An intelligent protective molded case circuit breaker

Abstract

The present invention relates to an intelligent protective molded case circuit breaker in the field of circuit protection, comprising a shell; a tripping mechanism is arranged in the shell, the tripping mechanism comprises an active contact, the active contact is clamped with a mounting strip, the mounting strip is slidably connected with a mounting cylinder, the mounting strip is fixedly connected with an inner gear ring slidably connected with an inner wall of the mounting cylinder through a sliding block, the inner gear ring is meshed with a driving cylinder through a transmission gear roller, a mounting column fixedly connected with the mounting cylinder is penetrated on the inner side of the driving cylinder, a torsion spring is sleeved on the mounting column, and a toggle handle extending to the outer side of the shell is fixedly connected to the outer side of the driving cylinder. The tripping mechanism of the present invention adopts a compact cylindrical mounting structure, cooperates with a torsion spring for compression and force storage, and adopts a gear rotation structure to achieve stable transmission and toggle, so that the structure of the tripping mechanism is more stable, has better reliability, obtains better impact resistance, and simplifies the assembly and debugging process.

Description

Technical Field

[0001] The invention relates to a circuit breaker, in particular to an intelligent protection type molded case circuit breaker applied in the field of circuit protection. Background Art

[0002] A circuit breaker is a switching device that can close, carry and interrupt current under normal circuit conditions and can close, carry and interrupt current under abnormal circuit conditions within a specified time. A circuit breaker is generally composed of a contact system, arc extinguishing system, operating mechanism, release, casing, etc.

[0003] The traditional circuit breaker release uses two pulling springs set at a certain angle to pull the locking plate, so that it generates traction forces in opposite directions when the switch handle is lifted and pulled down to position the handle, and at the same time, the locking plate is squeezed and triggered by the solenoid structure.

[0004] The traditional release structure requires multiple elastic parts, handles and locking plates to be connected and assembled. The structure of each part after assembly is loose. When falling or impacting occurs, the release structure is easy to disintegrate and fail. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the tripping structure components of the traditional circuit breaker are numerous and loosely connected, resulting in poor impact resistance.

[0006] To solve the above problems, the present invention provides an intelligent protective molded case circuit breaker, comprising a shell; a tripping mechanism is arranged in the shell, the tripping mechanism comprises an active contact, the active contact is clamped with a mounting strip, the mounting strip is slidably connected with a mounting cylinder, the mounting strip is fixedly connected with a sliding block extending into the mounting cylinder, the inner side of the sliding block is fixedly connected with an inner gear ring slidably connected to the inner wall of the mounting cylinder, the inner side of the inner gear ring is meshed with a transmission gear roller rotatably connected to the mounting cylinder, the inner side of the transmission gear roller is meshed with a driving cylinder rotatably connected to the mounting cylinder, the inner side of the driving cylinder is penetrated by a mounting column fixedly connected to the mounting cylinder, a torsion spring is sleeved on the mounting column, one end of the torsion spring is fixed to the inner wall of the driving cylinder and the other end is fixedly connected to the mounting column, the outer side of the driving cylinder is fixedly connected with a toggle handle extending to the outside of the shell; the mounting cylinder is plugged with a plug rod penetrating the inner gear ring, and the plug rod is connected with a solenoid mechanism.

[0007] In the above-mentioned intelligent protective molded case circuit breaker, a tripping mechanism with a cylindrical mounting structure is adopted to improve the impact resistance of the tripping mechanism while simplifying the assembly operation.

[0008] As a further improvement of the present application, a bimetallic strip electrically connected to the active contact through a wire is provided in the shell, a clamp is fixedly connected to the end of the bimetallic strip, a traction frame is hinged to the clamp, a swing rod is hinged to the upper end of the traction frame, a support frame fixedly connected to the mounting tube is hinged to the middle part of the swing rod, and a group of sliding columns fixedly connected to the plug-in rod are slidably clamped at the front end of the swing rod.

