Moving contact assembly of molded case circuit breaker
By adopting a symmetrically arranged torsion spring and a reversely arranged torsion spring limit foot in the moving contact assembly, combined with the design of anti-shaking parts, the problem of damage or offset of the torsion spring position in the moving contact assembly is solved, and the stability of the movement of the moving contact and the smoothness of the contact are achieved.
Patent Information
- Application Number
- CN202420931793.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-04-30
AI Technical Summary
In the long-term use of existing moving contact components, due to frequent movement of the moving contact, the internal torsion spring position is easily damaged or offset, resulting in unbalanced force of the torsion spring when the moving contact is operated, affecting the smoothness and stability of the contact.
A movable contact assembly of a plastic shell circuit breaker is designed, which adopts a movable contact linkage, a movable contact, a torsion spring assembly and an anti-shaking member. The first spiral part and the second spiral part of the torsion spring are arranged symmetrically, and the torsion spring limiting foot and the driving part are arranged in reverse. The anti-shaking member is fixed to the movable contact linkage seat through a pin to prevent the movable contact from shaking left and right.
By symmetrically setting the torsion spring, the torsion spring bearing capacity is increased, and the triangular structure is more stable and not easily damaged; the anti-shaking parts effectively prevent the moving contact from left to right, so that the moving contact is stable and smooth.
Smart Images
Figure CN222637207U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a moving contact assembly of a molded case circuit breaker. Background Art
[0002] Traditional circuit breakers usually include a moving contact assembly, which includes a contact support member and at least one moving contact arranged on the contact support member. The moving contact and the contact support member are rotatably connected. By driving the contact support member to rotate, all moving contacts can be driven to move synchronously at the same time. A torsion spring is usually arranged between the moving contact and the contact support member. The torsion spring provides a certain elastic force for the moving contact, so that all moving contacts in the circuit breaker frame can maintain a good conductive contact effect with the static contact. During the use of the existing moving contact assembly, it is found that due to the frequent movement of the moving contact, the internal torsion spring is easily damaged or offset under the long-term action of impact and vibration, so that the torsion spring is unbalanced when the moving contact moves, and it is easy to swing slightly left and right, affecting the flatness and stability during contact. In view of this problem, the existing moving contact assembly is improved and optimized. Utility Model Content
[0003] In order to solve the above problems, the technical problem to be solved by the utility model is to provide a moving contact assembly of a molded case circuit breaker.
[0004] The technical solution adopted by the moving contact assembly of the molded case circuit breaker of the utility model: comprises a moving contact linkage seat, a moving contact arranged in the moving contact linkage seat, and a torsion spring assembly, characterized in that it also comprises an anti-sway part, the moving contact comprises a moving contact body, the end of the moving contact body is bent and extended to form a moving contact transition part and a moving contact external connection part connected to an external wiring terminal, the moving contact body is provided with a moving contact rotation opening near the moving contact transition part, the moving contact transition part is provided with a moving contact clamping block, the torsion spring assembly comprises a torsion spring and a connecting shaft, the torsion spring comprises a first spiral part of the torsion spring and a second spiral part of the torsion spring, The inner lead-out end of the first spiral part of the torsion spring and the inner lead-out end of the second spiral part of the torsion spring are connected together to form a torsion spring driving part, the outer end of the first spiral part of the torsion spring and the outer end of the second spiral part of the torsion spring are both provided with a torsion spring limiting foot which is arranged in the opposite direction to the torsion spring driving part, the first spiral part of the torsion spring and the second spiral part of the torsion spring are respectively provided with a first through hole of the torsion spring and a second through hole of the torsion spring with the same axis, the moving contact body is placed between the first spiral part of the torsion spring and the second spiral part of the torsion spring, and the torsion spring driving part is clamped on the moving contact clamping block;
[0005] The anti-sway member includes a front anti-sway member bracket, a rear anti-sway member bracket and an anti-sway member connecting portion, and an anti-sway member limiting opening is formed between the front anti-sway member bracket and the rear anti-sway member bracket to prevent the moving contact body from swaying left and right. The lower parts of the front anti-sway member bracket and the rear anti-sway member bracket are fixed to the moving contact linkage seat by pins.
[0006] The moving contact linkage seat is provided with a moving contact installation port and a linkage seat front limit groove for the anti-sway component installation limit. The moving contact linkage seat is provided with a pin penetration hole for the pin fixation on the inner wall of the linkage seat front limit groove.
