Circuit breaker
By using the design of controlling the movement of the U-shaped rod between the transition surface and the pressing surface in the circuit breaker, the problem that the existing circuit breaker cannot trip in time due to the lock and linkage plate stuck, and the smoothness of the U-shaped rod is achieved Improved safety of mobile and circuit breakers.
Patent Information
- Application Number
- CN202520060573.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-10
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2035-01-10
AI Technical Summary
When the existing circuit breaker is closed, the lock and linkage board may be stuck, resulting in the inability to trip in time, which poses safety hazards.
A circuit breaker is designed, which uses the distance between the transition surface and the pressing surface to control the movement of the U-shaped rod, and the fixing and release of the U-shaped rod is achieved through the linkage of the torsion spring and the tripping mechanism to avoid jamming.
The U-shaped rod is smoothly moved during closing and tripping, avoiding jamming and improving the safety and reliability of the circuit breaker.
Smart Images
Figure CN222507500U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a circuit breaker, in particular to a circuit breaker. Background Art
[0002] A circuit breaker is an electrical device used to protect an electrical circuit from damage caused by overload or short circuit. When the current in the circuit exceeds a predetermined safety value, the circuit breaker automatically cuts off the current to prevent potential fire or other electrical failures. Circuit breakers are widely used in homes, industries, and power transmission systems.
[0003] In current circuit breakers, the U-shaped part is fixed when the circuit breaker is closed by means of a lock and a linkage plate. However, the lock and the linkage plate may get stuck, resulting in failure to trip in time, posing a safety hazard. Utility Model Content
[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a circuit breaker.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: including a shell, a handle, a U-shaped rod, a linkage plate, a linkage torsion spring, a lock and a release mechanism, the handle is rotatably arranged in the shell, the linkage plate is rotatably arranged in the shell, a transverse groove and a longitudinal groove that are connected to each other are arranged on the linkage plate, a transition surface is arranged between the transverse groove and the longitudinal groove, the U-shaped rod has an active end that is linked with the handle and a driven end that is slidably arranged in the transverse groove or the longitudinal groove, the lock is rotatably arranged in the shell and arranged concentrically with the linkage plate, the lock is provided with a matching groove, and a pressing surface is provided at the top of the matching groove, and the rotating lock makes the pressing surface have a fixed state and a released state, the fixed state is that the distance between the pressing surface and the transition surface cannot allow the U-shaped rod to pass, the U-shaped rod is fixed in the longitudinal groove, and the released state is that the distance between the pressing surface and the transition surface is greater than the diameter of the U-shaped rod, and the U-shaped rod enters the transverse groove; the linkage torsion spring drives the linkage plate to rotate, and the release mechanism drives the lock to rotate and moves the pressing surface from the fixed state to the released state.
[0006] By adopting the above technical solution, when working, the handle is turned to close the switch, and the handle drives the U-shaped rod to move. At this time, the driven end of the U-shaped rod is located in the longitudinal groove, and the lock is in a fixed state, that is, the distance between the pressing surface and the transition surface cannot allow the U-shaped rod to pass through, and the U-shaped rod is fixed in the longitudinal groove. When tripping occurs, the tripping mechanism drives the lock to rotate, and at this time the pressing surface moves away from the transition surface, that is, the distance between the pressing surface and the transition surface becomes larger. Driven by the linkage torsion spring, due to the existence of the transition surface and the absence of other objects pressing on the other end, the U-shaped rod passes through and enters the transverse groove to complete the tripping. The movement of the U-shaped rod is controlled by controlling the distance between the transition surface and the pressing surface, and the existence of the transition surface prevents the U-shaped rod from getting stuck in the process of entering the transverse rod from the longitudinal rod.