[0009] As a further improvement of the present application, the mounting cylinder is a hollow fan-shaped cylindrical structure and has a rectangular opening at one end, the toggle handle is nested in the rectangular opening, a buckle plate is clamped at the front end of the mounting cylinder, and a sliding groove for the sliding block to slide is provided on the circumferential side wall of the mounting cylinder, the sliding groove is an arc-shaped through groove, and the sliding block is an arc-shaped slider and is nested in the sliding groove.

[0010] As a further improvement of the present application, the mounting strip is an arc-shaped plate-like structure, and a clamping groove for clamping the active contact is opened on the front side of the mounting strip. The inner gear ring is an arc-shaped plate-like structure and slides against the inner wall of the mounting cylinder. The inner wall of the inner gear ring is provided with internal clamping teeth distributed evenly in a fan shape, and the outer wall of the driving cylinder is provided with external clamping teeth distributed evenly in an arc shape.

[0011] As a further improvement of the present application, an external plug hole is opened on the upper part of the installation tube, and an internal plug hole matching with the external plug hole is provided on the inner gear ring. In the locked state, the plug rod passes through the external plug hole and the internal plug hole in sequence.

[0012] As a further improvement of the present application, the drive cylinder is a hollow cylindrical structure, a mounting hole is provided in the drive cylinder which is connected to its inner cavity and for the mounting column to pass through, the torsion spring is nested in the drive cylinder, and the toggle handle is integrally formed with the drive cylinder.

[0013] As a further improvement of the present application, the solenoid mechanism includes a vertical cylinder and a spiral wire wound on the outside thereof, a magnet column is nested in the vertical cylinder, the magnet column is fixedly connected to the plug-in rod, and the upper end of the magnet column abuts against a limit spring nested in the vertical cylinder.

[0014] As a further improvement of the present application, a notch groove is provided at the front end of the swing rod for the insertion rod to pass through, and an inner groove is provided on the inner wall on the opposite side of the notch groove for the sliding column to slide.

[0015] To sum up, the tripping mechanism of the present invention adopts a compact cylindrical mounting structure, cooperates with a torsion spring for compression and force storage, and adopts a gear rotation structure to achieve stable transmission and shifting, so that the structure of the tripping mechanism is more stable, has better reliability, obtains better impact resistance, and simplifies the assembly and debugging process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention in this application;

[0017] Figure 2It is a schematic diagram of the internal structure of the shell in this application;

[0018] Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention in this application;

[0019] Figure 4 for Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0020] Figure 5 This is a schematic diagram of the assembly structure of the installation cylinder and the active contact in this application;

[0021] Figure 6 It is a schematic diagram of the explosion structure of the installation cylinder in this application;

[0022] Figure 7 It is a schematic diagram of the three-dimensional structure of the installation cylinder in this application;

[0023] Figure 8 It is a three-dimensional structural schematic diagram of the driving cylinder in this application;

[0024] Fig. 9 This is a schematic diagram of the assembly structure of the mounting strip and the inner gear ring in this application;

[0025] Fig.10 It is a schematic diagram of the assembly structure of the solenoid mechanism in this application;

[0026] Fig.11 This is a schematic diagram of the assembly structure of the swing arm in this application;

[0027] Fig.12 It is a schematic diagram of the three-dimensional structure of the swing rod in this application.

[0028] Description of the numbers in the figure:

[0029] 1. Shell; 2. Tripping mechanism; 3. Active contact; 4. Mounting strip; 401. Snap-in groove; 5. Sliding block; 6. Mounting cylinder; 601. Sliding groove; 602. External plug-in hole; 7. Internal gear ring; 701. Internal plug-in hole; 702. Internal snap-in teeth; 8. Transmission gear roller; 9. Driving cylinder; 901. Mounting hole; 902. External snap-in teeth; 10. Toggle handle; 11. Mounting column; 12. Torsion spring; 13. Plug-in rod; 14. Solenoid mechanism; 1401. Spiral wire; 1402. Vertical cylinder; 1403. Limit spring; 1404. Magnet column; 15. Bimetallic strip; 16. Clamp; 17. Traction frame; 18. Swing rod; 1801. Notch groove; 1802. Internal slide groove; 19. Support frame; 20. Sliding column. DETAILED DESCRIPTION

[0030] The following describes two implementation modes of the present application in detail with reference to the accompanying drawings.