[0007] The moving contact linkage seat is provided with a shaft insertion groove on the inner wall of the moving contact installation opening, and the connecting shaft passes through the first through hole of the torsion spring, the moving contact rotation opening and the second through hole of the torsion spring in sequence, and its two ends are placed in the shaft insertion groove.
[0008] The movable contact linkage seat is provided with a limiting foot installation groove for limiting the torsion spring limiting foot and a linkage seat limiting block for preventing the torsion spring limiting foot from moving left and right.
[0009] The moving contact rotation opening is a square structure.
[0010] The moving contact body is arranged above the pin.
[0011] The advantages of the moving contact assembly of the molded case circuit breaker of the present invention are: the first spiral portion of the torsion spring and the second spiral portion of the torsion spring are symmetrically arranged on both sides of the moving contact body, so that the force on the moving contact body is more balanced; the torsion spring limiting foot and the torsion spring driving part are arranged in opposite directions, so that the torsion spring has a greater bearing force and the triangular structure is more stable and not easy to be damaged; the anti-sway part plays a left and right limit when the moving contact is actuated, further preventing the moving contact from swinging during actuation, so that the moving contact can be stably and smoothly contacted. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0013] Figure 1 It is a structural schematic diagram of the movable contact assembly of the molded case circuit breaker of the utility model;
[0014] Figure 2 It is a structural schematic diagram of the movable contact of the utility model;
[0015] Figure 3 It is a structural schematic diagram of the torsion spring assembly of the utility model;
[0016] Figure 4 It is a structural schematic diagram of the torsion spring of the utility model;
[0017] Figure 5 It is a structural schematic diagram of the anti-swaying member of the utility model;
[0018] Figure 6 It is a structural schematic diagram of the movable contact linkage seat of the utility model. DETAILED DESCRIPTION
[0019] like Figure 1-6As shown, the utility model involves a moving contact assembly of a molded case circuit breaker, comprising a moving contact linkage seat 1, a moving contact 2 arranged in the moving contact linkage seat 1, a torsion spring assembly 3, and an anti-sway member 4, wherein the moving contact 2 comprises a moving contact body 6, the end of the moving contact body 6 is bent and extended to form a moving contact transition portion 7 and a moving contact external connection portion 8 connected to an external terminal, the moving contact body 6 is provided with a moving contact rotation opening 9 near the moving contact transition portion 7, and a moving contact block 10 is provided on the moving contact transition portion 7, the torsion spring assembly 3 comprises a torsion spring 11 and a connecting shaft 12, the torsion spring 11 comprises a first torsion spring spiral portion 14 and a second torsion spring spiral portion 15, the lead-out end in the first torsion spring spiral portion 14 and the lead-out end in the second torsion spring spiral portion 15 are connected together to form a torsion spring driven Part 19, the outer ends of the first spiral portion 14 of the torsion spring and the outer ends of the second spiral portion 15 of the torsion spring are both provided with a torsion spring limiting foot 18 which is arranged in the opposite direction to the torsion spring driving part 19, the first spiral portion 14 of the torsion spring and the second spiral portion 15 of the torsion spring are respectively provided with a first through hole 16 and a second through hole 17 of the torsion spring with the same axis, the moving contact body 6 is placed between the first spiral portion 14 of the torsion spring and the second spiral portion 15 of the torsion spring and the torsion spring driving part 19 is clamped on the moving contact block 10, the first spiral portion 14 of the torsion spring and the second spiral portion 15 of the torsion spring are symmetrically arranged on both sides of the moving contact body 6, so that the force on the moving contact body 6 is more balanced; the torsion spring limiting foot 18 is arranged in the opposite direction to the torsion spring driving part 19, so that the torsion spring can withstand greater force and the triangular structure is more stable and not easy to be damaged.
[0020] The anti-sway member 4 includes an anti-sway member front bracket 21, an anti-sway member rear bracket 22 and an anti-sway member connecting portion 23. An anti-sway member limiting opening 24 is formed between the anti-sway member front bracket 21 and the anti-sway member rear bracket 22 to prevent the moving contact body 6 from swaying left and right. The lower parts of the anti-sway member front bracket 21 and the anti-sway member rear bracket 22 are fixed to the moving contact linkage seat 1 by pins 25. The anti-sway member 4 acts as a left and right limit when the moving contact is actuated, further preventing the moving contact from swinging during actuation, and making the moving contact contact stable and smooth.
[0021] The moving contact linkage seat 1 is provided with a moving contact installation port 26 and a linkage seat front limit groove 27 for installing and limiting the anti-sway component 4. The moving contact linkage seat 1 is provided with a pin penetration hole 28 for fixing the pin 25 on the inner wall of the linkage seat front limit groove 27. The anti-sway component 4 is connected and positioned accurately and installed firmly.
