Opening and closing switching mechanism and isolating switch

Abstract

The utility model relates to an opening and closing switching mechanism and an isolating switch, which are characterized in that gears distributed in an arc shape on a turntable are matched with related structures of a sliding block, and when a main shaft rotates, the rotation motion can be accurately converted into the linear motion of the sliding block through gear engagement, so that error accumulation in the motion process is reduced; the sliding block is internally provided with a containing cavity matched with the rotary disc in shape, a gap is reserved between the containing cavity and the rotary disc, on one hand, the rotary disc is allowed to rotate smoothly in the containing cavity, on the other hand, the gap can play a certain buffering role, the main shaft penetrates through an insertion hole of the sliding block, and the two ends of the main shaft extend to the outside. The turntable is arranged in the accommodating cavity in the sliding block, so that the whole opening and closing switching mechanism realizes complex functions in a limited space, is convenient to install and arrange in equipment such as an isolating switch and the like, and improves the space utilization rate.

Description

Technical Field

[0001] This utility model relates to the field of disconnecting switch technology, and in particular to a switching mechanism and a disconnecting switch. Background Technology

[0002] In power systems, disconnect switches are critical equipment for ensuring the safe and stable operation of the system. The performance of their opening and closing switching mechanisms is paramount. However, existing opening and closing switching mechanisms have significant shortcomings in design and application. Regarding operational accuracy, some mechanisms suffer from design flaws in the transmission structure, leading to accumulated errors during the transition from rotary to linear motion. This results in deviations in the opening and closing positions, affecting the reliability of power supply. In terms of operational stability, uneven gear meshing causes impact vibrations during mechanism operation, accelerating component wear, shortening equipment lifespan, and interfering with other equipment in the power system, threatening stable system operation. As power equipment evolves towards miniaturization and integration, the requirements for space utilization of opening and closing switching mechanisms increase. However, existing mechanisms are complex in structure and large in size, making it difficult to achieve complex functions within limited space, posing challenges to the installation layout of disconnect switches and other equipment. Furthermore, the lack of an effective fault early warning mechanism is a prominent problem. Equipment failures are difficult to detect and handle in a timely manner, easily leading to the escalation of the fault and causing more serious consequences. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a high-precision, high-stability, high-space-utilization and high-safety switching mechanism and disconnecting switch.

[0004] In a first aspect, this utility model provides a switching mechanism for opening and closing circuits, including a housing. The housing contains a main shaft assembly and a slider assembly. The main shaft assembly includes a main shaft and a turntable sleeved on the main shaft. Gears are provided on the turntable, arranged in an arc around the turntable. The slider assembly includes a slider with a insertion hole corresponding to the main shaft. A receiving cavity for accommodating the turntable is provided inside the slider. The main shaft passes through the insertion hole, and both ends of the main shaft extend outside the slider assembly. The portion of the main shaft on which the turntable is mounted is located within the receiving cavity of the slider assembly. The shape of the receiving cavity is adapted to the turntable, and a gap is provided between the inner wall of the receiving cavity and the outer wall of the turntable. The gear portion of the turntable protrudes outside the receiving cavity.

[0005] The beneficial effects of the above structure are as follows: through the cooperation of the gears distributed in an arc on the turntable and the related structure of the slider, the rotational motion can be accurately converted into the linear motion of the slider when the main shaft rotates, reducing the accumulation of errors during the motion process and ensuring the accuracy of the opening and closing switching mechanism. The slider has a receiving cavity that matches the shape of the turntable, and there is a gap between the two. This design allows the turntable to rotate smoothly in the receiving cavity, and the gap can play a certain buffering role. The main shaft passes through the insertion hole of the slider and extends to the outside at both ends. The turntable is installed in the receiving cavity inside the slider, so that the entire opening and closing switching mechanism can realize complex functions in a limited space, which is convenient for installation and layout in equipment such as disconnect switches and improves space utilization.

[0006] This utility model further includes a gear chain mounted on the slider assembly. The gear chain has evenly distributed, linearly arranged gear grooves that mesh with gears on a turntable. The evenly distributed, linearly arranged gear grooves mesh with the gears on the turntable, ensuring continuous and stable engagement between the gears and gear grooves when the main shaft rotates. This uniform meshing avoids impacts and vibrations caused by uneven gear engagement, thus guaranteeing the smooth operation of the opening and closing switching mechanism.

