Handle assembly and circuit breaker

Abstract

The utility model discloses a handle assembly and a circuit breaker, and relates to the technical field of circuit breakers, and the handle assembly comprises a handle and a lock plate. The handle comprises a driving lever, a rotating part and a linkage part which are integrally formed, and the driving lever and the linkage part are arranged on the peripheral side of the rotating part at intervals. The rotating part is rotatably connected between a pair of clamping plates of the circuit breaker, and the linkage part is connected with a connecting rod shaft of the circuit breaker. The driving lever is provided with an assembling groove, the lock plate is installed in the assembling groove through a limiting structure, and part of the lock plate can extend out of the assembling groove to be connected with a locking part of the circuit breaker. According to the handle assembly and the circuit breaker, the number of parts can be reduced, the structure is simplified, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit breakers, in particular to a handle assembly and a circuit breaker. BACKGROUND

[0002] A motor circuit breaker is a kind of circuit breaker specially used for protecting a motor, which can provide overload, short circuit, open phase and other fault protection for the motor. The mainstream motor circuit breaker mainly adopts a button type or a knob type operation form to perform opening and closing operations.

[0003] The button and the knob in the prior art both need to cooperate with a balance wheel in the motor circuit breaker to drive other components to complete the opening and closing operations, and a separate locking structure needs to be provided to avoid opening or closing due to misoperation.

[0004] However, both the above two operation forms have the problems of a large number of parts, complex structure and high production cost. Therefore, it is urgent to provide a handle assembly for a motor circuit breaker to solve the above problems. Invention content

[0005] The present application aims to provide a handle assembly and a circuit breaker, which can reduce the number of parts, simplify the structure and reduce the production cost.

[0006] In a first aspect, the present application provides a handle assembly applied to a circuit breaker, which comprises an integrally formed dial lever, a rotating part and a linkage part, the dial lever and the linkage part being arranged at the circumferential side of the rotating part. The rotating part is rotatably connected between a pair of clamping plates of the circuit breaker, and the linkage part is connected with a connecting rod shaft of the circuit breaker. A lock plate is provided on the dial lever, and the lock plate is installed in the assembly groove through a limiting structure, and part of the lock plate can extend out of the assembly groove and be connected with a locking part of the circuit breaker.

[0007] The integrally formed dial lever, rotating part and linkage part can drive the connecting rod shaft to act in the process of rotating the rotating part by dialing the dial lever, so as to realize the opening and closing operations of the circuit breaker. The one-piece design avoids the problems of a large number of parts and difficult assembly caused by the assembly of multiple parts in the traditional scheme, and the lock plate installed on the dial lever is also conducive to simplifying the structure of the handle assembly and improving the assembly efficiency of the handle assembly on the basis of providing locking function, thereby reducing the production cost.

[0008] In some examples, the lock plate comprises an integrally formed mounting part and a main body part, the mounting part is slidingly installed in the assembly groove, and the limiting structure comprises a first boss provided on the mounting part and a second boss provided in the assembly groove, and the first boss can be connected to the side of the second boss away from the slot opening of the assembly groove.

[0009] The integrally formed lock plate is slidably installed in the assembly groove, which is simple in structure, easy to assemble, and convenient to smoothly control the position of the lock plate to engage the locking portion of the circuit breaker when the handle assembly needs to be locked.

[0010] In some examples, the limiting structure further includes a limiting slot arranged on the mounting portion and a limiting rod arranged in the assembly groove, the limiting slot being adapted to the limiting rod.

[0011] The limiting cooperation of the limiting slot and the limiting rod can further improve the assembly stability of the lock plate in the assembly groove and prevent the lock plate from automatically sliding out of the assembly groove due to shaking.

[0012] In some examples, the lock plate further includes a resilient portion, the resilient portion and the first protrusion being located on opposite sides of the lock plate, the resilient portion being provided with a protruding rib, and the protruding rib being elastically abutted against the groove wall of the assembly groove.

[0013] Firstly, the elastic force generated by the resilient portion makes the protruding rib always closely adhere to the groove wall, effectively eliminating the shaking gap of the lock plate in the assembly groove and ensuring the smoothness of the sliding process. Secondly, the friction force generated by the elastic contact can serve as a positioning function, allowing the lock plate to remain in the current position without external force, preventing accidental displacement due to vibration and the like.

[0014] In some examples, the main body portion is provided with a pull rod, the pull rod being located on a side of the main body portion away from the mounting portion, and the pull rod being used to operate and control the sliding position of the lock plate in the assembly groove.

