Circuit breaker fast closing mechanism
By incorporating a rapid closing mechanism with buffer and energy storage components in the circuit breaker, the problem of equipment damage caused by excessive load during the closing process is solved, enabling the circuit breaker to respond quickly and stably under high-intensity loads, and improving the reliability and safety of closing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DELIXI ELECTRIC
- Filing Date
- 2025-06-06
- Publication Date
- 2026-06-23
Smart Images
Figure CN224400337U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of circuit breaker technology, and more specifically to a circuit breaker quick-closing mechanism. Background Technology
[0002] In existing low-voltage circuit breakers, the closing operation requires manual operation of the handle mechanism, which in turn drives the moving contact mechanism to close the circuit.
[0003] However, during the closing process, when faced with a sudden increase in load, such as the starting of a motor or the use of other high-current equipment, the equipment may be damaged or the power system may become unstable due to excessive load. At the same time, the circuit breaker may be damaged due to overload or short circuit, affecting the safety of the circuit breaker itself.
[0004] Therefore, there is an urgent need to propose a fast closing structure to control and optimize the closing speed of circuit breakers in order to solve the problems existing in the current technology. Utility Model Content
[0005] The purpose of this application is to provide a circuit breaker fast closing mechanism that can ensure the rapid connection of the contact assembly when closing, thereby improving the closing effect and reliability of the product.
[0006] In a first aspect, embodiments of this application provide a circuit breaker quick-closing mechanism. The circuit breaker includes a housing, and the quick-closing mechanism includes a handle, a support member, a moving contact, an energy storage member, and a buffer member. The handle, support member, moving contact, and buffer member are all rotatably connected to the housing. The support member is throttlely connected to the handle. A first latching portion is provided on the moving contact. The energy storage member is simultaneously connected to both the support member and the moving contact.
[0007] The buffer is rotatably connected to the housing. The buffer includes an integrally formed elastic part and a second buckle part. The elastic part and the second buckle part are disposed opposite to each other on both sides of the rotation center of the buffer. The elastic part can provide an elastic preload to maintain the relative locking of the first buckle part and the second buckle part.
[0008] During the circuit breaker closing process, the handle drives the support to rotate, which in turn drives the moving contact to rotate via the energy storage device. Then, the buffer locks the moving contact, and the support moves relative to the moving contact, allowing the energy storage device to store energy. As the handle continues to rotate, the first and second latches can be unlocked, the energy storage device stops storing energy and quickly resets, causing the moving contact to rotate rapidly to the closed position.
[0009] Based on the embodiments described above, by incorporating a buffer in the circuit breaker, the position of the moving contact can be locked during the closing process, preventing the moving contact from prematurely rotating to the closed position and affecting the safety of the circuit and load. Simultaneously, energy is stored in the energy storage device during the closing process, so that the stored energy can be released in the final stage of closing to achieve rapid closure of the moving contact. This configuration ensures that the circuit breaker can respond quickly and stably to sudden, high-intensity load impacts, thereby protecting the circuit and equipment from damage.
[0010] In some examples, the buffer also includes an integrally formed first arm, a rotating part, and a second arm. The rotating part is rotatably connected to the housing. The first and second arms are located on different sides of the rotating part. An elastic part is located on the first arm, and a second latching part is located on the side of the second arm closer to the first latching part. The elastic part provides an elastic preload force that acts on the first arm. The elastic part can drive the rotating part to rotate through the first arm, and through the rotating part, drive the second arm to abut against the first latching part.
[0011] Based on the embodiments described above, the one-piece molded buffer effectively reduces the number of parts in the circuit breaker's fast-closing mechanism, facilitating assembly into the circuit breaker housing and improving space utilization within the housing. Furthermore, the one-piece molded buffer exhibits high structural stability, utilizing its elastic portion to enhance the stability of the locking mechanism with the moving contact. This prevents the locking fit between the buffer and the moving contact from failing, thereby improving the reliability of the circuit breaker's fast-closing mechanism.
[0012] In some examples, the buffer also includes a receiving part, and a pushing part is provided on the handle. The receiving part is located on the rotation path of the pushing part. During the rotation of the handle, the pushing part can push against the receiving part so that the receiving part can drive the first buckle part and the second buckle part to unlock.
[0013] Based on the above embodiments of this application, the setting of the pushing part and the receiving part can directly drive the buffer to move during the rotation of the handle, so as to unlock the first buckle and the second buckle. The transmission method is simple and efficient, eliminating the need for a transmission structure, which helps to reduce space occupation and production costs.
[0014] In some examples, the receiving part is located on the first arm, and the receiving part and the elastic part are located on opposite sides of the first arm. During the rotation of the handle, the pushing part exerts a thrust on the receiving part on the first arm, and the direction of the thrust is opposite to the direction of the elastic preload.
[0015] Based on the above embodiments of this application, by setting the receiving part on the first arm, the buffer can be formed as a lever-like structure. During the rotation of the handle, the pushing part pushes against the receiving part, and the first buckle part and the second buckle part are unlocked by utilizing the lever-like structure of the buffer. It has the characteristics of simple structure, efficient and stable cooperation.
[0016] In some examples, the elastic portion includes a first end and a second end, the first end being connected to a first arm and the second end abutting against the housing, with at least one bent section between the first end and the second end.
[0017] Based on the embodiments described above, the elastic portion formed by at least one bent segment provides a stable elastic preload while featuring a simple structure and ease of integral molding of the buffer component. Compared to separately setting springs or similar structural components, this embodiment simplifies the structure and reduces the space occupied by the buffer component.
