JPH04281352A - Terminal block for electric appliance - Google Patents

Abstract

PURPOSE:To provide a terminal block, constituting the power supply I/O terminal section for an electric appliance to be mounted on an automobile, in which sufficient insulation strength and reliability are achieved and the terminal cable is clamped firmly. CONSTITUTION:A first insulation bush 17 having a flange 172 is fitted in the fixing hole 16 of a fixing board 15 and then a second insulation bush 18 is fitted thereon. A terminal bolt 13 is set so that it is surrounded by the first and second insulation bushes and then the bolt 13 is secured by means of a nut 20. A stop bush 21 is further fitted to the second insulation bush 18 so that rotation is blocked with respect to a stop board 23 and a terminal member 22 of a terminal cable 14 is set with respect to the stop bush 21 so that the rotation is blocked and then fixed by means of a terminal nut 24.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to an input/output terminal section formed in an electrical equipment for automobiles, such as a starter motor or a generator for automobiles, and for connecting an input/output terminal cable to this terminal section. The present invention relates to a connection terminal device for electrical equipment to be connected.

0002

2. Description of the Related Art Electrical equipment such as motors and generators mounted on automobiles, for example, are placed in environments with extremely strong mechanical vibrations. Therefore, the input/output terminals of these electrical devices must have a structure that not only improves workability in areas with limited volume but also provides sufficient connection strength and stability against mechanical vibrations. is required.

As a terminal device that satisfies such requirements, an insulating bush for an output terminal of an automobile generator as shown in, for example, Japanese Utility Model Application Laid-Open No. 62-41356 has been considered. FIG. 5 shows its cross-sectional structure, in which an insulating bush 53 is fitted into a mounting hole 52 of a mounting board 51. The insulating bush 53 is formed into a cylindrical shape so as to fit around the outer periphery of the input/output bolt 54, and has a cutout groove 56 formed on the circumferential surface of the insulating bush 53 into which the input/output cable 55 is fitted.

That is, by fitting the input/output cable 55 into the cutout groove 56, the input/output cable 55 is prevented from rotating around the input/output bolt 54. Therefore, in such a structure, the input/output cable 55 may be twisted around the insulating bush 5.
3, it becomes difficult to ensure sufficient insulation of the input/output bolt 54 or input/output cable 55 portion.

[0005]

[Problems to be Solved by the Invention] This invention has been made in view of the above points, and it is an object of the present invention to easily and reliably set the rotation stop position without reducing the insulation properties of the input/output cable connected to the terminal bolt. It is an object of the present invention to provide a connection terminal device for electrical equipment that can be used effectively when mounted on a vehicle, and which can securely fix the terminal member of the input/output cable.

[0006]

[Means for Solving the Problems] A connecting terminal device for electrical equipment according to the present invention includes a terminal bolt inserted into a terminal mounting hole formed in a mounting board through a first cylindrical insulating bush, and a terminal bolt inserted into a terminal mounting hole formed in a mounting board. The second insulating bushing has a second
The first insulating bush is fitted, and the second insulating bush is attached using a fixing nut screwed onto the terminal bolt, and the terminal bolt is attached to the board. In addition, by fitting a non-rotating bush around the outer periphery of the second insulating bush and tightening a terminal nut through the non-rotating bush, the terminal portion of the terminal cable is fitted and fixed to the terminal bolt, and the terminal part of the terminal cable is fixed to the terminal bolt. a first molded portion that engages with a rotation preventing member formed on the terminal portion of the terminal cable;
and a second molded portion that engages with a fixing member integrally formed on the substrate.

[0007]

[Operation] In the connection terminal device configured in this way,
The terminal bolt is firmly fixed by inserting the terminal bolt into the mounting hole of the mounting board through the first insulating bushing, further fitting the second insulating bushing into the first insulating bushing, and tightening the fixing nut. Ru. Further, a detent bush is fitted to the second insulating bush, a terminal portion of the terminal cable is fitted into a terminal bolt, and the terminal nut is attached and fixed. In this case, the anti-rotation member formed on the terminal portion of the terminal cable is engaged with the first molded portion of the anti-rotation bushing, and the second molded portion of the anti-rotation bush is a fixing member formed integrally with the substrate. The rotation of the detent bushing is prevented, and the terminal portion of the terminal cable is also prevented from rotating, so that the terminal cable is firmly connected.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Figures 1 and 2 show its configuration.
This example shows the configuration of a terminal portion of a reduction type motor for an automobile, and a starter is set as an electric device. This starter includes a motor section that rotates a pinion gear (not shown), and a magnetic switch mechanism 11 that controls the coupling between the pinion gear and the engine and controls the main current on and off.

