JP5158771B2 - Electrical connection device - Google Patents

Description

  The present invention relates to an electrical connection device, and more particularly to a connection device that electrically connects an energizing portion that reciprocates with a fixed portion that is located away from the energizing portion via an intermediate contact. is there.

When a vacuum valve is used in a circuit breaker, a high-pressure electromagnetic contactor, or the like, an electrical connection is made between a movable rod of the vacuum valve and a current-carrying portion on a fixed side different from the vacuum valve. As this connection device, Patent Literature 1 and Patent Literature 2 are publicly known.
In FIG. 4 of Patent Document 1, it is described that the current-carrying portion on the fixed side and the movable rod of the vacuum valve are connected using a mesh conductor.
Further, in Patent Document 2, an energizing contact portion that reciprocates and a fixed contact portion are arranged to face each other and connected by an intermediate contact, and a sliding contact portion is provided on the energizing contact portion side of the intermediate contact that reciprocates, It is described that a contact portion is provided on the fixed contact portion side so as to be able to contact and separate.
JP-A-8-2222091 JP 2005-259450 A

Since the mesh conductor in Patent Document 1 is fixed by the movable rod and the intermediate contact and the fastening means, the number of fastenings increases. Therefore, there is a problem that maintenance such as replacement due to change of energization current or fastening adjustment of fastening means is not easy.
In Patent Document 2, an intermediate contact is configured by using a plurality of contact pieces instead of a net-like conductor following member, and the sliding contact portion provided on the intermediate contact is energized while the energizing contact portion slides. Therefore, the friction generated in the sliding contact portion is large, and the driving device such as an electromagnet for driving the sliding contact portion requires a large force. Needed a lot of power to get. Further, heat due to friction and roughness of the contact surface increase. Particularly in a high-voltage electromagnetic contactor or the like, since the demand for the number of operations is remarkably large, the rough contact surface can be a problem. Further, since the contact piece is bolted to the fixed side, it is not easy to attach and replace.

  An object of the present invention is to provide an electrical connection device that can be easily attached and detached.

Claim 1 of the present invention is a connection device for connecting a fixed-side energization portion and a movable-side energization portion that reciprocates with an intermediate conductor.
In addition to attaching the fixed side holder that is configured in two parts and provided with an engaging part in the fixed side energization part,
The intermediate conductor is formed by laminating a plurality of contact pieces formed in an H shape and having spring characteristics, and the movable-side energizing portion is sandwiched in one H-shaped opening formed in each contact piece. in pressure contact, and the engaging means is formed on the other side of the contact pieces, and connecting the fixed side and a movable side and an engagement portion formed on the stationary holder and the engaging means is engaged, the The movable side energization unit is configured to rotate at the engagement portion during reciprocating motion .

  According to a second aspect of the present invention, the fixed-side energization section is a holder for a power fuse, and the energization section that reciprocates is a movable electrode-side rod of a vacuum valve.

According to a third aspect of the present invention, the engaging part formed in the energizing part on the fixed side is a hole formed in the holder of the power fuse, and the engaging means formed in the contact piece is on the distal end side of the opening It is characterized in that it is a concavo-convex part formed in the above.

  According to a fourth aspect of the present invention, a support column is formed on the holder of the power fuse, and the engagement unit is formed on both sides of the lower connecting portion connected to the support column.

As described above, according to the present invention, since the engaging portion formed in the current-carrying portion on the fixed side is movable, the contact piece itself rotates during operation of the movable electrode, and the sliding contact portion is in contact with the current as in the conventional case. The frictional force is much smaller than when the part is slid and energized, and the operating force of the movable electrode may be small. Therefore, a drive device such as an electromagnet is small and can save power, which is very economical.
In addition, since a fastening method such as a screw is not used for fixing the contact piece, the contact piece can be easily replaced and the working time can be greatly shortened. Further, the current capacity can be changed arbitrarily by increasing or decreasing the number of contact pieces.

  FIG. 1 shows a configuration diagram when an embodiment of the present invention is applied to a high-pressure vacuum electromagnetic contactor (hereinafter referred to as VMC). The VMC has a one-stage configuration for three phases to form a drawer-type VMC unit, and this VMC unit is configured as a multi-stage product such as five stages to constitute a VMC board. In the figure, reference numeral 1 denotes a power fuse, and the fuse 1 is disposed in a fuse receiving portion formed in the insulator 30 of the VMC unit via a holder 20 (20a, 20b) made of a conductor. A vacuum valve 2 is arranged in the same row direction as the power fuse at a lower position of the power fuse 1, and its fixed electrode side is fixed to a mounting portion 31 formed on the insulator 30. Further, an insulating operating rod 3 is disposed at a position opposite to the movable electrode side rod of the vacuum valve 2, and this insulating operating rod 3 is moved in the left-right direction of the drawing in accordance with an operation command from the electromagnetic operating device 4, whereby the vacuum valve 2 ON / OFF control is performed.

