JP3023822B2 - Terminal fittings for battery electrodes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal fitting for connecting a wiring to a battery electrode, and more particularly, to fixing a terminal fitting to a battery electrode around an axis of the electrode with a bolt. The present invention relates to a battery electrode terminal fitting improved so as not to rotate easily.

[0002]

2. Description of the Related Art Conventionally, terminal fittings 10 as shown in FIG. 5 have been used to connect wiring to electrodes of a battery mounted on a vehicle or the like. That is, the terminal fittings 10 connected to the electrodes 2 of the battery 1 are opposed to each other by extending a substantially cylindrical portion 11 externally fitted to the electrode 2 toward the outside in the radial direction of the axis of the cylindrical portion 11. It has a pair of protruding parts 12 and 13 and a wiring fixing part 14 for gripping and fixing the wiring 3 extended from the tip of one protruding part 12. Then, a bolt 16 is inserted into a through hole 15 that passes through the protruding portions 12 and 13 in the horizontal direction, and a nut 17 screwed to the tip of the bolt 16 is tightened using an impact wrench 18, so that a terminal fitting is provided. 1
0 is held on the electrode 2 of the battery 1. However,
In the terminal fitting 10 shown in FIG. 5, since the bolt 16 is attached in the horizontal direction, when the terminal fitting 10 is held on the electrode 2 of the battery 1, the impact wrench 18 It interferes with surrounding parts and the body of the vehicle, and is extremely ill.

Accordingly, the applicant of the present invention has previously filed an application for a battery electrode terminal fitting 20 as shown in FIGS. 6 and 7 (see Japanese Utility Model Application Laid-Open No. 62-12264). The battery electrode terminal fitting 20 includes a substantially cylindrical portion 21 fitted externally to the electrode 2 of the battery 1, and a cylindrical portion 2.
1 includes a pair of protruding portions 22 and 23 extending from the first protruding portion 22 toward the outside in the radial direction of the axis C, and a wiring fixing portion 24 extending from one protruding portion 23 and fixing the wiring 3. And the protruding portions 22 and 23
Has a taper that tapers upward and a caulking plate 25 having the same taper angle is fitted from above. Then, by tightening a fastening bolt 26 which penetrates the caulking plate 25 and which is screwed to a fixed plate 26 which is in contact with the lower ends of the protruding portions 22 and 23, the protruding portions 22 and 23 are fixed on the axis C. Are urged so as to approach each other in the circumferential direction, whereby the cylindrical portion 21 is held by the electrode 2. That is,
In this battery electrode terminal fitting 20, the bolt 2
When tightening 6, the impact wrench can act from above the battery 1, so that it does not interfere with other components provided around the battery 1.

[0004] In addition, FIG.
In the battery electrode terminal fitting 30 disclosed in Japanese Patent Laid-Open No. H10-205, a pair of fastening parts 32 having a U-shaped cross section and fitting with each other from a substantially cylindrical portion 31 externally fitted to the electrode 2 of the battery 1. 33 project from the cylindrical member 31 in the tangential direction. Then, after a bolt 34 penetrating in parallel with the axis C of the electrode 2 is passed through through holes (not shown) provided in the tightening portions 32 and 33, which are eccentric to each other, a nut (not shown) is screwed into the tip of the bolt 34. Then, the eccentricity of the through hole is corrected by a taper portion (not shown) provided on the bolt 34, and as a result, the tightened portions 32 and 33 are fixed to the axis C of the electrode 2.
Are made to approach each other in the circumferential direction, and the cylindrical portion 31 is held by the electrode 2. Therefore, also in the battery electrode terminal fitting 30, the impact wrench can act from above the battery 1 when the bolt 34 is tightened, so that the impact wrench interferes with other components provided around the battery 1. Nothing to do.

[0005] Further, in the battery electrode terminal fitting 40 shown in FIG. 9, which was previously filed by the applicant of the present invention and disclosed in Japanese Utility Model Publication No. 4-7567, the battery 1
A pair of flanges 42 and 43 opposed to each other are erected on a substantially cylindrical portion 41 externally fitted to the electrode 2 so as to extend at an angle φ with respect to the axis C of the electrode 2. A bolt 44 is inserted into the through holes provided in the holes 42 and 43 so that the head 44a thereof is on the lower side, and a nut 45 is screwed into the tip of the bolt 44. Thus, also in the battery electrode terminal fitting 40, the axis S of the bolt 44 extends obliquely upward in the drawing, and the impact wrench 46 can act from obliquely above the battery 1 when the nut 45 is tightened. Battery 1 because it is possible
Does not interfere with other components provided around the device.

