Transmission device of medium-voltage switch mechanism

Abstract

The utility model discloses a transmission device of a medium-voltage switch mechanism, which comprises a mounting plate, an operating shaft, a flywheel shaft, a limiting rod, an output shaft, a spring mounting seat, a spring assembly and a pawl assembly which are mutually combined for use to play a role, a larger mechanism output torque is obtained under the condition of not changing the wire diameter specification of a spring by optimally designing a spring force release angle, and the reliability of the mechanism is improved. A pawl assembly is additionally arranged to ensure that an output rotating shaft and a switch blade do not rotate along with the mechanism when the mechanism is switched on, namely the blade is not stressed, so that arc discharge hazards caused by slow switching on of the blade are avoided, and the matching angle of a notch of an operation cam plate and a notch of an output cam plate and an impact column is over-dead-point design. The spring force release of the spring assembly is provided with a section of idle stroke so as to obtain high initial kinetic energy.

Description

Technical Field

[0001] The utility model relates to the field of switch mechanism transmission, in particular to a medium voltage switch mechanism transmission device. Background Art

[0002] The conventional spring operating mechanism consists of four parts: spring energy storage, closing maintenance, opening maintenance, and opening. The mechanism has nearly 200 parts. The spring operating mechanism controls the closing and opening operations of the circuit breaker by the energy stored by the spring stretching and contraction. The operating energy depends on the energy stored in the spring and has nothing to do with the size of the electromagnetic force. It does not require too large closing and opening currents.

[0003] For example, the international patent with publication number WO2021057521A1 discloses a high-reliability and high-life inflatable cabinet circuit breaker, in which the gearbox is fixed on the housing, the input shaft of the gearbox is connected to the motor and driven by the motor, the energy storage driving shaft is coaxially connected to the output shaft of the gearbox, the energy storage driven shaft is rotatably arranged in the housing, and the energy storage driving shaft and the energy storage driven shaft are provided with mutually meshing gears, the energy storage spring mechanism includes an energy storage spring and an energy storage crank arm, one end of the energy storage spring is fixed to the upper end of the housing, the other end of the energy storage spring is hinged to one end of the energy storage crank arm, and the other end of the energy storage crank arm is fixed to the energy storage driven shaft, and the two ends of the opening and closing transmission mechanism are respectively connected to the energy storage driven shaft and the opening spring mechanism for transmission between the two. This application improves the design of the transmission structure of each mechanism of the circuit breaker, solves the problem of unreasonable excessive damping in the prior art, and thus realizes more than 15,000 times of mechanical life test of the circuit breaker mechanism.

[0004] In summary, the existing medium voltage switch mechanism transmission device still has many disadvantages, which are summarized as follows:

[0005] ① How to ensure that when the mechanism is closed, that is, when the blade is not under force, the output shaft and the switch blade do not rotate;

[0006] ② How to avoid arcing hazards caused by slow blade closing;

[0007] ③How to obtain a larger mechanism output torque without changing the spring wire diameter specifications and ensure that the switch can be opened and closed reliably. Utility Model Content

[0008] In view of the deficiencies in the prior art, the utility model provides a medium voltage switch mechanism transmission device to solve the above problems.

[0009] In order to achieve the above objectives, the utility model is implemented through the following technical solutions.