[0018] In some examples, the second end of the elastic part is provided with an abutment part, the housing is provided with an abutment wall, the abutment wall is provided with a limiting groove, and the abutment part abuts against the abutment wall and can enter the limiting groove.
[0019] Based on the embodiments described above, the abutment portion facilitates relative movement between the end of the elastic portion near the housing and the abutment wall of the housing. This helps to make the elastic portion move more smoothly relative to the abutment wall, so that the elastic portion can apply a stable elastic preload to the first arm during compression or recovery. The limiting groove can work with the abutment portion to limit the position of the elastic portion, thereby limiting the direction of the elastic preload provided by the elastic portion, so as to improve the stability of the locking state of the first and second latch portions.
[0020] In some examples, the first fastener is configured as a fastener groove and the second fastener is configured as a fastener boss, or the first fastener is configured as a fastener boss and the second fastener is configured as a fastener groove, with the fastener groove and the fastener boss correspondingly overlapping.
[0021] Based on the above embodiments of this application, the first and second fastening parts adopt a fastening groove and fastening boss cooperation form, which simplifies the structure and has the characteristic of stable cooperation.
[0022] In some examples, the support includes a receiving cavity and a first overlap, the moving contact includes a second overlap, the energy storage member and a portion of the moving contact are disposed in the receiving cavity, and the energy storage member includes a first lever arm and a second lever arm spaced apart, the first lever arm abutting against the first overlap and the second lever arm abutting against the second overlap.
[0023] After the moving contact and the buffer are locked, the handle continues to drive the support to rotate relative to the moving contact, and the first lever arm moves relative to the second lever arm and begins to store energy.
[0024] Based on the above embodiments of this application, the energy storage component is connected to the support component via a first lever arm and to the moving contact via a second lever arm. This allows the energy storage component to store and release energy based on the action relationship between the support component and the moving contact, which is beneficial for the energy storage component to respond and act in a timely manner, thereby improving the tightness of the fit between the components in the rapid closing structure.
[0025] In some examples, the energy storage device includes a first torsion spring, a second torsion spring, and a connecting rod. The first and second torsion springs are spaced apart, and the connecting rod connects the first and second torsion springs. Each of the first and second torsion springs has an independent first lever arm and a second lever arm. There are two first overlapping portions, each abutting one-to-one with a first lever arm; alternatively, each first overlapping portion has two overlapping positions, each abutting one-to-one with a first lever arm. The connecting rod connects the two second lever arms and abuts against the second overlapping portions.
[0026] Based on the embodiments described above, the energy storage component is configured as a torsion spring with two torsion springs. These two torsion springs can be symmetrically arranged on both sides of the moving contact. This improves the energy storage effect of the energy storage component, thereby enhancing the reliability of the rapid closing function achieved by the energy storage component and the moving contact. Furthermore, it improves the installation stability of the moving contact within the receiving cavity, reducing the impact of the moving contact's swaying within the receiving cavity on the circuit breaker's opening and closing.
[0027] In some examples, the moving contact is provided with a rotating shaft, which is connected to the housing, and the support is provided with an oblong hole, through which the rotating shaft passes.
[0028] Based on the embodiments described above, the moving contact is directly rotatably connected to the housing via a rotating shaft, meaning the rotation center of the moving contact differs from the rotation center of the support member. This increases the opening distance of the circuit breaker, which is beneficial for extinguishing the arc. Simultaneously, the rotating shaft on the moving contact passes through the support member, and its engagement with the oblong hole on the support member helps limit the rotation range of the support member. Attached Figure Description
[0029] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0030] Figure 1 This is a schematic diagram of the overall structure of the circuit breaker provided in the embodiments of this application.
[0031] Figure 2 An exploded view of the fast-closing structure inside the circuit breaker provided in the embodiments of this application.
[0032] Figure 3 This is a schematic diagram of the circuit breaker in the open state provided in an embodiment of this application.
[0033] Figure 4 This is a schematic diagram of the structure when the first stage of the circuit breaker closing process is completed, as provided in the embodiments of this application.
[0034] Figure 5 Provided for the embodiments of this application Figure 4 A schematic diagram of the structure in which the buffer component and the moving contact are engaged.
[0035] Figure 6 This is a schematic diagram of the second stage of the circuit breaker's closing process, as provided in the embodiments of this application.
[0036] Figure 7 This is a schematic diagram of the circuit breaker provided in this application embodiment when the third stage of the closing process is completed and the fourth stage begins.
[0037] Figure 8 This is a schematic diagram of the structure of the buffer provided in the embodiment of this application.
[0038] Figure 9 This is a schematic diagram of the cooperation structure between the handle and the buffer when the circuit breaker is in the third stage of the closing process, as provided in the embodiments of this application.
[0039] Figure 10 This is a schematic diagram of the mating structure between the buffer and the housing provided in the embodiments of this application.
[0040] Figure 11 This is a schematic diagram of the locking structure between the buffer and the moving contact provided in an embodiment of this application.
[0041] Figure 12 This is a schematic diagram of the structure of the moving contact and energy storage device assembled in the support member according to an embodiment of this application.
[0042] Figure 13 Provided for the embodiments of this application Figure 12 Exploded view.
[0043] Figure 14 This is a structural schematic diagram illustrating the assembly relationship between the moving contact, the housing, and the support member, as provided in an embodiment of this application.
