Opening and closing mechanism and disconnector

Abstract

The application discloses a kind of opening and closing mechanism and isolator, it is related to isolator technical field, opening and closing mechanism includes static contact, moving contact and operating handle.Static contact is equipped with clamping part.Moving contact includes integrally formed connecting section and contact section, connecting section is equipped with spaced-apart rotating shaft hole and fixed hole.Operating handle includes assembly part, assembly part is equipped with accommodating groove and spaced-apart rotating shaft and riveting shaft in the accommodating groove opposite two side walls.Rotating shaft hole is rotatably connected with rotating shaft, fixed hole is fixedly connected with riveting shaft, the distance between the two side walls in accommodating groove is greater than the thickness of connecting section in the direction perpendicular to two side walls.Connecting section and the two side walls of accommodating groove are kept preset interval when operating handle drives moving contact to rotate around rotating shaft and contact section is clamped and fixed in clamping part.The opening and closing mechanism and isolator provided in the application can reduce the risk of operating handle damage caused by overheating of moving contact, and improve the reliability of isolator.

Description

Technical Field

[0001] This application relates to the field of disconnecting switch technology, specifically to a switching mechanism and a disconnecting switch. Background Technology

[0002] A disconnecting switch is a switching device used for isolating power supplies, performing switching operations, and connecting and disconnecting small-current circuits. When the disconnecting switch is in the open position, the moving and stationary contacts in the contact assembly have an insulation distance that meets specified requirements and a clear disconnection mark. When the disconnecting switch is in the closed position, it can carry current under normal circuit conditions and current under abnormal conditions for a specified time.

[0003] In existing disconnect switches, the operating handle has a receiving groove for assembling the moving contact. The moving contact is directly inserted into the receiving groove and fixedly connected by a snap-fit ​​structure so that the operating handle can accurately drive the moving contact to move during opening and closing operations.

[0004] However, when encountering a short-term high current, the moving contact generates a large amount of heat due to the current heating effect. Since the moving contact is in direct contact with the operating handle, the operating handle is prone to thermal deformation or melting and damage, affecting the accuracy of subsequent opening and closing operations and the reliability of the disconnecting switch. Utility Model Content

[0005] The purpose of this application is to provide a switching mechanism and a disconnecting switch that can reduce the risk of damage to the operating handle due to overheating of the moving contact and improve the reliability of the disconnecting switch.

[0006] In a first aspect, embodiments of this application provide a circuit breaker mechanism, including a stationary contact, a moving contact, and an operating handle. The stationary contact is provided with a clamping portion. The moving contact includes an integrally formed connecting section and a contact section, the connecting section having spaced-apart rotating shaft holes and fixing holes. The operating handle includes an assembly portion, the assembly portion having a receiving groove, and a rotating shaft and a riveting shaft spaced apart and passing through opposite side walls of the receiving groove.

[0007] The connecting section is installed in the receiving groove. The rotating shaft hole is rotatably connected to the rotating shaft, and the fixing hole is fixedly connected to the riveting shaft. The distance between the two side walls of the receiving groove is greater than the thickness of the connecting section in the direction perpendicular to the two side walls. When the operating handle drives the moving contact to rotate around the rotating shaft until the contact section is clamped and fixed in the clamping part, the connecting section and the two side walls of the receiving groove maintain a preset distance.

[0008] With the above solution, after the contact section of the moving contact is connected to the clamping part of the stationary contact, the position of the moving contact can be fixed by the clamping part, so that the connecting section of the moving contact can maintain the distance between the moving contact and the two side walls of the receiving groove of the operating handle, avoiding direct contact between the moving contact and the operating handle, thereby preventing the moving contact from directly transferring heat to the operating handle in an overheated state, and reducing the risk of the operating handle being burned.

[0009] Meanwhile, the connecting section is connected to the operating handle via a riveting shaft. This reduces the heat transferred from the moving contact to the operating handle while ensuring synchronous operation of the moving contact and the operating handle. This reduces the risk of thermal deformation of the operating handle and effectively solves the problem of overheating of the moving contact due to short-term high current in the closing state, which can burn out the operating handle and cause the closing mechanism to fail. This improves the reliability of the closing mechanism.

[0010] In some examples, the moving contact is configured as a sheet structure, the receiving groove is configured as a rectangular groove, and the connecting section is adapted to the shape of the rectangular groove.

[0011] With this design, the moving contact is easy to assemble into the receiving slot. The moving contact has the characteristics of small thickness and large surface area. When heat is generated by current, it can dissipate heat more quickly through air convection, reduce its own temperature, and indirectly reduce the total amount of heat transferred to the operating handle, further protecting the handle from high temperature damage.

[0012] In one alternative embodiment, two riveting shafts are provided, which are arranged opposite each other on both sides of the receiving groove. Both riveting shafts pass through the receiving groove and abut against the opposite sides of the connecting section.

[0013] By symmetrically setting two riveting shafts on both sides of the receiving groove, and having the two riveting shafts work together on the connecting section, the connecting section can be clamped in the receiving groove. This helps to reduce the deformation or loss of the connecting section caused by uneven force, and further ensures that the relative position of the connecting section in the receiving groove remains stable during the long-term opening and closing rotation of the moving contact, thereby maintaining the preset gap and ensuring the thermal isolation effect.

[0014] In some examples, guide ramps are provided on both sides of the contact section, which can abut against the clamping part and slide relative to it.

