A locking and unlocking mechanism for an isolating switch

Abstract

A locking and unlocking mechanism for an isolating switch is characterized in that a lock catch (7) is mounted on an operating mechanism and is located within cavity three (c), and a tripping function component is directly arranged inside the rotary isolating switch, which not only reduces the volume of the switch product and reduces the product cost, but also improves the reliability and safety of the isolating switch.

Description

Technical Field

[0001] The present invention belongs to the technical field of switches, and in particular relates to a locking and unlocking mechanism of an isolating switch. Background Art

[0002] The word "switch" means to open and close. It refers to a component that can open a circuit, interrupt the current, or cause it to flow to another circuit. The most common switch is a human-operated electromechanical device with one or more contacts. The "closed" state of a contact means that the contact is conductive, allowing current to flow; the "open" state of a switch means that the contact is not conductive, forming an open circuit, and does not allow current to flow. The development history of switches has evolved from the original knife switch that required manual operation to the intelligent switch currently used in various large-scale electrical control equipment. Switches have more and more functions and are safer. Isolating switches are low-voltage electrical equipment commonly used in circuits. They can change their on / off state through front or side operation.

[0003] Common isolating switches include linear isolating switches and rotary isolating switches. Common rotary isolating switches include an operating mechanism and several contact modules, wherein the structure of the contact modules determines the arc extinguishing effect of the isolating switch. The external structure of the existing rotary isolating switch is a rectangular parallelepiped, and the contact parts of the moving contact assembly and the static contact assembly on the same side of the adjacent upper and lower contact modules and the lower contact module are arranged at a certain angle. However, this traditional rotary isolating switch with an upper and lower structure has limitations in its application scenarios. It cannot be used in scenarios that require horizontal installation, or even if it can be installed, it will cause inconvenience in operation. At the same time, the existing rotary isolating switches with vertically arranged contact modules have no tripping function or the tripping function requires additional accessories to be realized, which not only increases the volume and product cost of the entire switch, but also reduces the reliability of the isolating switch. Summary of the Invention

[0004] The purpose of the present invention is to provide a locking and unlocking mechanism for an isolating switch, in which the tripping function components are directly arranged inside the rotary isolating switch, in order to address the defects that the existing rotary isolating switches mentioned above cannot realize the tripping function or require additional accessories to realize the tripping function, thereby increasing the volume and product cost of the entire switch and reducing the reliability of the isolating switch. This invention not only reduces the volume of the switch product and reduces the product cost, but also improves the reliability and safety of the isolating switch.

[0005] Technical Solution

[0006] In order to achieve the above technical objectives, the present invention provides a locking and unlocking mechanism for an isolating switch, characterized in that the lock is installed on the operating mechanism and is located in cavity three.

[0007] Furthermore, the operating mechanism includes a handle shaft, which is rotatably mounted on the unit box, one end of the annular connecting rod is connected to the handle shaft, and the other end is mounted in a linkage slide slot on one end of the bracket, the bracket is mounted on the unit box through axis one and can rotate around axis one, the other end of the bracket is rotatably mounted with a linkage connecting rod through axis two, the linkage connecting rod can rotate around axis two, and one end of the linkage connecting rod is connected to a reset spring.

[0008] Furthermore, the linkage connecting rod and the shaft are overlapped and limited.

[0009] Furthermore, the lock is connected to the bracket through a rotating shaft, and the other end of the annular connecting rod passes through the linkage slide slot hole on the bracket and overlaps with the lock, and the traction rod corresponds to the lock. When closing the switch, the handle drives the annular connecting rod through the handle shaft to drive the bracket and the lock to rotate and then self-lock, thereby realizing the locking of the four-bar linkage formed by the handle shaft, annular connecting rod, bracket and lock. When disengaging, the traction rod rotates to push the lock to rotate and release the lock from the annular connecting rod, thereby realizing the unlocking of the four-bar linkage formed by the handle shaft, annular connecting rod, bracket and lock.

