Operating mechanism and circuit breaker
By introducing a limit protrusion and a reset spring into the circuit breaker operating mechanism, the problem of unstable traction rod angle was solved, thereby improving the reliability and efficiency of circuit breaker state switching.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2026-03-20
AI Technical Summary
In existing operating mechanisms, the rotation angle of the traction rod relative to the mounting bracket depends on manual adjustment, which is unstable and affects the reliability of the circuit breaker switching between different states.
By setting a limit protrusion and a return spring in the operating mechanism, the rotation angle of the traction rod relative to the mounting bracket is limited, and the friction is reduced by the arc surface cooperation, ensuring a stable connection between the traction rod and the mounting bracket.
This improves the reliability and efficiency of circuit breaker switching between different operating states, reduces the possibility of operational failure due to improper angle, and enhances the safety and reliability of circuit breaker use.
Smart Images
Figure CN224020713U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of low-voltage electrical apparatus, in particular to an operating mechanism and a circuit breaker. BACKGROUND
[0002] The circuit breaker can provide protection for the circuit electrically connected with the circuit breaker. In the case of abnormal conditions such as overloading and short circuit of the circuit, the operating mechanism of the circuit breaker acts to control the circuit breaker to be in a tripped state, thereby making the circuit be in a disconnected state to avoid further expansion of the circuit fault.
[0003] Based on the structure of the existing operating mechanism, the operating mechanism includes a mounting bracket, a traction rod and an adjusting screw. The angle between the traction rod and the mounting bracket can be adjusted by the adjusting screw, so as to drive other structures by the traction rod to switch the working state of the circuit breaker.
[0004] However, based on the structure of the existing operating mechanism, the maximum angle at which the traction rod can rotate relative to the mounting bracket depends on the adjustment of the adjusting screw by the operator, which has great instability and cannot guarantee the reliability of the operating mechanism. INVENTION CONTENTS
[0005] The present application provides an operating mechanism and a circuit breaker. The operating mechanism provided in the examples of the present application can limit the rotation angle of the traction rod relative to the mounting bracket, thereby guaranteeing the reliability of the circuit breaker switching between different states.
[0006] In a first aspect, the present application provides an operating mechanism, which includes a mounting bracket and a traction rod. The traction rod is provided with a mounting groove, and the mounting bracket is mounted in the mounting groove. The traction rod is rotatable relative to the mounting bracket. A first limiting protrusion is arranged between the mounting bracket and the traction rod. The first limiting protrusion is arranged on the rotation path of the traction rod relative to the mounting bracket, and the first limiting protrusion can limit the rotation angle of the traction rod relative to the mounting bracket.
[0007] In the examples of the present application, the traction rod is rotatable relative to the mounting bracket. During the closing process of the circuit breaker, the end of the traction rod close to the bottom wall of the housing assembly rotates in the direction close to the mounting bracket. In the case that the circuit breaker is in the closed state, the first limiting protrusion limits the rotation angle of the traction rod relative to the mounting bracket, thereby reducing the possibility that the rotation angle of the traction rod relative to the mounting bracket is too large, so that the circuit breaker cannot normally convert the working state. At the same time, the possibility that the circuit breaker cannot be in the closed state due to the small rotation angle of the traction rod relative to the mounting bracket during the closing process of the circuit breaker can be reduced.
[0008] Compared with the prior art, the angle of the traction rod relative to the mounting bracket is adjusted by manually adjusting the screw, which has great uncertainty. In the example of the present application, the size of the first limiting protrusion is fixed in the direction from the traction rod to the mounting bracket. Therefore, under the action of the first limiting protrusion, the angle of the traction rod relative to the mounting bracket is certain when the circuit breaker is in the closed state, which can ensure that the operating mechanism can work normally and realize the conversion of the circuit breaker between different working states.
[0009] In some possible implementation manners, the first limiting protrusion is arranged on the mounting bracket, and / or the first limiting protrusion is arranged on the traction rod.
[0010] In the example of the present application, whether the first limiting protrusion is arranged on the mounting bracket or the traction rod or both, the first limiting protrusion can limit the rotation angle of the traction rod relative to the mounting bracket, ensure that the operating mechanism can work normally, and realize the conversion of the circuit breaker between different working states.
[0011] In some possible implementation manners, the mounting bracket comprises a first matching surface and a second matching surface arranged at an angle, the first matching surface is provided with a mounting protrusion, the mounting protrusion extends into the mounting groove, and the contact surface of the mounting protrusion and the mounting groove is an arc surface.
[0012] In the example of the present application, since the mounting protrusion is arranged on the mounting bracket and the mounting groove is arranged on the traction rod, the connection of the mounting bracket and the traction rod can be realized through the cooperation of the mounting protrusion and the mounting groove. By arranging the contact surface of the mounting protrusion and the mounting groove as an arc surface, the friction generated during the rotation of the traction rod relative to the mounting bracket can be reduced, ensuring that the rotation of the traction rod relative to the mounting bracket can be smoothly executed, thereby ensuring the use reliability of the operating mechanism.
