Isolating switch with easy-to-adjust opening force

Abstract

The utility model relates to the technical field of low-voltage isolating switch electric appliances, in particular to an isolating switch with easy-to-adjust opening force, which comprises a bottom plate, an operating mechanism and a counter-force mechanism. The operating mechanism comprises an output shaft and a cantilever. The two ends of the cantilever are connected with the output shaft and the cylindrical pin respectively. The counter-force mechanism comprises a support, a reinforcing plate, an adjusting screw, a round nut, an adjusting plate, a supporting plate, a pin shaft and a counter-force spring. A round hole is formed in the top face of the reinforcing plate, the top of the adjusting screw is arranged in the round hole, the round nut is arranged on the adjusting screw and is in threaded connection with the adjusting screw, and the adjusting plate is fixedly connected with the round nut. The supporting plate is connected with the support through the pin shaft and located above the cylindrical pin. The top and the bottom of the counter-force spring abut against the bottom face of the adjusting plate and the inner bottom face of the supporting plate respectively. By changing the position of the round nut on the adjusting screw, the adjusting plate moves upwards or downwards, the telescopic length of the counter-force spring can be adjusted according to the requirement, and finally the purpose of adjusting the magnitude of the opening force according to the requirement is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage disconnector electrical appliances, and specifically relates to a disconnector with an easily adjustable opening force. Background Art

[0002] In a power distribution system, there are two design directions for disconnectors. One design direction is to develop a disconnector based on a frame circuit breaker with relatively close functions, and its contact form belongs to the clapper type. The other design direction is to use the operating mechanism of a frame circuit breaker to drive a switch with plug-in contacts. Compared with the switch with clapper contacts, the opening force of the switch with plug-in contacts is relatively greater. When the operating mechanism of the frame circuit breaker drives the switch with plug-in contacts to open, an additional reaction spring for increasing the opening force needs to be added, and the energy storage of the reaction spring is provided when the operating mechanism closes.

[0003] The disadvantage of the prior art is that the telescopic length of the reaction spring cannot be adjusted according to requirements, resulting in the opening force not being able to be adjusted according to requirements either. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a disconnector with an easily adjustable opening force. By changing the position of the round nut on the adjusting screw, the adjusting plate can be moved up or down, so that the telescopic length of the reaction spring can be adjusted according to requirements, and finally the purpose of adjusting the opening force according to requirements can be achieved.

[0005] To achieve the above object, the technical solution adopted by the present utility model is as follows: An isolating switch with easily adjustable opening force, comprising: a bottom plate; an operating mechanism fixedly arranged on the front surface of the bottom plate; a reaction force mechanism arranged between the top of the operating mechanism and the bottom plate; the operating mechanism includes: an output shaft, with both ends of the output shaft located on the left and right sides of the operating mechanism respectively; a cantilever, one end of the cantilever is connected to the middle part of the rear side of the output shaft, and the other end of the cantilever is connected to a cylindrical pin; the reaction force mechanism includes: a bracket fixedly connected to the bottom plate; a reinforcing plate arranged inside the bracket and fixedly connected to the bracket; an adjusting screw, a circular hole is provided on the top surface of the reinforcing plate, the top of the adjusting screw is arranged in the circular hole, an adjusting hole is provided on the top surface of the bracket, the circular hole and the adjusting hole are concentrically arranged, and the diameter of the circular hole is larger than the diameter of the adjusting hole; a round nut arranged on the adjusting screw and threadedly connected to the adjusting screw; an adjusting plate sleeved on the outer surface of the round nut and fixedly connected to the round nut; a support plate arranged inside the bracket, each of the left and right ends of the support plate is provided with a pin shaft, each of the side walls on the left and right sides of the bracket is provided with a sliding groove, one end of the pin shaft is fixedly connected to the support plate, the other end of the pin shaft extends into the sliding groove and can slide along the inner wall of the sliding groove, and the support plate is located above the cylindrical pin; a reaction force spring arranged inside the bracket, the top of the reaction force spring abuts against the bottom surface of the adjusting plate, and the bottom of the reaction force spring abuts against the inner bottom surface of the support plate.