[0010] Furthermore, one end of the return spring is connected to the linkage link, and the other end is mounted on the unit box.

[0011] Furthermore, the traction rod is installed on the unit box.

[0012] Beneficial effects

[0013] The locking and unlocking mechanism of the isolating switch provided by the present invention arranges the operating mechanism and contact system of the rotary switch in a horizontal direction, thereby increasing the scope of application scenarios of the rotary isolating switch and arranging the tripping functional components directly inside the rotary isolating switch, which not only reduces the volume of the switch product and reduces the product cost, but also improves the reliability and safety of the isolating switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attachment Figure 1 This is a product diagram of an isolating switch in an embodiment of the present invention.

[0015] Attachment Figure 2 1 is an exploded view of an isolating switch in an embodiment of the present invention.

[0016] Attachment Figure 3 1 is a schematic diagram of the exploded view of the shell and the unit box in an embodiment of the present invention.

[0017] Attachment Figure 4 is a schematic diagram of the cavity layout in an embodiment of the present invention;

[0018] Attachment Figure 5This is a schematic diagram of the operating mechanism structure in an embodiment of the present invention;

[0019] Attachment Figure 6a 2 is a schematic diagram of the structure of the contact support 1 or the contact support 2 in an embodiment of the present invention;

[0020] Attachment Figure 6b Schematic diagram of the position of the first chute hole or the second chute hole in an embodiment of the present invention;

[0021] Attachment Figure 7a This is a schematic structural diagram of the movable contact 1 or the movable contact 2 in an embodiment of the present invention;

[0022] Attachment Figure 7b This is a schematic diagram of the installation of the moving contact 1 or the moving contact 2 in the embodiment of the present invention. Figure 1 ;

[0023] Attachment Figure 7c This is a schematic diagram of the installation of the moving contact 1 or the moving contact 2 in the embodiment of the present invention. Figure 2 ;

[0024] Attachment Figure 8 This is a schematic diagram of the structure of branch A in an embodiment of the present invention;

[0025] Attachment Figure 9 This is a schematic diagram of the structure of branch B in an embodiment of the present invention;

[0026] Attachment Figure 10 This is a schematic diagram of the installation position of branch A in an embodiment of the present invention;

[0027] Attachment Figure 11 This is a schematic diagram of the installation position of branch B in an embodiment of the present invention;

[0028] Attachment Figure 12 This is a schematic diagram of the position of the operating mechanism in an embodiment of the present invention;

[0029] Attachment Figure 13 1 is a schematic diagram of the installation of the contact system 2 in an embodiment of the present invention;

[0030] Attachment Figure 14 Schematic diagram of the connection between the linkage connecting rod and the linkage shaft in an embodiment of the present invention;

[0031] Attachment Figure 15a Schematic diagram of the positions of the linkage link, contact support 1, and contact support 2 in an embodiment of the present invention Figure 1 ;

[0032] Attachment Figure 15b Schematic diagram of the positions of the linkage link, contact support 1, and contact support 2 in an embodiment of the present invention Figure 2 ;

[0033] Attachment Figure 16 Schematic diagram of each breakpoint in an embodiment of the present invention;

[0034] Attachment Figure 17 This is a schematic diagram of the installation of the contact system in an embodiment of the present invention;

[0035] Attachment Figure 18 This is a schematic diagram of the unit box in the open state of the embodiment of the present invention;

[0036] Attachment Figure 19 This is a schematic diagram of the unit box in the closed state of the embodiment of the present invention;

[0037] Attachment Figure 20a This is a schematic diagram of the four-bar linkage mechanism when the embodiment of the present invention is in the open state. Figure 1 ;

[0038] Attachment Figure 20b This is a schematic diagram of the four-bar linkage mechanism when the embodiment of the present invention is in the open state. Figure 2 ;

[0039] Attachment Figure 21a This is a schematic diagram of the four-bar linkage mechanism in the closed state of the embodiment of the present invention. Figure 1 ;

[0040] Attachment Figure 21b This is a schematic diagram of the four-bar linkage mechanism in the closed state of the embodiment of the present invention. Figure 2 ;

[0041] Attachment Figure 22a This is an example of the embodiment of the present invention being in a tripped state. Figure 1 .