[0007] The utility model is further configured as follows: it also includes a static contact and a moving contact, the static contact is arranged on the shell, the moving contact is arranged on the linkage plate, the handle has a closing position and an opening position, the closing position is that the U-shaped rod is located in the longitudinal groove, the pressing surface is in a fixed state, and the static contact is in contact with the moving contact; the opening position is that the U-shaped rod is located in the transverse groove, the pressing surface is in a released state, and the static contact is separated from the moving contact.
[0008] The utility model is further configured as follows: it also includes a fixed torsion spring, a fixed shaft is arranged on the shell, a linkage plate and a lock buckle are rotatably arranged on the fixed shaft, a linkage rod is arranged on the linkage plate, a fixed rod is arranged on the lock buckle, and the fixed torsion spring is arranged on the fixed shaft, one end of the fixed torsion spring is against the fixed rod, and the other end is against the linkage rod to form a fixed state in which the pressing surface rotates in the direction of the transition surface.
[0009] By adopting the above technical solution, after closing the switch, the fixed torsion spring will make the lock buckle always have a tendency to rotate clockwise, thereby ensuring that the pressing surface is always against the U-shaped rod, thereby preventing the U-shaped rod from entering the transverse groove.
[0010] The utility model is further configured as follows: the tripping mechanism further comprises a bimetallic sheet, the bimetallic sheet has a pushing portion, and the lock has a matching portion opposite to the pushing portion.
[0011] By adopting the above technical solution, when overloaded, the bimetallic strip is actuated, and the pushing part pushes the matching part, thereby causing the lock to rotate.
[0012] The utility model is further configured as follows: the linkage plate is provided with a blocking block and the blocking block is located on the moving track of the lock buckle; when the linkage plate abuts against the lock buckle, the pressing surface is in a fixed state.
[0013] By adopting the above technical solution, the setting of the blocking block ensures that the lock will not continue to rotate after it rotates to a suitable position. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a schematic diagram of the overall structure of the handle of the utility model when it is in the closed state;
[0015] Figure 2 This is a schematic diagram of the overall structure of the handle of the utility model when it is in the open position;
[0016] Figure 3 It is a structural schematic diagram of the linkage plate of the utility model;
[0017] Figure 4 It is a structural schematic diagram of the lock buckle of the utility model.
[0018] In the figure: 1. housing; 2. handle; 3. U-shaped rod; 31. active end; 32. driven end; 4. linkage plate; 41. transverse groove; 42. longitudinal groove; 43. transition surface; 44. blocking block; 5. linkage torsion spring; 6. lock; 61. matching groove; 62. pressing surface; 7. release mechanism; 71. pushing part; 72. matching part; 81. moving contact; 82. static contact; 9. fixed torsion spring; 91. fixed shaft; 92. fixed rod; 93. linkage rod. DETAILED DESCRIPTION
[0019] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0020] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0021] like Figure 1-4As shown, the utility model discloses a circuit breaker, including a housing 1, a handle 2, a U-shaped rod 3, a linkage plate 4, a linkage torsion spring 5, a lock 6 and a tripping mechanism 7, the handle 2 is rotatably arranged in the housing 1, the linkage plate 4 is rotatably arranged in the housing 1, the linkage plate 4 is provided with a transverse groove 41 and a longitudinal groove 42 that are interconnected, a transition surface 43 is provided between the transverse groove 41 and the longitudinal groove 42, the U-shaped rod 3 has an active end 31 that is linked with the handle 2 and a driven end 31 that is slidably arranged in the transverse groove 41 or the longitudinal groove 42 The locking buckle 6 is rotatably arranged in the housing 1 and is arranged concentrically with the linkage plate 4. The locking buckle 6 is provided with a matching groove 61. The top of the matching groove 61 has a pressing surface 62. The rotating locking buckle 6 makes the pressing surface 62 have a fixed state and a released state. The fixed state is that the distance between the pressing surface 62 and the transition surface 43 cannot allow the U-shaped rod 3 to pass through, and the U-shaped rod 3 is fixed in the longitudinal groove 42. The released state is that the distance between the pressing surface 62 and the transition surface 43 is greater than the diameter of the U-shaped rod 3, and the U-shaped rod 3 enters the transverse groove 4. 