Operating mechanism and circuit breaker

Abstract

The utility model belongs to the technical field of low-voltage electric appliances, and discloses an operating mechanism and a circuit breaker. The operating mechanism comprises a shell, a long shaft, two contact supports, a first transmission frame, a second transmission frame and a handle. The two ends of the long shaft are installed on the two opposite side walls of the shell. The two contact supports are rotatably installed on the long shaft and have a closing position and an opening position. The first transmission frame and the second transmission frame are both rotatably mounted on the long shaft, and the first transmission frame rotates along a first direction to enable the contact support to move to a switching-on position and rotates along a second direction to enable the contact support to move to a switching-off position; the second transmission frame can push the first transmission frame to rotate in the second direction under the action of the bimetal or the push rod; the handle is rotationally installed on the shell and used for enabling the first transmission frame to rotate in the first direction and enabling the second transmission frame to rotate in the second direction under driving of external force. According to the operating mechanism, the two phases of operating mechanisms of the circuit breaker are integrated, so that the use of parts is reduced, and the synchronism among the phases is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to an operating mechanism and a circuit breaker. Background Art

[0002] A circuit breaker is a protection device for a low-voltage circuit, having overload, short-circuit and under-voltage protection functions. The circuit breaker mainly includes a contact system, an operating mechanism and a release, and the operating mechanism is used to control the opening and closing between the moving and static contacts in the contact system.

[0003] When two or more phases are provided in the existing circuit breaker, the contact systems and operating mechanisms of each phase are independently designed and assembled, and the assembly efficiency is low. Moreover, since each phase is independent of each other, the synchronism between each phase is poor, and there is a risk of phase loss and burnout of the circuit breaker, resulting in a low switching breaking capacity of the circuit breaker and a large potential safety and quality hazard.

[0004] Therefore, it is urgent to propose an operating mechanism and a circuit breaker to solve the above technical problems. Summary of the Utility Model

[0005] According to one aspect of the utility model, the utility model provides an operating mechanism, which integrates the operating mechanisms of two phases of the circuit breaker, reduces the use of parts, lowers the cost, and is also convenient for assembly. Moreover, through a single handle, the synchronous movement of the moving contacts of multiple phases can be controlled, the synchronism between each phase is improved, and thus the switching breaking capacity and the use safety of the circuit breaker are improved.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The operating mechanism includes:

[0008] A housing;

[0009] A long shaft, the two ends of which are installed on the opposite side walls of the housing;

[0010] Two contact supports, both rotatably installed on the long shaft, and a moving contact is provided at one end of each contact support. The contact support has a closing position and an opening position to make the moving contact contact or separate from the static contact;

[0011] A first transmission frame, rotatably installed on the long shaft. When the first transmission frame rotates in the first direction, the two contact supports can be synchronously moved to the closing position, and when the first transmission frame rotates in the second direction, the two contact supports can be synchronously moved to the opening position;

[0012] The second transmission bracket is rotatably mounted on the long shaft. The second transmission bracket can rotate along the second direction under the action of the double metal or the push rod of the circuit breaker to contact the first transmission bracket, and push the first transmission bracket to rotate along the second direction.

[0013] The handle is rotatably mounted on the housing. The handle is used to drive the first transmission bracket to rotate along the first direction under the action of an external force, and drive the second transmission bracket to rotate along the second direction under the action of an external force.

[0014] Optionally, an elastic energy storage member is mounted on each contact support. One end of the elastic energy storage member abuts against the contact support, and the other end can abut against the first transmission bracket. When the first transmission bracket rotates along the first direction, the elastic energy storage member can be compressed, and the contact support is driven to rotate along the first direction through the elastic energy storage member.

[0015] Optionally, the operating mechanism further includes a rocker arm connected to the handle. The rocker arm includes an energy storage surface and a tripping drive surface connected in sequence. A linkage arm is provided on each contact support, and an energy storage mating surface and a tripping mating surface are sequentially provided at the end of the linkage arm.

[0016] During the process of the handle driving the first transmission bracket to rotate along the first direction, the rocker arm can be driven to rotate along the first direction, and the energy storage surface is in sliding fit with the energy storage mating surface. During the sliding fit process of the energy storage surface and the energy storage mating surface, the rotation of the contact support stops, and the elastic energy storage member is continuously compressed for energy storage. When the energy storage surface disengages from the energy storage mating surface, the elastic energy storage member releases energy to enable the contact support to quickly move to the closing position.

[0017] During the process of the handle driving the second transmission bracket to move along the second direction, the rocker arm can be driven to rotate along the second direction, the tripping drive surface contacts the tripping mating surface, and the contact support is pushed to rotate along the second direction through the tripping mating surface.

[0018] Optionally, the energy storage surface is an arc surface.

