Rapid closing mechanism of circuit breaker
By designing a buffer and energy storage structure in the circuit breaker, rapid closing of the moving contact is achieved, solving the arcing problem caused by excessively low closing speed and improving the safety and reliability of the circuit breaker.
Patent Information
- Application Number
- CN202423244993.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-26
AI Technical Summary
Existing miniature circuit breakers have a low closing speed during the closing process, which results in a long duration of electric arc between the contacts, easily burning out the contacts and other components.
A circuit breaker fast closing mechanism is designed. By setting a buffer between the handle and the moving contact, the second locking part on the buffer is locked to the first locking part on the moving contact. Combined with an energy storage structure, the moving contact can be quickly rotated to the closed position.
It increases the closing speed, reduces the possibility of arcing between the moving and stationary contacts, and improves the safety and reliability of the closing process.
Smart Images
Figure CN223598646U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of circuit breakers, in particular to a circuit breaker quick closing mechanism. BACKGROUND
[0002] Small circuit breakers usually include a handle, a moving contact and a static contact, the handle is directly or indirectly connected with the moving contact, when closing operation is performed, the handle can be manually operated to drive the moving contact to contact the static contact, so that the circuit breaker is turned on.
[0003] However, if the handle of the circuit breaker is manually operated to close, the closing speed is too low, the arc generated between the contacts of the circuit breaker lasts for a long time, and the contacts and other components of the circuit breaker are prone to burnout.
[0004] Therefore, it is urgent to provide a quick closing mechanism to solve the problems in the prior art. CONTENT OF THE INVENTION
[0005] The application aims to provide a circuit breaker quick closing mechanism which can accelerate the closing speed of the circuit breaker and improve the safety of the closing process.
[0006] The application provides a circuit breaker quick closing mechanism, the circuit breaker includes a housing, and the circuit breaker quick closing mechanism includes a handle, a linkage, a moving contact and a buffer which are rotationally arranged in the housing. The linkage is in transmission connection with the handle, and the linkage is provided with an energy storage structure. The moving contact is connected with the energy storage structure, and the moving contact is provided with a first locking portion.
[0007] The buffer includes a rotating portion and a second locking portion, the rotating portion is rotationally connected to the housing, the second locking portion is arranged on one side of the rotating portion close to the first locking portion, the rotating portion is provided with an elastic member, and the elastic member can provide elastic pre-tightening force to maintain the relative locking of the first locking portion and the second locking portion.
[0008] During the closing process of the circuit breaker, the handle drives the linkage to rotate, the linkage drives the moving contact to rotate through the energy storage structure, then the first locking portion and the second locking portion are relatively locked, and the linkage continues to rotate relative to the moving contact and stores energy in the energy storage structure.
[0009] The first locking portion and the second locking portion can be unlocked during the continuous rotation of the handle, the energy storage structure stops storing energy and quickly resets to quickly rotate the moving contact to the closed position.
[0010] Based on the above-mentioned embodiments of the present application, by setting the buffer between the handle and the movable contact, and using the second locking part on the buffer and the first locking part on the movable contact which can be locked with each other, the movable contact can store energy during the rotation with the linkage. At the same time, after the handle is rotated to the preset position, the buffer and the movable contact can be unlocked to reset the energy storage structure quickly, drive the movable contact to contact the static contact quickly, so as to reduce the possibility of arc between the movable contact and the static contact, thereby improving the safety of the closing process.
[0011] In some examples, the buffer further includes a first arm and a second arm, the first arm is arranged on the rotating part near the movable contact, and the second arm is arranged on the rotating part near the handle, the second locking part is arranged on the first arm, and the elastic part acts on the first arm to make the second locking part have a tendency to be close to and lock with the first locking part.
[0012] Based on the above-mentioned embodiments of the present application, by setting the first arm and the second arm on the rotating part, the buffer can cooperate with the movable contact by the first arm and cooperate with the handle by the second arm during the rotation, so that the buffer can produce accurate actions at the corresponding stage of the closing process, which is beneficial to improve the reliability of the rapid closing process.
[0013] In some examples, the rotating part is provided with a mounting groove, the elastic part includes a main body part, a first torsion arm and a second torsion arm, the main body part is installed in the mounting groove, the first torsion arm and the second torsion arm are arranged on the main body part in a spaced manner, the first torsion arm protrudes out of the mounting groove and partially abuts against the first arm, and the second torsion arm protrudes out of the mounting groove and partially abuts against the housing.
[0014] Based on the above-mentioned embodiments of the present application, the mounting groove is provided to fix and install the elastic part, so as to improve the assembly stability of the elastic part. The first torsion arm corresponds to abut against the first arm, and the second torsion arm corresponds to abut against the housing, which makes the elastic part play a stable elastic supporting role between the first arm and the housing, so that the first arm can have a movement tendency relative to the housing, so that the first arm is close to and abuts against the side of the movable contact where the first locking part is arranged, which is beneficial to the second locking part on the first arm to be locked with the first locking part in time, and improve the accuracy and stability of the first stage and the second stage of the closing process.
[0015] In some examples, the groove wall of the mounting groove is provided with a first limiting groove and a second limiting groove, the first limiting groove and the second limiting groove are in communication with the mounting groove, the first torsion arm is installed in the first limiting groove, and the second torsion arm is installed in the second limiting groove.
[0016] Based on the above-mentioned embodiments of the present application, by setting the first limiting groove for limiting the first torsion arm and setting the second limiting groove for limiting the second torsion arm, the first torsion arm and the second torsion arm can be conveniently extended out of the mounting groove, the assembly stability of the torsion spring on the rotating part is improved, it is ensured that the first torsion arm can accurately act on the first arm and the second torsion arm can accurately act on the shell, and the action reliability of the buffer is improved.
