Auxiliary mechanism of universal circuit breaker operating mechanism and operating mechanism

Abstract

The utility model relates to the technical field of electrical connection devices, in particular to an auxiliary mechanism of a universal circuit breaker operating mechanism and the operating mechanism. The auxiliary mechanism comprises a first side plate, a second side plate and a bearing set. The bearing pack at least comprises a first rolling bearing, a second rolling bearing, a third rolling bearing, a fourth rolling bearing and a fifth rolling bearing which are arranged to radially limit the main shaft in a closed state; and the second rolling bearing, the third rolling bearing and the fifth rolling bearing are arranged to limit the main shaft in an opening state. Based on the auxiliary mechanism provided by the invention, compared with the related technology, the number of the rolling bearings in the bearing pack is increased, so that the two rolling bearings on the first side plate can radially limit the main shaft no matter the auxiliary mechanism is in a switching-on state or a switching-off state, and therefore, the position stability of the main shaft in the switching-on state and the switching-off state is improved.

Description

Technical Field

[0001] This application relates to the field of electrical connection device technology, and in particular to an auxiliary mechanism and operating mechanism for a universal circuit breaker operating mechanism. Background Technology

[0002] Universal circuit breakers are core protection devices in low-voltage power distribution systems and can be used in power distribution system protection, motor control, and new energy fields. When a circuit is subjected to abnormal conditions such as short circuit, overload, or undervoltage, the universal circuit breaker trips quickly to prevent circuit components from burning out and personal safety accidents from occurring.

[0003] The operating mechanism is a key component of a universal circuit breaker, responsible for performing opening and closing actions. Especially in large-frame products, due to the large number of conductive circuits, the main mechanism and auxiliary mechanism need to work together to ensure the effective opening and closing of the circuit breaker.

[0004] For multi-stage universal circuit breakers, the main shaft in the operating mechanism is long and heavy. Due to factors such as the weight of the main shaft, the machining accuracy of parts and assembly tolerances, the existing auxiliary mechanism has weak radial limit on the main shaft, resulting in unstable main shaft position, which in turn affects the stability of the circuit breaker in the closing and opening states. Utility Model Content

[0005] This application provides an auxiliary mechanism and an operating mechanism for a universal circuit breaker, which can improve the positional stability of the main shaft in the open and closed states, making the working state of the universal circuit breaker more stable.

[0006] The technical solution of this utility model is as follows:

[0007] In one aspect, this application provides an auxiliary mechanism for the operating mechanism of a universal circuit breaker, including a first side plate, a second side plate, and a bearing assembly.

[0008] Along the first direction, the first side plate and the second side plate are arranged opposite to each other. Along the second direction, the first side plate has a first receiving groove at the end facing the main shaft, and the second side plate has a second receiving groove at the end facing the main shaft. The first receiving groove and the second receiving groove are used to receive the main shaft. There are gaps between the groove wall of the first receiving groove, the groove wall of the second receiving groove and the main shaft. The second direction intersects the first direction.

[0009] The bearing assembly includes at least a first rolling bearing, a second rolling bearing, a third rolling bearing, a fourth rolling bearing, and a fifth rolling bearing. The first, second, and third rolling bearings are disposed on the side of the first side plate and arranged in an arc along the edge of the first receiving groove. The fourth and fifth rolling bearings are disposed on the side of the second side plate and arranged in an arc along the edge of the second receiving groove.

[0010] The first, second, fourth, and fifth rolling bearings are configured to radially limit the main shaft in the closed state, and the second, third, and fifth rolling bearings are configured to limit the main shaft in the open state.

[0011] Based on the auxiliary mechanism provided in the first aspect, compared with related technologies, by increasing the number of rolling bearings in the bearing assembly, each side plate of the auxiliary mechanism has two rolling bearings that can radially limit the main shaft when the auxiliary mechanism is closed, thus improving the positional stability of the main shaft when the circuit is closed. Furthermore, when the auxiliary mechanism is open, the first side plate also has two rolling bearings that can radially limit the main shaft, thus improving the positional stability of the main shaft when the circuit is open.