[0006]

However, in the battery electrode terminal fitting 20 shown in FIGS. 6 and 7, and in the battery electrode terminal fitting 30 shown in FIG. When the tightening torque TS is applied to tighten the bolts 27 and 34, the battery electrode terminal fittings 20 and 40 themselves rotate in the rotational direction of the tightening torque TS, as shown in FIG. In response to the force A in the same direction as above, a so-called co-rotation phenomenon occurs. As a result, the wiring 3 may not be fixed in a predetermined direction, or the electrode 2 may be damaged due to repeated tightening operations.

Further, in the terminal fitting 40 shown in FIG. 9, when the tightening bolt 44 is tightened, the cylindrical portion 41 is tightened in the direction inclined with respect to the axis C of the electrode 2 and held on the electrode 2. As a result, not only may the terminal fitting 40 itself be deformed due to excessive force, but also the cylindrical portion 41 of the terminal fitting 40 may be urged to rotate around the axis S of the tightening bolt 44. As a result, the electrode 2 is held in a state of one-side contact with the electrode 2, and there is a possibility that the surface of the soft electrode 2 made of lead may be dented and damaged.

The present invention has been made in view of the above-mentioned problems, and a fastening tool such as an impact wrench for fastening a bolt when fixing a terminal fitting to an electrode of a battery is used for parts around the battery. To provide a battery electrode terminal fitting which not only does not cause interference but also does not easily rotate together when fastening a bolt, and is not deformed by a bolt tightening operation and does not damage a battery electrode. With the goal.

[0009]

SUMMARY OF THE INVENTION The object of the present invention is to provide a substantially cylindrical electrode gripping portion fitted to an electrode of a battery, a wiring fixing portion extending from the electrode gripping portion, A pair of protruding portions that are erected on the outer peripheral surface and urge the electrode gripping portions to be held on the electrodes when approached to each other in the circumferential direction of the axis of the electrode gripping portions, Engaging means for engaging with the protruding portion, and screwing with the engaging means so that when tightened, the engaging means causes the pair of protruding portions to approach in the circumferential direction of the axis of the electrode grip portion. battery electrodes Ru and a fastening bolt for biasing
In the terminal fitting for the present invention, the projecting portion is an axis of the bolt.
And the axis of the electrode gripping portion includes the axis of the electrode gripping portion
The tip is a predetermined length so that they intersect in the plane
And the engaging means is cross-sectionally
U-shape, upper end and lower part of the bent portion of the pair of protrusions
The present invention can be achieved by a battery electrode terminal fitting that is engaged so as to pinch each of the ends .

[0010]

When the tightening bolt is tightened, the engaging means brings the pair of projections close to each other in the circumferential direction of the axis of the electrode gripping portion, and embraces the electrode gripping portion on the battery electrode. A metal fitting can be attached to the battery electrode. Since the axis of the tightening bolt is inclined with respect to the axis of the battery electrode in a plane including the axis of the battery electrode, the tightening torque applied to the tightening bolt exerts a torque (distribution) around the axis of the battery electrode. Torque) is reduced to the value obtained by multiplying the value of the tightening torque by the value of the cosine of the angle formed between the axis of the tightening bolt and the axis of the battery electrode, and is generated by tightening the tightening bolt. Co-rotation around the axis can be suppressed. In addition, since the engaging means is urged by tightening the tightening bolt so as to bring the pair of protrusions closer to each other in the circumferential direction of the axis of the electrode gripping portion, deformation of the fitting itself due to tightening of the tightening bolt is also prevented. Disappears. Furthermore, since the tightening tool can be introduced from above the battery when tightening the tightening bolt, the tightening work can be performed without interfering with parts around the battery, and workability is improved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a terminal fitting for a battery electrode according to the present invention will be described in detail below with reference to the drawings. However, the present invention is not limited to this embodiment, and can be appropriately modified. Here, FIG. 1 is a perspective view of one embodiment of a battery electrode terminal fitting according to the present invention, FIG. 2 is a side view of the battery electrode terminal fitting shown in FIG. 1, and FIG. 3 is a battery electrode terminal shown in FIG. FIG. 4 is a view for explaining the operation of the fastening means of the battery electrode terminal fitting shown in FIG. 1, and is a view taken in the direction of arrows IV-IV in FIG. 2.

