JP3265983B2 - Battery terminal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery terminal for tightening and connecting an annular electric contact portion to a battery post by tightening a screw member by operating a lever.

[0002]

2. Description of the Related Art FIG. 11 shows a conventional battery terminal. The battery terminal 41 protrudes from both sides of a terminal body 44 having a tapered annular electric connection portion 43 fitted to a battery post (taper terminal) 42 and a cut portion (side opening) 45 of the electric connection portion 43. A shaft pin 47 penetrating the extended bearing portions 46 and 46 ′, and is rotatably supported by the shaft pin 47,
And a cam lever 50 having a cam portion 48 that can be pressed into contact with the cam lever 50.

[0003] The cam portion 48 has a locking surface 51 orthogonal to the lever portion 49. An electric wire connecting portion 52 is formed to extend from one of the bearing portions 46 '. A power supply line 53 (FIG. 12) is crimp-connected to the electric wire connection portion 52, and a battery post (battery) 42 and the power supply line 52 are connected via the battery terminal 41.

FIG. 12 shows a method of connecting the battery terminal 41. In this method, first, FIG.
With the cam lever 50 upright as shown in FIG.
Is engaged with the battery post 42. Next, FIG.
12 (d), the battery post 42 is sandwiched between the electric connection portion 43 and the cam portion 48, and finally, the locking surface 51 of the cam portion 48 as shown in FIG. Is abutted and locked to the battery post 42. This allows
The battery terminal 41 is clamped and fixed to the battery post 42.

[0005]

However, in the above-mentioned conventional battery terminal 41, as shown in FIG. 13, the relationship between the amount of displacement of the cam lever 50 and the operating force (that is, the fixing force) is shown in the middle of the lever displacement. In order to generate an unnecessary lock peak at the position (d) in FIG.
However, there is a problem in that the operating force of 0 is high and the workability is poor.
This is the fixed position dimension L ₁ of the cam portion 48 shown in FIG.
Nothing else in because there is a large rock peak dimension L ₂ than. The lever positions shown in FIGS.
~ E.

SUMMARY OF THE INVENTION In view of the above, the present invention provides a battery terminal which can be connected to a battery post by lever operation, and can be operated easily and securely connected to the battery post. With the goal.

[0007]

In order to achieve the above-mentioned object, the present invention provides a pair of tightening portions projecting from a substantially annular electric connection portion, and a nut is screwed onto a bolt penetrating the tightening portion. A first structure in which a multi-threaded screw is formed in the bolt and a lever is integrally formed in the nut in the battery terminal for tightening the electric connection portion. Further, in a battery terminal in which a pair of tightening portions are formed so as to protrude from the substantially annular electric connection portion, and the pair of tightening portions are brought close to each other by rotating a lever to tighten the electric connection portion, the pair of tightening portions are provided. And a second structure in which a screw shaft of a left and right reverse screw is screwed to the nut, and an end of the lever is fixed to the screw shaft. A multi-start thread having a right-left reverse screw may be formed on the screw shaft.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 3 show a first embodiment of a battery terminal according to the present invention. As shown in FIG. 1, the battery terminal 1 has a tapered annular electric connection portion 3 fitted to the battery post 2, and a fastening protruding and extending from both sides of a cut portion (side opening) 4 of the electric connection portion 3. (Terminals) 5, 5 'and a metal terminal body 7 composed of an electric wire connecting part (crimping part) 6 extended from one of the tightening parts 5'. A bolt (male screw member) 12 which is supported by the fastening portions 5 and 5 'through the shaft hole 8 of 5' and has a multi-threaded screw 10 formed on the surface of the shaft portion 9.
And a lever 14 integrally having a nut portion 13 of a multi-thread screw to be screwed to the bolt 12.

The shaft hole 8 is formed to have a slightly larger diameter than the outer diameter of the bolt 12 so that the bolt shaft 9 can be inserted. The bolt head 11 is directed outwardly above and below the fastening portion 5 '. It is engaged with the protruding flange portion 19 and is fixed so as not to rotate.

The feature of this embodiment is that a multi-start thread 10 is used for a bolt 12 as shown in FIG. FIG. 2 shows an example in which a double-start thread is used, but a triple-start thread may be used. A multi-start thread has a larger lead (distance traveled by one rotation) than a single-start thread (lead L = n × P, where n is the number of turns, P
With a slight lever turning operation, the annular electric connection portion 3 following the fastening portion 5 can be securely fastened and connected to the battery post with a large fastening force. In this example, a left-handed screw is used as the multi-start screw 10 due to the position of the lever 14.

The bolt 12 inserted into the shaft hole 8 projects from the other tightening portion 5 as shown in FIG. 3, and the nut portion 13 of the lever 14 is screwed into the front half of the bolt shaft portion 9. Nut part 1
The lever portion 14 stands up in a state where the screw 3 is screwed into the bolt 12 for one rotation, for example, and the electric connection portion 3 can be manually fitted to the battery post 2 in this state.