[0017] In some examples, the first arm is provided with an abutting portion on the side close to the rotating part, and the first torsion arm abuts against the abutting portion.
[0018] Based on the above-mentioned embodiments of the present application, by setting the abutting portion on the first arm close to the rotating part, the abutting position of the first torsion arm and the first arm can be improved, the elastic pre-tightening force provided by the elastic member can be accurately transmitted to the first arm through the first torsion arm, it is ensured that the first arm can rotate towards the direction close to the moving contact around the rotating part, the cooperation accuracy of the elastic member and the first arm is improved, the action reliability of the buffer is improved, and the reliable operation of the quick closing mechanism is ensured.
[0019] In some examples, the shell is provided with a blocking wall, the blocking wall is provided with a guide surface on the side close to the buffer, and the second torsion arm can move along the guide surface and abut against the blocking wall.
[0020] Based on the above-mentioned embodiments of the present application, the blocking wall is set to correspond to the second torsion arm, and the guide surface provided on the blocking wall facilitates the second torsion arm to abut against the blocking wall during the assembly of the buffer to the shell, so as to ensure that the buffer can stably and reliably rotate and realize the locking and unlocking with the moving contact.
[0021] In some examples, the second arm is provided with a receiving portion, the handle is provided with a pushing portion, the receiving portion is located on the rotating path of the pushing portion, and the handle can push the receiving portion through the pushing portion during the rotation to drive the rotating part to rotate through the receiving portion.
[0022] Based on the above-mentioned embodiments of the present application, the setting of the pushing portion and the receiving portion enables the handle to directly drive the buffer to rotate during the rotation, so that the first arm of the buffer rotates away from the moving contact. This cooperation form is simple in structure and efficient in cooperation, which is conducive to the quick unlocking of the buffer and the moving contact and avoids affecting the normal operation of the closing process.
[0023] In some examples, the linkage includes a containing cavity and a first lap joint portion, the moving contact is provided with a second lap joint portion, the energy storage structure and part of the moving contact are arranged in the containing cavity, the energy storage structure includes a first force arm and a second force arm arranged at intervals, the first force arm abuts against the first lap joint portion, and the second force arm abuts against the second lap joint portion. After the first locking portion and the second locking portion are locked, the handle continues to drive the linkage to rotate relative to the moving contact, the first force arm moves relative to the second force arm and starts to store energy.
[0024] Based on the above-mentioned embodiments of the present application, the energy storage structure abuts against the first lap joint through the first force arm and abuts against the second lap joint through the second force arm, so that the energy storage and reset of the energy storage structure can be realized according to the relative movement between the linkage and the movable contact, and the energy storage structure can respond in time and act between the linkage and the movable contact, so as to ensure that the movable contact can rotate to the closed position in time and quickly.
[0025] In some examples, the energy storage structure comprises a first torsional spring, a second torsional spring and a connecting rod, the first torsional spring and the second torsional spring are arranged at intervals, the connecting rod connects the first torsional spring and the second torsional spring, and the first torsional spring and the second torsional spring are each provided with independent first and second force arms. The first lap joint is provided with two, and the two first lap joints correspondingly abut against the two first force arms, the connecting rod connects the two second force arms, and the connecting rod abuts against the second lap joint.
[0026] Based on the above-mentioned embodiments of the present application, by arranging the first and second torsional springs and connecting them into a whole through the connecting rod, the movable contact can be arranged between the first and second torsional springs, so that the energy storage effect of the energy storage structure can be improved, and the movable contact can be applied with a large enough force when the energy storage structure is reset, so as to improve the speed of the movable contact rotating to the closed position and achieve the purpose of quick closing.
[0027] In some examples, the first locking part is arranged as a locking groove, and the second locking part is arranged as a locking boss. Alternatively, the first locking part is arranged as a locking boss, and the second locking part is arranged as a locking groove, and the locking groove and the locking boss correspondingly lock.
[0028] Based on the above-mentioned embodiments of the present application, the locking groove and the locking boss are mutually lapped to realize the locking cooperation, which has the characteristics of simple structure and easy manufacturing. The locking stability of the locking groove and the locking boss is high, and they can be easily unlocked, which is beneficial to improving the stability of the closing process. BRIEF DESCRIPTION OF DRAWINGS
[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.
[0030] Figure 1 The structural schematic diagram of the quick closing mechanism of the circuit breaker provided by the embodiments of the present application.
[0031] Figure 2 The exploded view of the quick closing mechanism of the circuit breaker provided by the embodiments of the present application.
[0032] Figure 3 The schematic view of the quick closing mechanism of the circuit breaker in the open state is provided for the embodiment of the present application.
[0033] Figure 4 The schematic view of the quick closing mechanism of the circuit breaker in the open state is provided for the embodiment of the present application. Figure 3 The schematic view of the cooperation relationship between the buffer and the movable contact is provided for the embodiment of the present application.
[0034] Figure 5 The schematic view of the first stage of the quick closing mechanism of the circuit breaker is provided for the embodiment of the present application.
[0035] Figure 6 The schematic view of the second stage of the quick closing mechanism of the circuit breaker is provided for the embodiment of the present application. Figure 5 The enlarged view of position A in the second stage of the quick closing mechanism of the circuit breaker is provided for the embodiment of the present application.
[0036] Figure 7 The schematic view of the second stage of the quick closing mechanism of the circuit breaker is provided for the embodiment of the present application.
[0037] Figure 8 The schematic view of the second stage of the quick closing mechanism of the circuit breaker is provided for the embodiment of the present application.
[0038] Figure 9 The schematic view of the second stage of the quick closing mechanism of the circuit breaker is provided for the embodiment of the present application. Figure 8 The enlarged view of position B in the second stage of the quick closing mechanism of the circuit breaker is provided for the embodiment of the present application.