[0015] The provision of the pull rod on the lock plate allows the operator to conveniently control the sliding position of the lock plate in the assembly groove by pulling the pull rod, which is simple in structure, easy to manufacture and assemble.

[0016] In some examples, the main body portion is further provided with a padlock hole, when the main body portion slides out of the assembly groove, the main body portion abuts against the locking portion, and the padlock hole can be hung with a padlock to limit the return of the lock plate.

[0017] The design of the padlock hole realizes the safe locking function of the handle assembly, which can further improve the safety of the opening and closing operation of the circuit breaker in cooperation with the locking portion, avoiding the personnel from mistakenly operating to push the lock plate back into the assembly groove and close the circuit, thereby protecting the safety of the circuit maintenance personnel.

[0018] In some examples, the assembly groove further includes oppositely arranged first and second limiting edges, and the first protrusion is slidably limited between the first and second limiting edges.

[0019] By setting the first limiting edge and the second limiting edge in the assembly groove, a precise guide channel can be formed in the assembly groove, and the first boss on the lock plate mounting portion is limited in the guide channel, so that the lock plate can always remain stable during sliding in the assembly groove, effectively preventing the lock plate from being skewed or stuck during movement.

[0020] In some examples, the rotating portion includes a rotating shaft hole and a mounting groove arranged on the side of the rotating shaft hole, the rotating shaft hole is connected to the clamping plate through a rotating shaft, a torsional spring is arranged in the mounting groove, the torsional spring has a first force arm fixed to the rotating portion and a second force arm fixed to the clamping plate, so as to realize the automatic reset function of the handle.

[0021] Only the rotating shaft hole is arranged on the rotating portion, and only the rotating shaft needs to be inserted during assembly to realize the rotating connection, so the structure is simple, which is convenient for processing and assembly. The mounting groove for mounting the torsional spring is arranged on the side of the rotating shaft hole, so that the torsional spring can be sleeved on the rotating shaft, and the function of automatically resetting the handle assembly is realized by using the torsional spring, which is convenient for switching the handle assembly from the closed position to the open position, and the structure is simple and has high reliability.

[0022] In some examples, the linkage portion includes an extension rod extending from the rotating portion and a through hole arranged at the end of the extension rod, and the through hole is connected with the connecting rod shaft.

[0023] The linkage portion adopts the extension rod extending from the rotating portion, which is convenient for matching the position of the connecting rod shaft, ensures that the path of the linkage portion rotating with the rotating portion is the same as the movement path of the connecting rod shaft in the arc-shaped sliding groove and the movable hole, so as to realize the accurate cooperation between the handle assembly and the connecting rod shaft.

[0024] In the second aspect, the embodiments of the present application also provide a circuit breaker, which includes oppositely arranged first and second clamping plates, an movably connected connecting rod shaft, a locking portion, and the above-mentioned handle assembly, the handle assembly is rotatably connected to the first and second clamping plates, and the linkage portion is connected with the connecting rod shaft, and the lock plate is selectively engaged with the locking portion to limit the movement of the handle.

[0025] The handle assembly provided by the embodiments can meet the normal opening and closing functions of the circuit breaker and the handle assembly locking function, while reducing the use of parts and simplifying the structure design, which is conducive to improving the assembly efficiency of the handle assembly, thereby improving the overall assembly efficiency of the circuit breaker and reducing the production cost. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0027] Figure 1 A structural diagram of an existing button type operating mechanism provided for an embodiment of the present application;

[0028] Figure 2 A structural diagram of a circuit breaker in an open state provided for an embodiment of the present application;

[0029] Figure 3 A structural diagram of a circuit breaker in a closed state provided for an embodiment of the present application;

[0030] Figure 4 A structural diagram of a handle assembly in an open state provided for an embodiment of the present application;

[0031] Figure 5 A structural diagram of a handle assembly in a closed state provided for an embodiment of the present application;

[0032] Figure 6 A structural diagram of a lock plate provided for an embodiment of the present application;

[0033] Figure 7 A structural diagram of a handle provided for an embodiment of the present application;

[0034] Figure 8 A structural diagram of a handle assembly provided for an embodiment of the present application;

[0035] Figure 9 A structural diagram of a handle assembly provided for an embodiment of the present application; Figure 5 An enlarged view of A in FIG. 8.