[0013] In addition, since the first matching surface and the second matching surface are arranged at an angle, the space between the first matching surface and the second matching surface can provide space for the rotation of the traction rod relative to the mounting bracket, reducing the possibility of interference between the traction rod and the mounting bracket.
[0014] In some possible implementation manners, when the first limiting protrusion is arranged on the mounting bracket, the first limiting protrusion is arranged on the first matching surface, and the first limiting protrusion is arranged at a distance from the mounting protrusion. Alternatively, the first limiting protrusion is arranged on the second matching surface.
[0015] In the example of the present application, whether the first limiting protrusion is arranged on the first matching surface or the second matching surface, the traction rod will abut against the first limiting protrusion during the closing process of the circuit breaker, so that the first limiting protrusion can limit the angle between the traction rod and the mounting bracket, reducing the possibility that the operating mechanism cannot work normally due to the large or small rotation of the traction rod relative to the mounting bracket.
[0016] In some possible implementation manners, the first limiting protrusion is arranged on one side of the traction rod facing the first fitting surface, or the first limiting protrusion is arranged on one side of the traction rod facing the second fitting surface.
[0017] In the examples of the present application, no matter whether the first limiting protrusion is arranged on one side of the traction rod facing the first fitting surface or one side of the traction rod facing the second fitting surface, during the closing process of the circuit breaker, the mounting bracket will abut against the first limiting protrusion, so that the first limiting protrusion can limit the angle between the traction rod and the mounting bracket, and reduce the possibility that the traction rod rotates too much or too little relative to the mounting bracket, so that the operating mechanism cannot work normally.
[0018] In some possible implementation manners, the operating mechanism further comprises a second limiting protrusion, the second limiting protrusion is arranged on one side of the traction rod facing the first fitting surface, and the second limiting protrusion and the first limiting protrusion are arranged on opposite sides of the mounting groove, respectively.
[0019] In the examples of the present application, by arranging the second limiting protrusion, the possibility that the traction rod rotates too much or too little relative to the mounting bracket during the process that the circuit breaker switches from the closed state to the tripped state can be reduced, and the use reliability of the circuit breaker can be ensured.
[0020] In some possible implementation manners, the operating mechanism further comprises a reset spring, one end of the reset spring is connected to the mounting bracket, the other end of the reset spring is connected to the traction rod, and the reset spring is used to drive the traction rod to reset after the traction rod rotates relative to the mounting bracket.
[0021] In the examples of the present application, by arranging the reset spring, the efficiency of the traction rod to return to the initial position can be improved, and the action efficiency of the operating mechanism can be improved.
[0022] In a second aspect, the present application provides a circuit breaker, which comprises a housing assembly, the operating mechanism of the first aspect and possible implementation manners of the first aspect, and the operating mechanism is installed on the housing assembly.
[0023] The circuit breaker provided in the above second aspect and possible designs of the second aspect has the beneficial effects brought by the first aspect and possible implementation manners of the first aspect, which will not be described here again.
[0024] In some possible implementation manners, the housing assembly comprises a first housing and a second housing matched with each other, the first housing is provided with a first limiting groove, the second housing is provided with a second limiting groove, the first limiting groove and the second limiting groove cooperate to form a limiting cavity, the traction rod is installed in the limiting cavity, and the traction rod is rotatable in the limiting cavity.
[0025] Compared with the prior art, the traction rod cooperates with the shell assembly through other structures. In the example of the present application, the first limiting groove is arranged on the first shell, and the second limiting groove is arranged on the second shell. The first limiting groove cooperates with the second limiting groove to form a limiting cavity. The traction rod directly cooperates with the shell assembly, which can reduce the cooperation size chain, reduce the cooperation error between the traction rod and the shell assembly, and reduce the amplitude of the traction rod relative to the shell assembly.
[0026] In some possible implementation manners, the first shell is provided with a first insulating plate, and the first limiting groove is arranged on the first insulating plate. The second shell is provided with a second insulating plate, and the second limiting groove is arranged on the second insulating plate. The first insulating plate cooperates with the second insulating plate. The traction rod comprises a clamping boss, which is clamped to one side of the first insulating plate away from the second insulating plate, or the clamping boss is clamped to one side of the second insulating plate away from the first insulating plate.
[0027] In the example of the present application, the first insulating plate is arranged on the first shell, and the second insulating plate is arranged on the second shell. The cooperation of the first insulating plate and the second insulating plate can ensure the phase-to-phase insulation of the circuit breaker and reduce the possibility of short circuit between different phases of the circuit breaker. The clamping boss is arranged on the traction rod, and the clamping boss can be clamped to one side of the first insulating plate away from the second insulating plate, or the clamping boss can be clamped to one side of the second insulating plate away from the first insulating plate. The clamping boss can cooperate with the first insulating plate and the second insulating plate to further improve the phase-to-phase insulation of the circuit breaker and further ensure the safety of the circuit breaker. BRIEF DESCRIPTION OF DRAWINGS
[0028] Figure 1 A cooperation schematic diagram of a shell assembly and an operating mechanism is provided in the example of the present application.