[0044] Explanation of reference numerals in the attached figures:
[0045] 1. Housing; 11. Abutting wall; 111. Limiting groove; 2. Handle; 21. Pushing part; 22. Transmission rod; 23. Clearance groove; 3. Support member; 31. Receiving cavity; 311. First support plate; 312. Second support plate; 313. Connecting part; 32. First overlapping part; 33. Overlap groove; 34. Waist-shaped hole; 4. Moving contact; 41. First fastening part; 411. First overlapping surface; 42. Rotating shaft; 43. 5. Second overlapping part; 6. Energy storage component; 7. First lever arm; 8. Second lever arm; 9. First torsion spring; 10. Second torsion spring; 11. Connecting rod; 12. Buffer component; 13. Elastic part; 14. First end; 15. Second end; 16. Bending section; 17. Abutting part; 18. Second buckle part; 19. Second overlapping surface; 10. First arm; 11. Rotating part; 12. Second arm; 13. Receiving part. Detailed Implementation
[0046] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0047] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0048] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0049] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0050] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0051] Low-voltage circuit breakers generally include an operating mechanism and a moving contact assembly. The operating mechanism includes structural components such as a handle and transmission parts, while the contact assembly includes a moving contact and a stationary contact. When closing the circuit breaker, it is usually necessary to manually move the handle in the operating mechanism, which in turn drives the moving contact to approach and contact the stationary contact via the transmission parts to complete the closing.
[0052] However, during the above-mentioned closing process, the closing speed is greatly affected by human factors, and there is a possibility that the circuit may be damaged by overload or short circuit due to slow closing speed.
[0053] Based on this, the embodiments of this application provide a circuit breaker quick closing mechanism, which can ensure the rapid connection of the contact assembly when closing, thereby improving the closing effect and reliability of the product.
[0054] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.
[0055] Please refer to Figures 1 to 3 This embodiment provides a quick-closing mechanism for a circuit breaker. The circuit breaker includes a housing 1, and the quick-closing mechanism includes a handle 2, a support 3, a moving contact 4, an energy storage component 5, and a buffer 6. The handle 2, support 3, moving contact 4, and buffer 6 are all rotatably connected to the housing 1. The support 3 is drively connected to the handle 2. The moving contact 4 is provided with a first latching part 41. The energy storage component 5 is connected to both the support 3 and the moving contact 4.
[0056] The buffer 6 is rotatably connected to the housing 1. The buffer 6 includes an integrally formed elastic part 61 and a second buckle part 62. The elastic part 61 and the second buckle part 62 are disposed opposite to each other on both sides of the rotation center of the buffer 6. The elastic part 61 can provide an elastic preload to maintain the relative locking of the first buckle part 41 and the second buckle part 62.
[0057] Reference Figures 3 to 7 During the circuit breaker closing process, the handle 2 drives the support 3 to rotate, and the support 3 drives the moving contact 4 to rotate through the energy storage component 5. Then, the buffer 6 locks the moving contact 4, and the support 3 moves relative to the moving contact 4 and allows the energy storage component 5 to store energy.
[0058] As the handle 2 continues to rotate, it can unlock the first latch 41 and the second latch 62. The energy storage component 5 stops storing energy and quickly resets, causing the moving contact 4 to quickly rotate to the closed position.
[0059] Reference Figures 1 to 3 Handle 2, as a component in the circuit breaker that is directly operated by humans, can control the opening and closing of the circuit breaker. Handle 2 is rotatably connected to housing 1. During the closing operation, manually driving handle 2 to rotate can drive the mechanism inside the circuit breaker to complete the closing.
[0060] The support member 3 in the circuit breaker supports components such as the moving contact 4, trip latch, and locking latch. The support member 3 is rotatably connected to the housing 1 and is driven by the handle 2. During the closing operation, the handle 2 can drive the support member 3 to rotate, which in turn indirectly drives the moving contact 4 to the closing position and locks the locking latch and trip latch, thereby completing the closing operation.
[0061] The transmission connection between the handle 2 and the support 3 can be achieved using a transmission rod 22 or gear transmission. For example, in this embodiment, a transmission rod 22 connects the handle 2 and the support 3. During rotation, the handle 2 drives the support 3 to rotate synchronously via the transmission rod 22, and the rotation direction of the handle 2 is consistent with the rotation direction of the support 3.
[0062] The moving contact 4 is an important component of the circuit breaker used to connect and disconnect the circuit. The moving contact 4 is directly rotatably connected to the housing 1 and can rotate independently relative to the support 3. The first latch 41 provided on the moving contact 4 can be locked with the second latch 62 provided on the buffer 6, thereby restricting the movement of both the buffer 6 and the moving contact 4.
[0063] The energy storage component 5 is connected to both the support component 3 and the moving contact 4. That is, the energy storage component 5 can store energy between the support component 3 and the moving contact 4 so that the action generated by the energy storage component 5 after release can drive the moving contact 4 to move quickly to the closing position.
[0064] The buffer 6 is rotatably connected to the housing 1. The rotatable connection position between the buffer 6 and the housing 1 is the rotation center of the buffer 6. The elastic part 6 and the first fastening part 41 are disposed opposite to each other on both sides of the rotation center. The buffer 6 is rotated by the elastic pre-tightening force provided by the elastic part 6, so that the second fastening part 62 on the buffer 6 tends to move closer to the first fastening part 41. After the first fastening part 41 and the second fastening part 62 are locked together, they can be used to maintain the locking relationship.
