An adjustable isolator yoke structure

Abstract

This utility model relates to the field of disconnecting switch technology, specifically an adjustable disconnecting switch crank arm structure. The utility model includes a fixing plate installed on one side of the operating mechanism of the disconnecting switch. A shaft is rotatably mounted on the fixing plate and fixedly connected to a drive shaft within the operating mechanism. A drive cylinder is sleeved on the side wall of the shaft, and an external spline is provided on the side wall of the shaft. An internal spline matching the size of the external spline is provided on the inner wall of the drive cylinder. A drive plate is fixedly connected to the side wall of the drive cylinder. By providing an external spline on the shaft and an internal spline on the inner wall of the drive cylinder, torsional strength and reliability are provided, preventing relative rotation between the drive cylinder and the shaft under any operating condition. This prevents rotation angles between the crank arm and the shaft, ensuring that the initially set opening and closing angles remain unchanged. This solves the problem of disconnecting switch position drift caused by angle deflection, greatly improving the long-term stability and safety of the equipment.

Description

Technical Field

[0001] This utility model relates to the field of disconnect switches, specifically an adjustable disconnect switch crank arm structure. Background Technology

[0002] Disconnecting switches are important electrical devices in power systems used to isolate circuits and create obvious disconnection points. Their reliable operation is directly related to the safety and stability of the power grid. The crank arm structure, as the core transmission component in the operating mechanism of the disconnecting switch, is responsible for transmitting the operating force or motor driving force to the main shaft of the disconnecting switch, thereby driving the contacts to complete the opening and closing actions.

[0003] In existing technologies, the crank arm of a disconnector switch and the drive shaft are mostly fixed by means of pin connection. Due to the large operating torque and strong impact force of the disconnector switch, after the crank arm is repeatedly subjected to positive and negative torque, it is easy for a small relative rotation to occur between it and the drive shaft. This small deflection angle will accumulate and be transmitted, causing the final opening and closing position of the disconnector switch to drift, resulting in serious problems such as insufficient opening distance or incomplete closing. Therefore, an adjustable disconnector switch crank arm structure is proposed. Utility Model Content

[0004] The purpose of this invention is to provide an adjustable disconnector crank arm structure to solve the problems mentioned in the background art.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] An adjustable disconnector crank arm structure includes a fixing plate, which is installed on one side of the operating mechanism of the disconnector. A shaft is rotatably mounted on the fixing plate and fixedly connected to a drive shaft in the operating mechanism. A drive cylinder is sleeved on the side wall of the shaft, and an external spline is provided on the side wall of the shaft. An internal spline matching the size of the external spline is provided on the inner wall of the drive cylinder. A drive plate is fixedly connected to the side wall of the drive cylinder, and a connecting frame is installed at the end of the drive plate. A threaded post is threadedly installed at the end of the connecting frame.

[0007] Preferably, the end of the drive plate away from the drive cylinder is fixedly connected to a fixed shaft, one end of the connecting frame is rotatably mounted on the fixed shaft, and a locking component is installed between the connecting frame and the drive plate to prevent rotation between the drive plate and the connecting frame.

[0008] Preferably, a gasket is fitted on the side wall of the fixed shaft, the gasket is located between the drive plate and the connecting frame, and the diameter of the end of the fixed shaft is larger than the diameter of the middle part of the fixed shaft.

[0009] Preferably, the drive plate has multiple sets of adjustment holes I through it, and the end of the connecting frame has multiple sets of adjustment holes II through it. The adjustment holes I and II correspond to each other, and a positioning pin is inserted into the adjustment hole II, with the positioning pin passing through the adjustment hole I.

[0010] Preferably, one end of the connecting frame has a connecting hole, one end of the inner wall of the connecting frame is fixed with an internal threaded ring, and one end of the threaded column passes through the connecting hole and is threadedly connected to the internal threaded ring.

[0011] Preferably, a protective sleeve is fitted on the threaded post, and a nut and a connecting ring are threaded onto the threaded post. The protective sleeve is located between the nut and the connecting ring, and the nut abuts against one end of the connecting bracket.