[0006] Preferably, the adjusting plate is located in the middle of the outer surface of the round nut, the bottom of the round nut extends into the inside of the reaction force spring, and the outer diameter of the round nut is the same as the inner diameter of the reaction force spring; a first cylinder is provided on the inner bottom surface of the support plate, the bottom of the first cylinder is fixedly connected to the support plate, the top of the first cylinder extends into the inside of the reaction force spring, and the diameter of the first cylinder is the same as the inner diameter of the reaction force spring.

[0007] Preferably, a limiting sliding groove is provided on the side wall of the reinforcing plate, a convex plate is provided on the adjusting plate, the convex plate extends into the limiting sliding groove and can slide along the inner wall of the limiting sliding groove, and the shape of the limiting sliding groove matches the shape of the convex plate.

[0008] Preferably, two cushion blocks are fixedly arranged on the outer bottom surface of the support plate, there are three cantilevers, the three cantilevers are arranged at equal intervals, the first ends of the three cantilevers are all fixedly connected to the output shaft, the second ends of the three cantilevers are all fixedly connected to the cylindrical pin, and a bushing is arranged between two adjacent cantilevers, the bushing is sleeved on the outer surface of the cylindrical pin and is rotatably connected to the cylindrical pin.

[0009] Preferably, it further includes a housing detachably connected to the bottom plate. The operating mechanism and the reaction mechanism are both arranged inside the housing. A tool hole is provided on the top surface of the housing, and the tool hole is concentric with the adjustment hole.

[0010] Preferably, it further includes two support seats respectively located on both sides of the operating mechanism and mirror-symmetric in structure. The support seats are fixedly connected to the bottom plate. The support seat includes a first angle plate and a second angle plate, both of which are in an L-shaped structure. An opening groove is provided on the first angle plate, and a semi-circular groove is provided on the second angle plate. The opening groove and the semi-circular groove jointly enclose a circular hole. The first angle plate and the second angle plate are fixedly connected. The diameter of the circular hole is the same as the diameter of the output shaft. The output shaft is arranged in the circular hole and is rotatably connected to the support seat.

[0011] Preferably, switch mechanisms are provided on both sides of the operating mechanism. The switch mechanism includes at least one switch module. The switch module closest to the operating mechanism is connected to the output shaft through a transmission mechanism. The transmission mechanism includes: a first crank, the first end of which is fixedly connected to the end of the output shaft, and a long hole is provided at the second end of the first crank; a side plate arranged between the first crank and the switch module closest to the operating mechanism and fixedly connected to the bottom plate; a second crank arranged between the first crank and the side plate, a first avoidance hole is provided in the middle of the second crank, a second cylinder is provided at the end of the second crank away from the bottom plate, the first end of the second cylinder is fixedly connected to the second crank, and the second end of the second cylinder extends into the long hole and can slide along the inner wall of the long hole; a pressing plate arranged between the first crank and the second crank, the pressing plate is inclined, and a pillar is provided at each end of the pressing plate. The two ends of the pillar are respectively fixedly connected to the pressing plate and the side plate, and a jack is provided in the middle of the pressing plate; a first spline shaft, a second avoidance hole is provided in the middle of the side plate, the first spline shaft is arranged in the second avoidance hole, a rotating shaft is provided on the switch module, the first end of the first spline shaft is connected to the rotating shaft, a third cylinder is provided at the second end of the first spline shaft, the third cylinder passes through the first avoidance hole and extends into the jack and can slide along the inner wall of the jack. The shape of the first avoidance hole matches the shape of the first spline shaft.

[0012] Preferably, when the number of the switch modules on any side of the operating mechanism is greater than one, a second spline shaft is provided between two adjacent switch modules, and the two ends of the second spline shaft are respectively connected to the rotating shafts on the two adjacent switch modules.