[0065] Reference Figures 3 to 7 Furthermore, the fast closing mechanism provided in this embodiment is implemented as follows when the circuit breaker performs a closing operation:
[0066] In the first stage, the handle 2 is turned so that it starts to rotate from the initial position. The handle 2 drives the support 3 to rotate synchronously through the transmission connection. At the same time, the support 3 drives the energy storage component 5 to move. The energy storage component 5 drives the moving contact 4 to rotate until the first latch 41 and the second latch 62 lock each other.
[0067] In the second stage, the handle 2 is continued to be turned, and the handle 2 continues to drive the support 3 to rotate. The support 3 drives the energy storage component 5 to move. Since the moving contact 4 and the buffer 6 are locked together, the moving contact 4 does not move during the process of the support 3 driving the energy storage component 5 to move, and the energy storage component 5 begins to store energy.
[0068] The third stage is the process in which the first buckle 41 and the second buckle 62 unlock as the handle 2 continues to rotate, when the handle 2 rotates to exert a force on the buffer 6.
[0069] In the fourth stage, at the moment the first latch 41 and the second latch 62 unlock, the energy storage component 5 begins to release stored energy and quickly resets, causing the moving contact 4 to quickly rotate to the closed position with the stationary contact, and the handle 2 and the support component 3 both rotate to the closed position.
[0070] It should be noted that the aforementioned initial positions refer to the positions of each component when the circuit breaker is in the open state, while the closing and closed positions refer to the positions of each component when the circuit breaker is in the closed state.
[0071] Based on the embodiments described above, by incorporating a buffer 6 in the circuit breaker, the position of the moving contact 4 can be locked during the closing process, preventing the moving contact 4 from prematurely rotating to the closed position and affecting the safety of the circuit and load. Simultaneously, energy is stored in the energy storage device 5 during the closing process, so that the stored energy can be released in the final stage of closing to achieve rapid closing of the moving contact 4. This configuration ensures that the circuit breaker can respond quickly and stably to sudden, high-intensity load impacts, thereby protecting the circuit and equipment from damage.
[0072] Reference Figure 8 In some examples, the buffer 6 also includes an integrally formed first arm 63, a rotating part 64 and a second arm 65. The rotating part 64 is rotatably connected to the housing 1. The first arm 63 and the second arm 65 are disposed on different sides of the rotating part 64. An elastic part 61 is disposed on the first arm 63 and a second buckle part 62 is disposed on the side of the second arm 65 near the first buckle part 41.
[0073] The elastic pre-tightening force provided by the elastic part 61 acts on the first arm 63. The elastic part 61 can drive the rotating part 64 to rotate through the first arm 63, and drive the second arm 65 to abut against the first buckle part 41 through the rotating part 64.
[0074] In this design, the rotating part 64 is a column, with the first arm 63 and the second arm 65 located on the side wall of the column and extending away from the rotating part 64. Rotating shafts are located at both ends of the rotating part 64, and rotating holes corresponding to these shafts are provided on the housing 1. The rotating part 64 is rotatably connected to these rotating holes via the rotating shafts at both ends. This type of buffer member 6 has a simple structure and is easy to assemble. Alternatively, rotating holes can be provided at both ends of the rotating part 64, with corresponding rotating shafts on the housing 1, which also allows for the rotatable connection of the rotating part 64.
[0075] The buffer 6 is disposed between the handle 2 and the moving contact 4. The first arm 63 of the buffer 6 extends towards the side closer to the handle 2, and the second arm 65 extends towards the side closer to the moving contact 4.
[0076] Reference Figure 8 An elastic portion 61 is disposed at the end of the first arm 63 away from the rotating portion 64, and the elastic portion 61 is located on the first side of the first arm 63. The other end of the elastic portion 61 can abut against the inner wall of the housing 1 or against the handle 2. In this embodiment, the other end of the elastic portion 61 abuts against the inner wall of the housing 1. Since the rotation range of the buffer member 6 between the handle 2 and the moving contact 4 is less than the length of the elastic portion 61 in its natural state, after the buffer member 6 is assembled into the housing 1, the elastic portion 61 is always in a compressed state, thereby providing an elastic preload force so that the first arm 63 has a tendency to move to the second side, that is, the buffer member 6 rotates in a clockwise direction. The first side and the second side are opposite sides of the first arm 63.
[0077] The second latch 62 is located at the end of the second arm 65 away from the rotating part 64, and is situated on the second side of the second arm 65. The moving contact 4 is positioned along the clockwise rotation path of the second arm 65, with the second side of the second arm 65 facing the moving contact 4. This allows the second latch 62 to approach and lock with the first latch 41 during the clockwise rotation of the buffer member 6 caused by the elastic preload of the elastic part 61. The first side and the second side of the second arm 65 are opposite to each other.
[0078] The buffer 6, which is integrally formed from the first arm 63, the rotating part 64, the second arm 65, the elastic part 61, and the second latching part 62, can cause the second latching part 62 to move closer to the first latching part 41 and lock under the action of the elastic pre-tightening force provided by the elastic part 61. Thus, the first latching part 41 and the second latching part 62 can be automatically locked in the first and second stages of the closing process.
[0079] The first arm 63 and the second arm 65 are spaced apart on the rotating part 64. The included angle between the first arm 63 and the second arm 65 is an obtuse angle. The first arm 63, the rotating part 64 and the second arm 65 together form a buffer 6 with a lever-like structure, which facilitates both automatic locking and subsequent unlocking.
