Clamping mounting bracket for molded case circuit breaker

Abstract

The utility model belongs to the technical field of circuit breakers, particularly relates to a clamping mounting bracket for a molded case circuit breaker, and aims to solve the problem that a conventional bracket for positioning and supporting a metal arc extinguishing sheet is usually made of only two plastic separation blades, has no stability and is easy to deform in a long-time use process. The utility model relates to a metal arc extinguishing sheet installation structure which comprises a circuit breaker body, a closing wrench is installed on the circuit breaker body, a plurality of installation supports are arranged in the circuit breaker body at equal intervals, each installation support further comprises a supporting mechanism, and the supporting mechanisms are installed in the circuit breaker body. The multiple metal arc extinguishing sheets are stably positioned and installed by rotating the pressing rod, so that the metal arc extinguishing sheets can be stably supported, and the problem of deformation can be prevented in the long-time use process.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a clamping installation bracket for a molded case circuit breaker. Background Art

[0002] Molded case circuit breakers can automatically cut off the current when the current exceeds the trip setting. Molded case refers to the plastic insulator used as the outer shell of the device to isolate the conductors and the grounded metal parts. Molded case circuit breakers usually contain thermal magnetic trip units, and large-sized molded case circuit breakers are equipped with solid-state trip sensors. Its trip units are divided into: thermal magnetic trip and electronic trip.

[0003] An arc extinguishing chamber for extinguishing arcs during the breaking process is generally provided in a molded case circuit breaker. The arc extinguishing chamber is made of a corresponding bracket and a plurality of metal arc extinguishing sheets. However, the bracket currently used for positioning and supporting the metal arc extinguishing sheets is often made of only two plastic baffles, which lacks stability and is prone to deformation during long-term use. Therefore, we propose a molded case circuit breaker clip-on mounting bracket to solve the above-mentioned problems. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that the bracket currently used for positioning and supporting the metal arc-extinguishing plate in the prior art is often made of only two plastic baffles, has no stability, and is prone to deformation during long-term use, and a molded case circuit breaker clamping mounting bracket is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The clamping mounting bracket of the molded case circuit breaker comprises a circuit breaker body, a closing wrench is mounted on the circuit breaker body, and a plurality of mounting brackets are arranged at equal intervals in the circuit breaker body. The mounting bracket also comprises:

[0007] A supporting mechanism, the supporting mechanism is installed in the circuit breaker body;

[0008] A plurality of metal arc-extinguishing sheets are fixed in the supporting mechanism at equal intervals;

[0009] The limiting mechanism is installed on the supporting mechanism and is used to brake and limit multiple metal arc-extinguishing sheets.

[0010] In a possible design, the support mechanism includes two bracket baffles, which are arranged in the circuit breaker body, and the same bottom beam is fixedly installed on the bottom of the side where the two bracket baffles are close to each other, and the number of bottom beams is multiple, and the same U-shaped frame is fixedly installed on the side where the two bracket baffles are close to each other, and the number of U-shaped frames is multiple, and multiple metal arc-extinguishing sheets are respectively inserted into corresponding U-shaped frames.

[0011] In a possible design, a clamping hole is opened on the inner wall of the bottom of the U-shaped frame, and two elastic plates arranged at an angle are symmetrically fixedly installed on the bottom of the metal arc-extinguishing plate. The two elastic plates pass through the clamping hole, and arc-shaped protrusions are fixedly installed on the bottom of the two elastic plates on the side away from each other, and the arc-shaped protrusions are clamped with the U-shaped frame.

[0012] In a possible design, a same arc-shaped spring sheet is fixedly mounted on one side of the two elastic plates close to each other, and a buffer hole is provided on the arc-shaped spring sheet.

[0013] In a possible design, the limiting mechanism includes a connecting rod fixedly connected to the side of the two bracket baffles close to each other, a connecting ring is rotatably sleeved on the connecting rod, a mounting plate is fixedly installed on the top of the connecting ring, a pressure rod is fixedly installed on one side of the mounting plate, the bottom of the pressure rod is an arc surface structure, the pressure rod is used to press and limit multiple metal arc-extinguishing plates, and multiple arc-shaped blocks are fixedly installed at equal intervals on the bottom of the pressure rod, the arc-shaped blocks are located between two adjacent metal arc-extinguishing plates, and the arc-shaped blocks are used to provide lateral limiting support for the two adjacent metal arc-extinguishing plates, and the same snap assembly is installed on the side of the two bracket baffles close to each other, and the snap assembly is snapped onto the pressure rod.