[0013] The beneficial effects of using the present utility model are as follows:

[0014] When the present utility model is in use, by changing the position of the round nut on the adjusting screw, the adjusting plate moves upward or downward, and the telescopic length of the reaction spring can be adjusted according to requirements, and finally the purpose of adjusting the opening force according to requirements is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is an axonometric view of the present utility model from the first angle;

[0016] Figure 2 is an axonometric exploded view (hiding the outer shell) of the present utility model;

[0017] Figure 3 is Figure 2 an enlarged view of part A in

[0018] Figure 4 is an axonometric view of the support base in the present utility model;

[0019] Figure 5 is an axonometric view of the present utility model from the second angle (hiding the bottom plate);

[0020] Figure 6 is Figure 5 an enlarged view of part B in

[0021] Figure 7 is Figure 6 an enlarged view of part C in

[0022] Figure 8 is a right view structural schematic diagram of the present utility model;

[0023] Figure 9 is Figure 8 an enlarged view of part D in

[0024] Figure 10 is Figure 9 an enlarged view of part E in

[0025] The reference numerals include:

[0026] 1 - Base plate, 2 - Operating mechanism, 21 - Output shaft, 22 - Cantilever, 23 - Cylindrical pin, 24 - Bushing, 3 - Reaction mechanism, 31 - Bracket, 311 - Adjusting hole, 312 - Sliding groove, 32 - Reinforcing plate, 321 - Round hole, 322 - Limit sliding groove, 33 - Adjusting screw, 34 - Round nut, 35 - Adjusting plate, 351 - Convex plate, 36 - Support plate, 361 - First cylinder, 37 - Pin shaft, 38 - Reaction spring, 39 - Spacer block, 4 - Outer shell, 41 - Tool hole, 5 - Support seat, 51 - First angle plate, 511 - Open slot, 52 - Second angle plate, 521 - Semi - circular groove, 53 - Full - circular hole, 6 - Switch mechanism, 61 - Switch module, 611 - Rotating shaft, 62 - Transmission mechanism, 621 - First crank, 6211 - Long slot, 622 - Side plate, 6221 - Second avoidance hole, 623 - Second crank, 6231 - First avoidance hole, 6232 - Second cylinder, 624 - Pressure plate, 6241 - Support pillar, 6242 - Insertion hole, 625 - First spline shaft, 6251 - Third cylinder, 626 - Second spline shaft. Detailed implementation mode

[0027] To make the purpose, technical solution and advantages of this technical solution clearer and more understandable, the following further details this technical solution in combination with the specific implementation mode. It should be understood that these descriptions are only exemplary and do not limit the scope of this technical solution.

[0028] Please refer to Figures 1 - 10 , the utility model provides a technical solution: an isolating switch with an easily adjustable opening force, including a base plate 1, an operating mechanism 2, a reaction mechanism 3, an outer shell 4 and a switch mechanism 6. The operating mechanism 2 and the reaction mechanism 3 are both installed on the front surface of the base plate 1. Both ends of the output shaft 21 are located on the left and right sides of the operating mechanism 2 (the front - back, left - right directions are as Figure 1 shown), and switch mechanisms 6 are provided on both sides of the operating mechanism 2. The operating mechanism 2 includes an output shaft 21 and a cantilever 22. Both ends of the cantilever 22 are connected to the output shaft 21 and the cylindrical pin 23 respectively. The output end of the reaction mechanism 3 can drive the cylindrical pin 23 to move downward, and then drive the output shaft 21 to rotate through the cantilever 22. The outer shell 4 covers the outside of the operating mechanism 2 and the reaction mechanism 3, and a tool hole 41 is provided on the top surface of the outer shell 4. The switch mechanism 6 includes at least one switch module 61. The switch module 61 closest to the operating mechanism 2 is connected to the output shaft 21 through a transmission mechanism 62. When the output shaft 21 rotates, it can change the working state of the switch module 61.

[0029] Please refer to Figures 1 - 2 and Figures 5 - 10 , the reaction mechanism 3 includes a bracket 31, a reinforcing plate 32, an adjusting screw 33, a round nut 34, an adjusting plate 35, a support plate 36, a pin shaft 37, a reaction spring 38 and a spacer block 39. Please refer toFigures 8 - 10 When the present utility model is in the open position, the reaction spring 38 is in the installed state. The supporting plate 36 is subjected to the downward pressure of the reaction spring 38. The pin shaft 37 is stuck at the lower part of the sliding groove 312 inside the bracket 31, restricting the downward movement of the supporting plate 36. The round nut 34 and the adjusting plate 35 are restricted by the adjusting screw 33 and press the reaction spring 38. Use a rod-shaped tool suitable for the adjusting screw 33, pass through the tool hole 41 and the adjusting hole 311 on the top surface of the bracket 31, rotate the adjusting screw 33, drive the round nut 34 and the adjusting plate 35 to move up or down, change the telescopic length of the reaction spring 38, and adjust to the pre-pressure.