Reference numeral 5 denotes a cutoff spring, 8 denotes a ground plate made of a metal plate, and the electromagnetic operating unit 4 is attached to the ground metal plate 8. A contact piece 6 serving as a connection conductor electrically connects between the power fuse holder 20b and the movable electrode side rod of the vacuum valve 2. As shown in FIG. 2, the contact piece 6 is formed in a substantially H shape and has a spring characteristic, and an arbitrary portion is perforated as necessary. In addition, the contact piece 6 is formed with an uneven portion 6a (engagement means) for attaching to the holder 20b as will be described later. A conductor 7 is connected to the fixed electrode of the vacuum valve 2 and is connected to a load via a cable.

Of the holders 20, the power supply side holder 20 a is connected to the bus bar of the VMC board via the conductor 14 and the connector 15. Holder 20b as a load side is formed as shown in FIG. 3 (a) ~ (c) . 3 (a) is lower Fuse, i.e., the contact piece 6 shows the side of the connection-side holder 21 is continuously provided, which is formed in a curved shape to support the conductive portion of the Fuse 1 A support portion 21a, a hole (engagement portion) 21b provided in the lower part connected to the support portion 21a, and opposed to the left and right to fit the uneven portion 6a of the contact piece 6, and a fixed side holder Holes 21c and 21d for attachment and holes 21e for fixing the connection side holder 21 via screws or the like are provided.

The contact piece 6 can be attached to the connection side holder 21 either before or after the connection side holder 21 is fixed to the fixing portion of the VMC unit through the hole 21e. In this case, the movable electrode of the vacuum valve 2 is sandwiched in the opening on the side opposite to the side where the uneven portion 6a is formed. Then, it inserts in the hole 21b of a connection side holder so that opening of the uneven | corrugated | grooved part 6a side of a contact piece may be narrowed, and a convex part is hooked on the hole 21b and stopped. Any number of contact pieces 6 may be attached according to the current capacity to be energized.
When the attachment of the contact piece 6 to the connection side holder 21 is completed, the conductive portion of the power fuse 1 is placed on the support portion 21a, and the power fuse 1 is attached.

As described above, the present invention is configured by the contact piece formed in the H shape with the intermediate-side conductor connecting between the fixed-side energization portion and the movable-side energization portion, and the connection with the fixed-side energization portion is simple by the uneven portion. It has a hook (engaged state) structure, and is connected to the movable side energizing portion so as to be sandwiched by the opening. For this reason, as shown in FIG. 1, when the movable electrode rod of the vacuum valve 2, which is the movable-side energization unit, moves in the horizontal direction of the drawing by the action of the insulating rod 3 and the cutoff spring 5, the movable side of the contact piece 6 Is fixed by the frictional force sandwiching the electrode rod, and therefore follows the movable electrode rod without sliding.
On the other hand, since the contact piece 6 of the fixed-side energization portion is in an engaged state with the holder and has a structure in which the hook is also suspended, the contact piece 6 when the movable electrode rod is operated rotates with the engagement portion as a fulcrum. To do. Therefore, since the frictional force is much smaller than when the current contact part is energized while sliding the sliding contact part as in the prior art, the operating force on the movable electrode of the vacuum valve may be small, the electromagnet can be downsized, Power consumption can be suppressed.

  In addition, since the contact piece only needs to be adjusted according to the magnitude of the current to be energized, the energization current can be easily changed and the sliding phenomenon on the movable side does not occur. Therefore, it can be used for a long time, which is advantageous in terms of maintenance and cost. Furthermore, when the contact piece is taken out for maintenance, etc., the connection side holder is removed, and it is removed in tandem with this holder, so that the work time for assembly, increase / decrease in number, replacement, etc. can be greatly shortened. .

The block diagram which shows embodiment of this invention. The block diagram of a contact piece. It is a block diagram of a connection side holder, (a) is a top view, (b) is a left side view, (c) is a front view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Power fuse 2 ... Vacuum valve 3 ... Insulating rod 4 ... Electromagnetic actuator 5 ... Shut-off spring 6 ... Contact piece 20 ... Holder 21 ... Fixed side holder

Claims (4)

In the connection device that connects the fixed-side energization part and the movable- side energization part that reciprocates with an intermediate conductor,
In addition to attaching the fixed side holder that is configured in two parts and provided with an engaging part in the fixed side energization part,
The intermediate conductor is formed by laminating a plurality of contact pieces formed in an H shape and having spring characteristics, and the movable-side energizing portion is sandwiched in one H-shaped opening formed in each contact piece. in pressure contact, and the engaging means is formed on the other side of the contact pieces, and connecting the fixed side and a movable side and an engagement portion formed on the stationary holder and the engaging means is engaged, the An electrical connection device configured to rotate at the engaging portion during a reciprocating motion of the movable side energization unit . 2. The electrical connection device according to claim 1, wherein the fixed-side energization unit is a holder for a power fuse, and the energization unit that reciprocates is a movable electrode-side rod of a vacuum valve. Engagement portion formed on the conductive portion of the fixed side is a hole formed in the holder Fuse, engaging means formed on said contact piece is a concave-convex portion formed at the opening tip side The electrical connection device according to claim 2, wherein: 4. The electrical connection device according to claim 2, wherein a column portion is formed on the holder of the power fuse, and the engaging portion is formed on both sides of a lower connection portion connected to the column portion.

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