[0042] Attachment Figure 22b This is an example of the embodiment of the present invention being in a tripped state. Figure 2 . DETAILED DESCRIPTION

[0043] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0044] In the description of the present invention, it should be noted that the terms "inner" and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0046] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0047] Example

[0048] As attached Figure 1 , 2, 3 and 4, a disconnector comprises a housing 1 and a unit box 2, the unit box 2 being mounted in the inner cavity of the housing 1, the outer wall of one side of the unit box 2 and the inner wall of the corresponding side of the housing 1 forming a cavity a, the outer wall of the other side of the unit box 2 and the inner wall of the corresponding side of the housing 1 forming a cavity b, a cavity c is provided in the unit box 2, the cavity a and cavity b are located on both sides of the cavity c, the operating mechanism is mounted in the cavity c, the contact system 3 and the arc extinguishing chamber 4 are mounted in the cavity a and cavity b, the handle assembly 5 comprises a handle 5a and a handle connecting rod 5b, the handle connecting rod 5b passes through the through holes on the housing 1 and the unit box 2 and is fixedly connected to the handle shaft 8. As shown in the attached figure Figure 18 As shown, the lock 7 is mounted on the operating mechanism and located in the cavity 3 C. The handle assembly 5 drives the linkage shaft 6 through the operating mechanism to drive the contact system 3 to perform closing and opening operations to achieve the on and off of the disconnector.

[0049] More specifically, as shown in the attached Figure 3 and 4 As shown, the unit box 2 includes a unit box left cover 201 and a unit box right cover 202, and the shell 1 includes a shell left cover 101 and a shell right cover 102. The unit box left cover 201 and the unit box right cover 202 are assembled to form cavity three c, the shell left cover 101 and the unit box left cover 201 are assembled to form cavity one a, and the shell right cover 102 and the unit box right cover 202 are assembled to form cavity two b.

[0050] As attached Figure 5 , 12, 13, the operating mechanism includes a handle shaft 8, the handle shaft 8 is rotatably mounted on the unit box 2, one end of the annular connecting rod 9 is connected to the handle shaft 8, and the other end is mounted in the linkage slide hole 10a on one end of the bracket 10, the bracket 10 is mounted on the unit box 2 through the shaft 11 and can rotate around the shaft 11, and at the same time Figure 18 and 19As shown, the other end of the bracket 10 is rotatably provided with a linkage rod 13 through the second shaft 12. The linkage rod 13 can rotate around the second shaft 12 and is overlapped and limited with the first shaft 11. One end of the linkage rod 13 is connected to a return spring 14, and the linkage slot 13a at the other end is as shown in the attached figure. Figure 14 As shown, a linkage shaft 6 is installed. In this embodiment, one end of the return spring 14 is connected to the linkage link 13, and the other end is installed on the unit box 2.

[0051] As attached Figure 18 and 19 As shown, the lock buckle 7 is rotatably connected to the bracket 10 through the rotating shaft 15, and the other end of the annular connecting rod 9 passes through the linkage slide slot hole 10a on the bracket 10 and overlaps with the lock buckle 7. The traction rod 16 is installed on the unit box 2 and corresponds to the lock buckle 7.

[0052] As attached Figure 2 As shown in Figures 6a, 6b, 7a, 7b, 7c, and 17, the contact system 3 includes contact system 1 3a and contact system 2 3b, and the arc extinguishing chamber 4 includes arc extinguishing chamber 1 4a and arc extinguishing chamber 2 4b. The contact system 1 3a and arc extinguishing chamber 1 4a are installed in the cavity 1 a, and the contact system 2 3b and arc extinguishing chamber 2 4b are installed in the cavity 2 b. The arc extinguishing chamber 1 4a is installed in the cavity 1 a and is located on the rotation track of the contact support 1 3a01. There are two arc extinguishing chambers 1 4a. The arc extinguishing chamber 2 4b is installed in the cavity 2 b and is located on the rotation track of the contact support 2 3b01. There are two arc extinguishing chambers 2 4b.