[0030] Please refer to Figures 8 - 10 The top of the adjusting screw 33 is arranged in the round hole 321. The top surface of the bracket 31 is provided with an adjusting hole 311. The round hole 321 and the adjusting hole 311 are concentrically arranged. The diameter of the round hole 321 is larger than the diameter of the adjusting hole 311. During the rotation of the adjusting screw 33, the top of the adjusting screw 33 cannot pass through the adjusting hole 311, and the top of the bracket 31 can apply a downward pressure on the top of the adjusting screw 33 to ensure that the reaction spring 38 can be normally compressed.

[0031] Please refer to Figures 5 - 6 In this embodiment, there are two cushion blocks 39 on the outer bottom surface of the supporting plate 36. There are three cantilevers 22, and there is a bushing 24 between two adjacent cantilevers 22. When performing closing, the cantilever 22 rotates upward around the output shaft 21. The cantilever 22 drives the bushing 24 to move upward through the cylindrical pin 23. After the bushing 24 contacts the cushion block 39, it pushes the supporting plate 36 to move upward. The reaction spring 38 is compressed and stores energy. After the disconnector is closed, the output shaft 21 is locked by the operating mechanism 2 and remains in place. The energy stored in the reaction spring 38 also remains. When performing opening, the output shaft 21 is released by the operating mechanism 2, and the energy stored in the reaction spring 38 is also released. By pushing the supporting plate 36 to move downward, the opening force is indirectly increased, so that the present utility model opens. When the present utility model cannot open, by rotating the adjusting screw 33 to move the position of the adjusting plate 35, the reaction spring 38 is further compressed to increase the opening force. Therefore, the present utility model adjusts the magnitude of the opening force according to requirements. When the present utility model cannot close, by rotating the adjusting screw 33 to move the position of the adjusting plate 35, the compression amount of the reaction spring 38 is reduced to increase the closing force.

[0032] Please refer to Figures 5 - 6 and Figures 8 - 10, the bottom of the round nut 34 extends into the inner side of the reaction spring 38, and the outer diameter of the round nut 34 is the same as the inner diameter of the reaction spring 38. The inner bottom surface of the support plate 36 is provided with a first cylinder 361, the top of the first cylinder 361 extends into the inner side of the reaction spring 38, and the diameter of the first cylinder 361 is the same as the inner diameter of the reaction spring 38. The outer circle of the round nut 34 cooperates with the inner circle of the reaction spring 38 to limit the radial position of the top of the reaction spring 38. The outer circle of the first cylinder 361 cooperates with the inner circle of the reaction spring 38 to limit the radial position of the bottom of the reaction spring 38.

[0033] Please refer to Figures 5 - 10 , a limit chute 322 is provided on the side wall of the reinforcing plate 32, and a convex plate 351 is provided on the adjusting plate 35. When the adjusting plate 35 moves up or down, the convex plate 351 slides along the inner wall of the limit chute 322 to ensure that the adjusting plate 35 does not rotate together with the adjusting screw 33.

[0034] Please refer to Figures 1 - 4 , the present utility model further includes two support seats 5, the two support seats 5 are respectively located on both sides of the operating mechanism 2, and the support seat 5 includes a first angle plate 51 and a second angle plate 52. An opening groove 511 is provided on the first angle plate 51, and a semi-circular groove 521 is provided on the second angle plate 52. The first angle plate 51 can straddle the output shaft 21 and be stacked and fixed on the bottom plate 1 with the second angle plate 52. The opening groove 511 and the semi-circular groove 521 jointly enclose a complete circular hole 53, the diameter of the complete circular hole 53 is the same as the diameter of the output shaft 21, the output shaft 21 is arranged in the complete circular hole 53 and is rotatably connected with the support seat 5, and the support seat 5 can assist in restricting the radial wobbling of the output shaft 21.

