Floor switch transmission with rolling guide mechanism

Abstract

The utility model discloses a floor switch transmission device with rolling guide mechanism, including frame, modularization elastic operating mechanism, vacuum arc extinguish chamber, guide component and transmission component, and guide component is fixed on the guide plate and reinforced guide plate of frame, and both parallelly arranged and be provided with linear guide slot along Y axle direction, transmission component is by transmission crank, first transmission connecting plate, second transmission connecting plate, third transmission connecting plate and connecting block composition, transmission crank input end connects modularization elastic operating mechanism, and output end is hinged first transmission connecting plate, first transmission connecting plate other end hinged second transmission connecting plate and the junction node of third transmission connecting plate, third transmission connecting plate end fixed connecting block, connecting block is nested in linear guide slot, and connecting block connects vacuum arc extinguish chamber dynamic end, and transmission component converts the rotary motion of modularization elastic operating mechanism into the linear motion of connecting block along Y axle. The utility model improves the mechanical characteristic matching degree of mechanism and load, reduces the operation impact and the closing work.

Description

Technical Field

[0001] This utility model relates to the technical field of floor switch transmission devices, and in particular to a floor switch transmission device with a rolling guide mechanism. Background Technology

[0002] With the nation's efforts to build a robust power grid and the rapid development of new energy sectors, the market demand for 40.5kV switches is increasing daily. The ZN85 floor-mounted switch, as a mature product in the 40.5kV field, is receiving increasing attention from switch manufacturers, who are continuously iterating and updating their products. This patent optimizes the mainstream drive scheme for this product, solving the problems of existing solutions while reducing the overall cost of the product.

[0003] Currently, the mainstream drive solution for ZN85 floor-mounted switches uses the modular mechanism of 12kV switches, namely the VSH type. This simplifies the drive by increasing the closing power of the modular mechanism, thus driving the load vacuum interrupter VI. This solution is simple and direct, but it has the following problems:

[0004] First, the modular VSH type of 12kV switch itself has the problem of mismatch between the mechanical characteristics of the mechanism and transmission and the load. For example, the closing and opening speeds are reversed, the bounce exceeds the standard, the opening rebound exceeds the standard, and the motion characteristics are inconsistent with the requirements of the vacuum interrupter. This problem also exists in the ZN85 floor-mounted switch.

[0005] Secondly, in order to adapt to the increased operating power of the 40.5kV switch, the closing spring of the VSH type of 12kV switch spring-operated mechanism was simply added. This caused the original modular spring-operated mechanism VSH type to exceed the design service envelope, resulting in the mechanical life rating of the spring-operated mechanism itself and the ZN85 switch being reduced from M2 to M1.

[0006] Third, the ZN85 floor switch has a relatively long distance between its mechanism and the load. As a result, some parts in the transmission components are large in size. Currently, welded components are often used, which leads to poor consistency and low strength of the parts or components, affecting the performance and lifespan of the switch and resulting in poor reliability.

[0007] The above three issues not only affect the no-load mechanical characteristics of the ZN85 switch, but also its opening and closing performance under actual load and its reliability during frequent operation.

[0008] See Figure 1 The existing ZN85 switch has a transmission design consisting of a modular spring-operated mechanism 2. ， via transmission crank 6 ， Rotate clockwise by a certain angle to drive the second transmission connecting plate 5 ， Moving upwards, the first transmission connecting plate 4 ， Rotate counterclockwise to drive connecting block 7， It makes a counterclockwise arc motion, thereby driving the load vacuum interrupter VI to make an arc motion around the Y-axis.

[0009] The actual situation is that the load requires linear motion along the Y-axis, with specific mechanical parameter requirements for speed, time, bounce, overshoot, and rebound. The load is a precision conductive and arc-extinguishing element, and the switch mechanism and transmission design must meet these requirements. Otherwise, the electrical performance of the load will be affected, impacting its short-circuit breaking and short-circuit making performance. Furthermore, extensive data analysis reveals that the mechanical characteristics of this transmission scheme are not ideal, specifically:

[0010] 1) The closing and opening speeds of the switch are excessive, and the switch is upside down.

[0011] 2) The closing time of the switch is too short and the opening time is too long, both exceeding the standard allowable range.

[0012] 3) The bounce time exceeded the standard and failed to meet the requirement of not exceeding 2 milliseconds.

[0013] 4) The overtravel of the switch cannot meet the standard range of 6±2 mm. When the overtravel is at the upper limit of 8 mm, the switch cannot be closed in place.

[0014] 5) Due to the blind enlargement of the closing spring, the mechanical life of the mechanism and the switch as a whole cannot meet the basic requirement of 10,000 cycles for M2 level.