[0039] Figure 10 The first view of the buffer is provided for the embodiment of the present application.
[0040] Figure 11 The second view of the buffer is provided for the embodiment of the present application.
[0041] Figure 12 The schematic view of the cooperation structure between the buffer and the shell is provided for the embodiment of the present application.
[0042] Figure 13 The schematic view of the cooperation structure between the buffer and the handle is provided for the embodiment of the present application.
[0043] Figure 14 The schematic view of the cooperation structure between the movable contact and the linkage is provided for the embodiment of the present application.
[0044] Figure 15 The schematic view of the cooperation structure between the movable contact and the linkage is provided for the embodiment of the present application. Figure 14 The exploded view of the cooperation structure between the movable contact and the linkage is provided for the embodiment of the present application.
[0045] Explanation of reference signs:
[0046] 1, housing; 11, blocking wall; 111, guide surface; 2, handle; 21, transmission rod; 22, pushing part; 23, avoiding groove; 3, linkage; 31, energy storage structure; 311, first force arm; 312, second force arm; 313, first torsional spring; 314, second torsional spring; 315, connecting rod; 32, accommodating cavity; 321, first mounting plate; 322, second mounting plate; 323, connecting part; 33, first lap joint part; 4, moving contact; 41, first locking part; 42, second lap joint part; 5, buffer; 51, rotating part; 511, mounting groove; 512, first limiting groove; 513, second limiting groove; 52, second locking part; 53, elastic part; 531, main body part; 532, first torsional arm; 533, second torsional arm; 54, first arm; 541, abutting part; 55, second arm; 551, receiving part. DETAILED DESCRIPTION
[0047] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations.
[0048] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.
[0049] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0050] In the description of the present application, it should be noted that the positions or location relationships indicated by the terms "inner", "outer" and the like are based on the positions or location relationships shown in the drawings, or the positions or location relationships commonly placed when the products of the present application are used, which are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the indicated devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.
[0051] In the description of the present application, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "set", "connected" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected, can be directly connected, or indirectly connected through intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0052] Under normal circuit conditions, the circuit breaker can close, carry and break the current. The circuit breaker generally includes a handle, a linkage, a moving contact and a static contact and the like. When controlling the closing of the circuit breaker, it is usually necessary to manually operate the handle, which drives the moving contact through the linkage until the moving contact contacts the static contact.
[0053] However, in the above closing process, the closing speed is greatly affected by human factors, and there may be damage to the circuit due to overloading or short circuit caused by slow closing speed.
[0054] Based on this, the embodiment of the present application provides a circuit breaker fast closing mechanism which can accelerate the closing speed of the circuit breaker and improve the safety of the closing process.
[0055] In order 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 described clearly and completely below with reference to the drawings.
[0056] Please refer to Figure 1 and Figure 2 The embodiment provides a circuit breaker fast closing mechanism, the circuit breaker includes a housing 1, and the circuit breaker fast closing mechanism includes a handle 2, a linkage 3, a moving contact 4 and a buffer 5 which are rotationally arranged in the housing 1. The linkage 3 is in transmission connection with the handle 2, and the linkage 3 is provided with an energy storage structure 31. The moving contact 4 is connected with the energy storage structure 31, and the moving contact 4 is provided with a first locking portion 41.
[0057] The buffer 5 includes a rotating portion 51 and a second locking portion 52, the rotating portion 51 is rotationally connected to the housing 1, the second locking portion 52 is arranged on the side of the rotating portion 51 close to the first locking portion 41, and the rotating portion 51 is provided with an elastic member 53, which can provide elastic pre-tightening force to maintain the relative locking of the first locking portion 41 and the second locking portion 52.
[0058] In the closing process of the circuit breaker, the handle 2 drives the linkage 3 to rotate, the linkage 3 drives the moving contact 4 to rotate through the energy storage structure 31, then the first locking portion 41 and the second locking portion 52 are relatively locked, and the linkage 3 continues to rotate relative to the moving contact 4 and stores energy in the energy storage structure 31.
[0059] The handle 2 continues to rotate to unlock the first locking portion 41 and the second locking portion 52, and the energy storage structure 31 stops storing energy and quickly resets to make the movable contact 4 quickly rotate to the closed position.
[0060] Based on the above-mentioned embodiments of the present application, by arranging the buffer 5 between the handle 2 and the movable contact 4, and using the second locking portion 52 on the buffer 5 and the first locking portion 41 on the movable contact 4 to be locked with each other, the movable contact 4 can store energy of the energy storage structure 31 during the rotation with the linkage 3. At the same time, after the handle 2 rotates to the preset position, the buffer 5 and the movable contact 4 can be unlocked to quickly reset the energy storage structure 31, drive the movable contact 4 to quickly contact the static contact, reduce the possibility of arc between the movable contact 4 and the static contact, and improve the safety of the closing process.
[0061] Referring to Figure 1 and Figure 2 , the handle 2 is a component directly operated by a person in the circuit breaker, and is used for manually controlling the opening and closing of the circuit breaker. The handle 2 is rotationally connected to the housing 1, and when the closing operation is performed, the handle 2 is driven to rotate by a person to drive other mechanisms in the circuit breaker to complete the closing.
[0062] The linkage 3 is in transmission connection with the handle 2, so that the linkage 3 can rotate synchronously with the handle 2 on the housing 1. The transmission connection between the handle 2 and the linkage 3 can be in the form of transmission rod 21 transmission, gear transmission or belt transmission. In the embodiment, the transmission rod 21 is arranged between the handle 2 and the linkage 3, and the handle 2 drives the linkage 3 to rotate synchronously through the transmission rod 21 during the rotation, and the rotation direction of the linkage 3 is the same as that of the handle 2.