[0031] The first implementation method:

[0032] Figure 1-10 An intelligent protective molded case circuit breaker is shown, comprising a shell 1; a tripping mechanism 2 is arranged in the shell 1, the tripping mechanism 2 comprises an active contact 3, the active contact 3 is clamped with a mounting strip 4, the mounting strip 4 is slidably connected with a mounting cylinder 6, the mounting strip 4 is fixedly connected with a sliding block 5 extending into the mounting cylinder 6, the inner side of the sliding block 5 is fixedly connected with an inner gear ring 7 slidably connected to the inner wall of the mounting cylinder 6, the inner side of the inner gear ring 7 is meshed with a transmission gear roller 8 rotatably connected to the mounting cylinder 6, the inner side of the transmission gear roller 8 is meshed with a driving cylinder 9 rotatably connected to the mounting cylinder 6, the inner side of the driving cylinder 9 is penetrated by a mounting column 11 fixedly connected to the mounting cylinder 6, a torsion spring 12 is sleeved on the mounting column 11, one end of the torsion spring 12 is fixed to the inner wall of the driving cylinder 9 and the other end is fixedly connected to the mounting column 11, and the outer side of the driving cylinder 9 is fixedly connected with a toggle handle 10 extending to the outside of the shell 1; the mounting cylinder 6 is plugged with a plug rod 13 penetrating the inner gear ring 7, and the plug rod 13 is connected to a solenoid mechanism 14.

[0033] Specifically, when a short circuit occurs in the circuit, the solenoid mechanism 14 drives the plug rod 13 to move upward, and the plug rod 13 disengages from the inner gear ring 7 and the mounting cylinder 6. Under the action of the compressed torsion spring 12, the drive cylinder 9 rotates, and the rotating drive cylinder 9 drives the inner gear ring 7 to rotate through the transmission gear roller 8. The inner gear ring 7 drives the mounting strip 4 to rotate through the sliding block 5, and the mounting strip 4 drives the active contact 3 to rotate, so that the active contact 3 disengages from the passive contact piece, thereby disconnecting the circuit.

[0034] The mechanical tripping structure of a traditional circuit breaker adopts a plurality of loosely connected mechanical structures including two tension springs, a toggle member, a locking plate, a handle, etc. The tripping mechanism 2 adopted in the technical solution disclosed in the present application adopts a compact cylindrical mounting structure, cooperates with a torsion spring for compression and force storage, and adopts a gear rotation structure to achieve stable transmission and toggle, so that the structure of the tripping mechanism 2 is more stable, has better reliability, has better impact resistance, and simplifies the assembly and debugging process.

[0035] See also Figure 6 and Figure 7 The installation tube 6 is a hollow fan-shaped cylindrical structure and has a rectangular opening at one end. The toggle handle 10 is nested in the rectangular opening, and a buckle plate is clamped at the front end of the installation tube 6.

[0036] Specifically, it is convenient to assemble components on the installation tube 6.

[0037] See also Figure 7 A sliding groove 601 for the sliding block 5 to slide is opened on the circumferential side wall of the mounting cylinder 6 . The sliding groove 601 is an arc-shaped through groove. The sliding block 5 is an arc-shaped sliding block and is nested in the sliding groove 601 .

[0038] Specifically, the mounting bar 4 and the inner gear ring 7 are connected by the sliding block 5 so that the two rotate synchronously.

[0039] See also Figure 6 and Fig. 9 The mounting bar 4 is an arc-shaped plate structure, and a clamping groove 401 for clamping the active contact 3 is opened on the front side of the mounting bar 4.

[0040] Specifically, it is convenient to realize the rapid installation of the active contact 3 .

[0041] See also Figure 8 and Fig. 9 The inner gear ring 7 is an arc-shaped plate-like structure and slides against the inner wall of the mounting tube 6. The inner wall of the inner gear ring 7 is provided with inner teeth 702 distributed evenly in a fan shape, and the outer wall of the driving tube 9 is provided with outer teeth 902 distributed evenly in an arc shape.