[0012] In one possible design, at least one of the first, second, and third rolling bearings is riveted to the first side plate. At least one of the fourth and fifth rolling bearings is riveted to the second side plate.

[0013] Based on the auxiliary mechanism provided by this embodiment, during the rotation of the main shaft, each bearing in the bearing assembly experiences rolling friction with the main shaft. The first rolling bearing, the second rolling bearing, and the third rolling bearing are riveted to the first side plate, and the fourth rolling bearing and the fifth rolling bearing are riveted to the second side plate. This prevents the first rolling bearing, the second rolling bearing, and the third rolling bearing from becoming loose relative to the first side plate during use, and also prevents the fourth rolling bearing and the fifth rolling bearing from becoming loose relative to the second side plate during use, thereby improving the reliability of the auxiliary mechanism.

[0014] In one possible design, the bearing assembly also includes a sixth rolling bearing, which is disposed on the side of the second side plate, and both the third and sixth rolling bearings are symmetrical about the centerline of the first and second side plates.

[0015] Based on the auxiliary mechanism provided by this embodiment, in the closed state, the fourth and fifth rolling bearings radially limit the spindle. In the open state, the fifth and sixth rolling bearings radially limit the spindle. This helps to further improve the positional stability of the spindle in both the closed and open states.

[0016] In one possible design, the auxiliary mechanism also includes a tripping limit part fixedly disposed relative to the first side plate. The tripping limit part cooperates with the cantilever on the main shaft to limit the position of the main shaft when the circuit is tripped.

[0017] Based on the auxiliary mechanism provided in this embodiment, the cantilever cooperates with the tripping limit part and is fixed on the main shaft. During the tripping process, the main shaft needs to rotate a certain angle and then stop to reach the predetermined tripping position. This application provides a tripping limit part in the auxiliary mechanism. When the main shaft rotates to the predetermined angle, the cantilever contacts the tripping limit part, restricting the main shaft from continuing to rotate and keeping it in the predetermined position, thereby improving the operational reliability of the universal circuit breaker.

[0018] In one possible design, the tripping limit unit is fixed between the first side plate and the second side plate.

[0019] Based on the auxiliary mechanism provided in this embodiment, the tripping limit part is fixed between the first side plate and the second side plate. This helps to improve the support strength of the tripping limit part, thereby improving its operational reliability. Furthermore, fixing the tripping limit part between the first side plate and the second side plate also makes the overall structure of the auxiliary mechanism more compact.

[0020] In one possible design, one end of the trip limit switch is riveted to the first side plate, and the other end is threadedly fastened to the second side plate. This prevents the trip limit switch from loosening during use and also makes installation more convenient.

[0021] In one possible design, the auxiliary mechanism also includes a cover plate disposed on the side of the first side plate and the second side plate away from the main shaft, for covering the space between the first side plate and the second side plate.

[0022] Based on the auxiliary mechanism provided by this embodiment, a cover plate is provided on the side of the first side plate and the second side plate away from the main shaft, which can block the arc-extinguishing gas from continuing to flow, thereby helping to maintain the gas pressure in the arc-extinguishing chamber and promoting the extinction of the electric arc.

[0023] In one possible design, the cover plate includes a first end and a second end opposite to each other. Both the first and second side plates are provided with latches opposite to the first end, the two latches are arranged side by side, the first end of the cover plate is engaged with the two latches, and the cover plate is rotatable relative to the two latches.

[0024] A first connecting ear is provided on one side of the second end, extending toward the side of the first side plate, and a second connecting ear is provided on the other side of the second end, extending toward the side of the second side plate. The first connecting ear is threadedly fastened to the first side plate, and the second connecting ear is threadedly fastened to the second side plate.

[0025] Based on the auxiliary mechanism provided in this embodiment, the first end of the cover plate is snapped into the first side plate and the second side plate, and the second end of the cover plate is threadedly fastened to the first side plate and the second side plate. This connection method is relatively simple, easy to operate, and can save screws.