[0007] This utility model is further configured with a housing comprising an outer shell, a housing cover mounted on the outer shell, and an upper cover disposed on the combined structure of the outer shell and the housing cover. The outer surface of the housing cover is respectively provided with a closing positioning groove and a closing positioning groove. The housing adopts a modular design, composed of an outer shell, a housing cover, and an upper cover, facilitating independent processing and debugging of each component, reducing assembly complexity. The closing and opening positioning grooves on the outer surface of the housing cover provide precise guidance for the slider. Simultaneously, the positioning grooves limit the slider's range of motion, preventing component interference and improving the accuracy and reliability of the closing and opening operations.

[0008] This utility model is further configured such that the gear on the turntable meshes with the gear groove on the gear chain. When the main shaft rotates clockwise, the meshing action of the gear and the gear groove drives the slider to move linearly along the closing positioning groove on the housing cover, and the turntable rotates to the closing position. When the main shaft rotates counterclockwise, the meshing action of the gear and the gear groove drives the slider to move linearly along the opening positioning groove on the housing cover, and the turntable rotates to the opening position. The gears on the turntable mesh tightly with the gear slots on the gear chain, forming a reliable transmission structure. When the main shaft rotates clockwise, this meshing action converts the rotational motion into the linear motion of the slider. The slider moves smoothly along the closing positioning groove on the housing cover, thereby driving the turntable to rotate to the closing position, ensuring that the disconnecting switch can be accurately closed. Similarly, when the main shaft rotates counterclockwise, the meshing of the gears and gear slots comes into play again, driving the slider to move linearly along the opening positioning groove on the housing cover, causing the turntable to rotate to the opening position, realizing the accurate opening of the disconnecting switch. This ensures the accuracy and reliability of the opening and closing operations, effectively improving the operational safety of the equipment.

[0009] This utility model is further configured to include a position signal feedback device within the housing, which is a proximity switch. During normal operation of the switching mechanism, if the proximity switch detects an abnormality in the position of the turntable, such as failure to reach the expected closing or opening position, or position fluctuations, it will immediately send a fault signal to the control system.

[0010] Secondly, this utility model provides an isolating switch including the above-mentioned switching mechanism. Attached Figure Description

[0011] Figure 1 This is an exploded view of the structure of an embodiment of this utility model.

[0012] Figure 2 This is a schematic diagram of the installation of the spindle assembly and the slider assembly according to an embodiment of the present invention.

[0013] Figure 3 This is a schematic diagram of the spindle assembly structure according to an embodiment of the present invention.

[0014] Figure 4 This is a schematic diagram of the gear included angle distribution according to an embodiment of the present invention.

[0015] Figure 5 This is a schematic diagram of the slider assembly structure according to an embodiment of the present invention. Detailed Implementation

[0016] like Figures 1-5As shown, an embodiment of this utility model provides a gate opening and closing switching mechanism, including a housing 1. The housing 1 contains a main shaft assembly 2 and a slider assembly 3. The main shaft assembly 2 includes a main shaft 21 and a turntable 22 sleeved on the main shaft 21. Gears 23 are provided on the turntable 22, and the gears 23 are distributed in an arc shape around the periphery of the turntable 22. The included angle of the gears 23 is designed to ensure the meshing stability of the gears 23 while reasonably controlling the movement range and gate opening / closing stroke of the mechanism. The slider assembly 3 includes a slider 31, with a insertion hole 32 corresponding to the main shaft 21 on the slider 31. The slider 31 has a receiving cavity 33 for accommodating the turntable 22. The main shaft 21 passes through the insertion hole 32, and both ends of the main shaft 21 extend outside the slider assembly 3. The portion of the spindle 21 on which the turntable 22 is mounted is located within the receiving cavity 33 of the slider 31 in the slider assembly 3. The shape of the receiving cavity 33 is adapted to the turntable 22, and there is a gap between the inner wall of the receiving cavity 33 and the outer wall of the turntable 22. This gap design allows the turntable 22 to rotate smoothly within the receiving cavity 33, while also providing a certain buffering effect. The gear 23 on the turntable 22 protrudes outside the receiving cavity 33. The slider assembly 3 also includes a gear chain (not shown in the figure) mounted on the inner wall of the slider 31. The gear chain has gear grooves 34 evenly distributed in a linear arrangement. The gear grooves 34 are used to engage with the gears 23 on the turntable 22. Through the meshing of the gears 23 and the gear grooves 34, the rotational motion of the spindle 21 can be converted into the linear motion of the slider 31.