[0015] These situations all violate the basic performance requirements of switches. Utility Model Content

[0016] The technical problem to be solved by this utility model is: in order to overcome the shortcomings of the existing technology, a floor switch transmission device with a rolling guide mechanism is provided. Under the premise of keeping the overall design of ZN85 switch unchanged, the mechanical characteristics matching degree between the mechanism and the load is significantly improved by optimizing the design of the transmission components, the operating impact and closing power are reduced, the mechanical life of the switch reaches the M2 level, and the overall electrical performance, consistency and reliability of the machine are improved.

[0017] The technical solution adopted by this utility model to solve its technical problem is as follows: a floor switch transmission device with a rolling guide mechanism, including a frame, a modular spring-operated mechanism and a vacuum interrupter, and also including a guide assembly and a transmission assembly. The guide assembly is fixed to a guide plate and a reinforcing guide plate on the frame, which are arranged in parallel and have a linear guide groove along the Y-axis. The transmission assembly consists of a transmission crank arm, a first transmission connecting plate, a second transmission connecting plate, a third transmission connecting plate and a connecting block. The input end of the transmission crank arm is connected to the output shaft of the modular spring-operated mechanism, and the output end of the transmission crank arm is hinged to the first transmission connecting plate. The other end of the first transmission connecting plate is hinged to the junction of the second and third transmission connecting plates. The end of the third transmission connecting plate is fixed to the connecting block. The connecting block is nested in the linear guide groove of the guide plate and the reinforcing guide plate, and the output end of the connecting block is connected to the moving end of the vacuum interrupter through a spacer. The transmission assembly converts the rotational motion of the modular spring-operated mechanism into the linear motion of the connecting block along the Y-axis.

[0018] To address the issues of poor part consistency, low strength, and low assembly efficiency in the original welded transmission components, this invention further specifies that the first, second, and third transmission connecting plates are all sheet metal stamping parts. The stamping process ensures the dimensional accuracy of the parts and eliminates welding deformation; the work hardening properties of sheet metal improve the rigidity of the parts, solving the problem of insufficient strength in the original welded components.

[0019] To eliminate the problems of high energy loss, rapid component wear, and short mechanical life caused by the original sliding friction, this utility model further specifies that the inner wall of the linear guide groove of the reinforced guide plate and the spacer of the connecting block form a rolling fit structure, and the contact surface is a combination structure of arc-shaped convex surface and plane. The combination structure of arc-shaped convex surface and plane converts sliding friction into rolling friction, reducing the closing power required to drive the load to 120J or less, significantly reducing the wear rate of the mechanism, achieving a mechanical life of M2 level, reducing the operational impact of the arc-extinguishing chamber, significantly improving the electrical life, and ensuring minimal deviation of the Y-axis linear motion by the rolling guide.

[0020] To fundamentally address the core contradictions of the original transmission scheme, namely inverted mechanical characteristics and overtravel loss of control, this utility model further specifies that the rod length ratio of the first, second, and third transmission connecting plates satisfies the following condition: when the transmission crank arm rotates 35° to 45°, the drive connecting block generates a linear displacement of 6±2 mm. The opening speed is greater than the closing speed, the parameters match the arcing requirements, displacement stability is improved, and bounce suppression is superior to the standard.

[0021] The beneficial effects of this utility model are:

[0022] 1. Maintain the overall design of the ZN85 floor-standing switch to ensure compatibility with the existing power system;

[0023] Second, by optimizing the transmission lever and designing the rolling friction, the closing power of the modular spring-operated mechanism VSH type is reduced, significantly lowering the cost of the mechanism and the entire machine; simultaneously achieving:

[0024] 1) The mechanical characteristics have been fundamentally improved, eliminating defects such as speed inversion, time parameters, and overtravel runaway;

[0025] 2) Electrical performance assurance, achieving a high degree of dynamic matching between the motion characteristics of the arc-extinguishing chamber and the operating mechanism, ensuring that the switch meets the full-condition breaking performance requirements under rated operating parameters;

[0026] 3) Breakthrough in mechanical life, achieving M2 level through 30,000 to 80,000 tests;

[0027] Third, the use of mature sheet metal stamping and pressure riveting design processes has improved product performance, consistency, and production efficiency, while also reducing the manufacturing cost of switches. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a structural schematic diagram of the existing ZN85 floor-mounted switch drive device.

[0030] Figure 1 The label in is: 1 ， 1. Framework; 2. ， Modular spring-loaded mechanism; 3 ， 1. Tripping limit switch; 4. ， 1. First transmission connecting plate; 5 ， 1. Second transmission connecting plate; 6 ， 7. Drive crank arm; ， , connecting block.

[0031] Figure 2 This is a schematic diagram of the structure of the floor switch transmission device with rolling guide mechanism of this utility model.

