Wiring terminal structure of molded case circuit breaker

Abstract

The invention provides a wiring terminal structure of a molded case circuit breaker, which belongs to the technical field of molded case circuit breakers, and comprises a wiring frame, a wiring board arranged at the lower end of the inner side of the wiring frame, a static contact arranged at one side of the lower end of the wiring board, a wire pressing plate arranged at the upper end of the inner side of the wiring frame, and guide blocks fixedly connected to two sides of the wire pressing plate, the guide block is slidably connected with the inner wall of the wiring frame, the upper end of the wiring frame is provided with a rotary pushing assembly, the outer side of the upper end of the rotary pushing assembly is provided with an anti-rotation assembly, and the anti-rotation assembly is provided with a dismounting auxiliary assembly. The wiring terminal structure solves the problems that in the use period of a wiring terminal structure of an existing molded case circuit breaker, rotation of a screwing piece is possibly caused by factors such as vibration, then a cable pressed by a cable pressing plate is loosened or falls off, stable installation of the cable cannot be ensured, the circuit breaker cannot be used normally, and the service life of the circuit breaker is prolonged. And even certain potential safety hazards are generated.

Description

Technical Field

[0001] This invention belongs to the technical field of molded case circuit breakers, and specifically relates to a wiring terminal structure for a molded case circuit breaker. Background Technology

[0002] Molded case circuit breakers (MCCBs) automatically disconnect current when the current exceeds the trip setting. "Molded case" refers to the use of a plastic insulator as the outer shell of the device to isolate conductors from grounded metal parts. MCCBs typically contain a thermomagnetic trip unit, while larger MCCBs are equipped with solid-state trip sensors. The terminals of a MCCB are electrical interface components installed at both ends (incoming / outgoing lines) of the MCCB, consisting of conductive copper busbars / clamps, an insulating shell, and fasteners, used to reliably connect the power / load lines to the main circuit of the circuit breaker.

[0003] Existing technology CN223757474U discloses a terminal structure for a molded case circuit breaker, comprising: a terminal frame having a terminal groove inside, and an arc-shaped segment formed at its bottom, the arc-shaped segment being bent upwards; a stationary contact including a terminal segment located on the arc-shaped segment, the terminal segment having an arc shape adapted to the arc-shaped segment, the opening of the terminal segment facing the terminal groove; a pressure plate located in the terminal groove, and having a tightening member on it, the tightening member being threadedly connected to the top of the terminal frame, the tightening member including a riveting part located in the terminal groove, the pressure plate having a through hole, the pressure plate being sleeved on the riveting part through the through hole and riveted to the riveting part, the pressure plate being vertically limited by the riveting part, and a gap between the through hole of the pressure plate and the outer periphery of the riveting part. The wiring terminal structure of this molded case circuit breaker uses a rotating tightening mechanism to move the pressure plate down until the cable is pressed tightly. However, it does not have an anti-rotation structure. During use, factors such as vibration may cause the tightening mechanism to rotate, which may cause the cable pressed by the pressure plate to loosen or fall off. This cannot ensure the stable installation of the cable, causing the circuit breaker to malfunction and even creating certain safety hazards. Summary of the Invention

[0004] This invention provides a wiring terminal structure for a molded case circuit breaker. Its purpose is to solve the problem that, during use, vibration and other factors may cause the tightening parts to rotate, resulting in the cable being loosened or falling off the clamping plate. This makes it impossible to ensure the stable installation of the cable, causing the circuit breaker to malfunction and even creating certain safety hazards.

[0005] This invention provides a terminal block structure for a molded case circuit breaker, comprising a wiring frame, a wiring plate mounted on the lower inner side of the wiring frame, a stationary contact mounted on one side of the wiring plate, a pressure plate mounted on the upper inner side of the wiring frame, guide blocks fixedly connected to both sides of the pressure plate, the guide blocks slidably connected to the inner wall of the wiring frame, a rotary propulsion assembly mounted on the upper end of the wiring frame, an anti-rotation assembly mounted on the outer side of the upper end of the rotary propulsion assembly, and a disassembly auxiliary assembly mounted on the anti-rotation assembly.