[0019] Optionally, the handle includes a bushing rotatably connected to the housing and a driving handle connected to the bushing. A rotation stop surface is provided on the driving handle. The rocker arm is sleeved on the bushing, and a limiting rib is provided on the rocker arm. The limiting rib can abut against the rotation stop surface to limit the relative rotation of the rocker arm with respect to the handle.

[0020] Optionally, the moving contact includes a contact body and a moving contact disposed at one end of the contact body away from the contact support. A curved surface is provided on the side of the contact body where the moving contact is provided, and the curved surface is used to increase the creepage distance of the arc.

[0021] Optionally, the operating mechanism further includes a reset elastic member. One end of the reset elastic member is connected to the housing, and the other end is connected to the first transmission frame. The reset elastic member is configured to always have a tendency to push the first transmission frame to rotate in the second direction.

[0022] Optionally, the operating mechanism further includes a handle elastic member mounted on the handle. One end of the handle elastic member is connected to the handle, and the other end is connected to the second transmission frame. When the handle drives the first transmission frame to rotate in the first direction, the handle elastic member is compressed.

[0023] Optionally, a first connection hole is provided on the first transmission frame, and a connection rib is provided on the second transmission frame. The connection rib is movably inserted into the first connection hole.

[0024] Optionally, the operating mechanism further includes a handle link. One end of the handle link is rotatably connected to the handle, and the other end is disposed between the first transmission frame and the second transmission frame. The other end of the handle link can push the first transmission frame to rotate in the first direction and push the second transmission frame to rotate in the second direction.

[0025] Optionally, the operating mechanism further includes a bimetal link corresponding to each moving contact. Sliding grooves corresponding to the bimetal links are provided on both sides of the housing. A part of the bimetal link is slidably disposed in the corresponding sliding groove. Second connection holes corresponding to the bimetal links are provided on both sides of the second transmission frame. One end of the bimetal link outside the sliding groove is connected to one bimetal, and the other end of the bimetal link outside the sliding groove is movably connected to the second connection hole. The bimetal can drive the bimetal link to move through deformation, so that the bimetal link drives the second transmission frame to rotate in the second direction.

[0026] Optionally, a plurality of corresponding protrusions are provided on the opposite inner walls of the sliding groove, and the two oppositely arranged protrusions are respectively slidably attached to the opposite sides of the bimetal link.

[0027] According to another aspect of the present invention, the present invention further provides a circuit breaker, including a contact system and the operating mechanism according to any one of the above technical solutions. The contact system includes at least two moving contacts, and two of the moving contacts are respectively connected to two contact supports of the operating mechanism.

[0028] Advantages of the present utility model:

[0029] The present utility model provides an operating mechanism, including a housing, a long shaft, two contact supports, a first transmission frame, a second transmission frame, and a handle. When closing, rotating the handle will drive the first transmission frame to rotate in a first direction. The rotation of the first transmission frame in the first direction will cause the contact support to move to the closing position, enabling the moving contact to contact the static contact to achieve closing. When manually opening, rotating the handle will drive the second transmission frame to rotate in a second direction, causing the second transmission frame to push the first transmission frame to rotate in the second direction. The rotation of the first transmission frame in the second direction will cause the contact support to move to the opening position, separating the moving contact from the static contact to achieve opening. When the current is overloaded or short-circuited, the bimetal or push rod of the circuit breaker will drive the second transmission frame to rotate in the second direction in the same way as the handle to achieve opening. This operating mechanism integrates two contact supports to drive them together, improving the synchronization of the movements of the two moving contacts connected to the contact supports, reducing the risk of single-phase burnout of the circuit breaker, and thus improving the switching breaking capacity and usage safety of the circuit breaker.

[0030] Through the transmission between the handle and the first transmission frame, and the transmission between the handle, bimetal, and push rod and the second transmission frame, the closing and opening of the circuit breaker can be achieved, eliminating the complex locking and tripping structures in the prior art, reducing the use of components, lowering the cost, and facilitating assembly.

[0031] When this operating mechanism is used in a circuit breaker, it can be directly installed as a whole in two phases of the circuit breaker. Compared with the independent setting of the operating mechanism for each phase of the circuit breaker, the assembly efficiency of the circuit breaker is improved.

[0032] The present utility model also provides a circuit breaker, including a contact system and the above-mentioned operating mechanism. Since this circuit breaker adopts the above-mentioned operating mechanism, it has a simple structure, relatively high production efficiency, and relatively high switching breaking capacity and usage safety. Description of the Drawings

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments of the present utility model. Obviously, the following-described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the content of the embodiments of the present utility model and these drawings.