[0012] The beneficial effects of this utility model are:

[0013] This invention employs a spline connection method, which involves setting an external spline on the shaft and an internal spline on the inner wall of the drive cylinder for engagement. The spline connection, with its multi-tooth meshing, uniform load-bearing, and high strength, provides torsional strength and reliability, preventing the possibility of relative rotation between the drive cylinder and the shaft under any operating conditions. This prevents rotational angles between the crank arm and the shaft, ensuring that the initially set opening and closing angles remain unchanged. It solves the problem of disconnector position drift caused by angle deflection, greatly improving the stability and safety of the equipment during long-term operation. Attached Figure Description

[0014] 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, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the crank arm structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the front end structure of the crank arm of this utility model;

[0017] Figure 3 This is a schematic diagram of the drive board structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the connecting frame structure of this utility model;

[0019] The attached figures are labeled as follows:

[0020] 1. Fixed plate; 2. Shaft; 3. External spline; 4. Drive cylinder; 5. Internal spline; 6. Drive plate; 7. Fixed shaft; 8. Shim; 9. Adjustment hole one; 10. Connecting bracket; 12. Adjustment hole two; 13. Connecting hole; 14. Internal threaded ring; 15. Threaded post; 16. Nut; 17. Protective sleeve; 18. Connecting ring; 19. Positioning pin. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] An adjustable disconnector crank arm structure, such as Figures 1-4 As shown, the fixing plate 1 is fastened to one side of the operating mechanism housing of the disconnect switch by bolts, providing a stable support base. A shaft 2 is rotatably mounted at the center of the fixing plate 1 through a bearing or bushing. One end of the shaft 2 is fixed to the drive shaft (not shown in the figure) inside the operating mechanism through a keyway or flange, so as to accurately transmit the rotational torque output by the operating mechanism.

[0023] The side wall of the shaft 2 is machined with an external spline 3. The drive cylinder 4 is sleeved on the outside of the shaft 2, and its inner wall is machined with an internal spline 5 that is perfectly matched with the size of the external spline 3. Through the meshing of the internal and external splines 3, the drive cylinder 4 and the shaft 2 are completely locked in the circumferential direction, and no relative rotation can occur, ensuring the absolute accuracy of the transmission angle. At the same time, the spline fit allows the drive cylinder 4 to slide axially on the shaft 2, which is convenient for disassembly and maintenance.

[0024] A drive plate 6 is welded or integrally formed on the side wall of the drive cylinder 4. A fixed shaft 7 is welded to the end of the drive plate 6 away from the drive cylinder 4. One end of the connecting frame 10 is sleeved on the fixed shaft 7 through a through hole. To ensure that the relative position of the drive plate 6 and the connecting frame 10 is fixed, a locking component is installed between the two to prevent the connecting frame 10 and the fixed shaft 7 from rotating when the crank arm swings. A gasket 8 can be sleeved on the side wall of the fixed shaft 7, at the position between the drive plate 6 and the connecting frame 10, to reduce wear between the drive plate 6 and the connecting frame 10 and to provide uniform pressure when locking. The end of the fixed shaft 7 can be processed into a flange with a larger diameter to play an axial limiting role.

[0025] A preferred method for the locking assembly is as follows: multiple sets of adjustment holes 9 are made through the drive plate 6, and multiple sets of adjustment holes 12 are made through the corresponding ends of the connecting frame 10. After selecting a suitable angle (the angle between the drive plate 6 and the connecting frame 10), the positioning pin 19 is simultaneously inserted into the aligned adjustment holes 9 and adjustment holes 12 to prevent the two from rotating relative to each other.

[0026] The other end of the connecting frame 10 is provided with a connecting hole 13, and an internal threaded ring 14 is welded or press-fitted into its inner wall. One end of the threaded post 15 passes through the connecting hole 13 and forms a threaded connection with the internal threaded ring 14. By rotating the threaded post 15, the length of the threaded post 15 outside the connecting frame 10 can be adjusted. This length is the effective working length, so the effective working length of the entire crank arm structure can be continuously and precisely adjusted, thereby accurately finely adjusting the opening and closing end position of the disconnecting switch, so that the crank arm of this disconnecting switch has an adjustment function.