[0014] In a possible design, the buckle assembly includes a support rod fixedly installed on one side of the two bracket baffles, an arc groove is opened on the top of the support rod, the bottom of the pressure rod passes through the arc groove, and two inclined buckles are symmetrically fixedly installed on the top of the support rod, and the two inclined buckles are clamped with the pressure rod.

[0015] In the present application, multiple metal arc-extinguishing sheets are inserted into the corresponding U-shaped frames. At this time, the two arc-shaped protrusions can be inserted into the clamping holes. At this time, under the limiting action of the inner wall of the clamping hole, the elastic plate can be bent. After the arc-shaped protrusion moves to the bottom of the U-shaped frame, the elastic plate can be restored, and the arc-shaped protrusion and the U-shaped frame can be clamped together, so that the metal arc-extinguishing sheet can be initially positioned. Thereafter, the pressure rod can be rotated. After the pressure rod is rotated to contact the inclined surfaces of the two inclined surface buckles, the two inclined surface buckles can be pushed to bend to the side away from each other as the pressure rod continues to rotate downward. After the pressure rod presses the multiple metal arc-extinguishing sheets, the two inclined surface buckles will be located at the pressure position. The top of the rod can be elastically reset and moved closer to the side close to each other, so that the pressure rod can be clamped, so as to limit the pressure rod. After the pressure rod is limited, the pressure rod in the horizontal position can be placed on multiple metal arc-extinguishing plates, and the multiple arc-shaped blocks arranged on the pressure rod will be located on two adjacent metal arc-extinguishing plates, which can laterally limit the two adjacent metal arc-extinguishing plates, and when the pressure rod presses the metal arc-extinguishing plates, it can prevent them from detaching from the U-shaped frame, so as to achieve stable support and installation of the metal arc-extinguishing plates. After the metal arc-extinguishing plates are installed, the assembled whole device can be installed in the circuit breaker body.

[0016] In the utility model, the clamping mounting bracket of the molded case circuit breaker can have good support performance through the supporting mechanism, which is made of two bracket baffles, multiple bottom beams and multiple U-shaped frames, so that when multiple metal arc-extinguishing sheets are positioned and installed, the multiple metal arc-extinguishing sheets can be stably supported without deformation.

[0017] In the utility model, the clamping mounting bracket of the molded case circuit breaker can be used to insert a plurality of metal arc-extinguishing sheets into the corresponding U-shaped frame through the limiting mechanism. At this time, the pressure rod can be rotated to a horizontal state and placed on the plurality of metal arc-extinguishing sheets, so that the plurality of arc-shaped stoppers can be used to limit the position of two adjacent metal arc-extinguishing sheets in the horizontal direction. When the pressure rod is pressing the metal arc-extinguishing sheet, it can prevent the metal arc-extinguishing sheet from being separated from the U-shaped frame, so that the metal arc-extinguishing sheet can be stably supported and installed;

[0018] The utility model can stably position and install the multiple metal arc-extinguishing sheets by rotating the pressure rod after the multiple metal arc-extinguishing sheets are inserted into the corresponding U-shaped frames, so that the metal arc-extinguishing sheets can be stably supported and deformation problems can be prevented during long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional schematic diagram of the overall structure of the clamping mounting bracket of the molded case circuit breaker proposed by the utility model;

[0020] Figure 2It is a three-dimensional schematic diagram of the cross-sectional structure of the clamping mounting bracket of the molded case circuit breaker proposed by the utility model;

[0021] Figure 3 A three-dimensional schematic diagram of the arc extinguishing chamber structure of the clamping mounting bracket of the molded case circuit breaker proposed by the utility model;

[0022] Figure 4 A three-dimensional schematic diagram of the arc extinguishing chamber of the molded case circuit breaker clamping mounting bracket proposed by the utility model when viewed from above;

[0023] Figure 5 It is a three-dimensional schematic diagram of the connection structure of the bracket baffle, connecting rod, pressure rod and support rod of the clamping mounting bracket of the molded case circuit breaker proposed by the utility model.

[0024] In the figure: 1. circuit breaker body; 2. closing wrench; 3. bracket baffle; 4. bottom beam; 5. U-shaped frame; 6. metal arc extinguishing plate; 7. clamping hole; 8. arc-shaped protrusion; 9. elastic plate; 10. arc-shaped spring sheet; 11. connecting rod; 12. connecting ring; 13. mounting plate; 14. pressure rod; 15. support rod; 16. inclined buckle; 17. arc-shaped stopper. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] Example 1

[0027] Reference Figure 1-5 The mounting bracket comprises a circuit breaker body 1, a supporting mechanism, a plurality of metal arc-extinguishing pieces 6 and a limiting mechanism. A closing wrench 2 is mounted on the circuit breaker body 1. A plurality of mounting brackets are arranged at equal intervals in the circuit breaker body 1. The supporting mechanism is mounted in the circuit breaker body 1. A plurality of metal arc-extinguishing pieces 6 are clamped in the supporting mechanism at equal intervals. The limiting mechanism is mounted on the supporting mechanism. The limiting mechanism is used to brake and limit the plurality of metal arc-extinguishing pieces 6.