[0006] By adopting the above technical solution, when in use, the cable is inserted between the terminal block and the pressure plate. The rotating push assembly is rotated, and under the guidance of the guide block, the pressure plate is driven to move downward, thereby pressing the cable against the terminal block and the pressure plate. The cable is connected to the stationary contact through the terminal block. Furthermore, the installation of the anti-rotation component can prevent the rotating push assembly from rotating counterclockwise under vibration, thus preventing the cable from becoming loose or falling off, ensuring the stability of the cable connection. The installation of the disassembly auxiliary component can assist in rotating the rotating push assembly counterclockwise, thereby moving the pressure plate away from the cable and achieving the purpose of unlocking the cable.

[0007] Furthermore, a limiting opening is reserved at the lower end of the wiring frame, and a limiting post is fixedly connected to the lower end of the wiring board, with the limiting post engaging in the limiting opening.

[0008] By adopting the above technical solution, the terminal block is prevented from sliding in the terminal frame after the cable is compressed, thus ensuring the stability of the terminal block assembly.

[0009] Furthermore, the wire clamp has a flow groove that runs through both ends, and the side of the wire clamp near the terminal block has several anti-slip grooves, all of which are connected to the flow groove.

[0010] By adopting the above technical solution, the installation of the anti-slip groove can ensure the stability of the cable after it is clamped, prevent the cable from sliding between the terminal block and the clamping plate, and at the same time, through the cooperation of the anti-slip groove and the flow groove, the clamping point of the cable can be cooled down, avoiding the cable and terminal block from burning due to excessive temperature at the clamping point, thus ensuring service life.

[0011] Furthermore, the rotary propulsion assembly includes a threaded cylinder screwed onto the top of the wiring frame, with a threaded post threaded onto the inner side of the threaded cylinder, and the lower end of the threaded post connected to the upper wall of the pressure plate.

[0012] By adopting the above technical solution, when the cable is clamped, the cable is inserted between the connector plate and the clamping plate. The threaded cylinder is rotated, and under the action of the guide block, the threaded column is screwed out of the threaded cylinder, causing the clamping plate to move down. The clamping plate moves towards the cable and clamps the cable, thus achieving the clamping connection of the cable.

[0013] Furthermore, the anti-rotation assembly includes an outer ring fixed to the top of the wiring frame and a knob installed on the outside of the threaded cylinder. The lower end of the knob has a pre-reserved annular groove, and the outer ring is located inside the annular groove. The central axis of the outer ring, the central axis of the knob, and the central axis of the threaded cylinder coincide. A support is installed on the inner circumferential wall of the annular groove. An arc-shaped limiting block is screwed onto the inner side of the support. The arc-shaped limiting block can rotate clockwise inside the support. Torsion springs are sleeved on the shafts on both sides of the arc-shaped limiting block. Each side of the torsion spring is fixed to the support and the arc-shaped limiting block. A limiting plate is installed on one side of the arc surface of the arc-shaped limiting block. A limiting strip is installed on the arc surface of the arc-shaped limiting block. In the initial state, the limiting strip is tightly attached to the outer wall of the limiting plate under the action of the torsion spring.

[0014] By adopting the above technical solution, when the rotary propulsion component is rotated, the screw cylinder is driven to rotate counterclockwise via the knob, causing the screw post to move out of the screw cylinder. The knob pulls the arc-shaped limiting block on the support to rotate together. When the arc-shaped limiting block passes the limiting teeth, it rotates clockwise around the support under the action of the limiting teeth, thus allowing the arc-shaped limiting block to pass over the limiting teeth. This ensures that the screw cylinder can rotate counterclockwise, causing the screw post to unscrew out of the screw cylinder. When the arc-shaped limiting block moves to the gap between two adjacent limiting teeth, it quickly returns to its original position under the action of the torsion spring. Repeated rotation of the knob moves the screw post to the pressure plate, which can press the cable. During use, due to the cooperation of the limiting plate and the limiting strip, the arc-shaped limiting block can be prevented from rotating in the opposite direction, which in turn can prevent the knob from rotating in the opposite direction due to vibration and other factors. This effectively prevents the pressure plate from loosening under vibration and other environments, avoiding the situation where the pressed cable becomes loose or falls off.