[0080] Based on the embodiments described above, the integrally molded buffer 6 effectively reduces the number of parts in the circuit breaker's fast-closing mechanism, facilitating assembly into the circuit breaker's housing 1 and improving space utilization within the housing 1. Furthermore, the integrally molded buffer 6 exhibits high structural stability, utilizing its elastic portion 61 to enhance the stability of the locking mechanism with the moving contact 4. This prevents the locking engagement between the buffer 6 and the moving contact 4 from failing, thereby improving the reliability of the circuit breaker's fast-closing mechanism.
[0081] In one alternative embodiment, the buffer 6 can be integrally injection molded.
[0082] In some examples, the buffer 6 also includes a receiving part 66, and a pushing part 21 is provided on the handle 2. The receiving part 66 is located on the rotation path of the pushing part 21. During the rotation of the handle 2, the pushing part 21 can push the receiving part 66 so that the receiving part 66 can drive the first buckle part 41 and the second buckle part 62 to unlock.
[0083] Based on the above embodiments of this application, the push part 21 and the receiving part 66 can directly drive the buffer 6 to move during the rotation of the handle 2, so as to unlock the first buckle part 41 and the second buckle part 62. The transmission method is simple and efficient, eliminating the need for a transmission structure, which helps to reduce space occupation and production costs.
[0084] Reference Figure 9 In some examples, the receiving part 66 is disposed on the first arm 63, and the receiving part 66 and the elastic part 61 are located on opposite sides of the first arm 63. During the rotation of the handle 2, the pushing part 21 applies a thrust to the receiving part 66, which acts on the first arm 63, and the direction of the thrust is opposite to the direction of the elastic preload.
[0085] The receiving part 66 is provided on the second side of the first arm 63, that is, the receiving part 66 and the elastic part 61 are located on opposite sides of the first arm 63.
[0086] The handle 2 is located on the second side of the first arm 63. A clearance groove 23 is provided on the side wall of the handle 2 to avoid the receiving part 66. The pushing part 21 is provided in the clearance groove 23.
[0087] During the first and second stages of the closing process, the handle 2 rotates relative to the housing 1, the receiving part 66 is always in the relief groove 23, and the receiving part 66 does not contact the pushing part 21 in the relief groove 23, so the buffer 6 is stationary relative to the handle 2.
[0088] When the handle 2 is rotated until the pushing part 21 contacts the receiving part 66, the third stage begins. In this stage, the handle 2 continues to rotate, and the pushing part 21 applies a pushing force to the receiving part 66. The direction of the pushing force is opposite to the direction of the elastic preload, causing the buffer 6 to tend to rotate counterclockwise. When the pushing force on the buffer 6 is greater than the elastic preload, the buffer 6 rotates counterclockwise. At this time, the elastic part 61 is gradually compressed, and the second buckle part 62 gradually separates from the first buckle part 41.
[0089] The receiving part 66 is a protrusion provided on the first arm 63, and the pushing part 21 is a protrusion provided in the relief groove 23.
[0090] Based on the above embodiments of this application, by providing a pushing part 21 on the handle 2 and a receiving part 66 on the corresponding buffer 6, the buffer 6 can be pushed during the rotation of the handle 2. The first buckle part 41 and the second buckle part 62 can be unlocked by utilizing the lever-like structure of the buffer 6. This has the characteristics of simple structure, efficient and stable cooperation.
[0091] Reference Figure 8 In some examples, the elastic part 61 includes a first end 611 and a second end 612, the first end 611 being connected to the first arm 63, the second end 612 abutting against the housing 1, and at least one bent section 613 being included between the first end 611 and the second end 612.
[0092] In this embodiment, the elastic part 61 is configured as a sheet-like structure. The sheet-like elastic part 61 is integrally formed on the first arm 63. The first end 611 of the sheet-like elastic part 61 is integrally connected to the first arm 63, and the second end 612 extends in a direction away from the first side of the first arm 63.
[0093] The bending segment 613 provides elasticity to the sheet-like elastic part 61. In this embodiment, three bending segments 613 are provided, which are spaced apart on the sheet-like elastic part 61 to give the elastic part 61 strong elasticity. This can provide a stable elastic pre-tightening force for the buffer 6, thereby keeping the second buckle part 62 and the first buckle part 41 stably locked.
[0094] Based on the embodiments described above, the elastic portion 61 formed by at least one bent segment 613 provides a stable elastic preload while featuring a simple structure and facilitating the integral molding of the buffer member 6. Compared to separately setting springs or similar structural components, this embodiment simplifies the structure and reduces the space occupied by the buffer member 6.
[0095] Reference Figure 10In some examples, the second end 612 of the elastic part 61 is provided with an abutment part 614, the housing 1 is provided with an abutment wall 11, the abutment wall 11 is provided with a limiting groove 111, and the abutment part 614 abuts against the abutment wall 11 and can enter the limiting groove 111.
[0096] The abutting part 614 is provided at the second end 612 of the elastic part 61. The elastic part 61 is a sheet-like structure, while the abutting part 614 is a columnar structure, and the size of the abutting part 614 is larger than the size of the sheet-like elastic part 61.