As shown in FIGS. 1 to 3, the battery electrode terminal fitting according to the present embodiment includes a cylindrical portion 51 as an electrode gripping portion which is externally fitted to the electrode 2 of the battery 1. An extended wire fixing portion 52, protruding portions 53 and 54 erected on the outer peripheral surface of the tubular portion 51, and an engaging member 55 that engages the pair of protruding portions 53 and 54.
56 and a tightening bolt 57 to be screwed to the engaging members 55.

As shown in FIGS. 1 to 3, the cylindrical portion 51 has a shape conforming to the external shape of the electrode 2 of the battery 1, and in the present embodiment, has a tapered shape which becomes thinner upward. Moreover, it is formed in a cylindrical shape having a substantially C-shaped cross section. From one end thereof, a wiring fixing portion 52 for gripping and fixing the terminal of the wiring is integrally extended. Further, the cylindrical portion 51 has a part of a side surface cut out in the direction of the axis C, and a pair of plate-like projecting portions 53 and 54 are directed radially outward of the cylindrical portion 51 continuously to the notch. It is erected. Further, as shown,
The portions 53 and 54 are formed by the axis S of the tightening bolt 57 and the cylindrical portion.
The axis C of the minute 51 intersects in the plane including the axis C
The tip is bent over a predetermined length.
You. Then, as shown in FIG. 4, the projections 53 and 54 are arranged to face each other so as to become narrower upward.

As shown in FIG. 4, the projecting portions 53.5
Engagement members 55 and 56 having a U-shaped cross section are engaged with the upper end and the lower end of
3 and 54 are locked so as not to be separated from each other in the circumferential direction of the axis C. The pair of flanges 55b of the engagement member 55 are tapered to face each other so as to be in close contact with the outer side surfaces of the protruding portions 53 and 54. Further, a fastening bolt 57 is inserted through a through hole provided in a central portion 55 a of the engagement member 55 via a washer 58. The distal end of the tightening bolt 57 is screwed into a female screw portion provided at the central portion 56a of the engaging member 56. By tightening the tightening bolt 57, the engaging members 55 and 56 approach each other. It is configured as follows. Therefore, as shown in FIGS. 4A, 4B, and 4C, when the tightening bolt 57 is gradually tightened, the engaging members 55 and 56 come closer to each other, and the pair of projecting portions 53 are formed.
Since the circumferential interval L of the axis C of 54 is gradually reduced, the cylindrical portion 51 can be brought into close contact with the outer peripheral surface of the electrode 2 of the battery 1 by tightening the tightening bolt 57. In this embodiment, the wire fixing portion 52 and the projecting portions 53 and 54 are cylindrical portions 51.
Are arranged so as to face each other on a straight line, but the arrangement positions of these two members are not particularly limited, and they can be arranged at an arbitrary angle on the circumference of the cylindrical portion 51. .

On the other hand, as shown in FIGS. 1 and 2, the axis S of the tightening bolt 57 and the axis C of the battery electrode 2 intersect with each other at an intersection angle θ (intersection A) in a plane including the axis C. Are arranged as follows. Note that the intersection angle θ
Can be set arbitrarily according to the design. Therefore, as shown in FIG. 1, the distribution torque TC of the tightening torque TS applied to the tightening bolt 57 around the axis C of the battery electrode 2 is obtained by adding the cosine (c) of the intersection angle θ to the value of the tightening torque TS.
os θ °), which is reduced by about 70% when θ = 45 ° and about half when θ = 60 °. As described above, in the battery electrode terminal fitting 50 of the present embodiment, the electrode 2 generated when the fastening bolt 57 is tightened is formed.
Is reduced so that the terminal fitting 5 extends in a predetermined direction.
0 can be fixed to the electrode 2.