[0015] Furthermore, a pair of steel balls are mirror-screwed onto the upper end of the outer ring. In the initial state, the upper end of the outer surface of the steel ball is in contact with the upper wall of the inner side of the ring groove on the knob, while the lower wall of the knob is separate from the upper wall of the wiring frame.

[0016] By adopting the above technical solution, when rotating the propulsion assembly, the resistance between the outer ring and the knob can be greatly reduced under the action of the steel ball, which not only reduces the wear of the outer ring and the knob, but also makes the knob rotate more smoothly.

[0017] Furthermore, the disassembly auxiliary component includes a square slot pre-drilled in the center of the knob and a pair of limiting slots pre-drilled on the outer wall of the outer ring. A square rod is slidably installed in the square slot. The lower end of the square rod is fixedly connected to the upper end of the threaded cylinder. The upper end of the square rod is connected to the upper end of the square slot via a spiral beryllium copper wire. A spiral beryllium copper wire is fixedly connected to the bottom wall of the limiting slot. The other side of the spiral beryllium copper wire is fixedly connected to a limiting seat. The limiting seat is slidably engaged in the limiting slot. The other side of the limiting seat is fixedly connected to a support block. In the initial state, the support block is compressed in the limiting slot under the action of the knob. In the disassembly state, the knob releases the compression of the support block. The support block pops out of the limiting slot and is supported at the lower end of the knob by the spiral beryllium copper wire. When the knob is placed on the upper end of the support block, the arc-shaped limiting block is completely moved above the limiting teeth, and then can be rotated counterclockwise to perform disassembly.

[0018] By adopting the above technical solution, when disassembling the cable, pulling the knob upwards causes the square rod to move out of the square slot. At this time, the first spiral beryllium copper wire extends. When the knob moves above the support block, with the cooperation of the second spiral beryllium copper wire, it pushes the limiting seat to move, causing one side of the support block to extend out of the limiting slot. At this time, releasing the knob, with the cooperation of the first spiral beryllium copper wire, positions the knob above the support block. At this time, the arc-shaped limiting block is above the limiting teeth, and the limiting teeth cancel their restraint on the arc-shaped limiting block. When the knob is in the limit position, it can be rotated in reverse. When the knob is rotated in reverse, the knob, through the cooperation of the square groove and the square rod, drives the threaded cylinder to rotate in reverse, which in turn causes the threaded column to retract into the threaded cylinder, and then causes the pressure plate to move up, thereby loosening the cable pressed between the terminal block and the pressure plate. At this time, the cable can be pulled out to disassemble the cable. When the knob is returned to its original position, the support block is pressed inward, causing the support block to retract into the limit groove. At this time, the knob moves downward under the action of the spiral beryllium copper wire, and then the knob returns to its original position.

[0019] Furthermore, the upper end of the support block is screwed with steel ball two, and the upper end of the outer surface of steel ball two can contact the lower surface of the knob during disassembly.

[0020] By adopting the above technical solution, the obstruction between the upper end of the support block and the lower end of the knob can be effectively reduced, which not only reduces the wear between the support block and the knob, but also makes the knob rotate more smoothly.

[0021] Furthermore, a pair of steel balls are mirror-screwed onto one side of the support block outside the limiting groove. During the rotational advancement of the threaded column, one side of the outer surface of the steel balls contacts the outer peripheral wall of the annular groove.

[0022] By adopting the above technical solution, the obstruction between the side wall of the support block and the outer circumferential surface of the ring groove on the knob can be effectively reduced, which can not only reduce the wear between the support block and the knob, but also make the knob rotate more smoothly.