[0097] The abutment wall 11 is disposed on the inner wall of the housing 1. The abutment wall 11 is disposed close to the first side of the first arm 63, that is, the elastic part 61 is located between the first arm 63 and the abutment wall 11. The abutment part 614 is configured as a columnar structure to facilitate the sliding of the abutment part 614 relative to the abutment wall 11. Thus, during the compression or release of the elastic part 61, the elastic part 61 can move smoothly relative to the abutment wall 11, which is beneficial to maintaining the continuity and stability of the relative movement between the buffer 6 and the moving contact 4 during the locking and unlocking process.
[0098] In addition, a limiting groove 111 is provided on the abutting wall 11. The limiting groove 111 can limit the abutting part 614, improve the accuracy of the correspondence between the abutting part 614 and the abutting wall 11, and thus improve the consistency of the direction of the elastic preload provided by the elastic part 61.
[0099] Based on the embodiments described above, the abutment portion 614 facilitates relative movement between the end of the elastic portion 61 near the housing 1 and the abutment wall 11 of the housing 1. This helps the elastic portion 61 move more smoothly relative to the abutment wall 11, ensuring that the elastic portion 61 applies a stable elastic preload to the first arm 63 during compression or recovery. The limiting groove 111, in conjunction with the abutment portion 614, restricts the position of the elastic portion 61, thereby limiting the direction of the elastic preload provided by the elastic portion 61, thus improving the stability of the locking state of the first latch portion 41 and the second latch portion 62.
[0100] Reference Figure 11 In some examples, the first latch portion 41 is configured as a latch groove, and the second latch portion 62 is configured as a latch boss.
[0101] The latch groove is formed on the side wall of the moving contact 4 near the buffer 6, and the latch boss is set on the second side of the second arm 65. During the rotation of the buffer 6 and the moving contact 4, the latch boss of the second latch part 62 will extend into the latch groove of the first latch part 41 and abut against each other. The shape and size of the latch boss are the same as the shape and size of the latch groove, so as to realize the overlap and locking of the two.
[0102] In another embodiment (not shown in the figure), the first fastening part 41 is configured as a fastening boss, and the second fastening part 62 is configured as a fastening groove, with the fastening groove corresponding to and overlapping the fastening boss.
[0103] This configuration is similar to the aforementioned embodiment, except that the configurations of the first buckle portion 41 and the second buckle portion 62 are interchanged, achieving the same technical effect, and will not be described in detail here.
[0104] Meanwhile, the inner surface of the latch groove is the first lap surface 411, and the side of the latch boss is the second lap surface 621. The latch boss and the latch groove can also improve the locking effect through the contact of the first lap surface 411 and the second lap surface 621.
[0105] Specifically, refer to Figure 11 After the first latch 41 and the second latch 62 are engaged and locked, the first latching surface 411 on the first latch 41 and the second latching surface 621 on the second latch 62 come into contact with each other. The first latch 41 and the second latch 62 are in a face-to-face contact form, and the friction between the surfaces helps to improve the locking effect.
[0106] In addition, the first overlapping surface 411 has an inclined angle relative to the hook and loop groove, and the second overlapping surface 621 has the same inclined angle as the first overlapping surface. After the hook and loop protrusion and the hook and loop groove overlap each other, under the action of the relatively inclined first overlapping surface 411 and the second overlapping surface 621, the hook and loop protrusion tends to move towards the bottom of the hook and loop groove. This movement tendency can keep the hook and loop protrusion in a relatively locked state, which is beneficial to improving the locking stability of the first hook and loop part 41 and the second hook and loop part 62.
[0107] Based on the above embodiments of this application, the first fastening part 41 and the second fastening part 62 adopt a fastening groove and fastening boss cooperation form, which simplifies the structure and has the feature of stable cooperation.
[0108] Reference Figure 12 In some examples, the support member 3 includes a receiving cavity 31 and a first overlapping portion 32, the moving contact 4 includes a second overlapping portion 43, and the energy storage member 5 and part of the moving contact 4 are disposed in the receiving cavity 31. The energy storage member 5 includes a first lever arm 51 and a second lever arm 52 spaced apart. The first lever arm 51 abuts against the first overlapping portion 32, and the second lever arm 52 abuts against the second overlapping portion 43. After the moving contact 4 is locked with the buffer member 6, the handle 2 continues to drive the support member 3 to rotate relative to the moving contact 4, and the first lever arm 51 moves relative to the second lever arm 52 and begins to store energy.
[0109] The support member 3 includes a first support plate 311, a second support plate 312, and a connecting part 313. The first support plate 311 and the second support plate 312 are disposed opposite to each other on both sides of the connecting part 313, and the first support plate 311 and the second support plate 312 are parallel to each other. The first support plate 311, the second support plate 312, and the connecting part 313 enclose and form a receiving cavity 31.
[0110] The first overlapping part 32 is disposed on the side wall of the first support plate 311 facing the second support plate 312. The first overlapping part 32 protrudes from the first support plate 311. An overlapping groove 33 is formed between the first overlapping part 32 and the connecting part 313. The first lever arm 51 of the energy storage component 5 can extend into the overlapping groove 33, which is beneficial to improving the stability of the fit between the energy storage component 5 and the support component 3.
[0111] The second lap portion 43 is disposed on the moving contact 4, and the second lap portion 43 is located on the extension portion of the moving contact 4.
[0112] The moving contact 4 is rotatably connected to the housing 1, and the rotatable connection part 313 of the moving contact 4 is located in the receiving cavity 31 so that the energy storage member 5 and the support member 3 can cooperate in the receiving cavity 31.