1; the linkage torsion spring 5 drives the linkage plate 4 to rotate, and the tripping mechanism 7 drives the lock buckle 6 to rotate and moves the pressing surface 62 from the fixed state to the released state. When working, the handle 2 is turned to close the switch, and the handle 2 drives the U-shaped rod 3 to move. At this time, the driven end 32 of the U-shaped rod 3 is located in the longitudinal groove 42, and the lock buckle 6 is in a fixed state, that is, the distance between the pressing surface 62 and the transition surface 43 cannot allow the U-shaped rod 3 to pass, and the U-shaped rod 3 is fixed in the longitudinal groove 42. When tripping occurs, the tripping mechanism 7 drives the lock buckle 6 rotates, and the pressing surface 62 moves away from the transition surface 43, that is, the distance between the pressing surface 62 and the transition surface 43 becomes larger. Driven by the linkage torsion spring 5, due to the existence of the transition surface 43 and the absence of other objects pressing on the other end, the U-shaped rod 3 passes through and enters the transverse groove 41, and the trip is completed. The movement of the U-shaped rod 3 is controlled by controlling the distance between the transition surface 43 and the pressing surface 62, and the existence of the transition surface 43 prevents the U-shaped rod 3 from getting stuck in the process of entering the transverse rod from the longitudinal rod.
[0022] It also includes a static contact 82 and a moving contact 81. The static contact 82 is arranged on the shell 1, and the moving contact 81 is arranged on the linkage plate 4. The handle 2 has a closing position and an opening position. The closing position is that the U-shaped rod 3 is located in the longitudinal groove 42, the pressing surface 62 is in a fixed state, and the static contact 82 is in contact with the moving contact 81; the opening position is that the U-shaped rod 3 is located in the transverse groove 41, the pressing surface 62 is in a released state, and the static contact 82 is separated from the moving contact 81.
[0023] It also includes a fixed torsion spring 9, a fixed shaft 91 is arranged on the shell 1, the linkage plate 4 and the lock buckle 6 are rotatably arranged on the fixed shaft 91, a linkage rod 93 is arranged on the linkage plate 4, a fixed rod 92 is arranged on the lock buckle 6, and the fixed torsion spring 9 is arranged on the fixed shaft 91. One end of the fixed torsion spring 9 is against the fixed rod 92, and the other end is against the linkage rod 93 to form a fixed state in which the pressing surface 62 rotates in the direction of the transition surface 43. After closing the switch, the fixed torsion spring 9 will make the lock buckle 6 always have a tendency to rotate clockwise, thereby ensuring that the pressing surface 62 is always against the U-shaped rod 3, thereby preventing the U-shaped rod 3 from entering the transverse groove 41.
[0024] The tripping mechanism 7 also includes a bimetallic strip having a pushing portion 71 , and the lock buckle 6 has a matching portion 72 opposite to the pushing portion 71 . When overloaded, the bimetallic strip is actuated, and the pushing portion 71 pushes the matching portion 72 , thereby causing the lock buckle 6 to rotate.
[0025] The linkage plate 4 is provided with a blocking block 44 and the blocking block 44 is located on the moving track of the lock buckle 6. When the linkage plate 4 and the lock buckle 6 are in contact, the pressing surface 62 is in a fixed state. The setting of the blocking block 44 ensures that the lock buckle 6 will not continue to rotate after rotating to a suitable position.