[0015] By setting guide ramps on both sides of the contact section, the fault tolerance and smoothness of the closing action can be improved, reducing jamming and sticking caused by alignment deviations, lowering the driving resistance of the operating handle, and making the opening and closing operations more effortless. Furthermore, the guiding process of the guide ramps and the clamping part ensures a tighter fit between the contact section and the clamping part, guaranteeing that the contact section is stably clamped by the clamping part after closing, avoiding electrical sparks or abnormal overheating caused by poor local contact, and improving the operational safety and reliability of the opening and closing mechanism.

[0016] In some examples, the clamping part includes a first spring and a second spring disposed opposite to each other, with the ends of the first spring and the second spring near the moving contact abutting against each other.

[0017] The use of elastic clamping can adapt to the dimensional tolerance of the contact section. Even if there are slight thickness deviations or uneven surfaces in the contact section, the elastic force of the first and second springs can make them fit tightly against the two sides of the contact section, avoiding the problem of excessive contact resistance due to poor contact, ensuring stable conductivity, and helping to reduce the temperature rise of the moving contact.

[0018] In some examples, the clamping part also includes a clamping spring that passes through the first and second springs, with the first lever arm of the clamping spring abutting the side of the first spring away from the second spring and the second lever arm of the clamping spring abutting the side of the second spring away from the first spring.

[0019] The clamping spring can improve the stability and durability of the clamping force on the clamping part. Even if the first and second springs experience slight elastic decay due to long-term use, the preload of the clamping spring can compensate for the loss of clamping force, prevent the contact section from shifting or making poor contact due to loose clamping, ensure the stability of the conductive circuit, and ensure the stability of the gap between the connecting section and the receiving groove.

[0020] In some examples, the first spring has a first limiting groove on the side opposite to the second spring, and a first lever arm is limited and installed in the first limiting groove. The second spring has a second limiting groove on the side opposite to the first spring, and a second lever arm is limited and installed in the second limiting groove.

[0021] The first and second limiting grooves can further improve the assembly stability of the clamping spring on the first and second spring pieces, prevent the clamping spring from shifting its position under long-term stress or vibration, and ensure that the clamping spring always applies a symmetrical and stable preload to the first and second spring pieces.

[0022] In some examples, the operating handle also includes a connecting hole and a pull rod located on the side of the assembly away from the moving contact. The axial direction of the connecting hole is the same as the axial direction of the rotating shaft. The first end of the pull rod is provided with a first hook and a second hook, which are respectively hooked to the two ends of the connecting hole.

[0023] The connection hole and the pull rod can be used to quickly and detachably connect the pull rod to the operating handle without the need for additional fasteners such as screws and rivets. This simplifies the assembly process and facilitates the replacement of parts during later maintenance.

[0024] In some examples, the inner wall of the receiving cavity is provided with an assembly column, and a rotating connection hole is coaxially provided on the assembly column. An annular boss is provided on the side of the assembly part near the inner wall of the receiving cavity. The annular boss is coaxially provided with the rotating shaft. The inner diameter of the annular boss is adapted to the outer diameter of the assembly column. The rotating shaft is rotatably connected to the rotating connection hole.

[0025] The fitting relationship between the annular boss and the assembly column can help constrain the radial displacement of the operating handle, avoiding the radial wobble that may occur when relying solely on the rotation shaft and the rotation connection hole. This ensures that when the operating handle drives the moving contact to rotate, it always rotates along the preset axis, preventing the operating handle from deviating during rotation and causing direct contact between the operating handle and the moving contact. It also stably maintains the distance between the moving contact and the groove wall, ensuring thermal insulation.

[0026] Secondly, embodiments of this application also provide a disconnecting switch, including a housing and a closing / opening mechanism, wherein the housing has a receiving cavity and the closing / opening mechanism is installed in the receiving cavity.

[0027] The beneficial effects of the disconnecting switch provided in the second aspect and the various possible designs of the second aspect can be found in the first aspect and the various possible implementations of the first aspect, and will not be repeated here. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the internal structure of the disconnecting switch provided in an embodiment of this application.

[0030] Figure 2 An exploded view of the disconnecting switch provided in an embodiment of this application.

[0031] Figure 3 An exploded view of the opening and closing mechanism provided in the embodiments of this application.

[0032] Figure 4 This is a top view of the opening and closing mechanism provided in the embodiments of this application.

[0033] Figure 5 Provided for the embodiments of this application Figure 4 Sectional view at point AA.

[0034] Figure 6 This is a schematic diagram of the closing state of the opening and closing mechanism provided in the embodiments of this application.

[0035] Explanation of reference numerals in the attached drawings: 1. Housing; 11. Receiving cavity; 111. Assembly column; 112. Rotary connecting hole; 2. Stationary contact; 21. Clamping part; 211. First spring; 2111. First limiting groove; 2112. First limiting flange; 2113. First limiting boss; 212. Second spring; 2121. Second limiting groove; 2122. Second limiting flange; 2123. Second limiting boss; 213. Clamping spring; 213 1. First lever arm; 2132. Second lever arm; 2133. Support rod; 3. Moving contact; 31. Connecting section; 311. Rotating shaft hole; 312. Fixing hole; 32. Contact section; 321. Guide slope; 4. Operating handle; 41. Assembly part; 411. Receiving groove; 412. Rotating shaft; 413. Riveting shaft; 414. Annular boss; 42. Connecting hole; 43. Pull rod; 431. First hook; 432. Second hook. Detailed Implementation

[0036] 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, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0038] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0039] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0040] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] Disconnecting switches separate equipment or lines requiring maintenance from the power supply at a clearly visible disconnect point, ensuring the safety of maintenance personnel and equipment. In existing small disconnecting switches, the operating handle used to control the switching on and off is made of plastic. The operating handle and the moving contact are locked together to ensure accurate movement of the moving contact during opening or closing operations.