[0063] The linkage 3 is provided with the energy storage structure 31, which can be configured as a tension spring, a compression spring or a torsional spring. The movable contact 4 is connected to the energy storage structure 31, and the movable contact 4 can trigger the energy storage process of the energy storage structure 31 on the linkage 3. Correspondingly, the energy storage structure 31 can act on the movable contact 4 when releasing energy to make the movable contact 4 quickly rotate.
[0064] Referring to Figures 3 to 6 , the movable contact 4 is rotationally arranged on the housing 1, and the movable contact 4 can rotate independently relative to the linkage 3. The movable contact 4 is provided with the first locking portion 41, which is used to cooperate with the second locking portion 52 arranged on the buffer 5. During the rotation of the movable contact 4, the first locking portion 41 can be locked with the second locking portion 52 to limit the movable contact 4 from continuing to rotate with the linkage 3.
[0065] The buffering piece 5 is rotationally arranged on the shell 1 through the rotating part 51, and the elastic piece 53 is arranged on the rotating part 51, which can provide elastic pre-tightening force for the buffering piece 5, so that the buffering piece 5 can rotate relative to the shell 1, specifically, the buffering piece 5 rotates towards the first locking part 41, and the side of the buffering piece 5, on which the second locking part 52 is arranged, always abuts to the side of the moving contact 4, on which the first locking part 41 is arranged. In this way, during the rotation of the moving contact 4, the first locking part 41 can timely lock the second locking part 52.
[0066] Further, the specific implementation process of the circuit breaker quick closing mechanism provided by the embodiment is as follows:
[0067] In the first stage, the handle 2 is manually rotated, and the handle 2 rotates the linkage 3 synchronously through the transmission rod 21, and at the same time, the linkage 3 rotates the moving contact 4 synchronously through the energy storage structure 31, until the first locking part 41 and the second locking part 52 are locked with each other, refer to Figures 3 to 6 .
[0068] In the second stage, the handle 2 continues to rotate and drives the linkage 3 to rotate synchronously, at this time, since the moving contact 4 and the buffering piece 5 are locked with each other, the linkage 3 can only drive the energy storage structure 31, so that the energy storage structure 31 starts to store energy, until the handle 2 rotates to just contact the buffering piece 5, refer to Figure 7 .
[0069] In the third stage, the handle 2 continues to rotate, and the handle 2 generates force on the buffering piece 5, so that the buffering piece 5 rotates relative to the shell 1, and then the second locking part 52 moves away from the first locking part 41, until the second locking part 52 is completely separated from the first locking part 41, refer to Figure 8 and Figure 9 .
[0070] In the fourth stage, at the moment when the first locking part 41 and the second locking part 52 are unlocked, the energy storage structure 31 rapidly releases energy and resets, the energy storage structure 31 drives the moving contact 4 to quickly rotate to the position of contacting the static contact, and the handle 2 and the linkage 3 are both rotated to the closing position, refer to Figure 8 and Figure 9 .
[0071] It should be noted that the aforementioned preset position is the position of the handle 2, which rotates to generate force on the buffering piece 5, so that the buffering piece 5 rotates under force. The initial position is the position of each component when the circuit breaker is in the open state. The closing position is the position of each component when the circuit breaker is in the on state.
[0072] refer to Figure 1 and Figure 2 , Figure 10 and Figure 11In some examples, the buffer 5 further comprises a first arm 54 and a second arm 55, the first arm 54 is arranged on the rotating part 51 near the moving contact 4, and the second arm 55 is arranged on the rotating part 51 near the handle 2, the second locking part 52 is arranged on the first arm 54, and the elastic member 53 acts on the first arm 54 partially, so that the second locking part 52 has a tendency to lock against the first locking part 41.
[0073] Based on the above-mentioned embodiments of the present application, by arranging the first arm 54 and the second arm 55 on the rotating part 51, the buffer 5 can cooperate with the moving contact 4 by the first arm 54 and cooperate with the handle 2 by the second arm 55 during the rotating process, so that the buffer 5 can generate accurate actions at the corresponding stages of the closing process, which is beneficial to improve the reliability of the rapid closing process.
[0074] Specifically, the rotating part 51 is arranged as a column, the first arm 54 and the second arm 55 are arranged on the side wall of the column and extend away from the rotating part 51, both ends of the rotating part 51 are provided with rotating shafts, the shell 1 is provided with rotating holes corresponding to the rotating shafts, and the rotating part 51 is rotatably connected in the rotating holes by the rotating shafts at both ends, which has the characteristics of simple structure and convenient assembly. Of course, both ends of the rotating part 51 can also be arranged as rotating holes, and the shell 1 is correspondingly provided with rotating shafts, and the rotating connection of the rotating part 51 can also be realized.
[0075] Referring to Figure 10 and Figure 11 , the first arm 54 and the second arm 55 are arranged on the rotating part 51 in a spaced manner, and the included angle between the first arm 54 and the second arm 55 is obtuse. The first arm 54, the rotating part 51 and the second arm 55 together form a buffer 5 similar to a lever structure, which is convenient for automatic locking and subsequent unlocking.
[0076] The elastic member 53 is arranged on the rotating part 51, and the elastic member 53 can be configured as a torsion spring, a tensile spring or a compression spring, etc. The elastic member 53 acts on the first arm 54 partially, i.e. the elastic member 53 provides an elastic pre-tightening force to the first arm 54, which can be a torsional force, a tensile force or a pushing force, etc. The first arm 54 has a movement tendency under the action of the elastic pre-tightening force, which enables the first arm 54 to drive the rotating part 51 to rotate and approach the moving contact 4, so as to realize the automatic locking of the first locking part 41 and the second locking part 52 at the first stage and the second stage of the closing process.
