Three-section operating mechanism and dual-power change-over switch

Abstract

A three-section operating mechanism disclosed by the present invention comprises a first mounting plate, a second mounting plate, a common energy storage assembly, a standby energy storage assembly, a first coil, a second coil and a lever assembly, the first mounting plate and the second mounting plate are symmetrically arranged, and the common energy storage assembly and the standby energy storage assembly are movably connected. The other end of the common energy storage assembly and the other end of the standby energy storage assembly are both in linkage with the lever assembly, the first coil and the second coil. The double-separating mechanism is located between the first coil and the second coil, and three-position switching is achieved through the double-separating mechanism; compared with the prior art, the mechanism is simple in structure and high in conversion speed, and the central connecting rod and the rotating shaft connecting rod form an acute angle after closing, so that the mechanism cannot be separated due to external force, and the mechanism is in a stable state after closing.

Description

Technical Field

[0001] The invention relates to the technical field of low-voltage electrical appliances, and in particular to a three-stage operating mechanism and a dual-power supply conversion switch. Background Art

[0002] Chinese patent CN105428109AU discloses an operating mechanism for a two-position automatic transfer switch, which has the following problems: 1. When closing the switch, the connecting rod on the closing side swings at a large angle, and the impact is large when the dead point is in place, causing serious contact bounce. When the switch is connected under load, the contact is severely burned, resulting in a decrease in the electrical life of the switch; 2. When opening the switch, there is an idle stroke when the component drives the connecting rod to move and then drives the square shaft to move. In this process, the final contact pressure decreases and the temperature increases, affecting the breaking performance of the switch; when opening the switch, if the first-moving mechanism on the opposite side of the closing switch is at risk of getting stuck.

[0003] 3. The dual-structure design has complicated parts and is not modularized; 4. The double-break module coil requires a large pulling force and the coil assembly cost is high: because its pair of lever assemblies are set with a double-break position, the coil is required to drive the three-stage module to pull the closing side lever assembly to the double-break position when the switch is closed. This is equivalent to the coil force directly pulling the main tension spring on one side at this time, so the required opening coil force is relatively large.

[0004] Chinese patent CN214848453U discloses an operating mechanism of an automatic transfer switch electrical appliance, which has the following problems: 1. The standing closing and opening mechanisms share a set of elastic elements. Therefore, the deformation of the elastic elements will be large during the conversion process, which places high demands on the elastic elements, makes them prone to fatigue, and reduces the mechanical life of the entire mechanism.

[0005] In practical applications, there are many automatic transfer switch appliances that need to connect the load to the normal and standby power supplies in a man-free manner. After the two conversion operations are completed, they correspond to the two positions of the operating mechanism. In view of the above problems and requirements, it is necessary to study a new operating mechanism of a two-position automatic transfer switch to realize this conversion process, and the service life is long and the mechanism operates stably.

[0006] Therefore, the present invention needs to provide a modular design that is very convenient to install and disassemble. The switch opening is limited by the angle of the double-opening mechanism so that it can stay in the double-opening position. When the opening coil is actuated, it directly acts on the half-axis to control its rotation to adjust the angle. Therefore, the opening action can be completed with less power, and the overall volume is smaller and the cost is lower. Summary of the invention

[0007] The object of the present invention is to provide a three-stage operating mechanism and a dual power supply conversion switch, so as to solve the above-mentioned problems existing in the prior art.

[0008] In order to achieve the above object, the technical solution adopted by the present invention is as follows: A three-stage operating mechanism, comprising a first mounting plate, a second mounting plate, a common energy storage component, a backup energy storage component, a first coil, a second coil and a lever component, wherein the first mounting plate and the second mounting plate are symmetrically arranged, a receiving cavity is reserved between the first mounting plate and the second mounting plate, the common energy storage component is mounted at one end of the receiving cavity, the backup energy storage component is mounted at the other end of the receiving cavity, the first coil is located at the lower end of the common energy storage component, the second coil is located at the lower end of the backup energy storage component, the common energy storage component and the backup energy storage component are movably connected, and the other ends of the common energy storage component and the backup energy storage component are linked with the lever component, the first coil and the second coil; It also includes a double-division mechanism, which is located between the first coil and the second coil. The double-division mechanism 8 plays a role of giving way and limiting the linkage mechanism 9, and the double-division mechanism 8 realizes three-position conversion.