[0028] The supporting mechanism includes two bracket baffles 3, which are arranged in the circuit breaker body 1. The same bottom beam 4 is fixedly installed on the bottom of the side where the two bracket baffles 3 are close to each other, and the number of bottom beams 4 is multiple. The same U-shaped frame 5 is fixedly installed on the side where the two bracket baffles 3 are close to each other, and the number of U-shaped frames 5 is multiple. Multiple metal arc-extinguishing sheets 6 are respectively inserted into the corresponding U-shaped frames 5. The supporting mechanism made by using two bracket baffles 3, multiple bottom beams 4 and multiple U-shaped frames 5 can have good support performance, so that when the multiple metal arc-extinguishing sheets 6 are positioned and installed, the multiple metal arc-extinguishing sheets 6 can be stably supported without deformation.

[0029] The limiting mechanism includes a connecting rod 11 which is fixedly connected to one side of the two bracket baffles 3 respectively, a connecting ring 12 is rotatably sleeved on the connecting rod 11, a mounting plate 13 is fixedly installed on the top of the connecting ring 12, a pressure rod 14 is fixedly installed on one side of the mounting plate 13, the bottom of the pressure rod 14 is an arc surface structure, the pressure rod 14 is used to press and limit multiple metal arc-extinguishing sheets 6, and multiple arc-shaped stoppers 17 are fixedly installed at the bottom of the pressure rod 14 at equal intervals. The arc-shaped stopper 17 is located between two adjacent metal arc-extinguishing sheets 6, and the arc-shaped stopper 17 is used to press and limit the two adjacent metal arc-extinguishing sheets. The arc-extinguishing sheet 6 is supported for lateral limiting, and the same snap assembly is installed on the side where the two bracket baffles 3 are close to each other. The snap assembly is clamped with the pressure rod 14. After multiple metal arc-extinguishing sheets 6 are inserted into the corresponding U-shaped frame 5, the pressure rod 14 can be rotated to a horizontal state and placed on the multiple metal arc-extinguishing sheets 6. Multiple arc-shaped blocks 17 can be used to limit the position of two adjacent metal arc-extinguishing sheets 6 laterally, and when the pressure rod 14 presses the metal arc-extinguishing sheet 6, it can prevent it from detaching from the U-shaped frame 5, so that the metal arc-extinguishing sheet 6 can be stably supported and installed.

[0030] The buckle assembly includes a support rod 15 fixedly installed on one side of the two bracket baffles 3 close to each other, an arc groove is opened on the top of the support rod 15, and the bottom of the pressure rod 14 passes through the arc groove. Two inclined buckles 16 are symmetrically fixedly installed on the top of the support rod 15, and the two inclined buckles 16 are clamped with the pressure rod 14. After the pressure rod 14 is rotated to contact the inclined surfaces of the two inclined buckles 16, the two inclined buckles 16 can be pushed to bend to the side away from each other when the pressure rod 14 continues to rotate downward. After the pressure rod 14 presses multiple metal arc-extinguishing sheets 6, the two inclined buckles 16 will be located above the pressure rod 14, and can be elastically reset and move closer to each other, so as to achieve the clamping of the pressure rod 14, so as to limit the pressure rod 14, thereby braking and limiting the multiple metal arc-extinguishing sheets 6.

[0031] The present application can be used in the technical field of circuit breakers, and can also be used in other fields applicable to the present application.

[0032] Example 2

[0033] refer to Figure 4, improved on the basis of embodiment 1: a clamping mounting bracket for a molded case circuit breaker, which is applied to the technical field of circuit breakers, a clamping hole 7 is provided on the inner wall at the bottom of the U-shaped frame 5, and two elastic plates 9 arranged obliquely are symmetrically fixedly installed at the bottom of the metal arc-extinguishing piece 6, both of which penetrate the clamping hole 7, and arc-shaped protrusions 8 are fixedly installed at the bottom of the two elastic plates 9 on the side away from each other, and the arc-shaped protrusions 8 are clamped with the U-shaped frame 5. After the metal arc-extinguishing piece 6 is inserted into the corresponding U-shaped frame 5, the two arc-shaped protrusions 8 can be inserted into the clamping hole 7. At this time, under the limiting action of the inner wall of the clamping hole 7, the elastic plate 9 can be bent, and after the arc-shaped protrusion 8 moves to the bottom of the U-shaped frame 5, the elastic plate 9 can be restored, so that the arc-shaped protrusion 8 can be clamped with the U-shaped frame 5, so that the metal arc-extinguishing piece 6 can be preliminarily positioned.

