Dual position available plug-in auxiliary switch structure and frame circuit breaker

Abstract

The application discloses a double-position available external auxiliary switch structure and a frame circuit breaker in the technical field of low-voltage electrical components, and relates to the technical field of frame circuit breakers.The frame circuit breaker comprises a drawer seat and a circuit breaker body sliding in different positions in the drawer seat, side plates are fixedly connected to the two sides of the body, and an operating mechanism is fixedly installed on the body in the sliding direction of the body.A horizontal main shaft is arranged on the operating mechanism.The external auxiliary switch structure comprises an external auxiliary switch, the external auxiliary switch is slidingly installed outside the side plates of the drawer seat through a sliding structure and moves integrally with the circuit breaker body through a synchronous structure, and a driving structure is arranged between the external auxiliary switch and the main shaft, so that the circuit breaker body drives the contact in the external auxiliary switch to switch states in the connection position and the test position.The scheme solves the problem that the external auxiliary switch in the prior art cannot switch between the test position and the connection position or the switching is unreliable, and has the beneficial effect of improving reliability.

Description

Technical Field

[0001] This application relates to the field of low-voltage electrical components technology, specifically to an external auxiliary switch structure and frame circuit breaker that can be used in two positions. Background Technology

[0002] Currently, drawer-type frame circuit breakers with a frame current of 1600A typically have a maximum of six sets of internal auxiliary switches. When users require more auxiliary switch contacts, external auxiliary switches can be used. External auxiliary switches have the same function as internally configured auxiliary switches.

[0003] In existing technologies, external auxiliary switches can typically only switch synchronously with the main circuit when the main body of the drawer-type circuit breaker is in the connected position. When the main body is in the testing or maintenance position, the external auxiliary switch cannot switch synchronously, causing inconvenience. Some current solutions address this issue, such as incorporating a sliding plate that moves vertically within the extended auxiliary switch module. The sliding plate drives the components to complete the switch switching. However, this type of solution suffers from a problem where the force applied to the sliding plate does not extend beyond the guide point. The force creates a deflection torque on the sliding plate, which can prevent the sliding plate from moving vertically in extreme environments, making the switching unreliable. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this application provides an external auxiliary switch structure and frame circuit breaker that can be used in two positions, thereby solving the problems of the prior art being unable to switch synchronously with the main circuit in two positions or having unreliable switching.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A dual-position available external auxiliary switch structure is provided for a frame circuit breaker. The frame circuit breaker includes a drawer base and a circuit breaker body that slides in different positions within the drawer base. Side plates are fixedly connected to both sides of the body, and an operating mechanism is fixedly installed in the sliding direction of the body. A horizontal main shaft is provided on the operating mechanism. The dual-position available external auxiliary switch structure includes an external auxiliary switch. The external auxiliary switch is slidably installed on the outside of the drawer base side plate through a sliding structure provided between the external auxiliary switch and the drawer base side plate, and moves as a whole with the circuit breaker body through a synchronization structure between the external auxiliary switch and the body. A driving structure is provided between the external auxiliary switch and the main shaft, so that the circuit breaker body drives the contacts in the external auxiliary switch to switch states in both the connected position and the test position.

[0007] Preferably, the external auxiliary switch includes a mounting plate, the mounting plate including a plate-like structure parallel to the upper side panel of the drawer seat, the sliding structure including a horizontal groove opened on the plate-like structure of the mounting plate and a mounting seat vertically installed on the outer side of the drawer seat corresponding to the side of the external auxiliary switch, the mounting seat extending into the horizontal groove and sliding within the horizontal groove, so that the external auxiliary switch slides horizontally on the mounting seat on the side panel of the drawer seat through the horizontal groove of the mounting plate.

[0008] Preferably, the synchronization structure includes a limiting shaft fixedly mounted on the mounting plate, an outwardly flared protrusion correspondingly provided on the side plate of the main body, and a horizontally mounted spring. The limiting shaft is perpendicular to the plate-like structure of the mounting plate and passes inward through the clearance hole on the side plate of the drawer seat, abutting against the inner side of the protrusion from the circuit breaker connection position to the test position. The plate-like structure of the mounting plate is provided with a spring fixing structure in the connection position direction. The two ends of the spring are respectively fixed to the spring fixing structure of the mounting plate and the mounting base.