[0026] Secondly, based on the same inventive concept, this application also provides an operating mechanism, which includes a main shaft, a main mechanism, and an auxiliary mechanism.

[0027] The main shaft is used to drive the moving contact, realizing the closing and opening of the universal circuit breaker.

[0028] The main mechanism is used to mount the spindle and provide the main power for the spindle rotation.

[0029] The two auxiliary mechanisms are either of the above-mentioned auxiliary mechanisms. The auxiliary mechanisms and the main mechanism are arranged side by side along the length of the main shaft, and the main shaft passes through the first receiving groove and the second receiving groove.

[0030] The operating mechanism provided in the second aspect includes the auxiliary mechanism provided in the first aspect. Its beneficial effects can be found in the first aspect and the beneficial effects of various possible implementations of the first aspect, and will not be repeated here.

[0031] In one possible design, the number of auxiliary mechanisms is one or two.

[0032] Based on the operating mechanism provided in this embodiment, the number of auxiliary mechanisms is one. This operating mechanism is generally used when two three-phase circuit breakers are used together. A main mechanism and an auxiliary mechanism are arranged in the length direction of the main shaft. In this way, the auxiliary mechanism can help the main mechanism support the main shaft and perform radial limiting on the main shaft in the closed and open states.

[0033] There are two auxiliary mechanisms. This operating mechanism is generally used when two four-phase circuit breakers are used together. For a universal circuit breaker with this structure, the operating mechanism needs to control the eight conductive circuits of the two four-phase circuit breakers. The main shaft will be longer. The two auxiliary mechanisms work together with the main mechanism to better support the main shaft and to more effectively limit the radial movement of the main shaft in the closing and opening states. Attached Figure Description

[0034] Figure 1 The diagram shown is a structural schematic of a universal circuit breaker provided in an embodiment of this application.

[0035] Figure 2 A schematic diagram of the structure of a universal circuit breaker operating mechanism provided in this application embodiment.

[0036] Figure 3 This is a schematic diagram of an auxiliary mechanism for the universal circuit breaker operating mechanism provided in an embodiment of this application.

[0037] Figure 4 for Figure 3 Exploded view.

[0038] Figure 5 for Figure 3A schematic diagram of the structure of the first side plate in the auxiliary mechanism shown.

[0039] Figure 6 for Figure 3 A schematic diagram of the structure of the second side plate in the auxiliary mechanism shown.

[0040] Figure 7 for Figure 3 The diagram shows the cooperation structure between the auxiliary mechanism and the main shaft.

[0041] Figure 8 This is a schematic diagram of the assembly structure of the cover plate, the first side plate, and the second side plate in the auxiliary mechanism provided in the embodiments of this application.

[0042] The attached figures are labeled as follows:

[0043] 1. Operating mechanism;

[0044] 11. Spindle;

[0045] 12. Main organization;

[0046] 13. Auxiliary mechanisms;

[0047] 131. First side plate; 1311. First receiving groove; 1312. Bayonet;

[0048] 132. Second side plate; 1321. Second receiving groove;

[0049] 133. First rolling bearing; 134. Second rolling bearing; 135. Third rolling bearing; 136. Fourth rolling bearing; 137. Fifth rolling bearing; 138. Opening limit switch;

[0050] 139. Cover plate; 1391. First end; 1392. Second end; 1393. First connecting lug; 1394. Second connecting lug;

[0051] 14. Cantilever;

[0052] 2. Universal circuit breaker body. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0054] 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 this application belongs. The terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The terms “comprising” and “having”, and any variations thereof, in the specification, claims, and drawings of this application are intended to cover non-exclusive inclusion.

[0055] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0056] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists, A and B exist simultaneously, or B exists. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0057] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0058] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection. A physical connection can be a fixed connection, such as a connection secured by spacers, screws, bolts, or other spacers. A physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection. A physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0059] The present application will be described in detail below with reference to the accompanying drawings.

[0060] Figure 1 The diagram shown is a structural schematic of a universal circuit breaker provided in an embodiment of this application. Figure 2 A schematic diagram of the structure of a universal circuit breaker operating mechanism provided in this application embodiment.