[0026] Working process: When working, turn the handle 2 to the closing position. During this process, the handle 2 drives the U-shaped rod 3 to move until the driven end 32 of the U-shaped rod 3 is located in the longitudinal groove 42, and the lock buckle 6 is in a fixed state, that is, the distance between the pressing surface 62 and the transition surface 43 cannot allow the U-shaped rod 3 to pass through. The U-shaped rod 3 is fixed in the longitudinal groove 42. When overloaded, the bimetallic strip is actuated. At this time, the pushing portion 71 pushes the matching portion 72, thereby causing the lock buckle 6 to rotate. At this time, the pressing surface 62 moves away from the transition surface 43, that is, the distance between the pressing surface 62 and the transition surface 43 becomes larger. Driven by the linkage torsion spring 5, due to the existence of the transition surface 43 and the absence of other objects pressing on the other end, the U-shaped rod 3 passes through and enters the transverse groove 41 to complete the tripping.
Claims
1. A circuit breaker, comprising a housing (1), a handle (2), a U-shaped rod (3), a linkage plate (4), a linkage torsion spring (5), a lock (6) and a tripping mechanism (7), characterized in that: The handle (2) is rotatably arranged in the housing (1), the linkage plate (4) is rotatably arranged in the housing (1), a transverse groove (41) and a longitudinal groove (42) which are connected to each other are arranged on the linkage plate (4), a transition surface (43) is arranged between the transverse groove (41) and the longitudinal groove (42), the U-shaped rod (3) has an active end (31) which is linked with the handle (2) and a driven end (32) which is slidably arranged in the transverse groove (41) or the longitudinal groove (42), the lock buckle (6) is rotatably arranged in the housing (1) and is arranged concentrically with the linkage plate (4), the lock buckle (6) is provided with a matching groove (61), and the top of the matching groove (61) is connected to the locking plate (61). The locking mechanism (6) is provided with a pressing surface (62), and the rotating lock buckle (6) enables the pressing surface (62) to have a fixed state and a released state. The fixed state is that the distance between the pressing surface (62) and the transition surface (43) is too small for the U-shaped rod (3) to pass through, and the U-shaped rod (3) is fixed in the longitudinal groove (42). The released state is that the distance between the pressing surface (62) and the transition surface (43) is greater than the diameter of the U-shaped rod (3), and the U-shaped rod (3) enters the transverse groove (41). The linkage torsion spring (5) drives the linkage plate (4) to rotate, and the release mechanism (7) drives the lock buckle (6) to rotate and enables the pressing surface (62) to move from the fixed state to the released state.
2. A circuit breaker according to claim 1, characterized in that: It also includes a stationary contact (82) and a moving contact (81), wherein the stationary contact (82) is arranged on the housing (1), and the moving contact (81) is arranged on the linkage plate (4); the handle (2) has a closing position and an opening position; in the closing position, the U-shaped rod (3) is located in the longitudinal groove (42), the pressing surface (62) is in a fixed state, and the stationary contact (82) and the moving contact (81) are in contact; in the opening position, the U-shaped rod (3) is located in the transverse groove (41), the pressing surface (62) is in a released state, and the stationary contact (82) and the moving contact (81) are separated.
3. A circuit breaker according to claim 1, characterized in that: The invention also comprises a fixed torsion spring (9), a fixed shaft (91) is arranged on the housing (1), a linkage plate (4) and a lock buckle (6) are rotatably arranged on the fixed shaft (91), a linkage rod (93) is arranged on the linkage plate (4), a fixed rod (92) is arranged on the lock buckle (6), and the fixed torsion spring (9) is arranged on the fixed shaft (91), one end of the fixed torsion spring (9) abuts against the fixed rod (92), and the other end abuts against the linkage rod (93), thereby forming a fixed state in which the pressing surface (62) rotates in the direction of the transition surface (43).
4. A circuit breaker according to claim 1, characterized in that: The release mechanism (7) further comprises a bimetallic strip, the bimetallic strip having a pushing portion (71), and the lock buckle (6) having a matching portion (72) opposite to the pushing portion (71).
5. A circuit breaker according to claim 1, characterized in that: The linkage plate (4) is provided with a blocking block (44) and the blocking block (44) is located on the moving track of the lock buckle (6); when the linkage plate (4) and the lock buckle (6) are in contact, the pressing surface (62) is in a fixed state.