[0009] Preferably, the spring fixing structure uses an outward bend on the mounting plate structure.

[0010] Preferably, the drive structure includes a lever disposed at one end of the main shaft corresponding to the side of the external auxiliary switch, a drive shaft mounted on the external auxiliary switch, a shift fork, and a cantilever. The drive shaft is vertically mounted on the plate-like structure of the mounting plate and can rotate around its own axis. One end of the drive shaft passes inward through a clearance hole on the side plate of the drawer seat and is fitted with a shift fork perpendicular to it at the end. The lever is disposed at the end far from the main shaft with a rod end that extends into the fork arm of the shift fork, so that when the lever rotates, it drives the shift fork to rotate around the drive shaft. The other end of the drive shaft extends outward from the plate-like structure of the mounting plate and is fitted with a cantilever perpendicular to it at the end. The cantilever enables the circuit breaker body to drive the contact switching state of the external auxiliary switch in both the connected position and the test position.

[0011] Preferably, the drive shaft is perpendicular to the plate-like structure of the mounting plate via a bushing.

[0012] Preferably, the lever has a Z-shaped structure, with the end of the lever at the far main shaft being a cylinder. The cylinder is mounted on the Z-shaped structure surface of the lever at the far main shaft and is perpendicular to the lever fork. When the circuit breaker is in the connected position, the cylinder extends into the arc-shaped opening formed between the two fork arms of the lever.

[0013] Preferably, the drive structure further includes a reset structure that causes the cantilever to reset clockwise.

[0014] Preferably, the reset structure uses a torsion spring installed outside the bushing, with one end bent and hanging on the upper side of the cantilever, and the other end straight and abutting against the lower edge of the limiting shaft.

[0015] Based on the same inventive concept, this application also discloses a frame circuit breaker, including a drawer base and a circuit breaker body that slides in different positions within the drawer base. Side plates are fixedly connected to both sides of the body and an operating mechanism is installed and fixed in the sliding direction of the body. A horizontal main shaft is provided on the operating mechanism, and it also includes the aforementioned external auxiliary switch structure that is available in two positions.

[0016] Compared to existing technologies, this solution offers the following advantages: The dual-position usable external auxiliary switch structure and frame circuit breaker of this application allow for overall horizontal sliding, instead of the traditional structure where the external auxiliary switch is fixed to the side plate. When the circuit breaker body, including the operating mechanism, moves from the test position to the connected position, the circuit breaker body and the external auxiliary switch can be considered as a single unit moving back and forth. During this movement, the lever remains embedded inside the shift fork, and the rotation and downward pressure of the lever are transmitted to the shift fork in real time. The shift fork is fixed to the cantilever via a shaft within a bushing. During the cantilever rotation, the auxiliary switch state can be switched. Since there is no extreme situation caused by deflection torque as in existing technologies, and the unreliable switching problem caused by the force direction not exceeding the guide point is avoided, the external auxiliary switch can reliably and synchronously switch with the main circuit even when the frame circuit breaker body is in the connected or test / maintenance position, improving reliability and enriching user application scenarios. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the external auxiliary switch installed on the circuit breaker in the test position, according to one embodiment of the present solution.

[0018] Figure 2 This is a three-dimensional structural diagram of one embodiment of the main body of this solution. The black arrow indicates the direction of the main body from the test position to the connection position.

[0019] Figure 3 This is a three-dimensional structural diagram of the external auxiliary switch relative to the main body and drawer base when the main body is in the connected position according to one embodiment of this solution;

[0020] Figure 4 This is a three-dimensional structural diagram showing the relative positions of the mounting plate and the right side plate of the main body in the test position according to an embodiment of this solution;

[0021] Figure 5 This is a three-dimensional structural diagram of the main body of this embodiment when the auxiliary switch is attached to the outside of the test position.

[0022] Figure 6 This is a three-dimensional structural diagram of the main body of this embodiment, viewed from the inside of the external auxiliary switch when the body is in the test position;

[0023] Figure 7This is a three-dimensional structural diagram of the external auxiliary switch installed on the circuit breaker in one embodiment of the present solution, showing the main body at the connection position.