[0034] Figure 1 It is an exploded view of the operating mechanism provided by the embodiment of the present utility model;

[0035] Figure 2 It is a cross-sectional view of the operating mechanism provided by the embodiment of the present utility model;

[0036] Figure 3 Schematic diagram of the opening of the operating mechanism from a perspective provided by an embodiment of the present utility model (part of the housing is hidden);

[0037] Figure 4 Schematic diagram of the opening of the operating mechanism from another perspective provided by an embodiment of the present utility model;

[0038] Figure 5 Schematic diagram of the closing of the operating mechanism provided by an embodiment of the present utility model;

[0039] Figure 6 is Figure 5 An enlarged view at A;

[0040] Figure 7 Schematic diagram of the operating mechanism with the housing hidden provided by an embodiment of the present utility model Figure 1 ;

[0041] Figure 8 Schematic diagram of the operating mechanism with the housing hidden provided by an embodiment of the present utility model Figure 2 ;

[0042] Figure 9 Assembly drawing of the handle, handle connecting rod and first transmission frame provided by an embodiment of the present utility model;

[0043] Figure 10 Assembly drawing of the handle and rocker arm provided by an embodiment of the present utility model.

[0044] In the figure:

[0045] 10, moving contact; 11, contact body; 12, moving contact point; 13, curved surface;

[0046] 100, housing; 101, chute; 102, protrusion; 110, first sub-housing; 111, insertion hole; 120, second sub-housing; 121, insertion post;

[0047] 200, long shaft;

[0048] 300, contact support; 310, linkage arm; 311, energy storage mating surface; 312, opening mating surface;

[0049] 400, first transmission frame; 410, first transmission surface; 420, first avoidance opening; 430, first connection hole;

[0050] 500, second transmission frame; 510, second transmission surface; 520, second avoidance opening; 530, connecting rib; 540, second connection hole;

[0051] 600, handle; 610, bushing; 620, driving handle; 621, rotation stop surface;

[0052] 700, Elastic energy storage component;

[0053] 800, Rocker arm; 810, Energy storage surface; 820, Shunt drive surface; 830, Limit rib;

[0054] 900, Reset elastic component;

[0055] 1000, Handle elastic component;

[0056] 1100, Handle connecting rod;

[0057] 1200, Bimetal connecting rod. Specific embodiments

[0058] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0059] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0060] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below", and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the horizontal height of the first feature is lower than that of the second feature.

[0061] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "left", and "right" are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and do not have any special meaning.

[0062] This embodiment provides an operating mechanism. By integrating the two-phase operating mechanisms of the circuit breaker, the use of components is reduced, the cost is lowered, and assembly is also facilitated. Moreover, through a single handle, the synchronous movement of the multi-phase moving contacts can be controlled, improving the synchronism between phases, and thus enhancing the switching breaking capacity and service safety of the circuit breaker.

[0063] Specifically, as Figures 1 - 5 shown, the operating mechanism includes a housing 100, a long shaft 200, two contact supports 300, a first transmission frame 400, a second transmission frame 500, and a handle 600.

[0064] Among them, both ends of the long shaft 200 are installed on the opposite side walls of the housing 100. The two contact supports 300 are both rotatably installed on the long shaft 200. One end of each contact support 300 is provided with a moving contact 10. The contact support 300 has a closing position and a tripping position, so that the moving contact 10 contacts or separates from the static contact. That is, when the contact support 300 is in the closing position, it drives the moving contact 10 thereon to contact the static contact, and when the contact support 300 is in the tripping position, it drives the moving contact 10 thereon to separate from the static contact. The first transmission frame 400 is rotatably installed on the long shaft 200. When the first transmission frame 400 rotates in the first direction, it can make the two contact supports 300 move synchronously to the closing position, and when the first transmission frame 400 rotates in the second direction, it can make the two contact supports 300 move synchronously to the tripping position. The second transmission frame 500 is rotatably installed on the long shaft 200. The second transmission frame 500 can rotate in the second direction under the action of the double metal or push rod of the circuit breaker to contact the first transmission frame 400 and push the first transmission frame 400 to rotate in the second direction. The handle 600 is rotatably installed on the housing 100. The handle 600 is used to make the first transmission frame 400 rotate in the first direction under the drive of an external force, and to make the second transmission frame 500 rotate in the second direction under the drive of an external force.

[0065] In this embodiment, the first direction is the counterclockwise direction, and the second direction is the clockwise direction.

[0066] The working principle of this operating mechanism is as follows:

[0067] When closing, rotate the handle 600. The handle 600 will drive the first transmission frame 400 to rotate in the first direction (counterclockwise). The rotation of the first transmission frame 400 in the first direction will cause the two contact supports 300 to also rotate in the first direction until the two contact supports 300 move to the closing position, making the moving contact 10 contact with the static contact to achieve closing.