[0029] Figure 2 For Figure 1 A sectional view along A-A.
[0030] Figure 3 For Figure 2 A local enlarged schematic view of A in FIG.
[0031] Figure 4 A structure schematic diagram of an operating mechanism from a first perspective is provided in the example of the present application.
[0032] Figure 5 A structure schematic diagram of a traction rod is provided in the example of the present application.
[0033] Figure 6 A structure schematic diagram of an operating mechanism from a second perspective is provided in the example of the present application.
[0034] Figure 7 For Figure 6 A sectional view along B-B.
[0035] Figure 8 For Figure 7 A local enlarged view at B.
[0036] Reference signs:
[0037] 100, operating mechanism; 110, traction rod; 111, mounting groove; 112, first limiting protrusion; 113, second limiting protrusion; 114, clamping boss; 120, mounting bracket; 121, first matching surface; 122, second matching surface; 123, mounting protrusion; 130, reset spring; 200, shell assembly; 210, first shell; 211, first limiting groove; 220, second shell; 221, second limiting groove. DETAILED DESCRIPTION
[0038] In order to make the purpose, technical solutions and advantages of the examples of the present application clearer, the technical solutions in the examples of the present application will be described clearly and completely below in combination with the drawings in the examples of the present application. Obviously, the described examples are some examples of the present application, rather than all the examples. Based on the examples in the present application, all other examples obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terminology used in the specification of the present application is only for the purpose of describing specific examples and is not intended to limit the present application; the terms "comprise" and "have" and any variations thereof in the specification of the present application and the description of the drawings are intended to cover non-exclusive inclusion.
[0040] Reference herein to "example" means that a particular feature, structure, or characteristic described in connection with the example can be included in at least one example of the present application. The appearance of the phrase "example" in various places in the specification does not necessarily all refer to the same example, nor is it necessarily mutually exclusive of other examples. It is explicitly and implicitly understood that the examples described herein can be combined.
[0041] The term "and / or" herein is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of existence of A, existence of A and B, and existence of B. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.
[0042] The orientation words appearing in the following description are the directions shown in the drawings, and do not limit the specific structure of the operating mechanism of the present application.
[0043] In addition, the terms "first", "second", and the like in the description and claims of the present application or the above drawings are used to distinguish different objects, and are not used to describe a specific order, and can explicitly or implicitly include one or more of the features.
[0044] In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more (including two), and similarly, "a plurality of groups" means two or more groups (including two groups).
[0045] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, the "connection" or "connection" of the mechanical structure can mean a physical connection, for example, the physical connection can be a fixed connection, for example, a fixed connection through a spacer, for example, a fixed connection through a screw, bolt or other spacer; the physical connection can also be a detachable connection, for example, a mutual clamping or clamping connection; the physical connection can also be integrally connected, for example, welding, bonding or integrally formed connection for connection. 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.
[0046] The circuit breaker can provide protection for the circuit electrically connected with the circuit breaker. In the case of abnormal state such as overload, short circuit and the like of the circuit, the operating mechanism of the circuit breaker acts to control the circuit breaker to be in the tripping state, so that the circuit is in the open circuit state, avoiding further expansion of the circuit fault.
[0047] When the circuit breaker switches between the tripping state and the closing state, or switches between the opening state and the closing state, the traction rod will rotate relative to the mounting bracket under the action of the corresponding force, and then drive other mechanisms of the circuit breaker to switch between different working states of the circuit breaker. Therefore, if the angle between the traction rod and the mounting bracket is too large or too small, it will affect the normal operation of the operating mechanism, and then affect the use reliability of the circuit breaker.
[0048] Based on the structure of the existing operating mechanism, the operating mechanism includes a mounting bracket, a traction rod and an adjusting screw, and the angle between the traction rod and the mounting bracket can be adjusted by the adjusting screw, so that the traction rod drives other mechanisms to switch between different working states of the circuit breaker. The maximum angle at which the traction rod can rotate relative to the mounting bracket depends on the adjustment of the adjusting screw by the operator, which has great instability, and it is difficult to ensure that the angle between the traction rod and the mounting bracket remains at a predetermined angle, affecting the use reliability of the operating mechanism.
[0049] Based on the above, the present application provides an operating mechanism and a circuit breaker.
[0050] In order to make the person skilled in the art better understand the scheme of the present application, the operating mechanism and the circuit breaker provided by the examples of the present application will be clearly and completely described below in combination with the drawings.