[0042] However, if a short-term large current is encountered when the circuit is closed, the moving contact will generate a lot of heat under the thermal effect of the current. Since there is a large contact area between the moving contact and the operating handle, the operating handle is prone to thermal deformation or burning damage, which affects the safety of subsequent opening and closing operations and the overall reliability of the disconnecting switch.

[0043] Based on this, the embodiments of this application provide a switching mechanism and a disconnecting switch, which can reduce the risk of damage to the operating handle caused by overheating of the moving contact and improve the reliability of the disconnecting switch.

[0044] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0045] Figure 1 This is a schematic diagram of the internal structure of the disconnecting switch provided in an embodiment of this application. (Refer to...) Figure 1 This embodiment provides a disconnecting switch, including a housing 1 and a closing / opening mechanism. The housing 1 has a receiving cavity 11, and the closing / opening mechanism is installed in the receiving cavity 11.

[0046] The housing 1 serves as the main support for the disconnecting switch, providing fixation and protection for the opening and closing mechanism and other components installed within the receiving cavity 11. The opening and closing mechanism is the primary mechanism in the disconnecting switch used to control the circuit's on / off state. It connects to the incoming and outgoing terminals of the disconnecting switch within the receiving cavity 11, allowing control of the connection and disconnection of the incoming and outgoing terminals.

[0047] The opening and closing mechanism provided in this application embodiment can reduce the risk of overheating damage caused by short-term high current in the closed state, thereby reducing the possibility of disconnecting switch failure and improving the safety and reliability of disconnecting switch use.

[0048] Reference Figures 1 to 5 This embodiment provides a circuit breaker mechanism, including a stationary contact 2, a moving contact 3, and an operating handle 4. The stationary contact 2 is provided with a clamping part 21. The moving contact 3 includes an integrally formed connecting section 31 and a contact section 32. The connecting section 31 is provided with a rotating shaft hole 311 and a fixing hole 312 spaced apart. The operating handle 4 includes an assembly part 41, which is provided with a receiving groove 411, and a rotating shaft 412 and a riveting shaft 413 spaced apart and passing through the opposite side walls of the receiving groove 411.

[0049] The connecting section 31 is installed in the receiving groove 411. The rotating shaft hole 311 is rotatably connected to the rotating shaft 412, and the fixing hole 312 is fixedly connected to the riveting shaft 413. The distance between the two side walls of the receiving groove 411 is greater than the thickness of the connecting section 31 in the direction perpendicular to the two side walls. When the operating handle 4 drives the moving contact 3 to rotate around the rotating shaft 412 until the contact section 32 is clamped and fixed in the clamping part 21, the connecting section 31 and the two side walls of the receiving groove 411 maintain a preset distance.

[0050] With the above solution, after the contact section 32 of the moving contact 3 is connected to the clamping part 21 of the stationary contact 2, the position of the moving contact 3 can be fixed by the clamping part 21, so that the connecting section 31 of the moving contact 3 can maintain the distance between the moving contact 3 and the two side walls of the receiving groove 411 of the operating handle 4, avoiding direct contact between the moving contact 3 and the operating handle 4, thereby preventing the moving contact 3 from directly transferring heat to the operating handle 4 in an overheated state, and reducing the risk of the operating handle 4 being burned.

[0051] Meanwhile, the connecting section 31 is connected to the operating handle 4 via the riveting shaft 413. This reduces the heat transferred from the moving contact 3 to the operating handle 4 while ensuring that the moving contact 3 and the operating handle 4 move synchronously. This reduces the risk of thermal deformation of the operating handle 4 and effectively solves the problem that the moving contact 3 overheats due to short-term high current in the closing state, which in turn burns the operating handle 4 and causes the closing mechanism to fail. This improves the reliability of the closing mechanism.

[0052] Among them, reference Figure 1 The stationary contact 2 is fixedly installed inside the receiving cavity 11, while the moving contact 3 and the operating handle 4 are movably installed inside the receiving cavity 11. The stationary contact 2 can be electrically connected to the incoming terminal of the disconnecting switch, and the moving contact 3 is electrically connected to the outgoing terminal of the disconnecting switch. The operating handle 4 is used to control the moving contact 3. Driving the operating handle 4 synchronously moves the moving contact 3 to contact or move away from the stationary contact 2 to realize the opening and closing of the disconnecting switch.

[0053] Specifically, the stationary contact 2 is provided with a clamping part 21, which can be composed of two opposing clamping arms. The clamping part 21 can clamp the moving contact 3, which can realize the contact and conduction between the stationary contact 2 and the moving contact 3, and also improve the stability of the closing coordination between the stationary contact 2 and the moving contact 3.

