according to claim 1, which contacts the battery terminal.   4. The fastening piece is formed with a bent piece which is folded back from an edge thereof and is brought into contact with a head of the bolt or the nut on an outer side surface of the folded piece. The battery terminal according to any one of the above.   The battery terminal according to claim 4, wherein the bent piece is divided into four or more in the circumferential direction of the fastening piece.

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