[0035] Please refer to Figures 1 - 3 and Figure 5, a rotating shaft 611 is provided on the switch module 61. When the number of switch modules 61 on any side of the operating mechanism 2 is greater than one, a second spline shaft 626 is provided between two adjacent switch modules 61. The transmission mechanism 62 includes a first crank 621, a side plate 622, a second crank 623, a pressure plate 624 and a first spline shaft 625. A first crank 621 is welded to each end of the output shaft 21, and the second spline shaft 626 connects the rotating shafts 611 on two adjacent switch modules 61 so that the two rotate synchronously. The first spline shaft 625 is provided in the second avoidance hole 6221 and the first avoidance hole 6231, and penetrates the side plate 622 and the second crank 623. The first spline shaft 625 connects the rotating shaft 611 and the second crank 623 so that they rotate synchronously. The pressure plate 624 is welded to the side plate 622, and the third cylinder 6251 on the first spline shaft 625 is embedded in the socket 6242 on the pressure plate 624 to limit the axial disengagement of the first spline shaft 625. The second crank 623 is restricted between the pressure plate 624 and the side plate 622 and cannot be disengaged axially. A support 6241 is provided at each end of the pressure plate 624, and the two support pillars 6241 limit the rotation of the second crank 623 within a certain angle. The second cylinder 6232 arranged on the second crank 623 penetrates the long hole 6211 on the first crank 621, and the side plate 7 is fixed to the bottom plate 1.

[0036] See also Figures 1 - 3 When the output shaft 21 rotates, the first crank 621 drives the second crank 623 to rotate, and the second crank 623 drives the rotating shaft 611 on the switch module 61 closest to the operating mechanism 2 to rotate through the first spline shaft 625, and then drives the rotating shaft 611 on the subsequent switch module 61 to rotate through the second spline shaft 626. When the rotating shaft 611 rotates, the working state of the switch module 61 is changed.

[0037] See also Figures 1 - 2 , the switch modules 61 on both sides of the operating mechanism 2 are in a translation position relationship, and the side plate 622, the second crank 623, the pressure plate 624 and the first spline shaft 625 are in a mirror position relationship. In this embodiment, two switch modules 61 are provided on one side of the operating mechanism 2 for example. In other embodiments, one, three or four switch modules 61 may be provided on each of the left and right ends according to actual needs.

[0038] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, many changes can be made in the specific implementation methods and application scopes based on the ideas of the present technical content. As long as these changes do not deviate from the concept of the present invention, they all fall within the scope of protection of this patent.

Claims

1. A disconnector with easily adjustable opening force, characterized in that: include: Base plate; An operating mechanism is fixedly arranged on the front surface of the bottom plate; A reaction mechanism, disposed between the top of the operating mechanism and the bottom plate; The operating mechanism comprises: An output shaft, two ends of which are respectively located on the left and right sides of the operating mechanism; A cantilever, one end of which is connected to the middle portion of the rear side of the output shaft, and the other end of which is connected to a cylindrical pin; The reaction force mechanism comprises: A bracket, wherein the bracket is fixedly connected to the base plate; A reinforcing plate, arranged on the inner side of the bracket and fixedly connected to the bracket; An adjusting screw, wherein a circular hole is provided on the top surface of the reinforcing plate, a top of the adjusting screw is arranged in the circular hole, an adjusting hole is provided on the top surface of the bracket, the circular hole is arranged concentrically with the adjusting hole, and a diameter of the circular hole is larger than a diameter of the adjusting hole; A round nut, arranged on the adjusting screw and threadedly connected with the adjusting screw; An adjusting plate, which is sleeved on the outer surface of the round nut and fixedly connected to the round nut; A support plate is arranged on the inner side of the bracket, a pin is respectively arranged at the left and right ends of the support plate, a sliding groove is respectively arranged on the left and right side walls of the bracket, one end of the pin is fixedly connected to the support plate, the other end of the pin extends into the sliding groove and can slide along the inner wall of the sliding groove, and the support plate is located above the cylindrical pin; A reaction spring is arranged on the inner side of the bracket, the top of the reaction spring abuts against the bottom surface of the adjustment plate, and the bottom of the reaction spring abuts against the inner bottom surface of the support plate.