[0077] Referring to Figures 10 to 12In some examples, the rotating part 51 is provided with a mounting groove 511, the elastic member 53 comprises a main body part 531, a first torsion arm 532 and a second torsion arm 533, the main body part 531 is mounted in the mounting groove 511, the first torsion arm 532 and the second torsion arm 533 are arranged on the main body part 531 in a spaced manner, the first torsion arm 532 extends out of the mounting groove 511 and partially abuts against the first arm 54, and the second torsion arm 533 extends out of the mounting groove 511 and partially abuts against the shell 1.
[0078] Based on the above-mentioned embodiments of the present application, the mounting groove 511 is arranged to fix and mount the elastic member 53, so as to improve the assembly stability of the elastic member 53. The first torsion arm 532 corresponds to abut against the first arm 54, and the second torsion arm 533 corresponds to abut against the shell 1, which makes the elastic member 53 be able to play a stable elastic supporting role between the first arm 54 and the shell 1, so that the first arm 54 can have a movement trend relative to the shell 1, so that the first arm 54 is close to and abuts against the side of the moving contact 4 where the first locking part 41 is arranged, which is beneficial to the second locking part 52 on the first arm 54 and the first locking part 41 can be timely locked, and improves the accuracy and stability of the first stage and the second stage of the closing process.
[0079] In the embodiment, the mounting groove 511 is arranged on the rotating part 51, wherein the rotating part 51 is a column, the mounting groove 511 is arranged as an annular groove arranged around the rotating shaft at both ends of the column. The elastic member 53 is arranged as a torsion spring, the main body part 531 of the torsion spring is annular, the main body part 531 is mounted in the mounting groove 511, and the annular mounting groove 511 corresponds to the annular torsion spring, which can improve the assembly stability of the torsion spring.
[0080] The first torsion arm 532 and the second torsion arm 533 of the torsion spring both extend out of the mounting groove 511, the first torsion arm 532 abuts against the first arm 54, and the second torsion arm 533 abuts against the shell 1, as described above. Figure 8 and Figure 9 The first torsion arm 532 is located at the right side of the cooperation position of the first arm 54 and the cooperation position of the second torsion arm 533 and the shell 1, and the moving contact 4 is located at the right side of the first arm 54. In order to make the first arm 54 have a movement trend close to the moving contact 4, the elastic member 53 needs to be in an energy storage state, in which state, the direction of the force provided by the first torsion arm 532 to the first arm 54 is opposite to the direction of the force provided by the second torsion arm 533 to the shell 1, so that the first arm 54 moves to the side away from the shell 1, i.e. close to the moving contact 4.
[0081] Referring to Figure 10 and Figure 11In some examples, the slot wall of the mounting slot 511 is provided with a first limiting slot 512 and a second limiting slot 513, both of which are in communication with the mounting slot 511, the first torsion arm 532 is mounted in the first limiting slot 512, and the second torsion arm 533 is mounted in the second limiting slot 513.
[0082] Based on the above-mentioned embodiments of the present application, by providing the first limiting slot 512 for limiting the first torsion arm 532 and the second limiting slot 513 for limiting the second torsion arm 533, the extension of the first torsion arm 532 and the second torsion arm 533 out of the mounting slot 511 is facilitated, and the assembly stability of the torsion spring on the rotating part 51 is improved, ensuring that the first torsion arm 532 can accurately act on the first arm 54 and the second torsion arm 533 can accurately act on the housing 1, thereby improving the action reliability of the buffer 5.
[0083] Specifically, referring to Figure 11 , the first limiting slot 512 and the second limiting slot 513 are formed on the slot wall of the mounting slot 511. The first limiting slot 512 has a smaller width, and the second limiting slot 513 has a larger width. The first limiting slot 512 is formed on the slot bottom of the second limiting slot 513. The first torsion arm 532 extends out of the mounting slot 511 from the first limiting slot 512 and partially abuts against the first torsion arm 532. The first limiting slot 512 can limit the movement of the first torsion arm 532 along the circumference of the rotating part 51, so that the first torsion arm 532 remains fixed and ensures that the first torsion arm 532 stably abuts against the first arm 54.
[0084] The second torsion arm 533 extends out of the mounting slot 511 from the second limiting slot 513 and abuts against a portion of the structure in the housing 1. The second torsion arm 533 can move in the second limiting slot 513 along the circumference of the rotating part 51. During the process of being pushed by the handle 2, the second arm 55 of the buffer 5 rotates towards the position where the second torsion arm 533 abuts against the housing 1, so that the housing 1 pushes the second torsion arm 533 to move in the second limiting slot 513, thereby storing energy in the elastic member 53. When the handle 2 does not exert force on the buffer 5, the buffer 5 can be reset to the position where the first arm 54 abuts against the moving contact 4.
[0085] Referring to Figure 10 and Figure 11 , in some examples, the first arm 54 is provided with an abutting portion 541 on the side close to the rotating part 51, and the first torsion arm 532 abuts against the abutting portion 541.
[0086] Based on the above-mentioned embodiments of the present application, by arranging the abutting portion 541 on the first arm 54 close to the rotating portion 51, the abutting position of the first torsion arm 532 and the first arm 54 can be improved, so that the elastic pre-tightening force provided by the elastic member 53 can be accurately transmitted to the first arm 54 through the first torsion arm 532, ensuring that the first arm 54 can rotate around the rotating portion 51 towards the direction close to the movable contact 4, improving the cooperation accuracy of the elastic member 53 and the first arm 54, thereby improving the action reliability of the buffer 5 and ensuring the reliable operation of the quick closing mechanism.