[0053] Further explanation as attached Figure 6a , 6b, 7a, 7b and 7c, the contact system 3a includes a contact support 3a01, and the contact support 3a01 is located as shown in the attached Figure 10 The movable contact 3a02 is installed in the mounting groove 1a1 in the cavity 1a and is rotatably mounted in the cavity 1a via the mounting shaft 1a2. The movable contact 1a02 is installed in the slide hole 1a0101 on the contact support 1a01 and can slide back and forth in the slide hole 1a0101. The two ends of the movable contact 1a02 are located outside the slide hole 1a0101. The movable contact 1a02 is provided with a limiting hole 1a0201 and a limiting hole 2a0202. The limiting shaft 1a03 and the limiting shaft 2a04 pass through the corresponding limiting hole 1a0201 and the limiting hole 2a0202 and are then installed on the contact support 1a01. As shown in the attached figure, Figure 15a and 15b As shown, the contact support 3a01 is provided with a linkage hole 3a0102, and one end of the linkage shaft 6 passes through the left cover 201 of the unit box as shown in the attached Figure 2The arc-shaped through hole 1 201a is installed in the linkage hole 1 3a0102. In this embodiment, the limiting hole 1 3a0201 and the limiting hole 2 3a0202 are waist-shaped limiting holes.

[0054] As attached Figure 6a , 6b, 7a, 7b and 7c, the contact system 2 3b includes a contact support 2 3b01, the contact support 2 3b01 is located as shown in the attached Figure 11 The second moving contact 3b02 is installed in the second mounting groove 2b1 in the second cavity 2b and is rotated by the second mounting shaft 2b2. The second moving contact 3b02 is installed in the second sliding groove hole 3b0101 on the second contact support 3b01 and can slide back and forth in the second sliding groove hole 3b0101. The two ends of the second moving contact 3b02 are located outside the second sliding groove hole 3b0101. The second moving contact 3b02 is provided with a third limiting hole 3b0201 and a fourth limiting hole 3b0202. The third limiting shaft 3b03 and the fourth limiting shaft 3b04 pass through the corresponding third limiting hole 3b0201 and the fourth limiting hole 3b0202 and are installed on the second contact support 3b01. As shown in the attached figure Figure 15a and 15b As shown, the contact support 3b01 is provided with a linkage hole 3b0102, and the other end of the linkage shaft 6 passes through the right cover 202 of the unit box as shown in the attached Figure 2 The arc-shaped through hole 202a is installed in the linkage hole 2 3b0102. In this embodiment, the limiting hole 3b0201 and the limiting hole 4 3b0202 are waist-shaped limiting holes.