[0036] Explanation of reference numerals: 1, button; 2, balance wheel; 3, connecting rod shaft; 4, first clamping plate; 41, arc-shaped sliding groove; 42, positioning protrusion; 5, second clamping plate; 51, movable hole; 6, housing; 61, locking portion; 7, rotating shaft; 100, handle assembly; 101, lever; 1011, assembly groove; 1012, second boss; 1013, limiting rod; 1014, via hole; 1015, first limiting edge; 1016, second limiting edge; 102, rotating portion; 1021, rotating shaft hole; 1022, mounting groove; 1023, positioning groove; 103, linkage portion; 1031, extension rod; 1032, through hole; 104, lock plate; 1041, mounting portion; 1042, main body portion; 1043, first boss; 1044, limiting groove; 1045, elastic portion; 1046, protruding rib; 1047, pull rod; 1048, padlock hole; 105, torsional spring; 1051, first force arm; 1052, second force arm. DETAILED DESCRIPTION

[0037] To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will be clear, complete description of the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.

[0039] It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0040] In the description of the present application, it should be noted that the positions or location relationships indicated by the terms "in", "out" and the like are based on the positions or location relationships shown in the drawings, or the positions or location relationships commonly placed when the products of the present application are used, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present application, it should also be noted that unless otherwise explicitly specified and limited, the terms "set", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be connected inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] At present, the motor circuit breaker mainly operates the opening and closing function through the button type or knob type operating mechanism. Referring to Figure 1 The structure diagram of the button type operating mechanism in the prior art is provided. In the button type circuit breaker, the opening button and the closing button act on the two sides of the balance wheel 2 respectively, the balance wheel 2 is driven to rotate by pressing the button 1, the balance wheel drives the connecting rod shaft 3, thereby controlling the opening and closing state of the circuit breaker. The knob type circuit breaker relies on the rotating handle to drive the balance wheel 2, and needs to additionally set a fixed structure to maintain the stability of the handle. Both of the above two methods need to drive the balance wheel through the operating device, and there are problems of complex structure and large number of parts.

[0043] Meanwhile, the existing part button type or knob type operating mechanism has a locking mechanism, which can manually lock the button or knob after the opening to prevent the closing from being accidentally pressed during the circuit maintenance. The button or knob type operating mechanism with the locking mechanism further increases the number of parts, is complex in structure and inconvenient to assemble, resulting in high production cost.

[0044] Based on this, the embodiment of the present application provides a handle assembly and a circuit breaker, which can reduce the number of parts, simplify the structure and reduce the production cost.

[0045] In order for those skilled in the art to better understand the scheme of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings.

[0046] With reference to Figure 2 and Figure 3 , the present application provides a circuit breaker, which comprises oppositely arranged first and second clamping plates 4 and 5, an articulable connecting rod shaft 3, a locking portion 61 and the above-mentioned handle assembly 100. The handle assembly 100 is rotationally connected to the first and second clamping plates 4 and 5, and the linkage portion 103 is connected to the connecting rod shaft 3. The locking plate 104 is selectively engaged with the locking portion 61 to limit the handle movement.

[0047] The first and second clamping plates 4 and 5 are oppositely arranged, and have an accommodating space therebetween. The first clamping plate 4 is provided with an arc-shaped sliding groove 41, and the second clamping plate 5 is provided with a movable hole 51. The connecting rod shaft 3 is located in the accommodating space, and the first end of the connecting rod shaft 3 is located in the arc-shaped sliding groove 41, and the second end of the connecting rod shaft 3 is located in the movable hole 51. The connecting rod shaft 3 can be synchronously moved in the arc-shaped sliding groove 41 and the movable hole 51 when being driven by a driving force.

[0048] Part of the handle assembly 100 is located in the accommodating space, and is rotationally connected to the first and second clamping plates 4 and 5, so that the handle assembly 100 can be rotated between the first and second clamping plates 4 and 5. The linkage portion 103 of the handle assembly 100 is also located in the accommodating space, and is connected to the connecting rod shaft 3, so that the handle assembly 100 can drive the connecting rod shaft 3 to move in the arc-shaped sliding groove 41 and the movable hole 51 during rotation, to drive other components to complete the opening and closing operation.

[0049] The circuit breaker further comprises a housing 6, the first clamping plate 4 and the second clamping plate 5 are arranged inside the housing 6, and the locking portion 61 is arranged on the outer surface of the housing 6. The handle assembly 100 is arranged outside the housing 6, and the part of the handle assembly 100 outside the housing 6 is provided with a locking plate 104, which can adjust the position thereof according to the use of the circuit breaker to engage the locking portion 61 arranged outside the housing 6, lock the rotation of the handle assembly 100, and thus realize the locking of the switching function of the circuit breaker.