[0024] Among them, 1-body, 11-right side plate of body, 111-protrusion, 12-operating mechanism, 121-main shaft, 1211-lever, 12111-cylinder, 2-drawer seat, 21-right side plate, 211-mounting seat, 3-external auxiliary switch, 31-shift fork, 32-cantilever, 33-shaft sleeve, 34-mounting plate, 341-horizontal groove, 35-limiting shaft, 36-spring. Detailed Implementation

[0025] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0026] This application addresses the shortcomings of existing technologies by innovating upon the existing frame-type circuit breaker structure. The previously fixed external auxiliary switch is now a sliding switch, allowing the circuit breaker body to switch between connected and test positions. In this embodiment, the frame circuit breaker includes a drawer base 2 and a circuit breaker body 1 that slides within the drawer base at different positions. Side plates are fixedly connected to both sides of the body 1, and an operating mechanism 12 is fixedly mounted along the sliding direction of the body 1. A horizontal main shaft 121 is mounted on the operating mechanism 12. During the opening and closing process, the main shaft 121 moves according to… Figure 2 Rotate in the direction of the hollow arrow, and the circuit breaker body 1 moves in the direction of the solid arrow.

[0027] The dual-position usable external auxiliary switch structure in this application includes an external auxiliary switch 3. The external auxiliary switch 3 is slidably installed on the outside of the drawer seat 2 side plate through a sliding structure between the external auxiliary switch 3 and the drawer seat 2 side plate, and moves as a whole with the circuit breaker body 1 through a synchronization structure between the external auxiliary switch 3 and the body 1. A driving structure is provided between the external auxiliary switch 3 and the main shaft 121, so that the circuit breaker body 1 drives the contacts in the external auxiliary switch 3 to switch states in both the connection position and the test position.

[0028] In this embodiment, the external auxiliary switch 3 is installed on the right side of the entire circuit breaker, specifically on the outer side of the right side panel 21 of the drawer seat 2. The external auxiliary switch 3 includes a mounting plate 34, which has a plate-like structure parallel to the upper side panel of the drawer seat 2. The sliding structure includes three long horizontal grooves 341 formed in the plate-like structure of the mounting plate 34 and three mounting seats 211 vertically installed on the outer side of the right side panel 21 of the drawer seat 2. Two of the three long horizontal grooves 341 are positioned above the other, and the three mounting seats 211 are positioned correspondingly two above and one below. The mounting seats 211 extend into the horizontal grooves 341 and slide within them, allowing the external auxiliary switch 3 to slide horizontally on the mounting seats 211 on the side panel of the drawer seat 2 via the horizontal grooves 341 of the mounting plate 34. The implementation of the sliding structure is not limited to the method described in this embodiment; other forms, such as adding sliding guide rails at the top and bottom, can also be used.

[0029] The synchronization structure can be fixedly connected or assembled between the two. However, in order to facilitate the removal of the main body 1 from the drawer seat 2 and keep the external auxiliary switch 3 on the outside of the right side plate 21 of the drawer seat 2, the synchronization structure uses the following preferred embodiment. The synchronization structure includes a limiting shaft 35 fixedly installed on the mounting plate 34, an outwardly folding protrusion 111 correspondingly provided on the side plate of the main body 1, and a horizontally installed spring 36. In this embodiment, the outwardly folding protrusion 111 is located at the rear edge of the right side plate 11 of the main body. The limiting shaft 35 is perpendicular to the plate structure of the mounting plate 34 and passes inward through the clearance hole on the right side plate 21 of the drawer seat 2, abutting the inside of the protrusion 111 from the front. The plate structure of the mounting plate 34 is provided with a spring fixing structure in the connection position direction. The two ends of the spring 36 are respectively fixed to the spring fixing structure of the mounting plate 34 and the mounting seat 211. The spring fixing structure uses the outward bend at the lower front of the plate structure of the mounting plate 34, or it can be a separate fixing post. When the external auxiliary switch 3 is in the test position, the limiting shaft 35 of the external auxiliary switch 3 is in contact with the bent protrusion 111 on the right side plate 11 of the main body. When the external auxiliary switch 3 is in the connection position, due to the action of the spring 36, the limiting shaft 36 of the external auxiliary switch 3 is tightly fitted with the bent protrusion 111 on the right side plate 11 of the main body. Figure 2 As the solid arrow points in the direction of the main body 1 from the test position to the connection position, the protrusion 111 pushes the limiting shaft 35 of the external auxiliary switch 3.