[0055] As attached Figure 2 and 16 As shown, the moving contact 1 3a02 and the moving contact 2 3b02 are arranged in a staggered manner. Figure 8, 9, 10 and 11, the two ends of the moving contact 1 3a02 are respectively equipped with a moving contact 1 3a0203 and a moving contact 2 3a0204, the two ends of the moving contact 2 3b02 are respectively equipped with a moving contact 3 3b0203 and a moving contact 4 3b0204, the two ends of the moving contact 1 3a02 are respectively corresponding to the static contact assembly 1 3a05 and the static contact assembly 2 3a06 installed in the cavity 1 a, the two ends of the moving contact 2 3b02 are respectively corresponding to the static contact assembly 3 3b05 and the static contact assembly 4 3b06 installed in the cavity 2 b Correspondingly, the static contact assembly 1 3a05 includes a terminal block 1 3a0501, a static contact 1 3a0502 and a static contact 1 3a0503; the static contact assembly 2 3a06 includes a terminal block 2 3a0601, a static contact 2 3a0602 and a static contact 2 3a0603; the static contact assembly 3 3b05 includes a terminal block 3 3b0501, a static contact 3 3b0502 and a static contact 3 3b0503; and the static contact assembly 4 3b06 includes a terminal block 4 3b0601, a static contact 4 3b0602 and a static contact 4 3b0603. In this embodiment, the terminal block 1 3a0501 and the static contact 1 3a0502 are integrated, and the static contact 1 3a0503 is mounted on the contact end of the static contact 1 3a0502; the terminal block 2 3a0601 and the static contact 2 3a0602 are integrated, and the static contact 2 3a0603 is mounted on the contact end of the static contact 2 3a0602; the terminal block 3 3b0501 and the static contact 3 3b0502 are integrated, and the static contact 3 3b0503 is mounted on the contact end of the static contact 3 3b0502; the terminal block 4 3b0601 and the static contact 4 3b0602 are integrated, and the static contact 4 3b0603 is mounted on the contact end of the static contact 4 3b0602.

[0056] As attached Figure 8 and 10 As shown, the terminal block 1 3a0501, static contact 1 3a0502, static contact 1 3a0503, moving contact 2 3a0204, moving contact 1 3a02, moving contact 1 3a0203, static contact 2 3a0603, static contact 2 3a0602, and terminal block 2 3a0601 are sequentially connected in series to form branch A; as shown in the attached Figure 9 and 11 As shown, terminal block three 3b0501, static contact three 3b0502, static contact three 3b0503, moving contact three 3b0203, moving contact two 3b02, moving contact four 3b0204, static contact four 3b0603, static contact four 3b0602, and terminal block four 3b0601 are connected in series to form branch B.

[0057] As attached Figure 8, as shown in Figures 9, 10, 11 and 16, the moving contact 1 3a0203 and the static contact 2 3a0603 form a fracture M, the moving contact 2 3a0204 and the static contact 1 3a0503 form a fracture K, the moving contact 3 3b0203 and the static contact 3 3b0503 form a fracture Q, and the moving contact 4 3b0204 and the static contact 4 3b0603 form a fracture P. Generally speaking, due to processing errors and dimensional tolerances, when the circuit breaker is closed, the moving contacts at both ends of the moving contact 1 3a02 or the moving contact 2 3b02 cannot contact the corresponding static contacts at the same time. Therefore, since in this embodiment, the moving contact 1 3a02 or the moving contact 2 3b02 can slide, when any one of the fractures M, fracture K, fracture Q, and fracture P completes the closing action, the moving contact 1 3a02 or the moving contact 2 3b02 will slide in the corresponding slide slot hole 1 3a0101 or the slide slot hole 2 3b0101, thereby ensuring that the moving contact at the other end of the moving contact 1 3a02 or the moving contact 2 3b02 contacts the corresponding static contact, thereby achieving the closing of the other fracture. Then, the linkage shaft 6 continues to move in the linkage slot hole 13a, and the other end of the linkage shaft 6 drives the moving contact of the contact system on the other side to move so that the corresponding moving contact contacts the corresponding static contact in succession, thereby completing the closing action of the remaining two fractures.