[0009] Further, the double-split mechanism comprises: a base, a first half-shaft and a second half-shaft, the base having a receiving cavity, the first half-shaft being mounted on one side of the upper end of the base, the second half-shaft being mounted on the other side of the upper end of the base, the first half-shaft being sleeved with a first elastic member, and the second half-shaft being sleeved with a second elastic member; It also includes a bracket, which is located in the accommodating cavity of the base, and the lower end of the bracket is provided with a coil frame, the lower end of the coil frame is provided with a static iron core, the upper end of the bracket is provided with a moving iron core, and the upper end of the moving iron core is also provided with a toggle rod, and the two sides of the toggle rod are respectively provided with a first synchronous component and a second synchronous component, one end of the first synchronous component is clamped on the first half-shaft, and the other end of the first synchronous component is located at the lower end of one side of the toggle rod, one end of the second synchronous component is clamped on the second half-shaft, and the other end of the first synchronous component is located at the lower end of the other side of the toggle rod.

[0010] Furthermore, grooves are provided at the upper ends of the two side plates of the base along the length direction, and the grooves are used to install the first half-shaft and the second half-shaft.

[0011] Furthermore, a first convex point is provided at the lower end of the first synchronous member, and a second convex point is provided at the lower end of the second synchronous member. The first convex point is inserted into the straight arm of the first elastic member, and the second convex point is inserted into the straight arm of the second elastic member.

[0012] Furthermore, a pair of first hooks and a pair of second hooks are provided on the two side plates along the width direction of the base, the first hooks are used to fix one end of the first elastic member away from the straight arm of the first elastic member, and the second hooks are used to fix one end of the second elastic member away from the straight arm of the first elastic member.

[0013] Furthermore, threaded holes are provided on both side panels of the base along the length direction, and the base is installed between the first installation plate and the second installation plate through the threaded holes.

[0014] Further, the linkage assembly includes a first rotating shaft link and a second rotating shaft link, the first rotating shaft link and the second rotating shaft link are symmetrically arranged and connected by a square shaft, the lower ends of the first rotating shaft link and the second rotating shaft link are respectively located on both sides of the toggle rod, the upper ends of the first link and the second link are respectively provided with a first sliding link and a second sliding link, the ends of the first sliding link and the second sliding link close to the first link and the second link are connected to the first link and the second link by sliding, and the upper ends of the first sliding link and the second sliding link are connected to the lever assembly.

[0015] Furthermore, waist-shaped sliding grooves are provided on the first rotating shaft connecting rod and the second rotating shaft connecting rod.

[0016] Furthermore, two recesses are provided on the upper end surfaces of the first half-shaft and the second half-shaft corresponding to the positions of the first rotating shaft connecting rod and the second rotating shaft connecting rod, and one end of the first rotating shaft connecting rod and the second rotating shaft connecting rod close to the recess is arranged to be an arc surface, so that the first rotating shaft connecting rod and the second rotating shaft connecting rod are oriented and limited on the recess.

[0017] Furthermore, the moving iron core includes a first part and a second part, the lower end of the first part is connected to the upper end of the second part, and the diameter of the second part is larger than the diameter of the second part.

[0018] The present invention also provides a dual power supply conversion switch, comprising the above-mentioned three-stage operating mechanism.

[0019] The beneficial effects of the present invention are: The present invention sets a double-opening mechanism to limit the opening of the switch so that it can stay in the double-opening position. When the opening coil is actuated, it directly acts on the half-axis to control its rotation to adjust the angle. Therefore, the opening action can be completed with less power, and the overall volume is smaller and the cost is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the structure of the first mounting plate and the second mounting plate of the present invention; Figure 2 It is a schematic diagram of the structure of the commonly used energy storage components and the backup energy storage components of the present invention; Figure 3 It is a structural schematic diagram of the three-stage operating mechanism of the present invention; Figure 4 It is a structural schematic diagram of the lever assembly of the present invention; Figure 5 It is a structural schematic diagram of the double-branch mechanism of the present invention; Figure 6 It is an exploded view of the double-branch mechanism of the present invention; Figure 7 It is a structural schematic diagram of the linkage mechanism of the present invention; Figure 8 It is a schematic diagram of the standby closing position of the present invention; Fig. 9 It is a schematic diagram of energy storage into a common closing lever assembly according to the present invention; Fig.10 It is a schematic diagram of the preliminary movement of the connecting rod part of the mechanism driven by the energy storage of the elastic member of the present invention; Fig.11 It is a schematic diagram of the double-point position of the present invention; Fig.12 This is a schematic diagram of the closing action of the opening coil of the present invention; Fig.13 It is a schematic diagram of the present invention switching from the double split position to the common action; Fig.14 It is a schematic diagram of the commonly used closing position of the present invention.