[0032] The labels in the diagram are: 1. Frame; 2. Modular spring-loaded mechanism; 3. Opening limit switch; 4. Transmission crank arm; 5. Third transmission connecting plate; 6. Fourth transmission connecting plate; 7. Fifth transmission connecting plate; 8. Second connecting block; 9. Reinforcing guide plate; 10. Guide plate. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0034] See Figure 2 This utility model discloses a floor switch transmission device with a rolling guide mechanism, comprising a frame 1, a modular spring-operated mechanism 2, a tripping limit 3, and a vacuum interrupter. The modular spring-operated mechanism 2 is of type VSH, and the tripping limit 3 is an oil-buffered type. The floor switch transmission device also includes a guide assembly and a transmission assembly. The guide assembly consists of a guide plate 10 and a reinforcing guide plate 9 fixed to the frame 1, arranged parallel to each other and having a linear guide groove along the Y-axis. The transmission assembly comprises a transmission crank arm 4, a first transmission connecting plate 5, a second transmission connecting plate 6, a third transmission connecting plate 7, and a connecting block 8.

[0035] The transmission crank arm 4 has its input end connected to the output shaft of the modular spring-operated mechanism 2, and its output end hinged to the first transmission connecting plate 5. The other end of the first transmission connecting plate 5 is hinged to the junction of the second transmission connecting plate 6 and the third transmission connecting plate 7. A connecting block 8 is fixed to the end of the third transmission connecting plate 7. The connecting block 8 is nested within the linear guide groove of the guide plate 10 and the reinforcing guide plate 9, and its output end is connected to the moving end of the vacuum interrupter via a spacer. The transmission assembly converts the rotational motion of the modular spring-operated mechanism 2 into the linear motion of the connecting block 8 along the Y-axis. This utility model's floor switch transmission device maintains the overall design of the ZN85 floor switch, including its shape and mechanism layout, and will not affect the use of existing switches, such as assembly, testing, cabinet fitting, operation, packaging, and transportation. The optimized design of the transmission assembly makes the output curve of the modular spring-operated mechanism 2 more closely match the motion curve of the load, resulting in more reasonable mechanical characteristics of the ZN85 switch. The load is the vacuum interrupter VI. Simultaneously, the load can fully utilize its opening and closing performance, improving the electrical performance of the switch. By optimizing the transmission components, the energy output of the modular spring-operated mechanism 2 is made more reasonable and smoother, while the operational impact on the load is reduced. This optimization not only reduces the closing power of the mechanism but also improves the operational impact on the mechanism, transmission components, load, and frame 1, thereby increasing the overall mechanical life and reliability of the switch. The mechanical life of the switch can reach the M2 level. Adopting a modular design approach, some parts of the transmission link are combined into complete components through sheet metal stamping and pressure riveting processes, improving the consistency of parts and assembly, the efficiency of switch assembly and inspection, and the overall consistency and reliability of the switch.

[0036] Preferably, the first transmission connecting plate 5, the second transmission connecting plate 6, and the third transmission connecting plate 7 are all sheet metal stamping parts, and are assembled with the connecting block 8 into a modular assembly through a pressure riveting process. The stamping process ensures the dimensional accuracy of the parts and eliminates welding deformation; the work hardening characteristics of sheet metal improve the rigidity of the parts, solving the problem of insufficient strength in the original welded parts.

[0037] Preferably, the inner wall of the linear guide groove of the reinforced guide plate 9 and the spacer of the connecting block 8 form a rolling fit structure, and the contact surface is a combination of an arc-shaped convex surface and a flat surface. The combination of the arc-shaped convex surface and the flat surface converts sliding friction into rolling friction, reducing the closing power required to drive the load to 120J or less, significantly reducing the wear rate of the mechanism, achieving a mechanical life of M2 level, reducing the operational impact of the arc-extinguishing chamber, significantly improving electrical life, and ensuring minimal deviation in the linear motion of the Y-axis through rolling guidance.

[0038] Preferably, the length ratio of the first transmission connecting plate 5, the second transmission connecting plate 6, and the third transmission connecting plate 7 satisfies the following condition: when the transmission crank arm 4 rotates from 35° to 45°, the drive connecting block 8 generates a linear displacement of 6±2 mm. This results in a greater opening speed than the closing speed, matching the arcing requirements, improved displacement stability, and better bounce suppression than the standard.

[0039] Preferably, the closing spring of the modular spring-operated mechanism 2 has an energy storage value of no more than 120J and a mechanical life of no less than 10,000 cycles.