The nut portion 13 comprises a rectangular portion 13a (FIG. 1) and a cylindrical boss portion 13b integrally projecting from the rectangular portion 13a toward the fastening portion 5 '. A plurality of female screws 16 having the same number of threads as the number of male threads 10 of the bolt 12 are formed in the female screw hole 15 penetrating the bolt 13b. The boss portion 13b comes into contact with the fastening portion 5, and slides and rotates with the fastening portion 5 as a seat surface.

A straight lever portion 17 is integrally formed on one side surface of the rectangular portion 13a. The lever portion 17 is located outside the electrical connection portion 3 by the boss portion 13b, and interference with the electrical connection portion 3 when the lever portion 17 is rotated is prevented. The rotation of the lever 14 causes the nut portion 13 to rotate integrally and to be screwed into the bolt 12, whereby the distance S between the fastening portions 5 and 5 ′ is reduced, and the diameter of the annular electric connection portion 3 is reduced. Then, the battery post 3 is tightened and connected. In FIG. 3, reference numeral 18 denotes a power supply line connected to the crimping section 6.

FIGS. 4 (a) to 4 (e) show the operation of the battery terminal 1. FIG. FIG. 4A corresponds to FIG. 3, and shows the battery post 2 with the lever 14 upright.
And the electric connection portion 3 of the battery terminal 1 are slightly loosely fitted. Next, as shown in FIGS. 4 (b) to 4 (d), the lever 14 is rotated and tilted horizontally as shown in FIG. 4 (e), whereby the multi-threaded screw 10 of the nut portion 13 slides on the multi-threaded screw 10 of the bolt 12. As described above, the nuts 13 and the bolt head 11 sandwich the tightening portions 5 and 5 ′ with each other to reduce the diameter of the electric connection portion 3, thereby firmly fixing the battery post 2 with the electric connection portion 3. Tighten. As a result, a reliable electric connection between the battery terminal 1 and the battery post (battery) 2 is made.

FIG. 5 shows the relationship between the displacement of the lever and the operating force (ie, the fastening force) corresponding to FIGS. 4 (a) to 4 (e). Each state of (a) to (e) in FIG. 4 and a to e in FIG.
Corresponds to each. That is, when the lever 14 is rotated from the state shown in FIG. 4A, the multi-threaded screws 1 of the bolt 12 and the nut 13 in FIG. 4B (displacement b in FIG. 5) are obtained.
The lever operating force gradually rises in the form of a quadratic curve as shown in FIGS. 4 (c) to 4 (e) until the lever operating force gradually increases as shown in FIGS. It becomes maximum when the lever operation of 4 (e) is completed (precisely, immediately before completion).

The lever operating force is also a tightening fixing force to the battery post 2, and when the lever operation is completed, a sufficient tightening force equivalent to the conventional one (e in FIG. 13) can be obtained. Moreover, since there is no unnecessary lock peak (d in FIG. 13) in the related art during the lever operation, the operating force is stable and low, and the operability is extremely good. This is because, instead of the conventional sliding action of the battery post 42 and the cam 48, the annular electric connection portion 3 is tightened by the multi-threaded screws 10 and 16 of the lever integrated nut 13 and the bolt 12.

FIGS. 6 to 10 show a second embodiment of the battery terminal according to the present invention. As shown in FIG. 6, the battery terminal 21 has a tapered annular electric connection portion 23 with respect to the battery post 22, and a pair of fastening portions 25, 2 which protrude and extend on both sides of the cut portion 24 of the electric connection portion 23.
5 ′, and the pair of fastening portions 2
5, 25 ', a pair of nuts 27, 27' of right and left reverse screws, and a single screw shaft (male screw) of right and left reverse screws coaxially screwed into the pair of nuts 27, 27 '. Element)
And a substantially U-shaped lever 29 connected and fixed to both ends of the screw shaft 28.

One of the terminal bodies 26 has a fastening portion 2
5, 25 'are formed, and on the other side of the terminal body 26,
A bolt 30 for connecting a power supply line (not shown) is provided upright. The tightening portions 25 and 25 ′ have a substantially U-shaped nut holding wall 31 integrated with the electric contact portion 23 facing vertically, and a nut insertion space 3 is provided between the upper and lower holding walls 31.
2, and the screw shaft 2 is provided on both sides of the insertion space 32.
8 is formed by forming a cutout 33 through which a hole 8 can be inserted.
Nuts 27, 27 'are vertically inserted into the respective insertion spaces 33, and the nuts 27, 27' are inserted into a pair of tightening portions 25, 25 '.
7 'are located opposite to each other.

As shown in FIGS. 7 and 8, the screw shaft 28 is formed with left and right reversed external screws (reverse screws) 34, 34 'from the center. In this example, multi-threaded screws (for example, three-threaded screws) are employed as the external threads 34 and 34 '. It is not necessary to use a multi-start thread. Left and right male screws 34, 3
4 'is a male screw 1 of the bolt 12 (FIG. 2) of the first embodiment.
The pitch P is set smaller than 0, for example, な い し or less. The internal threads 35, 35 'of the left and right nuts 27, 27' to be screwed with the left and right external threads 34, 34 'are, of course, reversely oriented multi-start threads.