[0050] The integrated handle assembly 100 provided in the embodiment replaces the split design of the button 1 and the balance wheel 2 in the conventional scheme, can meet the normal switching function of the circuit breaker and the locking function of the handle assembly 100, reduces the use of parts, simplifies the structure design, is beneficial to improving the assembly efficiency of the handle assembly 100, and thus improves the overall assembly efficiency of the circuit breaker and reduces the production cost.

[0051] The specific structure of the handle assembly 100 provided in the application will be described in detail below with reference to the drawings.

[0052] Please refer to Figures 2 to 5 The embodiment provides a handle assembly 100 applied to a circuit breaker, comprising a handle, the handle comprising an integrally formed lever 101, a rotating portion 102 and a linkage portion 103, the lever 101 and the linkage portion 103 being arranged on the circumferential side of the rotating portion 102. The rotating portion 102 is rotatably connected between a pair of clamping plates of the circuit breaker, and the linkage portion 103 is connected with a connecting rod shaft 3 of the circuit breaker. The lever 101 is provided with an assembly groove 1011, a locking plate 104 is arranged in the assembly groove 1011 through a limiting structure, and part of the locking plate 104 can extend out of the assembly groove 1011 and be connected with a locking portion 61 of the circuit breaker.

[0053] The integrally formed handle can drive the connecting rod shaft 3 to move through the linkage portion 103 during the rotation of the rotating portion 102 driven by the lever 101, so as to realize the switching operation of the circuit breaker. The integrated design avoids the problem of too many parts and difficult assembly in the conventional scheme, and the locking plate 104 arranged on the lever 101 is also beneficial to simplifying the structure of the handle assembly 100 and improving the assembly efficiency of the handle assembly 100 on the basis of providing the locking function, so as to reduce the production cost.

[0054] Among them, refer to Figure 2 and Figure 3The lever 101 is used as a user operating component, extends to the outside of the circuit breaker housing 6, and is manually operated to achieve the tripping or closing action of the circuit breaker. The rotating part 102 is located between the lever 101 and the linkage part 103, and is rotatably installed between the first clamping plate 4 and the second clamping plate 5 of the circuit breaker, forming a rotating fulcrum. The linkage part 103 is located inside the housing 6 and is connected with the connecting rod shaft 3 of the circuit breaker, and is used to transmit the rotating motion of the handle assembly 100 to the internal mechanism (such as the tripping device or the contact system) of the circuit breaker. This integrated design avoids the cumulative error caused by the assembly of multiple parts in the traditional scheme, and improves the operation accuracy and mechanical reliability.

[0055] During operation, only the lever 101 needs to be operated to the tripping position or the closing position, and the lever 101, the rotating part 102 and the linkage part 103 are synchronously rotated, the linkage part 103 drives the connecting rod shaft 3 to move to the corresponding tripping or closing position, and then the other internal mechanisms are linked to realize the switching of tripping and closing. This is conducive to timely and accurate control of the tripping and closing state of the circuit breaker, reduces the possibility of operation jamming or operation failure caused by unstable cooperation between multiple parts, and improves the stability of tripping and closing operation.

[0056] The locking plate 104 installed on the lever 101 can extend into the assembly groove 1011 when the lever 101 is rotated to the tripping position, and can be inserted into the assembly groove 1011 when closing is to be performed. Referring to Figure 2 The extended locking plate 104 can be matched and abutted on the locking part 61 to lock the lever 101, so as to block the movement of the lever 101 to the closing position, and prevent the occurrence of accidental closing. The limiting structure between the locking plate 104 and the lever 101 is mainly used to prevent the locking plate 104 from sliding too much and separating from the lever 101, and can adopt the form of mutual clamping after sliding to a certain position, or increasing friction after sliding to a certain position (which is usually the position close to the slot of the assembly groove).

[0057] Referring to Figure 6 and Figure 7 In some examples, the locking plate 104 includes an integral mounting part 1041 and a main body part 1042, the mounting part 1041 is slidingly installed in the assembly groove 1011, the limiting structure includes a first boss 1043 provided on the mounting part 1041 and a second boss 1012 provided in the assembly groove 1011, and the first boss 1043 can be clamped on the side of the second boss 1012 away from the slot of the assembly groove 1011.