[0051] Exemplarily, the present application provides a circuit breaker, Figure 1 A cooperation schematic view of a housing assembly and an operating mechanism provided by the examples of the present application is shown in Figure 2 A cooperation schematic view of a housing assembly and an operating mechanism provided by the examples of the present application is shown in Figure 1 A sectional view along A-A in Figure 3 A sectional view along A-A in Figure 2 A sectional view along A-A in Figure 4 A structure schematic view of the operating mechanism from a first perspective provided by the examples of the present application is shown in
[0052] Please refer to Figures 1-4 The circuit breaker comprises a housing assembly 200 and an operating mechanism 100, and the operating mechanism 100 is installed on the housing assembly 200.
[0053] The circuit breaker can further comprise a tripping mechanism and a contact mechanism. Exemplarily, in the case that the circuit is in a fault state such as overload, short circuit, undervoltage, etc., the bimetallic strip in the tripping mechanism can be heated to apply a force to the operating mechanism 100, so that the operating mechanism 100 acts, and in turn drives the contact mechanism to act, so that the circuit breaker is in a tripped state.
[0054] The circuit breaker can be a single-phase circuit breaker, and the circuit breaker can also be a multi-phase circuit breaker, which is not specifically limited by the examples of the present application.
[0055] In the process of switching the circuit breaker from the tripped state to the closed state, the operating mechanism 100 is driven by external force to act the contact mechanism and the tripping mechanism, so that the static contact and the moving contact of the circuit breaker are in contact, realizing the closing of the circuit breaker.
[0056] The specific description of the operating mechanism 100 can be referred to the relevant description below.
[0057] Based on the circuit breaker provided by the above examples, please refer to Figures 1-3 The housing assembly 200 comprises a first housing 210 and a second housing 220 which cooperate with each other, the first housing 210 is provided with a first limiting groove 211, the second housing 220 is provided with a second limiting groove 221, the first limiting groove 211 and the second limiting groove 221 cooperate to form a limiting cavity, the traction rod 110 is installed in the limiting cavity, and the traction rod 110 is rotatable in the limiting cavity.
[0058] The first housing 210 and the second housing 220 are made of insulating materials, such as polyvinyl chloride, polycarbonate (also known as PC plastic), etc.
[0059] The first shell 210 and the second shell 220 made of insulating material can reduce the possibility of current escaping from the shell assembly 200 to the outside of the shell, ensuring the safety of the use of the circuit breaker.
[0060] The first limiting groove 211 provided on the first shell 210 and the second limiting groove 221 provided on the second shell 220 can form a limiting cavity. The traction rod 110 is installed to the limiting cavity, and the traction rod 110 can rotate in the limiting cavity. The contact surface of the traction rod 110 and the limiting cavity is an arc surface, so as to reduce the friction generated during the rotation of the traction rod 110 relative to the limiting cavity.
[0061] The first shell 210 and the second shell 220 can directly contact the traction rod 110. The outer surface of the traction rod 110 can also be provided with a protruding structure, so that the first shell 210 and the second shell 220 respectively contact the protruding structure, realizing the cooperation between the first shell 210, the second shell 220 and the traction rod 110.
[0062] Compared with the prior art in which the traction rod 110 cooperates with the shell assembly 200 through other structures, in the example of the present application, the first limiting groove 211 is provided on the first shell 210, the second limiting groove 221 is provided on the second shell 220, the first limiting groove 211 cooperates with the second limiting groove 221 to form a limiting cavity, and the traction rod 110 directly cooperates with the shell assembly 200. This can reduce the cooperation size chain, reduce the cooperation error between the traction rod 110 and the shell assembly 200, and reduce the amplitude of the shaking of the traction rod 110 relative to the shell assembly 200.
[0063] Based on the circuit breaker provided in the above example, the first shell 210 is provided with a first insulating plate, and the first limiting groove 211 is provided on the first insulating plate. The second shell 220 is provided with a second insulating plate, the second limiting groove 221 is provided on the second insulating plate, and the first insulating plate cooperates with the second insulating plate. The traction rod 110 includes a clamping boss 114, which is clamped to the side of the first insulating plate away from the second insulating plate, or the clamping boss 114 is clamped to the side of the second insulating plate away from the first insulating plate.
[0064] In the case of a multi-phase circuit breaker, the first shell 210 is provided with a first insulating plate. The first insulating plate can be integrally formed with the first shell 210, or can be connected to the first shell 210 by insertion or the like. The first insulating plate can be provided with one, or can be provided with multiple in intervals.
[0065] The first insulating plate is provided between different phases of the circuit breaker, which can improve the insulation performance between different phases of the circuit breaker and reduce the possibility of short circuit between different phases.
[0066] The number of the second insulating plates is equal to the number of the first insulating plates, and the second insulating plates correspond to the first insulating plates one by one. The first insulating plates and the second insulating plates can be arranged alternately, or the first insulating plates and the second insulating plates can be in plane contact. The present application does not make specific limitations on this.