[0113] Specifically, refer to Figure 12 The moving contact 4 is directly rotatably connected to the housing 1 via the rotating shaft 42. The rotating shaft 42 is positioned to pass through both the first support plate 311 and the second support plate 312, and the moving contact 4 is located precisely between the first support plate 311 and the second support plate 312.
[0114] The energy storage element 5 can be configured as a torsion spring, with the first lever arm 51 and the second lever arm 52 being the first and second torsion arms of the torsion spring. The torsion spring can be sleeved on the rotating shaft 42 of the moving contact 4. The first torsion arm of the torsion spring abuts against the first overlapping portion 32 on the support member 3, and the second torsion arm of the torsion spring abuts against the second overlapping portion 43 on the moving contact 4. Thus, when the support member 3 and the moving contact 4 rotate relative to each other, the torsion spring begins to store energy.
[0115] For example, refer to Figure 6 In the second stage of the closing process, the moving contact 4 is locked by the buffer 6. The handle 2 continues to rotate, which will drive the support 3 to continue to rotate. The support 3 cannot drive the moving contact 4 to rotate through the energy storage device 5. Then the support 3 drives the first lever arm 51 of the energy storage device 5 to rotate. The second lever arm 52 of the energy storage device 5 and the moving contact 4 remain stationary. During this process, the energy storage device 5 stores energy.
[0116] In the fourth stage of the closing process, the moving contact 4 and the buffer 6 are unlocked. Since the support 3 continues to be driven by the handle 2, the energy storage unit 5 can only drive the moving contact 4 to move through the second lever 52. Since the energy storage unit 5 moves quickly when it is released and returns to its initial state, it can drive the moving contact 4 to rotate quickly, thereby achieving the function of rapid closing.
[0117] Based on the above embodiments of this application, the energy storage component 5 is connected to the support component 3 via the first lever arm 51 and the moving contact 4 via the second lever arm 52. This allows the energy storage component 5 to store and release energy based on the action relationship between the support component 3 and the moving contact 4, which is beneficial for the energy storage component 5 to respond and act in a timely manner, thereby improving the tightness of the fit between the components in the quick-closing structure.
[0118] In one optional embodiment, two energy storage components 5 can be provided. The two energy storage components 5 are disposed in the receiving cavity 31 and are disposed opposite to each other on both sides of the moving contact 4. That is, one energy storage component 5 is installed between the first support plate 311 and the moving contact 4, and the other energy storage component 5 is installed between the second support plate 312 and the moving contact 4. The connection between the first support plate 311 and the moving contact 4, as well as the connection between the second support plate 312 and the moving contact 4, are realized through the two energy storage components 5. This can further improve the energy storage effect, thereby improving the accuracy and stability of the rapid closing of the moving contact 4 in the fourth stage of the closing process.
[0119] Reference Figure 12 and Figure 13 In some examples, the energy storage component 5 includes a first torsion spring 53, a second torsion spring 54, and a connecting rod 55. The first torsion spring 53 and the second torsion spring 54 are spaced apart, and the connecting rod 55 connects the first torsion spring 53 and the second torsion spring 54. Each of the first torsion spring 53 and the second torsion spring 54 has an independent first lever arm 51 and a second lever arm 52. There are two first overlapping portions 32, which abut against the two first lever arms 51 in a one-to-one correspondence. Alternatively, the first overlapping portion 32 includes two overlapping positions, which abut against the two first lever arms 51 in a one-to-one correspondence. The connecting rod 55 connects the two second lever arms 52 and abuts against the second overlapping portion 43.
[0120] The first torsion spring 53 and the second torsion spring 54 have the same structure. The energy storage component 5 is in the receiving cavity 31. The first torsion spring 53 is located between the moving contact 4 and the first support plate 311. The first support plate 311 is provided with a first overlapping part 32. The first lever arm 51 on the first torsion spring 53 abuts against the first overlapping part 32 on the first support plate 311.
[0121] Similarly, the second torsion spring 54 is located between the moving contact 4 and the second support plate 312. The second support plate 312 is also provided with a first overlapping part 32. The first lever arm 51 on the second torsion spring 54 abuts against the first overlapping part 32 on the second support plate 312.
[0122] Reference Figure 12 and Figure 13 The connecting rod 55 between the first torsion spring 53 and the second torsion spring 54 abuts against the second overlapping part 43 on the moving contact 4. After the moving contact 4 and the buffer 6 are locked together, the support 3 continues to rotate with the handle 2 and drives the two first lever arms 51 on the energy storage component 5 to move, so that the first torsion spring 53 and the second torsion spring 54 store energy at the same time, effectively improving the energy storage efficiency.
[0123] When the moving contact 4 is unlocked from the buffer 6, the first torsion spring 53 and the second torsion spring 54 are released simultaneously. The second lever arm 52 formed by the connecting rod 55 drives the moving contact 4 to rotate, further improving the ability of the moving contact 4 to achieve rapid closing.
[0124] Based on the above embodiments of this application, the energy storage component 5 is configured as a torsion spring with two torsion springs. The two torsion springs can be symmetrically arranged on both sides of the moving contact 4. On the one hand, this can improve the energy storage effect of the energy storage component 5, thereby improving the reliability of the energy storage component 5 and the moving contact 4 in achieving the fast closing function. On the other hand, it can improve the installation stability of the moving contact 4 in the receiving cavity 31 and reduce the impact of the moving contact 4 shaking in the receiving cavity 31 on the opening and closing of the circuit breaker.
