High-resistance current-limiting contact structure

Abstract

The utility model discloses a high-resistance current-limiting contact structure, which comprises an arc-shaped bent connecting piece, a static contact part detachably arranged on the connecting piece, a supporting seat arranged at the bottom of the connecting piece and an upper cover body arranged on the static contact part, the supporting seat is provided with an abutting block which is connected with the static contact part in an abutting manner. The upper cover body is provided with an arc-shaped part arranged on the connecting piece; and the arc-shaped part is arranged between the static contact part and the connecting piece. The utility model has the advantage of preventing close-range partial discharge so as to reduce the damage of parts.

Description

Technical Field

[0001] This utility model relates to the field of switching electrical appliance technology, and in particular to a high-resistance current-limiting contact structure. Background Technology

[0002] When circuit breakers are tested, the space is limited, the electrical clearance is too small, and the creepage distance is too short, which can easily lead to close-range partial discharge and cause close-range burn-out damage to components. Utility Model Content

[0003] The purpose of this invention is to provide a high-resistance current-limiting contact structure. This invention has the advantage of preventing near-field partial discharge, thereby reducing damage to components.

[0004] The technical solution of this utility model is as follows: a high-resistance current-limiting contact structure, including an arc-shaped curved connector, a detachable stationary contact portion on the connector, a support base at the bottom of the connector, and an upper cover on the stationary contact portion; the support base is provided with an abutting block that abuts and connects with the stationary contact portion; the upper cover is provided with an arc-shaped portion formed on the connector; the arc-shaped portion is located between the stationary contact portion and the connector.

[0005] In the aforementioned high-resistance current-limiting contact structure, the connector includes a connecting part, a bent part that is bent and connected to the connecting part, a plug hole located at the end of the bent part for mounting a stationary contact, and a pin that passes through the plug hole to fix the stationary contact.

[0006] In the aforementioned high-resistance current-limiting contact structure, the stationary contact is bent, with an arc-shaped upper end and a stationary contact mounting base connected to the connector at the lower end; a stationary contact slot is provided in the middle of the stationary contact.

[0007] In the aforementioned high-resistance current-limiting contact structure, the support base further includes a base and a locking block; the abutting block is disposed on the base and abuts against the lower part of the arc-drawing angle; the locking block passes through the stationary contact slot in a mountain shape and locks the stationary contact part.

[0008] In the aforementioned high-resistance current-limiting contact structure, the front end of the upper cover is an arc-shaped part, a hollow mounting groove is provided in the middle, and a locking groove is provided at the end; the stationary contact passes through the mounting groove; the locking groove is engaged with the stationary contact.

[0009] Compared with the prior art, the present invention, by setting a connector, a detachable stationary contact, a support base and an upper cover covering the stationary contact, and the upper cover having an arc-shaped part located between the connector and the stationary contact, can increase the creepage distance, thereby effectively preventing close-range partial discharge from causing close-range burn damage to components.

[0010] Furthermore, the support base is equipped with an abutment block that abuts against the stationary contact to limit the contact position and prevent the contact from deforming downwards.

[0011] Therefore, this invention has the advantage of preventing near-field partial discharge, thereby reducing damage to components. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is an exploded view of this utility model;

[0014] Figure 3 This is a schematic diagram of the structure of this utility model without the top cover;

[0015] Figure 4 This is a top view of the present invention;

[0016] Figure 5 This is a side view of the present invention;

[0017] Figure 6 This is a bottom view of the present invention.

[0018] The markings in the attached diagram are as follows: 1-connector, 11-connecting part, 12-bent part, 13-pin, 14-insertion hole, 2-stationary contact part, 21-arc angle, 22-stationary contact slot, 23-stationary contact mounting base, 3-support base, 31-base, 32-abutting block, 33-locking block, 4-upper cover, 41-arc-shaped part, 42-mounting groove, 43-locking groove. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0020] Example. A high-resistance current-limiting contact structure, such as... Figure 1-6 As shown, it includes an arc-shaped connector 1, a detachable stationary contact 2 on the connector 1, a support base 3 at the bottom of the connector 1, and an upper cover 4 on the stationary contact 2; the support base 3 is provided with an abutting block 32 that abuts against and connects with the stationary contact 2; the upper cover 4 is provided with an arc-shaped portion 41 formed on the connector 1; the arc-shaped portion 41 is located between the stationary contact 2 and the connector 1.

[0021] The connector 1 includes a connecting part 11, a bent part 12 that is bent and connected to the connecting part 11, a plug hole 14 provided at the end of the bent part 12 for installing the stationary contact 2, and a pin 13 that passes through the plug hole 14 to fix the stationary contact 2.

[0022] The stationary contact 2 is curved, with an arc angle 21 at the upper end and a stationary contact mounting base 23 connected to the connector 1 at the lower end; a stationary contact groove 22 is provided in the middle of the stationary contact 2.

[0023] The support base 3 also includes a base 31 and a locking block 33; the abutting block 32 is disposed on the base 31 and abuts against the lower part of the arc angle 21; the locking block 33 passes through the stationary contact slot 22 in a mountain shape and locks the stationary contact part 2.

[0024] The front end of the upper cover 4 is an arc-shaped part 41, the middle part has a hollow mounting groove 42, and the end has a locking groove 43; the stationary contact part 2 passes through the mounting groove 42; the locking groove 43 is engaged with the stationary contact part 2.

Claims

1. A high-resistance current-limiting contact structure, characterized in that: It includes an arc-shaped connector (1), a detachable stationary contact (2) on the connector (1), a support base (3) at the bottom of the connector (1), and an upper cover (4) on the stationary contact (2); the support base (3) is provided with an abutting block (32) that abuts against the stationary contact (2); the upper cover (4) is provided with an arc-shaped part (41) opened on the connector (1); the arc-shaped part (41) is located between the stationary contact (2) and the connector (1).

2. The high-resistance current-limiting contact structure according to claim 1, characterized in that: The connector (1) includes a connecting part (11), a bent part (12) that is bent and connected to the connecting part (11), a plug hole (14) provided at the end of the bent part (12) for installing the stationary contact part (2), and a pin (13) that passes through the plug hole (14) to fix the stationary contact part (2).

3. The high-resistance current-limiting contact structure according to claim 1, characterized in that: The stationary contact part (2) is bent, with an arc angle (21) at the upper end and a stationary contact mounting base (23) connected to the connector (1) at the lower end; a stationary contact groove (22) is provided in the middle of the stationary contact part (2).

4. The high-resistance current-limiting contact structure according to claim 3, characterized in that: The support base (3) also includes a base (31) and a locking block (33); the abutting block (32) is located on the base (31) and abuts against the lower part of the arc angle (21); the locking block (33) passes through the stationary contact slot (22) in a mountain shape and locks the stationary contact part (2).

5. The high-resistance current-limiting contact structure according to claim 3, characterized in that: The upper cover (4) has an arc-shaped part (41) at the front end, a hollow mounting groove (42) in the middle, and a locking groove (43) at the end; the stationary contact part (2) passes through the mounting groove (42); the locking groove (43) is engaged with the stationary contact part (2).

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