[0040] This utility model addresses the problems of existing switches by systematically optimizing the transmission components and related parts or components of the switch, specifically as follows: ① Frame 1 is optimized by adding a guide plate 10 and a reinforcing guide plate 9, enabling the connecting block 8 to move linearly along the Y-axis, i.e., the load's motion axis. In addition to its guiding function, the reinforcing guide plate 9, through its combination with the connecting block 8 and the attached spacer, transforms sliding contact into rolling contact, reducing the coefficient of friction, minimizing wear on parts, lowering the drive energy requirement, and improving the mechanical life of the transmission components, mechanism, and switch. ② The first transmission connecting plate 5, the second transmission connecting plate 6, and the third transmission connecting plate 7 form a linkage transmission assembly. The modular spring-loaded mechanism 2, through the transmission crank arm 4, rotates clockwise by a certain angle, driving the first transmission connecting plate upwards. The second transmission connecting plate 6 rotates counterclockwise, driving the third transmission connecting plate 7 and the connecting block 8 to move linearly along the Y-axis along the slots of the guide plate 10 and the reinforcing guide plate 9, thereby driving the load vacuum interrupter VI to move linearly along the Y-axis. This new transmission component design, which saves effort, changes torque, and reduces friction, makes the energy output of the modular spring-loaded mechanism 2 (VSH type) more rational and smooth, while reducing the operational impact on the load vacuum interrupter VI. The components of the new transmission component include the first transmission connecting plate 5, the second transmission connecting plate 6, the third transmission connecting plate 7, and the connecting block 8. The first transmission connecting plate 5, the second transmission connecting plate 6, and the third transmission connecting plate 7 are all sheet metal stamping parts. By employing mature sheet metal stamping and pressure riveting processes, they are combined with the connecting block 8 to form a complete assembly, improving the consistency of parts and assembly, the efficiency of the overall switch assembly and inspection, and the consistency and reliability of the entire switch.

[0041] This utility model discloses a floor-mounted switch transmission device with a rolling guide mechanism, maintaining the overall design of the ZN85 floor-mounted switch to ensure compatibility with existing power systems. Through optimized transmission levers and rolling friction design, the closing power of the modular spring-operated mechanism 2 (VSH type) is reduced, significantly lowering the cost of the mechanism and the entire unit. Simultaneously, it achieves: fundamentally improved mechanical characteristics, eliminating speed inversion, time parameter issues, and overtravel runaway defects; guaranteed electrical performance, achieving a high degree of dynamic matching between the arc-extinguishing chamber's motion characteristics and the operating mechanism, ensuring the switch meets all-condition breaking performance requirements under rated operating parameters; and a breakthrough in mechanical life, achieving M2 level through 30,000 to 80,000 cycles, comparable to ABB's VD4-AF switch. The use of mature sheet metal stamping and pressure riveting design processes improves product performance, consistency, and production efficiency, while also reducing switch manufacturing costs.

[0042] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A floor switch transmission device with a rolling guide mechanism, comprising a frame (1), a modular spring-operated mechanism (2), and a vacuum interrupter, characterized in that: It also includes guide components and transmission components. The guide assembly is fixed to the guide plate (10) and the reinforcing guide plate (9) on the frame (1). The two are arranged in parallel and have a straight guide groove along the Y-axis. The transmission assembly consists of a transmission crank arm (4), a first transmission connecting plate (5), a second transmission connecting plate (6), a third transmission connecting plate (7), and a connecting block (8); The input end of the transmission crank arm (4) is connected to the output shaft of the modular spring mechanism (2), and the output end of the transmission crank arm (4) is hinged to the first transmission connecting plate (5); the other end of the first transmission connecting plate (5) is hinged to the junction of the second transmission connecting plate (6) and the third transmission connecting plate (7); the end of the third transmission connecting plate (7) is fixed to the connecting block (8); the connecting block (8) is nested in the straight guide groove of the guide plate (10) and the reinforcing guide plate (9), and the output end of the connecting block (8) is connected to the moving end of the vacuum interrupter through a spacer. The transmission assembly converts the rotational motion of the modular spring mechanism (2) into the linear motion of the connecting block (8) along the Y-axis.

2. The floor switch transmission device with rolling guide mechanism as described in claim 1, characterized in that: The first transmission connecting plate (5), the second transmission connecting plate (6), and the third transmission connecting plate (7) are all sheet metal stamping parts.

3. The floor switch transmission device with rolling guide mechanism as described in claim 1, characterized in that: The inner wall of the straight guide groove of the reinforced guide plate (9) and the spacer of the connecting block (8) form a rolling fit structure, and the contact surface is a combination structure of arc-shaped convex surface and plane.

4. The floor switch transmission device with rolling guide mechanism as described in claim 1, characterized in that: The rod length ratio of the first transmission connecting plate (5), the second transmission connecting plate (6), and the third transmission connecting plate (7) satisfies the following condition: when the transmission crank arm (4) rotates from 35° to 45°, the drive connecting block (8) generates a linear displacement of 6±2 mm.

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