[0022] The moving contact linkage seat 1 is provided with a shaft insertion groove 29 on the inner wall of the moving contact installation opening 26 , and the connecting shaft 12 passes through the first through hole 16 of the torsion spring, the moving contact rotation opening 9 and the second through hole 17 of the torsion spring in sequence, and its two ends are placed in the shaft insertion groove 29 .
[0023] The moving contact linkage seat 1 is provided with a limiting foot installation groove 30 for limiting the torsion spring limiting foot 18 and a linkage seat limiting block 31 for preventing the torsion spring limiting foot 18 from moving left and right, which can effectively prevent the torsion spring limiting foot 18 from swinging and make it more stable after installation.
[0024] The moving contact rotation opening 9 is a square structure.
[0025] The moving contact body 6 is arranged above the pin 25 .
[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention are included in the protection scope of the present invention.
Claims
1. A molded case circuit breaker moving contact assembly, comprising a moving contact linkage seat (1), a moving contact (2) arranged in the moving contact linkage seat (1), and a torsion spring assembly (3), characterized in that: The movable contact (2) further comprises an anti-swaying member (4), wherein the movable contact (2) comprises a movable contact body (6), the end of the movable contact body (6) is bent and extended to form a movable contact transition portion (7) and a movable contact external connection portion (8) connected to an external wiring terminal, the movable contact body (6) is provided with a movable contact rotation opening (9) near the movable contact transition portion (7), the movable contact transition portion (7) is provided with a movable contact clamping block (10), the torsion spring assembly (3) comprises a torsion spring (11) and a connecting shaft (12), the torsion spring (11) comprises a first torsion spring spiral portion (14) and a second torsion spring spiral portion (15), the lead-out end of the first torsion spring spiral portion (14) and the torsion spring The inner lead-out ends of the second spiral portion (15) are connected together to form a torsion spring driving portion (19); the outer ends of the first spiral portion (14) of the torsion spring and the outer ends of the second spiral portion (15) of the torsion spring are both provided with a torsion spring limiting foot (18) arranged in the opposite direction to the torsion spring driving portion (19); the first spiral portion (14) of the torsion spring and the second spiral portion (15) of the torsion spring are respectively provided with a first torsion spring through hole (16) and a second torsion spring through hole (17) having the same axis; the moving contact body (6) is disposed between the first spiral portion (14) of the torsion spring and the second spiral portion (15) of the torsion spring, and the torsion spring driving portion (19) is clamped on the moving contact clamping block (10); The anti-sway component (4) comprises an anti-sway component front bracket (21), an anti-sway component rear bracket (22) and an anti-sway component connecting portion (23); an anti-sway component limit opening (24) is formed between the anti-sway component front bracket (21) and the anti-sway component rear bracket (22) to prevent the movable contact body (6) from swaying left and right; the lower parts of the anti-sway component front bracket (21) and the anti-sway component rear bracket (22) are fixed to the movable contact linkage seat (1) by pins (25).
2. The moving contact assembly of a molded case circuit breaker according to claim 1, characterized in that: The movable contact linkage seat (1) is provided with a movable contact installation opening (26) and a linkage seat front limit groove (27) for installation and limiting of the anti-sway component (4); the movable contact linkage seat (1) is provided with a pin penetration hole (28) for fixing the pin (25) on the inner wall of the linkage seat front limit groove (27).
3. The moving contact assembly of the molded case circuit breaker according to claim 2, characterized in that: The movable contact linkage seat (1) is provided with a shaft insertion groove (29) on the inner wall of the movable contact mounting opening (26); the connecting shaft (12) passes through the first through hole (16) of the torsion spring, the movable contact rotation opening (9) and the second through hole (17) of the torsion spring in sequence, and then both ends of the connecting shaft (12) are placed in the shaft insertion groove (29).
4. The moving contact assembly of a molded case circuit breaker according to claim 1, characterized in that: The movable contact linkage seat (1) is provided with a limiting foot installation groove (30) for limiting the torsion spring limiting foot (18) and a linkage seat limiting block (31) for preventing the torsion spring limiting foot (18) from moving left and right.
5. The moving contact assembly of the molded case circuit breaker according to claim 1, characterized in that: The moving contact rotation opening (9) is a square structure.
6. The moving contact assembly of a molded case circuit breaker according to claim 1, characterized in that: The moving contact body (6) is arranged above the pin (25).