[0023] The beneficial effects of this invention are as follows: 1. In use, the cable is inserted between the connector plate and the pressure plate. The rotating push assembly is rotated, and under the guidance of the guide block, the pressure plate is driven to move downward, thereby pressing the cable against the connector plate and the pressure plate. The cable is connected to the stationary contact through the connector plate. The anti-rotation component prevents the rotating push assembly from rotating counterclockwise under vibration, which could cause the cable to loosen or fall off, thus ensuring the stability of the cable connection. The disassembly auxiliary component assists in rotating the rotating push assembly counterclockwise, thereby moving the pressure plate away from the cable and unlocking the cable. 2. The anti-slip groove of this invention can ensure the stability of the cable after it is clamped, prevent the cable from sliding between the terminal block and the clamping plate. At the same time, through the cooperation of the anti-slip groove and the flow groove, the clamping point of the cable can be cooled down, avoiding the cable and terminal block from burning due to excessive temperature at the clamping point, thus ensuring service life.

[0024] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a cross-sectional structural diagram of an embodiment of the present invention. Figure 1 ; Figure 3 This is a schematic diagram of the limiting tooth distribution structure according to an embodiment of the present invention; Figure 4 This is an embodiment of the present invention. Figure 3 A magnified structural diagram at point A; Figure 5 This is a cross-sectional structural diagram of an embodiment of the present invention. Figure 2 ; Figure 6 This is an embodiment of the present invention. Figure 5 A magnified structural diagram at point B; Reference numerals: 1. Terminal frame; 2. Terminal block; 3. Stationary contact; 4. Wire clamp; 5. Guide block; 6. Rotary propulsion assembly; 7. Anti-rotation assembly; 8. Disassembly auxiliary assembly; 11. Limiting port; 21. Limiting post; 41. Flow groove; 42. Anti-slip groove; 61. Threaded cylinder; 62. Threaded post; 71. Outer ring; 72. Limiting tooth; 73. Support; 74. Arc-shaped limiting block; 75. Torsion spring; 76. Limiting plate; 77. Limiting strip; 78. Knob; 79. Steel ball one; 81. Square groove; 82. Square rod; 83. Spiral beryllium copper wire one; 84. Limiting groove; 85. Spiral beryllium copper wire two; 86. Limiting seat; 87. Support block; 88. Steel ball two; 89. Steel ball three. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0027] Reference Figures 1-6 This invention provides a terminal structure for a molded case circuit breaker, comprising a wiring frame 1, a wiring plate 2 mounted on the lower inner side of the wiring frame 1, a stationary contact 3 mounted on one side of the wiring plate 2, a pressure plate 4 mounted on the upper inner side of the wiring frame 1, guide blocks 5 fixedly connected to both sides of the pressure plate 4, the guide blocks 5 being slidably connected to the inner wall of the wiring frame 1, a rotary propulsion assembly 6 mounted on the upper end of the wiring frame 1, an anti-rotation assembly 7 mounted on the outer side of the upper end of the rotary propulsion assembly 6, and a disassembly auxiliary assembly 8 mounted on the anti-rotation assembly 7.

[0028] In use, insert the cable between the terminal block 2 and the pressure plate 4, rotate the rotary push assembly 6, and under the guidance of the guide block 5, drive the pressure plate 4 to move downward, thereby pressing the cable against the terminal block 2 and the pressure plate 4. The cable is connected to the stationary contact 3 through the terminal block 2. The anti-rotation assembly 7 prevents the rotary push assembly 6 from rotating counterclockwise under vibration, which could cause the cable to loosen or fall off, thus ensuring the stability of the cable connection. The disassembly auxiliary assembly 8 assists in rotating the rotary push assembly 6 counterclockwise, thereby moving the pressure plate 4 away from the cable and unlocking the cable.

[0029] The lower end of the wiring frame 1 has a reserved limiting port 11, and the lower end of the wiring plate 2 is fixedly connected to the limiting post 21. The limiting post 21 is engaged in the limiting port 11 to prevent the wiring plate 2 from sliding in the wiring frame 1 after the cable is compressed, thus ensuring the stability of the wiring plate 2 assembly.

[0030] The terminal block 2 and the wire clamping plate 4 have the same structure. In this embodiment, the wire clamping plate 4 is used as an example for explanation. The wire clamping plate 4 has a flow groove 41 that runs through both ends. On the side of the wire clamping plate 4 near the terminal block 2, there are several anti-slip grooves 42. All the anti-slip grooves 42 are connected to the flow groove 41. The installation of the anti-slip grooves 42 can ensure the stability of the cable after it is clamped and prevent the cable from sliding between the terminal block 2 and the wire clamping plate 4. At the same time, through the cooperation of the anti-slip grooves 42 and the flow grooves 41, the clamping point of the cable can be cooled down to avoid the cable and terminal burning due to excessive temperature at the clamping point, thus ensuring service life.