[0087] The abutting portion 541 is arranged on the first arm 54 away from the side where the second locking portion 52 is arranged, and the abutting portion 541 is arranged as a boss, and an arc surface is arranged on the boss. The first torsion arm 532 extends out of the first limiting groove 512 and abuts against the arc surface. In this way, the first torsion arm 532 can accurately apply the elastic pre-tightening force to the first arm 54 through the abutting portion 541, which can reduce the extension distance of the first torsion arm 532 while stably pushing the first arm 54 to rotate around the rotating portion 51, and reduce material consumption and space occupation.
[0088] In an embodiment, the first torsion arm 532 can not extend out of the first limiting groove 512. Specifically, the first torsion arm 532 extends into the first limiting groove 512 from the mounting groove 511, and the first torsion arm 532 abuts against the groove wall of the first limiting groove 512. In this way, the rotating portion 51 can be pushed to rotate by the first torsion arm 532 under the cooperation of the housing 1 and the second torsion arm 533, and the action process of the buffer 5 can also be achieved.
[0089] Referring to Figure 12 In some examples, the housing 1 is provided with a blocking wall 11, and the blocking wall 11 is provided with a guide surface 111 close to one side of the buffer 5. The second torsion arm 533 can move along the guide surface 111 and abut against the blocking wall 11.
[0090] Based on the above-mentioned embodiments of the present application, the blocking wall 11 is arranged to correspond to the second torsion arm 533, and the guide surface 111 arranged on the blocking wall 11 facilitates the second torsion arm 533 to abut against the blocking wall 11 during the assembly of the buffer 5 to the housing 1, so as to ensure that the buffer 5 can stably and reliably rotate and realize the locking and unlocking with the movable contact 4.
[0091] The blocking wall 11 is arranged on the inner wall of the shell 1 and protrudes from the inner wall of the shell 1. The second arm 55 of the buffer 5 is located between the handle 2 and the blocking wall 11. The blocking wall 11 can simultaneously limit the positions of the second arm 55 and the second torsion arm 533 of the elastic member 53. The guide surface 111 is arranged as an inclined surface and is located on the side of the blocking wall 11 away from the inner wall of the shell 1. When the buffer 5 is assembled to the inner wall of the shell 1, the guide surface 111 can guide the second arm 55 and the second torsion arm 533 in the same way, so as to ensure that the second arm 55 and the second torsion arm 533 are both located between the blocking wall 11 and the handle 2. The arrangement can improve the assembly accuracy of the buffer 5, so that the buffer 5 can accurately lock and unlock the movable contact 4 in the rapid closing process, and ensure the reliable operation of the rapid closing.
[0092] With reference to Figure 7 , Figure 8 and Figure 13 , in some examples, the second arm 55 is provided with a receiving portion 551, and the handle 2 is provided with a pushing portion 22. The receiving portion 551 is located on the rotation path of the pushing portion 22. During the rotation of the handle 2, the pushing portion 22 can push the receiving portion 551, so as to drive the rotating portion 51 to rotate through the receiving portion 551.
[0093] Based on the above-mentioned embodiments of the present application, the arrangement of the pushing portion 22 and the receiving portion 551 enables the handle 2 to directly drive the buffer 5 to rotate during the rotation of the handle 2, so that the first arm 54 of the buffer 5 rotates away from the movable contact 4. The arrangement is simple in structure and efficient in cooperation, and is conducive to the rapid unlocking of the buffer 5 and the movable contact 4, and avoids affecting the normal performance of the closing process.
[0094] The handle 2 is provided with an avoiding groove 23 for avoiding the receiving portion 551. The pushing portion 22 is arranged in the avoiding groove 23.
[0095] During the first stage and the second stage of the closing process, the handle 2 rotates relative to the shell 1. The receiving portion 551 is always located in the avoiding groove 23, and the receiving portion 551 is not in contact with the pushing portion 22 in the avoiding groove 23. Therefore, the buffer 5 is stationary relative to the handle 2.
[0096] When the handle 2 rotates to the position where the pushing portion 22 contacts the receiving portion 551, the third stage of the closing process is entered. During this stage, the handle 2 continues to rotate, and the pushing portion 22 applies a pushing force to the receiving portion 551. The direction of the pushing force is opposite to the direction of the elastic pre-tightening force provided by the elastic member 53 on the rotating portion 51. Therefore, the buffer 5 has a tendency to rotate in the counterclockwise direction. When the pushing force applied to the buffer 5 is greater than the elastic pre-tightening force, the buffer 5 rotates in the counterclockwise direction, the first arm 54 moves away from the movable contact 4, and the second locking portion 52 is unlocked relative to the first locking portion 41.
[0097] Wherein, the receiving part 551 is a protrusion arranged on the first arm 54, and the pushing part 22 is a protrusion arranged in the avoiding groove 23.
[0098] Referring to Figure 14 and Figure 15 In some examples, the linkage 3 includes a receiving cavity 32 and a first lap joint 33, the movable contact 4 is provided with a second lap joint 42, the energy storage structure 31 and part of the movable contact 4 are arranged in the receiving cavity 32, the energy storage structure 31 includes a first force arm 311 and a second force arm 312 arranged at intervals, the first force arm 311 abuts against the first lap joint 33, and the second force arm 312 abuts against the second lap joint 42. After the first locking part 41 and the second locking part 52 are locked relative to each other, the handle 2 continues to drive the linkage 3 to rotate relative to the movable contact 4, the first force arm 311 moves relative to the second force arm 312 and starts to store energy.