[0034] The same arc-shaped spring sheet 10 is fixedly installed on one side where the two elastic plates 9 are close to each other. A buffer hole is opened on the arc-shaped spring sheet 10. The arc-shaped spring sheet 10 can be used to elastically support the two elastic plates 9, so that the arc-shaped protrusion 8 can be quickly restored after moving to the bottom of the U-shaped frame 5, to ensure that the arc-shaped protrusion 8 can be clamped with the bottom of the U-shaped frame 5.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A clamping mounting bracket for a molded case circuit breaker, comprising a circuit breaker body (1), a closing wrench (2) being mounted on the circuit breaker body (1), and a plurality of mounting brackets being arranged at equal intervals in the circuit breaker body (1), characterized in that: The mounting bracket also includes: A supporting mechanism, the supporting mechanism being installed in the circuit breaker body (1); A plurality of metal arc-extinguishing sheets (6), wherein the plurality of metal arc-extinguishing sheets (6) are mounted in the supporting mechanism at equal intervals; A limiting mechanism is installed on the supporting mechanism and is used to brake and limit a plurality of metal arc-extinguishing sheets (6).

2. The clamping mounting bracket for molded case circuit breaker according to claim 1, characterized in that: The support mechanism comprises two bracket baffles (3), the two bracket baffles (3) are arranged in the circuit breaker body (1), the same bottom beam (4) is fixedly installed on the bottom of the two bracket baffles (3) on the side close to each other, the number of the bottom beams (4) is multiple, the same U-shaped frame (5) is fixedly installed on the side close to each other of the two bracket baffles (3), the number of the U-shaped frames (5) is multiple, and the multiple metal arc-extinguishing sheets (6) are respectively inserted into the corresponding U-shaped frames (5).

3. The clamping mounting bracket for molded case circuit breaker according to claim 2, characterized in that: A clamping hole (7) is provided on the inner wall of the bottom of the U-shaped frame (5); two elastic plates (9) arranged in an inclined manner are symmetrically fixedly installed on the bottom of the metal arc-extinguishing sheet (6); the two elastic plates (9) both pass through the clamping hole (7); arc-shaped protrusions (8) are fixedly installed on the bottom of the two elastic plates (9) on the sides away from each other; the arc-shaped protrusions (8) are clamped with the U-shaped frame (5).

4. The clamping mounting bracket for molded case circuit breaker according to claim 3, characterized in that: The same arc-shaped spring sheet (10) is fixedly mounted on one side of the two elastic plates (9) close to each other, and a buffer hole is provided on the arc-shaped spring sheet (10).

5. The clamping mounting bracket for molded case circuit breaker according to claim 1, characterized in that: The limiting mechanism comprises a connecting rod (11) fixedly connected to the mutually adjacent sides of the two bracket baffles (3); a connecting ring (12) is rotatably sleeved on the connecting rod (11); a mounting plate (13) is fixedly mounted on the top of the connecting ring (12); a pressure rod (14) is fixedly mounted on one side of the mounting plate (13); the bottom of the pressure rod (14) is an arc surface structure; the pressure rod (14) is used to press and limit a plurality of metal arc extinguishing sheets (6); a plurality of arc-shaped stoppers (17) are fixedly mounted at equal intervals on the bottom of the pressure rod (14); the arc-shaped stoppers (17) are located between two adjacent metal arc extinguishing sheets (6); the arc-shaped stoppers (17) are used to provide lateral limiting support for the two adjacent metal arc extinguishing sheets (6); and a same buckle assembly is mounted on the mutually adjacent sides of the two bracket baffles (3); the buckle assembly is clamped with the pressure rod (14).

6. The clamping mounting bracket for molded case circuit breaker according to claim 5, characterized in that: The buckle assembly comprises a support rod (15) fixedly mounted on one side of the two support baffles (3) respectively, an arc groove is provided on the top of the support rod (15), the bottom of the pressure rod (14) passes through the arc groove, and two inclined buckles (16) are symmetrically fixedly mounted on the top of the support rod (15), and the two inclined buckles (16) are both clamped with the pressure rod (14).

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