[0031] The rotary propulsion assembly 6 includes a threaded cylinder 61 screwed onto the top of the junction box 1. The inner side of the threaded cylinder 61 is threaded onto a threaded post 62. The lower end of the threaded post 62 is connected to the upper wall of the pressure plate 4. When the cable is pressed, the cable is inserted between the junction box 2 and the pressure plate 4. The threaded cylinder 61 is rotated. Under the action of the guide block 5, the threaded post 62 is screwed out of the threaded cylinder 61, causing the pressure plate 4 to move down. The pressure plate 4 moves toward the cable and presses the cable, thus achieving a pressing connection of the cable.

[0032] The anti-rotation assembly 7 includes an outer ring 71 fixed to the top of the wiring frame 1 and a knob 78 installed on the outside of the threaded cylinder 61. The lower end of the knob 78 has a pre-drilled annular groove. The outer ring 71 is located inside the annular groove. The central axis of the outer ring 71, the central axis of the knob 78, and the central axis of the threaded cylinder 61 coincide. A support 73 is installed on the inner circumferential wall of the annular groove. An arc-shaped limiting block 74 is screwed onto the inner side of the support 73. The arc-shaped limiting block 74 can rotate clockwise inside the support 73. The arc-shaped limiting block 74 has two sides... A torsion spring 75 is sleeved on the shaft. Both sides of the torsion spring 75 are fixed to the support 73 and the arc-shaped limiting block 74. A limiting plate 76 is installed on one side of the arc surface of the arc-shaped limiting block 74, and a limiting strip 77 is installed on the arc surface of the arc-shaped limiting block 74. In the initial state, the limiting strip 77 is tightly pressed against the outer wall of the limiting plate 76 under the action of the torsion spring 75. When the rotary propulsion assembly 6 is rotated, the threaded cylinder 61 is driven to rotate counterclockwise via the knob 78, causing the threaded column 62 to move out of the screw thread. When the threaded cylinder 61 is rotated, the knob 78 pulls the arc-shaped limiting block 74 on the support 73 to rotate together. When the arc-shaped limiting block 74 passes the limiting tooth 72, it rotates clockwise around the support 73 under the action of the limiting tooth 72, thus allowing the arc-shaped limiting block 74 to pass over the limiting tooth 72. This ensures that the threaded cylinder 61 can rotate. Counterclockwise rotation allows the threaded column 62 to unscrew from the threaded cylinder 61. When the arc-shaped limiting block 74 moves to the gap between two adjacent limiting teeth 72, the torsion spring 7... Under the action of 5, the arc-shaped limiting block 74 quickly returns to its original position. After repeatedly rotating the knob 78, the threaded column 62 moves to the wire pressing plate 4 to press the cable. During use, due to the cooperation of the limiting plate 76 and the limiting strip 77, the arc-shaped limiting block 74 can be prevented from rotating in the opposite direction. This can prevent the knob 78 from rotating in the opposite direction due to factors such as vibration. It can effectively prevent the wire pressing plate 4 from loosening under vibration and other environments, and avoid the cable from loosening or falling off after being pressed.

[0033] A pair of steel balls 79 are mirror-screwed to the upper end of the outer ring 71. In the initial state, the upper end of the outer surface of the steel balls 79 is in contact with the upper wall of the inner side of the ring groove on the knob 78, and the lower wall of the knob 78 is separated from the upper wall of the wiring frame 1. When rotating the rotary propulsion assembly 6, the resistance between the outer ring 71 and the knob 78 can be greatly reduced by the action of the steel balls 79. This not only reduces the wear of the outer ring 71 and the knob 78, but also makes the knob 78 rotate more smoothly.