The magnetic switch mechanism 11 is provided with a fixed terminal 12 that supplies power to the motor section via a movable contact (not shown). The terminal cable 14 connected to the battery power source is connected.

The fixed terminal 12 and the terminal bolt 13 are attached to a mounting board 15 made of a case made of aluminum, for example, and a terminal mounting hole 16 is formed in this board 15. Fixed terminal 12
An opening is formed coaxially with the mounting hole 16, and the fixed terminal 12 is set opposite to the back surface of the substrate 15 with the opening and the mounting hole 16 coaxially arranged. In addition, the terminal bolt 13 has a thread groove 1 on the outer periphery of the tip.
31 is formed, and a flange 132 is provided at the other end, and this flange 132 is brought into contact with the surface of the fixed terminal 12 to open the opening of the fixed terminal 12 and the mounting hole of the board 15. 16.

A first insulating bush 17 is fitted into the mounting hole 16 of the board 15. Insulating bush 17
is composed of, for example, thermosetting resin,
A cylindrical portion 17 that surrounds the outer periphery of the terminal bolt 13
1 , and a flange 172 interposed between the fixed terminal 12 and the back surface of the board 15 , and between the board 15 and the terminal bolt 13 and between the fixed terminal 12 and the board 15 .
There is insulation between each.

Fixed terminal 1 of this first insulating bush 17
A second insulating bush 18 having an annular shape is further fitted into the outer periphery on the opposite side from the second insulating bush 18 . The second insulating bush 18 is made of the same thermosetting resin as the first insulating bush 17, and its inner diameter is slightly smaller than the outer diameter of the cylindrical portion 171 of the first insulating bush 17. , are closely fitted to the outside of the first insulating bush 17. The second insulating bush 18 ensures insulation between the terminal bolt 13 and the substrate 15 that contacts the outer periphery of the first insulating bush 17.

Once the first and second insulating bushes 17 and 18 are set in an overlapping state in this manner, the fixing nut 2 is attached to the terminal bolt 13 via the washer 19.
0 and tighten. Then, the terminal bolt 13 is firmly attached and fixed to the board 15 while being insulated via the first and second insulating bushes 17 and 18.

With the terminal bolt 13 attached in this manner, the detent bush 21 is further fitted into the outer peripheral portion of the tip of the second insulating bush 18. This anti-rotation bush 21 is made of, for example, polyamide resin or glass-filled polyamide resin, and is integrally formed by resin molding.

FIG. 2 shows this anti-rotation bush 21 taken out, and has an annular structure that is fitted to the outer periphery of the fixing nut 20 and is engaged with the tip of the second insulating bush 18. A retaining claw 211 is provided. Then, this anti-rotation bush 21 is attached to the second insulating bush 18.
In the fitted state, the locking pawl 211 abuts against the notch 181 formed on the outer peripheral surface of the second insulating bushing 18, thereby preventing the detent bushing 21 from coming off.

A terminal member 2 that is integrally connected to the tip of the terminal cable 14 is disposed on the anti-rotation bush 21.
2 is set in parallel. As shown in FIG. 4, this terminal member 22 is composed of an annular plate having an opening 221 in the center of the conductive metal plate through which the terminal bolt 13 is passed.
A plurality of pawls 222 are formed so as to protrude toward the anti-rotation bush 21 . A plurality of claws 22 of the terminal member 22 are provided on the outer periphery of the anti-rotation bush 21.
2 are respectively engaged with the notches 212.
is formed. That is, the claw 222 is the notch 2
12, the detent bush 2
The terminal member 22 is prevented from being rotated with respect to the terminal member 1.