[0061] Please refer to Figure 1 and Figure 2 Universal circuit breakers are generally multi-stage circuit breakers, including multiple contact assemblies arranged in parallel. These multiple contact assemblies are controlled to open and close through the same operating mechanism 1.

[0062] like Figure 1 , Figure 2 As shown, the operating mechanism 1 typically includes a main shaft 11, a main mechanism 12, and two auxiliary mechanisms 13. The main shaft 11 drives the moving contacts to achieve the closing and opening of the universal circuit breaker. The main mechanism 12 mounts the main shaft 11 and provides the main power for its rotation. Along the length of the main shaft 11, the two auxiliary mechanisms 13 are located on both sides of the main mechanism 12, serving to support the main shaft 11 and provide radial limiting for it.

[0063] Please continue to refer to this. Figure 1 and Figure 2 For multi-stage universal circuit breakers, the main shaft 11 in the operating mechanism 1 is relatively long and heavy. Due to factors such as the weight of the main shaft 11, the machining accuracy of the parts, and the assembly tolerance, the existing auxiliary mechanism 13 has a weak radial limit on the main shaft 11, which leads to the instability of the position of the main shaft 11 and thus affects the stability of the circuit breaker in the closing and opening states.

[0064] In view of this, this application provides an auxiliary mechanism for the universal circuit breaker operating mechanism. Figure 3 This is a schematic diagram of an auxiliary mechanism for the universal circuit breaker operating mechanism provided in an embodiment of this application. Figure 4 for Figure 3 Exploded view. Figure 5 for Figure 3 A schematic diagram of the structure of the first side plate in the auxiliary mechanism shown. Figure 6 for Figure 3 A schematic diagram of the structure of the second side plate in the auxiliary mechanism shown.

[0065] Please combine Figures 1 to 6 The auxiliary mechanism 13 of the universal circuit breaker operating mechanism 1 provided in this application includes a first side plate 131, a second side plate 132 and a bearing assembly.

[0066] Along the first direction D1, the first side plate 131 and the second side plate 132 are arranged opposite to each other. Along the second direction D2, the first side plate 131 has a first receiving groove 1311 at the end facing the main shaft 11, and the second side plate 132 has a second receiving groove 1321 at the end facing the main shaft 11. The first receiving groove 1311 and the second receiving groove 1321 are used to receive the main shaft 11. There are gaps between the groove wall of the first receiving groove 1311, the groove wall of the second receiving groove 1321 and the main shaft 11. The second direction D2 intersects the first direction D1.

[0067] The bearing assembly includes at least a first rolling bearing 133, a second rolling bearing 134, a third rolling bearing 135, a fourth rolling bearing 136, and a fifth rolling bearing 137. The first rolling bearing 133, the second rolling bearing 134, and the third rolling bearing 135 are disposed on the side of the first side plate 131 and arranged in an arc along the edge of the first receiving groove 1311. The fourth rolling bearing 136 and the fifth rolling bearing 137 are disposed on the side of the second side plate 132 and arranged in an arc along the edge of the second receiving groove 1321.

[0068] The first rolling bearing 133, the second rolling bearing 134, the fourth rolling bearing 136, and the fifth rolling bearing 137 are configured to radially limit the main shaft 11 in the closed state, and the second rolling bearing 134, the third rolling bearing 135, and the fifth rolling bearing 137 are configured to limit the main shaft 11 in the open state.

[0069] Please continue to refer to this. Figures 1 to 6 In this application, the main shaft 11 is disposed on one side of the universal circuit breaker body 2. The first side plate 131 of the auxiliary mechanism 13 is provided with a first receiving groove 1311 for accommodating the main shaft 11, and the second side plate 132 of the auxiliary mechanism 13 is provided with a second receiving groove 1321 for accommodating the main shaft 11. The main shaft 11 is clearance-fitted with the first receiving groove 1311 and the second receiving groove 1321. Thus, the auxiliary mechanism 13 can be disposed on the side of the main shaft 11 away from the universal circuit breaker body 2 through the first receiving groove 1311 and the second receiving groove 1321. Under normal circumstances, the main shaft 11 will not rub against the first side plate 131 and the second side plate 132, which is beneficial to the rotation of the main shaft 11.