[0058] When closing the circuit breaker, an external force drives the handle assembly 5 to drive the handle shaft 8 to rotate around the rotation center O1. The handle shaft 8 rotates, and the annular connecting rod 9 is acted on by the connection point O2 with the annular connecting rod 9 to move. The movement of the annular connecting rod 9 drives the bracket 10 to rotate around its own rotation center O3 and the lock buckle 7 to rotate around its own rotation center O4. After the closing is completed, the annular connecting rod 9 and the lock buckle 7 are self-locked, thereby realizing the locking of the four-bar linkage formed by the handle shaft 8, the annular connecting rod 9, the bracket 10 and the lock buckle 7. Figure 19 When the lock is released, the traction rod 16 rotates around the rotation center O5 to give the lock buckle 7 a thrust F, which pushes the lock buckle 7 to rotate and release the lock buckle 7 from the annular connecting rod 9, thereby unlocking the four-bar linkage formed by the handle shaft 8, the annular connecting rod 9, the bracket 10 and the lock buckle 7, as shown in the attached figure. Figure 22a After the four-bar linkage is unlocked, the handle shaft 8 rotates around the rotation center O1 under the action of the handle spring force, driving the annular connecting rod 9 to move. Figure 22b Under the action of the reset force f of the reset spring 14 shown, the linkage link 13 rotates on the shaft 11, and at the same time drives the bracket 10 to rotate around the shaft 11 through the shaft 2 12, and the annular link 9 moves along the linkage slot hole 10a in the bracket 10 to complete the tripping and unlocking process as shown in the attached figure. Figure 20a , 20b, 21a, 22a and 22b.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A locking and unlocking mechanism for an isolating switch, characterized in that: The lock catch (7) is mounted on the operating mechanism and is located in cavity three (c); The operating mechanism includes a handle shaft (8), the handle shaft (8) is rotatably mounted on the unit box (2), one end of an annular connecting rod (9) is connected to the handle shaft (8), and the other end is mounted in a linkage slot hole (10a) on one end of a bracket (10), the bracket (10) is mounted on the unit box (2) through shaft one (11) and can rotate around shaft one (11), the other end of the bracket (10) is rotatably mounted with a linkage connecting rod (13) through shaft two (12), the linkage connecting rod (13) can rotate around shaft two (12), one end of the linkage connecting rod (13) is connected to a reset spring (14), and a linkage shaft (6) is mounted in a linkage slot hole (13a) at the other end, and the linkage connecting rod (13) and shaft one (11) are overlapped and matched to limit the position; The lock catch (7) is connected to the bracket (10) by a rotating shaft (15), and the other end of the annular connecting rod (9) passes through the linkage sliding slot hole (10a) on the bracket (10) and is overlapped with the lock catch (7). The traction rod (16) corresponds to the lock catch (7). When the switch is closed, the handle assembly (5) drives the annular connecting rod (9) to drive the bracket (10) and the lock catch (7) to rotate through the handle rotating shaft (8) and then self-lock, thereby achieving the locking of the four-bar linkage formed by the handle rotating shaft (8), the annular connecting rod (9), the bracket (10) and the lock catch (7). When the switch is released, the traction rod (16) rotates to push the lock catch (7) to rotate and release the locking of the annular connecting rod (9) by the lock catch (7), thereby achieving the unlocking of the four-bar linkage formed by the handle rotating shaft (8), the annular connecting rod (9), the bracket (10) and the lock catch (7). The unit box (2) comprises a unit box left cover (201) and a unit box right cover (202), the unit box left cover (201) and the unit box right cover (202) are assembled to form a cavity three (c), and the operating mechanism is installed in the cavity three (c); the outer wall of one side of the unit box (2) and the inner wall of the corresponding one side of the shell (1) form a cavity one (a), the outer wall of the other side of the unit box (2) and the inner wall of the corresponding other side of the shell (1) form a cavity two (b), and the contact system (3) is installed in the cavity one (a) and the cavity two (b), one end of the linkage shaft (6) passes through the arc-shaped through hole one (201a) on the unit box left cover (201), and the other end of the linkage shaft (6) passes through the arc-shaped through hole two (202a) on the unit box right cover (202), and the handle assembly (5) drives the linkage shaft (6) through the operating mechanism to drive the contact system (3) to perform closing and opening operations, thereby realizing the on and off of the disconnector; One end of the return spring (14) is connected to the linkage link (13), and the other end is mounted on the unit box (2).

2. The locking and unlocking mechanism of the isolating switch according to claim 1, characterized in that: The traction rod (16) is mounted on the unit box (2).

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