[0099] Based on the above-mentioned embodiments of the present application, the energy storage structure 31 abuts against the first lap joint 33 through the first force arm 311 and abuts against the second lap joint 42 through the second force arm 312, so that the energy storage and reset of the energy storage structure 31 can be realized according to the relative movement between the linkage 3 and the movable contact 4, which is beneficial to the timely response and action of the energy storage structure 31 between the linkage 3 and the movable contact 4, so as to ensure that the movable contact 4 can be rotated to the closed position in time and quickly.
[0100] Specifically, the linkage 3 includes a first mounting plate 321, a second mounting plate 322 and a connecting part 323, the first mounting plate 321 and the second mounting plate 322 are arranged opposite to each other on two sides of the connecting part 323, and the first mounting plate 321 and the second mounting plate 322 are parallel to each other to enclose the receiving cavity 32.
[0101] The first lap joint 33 is arranged on the side of the first mounting plate 321 facing the second mounting plate 322, the first lap joint 33 protrudes from the first mounting plate 321, and the first force arm 311 of the energy storage structure 31 abuts against the side wall of the first lap joint 33. The second lap joint 42 is arranged on the movable contact 4, and the second lap joint 42 is located on the extension part of the movable contact 4, and the second force arm 312 of the energy storage structure 31 abuts against the second lap joint 42.
[0102] The movable contact 4 is rotationally connected to the housing 1, and the rotation connecting part 323 of the movable contact 4 is located in the receiving cavity 32, so as to form cooperation between the energy storage structure 31 and the linkage 3 in the receiving cavity 32. Specifically, the movable contact 4 is directly rotationally connected to the housing 1 through a rotating shaft, the rotating shaft passes through the first mounting plate 321 and the second mounting plate 322 at the same time, and the movable contact 4 is located between the first mounting plate 321 and the second mounting plate 322.
[0103] Referring to Figure 14The energy storage structure 31 can be a torsion spring, which is sleeved on the rotating shaft of the movable contact 4. The first force arm 311 of the torsion spring abuts against the first lap joint 33 on the linkage 3, and the second force arm 312 of the torsion spring abuts against the second lap joint 42 on the movable contact 4. When the linkage 3 and the movable contact 4 rotate relative to each other, the torsion spring starts to store energy.
[0104] For example, in the second stage of the closing process, the movable contact 4 is locked by the buffer 5, and the handle 2 continues to rotate to drive the linkage 3 to continue to rotate. The linkage 3 cannot continue to drive the movable contact 4 to rotate through the torsion spring. Then, the linkage 3 drives the first force arm 311 of the torsion spring to rotate, and the second force arm 312 of the torsion spring and the movable contact 4 remain stationary. In this process, the torsion spring stores energy.
[0105] In the fourth stage of the closing process, the movable contact 4 is unlocked from the buffer 5. Since the linkage 3 continues to be driven by the driving force of the handle 2, the first force arm 311 of the torsion spring cannot be reset, but can only be reset through the second force arm 312 to drive the movable contact 4 to act. Since the action of the torsion spring when it is released and reset is fast, it can drive the movable contact 4 to rotate quickly, thereby achieving the function of quick closing.
[0106] Referring to Figure 14 and Figure 15 In some examples, the energy storage structure 31 includes a first torsion spring 313, a second torsion spring 314, and a connecting rod 315. The first torsion spring 313 and the second torsion spring 314 are arranged at intervals, and the connecting rod 315 connects the first torsion spring 313 and the second torsion spring 314. The first torsion spring 313 and the second torsion spring 314 are each provided with independent first force arms 311 and second force arms 312. The first lap joint 33 is provided with two first lap joints 33, which abut against the two first force arms 311 one by one. The connecting rod 315 connects the two second force arms 312, and the connecting rod 315 abuts against the second lap joint 42.
[0107] Based on the above-mentioned embodiments of the present application, by arranging the first torsion spring 313 and the second torsion spring 314 and connecting them into a whole through the connecting rod 315, the movable contact 4 can be arranged between the first torsion spring 313 and the second torsion spring 314. This can improve the energy storage effect of the energy storage structure 31, so that the energy storage structure 31 can exert a large enough force on the movable contact 4 when it is reset, to improve the speed of the movable contact 4 rotating to the closed position, and achieve the purpose of quick closing.
[0108] Specifically, the first torsion spring 313 and the second torsion spring 314 are arranged at intervals, the first torsion spring 313 is located between the movable contact 4 and a first mounting plate 321, the first mounting plate 321 is provided with a first lapping portion 33, and a first force arm 311 of the first torsion spring 313 abuts against the first lapping portion 33 on the first mounting plate 321. The second torsion spring 314 is located between the movable contact 4 and a second mounting plate 322, the second mounting plate 322 is also provided with a first lapping portion 33, and a first force arm 311 of the second torsion spring 314 abuts against the first lapping portion 33 on the second mounting plate 322.
[0109] With reference to Figure 15 , the second force arm 312 of the first torsion spring 313 and the second force arm 312 of the second torsion spring 314 are connected through a connecting rod 315, the connecting rod 315 abuts against a second lapping portion 42 on the movable contact 4, when the movable contact 4 and the buffer 5 are locked with each other, the linkage 3 continues to rotate with the handle 2 and drives the two first force arms 311 on the energy storage structure 31 to act, so as to simultaneously store energy of the first torsion spring 313 and the second torsion spring 314, and effectively improve the energy storage efficiency.
[0110] When the movable contact 4 and the buffer 5 are relatively unlocked, the first torsion spring 313 and the second torsion spring 314 are simultaneously released, the first force arms 311 of the first torsion spring 313 and the second torsion spring 314 are kept unmoved, and the movable contact 4 is pushed to rotate quickly to a position close to the static contact through cooperation of the connecting rod 315 and the second lapping portion 42, so as to realize quick conduction of the movable contact 4 and the static contact.