[0017] The housing 1 consists of an outer shell 11, a housing cover 12 mounted on the outer shell 11, and an upper cover 13 disposed on the combined structure of the outer shell 11 and the housing cover 12. The outer surface of the housing cover 12 is provided with a closing positioning groove 121 and a closing positioning groove 122. The gear 23 on the turntable 22 meshes with the gear groove 34 on the gear chain. When the main shaft 21 rotates clockwise, the meshing action of the gear 23 and the gear groove 34 drives the slider 31 to move linearly along the closing positioning groove 121 on the housing cover 12, and the turntable 22 rotates to the closing position. When the main shaft 21 rotates counterclockwise, the meshing action of the gear 23 and the gear groove 34 drives the slider 31 to move linearly along the closing positioning groove 122 on the housing cover 12, and the turntable 22 rotates to the opening position.

[0018] The housing 1 is also equipped with two position signal feedback devices 4. These position signal feedback devices 4 are proximity switches and are located on both sides of the main shaft assembly 2. During the normal operation of the opening and closing switching mechanism, if the proximity switch detects an abnormality in the position of the turntable 22, such as not reaching the expected closing or opening position, or experiencing position fluctuations, it will immediately send a fault signal to the control system through the signal line. After receiving the signal, the control system can take timely measures, such as stopping the equipment operation or issuing an alarm, to prevent the fault from escalating.

[0019] The switching mechanism constructed as described above can be used in disconnecting switches.

[0020] Of course, in addition to the above embodiments, this utility model may have other various embodiments. Without departing from the essential technical solution of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, and these changes or modifications are equivalent to the technical solution in this patent. Therefore, these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model, and the utility model creation is in line with the applicant's actual R&D capabilities and resource conditions.

Claims

1. A switching mechanism for opening and closing circuits, characterized in that: The device includes a housing, within which a spindle assembly and a slider assembly are provided. The spindle assembly includes a spindle and a turntable sleeved on the spindle. The turntable has gears arranged in an arc around it. The slider assembly includes a slider with a insertion hole corresponding to the spindle. The slider has a receiving cavity for accommodating the turntable. The spindle passes through the insertion hole, and both ends of the spindle extend outside the slider assembly. The portion of the spindle on which the turntable is mounted is located within the receiving cavity of the slider assembly. The shape of the receiving cavity is adapted to the turntable, and there is a gap between the inner wall of the receiving cavity and the outer wall of the turntable. The gear portion of the turntable protrudes outside the receiving cavity.

2. The opening and closing transition mechanism according to claim 1, characterized in that: The slider assembly also includes a gear chain disposed on the slider, wherein gear grooves are evenly distributed in a linear arrangement and are used to engage with gears on the turntable.

3. The opening and closing transition mechanism according to claim 1, characterized in that: The housing includes an outer shell, a housing cover mounted on the outer shell, and an upper cover disposed on the combination structure of the outer shell and the housing cover. The outer surface of the housing cover is respectively provided with a closing positioning groove and a closing positioning groove.

4. The opening and closing transition mechanism according to claim 3, characterized in that: The gears on the turntable mesh with the gear slots on the gear chain. When the main shaft rotates clockwise, the meshing of the gears and gear slots drives the slider to move linearly along the closing positioning slot on the housing cover, and the turntable rotates to the closing position. When the main shaft rotates counterclockwise, the meshing of the gears and gear slots drives the slider to move linearly along the opening positioning slot on the housing cover, and the turntable rotates to the opening position.

5. The opening and closing transition mechanism according to claim 1, characterized in that: The housing also includes a position signal feedback device, which is a proximity switch.

6. A disconnector, characterized by: Includes the switching mechanism according to any one of claims 1-5.

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