2. The isolating switch with easily adjustable opening force according to claim 1, characterized in that: The adjustment plate is located in the middle of the outer surface of the round nut, the bottom of the round nut extends into the inner side of the reaction spring, and the outer diameter of the round nut is the same as the inner diameter of the reaction spring; A first cylinder is provided on the inner bottom surface of the support plate, the bottom of the first cylinder is fixedly connected to the support plate, the top of the first cylinder extends into the inner side of the reaction spring, and the diameter of the first cylinder is the same as the inner diameter of the reaction spring.

3. The disconnector with easily adjustable opening force according to claim 1, characterized in that: A limiting slide groove is provided on the side wall of the reinforcing plate, and a convex plate is provided on the adjusting plate. The convex plate extends into the limiting slide groove and can slide along the inner wall of the limiting slide groove. The shape of the limiting slide groove matches the shape of the convex plate.

4. The disconnector with easily adjustable opening force according to claim 1, characterized in that: Two pads are fixedly provided on the outer bottom surface of the support plate, and there are three cantilevers, which are arranged at equal intervals. The first ends of the three cantilevers are fixedly connected to the output shaft, and the second ends of the three cantilevers are fixedly connected to the cylindrical pin. A bushing is provided between two adjacent cantilevers, and the bushing is sleeved on the outer surface of the cylindrical pin and is rotatably connected to the cylindrical pin.

5. The disconnector with easily adjustable opening force according to claim 1, characterized in that: It also includes a shell, which is detachably connected to the base plate, the operating mechanism and the reaction mechanism are both arranged inside the shell, and a tool hole is provided on the top surface of the shell, and the tool hole is concentrically arranged with the adjustment hole.

6. The disconnector with easily adjustable opening force according to claim 1, characterized in that: It also includes two support seats, which are respectively located on both sides of the operating mechanism and have mirror-symmetrical structures, and the support seats are fixedly connected to the base plate; The support seat includes a first angle plate and a second angle plate, the first angle plate and the second angle plate are both L-shaped structures, the first angle plate is provided with an open groove, the second angle plate is provided with a semicircular groove, the open groove and the semicircular groove together form a full circular hole, the first angle plate and the second angle plate are fixedly connected, the diameter of the full circular hole is the same as the diameter of the output shaft, the output shaft is arranged in the full circular hole, and is rotatably connected to the support seat.

7. The disconnector with easily adjustable opening force according to claim 1, characterized in that: A switch mechanism is provided on both sides of the operating mechanism, and the switch mechanism includes at least one switch module, and the switch module closest to the operating mechanism is connected to the output shaft through a transmission mechanism; The transmission mechanism comprises: A first crank, wherein a first end of the first crank is fixedly connected to an end of the output shaft, and a second end of the first crank is provided with an elongated hole; a side plate, disposed between the first crank and the switch module closest to the operating mechanism, and fixedly connected to the bottom plate; A second crank is arranged between the first crank and the side plate, a first avoidance hole is arranged in the middle of the second crank, a second cylinder is arranged at one end of the second crank away from the bottom plate, a first end of the second cylinder is fixedly connected to the second crank, and a second end of the second cylinder extends into the elongated hole and can slide along the inner wall of the elongated hole; A pressing plate is arranged between the first crank and the second crank, the pressing plate is arranged obliquely, a pillar is respectively arranged at both ends of the pressing plate, the two ends of the pillar are respectively fixedly connected to the pressing plate and the side plate, and a plug hole is arranged in the middle of the pressing plate; A first spline shaft, a second avoidance hole is provided in the middle of the side plate, the first spline shaft is arranged in the second avoidance hole, a rotating shaft is provided on the switch module, the first end of the first spline shaft is connected to the rotating shaft, the second end of the first spline shaft is provided with a third cylinder, the third cylinder passes through the first avoidance hole, extends into the socket, and can slide along the inner wall of the socket, and the shape of the first avoidance hole matches the shape of the first spline shaft.

8. The disconnector with easily adjustable opening force according to claim 7, characterized in that: When the number of the switch modules on any side of the operating mechanism is greater than one, a second spline shaft is provided between two adjacent switch modules, and two ends of the second spline shaft are respectively connected to the rotating shafts on the two adjacent switch modules.

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