[0068] When manually opening, rotate the handle 600. The handle 600 will drive the second transmission frame 500 to rotate in the second direction (clockwise). The rotation of the second transmission frame 500 in the second direction will contact the first transmission frame 400. As the second transmission frame 500 further rotates in the second direction, the first transmission frame 400 will be pushed by the second transmission frame 500 to rotate together in the second direction. The rotation of the first transmission frame 400 in the second direction will cause the two contact supports 300 to also rotate in the second direction until the two contact supports 300 move to the opening position, making the moving contact 10 separate from the static contact to achieve opening.

[0069] Overload protection: When the current is overloaded, the bimetal of the circuit breaker will deform, and through the deformation, it will drive the second transmission frame 500 to rotate in the second direction. The rotation of the second transmission frame 500 in the second direction will contact the first transmission frame 400 and drive the first transmission frame 400 to rotate in the second direction, so that the two contact supports 300 move to the opening position, realizing the separation of the moving contact 10 and the static contact to achieve overload protection.

[0070] Short-circuit protection: When the circuit breaker is short-circuited, the push rod of the electromagnetic system in the circuit breaker will move quickly under the drive of the moving iron core, and push the second transmission frame 500 to rotate in the second direction. The rotation of the second transmission frame 500 in the second direction will contact the first transmission frame 400 and drive the first transmission frame 400 to rotate in the second direction, so that the two contact supports 300 move to the opening position, realizing the separation of the moving contact 10 and the static contact to achieve short-circuit protection.

[0071] This operating mechanism integrates the two contact supports 300 together for common drive, enabling the synchronous movement of the multi-phase moving contacts 10 to be controlled by a single handle 600, improving the synchronism between phases, reducing the risk of phase loss and burnout of the circuit breaker, and thus enhancing the switching breaking capacity and service safety of the circuit breaker. Through the transmission between the handle 600 and the first transmission frame 400, and the transmission between the handle 600, the bimetal and the push rod and the second transmission frame 500, the closing and opening of the circuit breaker can be achieved, eliminating the complex locking and tripping structures in the prior art, reducing the use of components, lowering the cost, and also facilitating assembly. When this operating mechanism is used in a circuit breaker, it can be directly installed in two phases of the circuit breaker as a whole. Compared with the independent setting of the operating mechanism for each phase of the circuit breaker, the assembly efficiency of the circuit breaker is improved.

[0072] Further, continue to refer to Figure 2, in this embodiment, a first transmission surface 410 is provided on one side of the first transmission frame 400 close to the second transmission frame 500, and a second transmission surface 510 is provided on one side of the second transmission frame 500 close to the first transmission frame 400. When the first transmission frame 400 rotates in the first direction (counterclockwise), the first transmission surface 410 will contact the second transmission surface 510 to push the second transmission frame 500 to rotate in the first direction. When the second transmission frame 500 rotates in the second direction (clockwise), the second transmission surface 510 will contact the first transmission surface 410 to push the first transmission frame 400 to rotate in the second direction.

[0073] Optionally, continue to refer to Figure 1 , in this embodiment, the housing 100 includes a first sub-housing 110 and a second sub-housing 120. The first sub-housing 110 and the second sub-housing 120 are snap-connected, and both ends of the long shaft 200 are respectively connected to the first sub-housing 110 and the second sub-housing 120. The structure of the housing 100 is simple, and installation and disassembly are relatively convenient.

[0074] Furthermore, continue to refer to Figure 1 , in this embodiment, one of the first sub-housing 110 and the second sub-housing 120 is provided with a plug post 121, and the other is provided with a plug hole 111. The plug post 121 is inserted into the plug hole 111, and the handle 600 is rotatably sleeved on the plug post 121.

[0075] Furthermore, continue to refer to Figures 1 - 4 , the operating mechanism further includes a reset elastic member 900. One end of the reset elastic member 900 is connected to the housing 100, and the other end is connected to the first transmission frame 400. The reset elastic member 900 is configured to always have a tendency to push the first transmission frame 400 to rotate in the second direction. By providing the reset elastic member 900, the contact support 300 can be quickly moved to the opening position through the elastic restoring force, achieving the purpose of quick opening.

[0076] Optionally, in this embodiment, bosses are provided on both the first sub-housing 110 and the first transmission frame 400. The reset elastic member 900 is a spring, and both ends of the spring are respectively sleeved on the corresponding bosses. Installing the spring through the bosses has a simple structure, is convenient for assembly, and has relatively high connection reliability.