[0021] Reference numerals: First mounting plate 1, second mounting plate 2, common energy storage assembly 3, spare energy storage assembly 4, first coil 5, second coil 6, lever assembly 7, double-branch mechanism 8, linkage mechanism 9, square shaft 10; Base 8-1, first semi-axis 8-2, second semi-axis 8-3, first elastic member 8-4, second elastic member 8-5, bracket 8-6, coil skeleton 8-7, static iron core 8-8, moving iron core 8-9, toggle lever 8-10, mounting hole 8-11, first synchronous member 8-12, second synchronous member 8-13, first convex point 8-14, second convex point 8-15, yielding surface 8-16, groove 8-17, first hook 8-18, second hook 8-19; threaded hole 8-20; The first rotating shaft connecting rod 9-1, the second rotating shaft connecting rod 9-2, the first sliding connecting rod 9-3, the second sliding connecting rod 9-4, and the waist-shaped sliding groove 9-5. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not used to limit the present invention.

[0023] Among them, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention or simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0025] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0026] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0027] like Figures 1 to 7 As shown, a three-stage operating mechanism includes a first mounting plate 1, a second mounting plate 2, a common energy storage component 3, a backup energy storage component 4, a first coil 5, a second coil 6 and a lever assembly 7, wherein the first mounting plate 1 and the second mounting plate 2 have the same structure and are equal in size, and the first mounting plate 1 and the second mounting plate 2 are symmetrically arranged, a receiving cavity is reserved between the first mounting plate 1 and the second mounting plate 2, the common energy storage component 3 is installed at one end of the receiving cavity, and the backup energy storage component 4 is installed at the other end of the receiving cavity, the first coil 5 is located at the lower end of the common energy storage component 3, and the second coil 6 is located at the lower end of the backup energy storage component 4, the common energy storage component 3 and the backup energy storage component 4 are movably connected, and the other ends of the common energy storage component 3 and the backup energy storage component 4 are linked by the lever assembly, the first coil 5 and the second coil 6; It also includes a double-division mechanism 8, which is detachably located between the first coil 5 and the second coil 6; The double-split mechanism 8 plays the role of giving way and limiting the linkage mechanism 9, and the double-split mechanism 8 realizes three-position conversion.

[0028] It can be seen from the above method that the double-opening mechanism 8 is provided to limit the opening of the switch so that it can stay in the double-opening position. When the opening coil is actuated, it directly acts on the half-shaft to control its rotation to adjust the angle. Therefore, the opening action can be completed with less power, and the overall volume is smaller and the cost is lower. Through design calculations, during the closing process, at the moment when the moving contact and the static contact touch each other (the closing has not been completed at this time), the mechanism can provide a force value sufficient to overcome the total contact final pressure of 120N. As the closing state is gradually completed, the force value provided by the mechanism gradually increases, and after closing, the center connecting rod and the rotating shaft connecting rod reach an acute angle, so that the mechanism will not be repelled by external force, and the mechanism is in a stable state after closing; this key design will also keep the square shaft in the closed state at the beginning of the opening process, and will not cause the contacts to be repelled and jump due to the reduction of the final pressure, thereby reducing the risk of rapid increase in contact temperature and contact ablation.