[0058] The integrally formed lock plate 104 is slidingly installed in the assembly slot 1011, which is simple in structure, easy to assemble, and facilitates smooth control of the position of the lock plate 104 when the handle assembly 100 needs to be locked, so as to engage the locking portion 61 of the circuit breaker. The lock plate 104 is limited by the cooperation of the first boss 1043 on the mounting portion 1041 and the second boss 1012 in the assembly slot 1011, so as to prevent the lock plate 104 from sliding out as a whole and separating from the assembly slot 1011, and to ensure the assembly stability of the lock plate 104.

[0059] The mounting portion 1041 is used to realize the sliding installation of the lock plate 104 in the assembly slot 1011, and the main body portion 1042 is used to realize the locking cooperation with the locking portion 61. The lock plate 104 is provided in an integrated structure, which effectively reduces the number of parts, facilitates assembly and operation, and meets the locking function.

[0060] The sliding of the mounting portion 1041 in the assembly slot 1011 is along the length direction of the assembly slot 1011, specifically parallel to the axis direction of the assembly slot 1011. When the lock plate 104 needs to realize the locking function, the lock plate 104 is pulled out of the assembly slot 1011 and abuts against the locking portion 61, so as to realize the locking of the lever 101 relative to the locking portion 61. When unlocking is needed, the lock plate 104 is pushed back into the assembly slot 1011, so as to unlock the lock plate 104 and the locking portion 61.

[0061] Referring to Figure 6 and Figure 7 , the first boss 1043 is arranged on the surface of the mounting portion 1041, the second boss 1012 is arranged on the slot wall of the assembly slot 1011 and corresponds to the first boss 1043, and the second boss 1012 is located at the slot opening of the assembly slot 1011. When the mounting portion 1041 slides outwards in the assembly slot 1011, the second boss 1012 can correspondingly block the first boss 1043, so as to prevent the mounting portion 1041 from sliding out of the assembly slot 1011, and further avoid the lock plate 104 from separating from the lever 101. This design form has the characteristics of simple structure and stable cooperation.

[0062] Referring to Figures 6 to 8 , in some examples, the limiting structure further includes a limiting groove 1044 arranged on the mounting portion 1041 and a limiting rod 1013 arranged in the assembly slot 1011, and the limiting groove 1044 is matched with the limiting rod 1013.

[0063] The limiting cooperation of the limiting groove 1044 and the limiting rod 1013 can further improve the assembly stability of the lock plate 104 in the assembly slot 1011, and prevent the lock plate 104 from automatically sliding out of the assembly slot 1011 due to shaking in the assembly slot 1011.

[0064] In an alternative embodiment, the limiting groove 1044 can be formed along the length direction of the main body part 1042, and the limiting rod 1013 can be arranged along the length direction of the assembly groove 1011, and the two can be in sliding limiting cooperation. Alternatively, the limiting groove 1044 can be arranged on the side of the mounting part 1041 facing the groove bottom of the assembly groove 1011, and the limiting rod 1013 can be arranged on the groove bottom of the assembly groove 1011, and the two can be in fixed cooperation after the lock plate 104 is completely inserted into the assembly groove 1011.

[0065] Referring to Figure 8 In the present embodiment, the push rod 101 is provided with a through hole 1014, the through hole 1014 is communicated with the assembly groove 1011, and the limiting rod 1013 is arranged in the middle part of the through hole 1014, which is equivalent to being arranged at the groove bottom of the assembly groove 1011. The limiting groove 1044 is formed on the side of the mounting part 1041 facing the groove bottom of the assembly groove 1011, and the limiting groove 1044 and the limiting rod 1013 are in limiting cooperation after the lock plate 104 is completely inserted into the assembly groove 1011.

[0066] The limiting rod 1013 and the limiting groove 1044 can be in transition cooperation or interference cooperation, so as to ensure that the limiting rod 1013 can effectively support the limiting groove 1044. In addition, the arrangement of the limiting rod 1013 in the through hole 1014 can also enhance the strength of the push rod 101, so as to avoid deformation of the hollow push rod 101 under stress.

[0067] Referring to Figure 6 In some examples, the lock plate 104 further comprises an elastic part 1045, the elastic part 1045 and the first boss 1043 are located on opposite sides of the lock plate 104, and the elastic part 1045 is provided with a convex rib 1046, and the convex rib 1046 is elastically abutted against the groove wall of the assembly groove 1011.

[0068] Firstly, the elastic force generated by the elastic part 1045 makes the convex rib 1046 always tightly abut against the groove wall, effectively eliminating the shaking gap of the lock plate 104 in the assembly groove 1011, and ensuring the stability of the sliding process. Secondly, the friction force generated by the elastic contact can play a positioning role, so that the lock plate 104 can be kept at the current position without external force, preventing accidental displacement due to vibration and the like.