[0070] Please combine Figure 2 , Figure 3 , Figure 5 and Figure 6 The first rolling bearing 133, the second rolling bearing 134, and the third rolling bearing 135 are arranged in an arc along the edge of the first receiving groove 1311, and the fourth rolling bearing 136 and the fifth rolling bearing 137 are arranged in an arc along the edge of the second receiving groove 1321. In this way, under ideal conditions, the outer circles of the first rolling bearing 133, the second rolling bearing 134, the third rolling bearing 135, the fourth rolling bearing 136, and the fifth rolling bearing 137 can all be tangent to the main shaft 11, and each bearing can play a good radial limiting role for the main shaft 11.

[0071] In related technologies, both the first side plate 131 and the second side plate 132 are provided with only two rolling bearings on their sides. One bearing is used to radially limit the spindle 11 in the closed state, and the other bearing is used to radially limit the spindle 11 in the open state. Ideally, this structure can effectively limit the position of the spindle 11 in both the closed and open states. However, in practical applications, due to factors such as machining tolerances, assembly tolerances, the force on the spindle 11 itself, and the force in both the closed and open states, in the open state, a single rolling bearing on the side of the first side plate 131 or the second side plate 132 is insufficient to effectively limit the spindle 11 radially. In the closed state, a single rolling bearing on the side of the first side plate 131 or the second side plate 132 is also insufficient to effectively limit the spindle 11 radially.

[0072] Please combine Figure 2 and Figure 3 In this application, the first rolling bearing 133, the second rolling bearing 134, the fourth rolling bearing 136, and the fifth rolling bearing 137 are configured to radially limit the spindle 11 in the closed state. This is equivalent to having two rolling bearings on each side of the first side plate 131 and the second side plate 132 radially limiting the spindle 11 in the closed state. The two rolling bearings work together on the spindle 11, which helps improve the positional stability of the spindle 11 in the closed state.

[0073] Please continue to refer to this. Figure 2 and Figure 3 In this application, the second rolling bearing 134 and the third rolling bearing 135 on the side of the first side plate 131, and the fifth rolling bearing 137 outside the second side plate 132 are configured to radially limit the main shaft 11 in the open state. In this way, the two rolling bearings on the side of the first side plate 131 radially limit the main shaft 11 in the open state. The two rolling bearings work together on the main shaft 11, which helps to improve the positional stability of the main shaft 11 in the open state.

[0074] In summary, compared with related technologies, the auxiliary mechanism 13 provided in this application increases the number of rolling bearings in the bearing assembly, ensuring that each side plate of the auxiliary mechanism 13 has at least two rolling bearings that can radially limit the spindle 11 when the circuit is closed, thus improving the positional stability of the spindle 11 in the closed state. Furthermore, when the circuit is open, the first side plate 131 also has at least two rolling bearings that can radially limit the spindle 11, thus improving the positional stability of the spindle 11 in the open state.

[0075] It should be noted that in some embodiments of this application, the bearings in the bearing assembly may be needle roller bearings, while in other embodiments, the bearings in the bearing assembly may be other types of rolling bearings, such as ball bearings. In some embodiments of this application, the first direction D1 is perpendicular to the second direction D2.

[0076] Please combine Figure 3 and Figure 4 In some embodiments of this application, at least one of the first rolling bearing 133, the second rolling bearing 134, and the third rolling bearing 135 is riveted to the first side plate 131. At least one of the fourth rolling bearing 136 and the fifth rolling bearing 137 is riveted to the second side plate 132.