A locking protrusion 213 is further formed on the outer periphery of the detent bush 21. This locking protrusion 21
3 is set by fitting into a locking groove 231 formed in a locking plate 23 that is integrally attached to the side surface of the magnetic switch mechanism 11 with a bolt or the like, and the locking bush 21 is fitted on the outer periphery of the terminal bolt 13. This prevents it from being rotated.

In this way, the detent bush 21 is attached to the second insulating bush 18, and the locking protrusion 213
is engaged with the locking groove 231 of the locking plate 23,
As mentioned above, the terminal member 22 of the terminal cable 14 is set, and in this state, the terminal nut 2 is attached to the terminal bolt 13.
4 are screwed together and tightened to connect the terminal member 22 to the terminal bolt 13. That is, the terminal cable 14
is electrically connected to the fixed terminal 12 via the terminal bolt 13, and the terminal member 22 is electrically connected to the fixed terminal 12 via the terminal bolt 13.
It is firmly attached and set without rotating around it.

That is, in the connecting terminal device constructed in this manner, the first and second insulating bushes 17 and 18 reliably maintain insulation between the terminal bolt 13 and the board 15, and Second insulation bush 18
The locking bushing 21 that is set to be fitted to the terminal bolt 13 is reliably prevented from rotating around the terminal bolt 13 by a locking protrusion 213 formed on its outer periphery. Also, the terminal cable 14 is
The terminal members 22 of the terminal members 22 are connected in a non-rotating state, and the terminal cable 14 is reliably connected.

[0020] It should be noted that the anti-rotation bush 21 shown in the embodiment
The locking structure of the terminal member 22 and the locking structure of the locking protrusion 213 of the locking bush 21 can be similarly implemented even if the structures of the protrusion and locking portion are reversed.

[0021]

[Effects of the Invention] As described above, according to the connection terminal device for electrical equipment according to the present invention, sufficient insulation strength against mechanical vibration etc. can be obtained even when applied to, for example, in-vehicle equipment. At the same time, the connected state of the terminal cable can be maintained in a state in which movement, especially in the rotational direction, is reliably regulated. Therefore, a very reliable terminal structure is realized.

[Brief explanation of the drawing]

FIG. 1 is a plan view for explaining the configuration of a connection terminal device according to an embodiment of the present invention.

FIG. 2 is a sectional view of a portion corresponding to line 2-2 in FIG. 1;

FIG. 3 is a diagram illustrating the anti-rotation bush used in the above embodiment.

FIG. 4 similarly shows the terminal member portion of the terminal cable, with (A) being a plan view and (B) being a side view.

FIG. 5 is a sectional view showing a conventional connection terminal device.

[Explanation of symbols]

11... Magnetic switch mechanism, 12... Fixed terminal, 13
...Terminal bolt, 14...Terminal cable, 15...Mounting board, 16...Mounting hole, 17...First insulating bush, 1
8...Second insulating bush, 20...Fixing nut, 21...Stopping bush, 211...Claw, 212...Notch,
213...locking protrusion, 22...terminal member, 23...locking plate,
231...locking groove, 24...terminal nut.

Claims (1)

[Claims] 1. A cylindrical first insulating bushing having a flange that is inserted into a terminal mounting hole formed in a terminal mounting board and comes into contact with a surface of the board opposite to a terminal protruding surface; , a terminal bolt that is inserted through the hollow part of the first insulating bushing, has a flange that contacts the flange part, and has a threaded groove formed on the outer periphery in the direction of the tip protruding from the first insulating bushing; A second insulating bush is inserted from the distal end of the terminal bolt and is fitted onto the outer periphery of the first insulating bush; and a first insulating bushing that is fitted into the outer periphery of the second insulating bush and engages with a rotation prevention member formed on the cable terminal member to be connected.
and a detent bushing having a second molded part on its periphery that engages with a fixing member integral with the substrate, and engages with the detent bushing to attach the terminal bolt to the terminal bolt. 1. A connecting terminal device for electrical equipment, characterized in that terminal members are fitted together and fixedly connected by a terminal nut screwed onto the terminal bolt.