[0054] Reference Figure 2 The moving contact 3 includes an integrally formed connecting section 31 and a contact section 32. The connecting section 31 is used to connect with the operating handle 4, so that the operating handle 4 can drive the moving contact 3 to move as a whole. The contact section 32 is used to cooperate with the clamping part 21 of the stationary contact 2. During the closing process, the contact section 32 is inserted into the clamping part 21 to achieve clamping connection.

[0055] The integrally formed connecting section 31 and contact section 32 can ensure the integrity and mechanical strength of the structure while avoiding the connection gap caused by segmented assembly. It can ensure the relative positional accuracy of the connecting section 31 and contact section 32, so that when the operating handle 4 drives the moving contact 3 to rotate, the contact section 32 can always be aligned with the clamping part 21 of the stationary contact 2, avoiding relative offset that causes insertion jamming or alignment deviation. It also eliminates the conductivity fluctuation caused by the connection gap, prevents abnormal local heating when current passes through, and helps to reduce the impact of the overheating of the moving contact 3 on the structural stability of the operating handle 4.

[0056] Furthermore, referring to Figure 2 The connecting section 31 is provided with a rotating hole and a fixing hole 312 spaced apart. The rotating hole is located at the end of the connecting section 31 away from the contact section 32, and the fixing hole 312 is located at the end of the connecting section 31 close to the contact section 32.

[0057] The assembly part 41 of the operating handle 4 is located inside the receiving cavity 11 of the housing 1. A receiving groove 411 is provided on the side of the assembly part 41 near the moving contact 3. A rotating shaft 412 and a riveting shaft 413 are also spaced apart on the assembly part 41. The rotating shaft 412 and the riveting shaft 413 pass through the receiving groove 411 in a direction perpendicular to the opposite side walls of the receiving groove 411. Both ends of the rotating shaft 412 extend to be rotatably connected to the housing 1. When the operating handle 4 is driven, it always rotates around the rotating shaft 412 as its axis. The riveting shaft 413 is fixedly inserted into the receiving groove 411 by riveting.

[0058] During the assembly process, the connecting section 31 is first inserted into the receiving groove 411, so that the rotating hole corresponds to the hole on the assembly part 41 where the rotating shaft 412 is installed, and the riveting hole corresponds to the hole on the assembly part 41 where the riveting shaft 413 is installed. Then, the rotating shaft 412 and the riveting shaft 413 are inserted accordingly, thereby realizing the assembly of the operating handle 4 and the connecting section 31 of the moving contact 3. During the driven rotation process, the operating handle 4 can drive the moving contact 3 to rotate around the rotating shaft 412 through the riveting shaft 413, so that the contact part of the moving contact 3 can be inserted into or withdrawn from the clamping part 21 during the rotation process.

[0059] Reference Figures 3 to 5The distance between the opposite side walls of the receiving groove 411 is set to be greater than the thickness of the connecting section 31 in that direction, so that the connecting section 31 has room to move within the receiving groove 411. The clamping position of the clamping part 21 is set to be on the same plane as the centerline of the receiving groove 411. The centerline of the receiving groove 411 is the symmetrical centerline of the receiving groove 411 in the direction of the distance between the opposite side walls, that is, a virtual straight line that maintains an equal distance from the side walls along the direction of their relative distribution. This centerline serves as the reference positioning line for the connecting section 31. When the contact section 32 is clamped and fixed by the clamping part 21, under the constraint of the clamping force, the connecting section 31 naturally coincides with this centerline, ensuring that the gap dimensions between its two sides and the walls of the receiving groove 411 are consistent.

[0060] This structural design, through geometric positioning, cuts off the direct contact path between the moving contact 3 and the operating handle 4 in terms of spatial layout. When the moving contact 3 generates heat through current, it can only transfer heat through limited contact points such as the rotating shaft 412 and the fixed shaft, which greatly reduces the heat conduction efficiency and effectively protects the operating handle 4 from high temperature damage, thereby ensuring the long-term stable operation of the opening and closing mechanism.

[0061] Reference Figures 2 to 3 In some examples, the moving contact 3 is configured as a sheet structure, the receiving groove 411 is configured as a rectangular groove, and the connecting section 31 is adapted to the shape of the rectangular groove.

[0062] With this design, the moving contact 3 is easy to assemble into the receiving groove 411. The moving contact 3 has the characteristics of small thickness and large surface area. When heat is generated by current, it can dissipate heat more quickly through air convection, reduce its own temperature, indirectly reduce the total amount of heat transferred to the operating handle 4, and further protect the handle from high temperature damage.

[0063] The moving contact 3 is configured as a sheet-like structure, with an overall flat, thin plate shape. Both the connecting section 31 and the contact section 32 maintain the same sheet-like characteristics. Correspondingly, the receiving groove 411 of the operating handle 4 is configured as a rectangular groove, the cross-sectional profile of which matches the shape of the sheet-like connecting section 31. Specifically, the length direction of the rectangular groove is consistent with the length extension direction of the connecting section 31, and the width direction (i.e., the distance direction relative to the two side walls) corresponds to the width direction of the connecting section 31.

[0064] Furthermore, the fit between the sheet-like connecting section 31 and the rectangular groove can effectively constrain the offset or torsion of the connecting section 31 in the direction other than the thickness direction, ensuring that when the operating handle 4 drives the moving contact 3 to rotate, the connecting section 31 always moves within the preset trajectory, avoiding the alignment deviation between the contact section 32 and the clamping part 21 of the stationary contact 2 caused by shaking, and improving the accuracy of the opening and closing action.