[0034] The disassembly auxiliary component 8 includes a square groove 81 pre-drilled in the center of the knob 78 and a pair of limiting grooves 84 pre-drilled on the outer wall of the outer ring 71. A square rod 82 is slidably installed in the square groove 81. The lower end of the square rod 82 is fixedly connected to the upper end of the threaded cylinder 61, and the upper end of the square rod 82 is connected to the upper end of the square groove 81 via a spiral beryllium copper wire 83. A spiral beryllium copper wire 85 is fixedly connected to the bottom wall of the limiting groove 84. The other side of the spiral beryllium copper wire 85 is fixedly connected to a limiting seat 86. The limiting seat 86 is slidably engaged in the limiting groove 84. The other side of the limiting seat 86... The support block 87 is fixedly connected. In the initial state, under the action of the knob 78, the support block 87 is compressed into the limiting groove 84. In the disassembly state, the knob 78 releases the compression of the support block 87, and the support block 87 is ejected from the limiting groove 84 by the spiral beryllium copper wire 85 and supported by the lower end of the knob 78. When the knob 78 is placed on the upper end of the support block 87, the arc-shaped limiting block 74 is completely moved above the limiting tooth 72, and can then be rotated counterclockwise to perform disassembly. When disassembling the cable, pulling the knob 78 upwards causes the square rod 82 part to move out of the square... In groove 81, the spiral beryllium copper wire 83 extends. When knob 78 moves above support block 87, with the assistance of spiral beryllium copper wire 85, it pushes limit seat 86 to move, causing one side of support block 87 to extend out of limit groove 84. At this time, knob 78 is released, and with the assistance of spiral beryllium copper wire 83, knob 78 is positioned above support block 87. At this time, arc-shaped limit block 74 is above limit tooth 72, and limit tooth 72 cancels the limit on arc-shaped limit block 74. At this time, knob 78 can be rotated in reverse. When knob 78 is turned, the knob 78, through the cooperation of square groove 81 and square rod 82, drives threaded cylinder 61 to rotate in the opposite direction, which in turn causes threaded post 62 to retract into threaded cylinder 61, and then causes pressure plate 4 to move upward, thereby loosening the cable pressed between terminal block 2 and pressure plate 4. At this time, the cable can be pulled out to disassemble the cable. When knob 78 is returned to its original position, it presses the support block 87 inward, causing the support block 87 to retract into limiting groove 84. At this time, knob 78 moves downward under the action of spiral beryllium copper wire 83, and then knob 78 returns to its original position.

[0035] The upper end of the support block 87 is screwed with the second steel ball 88. The upper end of the outer surface of the second steel ball 88 can contact the lower surface of the knob 78 during disassembly, which can effectively reduce the obstruction between the upper end of the support block 87 and the lower end of the knob 78. This not only reduces the wear between the support block 87 and the knob 78, but also makes the knob 78 rotate more smoothly.

[0036] A pair of steel balls 89 are screwed onto the side of the support block 87 outside the limiting groove 84. During the rotation and advancement of the threaded column 62, one side of the outer surface of the steel balls 89 contacts the outer peripheral wall of the annular groove, which can effectively reduce the obstruction between the side wall of the support block 87 and the outer peripheral surface of the annular groove on the knob 78. This not only reduces the wear between the support block 87 and the knob 78, but also makes the knob 78 rotate more smoothly.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A wiring terminal structure for a molded case circuit breaker, comprising a wiring frame (1), characterized in that, A terminal block (2) is installed at the lower end of the inner side of the terminal frame (1). A stationary contact (3) is installed on one side of the terminal block (2). A pressure plate (4) is installed at the upper end of the inner side of the terminal frame (1). Guide blocks (5) are fixed on both sides of the pressure plate (4). The guide blocks (5) are slidably connected to the inner wall of the terminal frame (1). A rotary propulsion assembly (6) is installed at the upper end of the terminal frame (1). An anti-rotation assembly (7) is installed on the outer side of the upper end of the rotary propulsion assembly (6). A disassembly auxiliary assembly (8) is installed on the anti-rotation assembly (7).

2. The wiring terminal structure of a molded case circuit breaker according to claim 1, characterized in that: The lower end of the wiring frame (1) has a reserved limit port (11), and the lower end of the wiring board (2) is fixedly connected to the limit post (21), which is engaged in the limit port (11).