[0077] Specifically, during the rotation of the main shaft 11, the bearings in the bearing assembly experience rolling friction with the main shaft 11. The first rolling bearing 133, the second rolling bearing 134, and the third rolling bearing 135 are riveted to the first side plate 131, and the fourth rolling bearing 136 and the fifth rolling bearing 137 are riveted to the second side plate 132. This prevents the first rolling bearing 133, the second rolling bearing 134, and the third rolling bearing 135 from becoming loose relative to the first side plate 131 during use, and also prevents the fourth rolling bearing 136 and the fifth rolling bearing 137 from becoming loose relative to the second side plate 132 during use, thereby improving the reliability of the auxiliary mechanism 13.

[0078] Please continue to refer to this. Figure 3 In some embodiments of this application, the bearing assembly further includes a sixth rolling bearing, which is disposed on the side of the second side plate 132. The third rolling bearing 135 and the sixth rolling bearing are symmetrical about the center line of the first side plate 131 and the second side plate 132.

[0079] Thus, a fourth rolling bearing 136, a fifth rolling bearing 137, and a sixth rolling bearing are installed on the second side plate 132. In the closed state, the fourth rolling bearing 136 and the fifth rolling bearing 137 provide radial restraint for the main shaft 11. In the open state, the fifth rolling bearing 137 and the sixth rolling bearing provide radial restraint for the main shaft 11. This helps to improve the positional stability of the main shaft 11 in both the closed and open states.

[0080] Figure 7 for Figure 3 Please refer to the schematic diagram of the auxiliary mechanism's cooperation with the main spindle. Figure 7 In some embodiments of this application, the auxiliary mechanism 13 further includes a circuit breaker limiting part 138 fixedly disposed relative to the first side plate 131. The circuit breaker limiting part 138 cooperates with the cantilever 14 on the main shaft 11 to limit the position of the main shaft 11 when the circuit breaker is opened.

[0081] Specifically, the cantilever 14 engages with the tripping limit part 138 and is fixed to the main shaft 11. During the tripping process, the main shaft 11 needs to rotate a certain angle and then stop to reach the predetermined tripping position. This application provides a tripping limit part 138 in the auxiliary mechanism 13. When the main shaft 11 rotates to the predetermined angle, the cantilever 14 contacts the tripping limit part 138, limiting the main shaft 11 from continuing to rotate and keeping it in the predetermined position, thereby improving the operational reliability of the universal circuit breaker.

[0082] Please combine Figure 4 and Figure 7 In some embodiments of this application, the tripping limit part 138 is fixed between the first side plate 131 and the second side plate 132.

[0083] When the tripping limit part 138 restricts the main shaft 11 from continuing to rotate, it also bears the driving force from the main shaft 11. Fixing the tripping limit part 138 between the first side plate 131 and the second side plate 132 helps to improve the support strength of the tripping limit part 138, thereby enhancing its operational reliability. Furthermore, fixing the tripping limit part 138 between the first side plate 131 and the second side plate 132 makes the overall structure of the auxiliary mechanism 13 more compact.

[0084] Please continue to refer to this. Figure 4 and Figure 7 In some embodiments of this application, the tripping limit part 138 is cylindrical, with one end riveted to the first side plate 131 and the other end threadedly fastened to the second side plate 132. This prevents the tripping limit part 138 from loosening during use and also makes installation more convenient.

[0085] It should be noted that, as Figure 4 and Figure 7 As shown, in some embodiments of this application, the tripping limit part 138 is cylindrical, which facilitates the processing of the tripping limit part 138. In other embodiments of this application, the tripping limit part 138 may also be of other shapes, as long as the mating part between the tripping limit part 138 and the cantilever 14 remains cylindrical.

[0086] Please refer to Figure 3 In some embodiments of this application, the auxiliary mechanism 13 further includes a cover plate 139, which is disposed on the side of the first side plate 131 and the second side plate 132 away from the main shaft 11, and is used to cover the space between the first side plate 131 and the second side plate 132.