[0077] Furthermore, continue to refer to Figure 1 and Figure 3, the operating mechanism further includes a handle elastic member 1000 installed on the handle 600. One end of the handle elastic member 1000 is connected to the handle 600, and the other end is connected to the second transmission frame 500. When the handle 600 drives the first transmission frame 400 to rotate in the first direction, the handle elastic member 1000 is compressed. With such a setting, during the closing process of the operating mechanism, the handle elastic member 1000 is compressed to store elastic potential energy, so that during the opening process of the operating mechanism, the handle 600 can be quickly returned to the opening position through the elastic restoring force. Moreover, connecting the other end of the handle elastic member 1000 to the adjacent second transmission frame 500 is beneficial to shortening the length of the end of the handle elastic member 1000, with a reasonable and compact layout.

[0078] Optionally, in this embodiment, the handle elastic member 1000 is a torsion spring.

[0079] Furthermore, as Figure 7 shown, a first connection hole 430 is provided on the first transmission frame 400, and a connection rib 530 is provided on the second transmission frame 500. The connection rib 530 is movably inserted into the first connection hole 430. Through the cooperation of the first connection hole 430 and the connection rib 530, the reliability of the transmission connection between the first transmission frame 400 and the second transmission frame 500 is improved.

[0080] Furthermore, as Figure 1 、 Figure 8 and Figure 9 shown, the operating mechanism further includes a handle link 1100. One end of the handle link 1100 is rotatably connected to the handle 600, and the other end is disposed between the first transmission frame 400 and the second transmission frame 500. The other end of the handle link 1100 can push the first transmission frame 400 to rotate in the first direction and push the second transmission frame 500 to rotate in the second direction. The driving between the handle 600 and the first transmission frame 400 and the second transmission frame 500 is realized through the handle link 1100, with a simple structure and convenient control. Moreover, the other end of the handle link 1100 only needs to be disposed between the first transmission frame 400 and the second transmission frame 500, and there is no need to set other structures for fixing the handle link 1100, further simplifying the structure of the operating mechanism and facilitating the assembly of the operating mechanism.

[0081] Specifically, in this embodiment, when the handle 600 rotates in the second direction (clockwise direction), it will push the handle link 1100, causing the handle link 1100 to push the first transmission frame 400 to rotate in the first direction (counterclockwise direction). When the handle 600 rotates in the first direction (counterclockwise direction), it will pull the handle link 1100, causing the handle link 1100 to pull the second transmission frame 500 to rotate in the second direction (clockwise direction).

[0082] Optionally, in this embodiment, the handle link 1100 is in a "U" shape.

[0083] Further, continue to refer to Figure 1 、 Figure 4 and Figure 5 , the operating mechanism further includes a bimetal link 1200 corresponding to the moving contact 10 one by one. Chutes 101 corresponding to the bimetal links 1200 one by one are provided on both sides of the housing 100. A part of the bimetal link 1200 is slidably disposed in the corresponding chute 101. Second connection holes 540 corresponding to the bimetal links 1200 one by one are provided on both sides of the second transmission frame 500. One end of the bimetal link 1200 outside the chute 101 is connected to a bimetal, and the other end of the bimetal link 1200 outside the chute 101 is movably connected to the second connection hole 540. The bimetal can drive the bimetal link 1200 to move through deformation, so that the bimetal link 1200 drives the second transmission frame 500 to rotate in the second direction. The bimetal deformation is used to drive the second transmission frame 500 to rotate in the second direction through the bimetal link 1200, and the structure is simple and easy to control. Moreover, by providing the chute 101 on the housing 100 to fix the bimetal link 1200, the movement of the bimetal link 1200 can be guided, the reliability of the movement of the bimetal link 1200 under the pull of bimetal deformation is improved, and further the reliability of the overload protection of the operating mechanism is improved. By providing the other end of the bimetal link 1200 to be movably connected to the second connection hole 540, the second transmission frame 500 will not be driven to rotate in the second direction when the bimetal has a small deformation, and the second transmission frame 500 will be driven to rotate in the second direction only when the bimetal has a large deformation due to an overload situation, which improves the reliability of the overload protection of the circuit breaker.

[0084] In a possible embodiment, the opposite inner walls of the chute 101 are slidably attached to the opposite sides of the bimetal link 1200. With such a setting, the bimetal link 1200 can be prevented from shaking in the chute 101, so that the bimetal link 1200 can move reliably along the extension direction of the chute 101, and the guiding effect of the chute 11 on the bimetal link 1200 is improved.

[0085] Continue to refer to Figure 5, in another possible embodiment, a plurality of corresponding protrusions 102 are provided on the opposite inner walls of the chute 101, and two oppositely arranged protrusions 102 are respectively slidably attached to the opposite sides of the bimetallic link 1200. That is, the two oppositely arranged protrusions 102 can limit the shaking of the bimetallic link 1200 in the chute 101, so that the bimetallic link 1200 can reliably move along the extending direction of the chute 101, improving the guiding effect of the chute 11 on the bimetallic link 1200. Moreover, compared with the entire inner wall of the chute 101 being in contact with the bimetallic link 1200, the contact area between the protrusion 102 and the bimetallic link 1200 is greatly reduced, making the friction between the protrusion 102 and the bimetallic link 1200 smaller, improving the smoothness of the movement of the bimetallic link 1200, and further improving the reliability of the bimetallic drive to rotate the second transmission frame 500.