3. The wiring terminal structure of a molded case circuit breaker according to claim 1, characterized in that: The pressure plate (4) has a flow groove (41) that runs through both ends. The side of the pressure plate (4) close to the terminal block (2) has several anti-slip grooves (42), and the anti-slip grooves (42) are connected to the flow grooves (41).

4. The wiring terminal structure of a molded case circuit breaker according to claim 1, characterized in that: The rotary propulsion assembly (6) includes a threaded cylinder (61) screwed onto the top of the wiring frame (1), the inner side of the threaded cylinder (61) being threaded onto a threaded post (62), the lower end of the threaded post (62) being connected to the upper wall of the pressure plate (4).

5. The wiring terminal structure of a molded case circuit breaker according to claim 4, characterized in that: The anti-rotation assembly (7) includes an outer ring (71) fixed to the top of the wiring frame (1) and a knob (78) installed on the outside of the threaded cylinder (61). The lower end of the knob (78) has a pre-reserved annular groove. The outer ring (71) is located inside the annular groove. The central axis of the outer ring (71), the central axis of the knob (78) and the central axis of the threaded cylinder (61) coincide. A support (73) is installed on the inner circumferential wall of the annular groove. An arc-shaped limiting block (74) is screwed onto the inner side of the support (73). The arc-shaped limiting block (74) can be mounted on the support. (73) rotates clockwise on the inner side. Torsion springs (75) are sleeved on the shafts on both sides of the arc-shaped limiting block (74). The two sides of the torsion springs (75) are fixed to the support (73) and the arc-shaped limiting block (74). The support (73) is located on one side of the arc surface of the arc-shaped limiting block (74) and a limiting plate (76) is installed. A limiting strip (77) is installed on the arc surface of the arc-shaped limiting block (74). In the initial state, the limiting strip (77) is tightly attached to the outer wall of the limiting plate (76) under the action of the torsion spring (75).

6. The wiring terminal structure of a molded case circuit breaker according to claim 5, characterized in that: The upper end of the outer ring (71) is mirror-screwed with a pair of steel balls (79). In the initial state, the upper end of the outer surface of the steel ball (79) is in contact with the inner upper wall of the ring groove on the knob (78), and the lower wall of the knob (78) is separate from the upper wall of the wiring frame (1).

7. The wiring terminal structure of a molded case circuit breaker according to claim 6, characterized in that: The disassembly auxiliary component (8) includes a square groove (81) reserved in the center of the knob (78) and a pair of limiting grooves (84) reserved on the outer wall of the outer ring (71). A square rod (82) is slidably installed in the square groove (81). The lower end of the square rod (82) is fixedly connected to the upper end of the threaded cylinder (61). The upper end of the square rod (82) is connected to the upper end of the square groove (81) via a spiral beryllium copper wire (83). A spiral beryllium copper wire (85) is fixedly connected to the bottom wall of the limiting groove (84). The other side of the spiral beryllium copper wire (85) is fixedly connected to a limiting seat (86). The limiting seat (86) is slidably fastened. In the limiting groove (84), the other side of the limiting seat (86) is fixedly connected to the support block (87). In the initial state, under the action of the knob (78), the support block (87) is compressed in the limiting groove (84). In the disassembly state, the knob (78) cancels the compression of the support block (87), and the support block (87) pops out of the limiting groove (84) and is supported at the lower end of the knob (78) by the spiral beryllium copper wire II (85). When the knob (78) is placed on the upper end of the support block (87), the arc-shaped limiting block (74) is completely moved above the limiting tooth (72), and can then be rotated counterclockwise to perform disassembly.

8. The wiring terminal structure of a molded case circuit breaker according to claim 7, characterized in that: The upper end of the support block (87) is screwed to the second steel ball (88), and the upper end of the outer surface of the second steel ball (88) can contact the lower surface of the knob (78) during disassembly.

9. The wiring terminal structure of a molded case circuit breaker according to claim 8, characterized in that: The support block (87) is mirror-screwed to a pair of steel balls (89) on one side outside the limiting groove (84). During the rotational advance of the threaded column (62), one side of the outer surface of the steel balls (89) contacts the outer peripheral wall of the annular groove.

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