[0069] The elastic part 1045 comprises a part extending from the main body part 1042, and a relief space is provided between the elastic part 1045 and the main body part 1042, which can provide a deformation space for the elastic part 1045. The elastic part 1045 and the first boss 1043 are respectively located on opposite sides of the mounting part 1041. The elastic part 1045 is provided with a protruding convex rib 1046 structure, which will continuously and elastically abut against the inner groove wall of the assembly groove 1011 after the lock plate 104 is assembled into the assembly groove 1011, forming stable elastic contact.

[0070] With reference to Figure 6 The cross-sectional shape of the convex rib 1046 is designed to be a gradually changing arc, so that it can smoothly transition during sliding. When the lock plate 104 slides in the assembly slot 1011, the convex rib 1046 will adaptively deform with the slight unevenness of the slot wall, ensuring smooth movement and maintaining the necessary frictional resistance. This elastic structure design not only ensures reliable function, but also greatly improves the comfort of the operation feel.

[0071] With reference to Figure 6 In some examples, a pull rod 1047 is arranged on the main body portion 1042, located on the side of the main body portion 1042 away from the mounting portion 1041, and the pull rod 1047 is used to operate and control the sliding position of the lock plate 104 in the assembly slot 1011.

[0072] The arrangement of the pull rod 1047 on the lock plate 104 makes it convenient for the operator to control the sliding position of the lock plate 104 in the assembly slot 1011 by pulling the pull rod 1047, and has the characteristics of simple structure, easy processing and manufacturing, and easy assembly.

[0073] Specifically, the pull rod 1047 is arranged on the main body portion 1042, away from the end of the mounting portion 1041, and the pull rod 1047 is located at the top end of the main body portion 1042 and extends away from the main body portion 1042. The length and shape of the pull rod 1047 are optimized to ensure sufficient operating leverage, making the operation smooth and labor-saving, and to avoid occupying too much space inside the circuit breaker.

[0074] When it is necessary to lock the handle assembly 100, the operator only needs to pull the pull rod 1047 out of the assembly slot 1011, which can drive the entire lock plate 104 to slide out of the assembly slot 1011, so that the end of the lock plate 104 engages with the locking portion 61; when it is necessary to unlock, the pull rod 1047 is pushed in the opposite direction, so that the lock plate 104 retracts into the assembly slot 1011.

[0075] The surface of the pull rod 1047 can be provided with anti-slip patterns or rubber sleeves to enhance the grip feeling during operation. This design of external pull rod 1047 makes the operation of the lock plate 104 more intuitive and convenient, and the locking and unlocking actions can be completed without the aid of tools, greatly improving the convenience and efficiency of the operation of the handle assembly 100. At the same time, the obvious position design of the pull rod 1047 also plays the role of operation indication, so that the operator can clearly judge the current position state of the lock plate 104.

[0076] With reference to Figure 2 and Figure 6In some examples, the main body 1042 is further provided with a padlock hole 1048, when the main body 1042 slides out of the assembly groove 1011, the main body 1042 abuts against the locking portion 61, and the padlock hole 1048 can be padlocked to limit the return of the lock plate 104.

[0077] The design of the padlock hole 1048 realizes the safe locking function of the handle assembly 100, which can further improve the safety of the breaker opening and closing operation in cooperation with the locking portion 61, avoiding the personnel from mistakenly operating to push the lock plate 104 back into the assembly groove 1011 and close the breaker, thereby playing a role in protecting the safety of the circuit maintenance personnel.

[0078] When the breaker is in the open state, only by pulling out the lock plate 104 and cooperating with the locking portion 61 to lock the cooperation form of the lever 101 to lock the open state, there is a possibility that the personnel will mistakenly push the lock plate 104 back and operate the lever 101 to close the breaker, and the safety is low. The padlock hole 1048 provided on the main body 1042 can be exposed after the lock plate 104 is pulled out of the assembly groove 1011, and the operator can lock it to avoid the situation that the lock plate 104 is mistakenly pushed back. The structure is simple and reliable, which not only retains the convenience of fast operation, but also provides a locking solution that meets the safety standards.

[0079] Referring to Figure 6 and Figure 7 In some examples, the assembly groove 1011 further includes a first limiting edge 1015 and a second limiting edge 1016 arranged oppositely, and the first boss 1043 is limited to slide between the first limiting edge 1015 and the second limiting edge 1016.