[0086] Optionally, the number of protrusions 102 on one inner wall of the chute 101 can be one, two, three, etc., which can be set according to actual needs, and the present application does not make specific limitations.

[0087] Further, continue to refer to Figure 5 , in this embodiment, the end of the protrusion 102 is provided with an arc surface, and the arc surface is slidably attached to the bimetallic link 1200. With such a setting, the contact between the protrusion 102 and the bimetallic link 1200 is a line contact, further reducing the contact area between the protrusion 102 and the bimetallic link 1200, and further improving the smoothness of the movement of the bimetallic link 1200.

[0088] Further, continue to refer to Figure 7 , an elastic energy storage member 700 is installed on each contact support 300. One end of the elastic energy storage member 700 abuts against the contact support 300, and the other end can abut against the first transmission frame 400. When the first transmission frame 400 rotates in the first direction, it can compress the elastic energy storage member 700, and drive the contact support 300 to rotate in the first direction through the elastic energy storage member 700. That is, the first transmission frame 400 drives the contact support 300 to rotate in the first direction through the elastic energy storage member 700 to realize the contact between the moving contact and the static contact. In this process, the elastic energy storage member 700 is compressed by the first transmission frame 400 to store elastic potential energy, and can make the moving contact 10 have a certain over-travel movement under the action of the elastic restoring force. Thus, even if the moving contact 10 or the static contact is slightly burned, the reliable contact between the moving contact 10 and the static contact can be ensured, improving the reliability of the circuit breaker operation. When opening the circuit, the first transmission frame 400 rotates in the second direction and no longer presses the elastic energy storage member 700. At this time, the elastic energy storage member 700 releases the stored elastic potential energy, so that the contact support 300 quickly moves to the opening position to realize the separation of the moving contact 10 and the static contact.

[0089] Optionally, each elastic energy storage member 700 on the contact support 300 is installed at one end far from the other contact support 300 and is symmetrically arranged. This arrangement makes the structure of the operating mechanism relatively compact, easy to assemble, and aesthetically pleasing as a whole.

[0090] Optionally, continuing to refer to Figure 7 , the elastic energy storage member 700 can be a torsion spring. The torsion spring is sleeved on the contact support 300. One end of the torsion spring is clamped to the contact support 300, and the other end can abut against the first transmission frame 400.

[0091] Furthermore, as shown in Figures 1 - 3 , Figure 6 and Figures 8 - 10 , the operating mechanism further includes a rocker arm 800 connected to the handle 600. The rocker arm 800 includes an energy storage surface 810 and a tripping drive surface 820 connected in sequence. A linkage arm 310 is provided on each contact support 300. The end of the linkage arm 310 is provided with an energy storage mating surface 311 and a tripping mating surface 312 connected in sequence.

[0092] As shown in Figure 3 , during the process of the handle 600 driving the first transmission frame 400 to rotate a first angle in the first direction, the handle 600 will drive the rocker arm 800 to rotate in the first direction. During this process, the energy storage surface 810 is not in contact with the energy storage mating surface 311, and the first transmission frame 400 will compress the elastic energy storage member 700, causing the elastic energy storage member 700 to store elastic potential energy. During the process of the handle 600 driving the first transmission frame 400 to further rotate a second angle in the first direction, the handle 600 will drive the rocker arm 800 to continue to rotate a second angle in the first direction. During this process, the energy storage surface 810 and the energy storage mating surface 311 are in sliding fit to limit the rotation of the contact support 300, so that the contact support 300 stops rotating, but the first transmission frame 400 will continuously compress the elastic energy storage member 700 through rotation. During the process of the handle 600 driving the first rotating frame 400 to further rotate a third angle in the first direction, it will drive the energy storage surface 810 on the rocker arm 800 to disengage from the energy storage mating surface 311. When the energy storage surface 810 disengages from the energy storage mating surface 311, the restriction on the rotation of the contact support 300 will be released. At this time, the elastic energy storage member 700 releases a part of its elastic potential energy to make the contact support 300 quickly move to the closing position. This arrangement, compared with the scheme where the contact support 300 always moves synchronously with the first transmission frame 400, takes less time for closing and improves the closing efficiency.