[0010] A medium-voltage switch mechanism transmission device comprises a mounting plate, an operating shaft, a flywheel shaft, a limiting rod, an output shaft, a spring mounting seat, a spring assembly, and a pawl assembly, wherein one side of the operating shaft is connected to the mounting plate, and the other side is provided with an operating cam plate, and notches are provided on both sides of the operating cam plate, and flywheel plates are provided on both sides of the flywheel shaft and are also connected to one end of the spring assembly, and notches are provided on both sides of the flywheel plate and a protrusion is provided on the edge, and the limiting rod is fixed to the mounting plate, and a connecting column is provided on one side of the output shaft, and the connecting column passes through the inside of the flywheel shaft and is limitedly connected to the operating shaft, an output cam plate is provided in the middle position of the output shaft, and the other side of the output shaft is connected to the mounting plate, notches are provided on both sides of the output cam plate, and a card slot is provided on the top, the pawl assembly is fixed to the mounting plate, and the pawl assembly corresponds to the protruding position of the flywheel plate, and the card slot of the output cam plate corresponds to the working position of the pawl assembly Correspondingly, the other end of the spring assembly is connected to the spring mounting seat, and both ends of the spring mounting seat are movably connected to the mounting plate. The notches on both sides of the operating cam plate, the notches on both sides of the flywheel plate, and the notches on both sides of the output cam plate are adapted to the shape of the limit rod. The flywheel plate is also provided with an impact column adapted to the shape of the three notches. By optimizing the design of the spring force release angle, a larger mechanism output torque is obtained without changing the spring wire diameter specification, thereby ensuring that the switch can be reliably opened and closed. By adding a pawl assembly, it is ensured that when the mechanism is closed, that is, when the blade is not under force, the output shaft and the switch blade do not rotate, thereby avoiding the arcing hazard caused by slow closing of the blade. The notches of the operating cam plate and the output cam plate are designed with an angle of over-dead point with the impact column, that is, the spring force release of the spring assembly is provided with a section of idle stroke to obtain a higher initial kinetic energy.

[0011] Preferably, the operating shaft and the mounting plate are connected to each other via a bearing.

[0012] Preferably, a limit pin and a mounting hole are provided on one side where the operating shaft is connected to the mounting plate.

[0013] Preferably, the connecting column of the output shaft is in the shape of a cylindrical shaft with a hexagonal groove milled inside and is limitedly connected to the operating shaft.

[0014] Preferably, the mounting plate includes a front mounting plate and a rear mounting plate, and the positions of the mounting plates correspond to each other.

[0015] Preferably, both ends of the spring mounting seat are connected to the mounting plate through bearings and can rotate in the bearings.

[0016] Preferably, the pawl assembly includes a pawl column, a pawl pin, a return spring, and a pawl body.

[0017] Preferably, the pawl column is fixed on the rear mounting plate, the pawl pin is fixed on the pawl column and defines the position of the return spring, and the return spring is sleeved on the pawl column.

[0018] Preferably, the pawl main body includes a pawl convex plate and a pawl hook body.

[0019] Preferably, the ratchet cam plate corresponds to the raised position of the flywheel plate, and the ratchet hook body corresponds to the slot of the output cam plate.

[0020] Compared with the prior art, the utility model discloses a medium voltage switch mechanism transmission device, including a mounting plate, an operating shaft, a flywheel shaft, a limit rod, an output shaft, a spring mounting seat, a spring assembly, and a pawl assembly, which are used in combination with each other to play a role.

[0021] ①By optimizing the design of the spring force release angle of the spring assembly, a larger mechanism output torque can be obtained without changing the spring wire diameter specification, ensuring that the switch can be opened and closed reliably;

[0022] ② By adding a ratchet assembly, it is ensured that when the mechanism is closed, that is, when the blade is not under force, the output shaft and the switch blade do not rotate, thus avoiding arcing hazards caused by slow closing of the blade;

[0023] ③ The notches of the operating cam plate and the output cam plate are designed to cooperate with the impact column at an angle past the dead point, that is, the spring force release of the spring assembly is provided with an idle stroke to obtain a higher initial kinetic energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the medium voltage switch mechanism transmission device of the utility model;

[0025] Figure 2 It is a structural schematic diagram of the opening and closing working states of the utility model;

[0026] Figure 3 It is a cutaway schematic directional diagram of the medium voltage switch mechanism transmission device of the utility model;

[0027] Figure 4 It is a cross-sectional schematic diagram of the medium voltage switch mechanism transmission device of the utility model;