[0087] Please combine Figure 1 and Figure 3One side of the main shaft 11 is the body of the universal circuit breaker, which contains a contact assembly and an arc-extinguishing chamber. When the moving contact and stationary contact in the contact assembly separate, a large amount of arc-extinguishing gas and an electric arc are generated in the arc-extinguishing chamber. The auxiliary mechanism 13 is located on the other side of the main shaft 11, where the arc-extinguishing gas easily flows. A cover plate 139 is provided on the side of the first side plate 131 and the second side plate 132 away from the main shaft 11 to block the continued flow of arc-extinguishing gas, thereby helping to maintain the gas pressure in the arc-extinguishing chamber and promoting arc extinction.

[0088] Figure 8 For a schematic diagram of the assembly structure of the cover plate, the first side plate, and the second side plate in the auxiliary mechanism provided in this application embodiment, please refer to... Figure 8 The cover plate 139 includes a first end 1391 and a second end 1392 opposite to each other. The first side plate 131 and the second side plate 132 are each provided with a latch 1312 opposite to the first end 1391. The two latches 1312 are arranged side by side. The first end 1391 of the cover plate 139 is inserted into the two latches 1312, and the cover plate 139 can rotate relative to the two latches 1312.

[0089] A first connecting ear 1393 extending toward the side of the first side plate 131 is provided on one side of the second end 1392, and a second connecting ear 1394 extending toward the side of the second side plate 132 is provided on the other side of the second end 1392. The first connecting ear 1393 is threadedly fastened to the first side plate 131, and the second connecting ear 1394 is threadedly fastened to the second side plate 132.

[0090] For details, please refer to [link / reference]. Figure 8 When installing the cover plate 139, first tilt the cover plate 139 so that the first end 1391 is engaged in the two slots 1312. Then, lower the cover plate 139 so that the first connecting lug 1393 of the cover plate 139 rotates to the side of the first side plate 131, and the second connecting lug 1394 rotates to the side of the second side plate 132. Finally, the first connecting lug 1393 is threadedly fastened to the first side plate 131, and the second connecting lug 1394 is threadedly fastened to the second side plate 132 using screws. This connection method is relatively simple, easy to operate, and saves screws.

[0091] Please continue to refer to this. Figure 1 and Figure 2 Based on the same inventive concept, this application also provides an operating mechanism 1, which includes a main shaft 11, a main mechanism 12, and an auxiliary mechanism 13. The main shaft 11 is used to drive the moving contact to realize the closing and opening of the universal circuit breaker. The main mechanism 12 is used to mount the main shaft 11 and provide the main power for the rotation of the main shaft 11. The auxiliary mechanism 13 is arranged side by side with the main mechanism 12, and the auxiliary mechanism 13 is any of the auxiliary mechanisms mentioned above. The main shaft 11 passes through the first receiving groove 1311 and the second receiving groove 1321.

[0092] The operating mechanism 1 includes the auxiliary mechanism 13 provided in this application. The beneficial effects of the various possible implementations of the auxiliary mechanism 13 are not described here.

[0093] Please refer to Figure 1 and Figure 2 In some embodiments of this application, the number of auxiliary mechanisms 13 is one or two.

[0094] Specifically, in existing applications, universal circuit breakers include three-phase and four-phase circuit breakers, and two three-phase or two four-phase circuit breakers are often combined. Whether combining two three-phase or two four-phase circuit breakers, they are all driven by a single operating mechanism 1.

[0095] In the case of merging two three-phase circuit breakers, in order to better control the six conductive circuits of the two three-phase circuit breakers, a main mechanism 12 and an auxiliary mechanism 13 need to be arranged along the length of the main shaft 11. The auxiliary mechanism 13 helps the main mechanism 12 support the main shaft 11 and performs radial limiting on the main shaft 11 in the closed and open states.

[0096] In the case of merging two four-phase circuit breakers, the main shaft 11 will be longer in order to better control the eight conductive circuits of the two four-phase circuit breakers. Therefore, two auxiliary mechanisms 13 are required to work in conjunction with the main mechanism 12. These two auxiliary mechanisms 13 are usually located on both sides of the main mechanism 12 to better support the main shaft 11 and to more effectively limit the radial movement of the main shaft 11 in the closing and opening states.