[0067] Figure 5 A schematic structural diagram of a drawbar provided in the present application is shown in Figure 5 The drawbar 110 comprises a clamping boss 114, and the cross section of the clamping boss 114 can be polygonal, circular or other shapes.
[0068] The drawbar 110 can be provided with one clamping boss 114, or the drawbar 110 can be provided with a plurality of clamping bosses 114.
[0069] Each phase of the circuit breaker can be provided with only one clamping boss 114. In this case, when the first insulating plates and the second insulating plates are arranged alternately, the clamping boss 114 can be arranged on the side of the first insulating plate away from the second insulating plate, or the clamping boss 114 can be arranged on the side of the second insulating plate away from the first insulating plate.
[0070] Each phase of the circuit breaker can also correspond to two clamping bosses (not shown in the figure). In this case, when the first insulating plates and the second insulating plates are arranged alternately, one clamping boss is arranged on the side of the first insulating plate away from the second insulating plate, and one clamping boss is arranged on the side of the second insulating plate away from the first insulating plate, that is, the first insulating plates and the second insulating plates are arranged between the two clamping bosses. The present application does not make specific limitations on the arrangement of the clamping boss 114.
[0071] In the present application, the first insulating plates are arranged in the first housing 210, and the second insulating plates are arranged in the second housing 220. The cooperation of the first insulating plates and the second insulating plates can ensure the phase-to-phase insulation of the circuit breaker and reduce the possibility of short circuit between different phases of the circuit breaker. The clamping boss 114 is arranged on the drawbar 110, and the clamping boss 114 can be clamped to the side of the first insulating plate away from the second insulating plate, or the clamping boss 114 can be clamped to the side of the second insulating plate away from the first insulating plate. The clamping boss 114 can cooperate with the first insulating plates and the second insulating plates to further improve the phase-to-phase insulation of the circuit breaker and further ensure the safety of the circuit breaker.
[0072] Next, the structure of the operating mechanism 100 will be described.
[0073] Exemplarily, the present application provides an operating mechanism, Figure 6 A schematic structural diagram of the operating mechanism from a second perspective provided in the present application is shown in Figure 7 A schematic structural diagram of the operating mechanism from a second perspective provided in the present application is shown in Figure 6 A sectional view along B-B in the schematic structural diagram of the operating mechanism from a second perspective provided in the present application is shown in Figure 8 A schematic structural diagram of the operating mechanism from a second perspective provided in the present application is shown inFigure 7 A local enlarged view at B.
[0074] Please refer to Figures 4-8 The operating mechanism 100 comprises a mounting bracket 120 and a traction rod 110. The traction rod 110 is provided with a mounting groove 111, and the mounting bracket 120 is mounted in the mounting groove 111. The traction rod 110 is rotatable relative to the mounting bracket 120. A first limiting protrusion 112 is arranged between the mounting bracket 120 and the traction rod 110. The first limiting protrusion 112 is arranged on a rotation path of the traction rod 110 relative to the mounting bracket 120. The first limiting protrusion 112 can limit the rotation angle of the traction rod 110 relative to the mounting bracket 120.
[0075] When the circuit breaker needs to be switched from the tripped state to the closed state, or from the open state to the closed state, the operating handle in the operating mechanism 100 will directly or indirectly apply a force to the traction rod 110. In the case where the operating mechanism 100 is placed as shown in Figure 4 The end of the traction rod 110 close to the bottom wall of the shell assembly 200 rotates in a direction close to the mounting bracket 120.
[0076] The mounting bracket 120 can comprise side plates arranged at intervals. The side of the side plate facing the traction rod 110 can be provided with a mounting structure capable of extending into the mounting groove 111 to realize the connection between the mounting bracket 120 and the traction rod 110.
[0077] The contact surface of the mounting groove 111 and the mounting structure can be an arc surface. This can make the friction generated during the relative rotation of the mounting structure relative to the groove wall of the mounting groove 111 smaller, facilitating the rotation of the mounting structure relative to the mounting groove 111, and further realizing the rotation of the traction rod 110 relative to the mounting bracket 120.
[0078] The slot of the mounting groove 111 can be arranged towards the mounting bracket 120.
[0079] The first limiting protrusion 112 is arranged between the mounting bracket 120 and the traction rod 110. The first limiting protrusion can be arranged on the mounting bracket 120, or on the traction rod 110. Part of the first limiting protrusion can be arranged on the mounting bracket 120, and the other part of the first limiting protrusion can be arranged on the traction rod 110. As long as the first limiting protrusion 112 is arranged between the traction rod 110 and the mounting bracket 120, and the first limiting protrusion 112 can limit the maximum angle of rotation of the mounting bracket 120 relative to the traction rod 110, it is acceptable.