[0029] Specifically, the double-split mechanism 8 includes: a base 8-1, a first semi-shaft 8-2 and a second semi-shaft 8-3, the base 8-1 has a accommodating cavity, the first semi-shaft 8-2 is installed on one side of the upper end of the base 8-1, and the second semi-shaft 8-3 is installed on the other side of the upper end of the base 8-1, the first semi-shaft 8-2 is sleeved with a first elastic member 8-4, and the second semi-shaft 8-3 is sleeved with a second elastic member 8-5, and the first elastic member 8-4 and the second elastic member 8-5 are located in the middle of the first semi-shaft 8-2 and the second semi-shaft 8-3; It also includes a bracket 8-6, which is located in the accommodating cavity of the base 8-1. The bracket 8-6 includes a first vertical plate, a first horizontal plate and a second vertical plate. The first vertical plate and the second vertical plate are symmetrically arranged, and a spacing is provided between the first vertical plate and the second vertical plate. A first mounting plate 1 and a second mounting plate 2 are provided at the lower ends of the first vertical plate and the second vertical plate. The first mounting plate 1 and the second mounting plate 2 extend away from each other. The first mounting plate 1 and the second mounting plate 2 are both provided with mounting holes, and the bracket 8-6 is fixedly installed on the base 8-1 through the mounting holes. A through hole is also provided on the first horizontal plate, a coil frame 8-7 is provided at the lower end of the bracket 8-6, a static iron core 8-8 is provided at the lower end of the coil frame 8-7, and the lower end of the static iron core 8-8 is fixed to the base 8-1 by riveting, and a moving iron core 8-9 is provided at the upper end of the bracket 8-6, and the moving iron core 8-9 includes a first part and a second part, the lower end of the first part is connected to the upper end of the second part, and the diameter of the second part is larger than the diameter of the second part. Since the diameter of the second part is larger than the diameter of the first part, the coil collides with the static iron core for limiting after being energized and attracted; A toggle rod 8-10 is also provided at the upper end of the moving iron core 8-9, and a mounting hole 8-11 is provided on the toggle rod 8-10, and the toggle rod 8-10 is installed on the upper end of the moving iron core 8-9 through the mounting hole 8-11, and a first synchronous member 8-12 and a second synchronous member 8-13 are respectively provided on both sides of the toggle rod 8-10, one end of the first synchronous member 8-12 is clamped on the first semi-shaft 8-2, and the other end of the first synchronous member 8-12 is located at the lower end of one side of the toggle rod 8-10, one end of the second synchronous member 8-13 is clamped on the second semi-shaft 8-3, and the other end of the second synchronous member 8-13 is located at the lower end of the other side of the toggle rod 8-10; Specifically, the first synchronous member 8-12 and the second synchronous member 8-13 both include: an arc structure, an end of the arc structure close to the toggle rod is further provided with an extension portion, the extension portion and the arc structure are connected in an integrally formed manner, a plane structure is provided at the position where the first semi-shaft 8-2 and the second semi-shaft 8-3 are installed with the arc structure, and the surface of the arc structure close to the first semi-shaft 8-2 and the second semi-shaft 8-3 is also a plane structure, so as to ensure that the arc structure can be tightly connected to the first semi-shaft 8-2 and the second semi-shaft 8-3, and can be firmly fixed to each other by screws; The lower end of the first synchronous member 8-12 is provided with a first protrusion 8-14, and the first protrusion 8-14 is connected with the first synchronous member 8-12 by an integral molding manner. The lower end of the second synchronous member 8-13 is provided with a second protrusion 8-15, and the second protrusion 8-15 is connected with the second synchronous member 8-13 by an integral molding manner. The first protrusion 8-14 is inserted into the straight arm of the first elastic member 8-4, and the second protrusion 8-15 is inserted into the straight arm of the second elastic member 8-5. The toggle rod contacts the first synchronous member 8-12 and the second synchronous member 8-13 to press the first semi-axle 8-2 and the second semi-axle 8-3 into the U-shaped groove of the base 8-1, and the angles of the first semi-axle 8-2 and the second semi-axle 8-3 are limited by the first elastic member 8-4 and the second elastic member 8-5. After assembly, the yield surfaces 8-16 of the first semi-axle 8-2 and the second semi-axle 8-3 are horizontal in a natural state.

[0030] In order to install the first half-shaft 8-2 and the second half-shaft 8-3, the upper ends of the two side plates of the base 8-1 along the length direction are provided with grooves 8-17, and the grooves 8-17 are U-shaped grooves. The grooves 8-17 are used to install the first half-shaft 8-2 and the second half-shaft 8-3, so that the first half-shaft 8-2 and the second half-shaft 8-3 can rotate in the U-shaped grooves.