[0097] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0098] The above-described embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. An auxiliary mechanism for a universal circuit breaker operating mechanism, characterized in that, Includes the first side plate, the second side plate, and the bearing assembly; Along the first direction, the first side plate and the second side plate are disposed opposite to each other; along the second direction, the first side plate is provided with a first receiving groove at the end facing the main shaft, and the second side plate is provided with a second receiving groove at the end facing the main shaft. The first receiving groove and the second receiving groove are used to receive the main shaft. There are gaps between the groove wall of the first receiving groove, the groove wall of the second receiving groove and the main shaft. The second direction intersects with the first direction. The bearing assembly includes at least a first rolling bearing, a second rolling bearing, a third rolling bearing, a fourth rolling bearing, and a fifth rolling bearing. The first rolling bearing, the second rolling bearing, and the third rolling bearing are disposed on the side of the first side plate and arranged in an arc along the edge of the first receiving groove. The fourth rolling bearing and the fifth rolling bearing are disposed on the side of the second side plate and arranged in an arc along the edge of the second receiving groove. The first rolling bearing, the second rolling bearing, the fourth rolling bearing, and the fifth rolling bearing are configured to radially limit the main shaft in the closed state, and the second rolling bearing, the third rolling bearing, and the fifth rolling bearing are configured to limit the main shaft in the open state.

2. The auxiliary mechanism of the universal circuit breaker operating mechanism according to claim 1, characterized in that, At least one of the first rolling bearing, the second rolling bearing, and the third rolling bearing is riveted to the first side plate; at least one of the fourth rolling bearing and the fifth rolling bearing is riveted to the second side plate.

3. The auxiliary mechanism of the universal circuit breaker operating mechanism according to claim 1 or 2, characterized in that, The bearing assembly further includes a sixth rolling bearing, which is disposed on the side of the second side plate. Both the third rolling bearing and the sixth rolling bearing are symmetrical about the centerline of the first side plate and the second side plate.

4. The auxiliary mechanism of the universal circuit breaker operating mechanism according to claim 1 or 2, characterized in that, It also includes a tripping limit part fixedly disposed relative to the first side plate. The tripping limit part cooperates with the cantilever on the main shaft to limit the position of the main shaft when the circuit is tripped.

5. The auxiliary mechanism of the universal circuit breaker operating mechanism according to claim 4, characterized in that, The tripping limit part is fixed between the first side plate and the second side plate.

6. The auxiliary mechanism of the universal circuit breaker operating mechanism according to claim 5, characterized in that, The tripping limit part is cylindrical, with one end riveted to the first side plate and the other end threadedly fastened to the second side plate.

7. The auxiliary mechanism of the universal circuit breaker operating mechanism according to claim 1 or 2, characterized in that, It also includes a cover plate, which is disposed on the side of the first side plate and the second side plate away from the main shaft, for covering the space between the first side plate and the second side plate.

8. The auxiliary mechanism of the universal circuit breaker operating mechanism according to claim 7, characterized in that, The cover plate includes a first end and a second end opposite to each other; Both the first side plate and the second side plate are provided with a latch at the position opposite to the first end. The two latches are arranged side by side. The first end of the cover plate is inserted into the two latches, and the cover plate can rotate relative to the two latches. A first connecting lug extending toward the side of the first side plate is provided on one side of the second end, and a second connecting lug extending toward the side of the second side plate is provided on the other side of the second end. The first connecting lug is threadedly fastened to the first side plate, and the second connecting lug is threadedly fastened to the second side plate.

9. An operating mechanism, characterized in that, Includes spindle, main mechanism and auxiliary mechanism; The main shaft is used to drive the moving contact to realize the closing and opening of the universal circuit breaker; The main mechanism is used to mount the spindle and provide the main power for the spindle to rotate. The auxiliary mechanism is the auxiliary mechanism as described in any one of claims 1 to 8, wherein the auxiliary mechanism and the main mechanism are arranged side by side along the length direction of the main shaft, and the main shaft passes through the first receiving groove and the second receiving groove.

10. The operating mechanism according to claim 9, characterized in that, The number of auxiliary mechanisms is one or two.

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