[0065] Furthermore, since the connecting section 31 is adapted to the shape of the rectangular groove, and their outlines correspond in the length and width directions, the gap size between the two sides of the connecting section 31 and the groove wall can be kept consistent when the connecting section 31 is centered in the receiving groove 411. This avoids the gap on one side being too small or even contacting due to shape mismatch, thereby stably maintaining the thermal isolation state between the moving contact 3 and the operating handle 4, and ensuring that high temperature is not transferred to the handle through local contact.

[0066] In one alternative embodiment, two riveting shafts 413 are provided (not shown in the figure). The two riveting shafts 413 are arranged opposite to each other on both sides of the receiving groove 411. Both riveting shafts 413 pass through the receiving groove 411 and abut against the opposite sides of the connecting section 31 respectively.

[0067] By symmetrically arranging two riveting shafts 413 on both sides of the receiving groove 411, and having the two riveting shafts 413 work together on the connecting section 31, the connecting section 31 can be clamped in the receiving groove 411. This helps to reduce the deformation or loss of the connecting section 31 caused by uneven force, and further ensures that the relative position of the connecting section 31 in the receiving groove 411 remains stable during the long-term opening and closing rotation of the moving contact 3, thereby maintaining the preset gap and ensuring the thermal isolation effect.

[0068] Specifically, the two riveting shafts 413 are arranged symmetrically, with their center lines collinear and extending in a direction perpendicular to the opposite side walls of the receiving groove 411. During assembly, both riveting shafts 413 are inserted into the receiving groove 411 along their own center lines. One riveting shaft 413 enters the receiving groove 411 from one side wall of the assembly part 41, and the other riveting shaft 413 enters the receiving groove 411 from the other side wall of the assembly part 41. Finally, the inner ends of the two riveting shafts 413 are tightly abutted against the two sides of the connecting section 31 of the moving contact 3 in the thickness direction. The outer ends of the two riveting shafts 413 are pressed and fixed by the riveting process, so that the connecting section 31 is stably clamped between the two riveting shafts 413, thereby realizing the fixed connection between the moving contact 3 and the operating handle 4.

[0069] The collinear arrangement of the two riveting shafts 413 can accurately position the connecting section 31 in the receiving groove 411, help ensure the overlap of the connecting section 31 with the center line of the receiving groove 411, and further ensure that when the contact section 32 is clamped by the stationary contact 2, the connecting section 31 will not shift to directly contact the operating handle 4.

[0070] It should be noted that the contact area between the riveting shaft 413 and the connecting section 31 is small, which means that the heat conduction area between the moving contact 3 and the operating handle 4 is small. Even if the moving contact 3 generates a large amount of heat due to the passage of a large current for a short time, only a small amount of heat can be transferred to the operating handle 4 through the small contact area of ​​the two riveting shafts 413, further reducing the risk of the operating handle 4 being damaged by heat.

[0071] Reference Figure 3 In some examples, guide ramps 321 are provided on both sides of the contact section 32, and the guide ramps 321 can abut against the clamping part 21 and slide relative to it.

[0072] By providing guide ramps 321 on both sides of the contact section 32, the fault tolerance and smoothness of the closing action can be improved, reducing jamming and sticking caused by alignment deviation, lowering the driving resistance of the operating handle 4, and making the opening and closing operations more effortless. Furthermore, the guiding process of the guide ramps 321 and the clamping part 21 ensures a tighter fit between the contact section 32 and the clamping part 21, guaranteeing that the contact section 32 is stably clamped by the clamping part 21 after closing, avoiding electrical sparks or abnormal heating caused by poor local contact, and improving the operational safety and reliability of the opening and closing mechanism.

[0073] Specifically, guide slopes 321 are symmetrically provided on both sides of the contact section 32 of the moving contact 3 near the end of the clamping part 21 of the stationary contact 2. The guide slopes 321 extend along the length of the contact section 32, the thickness of the end of the contact section 32 is less than the thickness of the side near the connecting section 31, and the inclination angles of the two guide slopes 321 are consistent, ensuring that both sides of the contact section 32 can maintain the same guiding fit with the clamping part 21.

[0074] When the operating handle 4 rotates the moving contact 3 to the closed position, the contact section 32 gradually approaches the clamping part 21 of the stationary contact 2. At this time, the two guide slopes 321 will contact the inner side of the clamping part 21 before the main body of the contact section 32. Due to the inclined characteristics of the guide slopes 321, the relative movement between the contact section 32 and the clamping part 21 will be converted into sliding along the direction of the guide slopes 321. Even if there is a slight misalignment between the contact section 32 and the clamping part 21, it can be self-corrected by the sliding of the guide slopes 321, ensuring that the contact section 32 is aligned with the center position of the clamping part 21 and can be smoothly inserted.

[0075] Reference Figure 3 and Figure 6 In some examples, the clamping part 21 includes a first spring 211 and a second spring 212 disposed opposite to each other, with the ends of the first spring 211 and the second spring 212 near the moving contact 3 abutting against each other.

[0076] The use of elastic clamping can adapt to the dimensional tolerance of the contact section 32. Even if there is a slight thickness deviation or surface unevenness in the contact section 32, the elastic force of the first spring 211 and the second spring 212 can make them fit tightly against the two sides of the contact section 32, avoiding the problem of excessive contact resistance due to poor contact, ensuring stable conductivity, and helping to reduce the temperature rise of the moving contact 3.