[0111] In some examples, with reference to Figure 4 , the first locking portion 41 is arranged as a locking groove, and the second locking portion 52 is arranged as a locking boss. In other examples, the first locking portion 41 is arranged as a locking boss, and the second locking portion 52 is arranged as a locking groove. The locking groove and the locking boss are correspondingly locked.
[0112] Based on the above-mentioned embodiments of the present application, the locking groove and the locking boss are mutually lapped to realize the cooperation form of locking, which has the characteristics of simple structure and convenient manufacturing. The locking stability of the locking groove and the locking boss is relatively high, and the mutual unlocking is relatively smooth, which is beneficial to improve the stability of the closing process.
[0113] In the present embodiment, the first locking portion 41 is arranged as a locking groove, and the second locking portion 52 is arranged as a locking boss. The first locking portion 41 is arranged on a side wall of the movable contact 4 close to the buffer 5, and the second locking portion 52 is arranged on a side wall of the first arm 54 close to the movable contact 4.
[0114] The buffer 5 is always abutted against the side wall where the first locking portion 41 is arranged under the elastic pre-tightening force of the elastic member 53. When the movable contact 4 is rotated to the first locking portion 41 corresponding to the second locking portion 52, the buffer 5 is rotated under the elastic pre-tightening force, so that the first arm 54 is further close to the movable contact 4, thereby making the second locking portion 52 inserted into the first locking portion 41, and achieving mutual locking.
[0115] When the handle 2 exerts force on the buffer 5, the buffer 5 is rotated, so that the first arm 54 is away from the movable contact 4, thereby making the second locking portion 52 disengaged from the first locking portion 41, and achieving mutual unlocking.
[0116] The above only describes the preferred embodiments of the present application and is not used to limit the present application. Various modifications and changes can be made by those skilled in the art based on the spirit and principles of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A fast closing mechanism for a circuit breaker, characterized in that, The circuit breaker includes a housing, and the circuit breaker fast closing mechanism includes: The handle is rotatably mounted on the housing; A linkage component is rotatably mounted on the housing, the linkage component is connected to the handle in a transmission manner, and an energy storage structure is provided on the linkage component; A moving contact is rotatably mounted on the housing and connected to the energy storage structure, and a first locking part is provided on the moving contact; The buffer includes a rotating part and a second locking part. The rotating part is rotatably connected to the housing. The second locking part is disposed on the side of the rotating part near the first locking part. An elastic element is disposed on the rotating part. The elastic element can provide an elastic preload to maintain the relative locking between the first locking part and the second locking part. During the circuit breaker closing process, the handle drives the linkage to rotate, and the linkage drives the moving contact to rotate through the energy storage structure. Then, the first locking part and the second locking part lock relative to each other, and the linkage continues to rotate relative to the moving contact and stores energy in the energy storage structure. As the handle continues to rotate, it can unlock the first locking part and the second locking part. The energy storage structure stops storing energy and quickly resets so that the moving contact can quickly rotate to the closed position.
2. The circuit breaker fast closing mechanism according to claim 1, characterized in that, The buffer also includes a first arm and a second arm. The first arm is disposed on the side of the rotating part near the moving contact, and the second arm is disposed on the side of the rotating part near the handle. The second locking part is disposed on the first arm, and the elastic element acts on the first arm to make the second locking part tend to approach and lock relative to the first locking part.
3. The circuit breaker fast closing mechanism according to claim 2, characterized in that, The rotating part is provided with a mounting groove. The elastic element includes a main body, a first torsion arm and a second torsion arm. The main body is installed in the mounting groove. The first torsion arm and the second torsion arm are spaced apart on the main body. The first torsion arm extends out of the mounting groove and partially abuts against the first arm. The second torsion arm extends out of the mounting groove and partially abuts against the housing.
4. The circuit breaker fast closing mechanism according to claim 3, characterized in that, The mounting groove has a first limiting groove and a second limiting groove on its groove wall. Both the first limiting groove and the second limiting groove are connected to the mounting groove. The first torsion arm is installed in the first limiting groove and the second torsion arm is installed in the second limiting groove.
5. The circuit breaker fast closing mechanism according to claim 3, characterized in that, The first arm has an abutment portion on the side near the rotating part, and the first torsion arm abuts against the abutment portion.
6. The circuit breaker fast closing mechanism according to claim 3, characterized in that, The housing is provided with a blocking wall, and the side of the blocking wall near the buffer is provided with a guide surface. The second torsion arm can move along the guide surface and abut against the blocking wall.
7. The circuit breaker fast closing mechanism according to any one of claims 2-6, characterized in that, The second arm is provided with 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 receiving part can be pushed by the pushing part, so as to drive the rotating part to rotate through the receiving part.
8. The circuit breaker fast closing mechanism according to any one of claims 1-6, characterized in that, The linkage includes a receiving cavity and a first overlapping part, and the moving contact is provided with a second overlapping part. The energy storage structure and part of the moving contact are all disposed in the receiving cavity. The energy storage structure includes a first lever arm and a second lever arm that are spaced apart. The first lever arm abuts against the first overlapping part, and the second lever arm abuts against the second overlapping part. After the first locking part and the second locking part are locked relative to each other, the handle continues to drive the linkage 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 fast closing mechanism according to claim 8, characterized in that, The energy storage structure 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. There are two first overlapping parts, and the two first overlapping parts abut against the two first lever arms in a one-to-one correspondence. The connecting rod connects the two second lever arms and abuts against the second overlapping parts.
10. The circuit breaker fast closing mechanism according to any one of claims 1-6, characterized in that, The first locking part is configured as a locking groove, and the second locking part is configured as a locking boss; Alternatively, the first locking part can be configured as a locking boss, and the second locking part can be configured as a locking groove, with the locking groove corresponding to and locking the locking boss.