[0027] A protective sleeve 17 (such as a rubber sleeve) is also fitted on the threaded post 15, and a nut 16 and a connecting ring 18 are threadedly installed to protect the threads and enhance the reliability of the connection. The protective sleeve 17 is pressed between the nut 16 and the connecting ring 18. The nut 16 can abut against the end face of the connecting frame 10. After tightening, it can act as an anti-loosening nut 16 to prevent the threaded post 15 from rotating on its own due to vibration during use. The connecting ring 18 is used to connect with the insulator rod or other connecting rod of the disconnecting switch.

[0028] The working principle of the adjustable disconnector crank arm structure provided by this utility model is as follows:

[0029] Fix the fixing plate 1 to the operating mechanism housing and fix the shaft 2 to the mechanism drive shaft. Align the inner spline 5 of the drive cylinder 4 with the outer spline 3 of the shaft 2 and insert it axially to the predetermined position. Fit the connecting bracket 10 onto the fixing shaft 7 of the drive plate 6. Select the required hinge angle, insert the positioning pin 19 to lock it, rotate the threaded column 15 and adjust its extension length until the opening or closing position of the disconnecting switch meets the standard requirements. Tighten the nut 16 on the threaded column 15 to press it against the end face of the connecting bracket 10 to prevent the threads from loosening. The connection between the inner spline 5 and the outer spline 3 prevents the possibility of relative rotation between the drive cylinder 4 and the shaft 2 under any working condition, thereby preventing the rotation angle between the crank arm and the shaft 2 and ensuring that the initially set opening and closing angle remains unchanged. This solves the problem of disconnecting switch position drift caused by angle deflection and greatly improves the stability and safety of the equipment in long-term operation.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An adjustable disconnector crank arm structure, comprising a fixing plate (1), characterized in that, The fixing plate (1) is installed on one side of the operating mechanism of the disconnect switch. A shaft (2) is rotatably installed on the fixing plate (1). The shaft (2) is fixedly connected to the drive shaft in the operating mechanism. A drive cylinder (4) is sleeved on the side wall of the shaft (2). An external spline (3) is provided on the side wall of the shaft (2). An internal spline (5) matching the size of the external spline (3) is provided on the inner wall of the drive cylinder (4). A drive plate (6) is fixedly connected to the side wall of the drive cylinder (4). A connecting frame (10) is installed at the end of the drive plate (6). A threaded post (15) is threadedly installed at the end of the connecting frame (10).

2. The adjustable disconnector crank arm structure according to claim 1, characterized in that, The drive plate (6) is fixedly connected to a fixed shaft (7) at one end away from the drive cylinder (4). One end of the connecting frame (10) is rotatably mounted on the fixed shaft (7). A locking component is installed between the connecting frame (10) and the drive plate (6) to prevent rotation between the drive plate (6) and the connecting frame (10).

3. The adjustable disconnector crank arm structure according to claim 2, characterized in that, A gasket (8) is fitted on the side wall of the fixed shaft (7). The gasket (8) is located between the drive plate (6) and the connecting frame (10). The diameter of the end of the fixed shaft (7) is larger than the diameter of the middle part of the fixed shaft (7).

4. The adjustable disconnector crank arm structure according to claim 2, characterized in that, Multiple sets of adjustment holes 1 (9) are provided through the drive plate (6), and multiple sets of adjustment holes 2 (12) are provided through the end of the connecting frame (10). Adjustment holes 1 (9) correspond to adjustment holes 2 (12), and positioning pins (19) are inserted into adjustment holes 2 (12). Positioning pins (19) pass through adjustment holes 1 (9).

5. The adjustable disconnector crank arm structure according to claim 1, characterized in that, The connecting frame (10) has a connecting hole (13) at one end, and an internal threaded ring (14) is fixedly connected to one end of the inner wall of the connecting frame (10). The threaded column (15) passes through the connecting hole (13) and is threadedly connected to the internal threaded ring (14).

6. The adjustable disconnector crank arm structure according to claim 5, characterized in that, A protective sleeve (17) is fitted on the threaded post (15). A nut (16) and a connecting ring (18) are threaded on the threaded post (15). The protective sleeve (17) is located between the nut (16) and the connecting ring (18). The nut (16) abuts against one end of the connecting frame (10).

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