[0031] In addition, it is worth noting that a pair of first hooks 8-18 and a pair of second hooks 8-19 are provided on the two side plates of the base 8-1 along the width direction. The first hook 8-18 is used to fix the first elastic member 8-4 away from one end of the straight arm of the first elastic member, and the second hook 8-18 is used to fix the second elastic member 8-5 away from one end of the straight arm of the first elastic member, thereby ensuring that the first elastic member 8-4 and the second elastic member 8-5 are fixed on the first hook 8-18 and the second hook 8-19.

[0032] In addition, it should be noted that threaded holes 8-20 are provided on both side panels of the base 8-1 along the length direction. The base is installed between the first mounting plate 1 and the second mounting plate 2 through the threaded holes. Due to the modular installation method of screws and threaded holes, it can be easily disassembled and installed, which is very practical and convenient.

[0033] In addition, it should be noted that the linkage assembly 9 includes a first rotating shaft link 9-1 and a second rotating shaft link 9-2, the first rotating shaft link 9-1 and the second rotating shaft link 9-2 are symmetrically arranged and connected by a square shaft 10, the lower ends of the first rotating shaft link 9-1 and the second rotating shaft link 9-2 are respectively located on both sides of the toggle rod 8-10, and the upper ends of the first rotating shaft link 9-1 and the second rotating shaft link 9-2 are respectively provided with a first sliding link 9-3 and a second sliding link 9-4, the first sliding link 9-3 and the second sliding link 9-4 are close to the first rotating shaft link 8-10. One end of the shaft link 9-1 and the second shaft link 9-2 is connected to the first shaft link 9-1 and the second shaft link 9-2 in a sliding manner, and the upper ends of the first sliding link 9-3 and the second sliding link 9-4 are connected to the lever assembly 7. In order to enable the first sliding link 9-3 and the second sliding link 9-4 to slide on the first shaft link 9-1 and the second shaft link 9-2, waist-shaped sliding grooves 9-5 are provided on the first shaft link 9-1 and the second shaft link 9-2, and the first sliding link and the second sliding link are installed on the waist hole through a sliding shaft.

[0034] Furthermore, two recesses 8-20 are provided on the upper end surfaces of the first half-shaft 8-2 and the second half-shaft 8-3 at positions corresponding to the first rotating shaft link 9-1 and the second rotating shaft link 9-2. The first rotating shaft link 9-1 and the second rotating shaft link 9-2 are arranged to be arcuate surfaces at one end close to the recess 8-20, so that the first rotating shaft link 9-1 and the second rotating shaft link 9-2 can give way or limit their positions on the recess 8-20.

[0035] The present invention is a three-position conversion mechanism. Figures 8 to 14 The process from standby to double split and then to normal is shown; The first coil on the common side is energized, the electromagnet on the common side is attracted, the moving iron core moves downward, and at the same time, the lever passing through the moving iron core and the common side is driven to rotate counterclockwise around the rivet on the mounting plate. When the lever on the common side touches the limit edge of the mounting plate, it stops. At this time, the lever on the common side drives the second coil on the standby side to move upward due to the energization of the coil. At this time, the energy storage component and the standby energy storage component complete energy storage, and the common energy storage component and the left side of the connecting rod fulcrum of the standby energy storage component form angles A and B of about 5 degrees; since one end of the elastic part of the common energy storage component is connected to the common energy storage component and the other end is connected to the lever component, the elastic part of the common energy storage component is stretched to complete energy storage (the movement process of the tension spring on the standby side is the same as above) and then begins to release. At this time, the common energy storage component is pulled to the left under the action of the angle A force, so that it starts to rotate clockwise. Since the common energy storage component and the standby energy storage component are movably connected, the standby side is now under the action of the angle B force, and the elastic part of the standby energy storage component is released and also rotates clockwise.