[0042] Specifically, the stable transmission of the tripping mechanism 2 is achieved through the inner gear ring 7 , the transmission gear roller 8 and the driving cylinder 9 .

[0043] See also Figure 7 and Fig. 9 An outer plug hole 602 is provided on the upper portion of the mounting tube 6, and an inner plug hole 701 matching with the outer plug hole 602 is provided on the inner gear ring 7. In the locked state, the plug rod 13 passes through the outer plug hole 602 and the inner plug hole 701 in sequence.

[0044] Specifically, when the toggle handle 10 is swung upward to close the circuit, the plug-in rod 12 is inserted into the outer plug-in hole 602 and the inner plug-in hole 701 to achieve locking.

[0045] See also Figure 6 and Figure 8 The driving cylinder 9 is a hollow cylindrical structure. A mounting hole 901 is provided in the driving cylinder 9 and communicated with the inner cavity thereof and for the mounting column 11 to pass through. The torsion spring 12 is nested in the driving cylinder 9 , and the toggle handle 10 is integrally formed with the driving cylinder 9 .

[0046] Specifically, the drive cylinder 9 is force-stored by the torsion spring 12. More specifically, when the handle 10 is pushed upward to close the circuit, the torsion spring 12 is twisted and compressed; when the plug-in rod 13 is disengaged, the compressed torsion spring 12 drives the drive cylinder 9 to rotate.

[0047] See also Fig.10 The solenoid mechanism 14 includes a vertical tube 1402 and a spiral wire 1401 wound on the outside thereof. A magnet column 1404 is nested in the vertical tube 1402 . The magnet column 1404 is fixedly connected to the plug-in rod 13 . The upper end of the magnet column 1404 abuts against a limit spring 1403 nested in the vertical tube 1402 .

[0048] Specifically, the limit spring 1403 maintains downward pressure on the magnet column 1404 , so that when the toggle handle 10 drives the driving cylinder 9 to rotate upward, it is convenient for the plug-in rod 13 to be inserted into the inner plug-in hole 701 .

[0049] Second implementation method:

[0050] Figure 2 and Figure 11-12 An intelligent protective molded case circuit breaker is shown. Based on the first embodiment, a bimetallic strip 15 electrically connected to the active contact 3 through a wire is provided in the housing 1, a clamp 16 is fixedly connected to the end of the bimetallic strip 15, the clamp 16 is hinged to a traction frame 17, a swing rod 18 is hinged to the upper end of the traction frame 17, a support frame 19 fixedly connected to the mounting cylinder 6 is hinged to the middle of the swing rod 18, and a group of sliding columns 20 fixedly connected to the plug-in rod 13 are slidably clamped at the front end of the swing rod 18.

[0051] Specifically, when the circuit is overloaded, the current in the bimetallic strip 15 increases and generates heat, causing the bimetallic strip 15 to deform. The bimetallic strip 15 drives the traction frame 17 to move through the clamp 16, and the traction frame 17 drives the swing rod 18 to swing. The swing rod 18 drives the plug-in rod 13 to move upward and disengage from the mounting tube 6, thereby disconnecting the circuit.

[0052] See also Fig.12 The front end of the swing rod 18 is provided with a notch groove 1801 for the insertion rod 13 to pass through, and the inner wall of the notch groove 1801 on the opposite side is provided with an inner sliding groove 1802 for the sliding column 20 to slide.

[0053] Specifically, the movement of the plug rod 13 is achieved by squeezing the sliding column 20 by the inner sliding groove 1802 .