[0080] By arranging the first limiting edge 1015 and the second limiting edge 1016 in the assembly groove 1011, an accurate guide channel can be formed in the assembly groove 1011, and the first boss 1043 on the mounting portion 1041 of the lock plate 104 is limited in this guide channel, so that the lock plate 104 can always keep stable during the sliding process in the assembly groove 1011, effectively preventing the lock plate 104 from being skewed or stuck during the movement.

[0081] At the same time, the side of the mounting portion 1041 provided with the first boss 1043 can abut against the first limiting edge 1015 and the second limiting edge 1016, which can increase the contact area of the mounting portion 1041 in the assembly groove 1011, and is beneficial to further improve the assembly stability.

[0082] Referring to Figure 7The first limiting edge 1015 and the second limiting edge 1016 are parallel to each other and oppositely arranged, and extend along the length direction of the assembly groove 1011, which is consistent with the sliding direction of the lock plate 104. The surfaces of the first limiting edge 1015 and the second limiting edge 1016 can be provided with lubricating grooves to further improve the sliding performance. The contact surfaces of the mounting portion 1041 and the first limiting edge 1015 and the second limiting edge 1016 can be appropriately arc processed to reduce the contact stress. The innovative double-limiting design not only ensures the accuracy of the movement of the lock plate 104, but also simplifies the assembly process, improves the production efficiency, and provides an important guarantee for the reliable operation of the circuit breaker.

[0083] With reference to Figure 8 and Figure 9 In some examples, the rotating part 102 includes a rotating shaft 7 hole connected to the clamping plate through the rotating shaft 7 and a mounting groove 1022 provided on the side of the rotating shaft 7 hole, and a torsional spring 105 is arranged in the mounting groove 1022. The torsional spring 105 has a first force arm 1051 fixed to the rotating part 102 and a second force arm 1052 fixed to the clamping plate, so as to realize the automatic reset function of the handle assembly 100.

[0084] Only the rotating shaft 7 hole is arranged on the rotating part 102, and only the rotating shaft 7 needs to be inserted during assembly to realize the rotating connection, which is simple in structure and convenient for processing and assembly. The mounting groove 1022 for mounting the torsional spring 105 is arranged on the side of the rotating shaft 7 hole, so that the torsional spring 105 can be sleeved on the rotating shaft 7, and the function of automatically resetting the handle assembly 100 is realized by the torsional spring 105, which is convenient for switching the handle assembly 100 from the closed position to the open position, and the structure is simple and reliable.

[0085] Specifically, the rotating part 102 is located between the first clamping plate 4 and the second clamping plate 5, and the rotating shaft 7 is simultaneously inserted into the first clamping plate 4, the rotating part 102 and the second clamping plate 5 during assembly, so as to realize the rotating connection of the rotating part 102. This connection mode not only ensures the smoothness of rotation, but also ensures the stability of the structure.

[0086] In an alternative embodiment, the rotating connection between the rotating part 102 and the first clamping plate 4 and the second clamping plate 5 can also be in the form of integrally arranging the rotating shaft 7 on the rotating part 102 and opening holes in the corresponding positions of the first clamping plate 4 and the second clamping plate 5, or in the form of connecting a pin shaft on the rotating part 102. Both forms can realize the rotating connection while having good structural stability.

[0087] The mounting groove 1022 is arranged on the side of the rotating shaft 7 hole, which can provide a stable assembly position for the torsional spring 105, not only facilitating the force provided by the torsional spring 105 to act on the rotating part 102 and rotate around the rotating center, but also making the structure of the rotating part 102 more compact and saving installation space.

[0088] Wherein, referring to Figure 9 The first force arm 1051 of the torsion spring 105 is fixed on the rotating part 102, and specifically, the mounting groove 1022 is further provided with a positioning groove 1023, and the first force arm 1051 is fixedly installed in the positioning groove 1023. The second force arm 1052 of the torsion spring 105 is fixed on the first clamping plate 4, and specifically, the first clamping plate 4 is provided with a positioning protrusion 42, and the second force arm 1052 abuts against the positioning protrusion 42.

[0089] When the handle assembly 100 is in the open position, the torsion spring 105 can be in a relaxed state or only a small amount of energy exists, and when the operating lever 101 is rotated to the closed position, the torsion spring 105 stores a large amount of energy, and when the opening is needed, the energy can be quickly released to drive the handle assembly 100 to rotate to the open position.