[0028] Figure 5 It is a structural schematic diagram of the pawl assembly of the utility model;

[0029] Figure 6 This is a schematic diagram of the structure of the output shaft of the utility model;

[0030] Figure 7 This is a schematic diagram of the structure of the flywheel shaft of the utility model;

[0031] Figure 8 It is a structural schematic diagram of the operating shaft of the utility model. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0033] A medium voltage switch mechanism transmission device, including a mounting plate, an operating shaft 3, a flywheel shaft 4, a limiting rod 5, an output shaft 6, a spring mounting seat 9, a spring assembly 10, and a pawl assembly 11, wherein one side of the operating shaft 3 is connected to the mounting plate, and the other side is provided with an operating cam plate, and notches are provided on both sides of the operating cam plate, and flywheel plates are provided on both sides of the flywheel shaft 4, and are also connected to one end of the spring assembly 10, and notches are provided on both sides of the flywheel plate, and protrusions are provided on the edges, and the limiting rod 5 is fixed on the mounting plate, and a connecting column is provided on one side of the output shaft 6, and the connecting column passes through the inside of the flywheel shaft 4 and is limitedly connected to the operating shaft 3, and an output cam is provided in the middle of the output shaft 6 The output cam plate is provided with notches on both sides and a card slot on the top. The pawl assembly 11 is fixed on the mounting plate, and the pawl assembly 11 corresponds to the raised position of the flywheel plate. The card slot of the output cam plate corresponds to the working position of the pawl assembly 11. The other end of the spring assembly 10 is connected to the spring mounting seat 9. Both ends of the spring mounting seat 9 are movably connected to the mounting plate. The notches on both sides of the operating cam plate, the notches on both sides of the flywheel plate, and the notches on both sides of the output cam plate are matched with the shape of the limit rod 5. The flywheel plate is also provided with an impact column matched with the shape of the three notches.

[0034] The operating shaft 3 and the mounting plate are connected to each other via a bearing, and a stop pin and a mounting hole are provided on one side of the operating shaft 3 connected to the mounting plate. The connecting column of the output shaft 6 is in the shape of a hexagonal groove milled in a cylindrical shaft and is limitedly connected to the operating shaft 3. The operating shaft 3 is also provided with a shape matching the shape of the connecting column of the output shaft 6, which is a hexagonal groove milled in a cylindrical shaft. Of course, any shape and connection form that can achieve a limited connection and does not affect the rotation of the flywheel shaft 4 can be used in this solution.

[0035] The mounting plate includes a front mounting plate 2 and a rear mounting plate 7, and their positions correspond to each other. Both ends of the spring mounting seat 9 are connected to the mounting plate through bearings and can rotate in the bearings. The pawl assembly 11 includes a pawl column 111, a pawl pin 112, a return spring 113, and a pawl body 114. The pawl column 111 is fixed on the rear mounting plate 7, the pawl pin 112 is fixed on the pawl column 111, and limits the position of the return spring 113. The return spring 113 is sleeved on the pawl column 111, and the pawl body 114 includes a pawl convex plate 1141 and a pawl hook body 1142. The pawl convex plate 1141 corresponds to the raised position of the flywheel plate, and the pawl hook body 1142 corresponds to the card slot of the output cam plate.

[0036] The operating shaft 3, the flywheel shaft 4, the output shaft 6, and the bearing are nested to ensure the overall transmission strength and coaxiality. A limit pin and a mounting hole are provided on one side of the operating shaft 3 for connecting an external operating handle. Notches are provided on both sides of the operating cam plate to drive the rotation and stop of the flywheel shaft 4. There are impact columns on both sides of the flywheel shaft 4 for meshing and linkage with the notches on the operating cam plate and the output cam plate respectively. The flywheel plate of the flywheel shaft 4 is provided with notches. When the flywheel shaft 4 rotates, the two ends of the notch can be respectively clamped on the limit rod 5, corresponding to the two position states of the switch. The ratchet hook body 1142 is used to hook the clamping groove of the output cam plate to prevent the output shaft 6 from rotating during the closing operation, that is, when the output shaft 6 rotates clockwise. A protrusion is provided on the edge of the flywheel plate to lift the ratchet convex plate 1141 before the spring force is released. The matching angle of the output cam plate notch and the impact column is designed to be past the dead point, that is, the spring force release of the spring assembly 10 is provided with a section of idle travel to obtain a higher initial kinetic energy.