[0077] Specifically, refer to Figure 3 and Figure 6 The first spring piece 211 and the second spring piece 212 are spaced apart at their ends away from the contact section 32, while their ends closer to the contact section 32 abut against each other, forming a triangular clamping structure. Under the action of their own elastic force, the abutting ends of the first spring piece 211 and the second spring piece 212 have clamping ability, which can clamp the contact section 32 inserted between the first spring piece 211 and the second spring piece 212. The first spring piece 211 and the second spring piece 212 can be made of a metal material with good conductivity and elasticity (such as phosphor bronze or beryllium copper alloy).

[0078] The triangular clamping structure, combined with the elastic deformation capabilities of the first spring 211 and the second spring 212, can absorb the impact energy during the opening and closing process, reducing the rigid collision between the contact section 32 and the clamping part 21, and lowering the wear of the contact part. Simultaneously, in the open state, the ends of the first spring 211 and the second spring 212 closest to the contact section 32 abut against each other, effectively preventing impurities from entering the clamping part 21, thus protecting the surface of the clamping part 21 that contacts the contact section 32 from contamination. Furthermore, compared to a rigid clamping structure, the symmetrical design of the first spring 211 and the second spring 212 facilitates the insertion and removal of the contact section 32, and, in conjunction with the guide slope 321 of the contact section 32, further improves the smoothness and reliability of the opening and closing operation.

[0079] During the closing process, when the contact section 32 of the moving contact 3 rotates to the closing position under the action of the operating handle 4, the guide slopes 321 on both sides of the contact section 32 first contact the first spring piece 211 and the second spring piece 212 respectively. As the contact section 32 continues to be inserted, the ends of the first spring piece 211 and the second spring piece 212 near the contact section 32 are pushed by the contact section 32 and elastically open to both sides and accumulate elastic potential energy. When the contact section 32 is fully inserted into the clamping part 21, the ends of the first spring piece 211 and the second spring piece 212 near the contact section 32 are tightly attached to the two sides of the contact section 32 under the action of elastic restoring force, forming a stable clamping and fixing, ensuring that the moving contact 3 is in the center line position of the receiving groove 411.

[0080] Reference Figure 3 and Figure 6 In some examples, the clamping part 21 also includes a clamping spring 213, which passes through the first spring 211 and the second spring 212. The first lever arm 2131 of the clamping spring 213 abuts against the side of the first spring 211 away from the second spring 212, and the second lever arm 2132 of the clamping spring 213 abuts against the side of the second spring 212 away from the first spring 211.

[0081] The clamping spring 213 can improve the stability and durability of the clamping force on the clamping part 21. Even if the first spring 211 and the second spring 212 experience slight elastic decay due to long-term use, the preload of the clamping spring 213 can compensate for the loss of clamping force, prevent the contact section 32 from shifting or making poor contact due to loose clamping, ensure the stability of the conductive circuit, and ensure the stability of the mating gap between the connecting section 31 and the receiving groove 411.

[0082] Specifically, refer to Figure 3 and Figure 6 The clamping spring 213 has a triangular structure, including a support rod 2133 and a first lever arm 2131 and a second lever arm 2132 located at both ends of the support rod 2133. The ends of the first lever arm 2131 and the second lever arm 2132 away from the support rod 2133 abut against each other, forming a clamping effect similar to the cooperation between the first spring piece 211 and the second spring piece 212 under their own elastic force. The support rod 2133 passes through the end of the first spring piece 211 and the second spring piece 212 away from the connecting section 31. The first lever arm 2131 abuts against the outer surface of the first spring piece 211 away from the second spring piece 212, and the second lever arm 2132 abuts against the outer surface of the second spring piece 212 away from the first spring piece 211.

[0083] In its natural state, the elastic force of the clamping spring 213 applies opposing preloads to the first spring piece 211 via the first lever arm 2131 and to the second spring piece 212 via the second lever arm 2132, further enhancing the clamping force between the first spring piece 211 and the second spring piece 212. When the contact section 32 is inserted into the clamping part 21 and pushes the first spring piece 211 and the second spring piece 212 to open to both sides, the first spring piece 211 and the second spring piece 212 will generate a reverse spreading force on the first lever arm 2131 and the second lever arm 2132 of the clamping spring 213, causing the clamping spring 213 to undergo elastic deformation and accumulate additional elastic potential energy. This elastic potential energy is converted into a clamping force on the first spring piece 211 and the second spring piece 212 through the first lever arm 2131 and the second lever arm 2132. This force is superimposed with the elastic restoring force of the first spring piece 211 and the second spring piece 212 themselves and acts together on the contact section 32, further improving the clamping and fixing ability of the clamping part 21 to the moving contact 3, and ensuring that the connecting section 31 of the moving contact 3 will not shift to the side wall of the receiving groove 411 in the receiving groove 411.

[0084] The clamping spring 213 is designed with a symmetrical structure to match the symmetrical design of the first spring 211 and the second spring 212. This can prevent the clamping force direction of the spring from shifting due to excessive force on one side, thereby ensuring that the contact section 32 is tightly fitted with the contact surfaces of the first spring 211 and the second spring 212, reducing contact resistance and preventing local abnormal heating.