[0080] Under the action of the first limiting protrusion 112, the angle between the traction rod 110 and the mounting bracket 120 can be kept at a preset angle, which can be 85°, 84° or other angles. The operator can adjust the preset angle between the traction rod 110 and the mounting bracket 120 according to the user's demand, and adjust the size of the first limiting protrusion 112.
[0081] In the examples of the present application, the traction rod 110 is rotatable relative to the mounting bracket 120. During the closing process of the circuit breaker, the end of the traction rod 110 close to the bottom wall of the housing assembly 200 rotates in the direction close to the mounting bracket 120. In the case where the circuit breaker is in the closed state, the first limiting protrusion 112 limits the rotation angle of the traction rod 110 relative to the mounting bracket 120, reducing the possibility that the circuit breaker cannot normally perform state conversion due to the traction rod 110 rotating too much relative to the mounting bracket 120. At the same time, it can reduce the possibility that the circuit breaker cannot be in the closed state due to the traction rod 110 rotating too little relative to the mounting bracket 120 during the closing process of the circuit breaker.
[0082] Compared with the prior art, the angle of the traction rod relative to the mounting bracket is adjusted by manually adjusting the screw, which has great uncertainty. In the examples of the present application, the size of the first limiting protrusion 112 is fixed in the direction from the traction rod 110 to the mounting bracket 120. Therefore, under the action of the first limiting protrusion 112, the angle of the traction rod 110 relative to the mounting bracket 120 is certain in the case where the circuit breaker is in the closed state, which can ensure that the operating mechanism 100 can work normally and realize the conversion of the circuit breaker between different working states.
[0083] Based on the operating mechanism 100 provided in the above examples, please refer to Figure 8 The first limiting protrusion is provided on the mounting bracket 120, and / or the first limiting protrusion 112 is provided on the traction rod 110.
[0084] In the case where the first limiting protrusion is provided on the mounting bracket 120 (not shown in the figure), the first limiting protrusion can be integrally formed with the mounting bracket 120, and the first limiting protrusion can also be connected with the mounting bracket 120 through hole shaft cooperation and the like.
[0085] In the case where the first limiting protrusion 112 is provided on the traction rod 110, the first limiting protrusion 112 can be integrally formed with the traction rod 110, and the first limiting protrusion 112 can also be connected with the traction rod 110 through hole shaft cooperation and the like.
[0086] In the case where part of the first limiting protrusion is provided on the mounting bracket 120 and part of the first limiting protrusion is provided on the traction rod 110 (not shown in the figure), the first limiting protrusion can include a first sub-limiting protrusion and a second sub-limiting protrusion.
[0087] The first sub-limiting protrusion can be arranged on the mounting bracket 120, and the second sub-limiting protrusion can be arranged on the traction rod 110. The contact surface of the first sub-limiting protrusion and the second sub-limiting protrusion can be an arc surface. The surface of the first sub-limiting protrusion facing the second sub-limiting protrusion can be a plane or an arc surface. The surface of the second sub-limiting protrusion facing the first sub-limiting protrusion can be a plane or an arc surface, as long as the first sub-limiting protrusion can rotate relative to the second sub-limiting protrusion.
[0088] In the examples of the present application, whether the first limiting protrusion is arranged on the mounting bracket 120, or the first limiting protrusion 112 is arranged on the traction rod 110, or the first limiting protrusion is arranged on both the mounting bracket 120 and the traction rod 110, the first limiting protrusion 112 can limit the rotation angle of the traction rod 110 relative to the mounting bracket 120, so as to ensure that the operating mechanism 100 can work normally and realize the conversion of the circuit breaker between different working states.
[0089] Based on the operating mechanism 100 provided in the above examples, please continue to refer to Figure 8 The mounting bracket 120 includes a first matching surface 121 and a second matching surface 122 arranged at an angle. The first matching surface 121 is provided with a mounting protrusion 123, the mounting protrusion 123 extends into the mounting groove 111, and the contact surface of the mounting protrusion 123 and the mounting groove 111 is an arc surface.
[0090] The angle formed by the first matching surface 121 and the second matching surface 122 can be an obtuse angle. The first matching surface 121 and the second matching surface 122 can cooperate to form a yielding slot, which provides space for the rotation of the traction rod 110 relative to the mounting bracket 120.
[0091] The first matching surface 121 can be substantially perpendicular to the bottom wall of the housing assembly 200. It can be understood that the included angle between the first matching surface 121 and the bottom wall of the housing assembly 200 is greater than or less than 85° and less than or equal to 95°.
[0092] The slot opening of the mounting groove 111 can be arranged towards the first matching surface 121.
[0093] The mounting protrusion 123 is arranged on the first matching surface 121, and the mounting protrusion 123 can be a column, a boss, a hemispherical body or other protruding structures. The mounting protrusion 123 can extend into the mounting groove 111, and the mounting protrusion 123 can rotate in the mounting groove 111.