[0016]

In the battery electrode terminal fitting of the present invention, the axis of the tightening bolt for fastening the terminal fitting to the battery electrode crosses the axis of the battery electrode in a plane including the axis of the battery electrode. As a result, the distribution of the tightening torque applied to the tightening bolt around the axis of the battery electrode is reduced by the angle between the axis of the tightening bolt and the axis of the battery electrode. Thereby, when the fastening bolt is tightened to attach the battery electrode terminal fitting of the present invention to the battery electrode, the force of co-rotation around the axis of the battery electrode can be reduced, so that this terminal can be easily formed. The metal fitting can be pressed down, thereby preventing damage to the battery electrode and fixing the wiring connected to the electrode in a predetermined direction. As a result, the direction in which the wiring extends with the terminal fittings rotating as in the past is not determined, and there is no need to repeat the work of attaching the terminal fittings. This improves the work efficiency of attaching the terminal fittings to the battery electrode. Can be done. In addition, since the engaging means is urged by tightening the tightening bolt so as to bring the pair of protrusions closer to each other in the circumferential direction of the axis of the electrode gripping portion, deformation of the fitting itself due to tightening of the tightening bolt is also prevented. Disappears. Furthermore, since the tightening tool can be introduced from above the battery when tightening the tightening bolt, the tightening work can be performed without interfering with parts around the battery, and workability is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of one embodiment of a battery electrode terminal fitting according to the present invention.

FIG. 2 is a side view of the battery electrode terminal fitting shown in FIG.

FIG. 3 is a plan view of the battery electrode terminal fitting shown in FIG. 1;

FIG. 4 is a view for explaining the operation of the fastening means of the battery electrode terminal fitting shown in FIG. 1;
It is an IV arrow view.

FIG. 5 is a perspective view illustrating a mounting structure of a conventional battery electrode terminal fitting.

FIG. 6 is a perspective view of a conventional battery electrode terminal fitting.

FIG. 7 is a plan view of the battery electrode terminal fitting shown in FIG. 6;

FIG. 8 is a perspective view of a conventional battery electrode terminal fitting.

FIG. 9 is a perspective view of a conventional battery electrode terminal fitting.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Battery 2 Electrode 3 Wiring 10 Battery electrode terminal fitting 11 Cylindrical part 12, 13 Projection part 14 Wiring connection part 16 Tightening bolt 17 Nut 20 Battery electrode terminal fitting 21 Cylindrical part 22, 23 Projection part 24 Wiring connection part 25 Caulking Plate 26 Fixing plate 27 Tightening bolt 30 Battery electrode terminal fitting 31 Cylindrical part 32, 33 Projecting part 34 Tightening bolt 35 Wiring fixing part 40 Battery electrode terminal fitting 41 Tubular part 42, 43 Projecting part 44 Tightening bolt 45 Nut REFERENCE SIGNS LIST 50 battery electrode terminal fitting 51 tubular part 52 wiring fixing part 53 projecting part 54 projecting part 55, 56 engaging member 57 fastening bolt 58 washer C electrode axis S axis of fastening bolt θ axis crossing angle of axis TS bolt tightening Torque TC Terminal bracket rotation torque

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) H01M 2/20-2/34 H01R 11/00-11/32

Claims (1)

(57) [Claims] An electrode grip portion having a substantially cylindrical shape externally fitted to an electrode of a battery; a wiring fixing portion extending from the electrode grip portion; A pair of projections for urging the electrode gripping portions to be held by the electrode when the electrode gripping portions are brought close to each other in a circumferential direction of the axis of the electrode gripping portion, and an engagement means for engaging with the pair of projections And a tightening bolt which is screwed into the engaging means, and which, when tightened, urges the pair of protrusions so as to approach the pair of protrusions in the circumferential direction of the axis of the electrode gripping part. in includes Ru battery electrode terminal fitting, said protrusion, the axis of the electrode gripping portion and the axis of the bolt
Line intersects in the plane containing the axis of the electrode gripper
So that its tip is bent over a predetermined length.
And the engaging means has a U-shaped cross section,
Hold the upper and lower ends of the bent part of the protrusion
A terminal fitting for a battery electrode, wherein the terminal fitting is engaged with the battery.