[0054] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. An intelligent protective molded case circuit breaker, characterized in that: The invention comprises a housing (1); a release mechanism (2) is arranged in the housing (1); the release mechanism (2) comprises an active contact (3); the active contact (3) is clamped with a mounting strip (4); the mounting strip (4) is slidably connected to a mounting tube (6); the mounting strip (4) is fixedly connected to a sliding block (5) extending into the mounting tube (6); the inner side of the sliding block (5) is fixedly connected to an inner toothed ring (7) slidably connected to the inner wall of the mounting tube (6); the inner side of the inner toothed ring (7) is meshed with a transmission gear roller (8) rotatably connected to the mounting tube (6); the inner side of the transmission gear roller (8) is meshed with a The mounting cylinder (6) is rotatably connected to a driving cylinder (9); a mounting column (11) fixedly connected to the mounting cylinder (6) is passed through the inner side of the driving cylinder (9); a torsion spring (12) is sleeved on the mounting column (11); one end of the torsion spring (12) is fixed to the inner wall of the driving cylinder (9) and the other end is fixedly connected to the mounting column (11); a toggle handle (10) extending to the outside of the housing (1) is fixedly connected to the outer side of the driving cylinder (9); the mounting cylinder (6) is plugged with a plug rod (13) passing through an inner gear ring (7); the plug rod (13) is connected to a solenoid mechanism (14).

2. The intelligent protective molded case circuit breaker according to claim 1, characterized in that: A bimetallic strip (15) electrically connected to the active contact (3) via a wire is arranged in the housing (1), a clamp (16) is fixedly connected to the end of the bimetallic strip (15), a traction frame (17) is hinged to the clamp (16), a swing rod (18) is hinged to the upper end of the traction frame (17), a support frame (19) fixedly connected to the mounting cylinder (6) is hinged to the middle of the swing rod (18), and a group of sliding columns (20) fixedly connected to the plug rod (13) are slidably clamped at the front end of the swing rod (18).

3. The intelligent protective molded case circuit breaker according to claim 1, characterized in that: The installation tube (6) is a hollow fan-shaped cylindrical structure and has a rectangular opening at one end. The toggle handle (10) is nested in the rectangular opening. A buckle plate is clamped at the front end of the installation tube (6). A sliding groove (601) for the sliding block (5) to slide is opened on the circumferential side wall of the installation tube (6). The sliding groove (601) is an arc-shaped through groove. The sliding block (5) is an arc-shaped sliding block and is nested in the sliding groove (601).

4. The intelligent protective molded case circuit breaker according to claim 3, characterized in that: The mounting strip (4) is an arc-shaped plate-like structure, and a clamping groove (401) for clamping the active contact (3) is provided on the front side of the mounting strip (4). The inner tooth ring (7) is an arc-shaped plate-like structure and slides against the inner wall of the mounting cylinder (6). The inner wall of the inner tooth ring (7) is provided with inner clamping teeth (702) distributed in a fan-shaped manner and at equal intervals. The outer wall of the driving cylinder (9) is provided with outer clamping teeth (902) distributed in an arc-shaped manner and at equal intervals.

5. The intelligent protective molded case circuit breaker according to claim 4, characterized in that: The upper portion of the installation tube (6) is provided with an external plug hole (602), and the inner gear ring (7) is provided with an internal plug hole (701) that matches the external plug hole (602). In a locked state, the plug rod (13) sequentially passes through the external plug hole (602) and the internal plug hole (701).

6. The intelligent protective molded case circuit breaker according to claim 5, characterized in that: The driving cylinder (9) is a hollow cylindrical structure. A mounting hole (901) is provided in the driving cylinder (9) and is communicated with the inner cavity thereof and is passed through by the mounting column (11). The torsion spring (12) is nested in the driving cylinder (9). The toggle handle (10) and the driving cylinder (9) are integrally formed.

7. The intelligent protective molded case circuit breaker according to claim 1, characterized in that: The solenoid mechanism (14) comprises a vertical cylinder (1402) and a spiral wire (1401) wound on the outside thereof, a magnet column (1404) is nested in the vertical cylinder (1402), the magnet column (1404) is fixedly connected to the plug-in rod (13), and the upper end of the magnet column (1404) abuts against a limit spring (1403) nested in the vertical cylinder (1402).

8. The intelligent protective molded case circuit breaker according to claim 2, characterized in that: The front end of the swing rod (18) is provided with a notch groove (1801) for the insertion rod (13) to pass through, and the inner wall on the opposite side of the notch groove (1801) is provided with an inner sliding groove (1802) for the sliding column (20) to slide.

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