[0094] In the example of the present application, since the mounting protrusion 123 is arranged on the mounting bracket and the mounting groove 111 is arranged on the traction rod 110, the connection between the mounting bracket 120 and the traction rod 110 can be achieved by the cooperation of the mounting protrusion 123 and the mounting groove 111. By arranging the contact surface of the mounting protrusion 123 and the mounting groove 111 as an arc surface, the friction generated during the rotation of the traction rod 110 relative to the mounting bracket 120 can be reduced, ensuring that the rotation of the traction rod 110 relative to the mounting bracket 120 can be smoothly performed, thereby ensuring the use reliability of the operating mechanism 100.
[0095] In addition, since the first cooperation surface 121 and the second cooperation surface 122 are arranged at an angle, the space between the first cooperation surface 121 and the second cooperation surface 122 can provide space for the rotation of the traction rod 110 relative to the mounting bracket 120, reducing the possibility of interference between the traction rod 110 and the mounting bracket 120.
[0096] Based on the operating mechanism 100 provided in the above example, in the case where the first limiting protrusion is arranged on the mounting bracket 120 (not shown in the figure), the first limiting protrusion is arranged on the first cooperation surface 121, and the first limiting protrusion is arranged at an interval from the mounting protrusion 123. Alternatively, the first limiting protrusion is arranged on the second cooperation surface 122.
[0097] The first limiting protrusion can be arranged on the first cooperation surface 121. The first limiting protrusion and the mounting protrusion 123 can be substantially parallel, or the first limiting protrusion and the mounting protrusion 123 can be arranged at an angle, which is not specifically limited in the example of the present application.
[0098] The first limiting protrusion and the mounting protrusion 123 are substantially parallel, which can be understood as the included angle between the first limiting protrusion and the mounting protrusion 123 being less than or equal to 5°.
[0099] In the case where the first limiting protrusion is arranged on the second cooperation surface 122, the first limiting protrusion is also arranged at an interval from the mounting protrusion 123.
[0100] In the example of the present application, whether the first limiting protrusion is arranged on the first cooperation surface 121 or the second cooperation surface 122, during the closing process of the circuit breaker, the traction rod 110 will abut against the first limiting protrusion, so that the first limiting protrusion can limit the angle between the traction rod 110 and the mounting bracket 120, reducing the possibility that the operating mechanism 100 cannot work normally due to the large or small rotation of the traction rod 110 relative to the mounting bracket 120.
[0101] Based on the operating mechanism 100 provided in the above example, please refer to Figure 8In the case where the first limiting protrusion 112 is arranged on the side of the traction rod 110 facing the first mating surface 121, the first limiting protrusion 112 can be arranged apart from the mounting groove 111, or the first limiting protrusion 112 can be a protrusion structure formed along the side wall of the mounting groove 111 away from the bottom of the mounting groove 111.
[0102] In the case where the first limiting protrusion 112 is arranged on the side of the traction rod 110 facing the first mating surface 121, the first limiting protrusion 112 can be arranged apart from the mounting groove 111, or the first limiting protrusion 112 can be a protrusion structure formed along the side wall of the mounting groove 111 away from the bottom of the mounting groove 111.
[0103] In the case where the first limiting protrusion 112 is arranged on the side of the traction rod 110 facing the second mating surface 122, the first limiting protrusion 112 can be a protrusion structure arranged on the traction rod 110, or the first limiting protrusion 112 can be a protrusion formed after a groove is arranged on the traction rod 110, which is not specifically limited in the examples of the present application.
[0104] In the examples of the present application, whether the first limiting protrusion 112 is arranged on the side of the traction rod 110 facing the first mating surface 121 or the second mating surface 122, during the closing process of the circuit breaker, the mounting bracket 120 will abut against the first limiting protrusion 112, so that the first limiting protrusion 112 can limit the angle between the traction rod 110 and the mounting bracket 120, and reduce the possibility that the operating mechanism 100 cannot work normally due to the large or small rotation of the traction rod 110 relative to the mounting bracket 120.
[0105] Based on the operating mechanism 100 provided in the above examples, please refer to Figure 8 The operating mechanism 100 further comprises a second limiting protrusion 113 arranged on the side of the traction rod 110 facing the first mating surface 121, and the second limiting protrusion 113 and the first limiting protrusion 112 are arranged on opposite sides of the mounting groove 111.
[0106] The mounting groove 111 can divide the traction rod 110 into a part close to the bottom wall of the shell assembly 200 and a part away from the bottom wall of the shell assembly 200. The second limiting protrusion 113 and the first limiting protrusion 112 are arranged on opposite sides of the mounting groove 111, which can be understood as that the first limiting protrusion 112 can be arranged on the part of the traction rod 110 close to the bottom wall of the shell assembly 200, and the second limiting protrusion 113 can be arranged on the part of the traction rod 110 away from the bottom wall of the shell assembly 200.