[0125] Reference Figure 13 and Figure 14 In some examples, the moving contact 4 is provided with a rotating shaft 42, which is connected to the housing 1, and the support 3 is provided with an oblong hole 34, in which the rotating shaft 42 passes.
[0126] Based on the above embodiments of this application, the moving contact 4 is directly rotatably connected to the housing 1 via a rotating shaft 42. That is, the rotation center of the moving contact 4 is different from the rotation center of the support member 3. This can increase the opening distance of the circuit breaker, which is beneficial to the extinguishing of the arc. At the same time, the rotating shaft 42 on the moving contact 4 passes through the support member 3, and its cooperation with the oblong hole 34 on the support member 3 can limit the rotation range of the support member 3.
[0127] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A circuit breaker quick-closing mechanism, characterized in that, The circuit breaker includes a housing, and the circuit breaker quick-closing mechanism includes: The handle is rotatably connected to the housing; A support member is rotatably connected to the housing, and the support member is drive-connected to the handle; A movable contact is rotatably connected to the housing, and a first latching part is provided on the movable contact; An energy storage component is connected to both the support and the moving contact. A buffer is rotatably connected to the housing. The buffer includes an integrally formed elastic part and a second buckle part. The elastic part and the second buckle part are disposed opposite to each other on both sides of the rotation center of the buffer. The elastic part can provide an elastic preload to maintain the relative locking of the first buckle part and the second buckle part. During the circuit breaker closing process, the handle drives the support to rotate, the support drives the moving contact to rotate through the energy storage device, and then the buffer locks the moving contact. The support moves relative to the moving contact and allows the energy storage device to store energy. As the handle continues to rotate, it can unlock the first and second latches, and the energy storage component stops storing energy and quickly resets so that the moving contact can quickly rotate to the closed position.
2. The circuit breaker quick-closing mechanism according to claim 1, characterized in that, The buffer also includes an integrally formed first arm, a rotating part and a second arm. The rotating part is rotatably connected to the housing. The first arm and the second arm are disposed on different sides of the rotating part. The elastic part is disposed on the first arm. The second buckle part is disposed on the side of the second arm close to the first buckle part. The elastic preload provided by the elastic part acts on the first arm, and the elastic part can drive the rotating part to rotate through the first arm, and drive the second arm to abut against the first buckle part through the rotating part.
3. The circuit breaker quick-closing mechanism according to claim 2, characterized in that, The buffer also includes a receiving part, and the handle is provided with a pushing part. The receiving part is located on the rotation path of the pushing part. During the rotation of the handle, the pushing part can push against the receiving part so that the receiving part can drive the first buckle part and the second buckle part to unlock.
4. The circuit breaker quick-closing mechanism according to claim 3, characterized in that, The receiving part is disposed on the first arm, and the receiving part and the elastic part are located on opposite sides of the first arm; During the rotation of the handle, the pushing part applies a thrust to the receiving part, which acts on the first arm. The direction of the thrust is opposite to the direction of the elastic preload.
5. The circuit breaker quick-closing mechanism according to claim 2, characterized in that, The elastic part includes a first end and a second end, the first end is connected to the first arm, the second end abuts against the housing, and at least one bending section is included between the first end and the second end.
6. The circuit breaker quick-closing mechanism according to claim 5, characterized in that, The second end of the elastic part is provided with an abutting part, the housing is provided with an abutting wall, the abutting wall is provided with a limiting groove, and the abutting part abuts against the abutting wall and can enter the limiting groove.
7. The circuit breaker quick-closing mechanism according to any one of claims 1-6, characterized in that, The first fastening part is configured as a fastening groove, and the second fastening part is configured as a fastening protrusion; Alternatively, the first buckle portion may be configured as a buckle boss, and the second buckle portion may be configured as a buckle groove, with the buckle groove and the buckle boss corresponding to each other.
8. The circuit breaker quick-closing mechanism according to any one of claims 1-6, characterized in that, The support includes a receiving cavity and a first overlapping portion, the moving contact includes a second overlapping portion, the energy storage component and part of the moving contact are disposed in the receiving cavity, the energy storage component includes a first lever arm and a second lever arm spaced apart, the first lever arm abuts against the first overlapping portion, and the second lever arm abuts against the second overlapping portion. After the moving contact is locked with the buffer, the handle continues to drive the support to rotate relative to the moving contact, and the first lever arm moves relative to the second lever arm and begins to store energy.
9. The circuit breaker quick-closing mechanism according to claim 8, characterized in that, The energy storage device includes a first torsion spring, a second torsion spring, and a connecting rod. The first torsion spring and the second torsion spring are spaced apart, and the connecting rod connects the first torsion spring and the second torsion spring. The first torsion spring and the second torsion spring are each provided with an independent first lever arm and a second lever arm. The first overlapping portion is provided in two parts, and the two first overlapping portions abut against the two first lever arms in a one-to-one correspondence; or, the first overlapping portion includes two overlapping positions, and the two overlapping positions abut against the two first lever arms in a one-to-one correspondence. The connecting rod connects the two second lever arms, and the connecting rod abuts against the second overlapping part.
10. The circuit breaker quick-closing mechanism according to any one of claims 1-6, characterized in that, The moving contact is provided with a rotating shaft, which is connected to the housing. The support is provided with an oblong hole, and the rotating shaft passes through the oblong hole.