As shown in FIGS. 6 to 8, rectangular bosses 36 are formed at both ends of the screw shaft 28, respectively.
The rectangular holes 37 (FIG. 6) at both ends of the lever 29 are fitted to the lever 29. By rotating the lever 29, the screw shaft 28 can be rotated in the same direction.

In FIG. 6, the electric connection portion 23 can be fitted to the battery post 22 by hand with the lever 29 upright. Then, as shown in FIGS. 9 to 10, the lever 29 is tilted toward the connection bolt 30 so that the screw shaft 28
9, a pair of nuts 27, 27 'screwed to the screw shaft 28 move in a direction approaching each other, and the nut 2
7 and 27 'and the clamping part 25, 25 integrally' the interval S ₁ S
Move in the narrowing direction as in ₂ . Thereby, the diameter of the annular electric connection portion 23 is reduced, and the battery post 22 is firmly tightened. This ensures that the battery terminal 21 is connected to the battery post 22.

In this embodiment, the male screw 3 of the screw shaft 28
Since the pitch P (FIG. 8) of 4, 34 'is set smaller than that of the first embodiment, the operating force of the lever 29 becomes smaller than that of the first embodiment. /
2), and the operability is further improved. The lever operation force diagram is a gentle quadratic curve as in the previous example (FIG. 5), and a low and stable operation force without a lock peak during operation as in the related art can be obtained. Moreover, since the left and right nuts 27, 27 'can be simultaneously moved in the approach direction by lever operation, a sufficient tightening stroke can be obtained,
This achieves a reliable electrical connection.

The tightening stroke is determined by multi-thread screws 34, 34 '.
The size is further increased by using. Further, since there is no sliding portion with the terminal body (such as the nut 13 in the first embodiment), the plating of the terminal body does not wear out, and the corrosion resistance is good even when the battery terminal 21 is repeatedly attached to and detached from the terminal post 2. It is.

[0024]

As described above, the combination of the bolt, nut, and lever of the multi-start thread according to claim 1 of the present invention provides
Tightening connection can be performed easily with a low and stable operating force without unnecessary lock peaks unlike the conventional cam lever. In particular, since a large tightening stroke and a reliable tightening force can be obtained with a small lever displacement by the multi-thread screw, workability and reliability of electrical connection are enhanced. In addition, the combination of the screw shaft of the reverse screw according to the second aspect of the present invention, the pair of nuts and the lever makes the pair of nuts simultaneously movable in the opposite directions, so that the screw pitch is smaller than that of the bolt of the first aspect. The operation force of the lever is further reduced, and the operability and the tightening property are further improved. Further, by combining a multi-thread screw with the configuration of claim 2 as in claim 3, reliable tightening can be obtained with a small lever displacement.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of a battery terminal according to the present invention.

FIG. 2 is a partially cutaway plan view showing a bolt and a nut of a lever.

FIG. 3 is a perspective view showing a state where the battery terminal is connected to the battery post.

FIGS. 4A to 4E are side views sequentially showing the operating state of a lever.

FIG. 5 is a graph showing a relationship between a displacement of a lever and an operation force.

FIG. 6 is a perspective view showing a second embodiment of the battery terminal according to the present invention.

FIG. 7 is an exploded perspective view showing the screw shaft and the nut.

FIG. 8 is a partially cutaway plan view showing the screw shaft and the nut.

FIG. 9 is a perspective view showing a state in which the lever is being operated.

FIG. 10 is a perspective view showing a state where the operation of the lever is completed.

FIG. 11 is an exploded perspective view showing a conventional example.

12 (a) to 12 (e) are side views sequentially showing the operating states of the lever.

FIG. 13 is a graph showing the relationship between lever displacement and operating force in a conventional example.

[Explanation of symbols]

 1,21 Battery terminal 3,23 Electrical connection 5,5 ', 25,25' Tightening part 10,34,34 'Multi-thread screw 12 Bolt 13 Nut part 14,29 Lever 27,27' Nut 28 Screw shaft

──────────────────────────────────────────────────続 き Continuation of the front page (56) Reference Jikken 43-17461 (JP, Y1) (58) Field surveyed (Int. Cl. ⁷ , DB name) H01M 2/30

Claims (3)

(57) [Claims] 1. A battery terminal in which a pair of fastening portions is formed so as to project from a substantially annular electrical connection portion, and a nut is screwed into a bolt penetrating the fastening portion to fasten the electrical connection portion. A battery terminal comprising a multi-threaded screw and a lever integrally formed with the nut. 2. A battery terminal for forming a pair of fastening portions protruding from a substantially annular electrical connection portion and bringing the pair of fastening portions close to each other by rotating a lever to fasten the electrical connection portion. A battery terminal, wherein a nut is fixed to each of the tightening portions, a screw shaft of a right and left reverse screw is screwed to the nut, and an end of the lever is fixed to the screw shaft. 3. The battery terminal according to claim 2, wherein a multi-start thread having a left-right reverse screw is formed on the screw shaft.