[0085] Meanwhile, the clamping spring 213 can share the deformation stress borne by the first spring 211 and the second spring 212, reducing fatigue damage caused by repeated opening and closing of the first spring 211 and the second spring 212, and slowing down the aging rate of the first spring 211 and the second spring 212. In addition, with the adjustable elastic deformation of the clamping spring 213, the clamping part 21 can adapt to the thickness tolerance of the contact section 32 within a certain range, without the need to strictly control the machining accuracy of the contact section 32, thus reducing production difficulty and cost.

[0086] Reference Figure 3 and Figure 6 In some examples, the first spring 211 has a first limiting groove 2111 on the side opposite to the second spring 212, and the first lever arm 2131 is limited and installed in the first limiting groove 2111. The second spring 212 has a second limiting groove 2121 on the side opposite to the first spring 211, and the second lever arm 2132 is limited and installed in the second limiting groove 2121.

[0087] The setting of the first limiting groove 2111 and the second limiting groove 2121 can further improve the assembly stability of the clamping spring 213 on the first spring 211 and the second spring 212, avoid the clamping spring 213 from shifting position under long-term stress or vibration environment, and ensure that the clamping spring 213 always applies symmetrical and stable preload to the first spring 211 and the second spring 212.

[0088] Specifically, refer to Figure 3 and Figure 6 The first limiting groove 2111 is located on the side of the first spring 211 away from the second spring 212, corresponding to the position of the first lever arm 2131 of the clamping spring 213. The second limiting groove 2121 is located on the side of the second spring 212 away from the first spring 211, corresponding to the position of the second lever arm 2132 of the clamping spring 213. Furthermore, the shape of the first limiting groove 2111 matches the shape of the first lever arm 2131, and the shape of the second limiting groove 2121 matches the shape of the second lever arm 2132. This can effectively constrain the deflection of the clamping spring 213, preventing the clamping spring 213 from loosening or shifting due to vibrations during opening and closing, deformation of the first spring 211 and the second spring 212, or long-term use. This ensures that the clamping spring 213 always applies a symmetrical and stable preload to the first spring 211 and the second spring 212.

[0089] In addition, the first limiting groove 2111 and the second limiting groove 2121 can be used as positioning references during assembly, so that the clamping spring 213 can be installed quickly and accurately, avoiding positional deviations during manual assembly.

[0090] Reference Figure 3 and Figure 6The first spring piece 211, on the side opposite to the second spring piece 212, is also provided with a first limiting flange 2112 and a first limiting boss 2113. The first limiting flange 2112 and the first limiting boss 2113 are located on both sides of the first lever arm 2131, which can further help limit the position of the first lever arm 2131 on the first spring piece 211. Similarly, the second spring piece 212, on the side opposite to the first spring piece 211, is also provided with a second limiting flange 2122 and a second limiting boss 2123. The second limiting flange 2122 and the second limiting boss 2123 are located on both sides of the second lever arm 2132, which can further help limit the position of the second lever arm 2132 on the second spring piece 212.

[0091] Reference Figures 1 to 3 In some examples, the operating handle 4 also includes a connecting hole 42 and a pull rod 43 located on the side of the assembly part 41 away from the moving contact 3. The axial direction of the connecting hole 42 is the same as the axial direction of the rotating shaft 412. The first end of the pull rod 43 is provided with a first hook 431 and a second hook 432, which are respectively hooked to the two ends of the connecting hole 42.

[0092] The connection hole 42 and the pull rod 43 can be used to achieve a quick and detachable connection between the pull rod 43 and the operating handle 4, without the need for additional fasteners such as screws and rivets, thus simplifying the assembly process.

[0093] Among them, reference Figures 1 to 3 The connecting hole 42 is located on the side of the assembly part 41 away from the moving contact 3, and the axial direction of the connecting hole 42 is the same as the axial direction of the rotating shaft 412. The connecting hole 42 is a through hole. The pull rod 43 is U-shaped, and the open end of the U-shaped pull rod 43 is the first end of the pull rod 43. The two opposing lever arms of the first end are respectively provided with a first hook 431 and a second hook 432. The two hooks are symmetrically distributed and both bend inward towards the pull rod 43. The first hook 431 and the second hook 432 can be hooked onto the openings on the opposite sides of the connecting hole 42.

[0094] During assembly, first pull the two lever arms of the U-shaped pull rod 43 away from each other, then insert the first hook 431 and the second hook 432 into the two ends of the connecting hole 42 respectively. The slight elastic deformation of the material of the pull rod 43 allows the hooks to be smoothly hooked into the connecting hole 42. After assembly, the pull rod 43 can rotate flexibly around the axis of the connecting hole 42.

[0095] Reference Figures 1 to 3In some examples, the inner wall of the receiving cavity 11 is provided with an assembly column 111, and a rotating connection hole 112 is coaxially provided on the assembly column 111. The assembly part 41 is provided with an annular boss 414 on the side near the inner wall of the receiving cavity 11. The annular boss 414 is coaxially provided with the rotating shaft 412. The inner diameter of the annular boss 414 is adapted to the outer diameter of the assembly column 111. The rotating shaft 412 is rotatably connected to the rotating connection hole 112.