[0036] During installation, the first sliding link 9-3 and the second sliding link 9-4 are rotatably connected with the common energy storage component 3 and the backup energy storage component 4. When the common energy storage component 3 and the backup energy storage component 4 rotate, the first sliding link 9-3 and the second sliding link 9-4 are driven to swing clockwise, and energy is released through the spring parts of the common energy storage component 3 and the spring parts of the backup energy storage component 4. Fig.10 As shown, the sliding shafts in the waist-shaped holes of the first rotating shaft link 9-1 and the second rotating shaft link 9-2 begin to slide, causing the first rotating shaft link 9-1 and the second rotating shaft link 9-2 to rotate counterclockwise around the center of the square shaft 10. As the arc surfaces 9-6 of the first rotating shaft link 9-1 and the second rotating shaft link 9-2 move away from the yielding surfaces of the first semi-shaft 8-2 and the second semi-shaft 8-3, the first semi-shaft 8-2 begins to rotate counterclockwise until the arc surfaces of the first rotating shaft link 9-1 and the second rotating shaft 8-3 completely leave the yielding surface range, and the first semi-shaft 8-2 rotates to a horizontal state with the original yielding surface 8-21. When the straight arms 9-7 of the first rotating shaft link 9-1 and the second rotating shaft link 9-2 touch the limiting surface 8-22 of the second semi-shaft 8-3 and stop, the switch opening is completed, as shown in FIG. Fig.11 As shown; (Note that at this time, the elastic parts of the mechanism energy storage component and the backup energy storage component have not yet completed the energy release. Due to the advance limit of the second semi-shaft 8-3, it has not yet completed the closing action. When the limit is cancelled, the mechanism will still move to the lever energy storage side.) When the opening coil is energized, the static iron core and the moving iron core are attracted, driving the toggle member 8-10 to move downward, and the toggle member 8-10 is pressed downward on the side close to the first synchronous member 8-11, driving the first synchronous member 8-11 and the second synchronous member 8-12 to twist toward the center. Since the synchronous member and the first semi-shaft 8-2 and the second semi-shaft 8-3 are fixed by screws, they rotate at the same time, and the limiting surfaces of the first semi-shaft 8-2 and the second semi-shaft 8-3 move apart, and the giving way surface turns to the arc surface matching with the first rotating shaft connecting rod 9-1 and the second rotating shaft connecting rod 9-2 to achieve the giving way effect. At this time, the second semi-shaft 8-3 cancels the constraint on the first rotating shaft connecting rod 9-1 and the second rotating shaft connecting rod 9-2, and under the action of the first elastic member 8-4 and the second elastic member 8-5 continuing to release energy and pull back, the first rotating shaft connecting rod 9-1 and the second rotating shaft connecting rod 9-2 continue to rotate counterclockwise, and the switch is closed accordingly. Fig.14 As shown, the arc wall of the shaft connecting rod blocks the second half shaft 8-3 and the displacement surface 8-16 makes it impossible for the elastic member to drive the second half shaft to rotate back to the original position. Since the coil of the first half shaft has been de-energized, the first elastic member begins to release energy to drive the first half shaft to rotate back to the original position and the displacement surface 8-16 is horizontal; at this time, the mechanism backup energy storage component swings and contacts the rivet and is limited, and the first sliding connection 9-3, the second sliding connection 9-4 and the first shaft connecting rod 9-1, the second shaft connecting rod 9-2 reach an acute angle D as shown in FIG. Fig.14After the closing action is completed, the elastic parts of the common energy storage component and the backup energy storage component are maintained (it is worth mentioning that when the common side is closed, the moving contact and the static contact are in a just-contact state. Through design calculation, the mechanism has reached the maximum force value that can overcome the final pressure through the action of the elastic part and the connecting rod at this position. At present, the angle between a pair of rotating shaft connecting rods and a pair of sliding connecting rods is about 110 degrees. As the closing state continues, the angle gradually decreases, and the overcome force will increase proportionally until the acute angle D is reached between the connecting rods to enter a stable state. This key design will also keep the square shaft in the closed state at the beginning of the opening process, and will not cause the contacts to be repelled and jump due to the reduction of the final pressure, thereby reducing the risk of rapid increase in contact temperature and contact ablation).

[0037] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be considered as the scope of protection of the present invention.