[0030] The drive structure described in this embodiment includes a lever 1211 located at the right end of the main shaft 121, a drive shaft mounted on the external auxiliary switch 3, a shift fork 31, and a cantilever 32. The drive shaft is vertically mounted on the plate-like structure of the mounting plate 34 and can rotate around its own axis. One end of the drive shaft passes inward through a clearance hole on the right side plate 21 of the drawer seat 2 and has a shift fork 31 mounted perpendicularly thereto at its end. The end of the lever 1211 far from the main shaft 121 has a rod end that extends into the fork arm of the shift fork 31, causing the shift fork 31 to rotate around the drive shaft when the lever 1211 rotates. The other end of the drive shaft extends outward from the plate-like structure of the mounting plate 34 and has a cantilever 32 mounted perpendicularly thereto at its end. The cantilever 32 drives the contacts in the external auxiliary switch 3 to switch states in both the connected position and the test position of the circuit breaker body 1. In this embodiment, the end of the cantilever 32 far from the drive shaft is connected to a connecting rod, and the state switching output is achieved by pressing the contacts installed in the external auxiliary switch 3 through a pressure plate that can move up and down on the connecting rod. In this embodiment, the drive shaft is perpendicular to the plate-like structure of the mounting plate 34 via the bushing 33. Other structures such as bearings can also be used.

[0031] To ensure smooth entry and exit of the lever 1211 into the fork 31, the lever 1211 in this embodiment has a Z-shaped structure, with its distal end (far from the main shaft 121) being a cylinder 12111. This cylinder 12111 is mounted on the Z-shaped surface of the lever 1211 far from the main shaft 121 and is perpendicular to the fork 31. When the circuit breaker is in the connected position, the cylinder 12111 extends into the arc-shaped opening formed between the two forks of the fork 31. In the test or connected position, the cylinder 12111 engages with the fork 31 of the external auxiliary switch 3. As the main shaft 121 and the lever 1211 rotate, they cause the fork 31 of the external auxiliary switch 3 to rotate as well.

[0032] The drive structure also includes a reset structure, which resets the cantilever 32 clockwise. During reset, the cantilever 32 pulls down the connecting rod to move the pressure plate away from the contact point. In this embodiment, the lower edge of the cantilever 32 is limited by the limiting shaft 35, that is, the limiting shaft 35 simultaneously serves as a limiting function for different parts in both the synchronization structure and the reset structure of the drive structure.

[0033] In this embodiment, the reset structure uses a torsion spring mounted outside the bushing 33. One end of the spring is bent and hangs on the upper side of the cantilever 32, while the other end is straight and rests against the lower edge of the limiting shaft 35. Other methods can also be used for the reset structure, such as installing a tension spring at the bottom.

[0034] Based on the same inventive concept, this application also discloses a frame circuit breaker, including a drawer base 2 and a circuit breaker body 1 that slides in different positions within the drawer base. Side plates are fixedly connected to both sides of the body 1, and an operating mechanism 12 is installed and fixed in the sliding direction of the body 1. A horizontal main shaft 121 is provided on the operating mechanism 12. The frame circuit breaker also includes the aforementioned external auxiliary switch structure that is available in two positions.

[0035] In this specification, the schematic diagrams in the accompanying drawings highlight the main features and key parts, and details are appropriately simplified or omitted. Therefore, they do not represent actual scale and size relationships. The terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0036] The above description is only a preferred embodiment of the present solution, but the scope of protection claimed by the present solution is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and inventive concept of this application, should be included within the scope of protection of this application.

Claims

1. A dual-position available external auxiliary switch structure for a frame circuit breaker, the frame circuit breaker comprising a drawer base (2) and a circuit breaker body (1) sliding in different positions within the drawer base, side plates fixedly connected to both sides of the body (1) and an operating mechanism (12) fixedly mounted in the sliding direction of the body (1), the operating mechanism (12) being provided with a horizontal main shaft (121), characterized in that: The circuit breaker includes an external auxiliary switch (3). The external auxiliary switch (3) is slidably installed on the outside of the drawer seat (2) side plate through a sliding structure between the external auxiliary switch (3) and the drawer seat (2) side plate. It moves as a whole with the circuit breaker body (1) through a synchronous structure between the external auxiliary switch (3) and the main body (1). A driving structure is provided between the external auxiliary switch (3) and the main shaft (121) so that the circuit breaker body (1) drives the contacts in the external auxiliary switch (3) to switch states in both the connection position and the test position.