[0090] Referring to Figure 4 and Figure 5 In some examples, the linkage part 103 includes an extension rod 1031 extending from the rotating part 102 and a through hole 1032 provided at the end of the extension rod 1031, and the through hole 1032 is connected with the connecting rod shaft 3.

[0091] The linkage part 103 adopts the extension rod 1031 extending from the rotating part 102, which facilitates the position matching of the connecting rod shaft 3 and ensures that the rotating path of the linkage part 103 with the rotating part 102 is the same as the moving path of the connecting rod shaft 3 in the arc-shaped sliding groove 41 and the movable hole 51, so as to realize the accurate matching between the handle assembly 100 and the connecting rod shaft 3.

[0092] The extension rod 1031 extends from the rotating part 102 to the position close to the connecting rod shaft 3, compared with the through hole 1032 provided on the rotating part 102, the present embodiment can provide a more suitable rotating path for the connecting rod shaft 3, instead of limiting the moving path of the connecting rod shaft 3 to the rotating path of the rotating part 102. Compared with separately connecting an extension structure on the rotating part 102, the present embodiment has higher structural strength and eliminates the possible weak points of the traditional welding or bolt connection mode.

[0093] The through hole 1032 is provided for connecting the connecting rod shaft 3, and the connecting rod shaft 3 is in gap cooperation with the through hole 1032 in the through hole 1032, so that the connecting rod shaft 3 can rotate relative to the through hole 1032 during the movement of the linkage part 103 driving the connecting rod shaft 3, thereby avoiding the occurrence of the movement dead point to affect the smooth performance of the opening and closing process.

[0094] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A handle assembly for use in a circuit breaker, characterized in that, The handle comprises a turning part, a linkage part and a lever, the lever and the linkage part are arranged on the periphery of the turning part, and the lever is spaced apart from the linkage part; The turning part is rotatably connected between a pair of clamping plates of the circuit breaker, and the linkage part is connected with a linkage shaft of the circuit breaker; The lever is provided with an assembly groove, and the lock plate is installed in the assembly groove through a limiting structure, and part of the lock plate can extend out of the assembly groove to be connected with a locking part of the circuit breaker. The lock plate comprises an installation part and a main body part, the installation part is slidably installed in the assembly groove, the limiting structure comprises a first boss arranged on the installation part and a second boss arranged in the assembly groove, and the first boss can be clamped on the side of the second boss away from the assembly groove.

2. The handle assembly of claim 1, wherein, The limiting structure further comprises a limiting groove arranged on the installation part and a limiting rod arranged in the assembly groove, and the limiting groove is matched with the limiting rod.

3. The handle assembly of claim 2, wherein, The lock plate further comprises a resilient part, the resilient part and the first boss are located on opposite sides of the lock plate, a protruding rib is arranged on the resilient part, and the protruding rib elastically abuts against the groove wall of the assembly groove.

4. The handle assembly of claim 2, wherein, A pull rod is arranged on the main body part, the pull rod is located on the side of the main body part away from the installation part, and the pull rod is used for operation control of the sliding position of the lock plate in the assembly groove.

5. The handle assembly of claim 2, wherein, The main body part is further provided with a padlock hole, when the main body part slides out of the assembly groove, the main body part abuts against the locking part, and the padlock hole can be hung with a padlock to limit the reset of the lock plate.

6. The handle assembly of claim 5, wherein, The assembly groove further comprises a first limiting edge and a second limiting edge arranged oppositely, and the first boss is slidably limited between the first limiting edge and the second limiting edge.

7. The handle assembly of claim 2, wherein, The turning part comprises a rotating shaft hole and an installation groove arranged on the periphery of the rotating shaft hole, the rotating shaft hole is connected with the clamping plate through a rotating shaft, a torsional spring is arranged in the installation groove, the torsional spring has a first force arm fixed to the turning part and a second force arm fixed to the clamping plate, so as to realize the automatic reset function of the handle.

8. The handle assembly of any one of claims 1-7, wherein, The linkage part comprises an extension rod extending from the turning part and a through hole arranged at the end of the extension rod, and the through hole is connected with the linkage shaft.

9. A handle assembly according to any one of claims 1-7, wherein, The handle assembly comprises a first clamping plate and a second clamping plate arranged oppositely, a linkage shaft connected movably, a locking part and the handle assembly according to any one of claims 1-9, the handle assembly is rotatably connected between the first clamping plate and the second clamping plate, the linkage part is connected with the linkage shaft, and the lock plate can be selectively engaged with the locking part to limit the movement of the handle.

10. A circuit breaker characterized by, ​

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