[0093] As shown in Figure 6As shown, during the process of the handle 600 driving the second transmission frame 500 to move in the second direction, the rocker arm 800 will be driven to rotate synchronously in the second direction, so that the opening driving surface 820 on the rocker arm 800 first contacts the opening mating surface 312, and the contact support 300 is pushed to rotate through the opening mating surface 312, so that the contact support 300 drives the moving contact 10 to quickly disengage from the dead point position. With such a setting, the opening efficiency can be improved, thereby reducing the risk of welding between the moving contact 10 and / or the static contact, and improving the reliability of the circuit breaker opening.

[0094] Optionally, in this embodiment, the energy storage surface 810 is an arc surface.

[0095] Optionally, continue to refer to Figure 8 and Figure 9 , in this embodiment, a first avoidance opening 420 is provided on the first transmission frame 400, a second avoidance opening 520 is provided on the second transmission frame 500, and the linkage arm 310 is inserted through the first avoidance opening 420 and the second avoidance opening 520. The settings of the first avoidance opening 420 and the second avoidance opening 520 enable the linkage arm 310 to directly extend out to cooperate with the rocker arm 800, which is beneficial to simplifying the structure of the operating mechanism.

[0096] Furthermore, continue to refer to Figure 10 , the handle 600 includes a bushing 610 rotatably connected to the housing 100 and a driving handle 620 connected to the bushing 610. A rotation stop surface 621 is provided on the driving handle 620. The rocker arm 800 is sleeved on the bushing 610, and a limiting rib 830 is provided on the rocker arm 800. The limiting rib 830 can abut against the rotation stop surface 621 to limit the relative rotation of the rocker arm 800 with respect to the handle 600. By setting the cooperation between the limiting rib 830 and the rotation stop surface 621, the rocker arm 800 can rotate with the handle 600, improving the reliability of the operation of the handle 600 driving the rocker arm 800 to rotate, and having a simple structure and convenient assembly between the rocker arm 800 and the handle 600.

[0097] In this embodiment, the handle 600 is rotatably sleeved on the insertion post 121 through the bushing 610.

[0098] Furthermore, continue to refer to Figure 3 , the moving contact 10 includes a contact body 11 and a moving contact 12 provided at one end of the contact body 11 away from the contact support 300. A curved surface 13 is provided on the side of the contact body 11 where the moving contact 12 is provided. The curved surface 13 is used to increase the creepage distance of the arc. By setting the curved surface 13, compared with the straight plane on the side of the contact body 11 where the moving contact 12 is provided in the prior art, the creepage distance of the arc is increased, the risk of the arc climbing up into the operating mechanism is reduced, and the operating mechanism is effectively protected.

[0099] Optionally, the surface 13 may be arc-shaped or wavy, etc., which can be set according to actual needs, and the present application does not make specific limitations.

[0100] This embodiment also provides a circuit breaker, including a contact system and the above-mentioned operating mechanism. The contact system includes at least two moving contacts 10, and two of the moving contacts 10 are respectively connected to two contact supports 300 of the operating mechanism.

[0101] Due to the adoption of the above-mentioned operating mechanism, this circuit breaker has a simple structure, high production efficiency, and high switching breaking capacity and use safety.

[0102] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. Operating mechanism, characterized in that: include: Housing (100); A long axis (200), with two ends of the long axis (200) mounted on opposite side walls of the housing (100); Two contact supports (300) are both rotatably mounted on the long shaft (200), one end of each of the contact supports (300) is provided with a moving contact (10), and the contact support (300) has a closing position and an opening position so that the moving contact (10) is in contact with or separated from the static contact; A first transmission frame (400) is rotatably mounted on the long shaft (200), wherein the first transmission frame (400) rotates in a first direction to enable the two contact supports (300) to move synchronously to the closing position, and the first transmission frame (400) rotates in a second direction to enable the two contact supports (300) to move synchronously to the opening position; A second transmission frame (500) is rotatably mounted on the long shaft (200); the second transmission frame (500) can rotate along the second direction under the action of the double metal or push rod of the circuit breaker to contact the first transmission frame (400) and push the first transmission frame (400) to rotate along the second direction; A handle (600) is rotatably mounted on the housing (100), and the handle (600) is used to rotate the first transmission frame (400) along the first direction under the driving force of an external force, and to rotate the second transmission frame (500) along the second direction under the driving force of an external force.

2. The operating mechanism according to claim 1, characterized in that: An elastic energy storage component (700) is mounted on each of the contact supports (300); one end of the elastic energy storage component (700) abuts against the contact support (300), and the other end can abut against the first transmission frame (400); the first transmission frame (400) can compress the elastic energy storage component (700) when rotating along the first direction, and drive the contact support (300) to rotate along the first direction through the elastic energy storage component (700).