[0107] During the use of the circuit breaker, in the event of an overload or other abnormal condition, the bimetallic strip in the tripping mechanism can be heated and deformed, bending towards the traction rod 110, thus applying a force towards the mounting bracket 120 to the traction rod 110. This force is applied to the operating mechanism 100 as follows: Figure 4 With the position shown, the traction rod 110 rotates counterclockwise. The end of the traction rod 110 away from the bottom wall of the housing assembly 200 rotates towards the mounting bracket 120. During the rotation of the traction rod 110, the second limiting protrusion 113 abuts against the mounting bracket 120, limiting the angle of the traction rod 110 relative to the mounting bracket 120, reducing the possibility of the traction rod 110 rotating too large or too small an angle, and ensuring the reliability of the circuit breaker.
[0108] In this application example, by setting the second limit protrusion 113, the possibility of the traction rod 110 rotating too much or too little relative to the mounting bracket 120 during the process of switching the circuit breaker from the closed state to the tripped state can be reduced, thus ensuring the reliability of the circuit breaker.
[0109] Based on the operating mechanism 100 provided in the above example, please refer to... Figure 4 The operating mechanism 100 also includes a return spring 130. One end of the return spring 130 is connected to the mounting bracket 120, and the other end of the return spring 130 is connected to the traction rod 110. The return spring 130 is used to drive the traction rod 110 to return to its original position after the traction rod 110 rotates relative to the mounting bracket 120.
[0110] If the operating mechanism is 100 Figure 4 During the process of the circuit breaker returning from the tripped or open state to the closed state, the reset spring 130 can apply a force to the traction rod 110, causing the traction rod 110 to rotate clockwise, thereby accelerating the speed at which the traction rod 110 returns to its initial position and improving the efficiency of the circuit breaker returning from the open or tripped state to the closed state.
[0111] In this application example, by setting a reset spring 130, the efficiency of the traction rod 110 returning to its initial position can be accelerated, thereby improving the operating efficiency of the operating mechanism 100.
[0112] Finally, it should be noted that the above embodiments are merely specific implementations of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. An operating mechanism, characterized in that, include: Install bracket, The traction rod has a mounting groove, the mounting bracket is mounted in the mounting groove, and the traction rod is rotatable relative to the mounting bracket; A first limiting protrusion is provided between the mounting bracket and the traction rod. The first limiting protrusion is located on the rotation path of the traction rod relative to the mounting bracket, and the first limiting protrusion can limit the rotation angle of the traction rod relative to the mounting bracket.
2. The operating mechanism according to claim 1, characterized in that, The first limiting protrusion is provided on the mounting bracket, and / or the first limiting protrusion is provided on the traction rod.
3. The operating mechanism according to claim 2, characterized in that, The mounting bracket includes a first mating surface and a second mating surface that are set at an angle. The first mating surface is provided with a mounting protrusion that extends into the mounting groove. The contact surface between the mounting protrusion and the mounting groove is an arc surface.
4. The operating mechanism according to claim 3, characterized in that, When the first limiting protrusion is provided on the mounting bracket, the first limiting protrusion is provided on the first mating surface, and the first limiting protrusion is spaced apart from the mounting protrusion; or, the first limiting protrusion is provided on the second mating surface.
5. The operating mechanism according to claim 3, characterized in that, When the first limiting protrusion is provided on the traction rod, the first limiting protrusion is provided on the side of the traction rod facing the first mating surface, or... The first limiting protrusion is located on the side of the traction rod facing the second mating surface.
6. The operating mechanism according to claim 5, characterized in that, It also includes a second limiting protrusion, which is located on the side of the traction rod facing the first mating surface. The second limiting protrusion and the first limiting protrusion are respectively located on opposite sides of the mounting groove.
7. The operating mechanism according to any one of claims 1 to 6, characterized in that, The device includes a return spring, one end of which is connected to the mounting bracket and the other end of which is connected to the traction rod. The return spring is used to reset the traction rod after it has rotated relative to the mounting bracket.
8. A circuit breaker, characterized in that, It includes a housing assembly and an operating mechanism as described in any one of claims 1 to 7, wherein the operating mechanism is mounted on the housing assembly.
9. The circuit breaker according to claim 8, characterized in that, The housing assembly includes a first housing and a second housing that cooperate with each other. The first housing is provided with a first limiting groove, and the second housing is provided with a second limiting groove. The first limiting groove and the second limiting groove cooperate to form a limiting cavity. The traction rod is installed into the limiting cavity and can rotate within the limiting cavity.
10. The circuit breaker according to claim 9, characterized in that, The first housing is provided with a first insulating plate, and the first limiting groove is provided on the first insulating plate; The second housing is provided with a second insulating plate, and the second limiting groove is provided on the second insulating plate. The first insulating plate cooperates with the second insulating plate. The traction rod includes a snap-fit boss, which snaps onto the side of the first insulating plate opposite to the second insulating plate, or the snap-fit boss snaps onto the side of the second insulating plate opposite to the first insulating plate.