2. The external auxiliary switch structure available in dual positions according to claim 1, characterized in that: The external auxiliary switch (3) includes a mounting plate (34), which has a plate-like structure parallel to the upper side panel of the drawer seat (2). The sliding structure includes a horizontal groove (341) on the plate-like structure of the mounting plate (34) and a mounting seat (211) vertically mounted on the outer side of the side panel of the drawer seat (2) corresponding to the external auxiliary switch (3). The mounting seat (211) extends into the horizontal groove (341) and slides within the horizontal groove (341), so that the external auxiliary switch (3) slides horizontally on the mounting seat (211) on the side panel of the drawer seat (2) through the horizontal groove (341) of the mounting plate (34).

3. The external auxiliary switch structure available in dual positions according to claim 2, characterized in that: The synchronization structure includes a limiting shaft (35) fixedly installed on the mounting plate (34), an outwardly folded protrusion (111) correspondingly provided on the side plate of the body (1), and a horizontally installed spring (36). The limiting shaft (35) is perpendicular to the plate structure of the mounting plate (34) and passes inward through the clearance hole on the side plate of the drawer seat (2) from the circuit breaker connection position to the test position, abutting against the inside of the protrusion (111). The plate structure of the mounting plate (34) is provided with a spring fixing structure in the connection position direction. The two ends of the spring (36) are respectively fixed on the spring fixing structure of the mounting plate (34) and the mounting seat (211).

4. The external auxiliary switch structure available in dual positions according to claim 3, characterized in that: The spring fixing structure uses an outward bend on the plate structure of the mounting plate (34).

5. The external auxiliary switch structure available in dual positions according to claim 3, characterized in that: The drive structure includes a lever (1211) provided at one end of the main shaft (121) corresponding to the side of the external auxiliary switch (3), a drive shaft, a shift fork (31) and a cantilever (32) mounted on the external auxiliary switch (3). The drive shaft is vertically mounted on the plate structure of the mounting plate (34) and can rotate around its own axis. One end of the drive shaft passes inward through the clearance hole on the side plate of the drawer seat (2) and a shift fork (31) perpendicular to it is installed at the end. The end of the lever (1211) far from the main shaft (121) is provided with a rod end that extends into the fork arm of the shift fork (31) so that when the lever (1211) rotates, it drives the shift fork (31) to rotate around the drive shaft. The other end of the drive shaft extends out of the outside of the plate structure of the mounting plate (34) and a cantilever (32) perpendicular to it is installed at the end. The cantilever (32) drives the contact switching state of the external auxiliary switch (3) in both the connection position and the test position of the circuit breaker body (1).

6. The external auxiliary switch structure available in dual positions according to claim 5, characterized in that: The drive shaft is perpendicular to the plate-like structure of the mounting plate (34) via a bushing (33).

7. The external auxiliary switch structure available in dual positions according to claim 5, characterized in that: The lever (1211) has a Z-shaped structure, and the end of the lever (121) far from the main shaft (121) is a cylinder (12111). The cylinder (12111) is installed on the Z-shaped structure surface of the lever (121) far from the main shaft (121) and is perpendicular to the shift fork (31). When the circuit breaker is in the connected position, the cylinder (12111) extends into the arc-shaped opening formed between the two forks of the shift fork (31).

8. The external auxiliary switch structure available in dual positions according to claim 6, characterized in that: The drive structure also includes a reset structure that resets the cantilever (32) clockwise.

9. The external auxiliary switch structure available in dual positions according to claim 8, characterized in that: The reset structure uses a torsion spring installed outside the bushing (33), with one end bent and hanging on the upper side of the cantilever (32), and the other end straight and abutting against the lower edge of the limiting shaft (35).

10. A frame circuit breaker, comprising a drawer base (2) and a circuit breaker body (1) sliding at different positions within the drawer base, wherein side plates are fixedly connected to both sides of the body (1) and an operating mechanism (12) is fixedly mounted on the body (1) in the sliding direction, and a horizontal main shaft (121) is provided on the operating mechanism (12), characterized in that: It also includes the dual-position available external auxiliary switch structure as described in any one of claims 1 to 9.

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