[0096] The fitting relationship between the annular boss 414 and the mounting column 111 can help constrain the radial displacement of the operating handle 4, avoid the radial wobbling that may occur when relying solely on the cooperation between the rotating shaft 412 and the rotating connection hole 112, ensure that when the operating handle 4 drives the moving contact 3 to rotate, it always rotates along the preset axis, prevents the operating handle 4 from deviating during rotation and causing direct contact between the operating handle 4 and the moving contact 3, stably maintains the distance between the moving contact 3 and the side wall of the receiving groove 411, and ensures the thermal insulation effect.

[0097] A cylindrical mounting post 111 is integrally formed on the inner wall of the receiving cavity 11. The axis of the mounting post 111 coincides with the axis of the rotating shaft 412 on the operating handle 4. A rotating connection hole 112 is provided at the axial center of the mounting post 111 to achieve a rotating connection with the rotating shaft 412 on the operating handle 4.

[0098] Correspondingly, refer to Figures 1 to 3 An annular boss 414 is integrally formed on the side of the assembly part 41 of the operating handle 4 near the inner wall of the receiving cavity 11. The axis of the annular boss 414 is collinear with the axis of the rotating shaft 412, ensuring that the rotation reference of the two is consistent. The inner diameter of the annular boss 414 is in clearance fit with the outer diameter of the assembly column 111, which satisfies the assembly requirements of the annular boss 414 fitting the assembly column 111 and limits excessive offset in the radial direction.

[0099] During assembly, the end of the rotating shaft 412 is inserted into the rotating connection hole 112 of the assembly column 111 to form a rotating fit. At the same time, the annular boss 414 is simultaneously fitted onto the outer circumference of the assembly column 111, so that the outer wall of the assembly column 111 fits against the inner wall of the annular boss 414, forming a double rotating connection structure, which further enhances the rotational stability of the operating handle 4 within the housing 1.

[0100] Since the operating handle 4 will bear radial force when it is driven, the annular boss 414 can share the radial load on the rotating shaft 412, avoid the rotating shaft 412 from bending and deforming due to long-term stress, and at the same time reduce local wear on the inner wall of the rotating connection hole 112, and extend the service life of the assembly column 111 and the rotating shaft 412.

[0101] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A switching mechanism, characterized in that, include: The stationary contact is equipped with a clamping part; The moving contact includes an integrally formed connecting section and a contact section, wherein the connecting section is provided with spaced-apart rotating shaft holes and fixing holes; The operating handle includes an assembly part, the assembly part having a receiving groove, and a rotating shaft and a riveting shaft passing through the opposite side walls of the receiving groove at intervals. The connecting section is installed in the receiving groove, the rotating shaft hole is rotatably connected to the rotating shaft, the fixing hole is fixedly connected to the riveting shaft, and the distance between the two side walls in the receiving groove is greater than the thickness of the connecting section in the direction perpendicular to the two side walls. When the operating handle drives the moving contact to rotate around the rotating shaft until the contact section is clamped and fixed in the clamping part, the connecting section maintains a preset distance from the two side walls of the receiving groove.

2. The opening and closing mechanism according to claim 1, characterized in that, The moving contact is configured as a sheet structure, the receiving groove is configured as a rectangular groove, and the connecting section is adapted to the shape of the rectangular groove.

3. The opening and closing mechanism according to claim 1 or 2, characterized in that, Both sides of the contact section are provided with guide slopes, which can abut against the clamping part and slide relative to it.

4. The opening and closing mechanism according to claim 1 or 2, characterized in that, The clamping part includes a first spring and a second spring disposed opposite to each other, with the ends of the first spring and the second spring near the moving contact abutting against each other.

5. The opening and closing mechanism according to claim 4, characterized in that, The clamping part further includes a clamping spring, which passes through the first spring and the second spring, and the first lever arm of the clamping spring abuts against the side of the first spring away from the second spring, and the second lever arm of the clamping spring abuts against the side of the second spring away from the first spring.

6. The opening and closing mechanism according to claim 5, characterized in that, The first spring sheet has a first limiting groove on the side opposite to the second spring sheet, and the first lever arm is limited and installed in the first limiting groove; the second spring sheet has a second limiting groove on the side opposite to the first spring sheet, and the second lever arm is limited and installed in the second limiting groove.

7. The opening and closing mechanism according to claim 1, characterized in that, The riveting shaft is provided in two parts, which are arranged opposite each other on both sides of the receiving groove. Both riveting shafts pass through the receiving groove and abut against the opposite sides of the connecting section.

8. The opening and closing mechanism according to claim 1, characterized in that, The operating handle also includes a connecting hole and a pull rod located on the side of the assembly part away from the moving contact. The axial direction of the connecting hole is the same as the axial direction of the rotating shaft hole. The first end of the pull rod is provided with a first hook and a second hook, which are respectively hooked to the two ends of the connecting hole.

9. A disconnecting switch, characterized in that, The device includes a housing and a closing / opening mechanism as described in any one of claims 1-8, wherein the housing has a receiving cavity and the closing / opening mechanism is installed within the receiving cavity.

10. The disconnecting switch according to claim 9, characterized in that, The inner wall of the receiving cavity is provided with an assembly column, and a rotating connection hole is coaxially provided on the assembly column. An annular boss is provided on the side of the assembly part near the inner wall of the receiving cavity. The annular boss is coaxially provided with the rotating shaft. The inner diameter of the annular boss is adapted to the outer diameter of the assembly column. The rotating shaft is rotatably connected to the rotating connection hole.

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