[0037] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0038] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0039] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A medium voltage switch mechanism transmission device, characterized in that: The invention comprises a mounting plate, an operating shaft (3), a flywheel shaft (4), a limiting rod (5), an output shaft (6), a spring mounting seat (9), a spring assembly (10), and a pawl assembly (11); one side of the operating shaft (3) is connected to the mounting plate, and the other side is provided with an operating cam plate, and notches are provided on both sides of the operating cam plate; both sides of the flywheel shaft (4) are provided with flywheel plates, which are also connected to one end of the spring assembly (10); both sides of the flywheel plates are provided with notches and edges are provided with protrusions; the limiting rod (5) is fixed on the mounting plate; one side of the output shaft (6) is provided with a connecting column, and the connecting column passes through the inside of the flywheel shaft (4) and is limitedly connected to the operating shaft (3); the middle position of the output shaft (6) is provided with an output protrusion The output cam plate is provided with notches on both sides and a slot on the top. The pawl assembly (11) is fixed on the mounting plate, and the pawl assembly (11) corresponds to the protruding position of the flywheel plate. The slot of the output cam plate corresponds to the working position of the pawl assembly (11). The other end of the spring assembly (10) is connected to the spring mounting seat (9). Both ends of the spring mounting seat (9) are movably connected to the mounting plate. The notches on both sides of the operating cam plate, the notches on both sides of the flywheel plate, and the notches on both sides of the output cam plate are compatible with the shape of the limit rod (5). The flywheel plate is also provided with an impact column compatible with the shape of the three notches.

2. The medium voltage switch mechanism transmission device according to claim 1, characterized in that: The operating shaft (3) and the mounting plate are connected to each other via a bearing.

3. The medium voltage switch mechanism transmission device according to claim 1, characterized in that: A limit pin and a mounting hole are provided on one side of the operating shaft (3) connected to the mounting plate.

4. The medium voltage switch mechanism transmission device according to claim 1, characterized in that: The connecting column of the output shaft (6) is in the shape of a cylindrical shaft with a hexagonal groove milled inside and is position-limitedly connected to the operating shaft (3).

5. The medium voltage switch mechanism transmission device according to claim 1, characterized in that: The mounting plate comprises a front mounting plate (2) and a rear mounting plate (7), and the positions of the mounting plates correspond to each other.

6. The medium voltage switch mechanism transmission device according to claim 1, characterized in that: The two ends of the spring mounting seat (9) are connected to the mounting plate through bearings and can rotate in the bearings.

7. The medium voltage switch mechanism transmission device according to claim 1, characterized in that: The pawl assembly (11) comprises a pawl column (111), a pawl pin (112), a return spring (113), and a pawl body (114).

8. The medium voltage switch mechanism transmission device according to claim 7, characterized in that: The pawl column (111) is fixed on the rear mounting plate (7), the pawl pin (112) is fixed on the pawl column (111) and limits the position of the return spring (113), and the return spring (113) is sleeved on the pawl column (111).

9. The medium voltage switch mechanism transmission device according to claim 7, characterized in that: The ratchet body (114) comprises a ratchet convex plate (1141) and a ratchet hook body (1142).

10. The medium voltage switch mechanism transmission device according to claim 9, characterized in that: The ratchet convex plate (1141) corresponds to the protruding position of the flywheel plate, and the ratchet hook body (1142) corresponds to the slot of the output cam plate.

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