Claims

1. A three-stage operating mechanism, comprising: A first mounting plate, a second mounting plate, a common energy storage component, a backup energy storage component, a first coil, a second coil and a lever component, the first mounting plate and the second mounting plate are symmetrically arranged, a receiving cavity is reserved between the first mounting plate and the second mounting plate, the common energy storage component is installed at one end of the receiving cavity, the backup energy storage component is installed at the other end of the receiving cavity, the first coil is located at the lower end of the common energy storage component, the second coil is located at the lower end of the backup energy storage component, the common energy storage component and the backup energy storage component are movably connected, and the other ends of the common energy storage component and the backup energy storage component are linked by the lever component, the first coil and the second coil; characterized in that It also includes a double-division mechanism, which is located between the first coil and the second coil. The double-division mechanism plays a role of giving way and limiting the linkage mechanism. The double-division mechanism 8 realizes three-position conversion.

2. The three-stage operating mechanism according to claim 1, characterized in that: The double-split mechanism comprises: a base, a first half-shaft and a second half-shaft, the base having a receiving cavity, the first half-shaft being mounted on one side of the upper end of the base, the second half-shaft being mounted on the other side of the upper end of the base, the first half-shaft being sleeved with a first elastic member, the second half-shaft being sleeved with a second elastic member; It also includes a bracket, which is located in the accommodating cavity of the base, and the lower end of the bracket is provided with a coil frame, the lower end of the coil frame is provided with a static iron core, the upper end of the bracket is provided with a moving iron core, and the upper end of the moving iron core is also provided with a toggle rod, and the two sides of the toggle rod are respectively provided with a first synchronous component and a second synchronous component, one end of the first synchronous component is clamped on the first half-shaft, and the other end of the first synchronous component is located at the lower end of one side of the toggle rod, one end of the second synchronous component is clamped on the second half-shaft, and the other end of the first synchronous component is located at the lower end of the other side of the toggle rod.

3. The three-stage operating mechanism according to claim 2, characterized in that: The upper ends of the two side plates of the base along the length direction are provided with grooves, and the grooves are used to install the first half-shaft and the second half-shaft.

4. The three-stage operating mechanism according to claim 2, characterized in that: The lower end of the first synchronous member is provided with a first convex point, and the lower end of the second synchronous member is provided with a second convex point. The first convex point is inserted into the straight arm of the first elastic member, and the second convex point is inserted into the straight arm of the second elastic member.

5. The three-stage operating mechanism according to claim 3, characterized in that: A pair of first hooks and a pair of second hooks are provided on the two side plates of the base along the width direction, the first hook is used to fix one end of the first elastic member away from the straight arm of the first elastic member, and the second hook is used to fix one end of the second elastic member away from the straight arm of the first elastic member.

6. The three-stage operating mechanism according to claim 5, characterized in that: The base is provided with threaded holes on both side plates along the length direction, and the base is installed between the first installation plate and the second installation plate through the threaded holes.

7. The three-stage operating mechanism according to claim 1, characterized in that: The linkage assembly includes a first rotating shaft link and a second rotating shaft link, the first rotating shaft link and the second rotating shaft link are symmetrically arranged and connected by a square shaft, the lower ends of the first rotating shaft link and the second rotating shaft link are respectively located on both sides of the toggle rod, the upper ends of the first link and the second link are respectively provided with a first sliding link and a second sliding link, the ends of the first sliding link and the second sliding link close to the first link and the second link are connected to the first link and the second link by sliding, and the upper ends of the first sliding link and the second sliding link are connected to the lever assembly.

8. The three-stage operating mechanism according to claim 7, characterized in that: The first rotating shaft connecting rod and the second rotating shaft connecting rod are both provided with waist-shaped sliding grooves.

9. The three-stage operating mechanism according to claim 1, characterized in that: Two recesses are also provided on the upper end surfaces of the first half-shaft and the second half-shaft corresponding to the positions of the first rotating shaft connecting rod and the second rotating shaft connecting rod. One end of the first rotating shaft connecting rod and the second rotating shaft connecting rod close to the recess is arranged to be an arc surface, so that the first rotating shaft connecting rod and the second rotating shaft connecting rod can give way or limit their positions on the recess.

10. A dual power conversion switch, characterized in that: It comprises the three-stage operating mechanism as described in any one of claims 1 to 9.

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