JPS5922665Y2 - Rotating conductor connection device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a rotating conductor connecting device that rotatably connects a first conductor and a second conductor.

A conventional rotating conductor connecting device has a first conductor and a second conductor installed adjacent to each other, and a pair of disc springs installed on the outer surfaces of each of the first conductor and the second conductor. , a bolt was inserted through the first and second conductors and a pair of disc springs, and a nut was tightened on the bolt.

However, with this conventional rotating conductor connecting device, sufficient contact pressure between the first conductor and the second conductor could not be obtained.

Therefore, when the first conductor becomes hot and the second conductor is used to dissipate heat, there is a drawback that heat conduction between the first conductor and the second conductor is insufficient, and heat dissipation is not sufficient. Ta.

This idea was made in view of the conventional drawbacks.

The case where the rotating conductor connecting device of this invention is applied to an air circuit breaker will be explained below.

FIG. 1 is a side view showing an embodiment in which the rotating conductor connecting device according to the invention is applied to an air circuit breaker.

FIG. 2 is a side view taken along line II--II in FIG.

FIG. 3 is a side view taken along line III--III in FIG. 1.

FIG. 4 is a side view taken along line IV--IV in FIG. 3.

Figures 2 to 4 show only the main parts, respectively.
Identical parts in each figure are designated by the same reference numerals.

In FIGS. 1 to 4, first and second bushings 1 and 2 are inserted through holes 3a of a fixed frame 3 of a circuit breaker, respectively.

The flange 4 is fixed to the first and second bushings 1.degree. 2, which are attached to the fixed frame 3 by bolts 5 and nuts 6, respectively.

The inner conductor 1a of the first bushing 1 is connected to the first contact limb 7
It is brazed to one end of the.

The first contact limb 7 is configured in a U-shape, and one end, which is a vertical portion of the U-shape, is brazed to the internal conductor 1a.

The other end, which is the end of the U-shaped parallel horizontal portion of the contact limb 7 of No.
It is sandwiched between one end and one end of a pair of movable heat radiation conductors 9.

The bolt 10 rotatably connects one end of the movable main contact 8, the other end of the first contact limb 7, and one end of the movable heat radiation conductor 9.

A pair of disc springs 11 are respectively installed on the outer surface of the movable main contact 8, and a pair of thin plate springs 12 are respectively installed on the movable heat dissipation conductor 9.
installed on the inside surface of the

The support conductor 13 is installed between a pair of thin plate-shaped springs 12, and a bolt 10 is inserted through each of them.

Nut 14 is screwed onto pole 10.

■A ring-shaped spacer 15 is inserted between the other ends of the pair of movable main contacts 8 and the other ends of the pair of movable heat dissipation conductors 9, and the pair of movable heat dissipation conductors One end of a movable arc contactor 16 is inserted between the other ends of the conductor 9 .

The bolts 17 are inserted through the other ends of the pair of movable main contacts 8, the other ends of the pair of movable heat radiation conductors 9, the spacer 15, and one end of the movable arc contact 16, and 16 is attached to the movable main contact 8 and the movable heat radiation conductor 9.

The second contact limb 18 is configured in a U-shape as shown in FIGS. 3 and 4, and one end, which is the vertical portion of the U-shape, is brazed to the internal conductor 2a of the second bushing 2. .

As shown in FIGS. 1 and 3, one end of a pair of fixed arc contacts 19 is attached to the upper part of the other end of the second contact limb 18, which is a U-shaped parallel horizontal portion. and Natsuto 2
It is installed in 1.

A pair of fixed arc contacts 19 are made of conductive spring material, and the other end is connected to the movable arc contact 1 as shown in FIG.
It is holding the other end of 6.

As shown in FIGS. 1 and 4, one end of two pairs of fixed main contacts 22 are attached to the lower part of the other end of the second contact limb 18, which is a U-shaped parallel horizontal part. , 23 and Natsu 24
It is installed in

The two pairs of fixed main contacts 22 are made of conductive spring material,
The other end holds the other end of the movable main contact 8 as shown in FIG.

An operation rod 25 connected to an opening/closing operation mechanism (not shown) is rotatably attached to the movable main contact 8 by a pin 26.

Next, this operation will be explained.

In the state shown in Figure 1, the current flows mainly through the internal conductor 1.
a→first contact limb 7→movable main contact 8→fixed main contact 22→second contact schedule 18→internal conductor 2a.

Now, when an overcurrent flows through this circuit, an opening/closing operation mechanism (not shown) operates to operate the operation rod 25 in the direction of arrow A shown in FIG.

Therefore, the movable main contact 8 rotates counterclockwise around the bolt 10, first the movable main contact 8 separates from the fixed main contact 22, and then the movable arc contact 16 moves from the fixed arc contact. 19 to cut off the circuit.

Further, when the circuit is to be turned on, an opening/closing operation mechanism (not shown) is operated to operate the operation rod 25 in the direction opposite to the arrow A shown in FIG.

Therefore, the movable main contact 8 rotates clockwise around the bolt 10, and first the movable arc contact 16 contacts the fixed arc contact 19, and then the movable main contact 8 contacts the fixed main contact 22. and turn on the circuit.

In this case, in the part of the bolt 10 where the movable main contact 8 rotates, the first contact limb 7, the movable heat dissipation conductor 9, and the movable main contact 8 are firmly contacted by the thin plate spring 12. There is.

Therefore, the amount of heat mainly generated between the first contact limb 7 and the movable main contact 8, between the movable main contact 8 and the fixed main contact 22, and between the movable arc contact 16 and the fixed arc contact 19 is wide. The heat is transmitted to the movable heat dissipation conductor 9 having a heat dissipation area, and the temperature of the conductive portion is averaged, thereby lowering the temperature of the entire circuit breaker.

As described above, according to this invention, by press-welding the conductors of a plurality of rotating parts using thin plate-like springs, it is possible to enhance the heat transfer effect between the conductors and reduce the temperature rise of the conductors.

[Brief explanation of drawings]

FIG. 1 is a side view showing an embodiment in which the rotating conductor connecting device according to the invention is applied to an air circuit breaker. FIG. 2 is a side view taken along line II--II in FIG. FIG. 3 is a side view taken along line III--III in FIG. 1. FIG. 4 is a side view taken along line IV--IV in FIG. In the figures, the same parts are given the same reference numerals, 8 is a movable main contact, 9 is a movable heat radiation conductor, 10 is a bolt, 11 is a disc spring, and 12 is a thin plate spring.

Claims (1)

[Scope of utility model registration request] U-shaped contact limbs, a pair of movable main contacts each having one end in contact with the outer surface of each of the parallel lateral portions of the U-shape, each of the parallel lateral portions of the U-shape; a pair of movable heat dissipation conductors installed with one end of each in contact with the inner surface of the movable heat dissipation conductor, and one end of each of the pair of movable heat dissipation conductors with thin plate-like springs interposed between the pair of movable heat dissipation conductors. a supporting conductor installed in contact with the outer surface of one end of each of the pair of movable main contacts; One end of each of the pair of movable main contacts, one end of each of the pair of movable heat dissipation conductors, the thin plate spring, the support conductor, and the pair of disc springs are inserted through and tightened with a nut. A rotary conductor connecting device comprising a bolt, the pair of movable heat dissipating conductors being pressed into contact with the inner surface of the U-shaped parallel horizontal portions by the thin plate spring.