3. The operating mechanism according to claim 2, characterized in that: The operating mechanism further comprises a rocker arm (800) connected to the handle (600), the rocker arm (800) comprising an energy storage surface (810) and a switch-off driving surface (820) connected in sequence, each of the contact supports (300) is provided with a linkage support arm (310), and the end of the linkage support arm (310) is provided with an energy storage matching surface (311) and a switch-off matching surface (312) connected in sequence; In the process of the handle (600) driving the first transmission frame (400) to rotate in the first direction, the rocker arm (800) can be driven to rotate in the first direction, and the energy storage surface (810) and the energy storage matching surface (311) are slidably matched. In the process of the energy storage surface (810) and the energy storage matching surface (311) being slidably matched, the contact support (300) stops rotating, and the elastic energy storage component (700) is continuously compressed to store energy. When the energy storage surface (810) is separated from the energy storage matching surface (311), the elastic energy storage component (700) releases energy to enable the contact support (300) to move quickly to the closing position. When the handle (600) drives the second transmission frame (500) to move in the second direction, the rocker arm (800) can be driven to rotate in the second direction, so that the opening gate driving surface (820) contacts the opening gate mating surface (312), and the contact support (300) is pushed to rotate in the second direction through the opening gate mating surface (312).

4. The operating mechanism according to claim 3, characterized in that: The energy storage surface (810) is an arc surface.

5. The operating mechanism according to claim 3, characterized in that: The handle (600) comprises a shaft sleeve (610) rotatably connected to the housing (100) and a driving handle (620) connected to the shaft sleeve (610); a rotation stop surface (621) is provided on the driving handle (620); the rocker arm (800) is sleeved on the shaft sleeve (610); a limiting rib (830) is provided on the rocker arm (800); the limiting rib (830) can abut against the rotation stop surface (621) to limit the rotation of the rocker arm (800) relative to the handle (600).

6. The operating mechanism according to claim 1, characterized in that: The moving contact (10) comprises a contact body (11) and a moving contact (12) arranged at one end of the contact body (11) away from the contact support (300), and a curved surface (13) is provided on one side of the contact body (11) where the moving contact (12) is provided, and the curved surface (13) is used to increase the creepage distance of an arc.

7. The operating mechanism according to claim 1, characterized in that: The operating mechanism further comprises a reset elastic member (900), one end of the reset elastic member (900) being connected to the housing (100), and the other end of the reset elastic member (900) being connected to the first transmission frame (400), and the reset elastic member (900) being configured to always have a tendency to push the first transmission frame (400) to rotate along the second direction.

8. The operating mechanism according to claim 1, characterized in that: The operating mechanism further comprises a handle elastic member (1000) mounted on the handle (600), one end of the handle elastic member (1000) being connected to the handle (600), and the other end of the handle elastic member (1000) being connected to the second transmission frame (500), and the handle (600) compresses the handle elastic member (1000) when driving the first transmission frame (400) to rotate along the first direction.

9. The operating mechanism according to claim 1, characterized in that: The first transmission frame (400) is provided with a first connection hole (430), and the second transmission frame (500) is provided with a connection convex rib (530), and the connection convex rib (530) is movably plugged into the first connection hole (430).

10. The operating mechanism according to any one of claims 1 to 9, characterized in that: The operating mechanism also includes a handle connecting rod (1100), one end of which is rotatably connected to the handle (600), and the other end of which is arranged between the first transmission frame (400) and the second transmission frame (500), and the other end of the handle connecting rod (1100) can push the first transmission frame (400) to rotate along the first direction, and push the second transmission frame (500) to rotate along the second direction.

11. The operating mechanism according to any one of claims 1 to 9, characterized in that: The operating mechanism also includes a double-metal connecting rod (1200) corresponding to the moving contact (10), and two sides of the shell (100) are provided with a slide groove (101) corresponding to the double-metal connecting rod (1200). Part of the double-metal connecting rod (1200) is slidably arranged in the corresponding slide groove (101). Two sides of the second transmission frame (500) are provided with second connecting holes (540) corresponding to the double-metal connecting rod (1200). One end of the double-metal connecting rod (1200) placed outside the slide groove (101) is connected to one of the double-metals, and the other end of the double-metal connecting rod (1200) placed outside the slide groove (101) is movably connected to the second connecting hole (540). The double-metal can drive the double-metal connecting rod (1200) to move through deformation, so that the double-metal connecting rod (1200) drives the second transmission frame (500) to rotate along the second direction.

12. The operating mechanism according to claim 11, characterized in that: A plurality of protrusions (102) corresponding to each other are arranged on two opposite inner walls of the slide groove (101), and two oppositely arranged protrusions (102) are respectively slidably attached to the opposite sides of the double metal connecting rod (1200).

13. A circuit breaker, characterized in that It comprises a contact system and an operating mechanism as claimed in any one of claims 1 to 12, wherein the contact system comprises at least two moving contacts (10), wherein the two moving contacts (10) are respectively connected to two contact supports (300) of the operating mechanism.

Images